Design of Foundation Pit Support under Complex Geological Conditions——Taking Heguanying Inverted Siphon of Water Diversion Project in Central Yunnan as an Example
The total length of the Heguanying inverted siphon is 1 186 m,using a backfill buried pipe form.The 158 m long pipeline behind the inverted siphon is placed in a saturated sandy soil layer,with a shallow groundwater level and seismic liquefaction issues in the foundation.And this section of the route passes through Dongcheng Village,with some surrounding houses less than 20 meters away from the excavation pit.The excavation of the foundation pit faces the stability of the saturated sandy soil excavation slope,and the groundwater level drops during the construction period,which affects the stability of the surrounding building foundation.To ensure the stability of the foundation pit and the safety of buildings on both sides during the construction period,the design combines anti-seepage and support of the foundation pit.After scheme comparison,steel sheet pile support form is selected.This paper mainly introduces the design scheme comparison and structural settlement results of Heguanying inverted siphon steel sheet pile support.
万方数据
维普
