本文選題：軟巖　切入點(diǎn)：掌子面失穩(wěn)　出處：《石家莊鐵道大學(xué)》2014年碩士論文

【摘要】：近年來，隨著我國高速鐵路技術(shù)的不斷發(fā)展，為了克服客運(yùn)專線上高速列車在隧道內(nèi)運(yùn)行所引起的空氣動(dòng)力學(xué)問題，大斷面隧道日益增多。對(duì)于軟弱圍巖，由于地層條件較差，這就對(duì)隧道掌子面自身的穩(wěn)定提出了更高要求，而且掌子面的穩(wěn)定與否在施工中對(duì)整個(gè)隧道的穩(wěn)定也會(huì)產(chǎn)生重要影響。目前，關(guān)于掌子面的變形特征、穩(wěn)定性判別等方面的研究尚處于探索階段，相應(yīng)的研究成果系統(tǒng)性、適用性不強(qiáng)，與實(shí)際要求上存在一定差距。 本文首先在參考前人研究成果后，重點(diǎn)分析掌子面擠出變形發(fā)生發(fā)展規(guī)律，掌子面前方圍巖空間效應(yīng)區(qū)內(nèi)的位移、應(yīng)力的分布規(guī)律，并總結(jié)掌子面擠出變形的主要影響因素。 在圍巖開挖卸載力學(xué)效應(yīng)研究的基礎(chǔ)上，利用大型有限元軟件ANSYS，，采用平面地應(yīng)力逐級(jí)釋放法，分析掌子面擠出位移與地應(yīng)力釋放率的關(guān)系，運(yùn)用近代數(shù)學(xué)中的突變理論，找出掌子面擠出位移發(fā)生突變時(shí)刻對(duì)應(yīng)的地應(yīng)力釋放率，進(jìn)而得到掌子面失穩(wěn)位移。 提出了掌子面穩(wěn)定性控制理念和理論基礎(chǔ)，系統(tǒng)總結(jié)了軟弱圍巖隧道掌子面穩(wěn)定控制技術(shù)及方法，分析了其控制原理，闡述了其主要的工藝方法、使用的材料、機(jī)械設(shè)備、適合的地質(zhì)條件等。
[Abstract]:In recent years, with the continuous development of high-speed railway technology in China, in order to overcome the aerodynamic problems caused by high-speed trains running in tunnels on passenger dedicated lines, large section tunnels are increasing day by day. This puts forward higher requirements for the stability of the tunnel face itself, and whether the face of the tunnel is stable or not will also have an important impact on the stability of the whole tunnel during the construction. At present, about the deformation characteristics of the face of the tunnel, The research on stability discrimination is still in the exploratory stage, the corresponding research results are systematic, and the applicability is not strong, and there is a certain gap between the research results and the actual requirements. In this paper, after referring to the previous research results, this paper focuses on the analysis of the development law of extrusion deformation, displacement and stress distribution of surrounding rock in front of the face, and summarizes the main factors that affect the extrusion deformation of palm face. On the basis of the study on the mechanical effect of excavation and unloading of surrounding rock, using the large-scale finite element software ANSYSand using the plane in-situ stress step by step release method, the relationship between the extrusion displacement and the in-situ stress release rate is analyzed, and the catastrophe theory in modern mathematics is applied. The in-situ stress release rate corresponding to the sudden change in the extrusion displacement of the face of the palm is found, and then the unstable displacement of the face of the palm is obtained. This paper puts forward the concept and theoretical basis of the stability control of the face of the palm, summarizes systematically the technology and method of the stability control of the face of the tunnel with soft surrounding rock, analyzes its control principle, expounds its main technological methods, the materials used, and the machinery and equipment. Suitable geological conditions, etc.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U451.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉貴應(yīng),劉新喜,魏新顏;隧道塌方的尖點(diǎn)災(zāi)變模型及應(yīng)用[J];地質(zhì)災(zāi)害與環(huán)境保護(hù);2002年02期

2 李斌;漆泰岳;高波;曠文濤;;新意法(巖土控制變形工法)概述[J];公路隧道;2009年02期

3 孫會(huì)想;沈才華;;玻璃纖維錨桿注漿加固掌子面效果研究[J];水利與建筑工程學(xué)報(bào);2012年04期

4 翟進(jìn)營;楊會(huì)軍;王莉莉;;新意法隧道設(shè)計(jì)施工概述[J];隧道建設(shè);2008年01期

5 關(guān)寶樹;;軟弱圍巖隧道變形及其控制技術(shù)[J];隧道建設(shè);2011年01期

6 李世輝;;以控制論觀點(diǎn)研究隧道圍巖穩(wěn)定問題及其應(yīng)用[J];煤炭學(xué)報(bào);1988年02期

7 張素敏,劉勇;隧道上臺(tái)階極限位移計(jì)算模擬[J];石家莊鐵道學(xué)院學(xué)報(bào);2003年S1期

8 宋海霞;;在卡海子隧道進(jìn)口段施工中高壓旋噴樁的設(shè)計(jì)與施工控制[J];鐵道建筑;2006年03期

9 周興國;高永濤;盧宏建;韓曉強(qiáng);;超前注漿小導(dǎo)管支護(hù)機(jī)理與效果分析[J];西安建筑科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年04期

10 卿三惠,黃潤秋;烏鞘嶺特長隧道軟弱圍巖大變形特性研究[J];現(xiàn)代隧道技術(shù);2005年02期

相關(guān)博士學(xué)位論文 前1條

1 趙勇;隧道軟弱圍巖變形機(jī)制與控制技術(shù)研究[D];北京交通大學(xué);2012年

本文編號(hào)：1660820