盖挖逆作法基坑生产性抽水试验施工工艺探讨

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【摘    要】:盖挖逆作法施工的基坑在顶板施工并覆土完成后,需要进行生产性抽水试验,以地铁项目为例,采用降水井内预置的振弦式孔隙水压计的施工工艺,从而换算出坑内降水井水位变化情况,以保证生产性抽水试验的顺利进行。

【关键词】:盖挖逆作法;抽水试验;基坑降水;振弦式孔隙水压计;地铁

【中图分类号】:U231.3 【文献标志码】:C 【文章编号】:1008-3197(2024)04-26-03

【DOI编码】:10.3969/j.issn.1008-3197.2024.04.006

Discussion on the Construction Technology of Production Pumping Test for

Foundation Pit by Inverted Construction Method

LI Guoyao,MA Tao,WANG Jing

(Shanghai Changkai Geotechnical Engineering Co. Ltd.,Shanghai 200093,China)

【Abstract】:For the basement excavated by the inverted construction method, after the top slab is completed and the soil is covered, a production water test is required. Using a subway project as an example,the construction process involves placing a piezoelectric porosity water pressure gauge in the well to calculate the water level change in the well, thereby ensuring the successful completion of the production water test.

【Key words】:inverted construction method;water test;foundation pit dewatering; piezoelectric porosity water pressure gauge;subway

盖挖逆作法是现阶段地铁施工中比较常用一种方法,不但可以实现对地下空间的最大化使用,还可以尽早恢复交通通行,避免对路面上的交通造成严重的影响[1]。(剩余3029字)

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