The surrounding rock of 9300 drift is of plastic soft type. Because of great ground pressure, rock movement and long action duration, the support facilities were destroyed. 9300平巷由于围岩为塑性软岩体,地压、位移大,且持续时间长,因而巷道支架破坏严重。
Some particles are focussing on the neutral region, which is caused by the drift under the action of an electric field along the neutral line. 在沿中性线方向的电场的作用下,中性线周围的部分粒子可以聚集到中性线附近。
Although the former structural design met both the national and Shanghais local codes and regulations. However there are still some non-ideal points need to be optimized, such as big column section, long natural period, large story drift under earthquake action, too much piles, etc. 原设计沿用常规做法,大体上能满足规范要求,但不够理想,例如柱子截面较大,自振周期较长,地震作用时层间位移角也较大,补桩太多等等。
The simplified model and the calculation formula of drift in staggered-truss are presented in this paper for the staggered-truss working under the level load accompanied with the vertical action in the joint. 提出了交错桁架体系在水平荷载作用下的简化计算模型,并给出了在水平均布荷载作用下的内力和侧移的计算方法和算例。
After the oil was spilled into the sea, large amount of oil was removed by physical and chemical methods. However, residual oil pollutants will drift to the bank with the action of wave and tide. 溢油事故后采取的物理、化学应急措施能有效消除大片油污,而残余的石油污染物会在波浪和海流的作用下向岸边漂移。
When the risk approaches, should we let matters drift, not take, or take the positive action and potential achievement? 当风险来临之时,我们是因该听之任之,毫无作为,还是应该积极行动,有所作为。