Downloadable Documents:-

001. [Hong Kong BD] Code of Practice for Foundation 2017

002. [Hong Kong CEDD] Geoguide 1: Guide to Retaining Wall Design (2020 version)

003. [Hong Kong CEDD] Geoguide 2: Guide to Site Investigation (2017 version)

004. [Hong Kong CEDD] Geoguide 3: Guide to Rock and Soil Description (2017 version)

005. [Hong Kong CEDD] Geoguide 4: Guide to Cavern Engineering (2018 version)

006. [Hong Kong CEDD] Geoguide 5: Guide to Slope Maintenance (2021 version)

007. [Hong Kong CEDD] Geoguide 6: Guide to Reinforced Fill Structure and Slope Design (2017 version)

008. [Hong Kong CEDD] Geoguide 7: Guide to Soil Nail Design and Construction (2017 version)

010. [Hong Kong CEDD] Geospec 3: Model Specification for Soil Testing (2017 version)

012. [Hong Kong CEDD] Geotechnical Manual for Slopes

013. [Hong Kong CEDD] Highway Slope Manual

014. [Hong Kong CEDD] Foundation Design and Construction

015. [Hong Kong CEDD] Engineeing Geological Practice in Hong Kong

021. Common Universal Bearing Pile Properties

022. The Technical and Contractual Matters of Bored Piling Works

023. Bored Pile Technology

024. Method Statement – Bored Piling

026. BS EN 14490: Soil Nailing

027. Soil Nailing for Slope Strengthening

028. Hong Kong Geology Guide Book

029. Piled Foundation Design and Construction

030. Bored Pile Installation

031. Method Statement of Bored Piles

032. Site Investigation

033. Geotechnical Design – Worked Examples

034. Piezometer

035. Standpipe

036. text – Pile Design and Construction Practice - Tomlinson

037. Pipe Piles

038. text – Foundation Design and Construction - Tomilinson

039. text – Basics of Foundation Design

040. text – Foundation Analysis and Design – Bowles

041. text – Principles and Practices of Soil Mechanics and Foundation Engineering

042. text – Foundation Engineering Handbook

043. Bored Piling Works

044. Minipiling

045. Structural Foundation Designer’s Manual


Reference Documents:

001. Calculation of Active Force on Retaining Wall with Coulomb's Formula

002. Retaining Wall - Factor of Safety Checks, and 4 Modes of Failures

003. Soil-Cement

004. Rock Phrase Cycle

005. Soil Permeability, and Typical Values of Hydraulic Conductivity of Saturated Soils

006. Foundation Stress Spread with Depth (The 2:1 Method)

007. A Concentrated Point Load on a Footing and the Stresses Underneath (Westergaard and Boussinesq equations)

009. Symbols using Greek Alphabet

010. Graph of Bearing Capacity Factors

011. Typical Soil Unit Weights

012. Simplified Method for Estimating Ground Settlement

013. Elastic Moduli of Clay and Granular Soils

014. Typical Values of Liquid Limit and Plastic Limit of Some Clay Minerals (PI) plastic index = (LL) liquid limit  minus  (PL) plastic limit)

015. Estimation of Soil Nail Tension Capacity from Value of Standard Penetration Test

016. Typical Required Borehole Depths

017. Rectangular Footing: Contact Pressure with Soil and Pressure Diagram

018. Additional Soil Stresses due to a Vertical Line Load

019. Additional Soil Stresses due to an Infinite Strip of Uniform Vertical Loading

020. Additional Soil Stresses due to a Vertical Load (in Cylindrical Coordinate System)

021. Vertical Stress Below a Rectangular Loaded Area

022. Newmark's Chart (It's a tool for estimation of a soil point stress under a building. See text of G.E. Barnes)

023. Blank Log Paper (for plotting geotechnical graphs)

024. Calculation of Lateral Earth Pressure on a Retaining Wall due to a Line Load

025. Calculation of Lateral Earth Pressure on a Retaining Wall due to a Uniform Area Load

026. Plate Load Test (ASTM D1194) for reference. HK has her own standard tests.

028. Capacity of Strip Footings

029. Rankine Theory of Active and Passive Soil Pressure

030. Coulomb Theory of Active and Passive Forces

031. Ultimate Pile Capacity


Youtube Videos:

001. What is Geotechnical Engineering ..

003. Basic Introduction to Soil Strength (compared with steel, concrete, and water)

004. Drained and Undrained Soil Shear Strength

005. Simple Frictional Model of Soil Strength

006. Soil Density and Proctor Test

007. The Effect of Water on Soil Strength (video linked to this site on 14 Aug 2018)

008. The Effect of Particle Size and Shape on Soil Strength (video linked to this site on 14 Aug 2018)

009. Atterberg Limit Tests (LL: Liquid Limit, and PL: Plastic Limit) ASTM (video linked to this site on 15 Aug 2018)

010. Triaxial Shear Test (video linked to this site on 15 Aug 2018)

011. Direct Shear Test (video linked to this site on 22 Aug 2018)

012. Lecture on Classification of Soil in the Field (video linked to this site on 20 Aug 2018)

013. Understand Soil Types and Soil Texture (video linked to this site on 22 Aug 2018)

015. Advice for New Geotechnical Engineers (video. 23 May 2019)

016. Introduction to Geotechnical Engineering (video. 23 May 2019)

017. How Quicksand Causes Dam Failures (video. 23 May 2019)

018. The Importance of Geotechnical Engineering (video. 23 May 2019)

019. What is a Deep Foundation (video. 23 May 2019)

021. Failure of a Braced Retaining Wall in Istanbul (video, 30 May 2019)

022. Dr. Amy Cerato - A Geotechnical Engineer (video, 30 May 2019)

023. "Drilling Operations for Retrieval of Natural Gas" High-resolution Animation (video, 30 May 2019)


