排序方式: 共有6条查询结果,搜索用时 15 毫秒
1
1.
2.
雅砻江锦屏一级水电站坝址区实测地应力与重大工程地质问题分析 总被引:1,自引:0,他引:1
本文对雅砻江锦屏一级水电站坝址区Ⅱ1-Ⅱ1及其前后剖面实测地应力进行了系统整理分析。分析结果表明:在相同的水平和垂直埋深条件下左岸坡角应力大小较右岸坡角小,这主要是由边坡岩体结构确定的;左岸导流洞开挖过程中在应力大小较右岸低的情况下出现坍塌工程地质问题也与左岸边坡岩体结构有关,而非岩爆等诱发。另外对左岸岩体深部裂缝在已有研究成果的基础上从应力集中、能量积累角度初步提出了新的边坡变形破坏方式,并从岩体结构和地应力大小方面对锦屏一级水电站工程建设过程中左、右岸应注意的工程地质问题提出了初步建议。 相似文献
3.
4.
In this paper an analysis of the present stress field near the Meiling arcuate faults in Beijing area is made. Based on the in situ stress measurements, petrofabric analysis and model experiments, it has been found that this local stress field is a rotational shear stress field. It has been active from the late Yenshanian up to the present with the outer side rotating clockwise. The features of the local stress field are different from those of the present regional stress field characteristic of the Neocathaysian system. The trajectories of the maximum principal compressive stresses of the former show an arcuate pattern converging towards SE and diverging towards NW. However, those of the latter extend approximately in the NWW direction. 相似文献
5.
有机固体废物进行多组分协同厌氧发酵可以产生清洁能源气体,从而达到资源化处理的目的.本文通过设置不同进料有机负荷及回流比,分析餐厨垃圾协同水葫芦厌氧产氢过程中产气量、氢气含量、SCOD、挥发性脂肪酸(VFAs)、pH及氨氮(NH+-N)各参数的变化.结果显示,高有机负荷和高回流比会导致系统的VFAs累积,使系统pH值降到5.0以下;进料有机负荷对于餐厨垃圾协同水葫芦厌氧产氢的影响更大,系统内的氨氮浓度及SCOD浓度均与进料有机负荷呈正相关;当进料有机负荷为10 kg·m-3·d-1、回流比为30%时,系统产氢效果最好,累计产气量为80 946 m L,氢气含量为35.83%.本研究结果可为有机固体废物资源化处理提供参考. 相似文献
6.
1