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预应力锚杆(索)以拉固桩墙的形式作为临时或永久性支护结构的重要组成部分,在深开挖工程中的应用是最为普遍的,工程效果十分显著。它可以明显地减小支护结构尺寸,节约工程材料,加快工程进度。 1 锚拉桩墙设计中的一些问题 1.1 桩墙形式的选择为了保持基坑或其它开挖工程的稳定和避免过大的位移,对于锚拉桩墙,可以采用不同的桩墙系统和支承方法。应根据不同墙桩的特性、深开挖工程的地质条件、埋深和周边条件,选择适宜的桩墙形式。综合国内的深开挖工程,锚拉桩墙的形式主要有:钢板桩、H型钢桩、现浇钢筋混凝土桩、地下连续
Prestressed anchors (cables) are used as the important part of temporary or permanent support structures in the form of wall-fixed piles. Their application in deep excavation works is the most common and the project results are very significant. It can significantly reduce the size of the support structure, save engineering materials, and speed up the progress of the project. 1 Some Problems in the Design of Anchored Pile Walls 1.1 Selection of Forms of Pile Walls In order to maintain the stability of foundation pits or other excavation works and avoid excessive displacements, different pile wall systems and supporting methods can be used for anchoring piles. . According to the characteristics of different wall piles, the geological conditions of the deep excavation project, the depth of burial, and the surrounding conditions, the appropriate type of pile wall should be selected. Comprehensive domestic deep excavation works, the form of the anchored pile wall includes: steel sheet piles, H-shaped steel piles, cast-in-place reinforced concrete piles, underground continuous