| 某越江隧道顶管工作井基坑降水方法应用 |
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| 引用本文： | 袁修锦,潘启章,等.某越江隧道顶管工作井基坑降水方法应用[J].中国煤田地质,2002,14(2):49-52. |
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| 作者姓名： | 袁修锦 潘启章 |
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| 作者单位： | 安徽省煤田地质局水文勘探队，安徽省煤田地质局水文勘探队，安徽省煤田地质局水文勘探队 安徽宿州市234000，安徽宿州市234000，安徽宿州市234000 |
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| 摘 要： | 位于上海浦东地区的越江隧道顶管工作井施工基坑距黄浦江防风墙45m,距煤气公司煤气井仪表室1.20m。基坑开挖底界(深度32.45m)为场地内第⑦土层承压含水层顶部(静止水位-6.40m)。为保证基坑施工及临近建筑物的安全,避免基坑降水造成砂土流失而引起的地面沉降问题,在降水井的施工中,根据含水介质的颗粒级配选择相应规格的过滤砂作为过滤层填料,并保证过滤层具有一定的厚度,使降水时的含砂量控制在1/10万以下;采用非稳定流控制水位跟踪作业降水法,尽量减少基坑降水的影响范围,取得了良好的预期效果。
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| 关 键 词： | 基坑降水 顶管工作井 地面沉降控制 越江隧道 |
| 文章编号： | 1004-9177(2002)02-0049-04 |
| 修稿时间： | 2001年6月27日 |
Application of Method on Dewatering of Foundation Pit for Pipe Jacking in Tunnel Across Huangpu River |
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| YUAN Xiu -jin ,PAN Qi -zhang ,LI Lei.Application of Method on Dewatering of Foundation Pit for Pipe Jacking in Tunnel Across Huangpu River[J].Coal Geology of China,2002,14(2):49-52. |
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| Authors: | YUAN Xiu -jin PAN Qi -zhang LI Lei |
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| Institution: | YUAN Xiu -jin 1,PAN Qi -zhang 2,LI Lei 1 |
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| Abstract: | The construction foundation pit of pipe jacking in tunnel of cross river l ocated Pudong area of Shanghai at 45m from windbreak wall of Huangpu river,and 1.20m from instrument room of coal gas well.Bottom border of foundation pit(depth 32.45m)located on the top of confined -water aquifer in No.7earth layer(static groundwater level -6.40m).In order to guarantee safety of fund ation pit construction and nearby building,a nd to prevent ground subside caused b y dewatering of foundation pit,in th e construction of dewatering well,based on the particle grade of water medium,elected relative standard of filtering sand as filtering la yer filler,and ensure that filtering layer there is certain thi ckness,control sand content during dewatering under 1/100thousands,T he dewatering method of follow operation which control water level with unsteady flow,and decrease as f ully as possible influence sphere on dewatering of fundation pit,thus obtained good effects. |
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| Keywords: | dewatering of foundation pit pipe j acking ground subside control tunnel of cross river |
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