风化花岗岩地区嵌岩桩嵌岩深度计算方法

The Depth Calculation of Rock-Socketed Pile in Weathered Granite Region

嵌岩桩以高承载力低沉降等诸多优点被广泛应用在土木工程行业。在湖南公路桥梁工程中会大量存在以风化花岗岩为持力层的嵌岩桩工程。针对上述特殊情况,本文首先简要介绍了最佳嵌岩深度研究现状,同时简要分析了花岗岩以及风化花岗岩的一些基本工程特性,并根据风化花岗岩工程特性给出了岩体风化程度的垂直划分公式。利用岩体风化程度垂直划分公式同时结合桩岩耦合一体模式得出嵌岩段桩侧极限侧阻力大小。最后根据桩身稳定计算方法 ,以风化花岗岩破坏为判据可计算出最佳嵌岩深度。整个计算过程充分考虑了风化花岗岩的工程性质,并与实际情况相似,具有一定的工程实际意义。

Rock-socketed pile with high bearing,low settlement and many other advantages is widely used in the civil engineering industry.Weathered granite bearing stratum of Rock-socketed pile engineering frequently exists in Hunan road and bridge engineering.In response to these exceptional circumstances,this article briefly describes the best Rock-socketed depth research recently and gives a brief analysis of some basic engineering properties of granite and weathered granite.Based on the basic engineering properties of granite and weathered granite,we can get the vertical division formula.Combining the formula and pile-rocks coupling mode,the ultimate lateral resistance of rock-socketed pile side paragraph will be received.Finally,according to the calculation method of pile stability as well as the weathered granite destruction criterion,we can calculate the optimum depth of rock-socketed.The entire calculation process fully consider the engineering properties of weathered granite and the result which has a certain practical significance is similar to the actual situation.