深圳市南山区后海片区风化深槽的岩土特性研究

STUDY ON GEOTECHNICAL CHA RACTERISTICS OF WEATHERED DEEP TROUGH IN HOUHAI AREA,NANSHAN DISTRICT,SHENZHEN CITY

深圳市南山后海片区揭露有地下埋深50 m到160 m不等的花岗岩风化深槽,为研究深槽区内外岩土特性的差异,通过钻孔数据分析风化深槽内外的岩土体物理力学参数,主要包括土体密度、土体含水性、土体孔隙性、土体压缩性、土体可塑性和岩体的抗压强度,发现风化深槽区内岩土特性较差,且物理力学参数随着深度变化规律也较复杂。结合风化深槽区内的岩芯构造特征分析,发现断层发育是造成该区域内风化深槽区岩土体的工程性质较差的主要原因。研究可为风化深槽区内的工程建设提供依据。

In the Houhai area of Nanshan,Shenzhen,there are granite weathered deep troughs with underground depths ranging from 50 m to 160 m.It mainly includes soil density,soil water content,soil porosity,compressibility,soil plasticity and rock compressive strength.Also more complicated.Combined with the analysis of the structural characteristics of the core in the weathered deep trough area,it is found that the development of faults is the main reason for the poor geotechnical engineering properties in the weathered deep trough area.The research can provide a basis for engineering construction in the weathered deep trough area.