基于ANSYS的岩溶地区桥梁桩底持力层厚度分析

Analysis on Thickness of Bearing Stratum at Bottom of Bridge Pile in Barst Area Based on ANSYS

在岩溶发育地区桥梁设计和施工过程中,经常遇到端承桩桩端持力层厚度不足的问题。目前交通部有关规范及各个地方标准中,有对桩端持力层厚度进行相应要求,但并无统一标准,同时也没有给出持力层厚度计算的有效方法。通过实际的工程案例,对桩端持力层厚度与溶洞跨度以及桩基入岩深度之间的关系进行分析,为以后类似工程有关桩底持力层厚度的判定提供一些思路和借鉴。

In the design and construction of the bridges in karst developing areas, the problem of insufficient thickness of bearing stratum at the end of end bearing pile is often encountered. At present,the thickness of the bearing stratum at the pile end is relevantly required in the relevant specifications of the Ministry of Communications and various local standards, but there is no unified standard, and there is no effective method for calculating the thickness of the bearing stratum. Through the practical engineering cases, the relationship between the thickness of pile-end bearing stratum and the span of karst cave and the depth of pile foundation into rock is analyzed, which provides some ideas and reference for the determination of the thickness of pile-bottom bearing stratum in the similar projects in the future.