A wall is only as good as its foundation, and all retaining walls should be built on structurally sound, compacted foundation sub-base material.
墙只是作为一个良好的基础，而应建立在所有挡土墙结构健全，基础压分的物质基础。
This paper reformed the DTC-199 Type-torsional cyclic load triaxial apparatus, it can better simulate complex initial stress conditions of compacted loess foundation or sub-grade.
本文通过对DTC-199型周期扭转荷载三轴仪进行简单的改造后，可以较好的模拟压实黄土地基或路基在受到循环动荷作用前所处的复杂初始应力状态。
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