884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（1 河北工業(yè)大學(xué)土木與交通學(xué)院， 天津 300401； 2 河北省土木工程技術(shù)研究中心， 天津 300401；3 中國(guó)鐵路設(shè)計(jì)集團(tuán)有限公司， 天津 300142）

［摘要］依托天津地鐵1號(hào)線延長(zhǎng)線盾構(gòu)直接穿越雙林站-李樓站區(qū)間風(fēng)機(jī)房工程為背景，利用有限元分析軟件ABAQUS對(duì)其盾構(gòu)穿越過(guò)程進(jìn)行三維流-固耦合模擬，并與現(xiàn)場(chǎng)監(jiān)測(cè)結(jié)果進(jìn)行對(duì)比研究。結(jié)果表明：各地下管線沉降的監(jiān)測(cè)值與模擬值基本吻合，有限元模擬過(guò)程基本符合實(shí)測(cè)規(guī)律；各管線沉降曲線近似為正態(tài)分布曲線，變形主要集中在隧道中軸線附近3倍隧道外徑范圍內(nèi)；對(duì)于小凈距隧道開(kāi)挖，各管線的最大沉降位置在兩隧道中軸線中點(diǎn)附近且略靠近右線隧道處；部分臨時(shí)回填情況下地連墻的水平位移和洞口附近超孔壓變化幅度均略大于全部回填的，而不回填時(shí)要明顯大于前兩者的變化幅度，相對(duì)而言，部分臨時(shí)回填較為經(jīng)濟(jì)合理。研究成果將為以后小凈距隧道盾構(gòu)穿越風(fēng)機(jī)房過(guò)程的設(shè)計(jì)施工提供很好的參考價(jià)值。

［關(guān)鍵詞］小凈距隧道； 盾構(gòu)穿越； 現(xiàn)場(chǎng)監(jiān)測(cè)； 三維流-固耦合模擬

中圖分類號(hào)：U455-43文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)19-0102-06

Comparative study on field monitoring and numerical simulation of shield tunneling through the airshaft with small interval

Li Yurun1, 2, Zhang Lei1, Zhang Haoliang3

(1 College of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China; 2 Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China; 3 China Railway Design Corporation, Tianjin 300142, China)

Abstract:Based on the project of shield passing through airshaft directly at Shuanglin-Lilou section of Tianjin Subway Line 1 extension, the process was simulated with a finite element analysis software ABAQUS using the 3D fluid-solid coupling simulation, besides the data obtained were compared with the field monitoring results. The results indicate that the monitoring figure of underground pipeline settlement coincided with the simulated ones almost, and the results of finite element simulated is consistent well with the law of measured; The settlement data of pipelines follow a normal distribution curve basically, and the deformations mainly distribute within the scope of 3 times tunnel outer diameter near the tunnel axis; In regard to the excavation of tunnel with small interval, the maximum settlement takes place near the axis midpoint, deviating slightly to the right; With the technique of partial temporary backfilling, the horizontal displacement of diaphragm wall and variation range of excess pore water pressure near the tunnel entrance are slightly larger than that of complete backfilling, while the figures of without-backfilling are the largest among these 3 methods. Therefore it is more economic-efficient to employ partial temporary backfilling. The research above will provide reference for the design and construction of shield passing through airshaft for tunnel with small intervals in the future.

Keywords:tunnel with small interval; shield crossing; field monitoring;  3D fluid-solid coupling simulation

*國(guó)家自然科學(xué)基金項(xiàng)目（51778207），河北省自然科學(xué)基金項(xiàng)目（E2018202107）。

作者簡(jiǎn)介：李雨潤(rùn)，博士，教授，Email: iemlyr7888@hebut.edu.cn。