带有超前微桩土钉墙的内部稳定性的探讨

超前微桩已在软弱地基的基坑支护中得到广泛应用。而目前对土钉墙设计而言 ,往往把超前微桩作为一种安全储备 ,没有考虑超前微桩对土钉墙内部稳定性所起的作用 ,设计理论已滞后于工程实践。因此 ,从带有超前微桩的土钉墙破坏形式及其计算方法出发 ,编制了能够计算带有超前微桩的土钉墙内部稳定系数的程序 ,并且用工程实例进行验证 ,认为在软弱土层中打设超前微桩可以增加土钉墙内部稳定性。

STUDY ON INTERNAL STABILITY OF SOIL-NAILING WALL WITH LEADING MINI-PILE

With the characteristics such as simplification,promptness,decreasing the deformation of soil,increasing the stability of an excavation,leading mini- piles have been widely used for excavations in soft soil.But for the design of soil- nailing retaining wall with leading mini- piles,the role of leading mini- piles in the internal stability of soil- nail retaining wall is always neglected and design theory has been lagged behind engineering practice.Based on the failure pattern of soil- nail retaining wall with leading mini- piles and its calculation method,the program for calculating internal stability of soil- nail retaining wall with leading mini- piles has been designed.The developed program has been verfied effectively by engineering practice.