深基坑复合土钉支护受力机理分析

Analysis of force action mechanism of composite soil nailing in deep excavation

由于对复合土钉支护受力机理不十分清楚,使得设计的边坡存在一定缺陷。为了从本质上更深刻地理解复合土钉支护结构,本文在室内试验的基础上,对土钉与水泥土止水帷幕复合支护型式的受力机理进行了详细的分析,得到该支护型式与普通土钉支护型式的本质区别:土钉与水泥土止水帷幕之间有一个力的传递过程,该传递过程是土钉与水泥土止水帷幕协同工作的表现。

A design of slope supported by composite soil nailing has some defects because the force action mechanism of composite soil nailing is not extremely understood. Base on the indoor test, the detailed analysis of force action mechanism of composite soil nailing systems composed of soil nails and waterproof cement-soil mixing pile wall is made in order to grasp the essence of composite soil nailing. The essential distinction of composite soil nailing systems and common soil nailing systems is： there has one course of the transfer of force between the soil nails and the waterproof cement-soil mixing pile wall. The working mechanism of the soil nails work in coordination with the waterproof cement-soil mixing pile wall in the composite system has been shown by the transfer course.