论文部分内容阅读
一、前言土工建筑物的填筑标准一般是根据击实曲线,取其最大干容重γdmax及相应的最优含水量ωop作为标准。然后取某一压实度相应的干容重γd及最优含水量ωop测定其渗透系统、抗剪强度及压缩性等力学性指标。填土的某些力学性质在施工完成之后,往往随时间得到不同程度的改善。对于膨胀性土料,由于遇水后膨胀,含水量及孔隙比增大.引起强度降低、渗透系数增大以及坝面向上隆起,因此设计人员遇到这种土料往往谨慎从事。
First, the preface Geotechnical building filling standards are generally based on the compaction curve, whichever is the maximum dry bulk density γdmax and the corresponding optimal water content ωop as a standard. And then take a compaction degree corresponding dry bulk density γd and optimal water content ωop determination of its permeability system, shear strength and compressibility and other mechanical indicators. Some of the mechanical properties of fill are often improved to varying degrees over time after construction is completed. For expansive soil, designers often encounter this type of soil with care due to expansion after water contact, increased water content and void ratio, reduced strength, increased permeability, and uplift of the dam surface.