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（1 華東建筑設(shè)計(jì)研究院有限公司上海地下空間與工程設(shè)計(jì)研究院， 上海 200002;2 上?；庸こ汰h(huán)境安全控制工程技術(shù)研究中心， 上海 200002）

［摘要］沿江沿海軟土地區(qū)深基坑工程臨時(shí)圍護(hù)結(jié)構(gòu)工程量大，資源浪費(fèi)嚴(yán)重，同時(shí)高地下水位條件下，基坑開挖滲漏水風(fēng)險(xiǎn)和承壓水降壓對(duì)周邊環(huán)境的影響加劇了工程風(fēng)險(xiǎn)。以上海虹橋商務(wù)區(qū)D13街坊項(xiàng)目的設(shè)計(jì)和實(shí)踐為例，介紹了“樁墻合一”技術(shù)和TRD水泥土攪拌墻兩項(xiàng)巖土工程新技術(shù)在基坑工程的應(yīng)用。該項(xiàng)目采用“樁墻合一”設(shè)計(jì)，利用圍護(hù)排樁作為永久使用階段地下結(jié)構(gòu)側(cè)壁的一部分，分擔(dān)永久使用階段側(cè)向土壓力，減小了地下室外墻厚度，節(jié)省了大量資源。為減小降壓對(duì)周邊環(huán)境影響，采用TRD等厚度水泥土攪拌墻設(shè)置深40～49m止水帷幕，成墻質(zhì)量均勻可靠，隔水性能好。目前該基坑工程已順利完成，巖土工程新技術(shù)的應(yīng)用大幅節(jié)省了工程造價(jià)，并很好地保護(hù)了基坑周邊的環(huán)境。

［關(guān)鍵詞］地下空間； 基坑工程； 樁墻合一； TRD工法； 承壓水

中圖分類號(hào)：TU46+3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)21-0109-05

Application of new geotechnical technologys in deep and large underground projects in soft soil area

Hu Yun1,2, Shen Jian1,2, Chang Linyue1,2, Wang Weidong1,2

(1 Shanghai Underground Space & Engineering Design and Research Institute, East China Architectural Design and Research Institute Co., Ltd., Shanghai 200002, China; 2 Shanghai Engineering Research Center of Safety Control for Facilities Adjacent to Deep Excavations, Shanghai 200002, China)

Abstract:For deep excavations constructed in riverside and coastal areas, the engineering quantity of temporary retaining structures is large and may bring about serious waste of resources. At the same time, under the condition of high groundwater level, the leakage risk during excavation and the influence of pressure-relief of confined water on the surrounding environment aggravate the engineering risk. New techniques of dual-purpose bored pile wall method and steel cement-soil wall constructed by TRD method were introduced in the excavation engineering of Hongqiao D13 project in Shanghai. By using dual-purpose bored pile wall method, in which bored piles were used as retaining structures at excavation stage and as a part of structural walls at permanent stage, the thickness of basement exterior wall was reduced and the construction materials were significantly saved. To minimize the influence of dewatering on the environment adjacent to the excavation, 40～49m-deep cut-off walls constructed using TRD method were used. The quality of the wall was uniform and reliable, and the water separation performance was good. At present, this excavation engineering project has been successfully completed. The application of new geotechnical techniques in this project not only saved construction cost but also protected environment around the excavation.

Keywords:underground space; excavation engineering; dual-purpose wall method; TRD construction method; confined water

*上海市建委課題（滬住建管科2016-009-003），上海市青年科技啟明星課題（16QB1400100）。

作者簡介：胡耘，博士，高級(jí)工程師，Email：yun_hu@xd-ad.com.cn。