CE 468 Geotechnical Design
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1 CE 468 Geotechnical Design Course Objectives: The objective of this course is to familiarize the students to fundamental geotechnical engineering design problems and solutions. Discussions will focus on the design of shallow and deep foundations. Bearing capacity and settlement performance assessments of these foundation systems will be reviewed. In addition, methods for dewatering of foundation excavations, limit equilibrium stability assessments along with the design of in-situ retaining structures are to be discussed. Foundations on problematic soils including swelling, collapsing, liquefiable soils, etc., will be studied with emphasis on mitigation design alternatives. Catalog Description : Design problems in geotechnical engineering: Shallow foundations, consideration of differential settlements, foundations on bored and driven piles, dewatering of a foundation pit, stabilization of landslides by various methods. In-situ retaining structures for excavation support, foundations on problematic soils, ground improvement against excessive settlements and liquefaction. Course Learning Objectives: To improve design approaches to open ended engineering problems. Lectures: Thursday 13:40 16:30 Room : CES-3 Instructor: Room: Part-time cekinmez@metu.edu.tr Teaching Assistants: Res. Asst. Muhammed Batuhan Tezcan Room: K1-314 Phone: btezcan@metu.edu.tr Office Hours: Tuesday 13:40-15:30 Res. Asst. Yağızer Yalçın Room: K1-115B Phone: yyalcin@metu.edu.tr Office Hours: Wednesday 15:40-17:30 * Office hours will only be held in room K1-215/B Homework: 9 homework assignments and a term project will be given. Term Project: A term project will be assigned and students will work in 2-3 person groups. The submitted project reports should be concise (total of 8 pages of text and figures, excluding the supporting information provided in appendices) Participation: Classroom participation is strongly encouraged. Grading: Assignments : 25 % ; Midterms I and II : % ; Term project and/or Final : 35 %
2 Course Material Poulos, H. G. and Davis, E. H. (1980). Pile Foundation Analysis and Design, Rainbow-Bridge Book Co., Canada. Prakash, S. and Sharma H. D. (1990). Pile Foundations in Engineering Practice, John Wiley & Sons. Tomlinson, M. J. (1995), Foundation Design and Construction, Longman, 6th edition. Craig, R. F. (1997), Soil Mechanics, E & FN Spon, Taylor & Francis Group, 6th edition, Van Nostrand Reinhold (UK). Birand, A. (2001). Kazıklı Temeller, Teknik Yayınevi, Ankara.Das, B. M. (2011). Principles of Foundation Engineering, Thomson, 4th Edition. Canadian Geotechnical Society (2006). Canadian Foundation Engineering Manual, BiTech Publishers Ltd., 4th edition, Canada. BS Manuals: BS (2010) Code of Practice for Strengthened Reinforced Soils and Other Fills, BS (2010) Code of Practice for Strengthened Reinforced Soils and Other Fills-Soil Nail Design Ordemir, İ. (2012). CE 366 Lecture Notes: Foundation Engineering METU Publication, Ankara. Erol, A. O. ve Çekinmez, Z. (2014). Geoteknik Mühendisliğinde Saha Deneyleri, Yüksel Proje Yayınları No: 14-01, Ankara, 278 pages. Erol, A. O., Çekinmez Bayram, Z. ve Kuruoğlu, Ö. (2016). Vibro Zemin Iyileştirme Yöntemleri Vibro Sikiştirma Ve Taş Kolonlar, Yüksel Proje Yayınları, Ankara, 152 pages. FHWA Manuals: Soil Nail Walls (FHWA0-IF ) US Army Corps Manuals: Retaining and Flood Walls (EM ), Design of Pile Foundations (EM )i Design of Sheet Pile Walls (EM ) NAVFAC DM 7.01 Soil Mechanics and DM 7.02 Foundations and Earth Structures Syllabus Week Date Subject Assignments 1 23 Feb Introduction March Site Investigations ASSIGNMENT I (Due Date: ) 3 9 March Soil Characterization ASSIGNMENT II (Due Date: ) 4 16March Shallow Foundations ASSIGNMENT III 5 23March Shallow Foundations (Due Date: ) Deep Foundations 6 30March Deep Foundations ASSIGNMENT IV (Due Date: ) 7 6 April Deep Foundations 8 13April Limit Equilibrium-Based ASSIGNMENT V Slope Stability Assessments (Due Date: ) 8 14 April MIDTERM-1 (17:40-19:40) Content: Weeks April Problematic Soils ASSIGNMENT VI (Due Date: ) April Design of Retaining Structures ASSIGNMENT VII (Due Date: ) 11 4 May Preloading & Vertical Drains ASSIGNMENT VIII (Due Date: ) May Vibro Techniques ASSIGNMENT IX (Due Date: ) May Soil Nail Walls - No lecture May MIDTERM-2 (17:40-19:40) Content: Weeks 5-7 (Deep Foundations) and Weeks 9-13 Final Day* TERM PROJECT PRESENTATIONS *Final day will be announced by METU-Student Affairs through
