蓋挖逆作法基坑生產(chǎn)性抽水試驗(yàn)施工工藝探討

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【摘    要】：蓋挖逆作法施工的基坑在頂板施工并覆土完成后，需要進(jìn)行生產(chǎn)性抽水試驗(yàn)，以地鐵項(xiàng)目為例，采用降水井內(nèi)預(yù)置的振弦式孔隙水壓計(jì)的施工工藝，從而換算出坑內(nèi)降水井水位變化情況，以保證生產(chǎn)性抽水試驗(yàn)的順利進(jìn)行。

【關(guān)鍵詞】：蓋挖逆作法；抽水試驗(yàn)；基坑降水；振弦式孔隙水壓計(jì)；地鐵

【中圖分類號(hào)】：U231.3 【文獻(xiàn)標(biāo)志碼】：C 【文章編號(hào)】：1008-3197（2024）04-26-03

【DOI編碼】：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

蓋挖逆作法是現(xiàn)階段地鐵施工中比較常用一種方法，不但可以實(shí)現(xiàn)對(duì)地下空間的最大化使用，還可以盡早恢復(fù)交通通行，避免對(duì)路面上的交通造成嚴(yán)重的影響[1]。（剩余3029字）