1·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·Consequently the bedding and backfilling of the trench need special attention to provide the required lateral support.
其后，管道沟的垫土和回填需要特别注意，应提供所需要的水平支撑。
3·Based on shield construction in Guangzhou Metro and Shenzhen Metro, an introduction is given to various types of backfilling grouting behind segment, and a comparison was made.
结合广州地铁和深圳地铁的盾构工程实例，介绍盾构施工中的管片壁后回填注浆的多种类型并作了比较分析。
4·At the same time, liquid coal ash is used in backfilling of abutment, so as to reduce the load and basic stress, reduce settlement and increase the dense of fillings.
同时，为降低桥头地基的荷载和基础应力，减少沉降并增加填料的密实度，台背回填采用液态粉煤灰填筑。
5·However, in large open pits, traditional methods such as planting, slope cutting and backfilling are not suitable for restoring the ecological environment.
对于在生产、规模较大的露天采场，不能采用削坡回填、覆土种植等简单的传统方法恢复矿山生态环境。