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针对传统的支护结构土压力计算存在的缺陷,介绍了一种新型复合桩墙支护技术和特点,当基坑支护深度较大或需对基坑及周围环境变形进行严格控制时,可对桩墙顶部采用预应力斜锚、桩墙中部采用锚杆、预应力锚杆等技术配合支护,具有止水挡土双重作用,介于刚性重力式挡墙和柔性悬壁桩墙间的一种属半刚性、半柔性支护结构。实例结果表明,该支护经济实用,有较高的推广应用价值。
Aiming at the defects of traditional earth pressure calculation of support structure, a new type of composite pile wall support technology and its characteristics are introduced. When the depth of foundation pit support is large or the deformation of foundation pit and the surrounding environment needs to be strictly controlled, Prestressed inclined anchors are used on the top of the pile wall. The middle part of the pile wall is supported by technologies such as anchor bolts and prestressed anchors, with the function of water stop and retaining, which is between the rigid gravity retaining wall and the flexible cantilever pile wall A semi-rigid, semi-flexible support structure. The results of the example show that the support is economical and practical, and has a high popularization and application value.