Its capacity of resisting large external load enables it not to rely on lateral support of the soil, therefore its requirements on backfilling soil is lower than on flexible tubes.
由于它本身能抵抗较大的外荷载，使其不须依赖土壤的侧向支撑，因而对回填土要求较柔性管低。
2
Under the effect of load, the settlement of subgrade will lead to the lateral distortion of soft soil.
在桥头路基荷载的作用下，地基发生沉降，软土会发生一定的侧向变形。
3
Based on elastic theory and assumption that there is embedded deformation between pile and soil, the deformation and load of pile under lateral load are analyzed.