连拱内支撑支护结构工程应用实例

Application of the Supporting Structure with Double-Arch and Support within Foundation

将水泥土连拱结构与内支撑复合构成基坑支护体系.通过水泥土桩的拱状排列形成较大空间刚度,在水平土压力作用下可将一部分土压力直接传至深部土层,减小作用于支护结构上的土压力;另一方面,拱壁材料基本上以受压为主,可充分发挥水泥土的强度特性.且支护体系不占用坑外地下空间,施工过程无需较大坑内空间.具有止水支护双重功效,为条形深基坑工程提供了一种支护新方法.

This paper will be pit support system of composition with soil-cement-arch structure and of support within the foundation. Through larger space stiffness of arch-shaped formation of the piles of soilpcement, it can be directly passed to the deep soil in the level of soil under the pressure of earth pressure, reduce the soil pressure of the supporting structure;on the other hand,arch-wall basically, the main material to pressure, can fully play the strength of soil-cement. And the support system is not occupation under out-space, the construction without more pit space. It has double effect of sealing and support, and provides a new method of support.of deep excavation works for the strip.