中国岩溶
中國巖溶
중국암용
CARSOLOGICA SINICA
2014年
1期
37-43
,共7页
顾展飞%刘琦%卢耀如%刘之葵
顧展飛%劉琦%盧耀如%劉之葵
고전비%류기%로요여%류지규
红黏土%压缩性%酸碱溶液%铁铝可溶盐溶液%实验研究%桂林市
紅黏土%壓縮性%痠堿溶液%鐵鋁可溶鹽溶液%實驗研究%桂林市
홍점토%압축성%산감용액%철려가용염용액%실험연구%계림시
red clay%compressibility%acid-base solution%iron and aluminum soluble salt solution%experimen-tal study%Guilin City
为探讨水环境对红黏土工程地质性质的影响，以桂林岩溶地区典型地段的红黏土为研究对象，对浸泡于不同浓度的 HCl、NaOH、Fe(NO3)3和 Al(NO3)3溶液中的试样进行固结实验。结果显示：(1)在 HCl 和 NaOH 溶液中浸泡后，红黏土的压缩模量都降低，压缩系数都增大，且溶液浓度越大其值降低或增大的幅度越大；(2)浸泡在 NaOH 溶液中的红黏土的压缩模量比浸泡在 HCl 溶液中的大，且压缩模量值随着溶液浓度的增加而减小，压缩系数则相反；(3)在 Fe(NO3)3和Al(NO3)3溶液中浸泡后，红黏土的压缩模量会随着溶液浓度的增大而增大，压缩系数随着溶液浓度的增大而降低，且 Fe(NO3)3溶液对红黏土的压缩性影响作用比 Al(NO3)3溶液的大。
為探討水環境對紅黏土工程地質性質的影響，以桂林巖溶地區典型地段的紅黏土為研究對象，對浸泡于不同濃度的 HCl、NaOH、Fe(NO3)3和 Al(NO3)3溶液中的試樣進行固結實驗。結果顯示：(1)在 HCl 和 NaOH 溶液中浸泡後，紅黏土的壓縮模量都降低，壓縮繫數都增大，且溶液濃度越大其值降低或增大的幅度越大；(2)浸泡在 NaOH 溶液中的紅黏土的壓縮模量比浸泡在 HCl 溶液中的大，且壓縮模量值隨著溶液濃度的增加而減小，壓縮繫數則相反；(3)在 Fe(NO3)3和Al(NO3)3溶液中浸泡後，紅黏土的壓縮模量會隨著溶液濃度的增大而增大，壓縮繫數隨著溶液濃度的增大而降低，且 Fe(NO3)3溶液對紅黏土的壓縮性影響作用比 Al(NO3)3溶液的大。
위탐토수배경대홍점토공정지질성질적영향，이계림암용지구전형지단적홍점토위연구대상，대침포우불동농도적 HCl、NaOH、Fe(NO3)3화 Al(NO3)3용액중적시양진행고결실험。결과현시：(1)재 HCl 화 NaOH 용액중침포후，홍점토적압축모량도강저，압축계수도증대，차용액농도월대기치강저혹증대적폭도월대；(2)침포재 NaOH 용액중적홍점토적압축모량비침포재 HCl 용액중적대，차압축모량치수착용액농도적증가이감소，압축계수칙상반；(3)재 Fe(NO3)3화Al(NO3)3용액중침포후，홍점토적압축모량회수착용액농도적증대이증대，압축계수수착용액농도적증대이강저，차 Fe(NO3)3용액대홍점토적압축성영향작용비 Al(NO3)3용액적대。
Guilin is located in the southwest of NE-SW trend Xiang-Gui lowland corridor with coordinates of longitude 110°17′and latitude 25°14′.It has a subtropical monsoon climate with abundant annual rainfall,and is hot,humid and rainy.Guilin is in the Lijiang River valley plain,which has well-developed karst and large areas of red clay.The engineering properties of red clay in Guilin are very complex,making the water stabili-ty poor.The chemical activity is closely related with the chemical composition of groundwater.To study the effects of the water environment on engineering geological properties,the red clay was taken from a typical karst area in Guilin.The samples were soaked in different concentration solutions of HCl,NaOH,Fe (NO3 )3 and Al(NO3 )3 .Experimental results showed that:(1)The compression modulus of the red clay de-creased and the compression coefficient increased when it was soaked in different concentration of HCl and NaOH solution,and that the greater the solution concentration was,the larger the decrease in range would be;(2)The compression modulus of the red clay was greater when the red clay was soaked in a solution of NaOH than that soaked in a solution of HCl,and the compression modulus value decreased with the increase of solution concentration,the opposite of the compression coefficient;(3)The compression modulus of the red clay increased and the compression coefficient decreased with the increase of solution concentration when the red clay was soaked in solutions of Fe(NO3 )3 and Al(NO3 )3 ,and the effect of the Fe(NO3 )3 solution was greater than that of the Al(NO3 )3 solution.
