城市中心区域深基坑支护技术

DEEP FOUNDATION PIT SUPPORT TECHNOLOGY IN THE CENTRAL AREA OF THE CITY

位于城市中心区域的基坑支护工程工况通常较复杂,容易受到地下水、周边建构筑物、地下管线、外围道路等的影响,基坑失稳造成的后果较严重。为保证施工安全,灌注桩排桩支护是一种较常用的支护方式,强度、刚度、稳定性好,适用性强,并结合内支撑、腰梁、锚杆等增强支护体系的整体性,对于变形要求特别高和施工条件苛刻的地方则采用双排桩支护,严格限制土体的位移。

The working condition of foundation pit supporting engineering located in the central area of city is often complex.Such as groundwater,surrounding structures,underground pipelines,peripheral roads,etc.,instable foundation pit leads to serious consequence.In order to ensure construction safety,cast-in-place piles in row supporting method is commonly used.Its advantages are high strength,stiffness,good stability,strong applicability.The integrity of the support system is further enhanced by internal support,waist beams,anchor bolts.For the places which require particularly small deformation,harsh construction conditions and strict limitation of the soil displacement,double row piles support is adopted.