The flake crack initiated in surface layer and developed in subsurface stratum.
剥落裂纹起源于表面，在亚表层中扩展；
The flexural fatigue property of steel fiber reinforced concrete material for the pavement surface stratum is investigated experimentally.
对路面用钢纤维混凝土材料的弯曲疲劳进行了试验研究。
Research of static correction method and investigation technology about the surface stratum structure of huge thick gravel area of front-zone of mountain.
山前带巨厚砾石区的表层结构调查技术及静校正方法研究。
In order to solve this problem, integrative reconstruction of non-continuous stratum surface was proposed.
针对该问题，提出了一种非连续地层界面整体重构方法。
Under stratum condition of thick soil layer, we can study it as random medium and use probability integral method to estimate surface movement.
在厚松散层地层结构条件下，可将其视为随机介质，采用概率积分法预计地表移动变形。
In order to limit the sink of surface and maintain the stratum stable, it's necessary to do pre-support and consolidation, when tunnels would be constructed in soft or weak geology stratum.
在软弱松散或不良地质地层中以及在城市地铁中修建隧道时，为了能够有效地限制地面沉陷，并全面地保持地层处于稳定状态，需要对地层进行超前预支护加固。
The model stratums mainly included miscellaneous filling soil surface, interaction stratum of silty clay, silt and fine sand and pebble round gravel at the bottom of station tunnel.
模型介质材料分别模拟地表杂填土层，粉质黏土、粉土、粉细砂互层和车站隧道底部的卵石圆砾层；
Ground surface subsidence for the instability of key stratum and its instability conditions are quantitatively analyzed. The result is practical in engineering.
定量地分析了关键层失稳时的下沉量以及关键层的失稳条件，具有工程应用价值。
Ground surface subsidence for the instability of key stratum and its instability conditions are quantitatively analyzed. The result is practical in engineering.
定量地分析了关键层失稳时的下沉量以及关键层的失稳条件，具有工程应用价值。
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