3 I. Introduction to Geotechnical Design (3 hrs) i. Course objectives II. Site Investigations. Review of widely used site investigation techniques (3 hrs.) i. Soil Drilling ii. In-situ Tests: SPT, CPT, PMT, DMT, FVT, PLT, Geophysical Tests. ASSIGNMENT I III. Soil Characterization. (3 hrs.) ii. Idealized Soil profile iii. Estimation of Soil Design Parameters: i. Soil Behavior and Critical State Conditions ii. Soil Classification iii. Undrained and Drained Shear Strength Parameters iv. Undrained and Drained Stiffness Parameters v. Permeability Parameters ASSIGNMENT II IV. Design of Shallow Foundations (4 hrs.) ii. Empirical Methods for the Estimation of Bearing capacity i. SPT ii. CPT iii. PMT iii. Empirical Methods for the Estimation of Immediate Settlement i. CPT ii. PMT iv. Theorotical Approach for the Estimation of Primary Consolidation Settlement v. Theorotical Approach for the Estimation of Secondary Consolidation Settlement vi. Criteria for Total and Differential Settlements vii. Subgrade Reaction Coefficient ASSIGNMENT III V. Design of Deep foundations (8 hrs.) ii. Capacity of Pile in Soil under Compressive (Vertical) Loads i. Single Pile Capacity ii. Pile Group Capacity iii. Capacity of Pile in Rock under Compressive Loads i. Driven Piles Bearing on Rock ii. Bored Piles Bearing on Rock iv. Pile Group Capacity i. Conventional Methods ii. Elastic Solutions v. Pile-Raft Systems vi. Laterally Loaded Piles i. Definitions ii. Methods of Calculating Lateral Resistance of Piles
4 vii. iii. Methods of Calculating Acceptable Deflection and Working Load Piles in Fill (Negative Skin Friction) ASSIGNMENT IV VI. Limit Equilibrium-based Slope Stability (3 hrs.) ii. Failure Modes iii. Review of Limit Equilibrium Methods: (1 hr.) i. Translational Slips ii. Compound Slips (Block and Wedge Analysis) iii. Rotational Slips iv. Limit equilibrium analysis software: (1 hr) Slidev7.0- Rocscience v. Design of soil slopes (1 hr.) ASSIGNMENT V MIDTERM I VII. Design of Foundations on Problematic Soils (3 hrs.) i. Collapsible soils ii. Swelling soils ASSIGNMENT VI VIII. Design of Retaining Structures (3 hrs.) ii. Gravity Walls iii. Cantilever Walls iv. Mechanically Reinforced (Stabilized) Earth Walls (MSE) ASSIGNMENT VII IX. Preloading and Vertical Drains (3 hrs.) ii. Preloading iii. Vertical Drains ASSIGNMENT VIII X. Vibro Techniques for Ground Improvement (3 hrs.) i. General ii. Vibrators iii. Construction Methods iv. Vibro-Compaction Method v. Vibro-Replacement Method (Stone Columns) ASSIGNMENT IX XI. Soil Nail Walls (3 hrs.) i. General ii. Basic Elements of a Soil Nail Wall iii. Construction Sequences iv. Applications of Soil Nail Walls v. Feasibility Evaluations of Soil Nail Walls vi. Bond Strength vii. Analysis of Soil Nail Walls viii. Wall Displacements ix. Design of Soil Nail Walls MIDTERM II
5 # Definition (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) Knows site investigation methods, designs a site investigation program X X X X X Characterize and model soil sites X X X X Design soil slopes X X X X X Knows foundation types and design shallow foundations X X X X Assess bearing capacity of foundation soils X X X X X Design deep foundation systems X X X X X Knows lateral earth pressure theory, types of retaining structures and design retaining X X X X X structures Design a geosystem X X X X X
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