DEVELOPMENT AND NEW CHALLENGES OF DEEP EXCAVATION SUPPORTING ENGINEERING IN GUANGDONG PROVINCE
YANG Guanghua1，2
(1. Guangdong Research Institute of Water Resources and Hydropower，Guangzhou，Guangdong 510610，China；
2. The Geotechnical Engineering Technology Center of Guangdong Province，Guangzhou，Guangdong 510610，China)
Abstract：The diversity of geological conditions determines the variety of the pit supporting engineering in Guangdong. Thus，different kinds of supporting patterns are used in Guangdong，which are rare in our country. Some new progresses and understandings are introduced in the paper，including the impact of precipitation on the surrounding environment and ways to deal with it，analysis of some different treatments with different results on the water in the bottom of pits and reasonable treatments，problems and countermeasures of the lateral displacement of piles generated by earthwork excavation in soft soil. Except that，some new and successful supporting types and the applications of the double-row piles method，top-down method and mid-island method are also discussed. Finally，the further study of some theoretical issues are proposed in the practice of pit supporting engineering，such as reasonable calculation of the force of prestressed anchor cable，the calculation mode of earth pressure，control of the pit displacement，reasonable supporting patterns in the deep soft soil and water and earth pressures in the residual soil. All these new and challenging scientific problems require further research.
杨光华1，2. 广东深基坑支护工程的发展及新挑战[J]. 岩石力学与工程学报, 2012, 31(11): 2276-2284.
YANG Guanghua1，2. DEVELOPMENT AND NEW CHALLENGES OF DEEP EXCAVATION SUPPORTING ENGINEERING IN GUANGDONG PROVINCE. , 2012, 31(11): 2276-2284.
周红星，曹 洪，尹小玲，等. 西溪电站厂房基坑承压水降压研究及实现 岩土力学，2004，25(增)：531-535.(ZHOU Hongxing，CAO Hong，YIN Xiaoling，et al. Research on pressure-relief of confined water in foundation pit for powerhouse of Xixi Channel Power Plant and practice[J]. Rock and Soil Mechanics，2004，25(Supp.)：531-535.(in Chinese))
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2012, Vol. 31 
