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李玉选,杨双锁. 基坑潜水及承压水降水引起的地表沉降计算方法研究[J]. 科学技术与工程, 2020, 20(23): 9574-9579.
LI Yu-xuan.Research on Calculation Method of Ground Settlement Caused by Dewater of Foundation Pit Unconfined and Confined Water[J].Science Technology and Engineering,2020,20(23):9574-9579.
基坑潜水及承压水降水引起的地表沉降计算方法研究
Research on Calculation Method of Ground Settlement Caused by Dewater of Foundation Pit Unconfined and Confined Water
投稿时间:2019-08-28  修订日期:2020-05-04
DOI:
中文关键词:  潜水与承压水 基坑降水 地表沉降 附加应力 修正计算
英文关键词:Unconfined and Confined Water foundation pit dewatering the surface settlement amended calculation formula
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
     
作者单位
李玉选 太原理工大学矿业工程学院
杨双锁 太原理工大学矿业工程学院
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中文摘要:
      为了预测潜水与承压水并存的基坑降水引起的地表沉降,以有效应力原理,渗流理论,以及土体沉降理论为基础,推导了一种新的基坑降水引起的地表沉降计算方法。根据降水引起附加应力机理的不同,将沉降计算分成三个部分。分别推导减压降水渗流漏斗及疏干降水产生的附加应力,根据所得附加应力推导基坑降水产生的地表沉降计算公式,再利用叠加原理,修正分层总和计算,得出沉降的最终计算公式。通过对工程实例进行计算,结果表明:降水引起的地表沉降最大值达到61.83mm,距减压井中心30m处仍有24mm沉降;且计算值与实测值相差不大,表明此计算公式的合理性。
英文摘要:
      In order to predict the ground settlement caused by the foundation pit dewatering with the coexistence of diving and confined water,based on principle of effective stress,complete well theory and soil settlement theory,a new formula for calculating ground settlement caused by foundation pit dewatering was derived.According to the diference of the mechanism of additional stress caused by dewatering, settlement calculation was divided into three parts.The additional stress caused by seepage funnel of decompressed dewatering and sewer drainage was calculated,according the result of additional stress,the calculation formula of ground settlement caused by foundation pit dewatering was derived. Based on the principle of superposition, an amended calculation formula about the accumulation method of each layer was obtained caused by foundation pit dewatering. Through the calculation of engineering examples,results indicate that:the maximum land subsidence caused by precipitation reach 61.83mm,there is still 24mm settlement 30m away from the relief well center;
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