【摘要】：為滿足經(jīng)濟(jì)發(fā)展與交通建設(shè)的需求,在巖溶地區(qū)修建隧道工程越來越普遍。雖然現(xiàn)有施工工法可以滿足巖溶隧道的修建,但由于當(dāng)前規(guī)范對(duì)巖溶隧道施工方案的選擇沒有詳細(xì)規(guī)定,因此設(shè)計(jì)人員主要通過經(jīng)驗(yàn)進(jìn)行選擇,這樣容易低估巖溶隧道地質(zhì)災(zāi)害的發(fā)生概率,造成塌方、突泥涌水、地表塌陷等工程災(zāi)害,甚至威脅到現(xiàn)場(chǎng)施工人員的生命安全。本文以婁底至邵陽鐵路擴(kuò)能改造工程站前工程中張家灣隧道為背景,參考該隧道的設(shè)計(jì)參數(shù),甄選典型斷面,通過彈塑性理論及ABAQUS數(shù)值模擬研究了單個(gè)隱伏溶洞在隧道洞周不同位置對(duì)圍巖穩(wěn)定性的影響,并且結(jié)合三臺(tái)階法、雙側(cè)壁導(dǎo)坑法、CD法(中隔壁法)的施工過程,就巖溶隧道淺埋段的施工工法進(jìn)行比選,為以后設(shè)計(jì)施工提供依據(jù)。研究內(nèi)容主要包括以下幾個(gè)方面：(1)歸納整理張家灣隧道的量測(cè)資料,建立回歸方程,對(duì)隧道圍巖沉降和圍巖收斂曲線進(jìn)行擬合,評(píng)定了開挖隧道圍巖穩(wěn)定性。(2)基于彈塑性理論研究了隧道開挖后分別處于二次應(yīng)力狀態(tài)下和三次應(yīng)力狀態(tài)下的塑性區(qū)范圍,以及溶洞的塑性區(qū)范圍,以雙方塑性區(qū)不相接為標(biāo)準(zhǔn),計(jì)算出隧道與溶洞之間安全距離。(3)通過ABAQUS數(shù)值模擬軟件,基于張家灣隧道DK19+405斷面實(shí)際工程建立模型,模擬在不同位置單個(gè)隱伏溶洞下三臺(tái)階法、雙側(cè)壁導(dǎo)坑法和CD法對(duì)隧道的開挖過程,整理了三種施工全過程中拱頂沉降、地表沉降、圍巖收斂、塑性應(yīng)力場(chǎng)的發(fā)展的數(shù)據(jù),比選出最佳施工方法。(4)通過ABAQUS數(shù)值模擬軟件,對(duì)三臺(tái)階法在90°、45°、-90°單個(gè)溶洞的情況下分別進(jìn)行了施工優(yōu)化。
[Abstract]:In order to meet the demand of economic development and traffic construction, it is more and more common to build tunnels in karst areas. Although the existing construction methods can satisfy the construction of karst tunnels, since the current codes do not specify the selection of construction schemes for karst tunnels in detail, the designers mainly select them through experience. It is easy to underestimate the probability of geological disasters in karst tunnels, causing engineering disasters such as landslides, water inrush and surface subsidence, even threatening the safety of construction workers. Based on the Zhangjiawan tunnel in the railway expansion and reconstruction project from Loudi to Shaoyang, the typical section is selected according to the design parameters of the tunnel. Based on the elastoplastic theory and ABAQUS numerical simulation, the influence of different positions of a single concealed cave around the tunnel on the stability of surrounding rock is studied, and the construction process of the CD method (middle next door method) combined with the three-step method and the double-side wall guide pit method is studied. The construction method of shallow buried section of karst tunnel is compared and selected, which provides the basis for the design and construction of karst tunnel in the future. The main contents of the study are as follows: (1) summing up and arranging the measurement data of Zhangjiawan tunnel, establishing the regression equation, fitting the settlement and convergence curve of the surrounding rock of the tunnel. The stability of surrounding rock of excavated tunnel is evaluated. (2) based on elastoplastic theory, the range of plastic zone under secondary stress state and cubic stress state after excavation and plastic zone range of karst cave are studied. The safe distance between the tunnel and the cave is calculated according to the criterion that the plastic zone of both sides is not connected. (3) based on the actual engineering of the DK19 405 section of Zhangjiawan Tunnel, the model is established by using the ABAQUS numerical simulation software, and the three step methods are simulated under the single hidden karst cave in different positions. In the excavation process of tunnel by double-sidewall pit guide method and CD method, three kinds of data of dome settlement, ground subsidence, surrounding rock convergence and plastic stress field development during the whole construction process are sorted out, and the optimum construction method is compared. (4) through ABAQUS numerical simulation software, Under the condition of 90 擄45 擄-90 擄single karst cave, the construction optimization of three step method is carried out respectively.
【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】：2015
【分類號(hào)】：U455.4

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳德斌;;巖溶隧道施工安全風(fēng)險(xiǎn)管理研究[J];貴州工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年06期

2 伍帆;袁定安;;武廣鐵路客運(yùn)專線尖峰頂隧道復(fù)雜巖溶段施工技術(shù)[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2010年01期

3 羅云騰;;鐵路巖溶隧道的投資控制[J];鐵路工程造價(jià)管理;2010年01期

4 董貴春;;某高風(fēng)險(xiǎn)巖溶隧道區(qū)域巖溶水化學(xué)特征分析[J];山西建筑;2010年24期

5 姚永春;;公路巖溶隧道的技術(shù)管理[J];交通世界(建養(yǎng).機(jī)械);2011年Z1期

6 吳治生;張杰;;巖溶隧道風(fēng)險(xiǎn)影響因素及評(píng)估[J];鐵道工程學(xué)報(bào);2011年10期

7 黃小城;陳秋南;陽躍朋;張志敏;;可拓理論對(duì)復(fù)雜條件下巖溶隧道的風(fēng)險(xiǎn)評(píng)估[J];地下空間與工程學(xué)報(bào);2013年05期

8 楊文超;;淺析高風(fēng)險(xiǎn)巖溶隧道的施工管理[J];科技與企業(yè);2014年03期

9 韓星俊;巖溶隧道處理方法初探[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2004年12期

10 卓越;鄒，

本文編號(hào)：2207385