水平基床系数的影响因素分析

Analysis of influencing factors on horizontal foundation modulus

水平基床系数是在计算深基坑的变形、支护结构的稳定性,以及桩在水平荷载下的位移、内力等方面有重要意义的参数。由于技术上的问题,它也是一个比较难确定的参数。结合在南京地铁南北线一期工程、苏通长江公路大桥等大型工程的工程地质资料,就土的类别、含水量、密实度、压缩性、埋深、应力水平和状态、土和结构物的相互作用,以及测试方法等对水平基床系数的影响进行了初步的分析,这些因素在共同作用的同时,也相互作用、相互影响。

Horizontal foundation modulus is an important parameter in calculating the deformation of deep excavation project, evaluating the stability of the retaining structure. It also plays an important role in calculating the displacement and the internal force of piles under horizontal loading. In addition, due to technical limitation, horizontal foundation modulus is difficult to determine. Combined with data obtained from Nanjing Underground and Sutong Yangtze Bridge, it is discussed that these factors influence horizontal foundation modulus as well as the test methods to measure this parameter and their influenceon on the outcome.