双排桩与竖向锚杆结合的基坑新型支护方法探讨

An Innovative Deep Excavation Support of Combining Double-Row Piles with Vertical Ground Anchors

实际工程中常遇到场地比较狭窄且锚杆又不能施打到用地红线处围的基坑工程,此时比较常见的处理方式有内支撑、斜撑、局部内支撑、双排桩及逆作法。上述几种支护方式不仅施工较为麻烦,而且会影响主体结构施工进度。结合一工程实例介绍一种新型的支护方式。此种支护方式就是将传统的双排桩与锚杆结合起来,仅把水平锚杆调整为竖向锚杆。由于双排桩和锚杆的施工工艺都比较成熟,所以双排桩与竖向锚杆结合的新型支护方法施工也不存在困难。计算时只需做简单换算即可。

Deep excavation supporting projects with the constraint of right-of-way are frequently encountered during the construction.The conventional supporting methods under this situation are：internal support;rakes;partial internal supports,double-row piles and top-down construction.All above mentioned supporting methods are complicated and time consuming.An innovative excavation supporting system is introduced with a project case history.The new supporting system is the combination of conventional double-row pile and vertical ground anchors.The horizontal anchors in the conventional supporting system are switched to the vertical direction.Since the double-row piles and groundwater anchors are conventional construction technique,the construction of the new supporting system can be simplified.