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深圳后海一带,基岩面高程最大-169.2m,风化岩层厚度达164.2m,风化岩的划分是工程勘察的重点。通过列举对比同一场地上不同的工程地质勘察资料,指出巨厚层风化岩分层原则宜为现场鉴定与标准贯入相结合,对其他工程勘察具有参照作用;通过邻近工程试桩资料分析,指出岩土参数的选取可按照现行深圳市标准并有所调整;通过分层、分区统计及沉降分析,给定桩端持力层建议,对本工程设计具有实际意义。
The area of Houhai in Shenzhen has the highest bedrock surface elevation of -169.2m and the thickness of weathered rock formation reaches 164.2m. The division of weathered rock is the focus of engineering investigation. By comparing and contrasting different engineering geologic survey data on the same site, it is pointed out that the principle of stratification of the thick and thick layer of weathered rock should be the combination of on-site identification and standard penetration, which has reference to other engineering investigation. According to the analysis of pile-loading data of the adjacent project, The selection of geotechnical parameters can be adjusted according to the current standards of Shenzhen. By stratification, zoning statistics and settlement analysis, it is practical to design a bearing layer of the pile at the end of the pile.