CAJ | 학술논문

工程降水是确保基坑施工安全，防止基坑开挖时由于压差作用产生渗流现象出现流砂、基底涌砂隆起的有效措施之一。以南水北调中线SG6标段基坑降水为例，依据所进行的换填土室内击实实验、野外碾压实验等所得到的实验数据，建立渗流模型，分别在Vensim PLE环境和MATLAB环境下进行模拟。研究了不同工况渗透流量随时间变化的过程，得出了对工程实践具有指导意义的结论，有限时间内的施工降水不会导致大量地下水损失，所产生的影响对距离渠道1500 m以外的地区可以小到忽略不计的程度，供施工单位和工程评价参考。
공정강수시학보기갱시공안전，방지기갱개알시유우압차작용산생삼류현상출현류사、기저용사륭기적유효조시지일。이남수북조중선SG6표단기갱강수위례，의거소진행적환전토실내격실실험、야외년압실험등소득도적실험수거，건립삼류모형，분별재Vensim PLE배경화MATLAB배경하진행모의。연구료불동공황삼투류량수시간변화적과정，득출료대공정실천구유지도의의적결론，유한시간내적시공강수불회도치대량지하수손실，소산생적영향대거리거도1500 m이외적지구가이소도홀략불계적정도，공시공단위화공정평개삼고。
The construction dewatering is one of the effective measures to prevent the harm caused by seepage flow phenomenon w hen foundation pit is excavated ,the seepage phenomenon is generated by the differential pressure to ensure the safety of foundation pit’s construction .In this dissertation , SG6 bid section middle route’s excavation dewatering in the South-to-North Water Diversion Project is taken for example ,establish the seepage flow model and simulate in the environment of Vensim PLE and MATLAB respectively .According to the experimental data obtained by an indoor compaction test and a field rolling test of replacing and filling earth .The seepage flow changes over time with different H is developed by studying the process in order to get some conclusions w hich has big significance for engineering practice . The water pumping has limited effected in ground loss in construction period .The loss of underground water is negligible at the area outside 1 500 m of the channel ,which is useful for further study and engineering evaluation .