Geotechnology

User Generated

zbunzzrq212096

Engineering

Coventry University

Description

Hello ,,

this is my Geotechnology assignment, please read carefully, its so important

you have to do it based on these information:

**Cousre grained soul bulk unit weight :18 kn/m3
Course grained soil friction angle :45 degress
Clay soil saturated cohesion : 90 Kpa

Unformatted Attachment Preview

Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP Department of Civil Engineering Geotechnology 2 (CIVL 0016) Coursework Assignment (FALL 2019) (Max. Marks: 100, to be scaled down to out of 50) Submission: Week 7 (Proposal) Week 12 (Main Report) COURSEWORK ASSIGNMNET: ANALYSIS AND DESIGN OF GEOTECHNICAL STRUCTURES A. GENERAL DIRECTION For this coursework, students are required to submit a coursework report in week 12 to be marked out of 100% (and then scaled down to coursework report (45) + proposal (5): 50). Also, students are advised to conduct soil laboratory tests in order to gather relevant soil parameters and also to generate any missing data from the available data. Wherever needed, students are encouraged to apply educated judgment and assumptions. Moreover, the source(s) of each assumed data should be cited using the CU-Harvard citation format – format adopted by MEC. Generated data, if any, should be discussed in depth. Wherever required, please use sketches to explain your answers. B. LEARNING OUTCOMES i. Solve geotechnical engineering problems and analyze and interpret data. ii. Analyze the flow of water through soil via the use of flow nets and its effect below structures and through earth-dams; to use appropriate mathematical methods of analyzing geotechnical problems. iii. Work with limited information to achieve an engineering approach to the solution of problems. Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP C. OBJECTIVES i. To carry out the analysis and design of geotechnical structures specified in the assessment brief with emphasis on sustainability and health and safety requirements ii. To interpret the design outputs iii. To submit a technical report that follows a standard report protocol D. QUESTIONS Q1: An L-shaped cantilever retaining wall is shown below. Provide structural design of the retaining wall. Use fck = 30 N/mm2 and fyk = 500 N/mm2 q = 15 kN/m2 0.3 m Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP Q2: Design a rectangular pad foundation that carries a permanent load of 1800 kN (without footing self-weight) and a variable load of 1300 kN. The allowable bearing pressure on the soil is 200 kN/m2. The top of the footing is to be covered with 1.5 m fill with a unit weight of ------ kN/m3. Material properties are: C30 concrete and fyk = 500 N/mm2 reinforcement bars. Compare your hand-calculation with the STAAD foundation design outputs and reflect on the results. Q3: Write a short critical note (5-8 pages) on design philosophy of earthen dams that consists of a) Introduction b) Design aspects (including slope stability check health and safety/, sustainability/sustainable earth dam construction) aspects c) Seepage analysis d) Seepage management Q4: Determine the ultimate load carrying capacity of a group pile in the following scenarios: a) Piles are 20 m long, 3 by 3 in plan, square in cross section and to be driven into a granular soil b) Piles are 20 m long, 3 by 3 in plan, circular in cross section and to be driven into a granular soil c) Provide a reflective comment on your results (i.e. the effect of pile shape on its load bearing capacity) Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP E. REPORT FORMAT For paper formats (font type, font size, margins, etc.) refer to the lab report preparation format that had been uploaded earlier. The structure of the current report is expected to contain at least the following. 1) COVER PAGE  College name & logo  Department name  Your name and I.D. number  Semester: FALL 2019 2) TABLE OF CONTENTS Provide a table of contents with corresponding page numbers. 3) INTRODUCTION In the introduction part of your report, you are attempting to inform the reader about the rationale behind your work. In other words, you are justifying why your work is an essential component of the module you are taking (Geotechnology 2, CIVL 0016). The introduction is written with the view of introducing the topic of your paper and setting it into a broad context, gradually narrowing down to your learning outcomes. You may also state what type of approach you will be using in your paper for the entire discussion of your topic. Suffice to write a maximum of one page introduction (half page is OK). 4) MATERIALS, METHOD OF ANALYSIS AND RESULTS This section also covers the data collection and analysis methods, such as computer models (software), mathematical models, questionnaires, interviews, visual observations, etc. Relevant soil parameters and calculations should be shown clearly. 5) DISCUSSION The purpose of a results section is to present and illustrate your findings. Make this section a completely objective report of the results. The purpose of the discussion section is to provide an Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP interpretation of your results and support for all of your conclusions, using evidence from your calculations and results, literature review and generally accepted knowledge, if appropriate. The significance of findings should be clearly described. 