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 王衛(wèi)東，翁其平，吳江斌

（華東建筑設(shè)計(jì)研究院有限公司地基基礎(chǔ)與地下工程設(shè)計(jì)研究所，上海 200002）

 

［摘要］大直徑可回收錨索作為一種新型的基坑支護(hù)形式，將高壓旋噴樁技術(shù)應(yīng)用于錨桿技術(shù)中，并對(duì)錨桿端部構(gòu)造進(jìn)行創(chuàng)新, 形成了獨(dú)特的土層錨固成套技術(shù)，有效地解決了軟土地區(qū)傳統(tǒng)錨桿應(yīng)用的難題。大直徑可回收錨索屬于壓力型錨索，具有傳統(tǒng)錨索所缺乏的高承載力以及可回收的兩大優(yōu)勢，近年來在軟土地區(qū)得到大量應(yīng)用和推廣。結(jié)合大直徑可回收錨索在工程中的設(shè)計(jì)與實(shí)踐，對(duì)其施工工藝、構(gòu)造及設(shè)計(jì)計(jì)算進(jìn)行了總結(jié)，并根據(jù)現(xiàn)場試驗(yàn)結(jié)果，采用數(shù)值模擬分析手段，分析得到了大直徑可回收錨索的錨固體摩阻力、軸力以及變形承載特性的一些初步結(jié)果。最后介紹了大直徑可回收錨索在無錫綜合交通樞紐的工程應(yīng)用，為軟土地區(qū)類似工程項(xiàng)目提供參考。

［關(guān)鍵詞］大直徑；可回收；錨索；力學(xué)可回收式；回轉(zhuǎn)可回收式

中圖分類號(hào)：TU473文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2012)05-0177-04

 

Wang Weidong, Weng Qiping, Wu Jiangbin

（Department of Underground Structure & Geotechnical Engineering, East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China）

 

Abstract: As a new kind of foundation pit supporting technique, the large-diameter retrievable anchor cable has solved the difficulties of tradition anchor bolt when applying in soft soil area. The end structure of bolt was modified and on the basis of high pressure jet-grouting pile, the new anchor cable construction technique was devised. This kind of anchor cable is of the pressure type and is superior to the traditional anchor bolt for its high bearing capacity and retrievable feature. As a result, it is enjoying greater popularity in soft soil area. A summary of the design and construction techniques and method of large-diameter retrievable anchor bolts was presented. Based on the in-situ test results and numerical simulation data, the side friction, axial force and load-displacement characteristics of the large-diameter retrievable anchor cable are presented and analyzed. Finally, a case study on its application in Wuxi Integrated Transport Hub is presented to provide a useful reference for future similar cases.

Keywords: large-diameter; retrievable; anchor cable; mechanically retrievable; U-shaped retrievable

*國家科技支撐計(jì)劃課題（2012BAJ01B02），上海市科委課題（10231200600）。

作者簡介：王衛(wèi)東，博士，教授級(jí)高級(jí)工程師，Email:weidong_wang@ecadi.com。

 

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［2］劉國彬, 王衛(wèi)東. 基坑工程手冊 ［M］. 2版. 北京: 中國建筑工業(yè)出版社, 2010.

［3］CECS 22:2005 巖土錨桿（索）技術(shù)規(guī)程［S］.北京:中國計(jì)劃出版社,2005.

［4］常林越, 翁其平，沈健，等.有限跨結(jié)構(gòu)作為超大型基坑支撐的設(shè)計(jì)計(jì)算［J］.地下空間與工程學(xué)報(bào)，2011，7（5）：877-883.