A study of site investigation for housing development on hillslopes
Chapter 1 Introduction
A public housing development plan has been launched by the Chief Executive to increase significantly the numbers of public housing units. Hong Kong Housing Authority (HKHA) as the main producer for the public housing units, decided to fasten the redevelopment programme of the existing old estates and requested other government agents, such as Territories Development Department (TDD), Civil Engineering Department (CED), etc. to provide lands for development use. Accordingly, all sources of lands have been allocated to HKHA, including those lands located close to the hillslopes.
Hillslopes are usually in large areas and could be as high as hundred metres in total slope height. The design approach and criteria as well as scope of site investigation to deal with the stability of the hillslopes, are not conventional and require special considerations.
The current housing development projects involving hillslopes are Fanling Area 49A Phase 1 and Phase 3 and Tsing Yi Area 10 Phase 2. Both projects were handled by geotechnical consultants contracted with the HKHA. These two projects are precedence in the Housing Department (HD) for studying hillslopes for housing development. This study aims to conduct independent review on scope of site investigation of these two projects.
The objectives of the study are to summarize the important aspects of site investigation for studying hillslopes, and to develop a cost-effective strategy for site investigation on hillslopes.
1.3 Structure of Thesis
Section 2 presents the statutory requirements and the development stages of public housings, as well the special requirements for those developments near hillslopes. Brief descriptions of two relevant housing projects are introduced.
Section 3 summarizes the categories of landslides in the hillslopes and presents briefly the design approaches for the stability assessment of hillslopes, namely Quantitative Risk Assessment (QRA) and Design Event Method.
Section 4 introduces the conventional site investigation approach based on deterministic slope stability.
Section 5 reviews the employed Consultant's site investigation design approach on two case studies. Presumably, the Consultants has conducted the recent literature review and then employed the most recent approach to conduct the assessment of the hillslopes.
Section 6 examines the conventional site investigation approach on hillslopes through case studies.
The conclusions and recommendations for the study are presented in Section 7.
School:The University of Hong Kong
School Location:China - Hong Kong SAR
Source Type:Master's Thesis
Keywords:slopes soil mechanics china hong kong public housing
Date of Publication:01/01/2001