6) CONCLUSION In academic writing, a well-crafted conclusion can provide the final word on the value of your analysis, research, or paper. Complete your conclusions with conviction! Consider the conclusion from the reader's perspective. At the end of a paper, a reader wants to know how to benefit from the work you accomplished in your paper. Include the following in your conclusion.  How do the ideas in your report connect to what we have discussed in class, or to what scholars have written in their treatment of your topic?  What new ideas have you added to the conversation? What ideas do you critique?  What are the limitations of your data, methods, or results?  What are the consequences of the strongest idea that comes out of your report? F. RULES Please note the following rules. PLAGIARISM POLICY  Plagiarized documents, in parts or whole, submitted by the students will be rejected. For the first offence of plagiarism, a student enrolled in undergraduate program is penalized with a deduction of 25% of the obtained marks on the assessment as per the plagiarism policy statement and is allowed to re-submit the work once, within two days. The student has the right to appeal against the decision made, to the respective Program Coordinator. Further appeal on decision taken may be made to the Head of the concerned department. If the student is not satisfied by the decisions taken by the department, s/he can appeal to the Plagiarism Appeals Committee.  For the second offence of plagiarism against the student, (committed in any semester after the semester of the student‘s first offence of plagiarism in the tenure of the student in the undergraduate program), the student is awarded zero in the assessment where plagiarized Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP content was found. The student is not allowed to re-submit the assessment. The student has the right to appeal against the decision made to the respective Program Coordinator. Further appeal on decision taken may be made to the Head of the concerned department. If the student is not satisfied by the decisions taken by the department, s/he can appeal to the Plagiarism Appeals Committee.  Repeated offences of plagiarism by the student (more than two times) are dealt with as per the college policy on Academic Dishonesty as mentioned in the Student Handbook.  All decisions on plagiarism related offences will be communicated to the student by the respective module instructors, using routine channels of communication with students, currently used by the college, preferably on the same day the charges are confirmed or the very next working day.  The student has the right to appeal against the decision informed by the module instructor to the respective Program Coordinator. Further appeal on decision taken may be made to the Head of the concerned department. If the student is not satisfied by the decisions taken by the department, s/he can appeal to the Plagiarism Appeals Committee.  In certain cases, the student may be required to appear for an interview with the module instructor, if deemed necessary.  The maximum time limit given to a student to raise appeal against the charges of plagiarism is two working days including the day on which the matter is informed to the student. It is preferable that the appeals are made on the same day of the college on which the student is informed of the issue. All appeals must be made during regular working hours of the college. LATE SUBMISSION  Penalty for late submission: 5% of the achieved mark specified for the assessment will be deducted for each 5 working days after the due date.  Assessment documents submitted beyond the post date of submission will not be accepted and will be marked as zero for that assessment Scoring Rubrics Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP Classification and Mark Range (in %) Reflection and critical analysis. Outstanding (  91%) Evidence of Reading Referencing and Bibliography Presentation, Grammar and Spelling Highly Knowledge and Understanding/ Application of Theory Extensive Evidence of Accurate Excellent competent knowledge and reading an referencing presentation, analytical skills depth of extensive range and logically and reflective understanding of educational bibliography structured, practice, of principles literature/researc correctly using correct demonstrating and concepts h and where using grammar and personal and /or applicable appropriate spelling, learning and outstanding workplace referencing excellent cross- growth, insight application of strategies, style referencing and into required theory in policies and links to professional practice. procedures. supporting values and evidence principles and professional development planning. Excellent (84-90) % Strong Excellent Evidence of Appropriate Good analytical skills knowledge and reading a wide referencing presentation, and reflective understanding range of and competently