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趙玉成¹  ,  代兆宇¹  ,  夏瑞萌²  ,  婁海成²

( 1 .  石家莊鐵道大學(xué) 土木工程學(xué)院 ，河北 石家莊 050043 ; 2.  北京城建設(shè)計集團股份有限公司 ，北京 100037)

摘   要：為研究雙排樁支護在雄安新區(qū)典型地層下的承載與變形特性，指導(dǎo)后續(xù)工程建設(shè)， 以樁頂豎向位移、水平位移和樁體水平位移為主要分析項目。通過現(xiàn)場監(jiān)測與軟件計算的方式，對雙排樁支護方式在該地區(qū) 地質(zhì)條件下的響應(yīng)特性進行了系統(tǒng)研究。結(jié)果表明： 雙排樁樁頂豎向位移整體以隆起為主，且前排樁隆起明顯大于后排樁 ；前排樁變形相比于后排樁的變形較大，系梁存在受壓或受拉兩種狀態(tài) ；基坑下半部分土體開挖階 段樁頂水平位移增長迅速 ；前后排樁樁身變形形態(tài)受系梁的拉結(jié)作用明顯，具有明顯差異。

關(guān)鍵詞：雙排樁支護 ；監(jiān)測數(shù)據(jù) ；樁體位移 ；冠梁剛度

中圖分類號：TU473            

文獻標志碼：A           

文章編號： 1005- 8249   (2024)  06- 0079- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.015

 

ZHAO Yucheng¹  ,  DAI Zhaoyu¹  ,  XIA Ruimeng² ,  LOU Haicheng²

（ 1 . School of Civil Engineering ,  Shijiazhuang Tiedao University ,  Shijiazhuang 050043 ,  China;  2. Beijing Urban Construction Design & Development Group Co. ，Ltd. ，Beijing 100037 ,  China)

Abstract：In order to study the bearing and deformation characteristics of double-row piles retaining structure under the typical stratum of Xiong’an New Area and guide the subsequent construction. A foundation pit project in the Xiong’an New Area, where double-row piles retaining structure was used for the first time, was taken as the research object, with vertical displacement of pile top, horizontal displacement of pile top and horizontal displacement of pile body as the main analysis items. The response characteristics of the double-row piles retaining structure method in the soil and water environment of the area were systematically studied by means of field monitoring and software calculation. The study shows that the vertical displacement of the top of the double-row pile is mainly elevated, and the elevation of the front-row pile is significantly larger than that of the back-row pile. The deformation of the front row piles is larger than that of the rear row piles, and the tie beam exists in two states of compression or tension. The horizontal displacement of pile tops in the excavation stage of the lower half of the foundation pit grows rapidly. The deformation patterns of the front and rear piles are significantly different by the tensile effect of the tie beam. The simplified model in the current calculation software is too simple, and both the calculated deformation values and deformation patterns are significantly different from the monitoring data.

Keywords :  double- row piles retaining structure;  monitoring data; pile displacement; top beam stiffness

作者簡介：趙玉成  (1969—) ,  男 ，教授 ，研究方向：城市地下工程理論與應(yīng)用。

通信作者：夏瑞萌  (1983—) ,  男 ，教授級高級工程師 ，研究方向：地下工程設(shè)計。

收稿日期：2023- 06- 09