根据勘察的资料和实地踏勘，针对实际情况将基坑侧壁分为五个剖面进行支护的设计.doc

CAD图的建议：1、加图签；2、正式出图前，用电脑虚拟打印出来，看看里边字体大小是否合适。我感觉字都很小，除非出图很大才能看清。 摘要 拟建建建筑物由两幢主楼和裙房组成，现地面标高约为54.5m，基坑长约215m，宽约190m，周长约为800m，基坑开挖深度约8.0m，本次设计是根据勘察资料和实地踏勘，针对实际情况将基坑侧壁分为五个剖面进行支护设计。采用护坡桩加锚索及复合土钉墙的基坑支护形式，在护坡桩之间施工高压旋喷桩与护坡桩搭接形成止水帷幕，部分剖面采用水泥搅拌桩做止水帷幕。 复合土钉墙设计中，利用水泥搅拌桩做止水帷幕，土压力计算采用水土合算。并由此进行止水帷幕的抗渗设计和土钉墙参数设计，最后对土钉墙的局部稳定性、内部整体稳定性和外部整体稳定性进行了验算。由于验算较繁琐，本设计采用理正软件进行的验算。 排桩支护设计中，利用高压旋喷桩与护坡桩搭接形成止水帷幕，土压力计算采用水土合算。由此进行止水帷幕的抗渗设计和护坡桩及锚索的设计，最后进行整体稳定性验算，抗隆起稳定性验算，渗透性稳定性验算。由于周围有是重要建筑物，基坑的变形要求严格，监测变形很重要。 关键词： 基坑支护 复合土钉墙 护坡桩 高压旋喷桩 止水帷幕 Abstract The design is based on the survey data and field reconnaissance, in view of the actual situation is divided into five sections. The slope protection pile and anchor cable and composite soil nail wall bracing structure of foundation pit, slope protection pile construction in between the high pressure jet grouting pile and pile water stop curtain lap formation, section profile with cement mixing pile as waterproof curtain. Composite soil nail wall design, use of cement mixing pile with soil economical as waterproof curtain, soil pressure calculation. Anti seepage design and parameters of soil nailed wall design and thus to the waterproof curtain, the local stability of soil nailing wall, the internal stability and external stability checking. Because the calculation is relatively complex, checking the design using the software of. Row pile supporting design, use of high pressure jet grouting pile and pile waterproof curtain formed by overlapping, cost-effective to calculate the soil pressure of soil. Anti seepage design and design of slope protection pile and anchor the waterproof curtain, finally carries on the overall stability checking, anti heave stability, permeability and stability checking. Because there are important buildings, foundation pit deformation requirements strictly, is very important to monitor the deformation. Keywords: foundation pit composite soil nailing wall slope protection pile high pressure jet