practice used, of principles educational bibliography structured, demonstrating and concepts literature/researc correctly using correct personal and /or h and where using grammar and learning and excellent applicable, appropriate spelling, clear growth, insight knowledge and workplace referencing and easy to use into required understanding strategies, style links to professional of the policies and supporting values, application of procedures. evidence Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP principles and theory in competencies practice and professional development planning. Very Good Good use of Good Evidence of Generally Reasonable Quality analytical skills knowledge or reading a good well presentation, and reflective key principles range of referenced completely practice and concepts educational with correct structured, demonstrating and/or good literature/researc use of the acceptable personal knowledge of h and where appropriate grammar and learning and the application applicable referencing spelling, growth, insight of theory in workplace style acceptable links into required practice strategies, to supporting professional policies and evidence values, procedures. (77-83)% principles and competencies and professional development planning. Good Acceptable use Acceptable Evidence of Adequate Adequate (Acceptable) of analytical knowledge of reading an referencing. presentation skills and key principles appropriate Generally and structure, reflective and concepts range of accurate use acceptable practice and/or educational of grammar and demonstrating knowledge of literature/researc appropriate spelling, personal the application h and where referencing adequate links learning and of theory in applicable, style to supporting growth, insight practice relevant (70-76)% into required professional workplace evidence Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP values, policies and principles and procedures competencies and professional development planning. Adequate/ Adequate use of Adequate Evidence of Adequate Weak Satisfactory analytical skills knowledge of minimal reading referencing. presentation , and reflective key principles of educational Appropriate satisfactory practice and concepts literature/researc referencing structure, demonstrating and/or h and where style used but grammar and personal satisfactory applicable may contain spelling, links learning and evidence of the relevant some to supporting growth, insight application of workplace inaccuracies. evidence into required theory in policies and professional practice procedures Little use of Little evidence Little or no Little or no Poor analytical skills of knowledge evidence of referencing, presentation, and reflective of key reading outside incorrect grammar and practice principles or of the course style, or very spelling, links demonstrating concepts and/or textbook and/or inaccurate use to supporting personal little evidence reference to of appropriate evidence learning and of the relevant work referencing growth, insight application of place policies and style into required theory in procedures competencies practice (50-69)% values, principles and competencies and professional development planning. Weak /Poor (all learning outcomes not adequately met) (< 50%) and/or Unacceptable presentation, Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP and/or and/or professional development planning. Professional values and principles not reflected in the submission. No evidence of knowledge of key principles or concepts and/or no evidence of application of theory in and/or Insufficient/no use of analytical skills and reflective practice demonstrating personal learning and growth, insight into required competencies and professional development planning practice and/or no grammar and evidence of spelling, reading outside structure is very of the course poor, links to textbook and/or supporting reference to evidence relevant workplace policies and procedures Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP Student’s I.D __________________________: Student’s Name_____________________ Marking Matrix (PROPOSAL) No . 1 3 2 4 4 Description Fail (0-49)% Satisfactory (50-69)% Good (70-76) V. good (77-83)% Excellent (84-90)% Outstanding (≥ 91%) Proposal structure (including referencing and citation) Summary Objectives drawn from learning outcomes Background (based on literature review) Work plan Allotte d Mark 20 20 10 30 20 Final mark out of 100 Penalty (if any) Final mark out of 100 Final mark out of 10 Mark earned Geotechnology 2 (CIVL 0016) – Fall 19 – CW - QP Marking Matrix (Main report) Student’s Name_______________________________ ID: _____________________ No. Description 1 Full report structure (including referencing) Introduction 2 3 5 Fail (0-49)% Satisfactory (50-69)% Good (70-76)% Very good (77-83)% Excellent (84-90)% Outstanding (≥ 91%) Mark allotted 4 6 Critical analysis, results and discussion Q1 Q2 Q3 Q4 Conclusion 20 20 20 20 10 Final mark out of 100 Penalty Final mark out of 100 Final mark out of 90 Total mark (Proposal + Report) out of 100
Purchase answer to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

