土工格栅在板桩码头工程中的应用

Application of geogrid in sheet pile wharfs

基于土工原理,提出了一种计算土工格栅复合土体强度指标的分析方法.针对板桩码头工程,在板桩墙后采用以土工格栅为筋材的复合土体进行回填,按照该计算方法确定复合土体的强度,并据此对板桩码头结构进行受力分析.结果表明:在板桩墙后的回填土体中加入土工格栅可以提高复合土体的强度,减小回填土体对板桩墙的主动土压力作用,从而优化板桩码头结构,降低工程造价.实际工程应用表明,在板桩码头板桩墙后采用土工格栅加筋回填土,对减少墙后土压力具有良好的效果.

Based on geotechnical principles, a method for determining the strength indices of compound soils with geogrid is put forward. A sheet pile wharf filled with compound soils, with the geogrid acting as reinforcement material behind the sheet pile wall, was analyzed. The proposed method was employed to determine the strength indices of the compound soils, and the stresses acting on the sheet pile wharf structure were analyzed. The results show that the strength of the compound soils behind the sheet pile wall can be improved by adding geogrid, which can also reduce the active soil pressure of the backfill soils on the sheet pile wall so as to optimize the sheet pile wharf structure and to reduce the construction cost. Engineering cases indicate the efficacy of reducing the soil pressure behind the sheet pile wall by using of the geogrid to reinforce the backfill soils.