Web links:

001. Rock Types with Wikipedia

002. HK DevB List of Approved Piling Contractors - status as of Feb. 19, 2018

003. HK BD search for registered special contractors: SC(F), SC(SF), SC(GIFW)

004. Plaxis 3D - is a finite element package intended for three-dimensional analyses of deformation and stability in geotechnical engineering. It is equiped with features do deal with various aspects of complex geotechnical structures and construction processes using robust and theoretically sound computational procedures.

005. GE05 - geotechnical engineering software


 Topics about Slope Designs, Stability, Stabilisation after Failures / before Potential Failures Geotechnical Investigation, Slope Safety & etc :-

(Disclaimer: Information provided in this section are meant to be as accurate as possible; however, I am not responsible for errors.)

(Information are added sequentially as time goes by; thus, some documents may not be absolutely up-to-date, e.g. the CEDD standard drawings)

0001 Generally speaking, slope failures and landslides are mainly caused by heavy rainfall, water/sewer pipe leakage. Water saturation and high pore water pressure weaken the bonds within the rock & soil masses of the slopes (cut slopes, fill slopes, slopes behind all kinds of retaining walls), causing failures. (March 5, 2016)

0002 High-intensity rainfall of short duration is a major triggering factor for landslides (March 5, 2016).

0003 Definition of Landslide: The movement of a mass of rock, debris, or earth down a slope (March 5, 2016).

0004 In Hong Kong, the wet season (and co-incidentally the most frequent typhoon period) includes second half of May, June, July, August, and September. According to the reports made by the Water Supplies Department, the amount of rainfall during these 4+ months is almost 10 times the total amount of the remaining year. As a result, slope failures and landslides are more likely to occur during the wet season. On the other hand, repair and construction works are best to be done in advance of or after the wet seasons. (March 5, 2016)

0006 Minerals are fundamental components of rocks. They are made up natually with inorganic substances, of specific chemical comprositions, and of orderly repeatative actomic structure. Fundamental crystal structure. (from ISBN: 978-962-02-0381-7) (March 15, 2016)

0007 Silicate minerals are the most abundant components of rocks on Earth's surface. Making up over 90% of Earth's crust. The building blocks are silicon tretroxide, SiO4. . The remaining 10% includes carbonate, oxides, sulphides, phosphates, and chlorides. A few elements may occur in pure form, these include gold, silver, copper, bismuth, arsenic, lead, tellurium and carbon. (from ISBN: 978-962-02-0381-7) (March 15, 2016)

0008 Soil Slopes Stability Analyses (April 20, 2016)

0009 Rock Slopes Stability Analyses (April 20, 2016)

0010 Rock Slope Stablisation Measures Lookup Table (April 20, 2016)

0011 Geotechnical Engineering Office, standard descriptions and symbols for borelog documentation (April 22, 2016)

0012 Rocks and Soils grain size classification (April 30, 2016)

0013 Typical Void Ratio, Moisture Content, and Dry Unit Weight for Some Common Soils (April 30, 2016)

0019 Article: EUROCODE 7: A New Way to Verify a Slope’s Stability (May 12, 2016)

0021 WSD Rainfall Recording Stations - Location Map and Names (June 1, 2016)

0022 GEO Regional Variation in Extreme Rainfall Values in Hong Kong (June 1, 2016)

0024 Geotechnical Parameters for Selected Hong Kong Soils (June 7, 2016)

0025 Scope of Engineer Inspection for Maintenance (June 12, 2016)

0027 Slope Maintenance Manual  -- Checking items required (June 18, 2016)

0028 Soil & Rock Slopes - Typical Preventive Measure - from Geoguide 5 (July 2, 2016)

0029 Frequency of Maintenance Inspections & Requirement for Undertaking Maintenance Works (July 8, 2016)

0030 Finer Divisions between Sand, Silt, and Clay (July 20, 2016)

0031 Thunderstorm (July 21, 2016)

0032 Plate Structure of the Earth and Seismically Active Zones (July 21, 2016)

0033 Ten Tropical Cyclones that Brought the Most Rainfall to Hong Kong (1884-1939, 1947-1999) (July 23, 2016)

0034 Casualties Caused by Tropical Cyclones in Hong Kong: 1960-1999 (July 23, 2016)

0035 Examine Landslides (July 25, 2016)

0036 Triggering Events of Slope Failure (uploaded to this site on 31 July, 2016)

0037 Illustrative Powerpiont showing maths behind Soil Cohesion & Fiction that act against landslide (uploaded to this site on 31 July, 2016)

0038 Factors and Common Misconceptions about Slope Safety (updated to this site on 12 August 2016)

0039 Classifying Landslides by Areas (uploaded to this site on 21 August 2016)