Explanation & Answer

Attached.

Structural Analysis and Design

ANALYSIS AND DESIGN OF GEOTECHNICAL STRUCTURES

By Student Name and ID

Geotechnology 2 (CIVL 0016)
Professor’s Name
Middle Eat College
Department of Civil Engineering
FALL 2019
Date

1

Structural Analysis and Design

2

TABLE OF CONTENTS
INTRODUCTION .......................................................................................................................... 3
MATERIALS, METHODS OF ANALYSIS AND RESULTS ..................................................... 4
DISCUSSION ................................................................................................................................. 4
Analysis and Design of a Cantilever Retaining Wall ............................................................. 4
Design Parameters ................................................................................................................. 4
Approximate Proportions ..................................................................................................... 5
Checking for Sliding .............................................................................................................. 6
Overturning ............................................................................................................................... 6
Ground bearing pressure ...................................................................................................... 7
Stem Design ............................................................................................................................ 8
Base/Heel Design .................................................................................................................... 8
Rectangular Pad Footing Design and Analysis....................................................................... 9
Loading ................................................................................................................................. 10
Bending Reinforcement ....................................................................................................... 10
Ultimate Moment ................................................................................................................. 11
Main steel.............................................................................................................................. 12
Punching Shear .................................................................................................................... 12
Face Shear ............................................................................................................................ 13
Transverse Shear ................................................................................................................. 13
Design Philosophy of Earthen Dams ..................................................................................... 14
Introduction ......................................................................................................................... 14
Design Aspects...................................................................................................................... 15
Seepage Analysis .................................................................................................................. 15
Seepage Management .......................................................................................................... 16
Load Carrying Capacity of a Group Pile .............................................................................. 17
Ultimate bearing capacity for pile with square cross-section .......................................... 17
Ultimate bearing capacity for pile with circular cross-section ........................................ 18
CONCLUSION ........................................................................................................................... 19
References ..................................................................................................................................... 20

Structural Analysis and Design

3

INTRODUCTION
Geotechnical structures are important engineering structures since they are designed
using scientific methods, simulation and approaches to ensure that end results have features that
ensure safety of those using the structures as well as the health. These structures also offer the
required service for an extended period, that is, they can fiction for many years; hence, they are
sustainable. Examples of these geotechnical structures include but are not limited to retaining
walls, building foundations, bridges, tower, and earth dams, among other structures.
Geotechnical engineers use different scientific approaches and methods to evaluate
materials and conditions of the soil in different environments while applying the principles of
mechanics of rocks and soil to offer solutions to problems related to these structures by
analyzing and designs structures that suit particular purposes. Conditions considered for
sustainability, safety of retaining wall meant for retaining back fill along a road might differ from
those considered for the construction of retaining all meant for landscaping and beauty.
Geotechnical properties of the soil and rock material such as compaction, permeability, cohesion,
seepage are analyzed in lab or field before considering design of structures (Roy & Bhalla 2017).
This report aimed to provide an experience to the analysis and design of geotechnical
structures, that is, cantilever retaining wall, a pad foundation, a group pile and earthen dams,
with the focus and emphasis on safety and sustainability needs. Interpretation of design output
was also part of this report’s objectives. This report is crucial in the Geotechnology 2, CIVL
0016 module because it gives me an opportunity to exploit my ability to design geotechnical
structures that form a solution to a specific engineering problem. It is a good evaluator and a way
of improving my understanding of the class concepts learned.

Structural Analysis and Design

4

MATERIALS, METHODS OF ANALYSIS AND RESULTS
The structural design of a retaining wall involved providing the size of steel
reinforcements that can withstand all the horizontal and vertical forces acting on the wall.
Necessary checks for safety were also computed and include failure due to shear, overturning
and sliding. In designing a rectangular pad footing, the load factor method was used in the entire
process to determine design parameters. The given loads were multiplied by various factors of
safety for both dead loads and live and variable loads to obtain design loads. The design of the
rectangular pad footing involved determining the pad footing plan area with the use of
serviceability loads while considering in design assumptions. Reinforcement areas necessary for
bending were determined using the ultimate loads calculated. The designed rectangular pad
footing was checked for punching shear, transverse, and face shear failures. Evaluating the effect
of shape on the load carrying capacity of a group pile utilized the static method that involved
determine nation of the bearing resistance and the skin friction resistance capacity of the group
piles. Both of these forces were determined using empirical models and mathematical formulas.
DISCUSSION
Analysis and Design of a Cantilever Retaining Wall
Design Parameters
Unit weight of soil, 𝛾𝑠 =18kN/m3
Surcharge, 𝜔==15kN/m2
Height of surcharge, h =3+0.3=3.3m
Height of wall, H=3.0m
fck=30N/mm2

