临江深基坑工程TRD落底式止水帷幕效果研究  

Study on the Effectiveness of TRD Ground Improvement Method for Deep Foundation PitAlong the River

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作  者:方毅 王刚 张双龙 臧中华 Fang Yi;Wang Gang;Zhang Shuanglong;Zang Zhonghua(China Construction Eighth Bureau General Contracting Construction Co.,Ltd.,Shanghai 200135,China)

机构地区:[1]中建八局总承包建设有限公司,上海200135

出  处:《黑龙江科学》2025年第4期144-146,共3页Heilongjiang Science

摘  要:临江深基坑施工受地下水影响较大,基坑支护采用TRD落底式止水帷幕能显著降低涌水量。结合工程实例,总结了临江区域(武汉地区、地下水位高)基坑围护止水措施为TRD止水帷幕入分化岩层,形成封闭止水层,分析此工况下的基坑止水效果,通过分析工程实际的涌水量与设计量、对基坑降水井及降水量的设计优化、实际地下水位和降水监测,得出临江深基坑的TRD落底式止水帷幕能显著减少涌水量,修正过后的实际止水系数为28.9%,与设计的40%存在一定差距,可为相关工程提供参考。The construction of deep foundation pits near the river is greatly affected by groundwater.The adoption of TRD bottom-sealing water-stop curtain for foundation pit support can significantly reduce the water inflow.The study combines with engineering examples,summarizes the water-stop effect of foundation pit in the area near the river(Wuhan area with high groundwater level),where the water-stop measure of foundation pit enclosure is that the TRD water-stop curtain enters the differentiated rock stratum to form a closed water-stop layer.Through the analysis of the comparison between the actual water inflow and the designed amount in the engineering example,the optimization of the design of foundation pit dewatering wells and precipitation amount,and the actual groundwater level and precipitation monitoring,the results show that the TRD bottom-sealing water-stop curtain of deep foundation pits near the river can significantly reduce the water inflow.The revised actual water-stop coefficient is 28.9%,which has a certain gap compared with the designed 40%.This can provide reference for related projects.

关 键 词:降水井 临江深基坑 落底式止水帷幕 止水系数 

分 类 号:TU753[建筑科学—建筑技术科学]

 

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