格构式土钉复合支护的理论与变形研究VIP专享

格构式土钉复合支护的理论与变形讨论格构式土钉复合支护的理论与变形讨论 摘要：将格构与土钉等相结合的格构式土钉复合支护是一种新型护坡方式，该形式能有效地提高基坑的整体稳定性。目前，关于这种支护方式的理论讨论尚不完善。本文结合某基坑工程，以土力学理论和法律规范为基础，通过挡土墙模型、土钉墙理论和支护桩模型验算格构式土钉复合支护稳定性；并用弹性支点法计算极限状态下位移，分层总和法计算基坑瞬时位移，综合两种位移得到最终的坡顶位移为 7.7mm 到 19.75mm 之间，与实测数据较为接近。从而得到针对此支护模式的计算方法理论，为分析讨论同类工程提供参考。 关键词：格构式土钉复合支护；稳定性；土钉墙；弹性支点法；分层总和法 Abstract：Latticed soil nailing support is a new type of revetment structure, which combined lattice support and soil nailing. It effectively improves the global stability of the foundation pit. Currently, the theoretical research about this supporting method is still not consummate. In this paper, on the basis of soil mechanics and code, the stability of latticed soil nailing support are analyzed by the theory of the retaining wall, soil nail and the model of supporting piles. Then calculate the displacement in the limit state by elastic fulcrum method and the instantaneous displacement by layer-wise summation method. The total displacement can be calculated by the combination of the two displacements above, which is between 7.7mm and 19.75mm and close to the measured data. Thus the theory of the calculation method to this supporting model is obtained, offering a reference for the similar projects. Keywords：Latticed soil nailing support；stability；soil nailing；elastic fulcrum method；layer-wise summation method 中图分类号：TU74 一、工程概述 航空工业信息中心科研办公楼位于北京市朝阳区，东临惠新西街，南临北土城路，西临原北关小学，北临惠新西街 33 号航空工业信息中心家属院。基坑东坡支护段毗邻地铁十号线惠新西街南口站...