Structural Analysis and Design
fyk=500N/mm2
Assumed concrete cover= 75mm
Approximate Proportions
Base width, L=2.3m
Base thickness, D=0.10H; H=0.3/0.1= 3m
Stem thickness at the bottom, C=0.10H=0.10*3=0.3m
L=2.0 + 0.3=2.3m

1−sin ∅ 1−sin 45

Ka=

=

= 0.172

1+sin ∅ 1+sin 45

Active pressure= ka𝛾sh =0.172*18*3.3=10.22kN/m2

5

Structural Analysis and Design

Checking for Sliding
Considering forces acting on 1m length wall
Horizontal force due to back fill=1/2* ka𝛾sh2=1/2*0.172*18*3.32=16.86kN
Force due to surcharge=𝜔kah=15*0.172*3.3=8.514kN
Total active horizontal force= 8.514 +16.86= 25.374kN
Assume passive pressure, pp=0
Weight of wall, Ww=0.3*3.0*1*24=21.6kN
Weight of base, Wb=2.3*0.3*1*24= 16.56kN
Weight of surcharge, W𝜔=15*2*1=30Kn
Total resisting or vertical force=176.16kN
Assuming friction factor of 0.4, friction force= 0.4*176.16=70.464kN
𝑅𝐹 70.464

=

= 2.78 > 1.5 (OK), that is, it is safe from sliding

𝑆𝐹 25.374

Overturning
Taking moments about point A;
Overturning moment, OM=H/3*FA + ½*Fω= 1/3*3.3*16.86 + ½*3.3*8.514= 32.5941kNm
Restoring moments, RM=Ws*1.3 + Ww*0.15 + Wω*1.3 + Wb*1.15=
= 108*1.3 + 21.6*0.15 + 30*1.3 + 16.56*1.15=201.684kNm
=201.684kNm

6

Structural Analysis and Design
𝑅𝑀

201.684

Factor of safety against overturning=𝑂𝑀 = 32.59141= 6.19 < 2.0

(OK) hence structure is safe

from overturning.
Ground bearing pressure
Taking a 1m strip of footing
R. F or P=176.16Kn; A= 2.3*1= 2.3 m2
OM (M)= 32.5941; d=2.3m; L=1m;
𝑃

6𝑀

Maximum soil bearing capacity, qmax=𝐴 + 𝑏𝑑2 < qall =

176.16
2.3

(allowable), hence OK!
Ultimate bearing pressure;
Nominal moment, Mn=32.5941;
Ultimate moment, Mu=1.6Mn=1.6*32.5941=52.15056kNm
b=1m; d=2.3m
A=2.3*1 =2.3m2
P=1.6Ws + 1.4Wb + 1.4Ww + 1.6W𝜔
= 1.6*108 + 1.4*16.56 + 1.4*21.6 + 1.6*30= 274.224kN
𝑃

6𝑀

qu=𝐴 ± 𝑏𝑑2 =

274.224
2.3

qumin= 60.08kN
qumax=178.38kN

±

6∗52.15056
2.32

+

6∗32.5941
1∗2.32

= 113.56kPa ≤ 120 kPa

7

Structural Analysis and Design

M=32.5941; N= 176
M/N=32.5941/176.16=0.185m < d/6=2.3/6=0.38
Stem Design
Stem height=3m
Horizontal force due to back fill on the stem= ½*ka*𝛾s*hs2= ½*0.172*18*32= 13.932 kN/m
width
Design moment at the base of the wall, Ml=

𝑟𝑓 ∗𝐹�...


Anonymous
Goes above and beyond expectations!

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Similar Content

Related Tags