阶段试验 meaning in English

step-by-step test

The monitoring of cracks of floor slab at construction stage
现浇混凝土楼板裂缝的施工阶段试验研究
In the paper , other research results are summarized , and a big test model indoor of row pile retaining and protecting deep foundation pit is designed . for homogeneous soil or samdwich soil structure three different retaining and protecting kinds : dense pile , thin pile and without pile are designed , using excavation simulation and loading on the top of slope , the model test is divided into two stages : foundation pit excavation simulation stage and destroy test stage . in this paper , for three different retaining and protecting kinds , the relation between soil pressure and displacement of piles , the relation between soil stress and strain , interaction of pile and soil and retaining and protecting loss - stability destroy are systemic studied
本文总结了前人研究成果，构筑大型室内深基坑排桩支护试验模型，在均质及层状土层结构地基上，设计了密排桩、疏排桩及无支护三种不同支护型式，采用模拟开挖与坡顶均布加荷方式，进行了模拟基坑开挖和破坏性的两个阶段试验，对三种不同支护型式的土压力与桩位移、土体应力与变形、桩土共同作用及支护结构失稳破坏进行系统研究。