The ground stratum is quite complex, with silt layer and fine sand layer mixed, so the construction is difficult to be carried out and the requirement of pit support is strict.
基坑所处地层十分复杂，有较厚的淤泥层和细砂层，基坑支护要求高，施工难度大。
Theory of key stratum in ground control.
岩层控制的关键层理论。
On the other hand, gravel ground condition is a good bearing stratum for piles, which is often met with in civil construction.
另外，卵石地层是土木工程建设经常遇到的地质条件，是桩基良好的持力层。
Detailed study was done in the determination of base bearing capacity, raft stake composite stress analysis, auger ground, bearing stratum stress stretching and pile foundation construction.
对设计中的基础承载力的确定、筏桩复合受力分析、下卧软土、持力层应力扩展、桩基施工等方面进行了较为详细的研讨。
The undue stratum settlement is likely to cause the bad effect to the around environment such as incline of building, rupture of underground pipelines, destroy of ground and Bridges and roads.
当盾构施工引起的地层沉降过大时，可能导致地表建筑物倾斜、地下管线断裂、地面、桥梁、道路等发生破坏，对周围环境产生不利影响。
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。
The ancient collapse is a familiar ill geologic phenomenon in karst region, usually it is unsuitable for direct ground bearing stratum.
古塌陷是岩溶地区的一种常见的不良地质现象，一般不宜作为建筑物地基直接持力层。
Especially, the common nature of stratum movement and under ground pressure influence is not grasped and the information base is not built, therefore the blindness exists.
特别是没有突出岩层运动和矿山压力影响这个共同的本质，没有建立相应的信息基础，存在一定的盲目性。
Based on the key stratum theory in ground control, the basic principle in the design of mining under buildings should ensure that the primary key stratum would not break.
在此基础上，提出将控制覆岩主关键层不破断失稳作为建筑物下采煤设计原则的观点。
The idea of key stratum pressure is put forward, and the ground pressure is mainly influenced by the breakage of key.
提出主关键层来压的新概念，指出回采工作面矿压显现程度主要受主关键层破断的影响。
The idea of key stratum pressure is put forward, and the ground pressure is mainly influenced by the breakage of key stratum.
提出主关键层来压的新概念，指出回采工作面矿压显现程度主要受主关键层破断的影响。
As to stratified foundation, influences of the thickness and embedment depth of soft soil stratum on velocity admittance of block on dual and three layered ground are primarily studied.
对于层状地基，重点研究双层和三层地基上块体导纳曲线受软土层厚度、夹层厚度和埋置深度等的影响。
Methods An inclined tube well collecting percolating ground water with powerful pump in the water-bearing stratum in the depth of 30 meters below the riverbed of Huanghe River was built.
方法打斜管井深入黄河河床以下30 m处，以大功率水泵抽水，经加氯消毒后供生活饮用。
Methods An inclined tube well collecting percolating ground water with powerful pump in the water-bearing stratum in the depth of 30 meters below the riverbed of Huanghe River was built.
方法打斜管井深入黄河河床以下30 m处，以大功率水泵抽水，经加氯消毒后供生活饮用。
应用推荐