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软土地基的土质具有粘性大，透水性差，含水量大，承载力低，沉降量大，土层结构复杂等特点。
The soft soil is featured by big viscosity, bad water permeability, big water content, low bearing capacity, big settlement and complex soil layers.
排水固结法的加固原理是将排水板材料按一定间距垂直方向打入软土中，当地基上部施加预压荷载后，淤泥土中的水在超静水压力的作用下随即渗入毗邻的排水板并排出地面。所以，应用排水板可加速软土固结，使地基土迅速完成沉降，提高了地基的稳定性和承载力。这样大大缩短了施工期，减少了工后沉降，可有效地保证构筑物施工期的稳定性和运用期的正常工作。
As for the drainage consolidation method, band drains are driven vertically into the soft soil at certain intervals. After the subsoil has beenpreloaded, water in muddy soil will pass into the adjacent band drain and flow out of the ground under the excess hydrostatic pressure.Therefore the consolidation and settlement of soft soil can be quickened,improving the stability and bearing capacity of foundation. Through thismethod, the construction period can be shortened dramatically, the post-construction settlement can be reduced, and the stability of syuctre during construction and the normal operation can
be ensured effectively.
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