本文選題：巖體滲流　切入點(diǎn)：涌水量預(yù)測(cè)　出處：《西南交通大學(xué)》2015年碩士論文

【摘要】：隨著西南地區(qū)交通基礎(chǔ)設(shè)施的建設(shè),隧道工程的規(guī)模越來(lái)越大,在隧道修建過(guò)程中,所遇到地質(zhì)條件復(fù)雜,涌突水、突泥、軟巖大變形、巖爆等災(zāi)害時(shí)有發(fā)生,其中突涌水災(zāi)害所造成的人員傷亡和經(jīng)濟(jì)損失在各類(lèi)隧道地質(zhì)災(zāi)害中居于前列,不僅導(dǎo)致重大人員傷亡或嚴(yán)重工期延誤,也對(duì)地表及隧址區(qū)水資源和環(huán)境造成了不可修復(fù)的污染和生態(tài)破壞。并且在隧道運(yùn)營(yíng)階段,由于巖溶地區(qū)地下水與降雨聯(lián)系密切,造成隧道運(yùn)營(yíng)階段出現(xiàn)涌水,進(jìn)而對(duì)行車(chē)安全造成危害。本文以重慶雙碑隧道為例,對(duì)隧道施工和運(yùn)營(yíng)期涌水量進(jìn)行了預(yù)測(cè),并提出了預(yù)警措施。主要研究?jī)?nèi)容及成果如下：(1)根據(jù)隧址區(qū)地質(zhì)條件和水文條件對(duì)隧道涌水量因素進(jìn)行評(píng)價(jià),初步判斷了出現(xiàn)涌水的大小與位置�；趲r體滲流理論,提出了適用中梁山觀音峽地區(qū)的地下水流模型,即考慮裂隙存在的等效介質(zhì)模型。(2)劃分了隧道各區(qū)段的地下水動(dòng)力帶,并依據(jù)理論公式的適用范圍對(duì)各區(qū)段進(jìn)行了理論公式的選擇和結(jié)果預(yù)測(cè),經(jīng)與實(shí)際監(jiān)測(cè)數(shù)據(jù)進(jìn)行了對(duì)比,確定了各區(qū)段的正常涌水量和最大涌水量適用公式。(3)通過(guò)有限差分軟件Visual MODFLOW建立了該地區(qū)的水文地質(zhì)概念模型,預(yù)測(cè)了施工過(guò)程中各區(qū)段的平均涌水量,證明了該軟件在隧址區(qū)的適用性,并研究了施工階段隧址區(qū)的滲流場(chǎng)變化。(4)預(yù)測(cè)了隧道運(yùn)營(yíng)階段枯水期和降雨期的隧道涌水量,針對(duì)運(yùn)營(yíng)隧道涌水病害提出了預(yù)警措施。
[Abstract]:With the construction of traffic infrastructure in southwest China, the scale of tunnel engineering is becoming larger and larger. In the process of tunnel construction, the geological conditions are complicated, such as water gushing, mud outburst, large deformation of soft rock, rock burst and so on. Among them, the casualties and economic losses caused by the sudden flooding of water are in the forefront of all kinds of tunnel geological disasters, which not only lead to heavy casualties or serious delays in the construction period, It also causes irreparable pollution and ecological damage to the water resources and environment in the surface and tunnel area. In the tunnel operation stage, the groundwater in karst area is closely related to rainfall, resulting in water gushing in tunnel operation stage. Taking Chongqing Shuangbei Tunnel as an example, the water inflow during the construction and operation of the tunnel is forecasted. The main research contents and results are as follows: 1) based on the geological and hydrological conditions of tunnel area, the factors of tunnel water inflow are evaluated, and the magnitude and position of water gushing are preliminarily judged, based on the seepage theory of rock mass. A model of groundwater flow in Guanyin Gorge area of Zhongliangshan, I. e., equivalent medium model considering the existence of fissures, is proposed. The groundwater dynamic zones of each section of the tunnel are divided. According to the scope of application of the theoretical formula, the selection of the theoretical formula and the prediction of the results of each section are carried out, and the results are compared with the actual monitoring data. The suitable formula for normal and maximum discharge of each section is determined. The hydrogeological conceptual model of this area is established by using finite difference software Visual MODFLOW, and the average water inflow of each section during construction is predicted. The applicability of the software in tunnel area is proved, and the variation of seepage field in tunnel site area in construction stage is studied. (4) the tunnel water inflow during dry and rainfall periods is forecasted, and the early warning measures are put forward for the water gushing disease of operating tunnel.
【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(lèi)號(hào)】：U456.32

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