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。
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.
介绍了用于减小压杆计算长度的侧向支撑的强度和刚度设计要求。
The stiffness and strength requirements for the lateral bracings reducing the calculation length of the compression struts are introduced.
小曲率和严重倾斜的支撑能在只允许切线运动的支撑上引起过度的侧向热力。
Sharp curvature and sharply skewed supports can cause excessive lateral thermal forces at supports if only tangential movement is permitted.
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