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河网地区的淤泥层一般较厚,强度较低,在这些地区新建或扩建码头时需对边坡进行大面积的开挖、换填,工程造价高,采用卸荷式板桩墙高桩梁板码头结构可以很好地解决,但目前关于这种码头结构型式的土压力计算研究非常少。借鉴遮帘板桩码头的土压力计算方法,分析探讨了该新型结构的土压力计算方法。计算中对结构进行分区处理,利用非极限状态土压力理论计算板桩河侧及灌注桩陆侧的土压力,同时考虑土拱效应和卸荷板的卸荷作用,以及平行墙理论,推导计算板桩陆侧及灌注桩河侧的土压力,最后将简化计算结果与离心模型试验结果及有限元数值分析结果进行对比,对比分析表明,该简化计算方法有一定的可行性,可供工程设计参考。
In the river network, silt layers are generally thicker and have lower strength. When new or expanded wharves are to be built in these areas, large-scale excavation and replacement of slopes are needed, and the project cost is high. The structure of the wharf can be well solved, but there is very little research on the earth pressure calculation about this wharf structure. With reference to the calculation method of earth pressure at the curtain of the piles and piles, the earth pressure calculation method of the new structure is analyzed and discussed. In the calculation, the structure is partitioned and the earth pressure on the side of the pile and the landfill side of the pile are calculated by using the theory of the soil pressure in the non-limit state. The soil arching effect and the unloading action of the unloading plate are considered, and the parallel wall theory is deduced The earth pressures on the side of the piles and on the river side of the bored pile are compared. Finally, the simplified calculation results are compared with those of the centrifugal model test and the finite element numerical analysis. The comparative analysis shows that the simplified calculation method has some feasibility and is available for engineering design reference.