本文關(guān)鍵詞：明挖深基坑下臥多層隧道施工關(guān)鍵技術(shù)研究　出處：《西南交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 深基坑 多層隧道 施工技術(shù) 爆破 松動(dòng)圈

【摘要】：隨著城市化進(jìn)程的飛速發(fā)展,城市綜合交通樞紐換乘向立體換乘方向發(fā)展已成為大趨勢(shì)。城市樞紐工程因條件限制,很多地段無(wú)法明挖或全明挖,以及為避免深大基坑,形成地下立體結(jié)構(gòu)體。隨著城市軌道交通的發(fā)展,大量的上跨下穿區(qū)間隧道成為必然。目前對(duì)于這種多層上跨下穿區(qū)間隧道施工可借鑒的經(jīng)驗(yàn)較少,因此展開(kāi)明挖深基坑下臥多層隧道施工關(guān)鍵技術(shù)研究對(duì)我國(guó)的城市化建設(shè)有重要的意義。本文以重慶沙坪壩交通樞紐綜合改造工程為依托,展開(kāi)了以下研究:1、基于位移判定準(zhǔn)則對(duì)基坑與下臥隧道和下臥隧道與底部交叉隧道兩種近接形式進(jìn)行影響分區(qū)劃分,考慮多層隧道的交疊作用,提出了多層隧道交疊影響分區(qū)計(jì)算方法,并驗(yàn)證了計(jì)算方法的適用性。2、基于強(qiáng)度折減法得到了基坑下臥近接隧道圍巖破壞模式,提出了下臥淺埋隧道荷載計(jì)算方法,并根據(jù)底部交叉隧道地質(zhì)特點(diǎn),給出了底部交叉隧道荷載計(jì)算方法。3、分別對(duì)基坑下臥單層隧道和下臥兩層隧道進(jìn)行了施工時(shí)序、施工工法和開(kāi)挖步距比選,綜合比較了地表沉降、中夾巖應(yīng)力、支護(hù)結(jié)構(gòu)應(yīng)力和位移等指標(biāo),給出了合理的施工時(shí)序、施工工法和開(kāi)挖步距建議。4、研究了機(jī)械開(kāi)挖和爆破開(kāi)挖單洞圍巖松動(dòng)圈分布規(guī)律,探明了爆破對(duì)水平平行和上下重疊隧道中巖柱(巖板)的影響,并給出了爆破開(kāi)挖中巖柱(巖板)安全控制標(biāo)準(zhǔn)和加固措施。
[Abstract]:With the rapid development of urbanization, it has become a major trend that urban comprehensive transportation hub transfer to three-dimensional transfer direction. Due to the constraints of urban hub engineering, many areas can not be excavated or fully excavated. And in order to avoid deep and large foundation pit and form underground three-dimensional structure, with the development of urban rail transit. A large number of upper span and lower cross interval tunnels become inevitable. At present, there is less experience for the construction of this multi-story upper span and lower span interval tunnel. Therefore, it is of great significance to carry out the research on the key technology of underground multi-layer tunnel construction in open excavation deep foundation pit. This paper relies on the comprehensive reconstruction project of Shapingba transportation hub in Chongqing. The following research is carried out: 1. Based on the displacement criterion, the paper divides the near connection between foundation pit and underside tunnel and bottom cross tunnel, and considers the overlapping effect of multi-layer tunnel. The method of multi-layer tunnel overlapping influence zoning is proposed and the applicability of the calculation method is verified. Based on the strength reduction method, the failure mode of surrounding rock of adjacent tunnel under foundation pit is obtained. In this paper, a method for calculating the load of a shallow buried tunnel is put forward, and a method of calculating the load of a cross tunnel at the bottom of the tunnel is given according to the geological characteristics of the cross tunnel at the bottom. The construction sequence, construction method and excavation step distance of single-layer tunnel and two-story tunnel are compared, and the indexes of ground subsidence, mid-rock stress, support structure stress and displacement are compared. The reasonable construction time sequence, construction method and excavation step distance suggestion. 4 are given, and the distribution law of loose zone of surrounding rock in mechanical excavation and blasting excavation is studied. The effect of blasting on rock column (rock slab) in horizontal parallel and upper and lower superimposed tunnels is investigated, and the safety control standard and reinforcement measures of rock column (slab) in blasting excavation are given.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U455.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 章慧健;仇文革;孔超;;新建隧道近接既有建筑物施工的破壞模式研究[J];現(xiàn)代隧道技術(shù);2016年04期

2 徐坤;王志杰;孟祥磊;孫長(zhǎng)升;;深埋隧道圍巖松動(dòng)圈探測(cè)技術(shù)研究與數(shù)值模擬分析[J];巖土力學(xué);2013年S2期

3 鄭穎人;王永甫;;隧道穩(wěn)定性分析與設(shè)計(jì)方法講座之一:隧道圍巖壓力理論進(jìn)展與破壞機(jī)制研究[J];隧道建設(shè);2013年06期

4 崔光耀;王明年;喻波;;地鐵車站隧道群施工相互影響范圍及應(yīng)用研究[J];工程勘察;2011年11期

5 肖明;張雨霆;陳俊濤;田華;;地下洞室開(kāi)挖爆破圍巖松動(dòng)圈的數(shù)值分析計(jì)算[J];巖土力學(xué);2010年08期

6 王明洋;范鵬賢;李文培;;巖石的劈裂和卸載破壞機(jī)制[J];巖石力學(xué)與工程學(xué)報(bào);2010年02期

7 王明年;郭軍;羅祿森;楊建民;喻渝;譚忠盛;;高速鐵路大斷面深埋黃土隧道圍巖壓力計(jì)算方法[J];中國(guó)鐵道科學(xué);2009年05期

8 嚴(yán)鵬;盧文波;單治鋼;陳祥榮;周永;周春宏;;深埋隧洞爆破開(kāi)挖損傷區(qū)檢測(cè)及特性研究[J];巖石力學(xué)與工程學(xué)報(bào);2009年08期

9 徐林生;;大斷面高速公路隧道復(fù)合式襯砌結(jié)構(gòu)受力監(jiān)測(cè)分析[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年03期

10 湯勁松;劉松玉;童立元;;高速公路大跨隧道最小安全凈距研究[J];土木工程學(xué)報(bào);2008年12期

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