土木建筑与环境工程
土木建築與環境工程
토목건축여배경공정
Journal of Chongqing Jianzhu University
2015年
4期
112-117
,共6页
水泥土%污水%水泥掺量%抗压强度%抗剪强度
水泥土%汙水%水泥摻量%抗壓彊度%抗剪彊度
수니토%오수%수니참량%항압강도%항전강도
cemented soil%polluted water%cement content%compressive strength%shear strength
由于多数地下水泥土工程直接与地下腐蚀性介质环境接触，必将导致水泥土材料的逐步劣化甚至失效破坏。以某市区工地附近明渠排放的污水作为侵蚀性介质，制作了不同水泥掺量的水泥土试件，通过对比试验，研究了污水环境和清水环境下不同水泥掺量、不同龄期的水泥土抗压强度和抗剪强度。结果表明，在污水或清水环境下，相同水泥掺量水泥土30 d 龄期的抗压强度几乎相等，随着龄期的增加其抗压强度均逐步增大，但污水环境下其抗压强度增长的幅度明显小于清水环境，90 d 后清水环境的水泥土抗压强度不再增长，而污水环境的抗压强度开始降低；污水环境和清水环境下的水泥土内摩擦角和黏聚力随龄期、水泥掺量的增加均逐步增大，污水环境下龄期90 d后的内摩擦角和黏聚力均开始降低。
由于多數地下水泥土工程直接與地下腐蝕性介質環境接觸，必將導緻水泥土材料的逐步劣化甚至失效破壞。以某市區工地附近明渠排放的汙水作為侵蝕性介質，製作瞭不同水泥摻量的水泥土試件，通過對比試驗，研究瞭汙水環境和清水環境下不同水泥摻量、不同齡期的水泥土抗壓彊度和抗剪彊度。結果錶明，在汙水或清水環境下，相同水泥摻量水泥土30 d 齡期的抗壓彊度幾乎相等，隨著齡期的增加其抗壓彊度均逐步增大，但汙水環境下其抗壓彊度增長的幅度明顯小于清水環境，90 d 後清水環境的水泥土抗壓彊度不再增長，而汙水環境的抗壓彊度開始降低；汙水環境和清水環境下的水泥土內摩抆角和黏聚力隨齡期、水泥摻量的增加均逐步增大，汙水環境下齡期90 d後的內摩抆角和黏聚力均開始降低。
유우다수지하수니토공정직접여지하부식성개질배경접촉，필장도치수니토재료적축보열화심지실효파배。이모시구공지부근명거배방적오수작위침식성개질，제작료불동수니참량적수니토시건，통과대비시험，연구료오수배경화청수배경하불동수니참량、불동령기적수니토항압강도화항전강도。결과표명，재오수혹청수배경하，상동수니참량수니토30 d 령기적항압강도궤호상등，수착령기적증가기항압강도균축보증대，단오수배경하기항압강도증장적폭도명현소우청수배경，90 d 후청수배경적수니토항압강도불재증장，이오수배경적항압강도개시강저；오수배경화청수배경하적수니토내마찰각화점취력수령기、수니참량적증가균축보증대，오수배경하령기90 d후적내마찰각화점취력균개시강저。
The majority of underground cemented soil projects contact with underground corrosive medium environment directly,which will lead to the deterioration of cemented soil material gradually or even failure.The discharged polluted water from the open channel near construction site is used as a kind of corrosive medium to produce test pieces of cemented soil with different cement content.In both polluted water environment and clean water environment,the compressive strength and shear strength of cemented soil with different cement content and different ages are compared.The results show that when the age is 30 days,compressive strength of cemented soil with the same cement content is almost the same in polluted water environment and clean water environment. Compressive strength of cemented soil gradually increases with the increase of the age.However,the increase extent of compressive strength in polluted water environment is significantly less than that in clean water environment.After 90 days,compressive strength of cemented soil no longer increases in clean water environment, and compressive strength begins to decrease in polluted water environment.The internal friction angle and the cohesion of cemented soil gradually increase with the increase of the age and cement content in polluted water environment and clean water environment.The internal friction angle and the cohesion begin to decrease in polluted water environment after 90 days.
