大巴山隧道巖溶施工技術(shù)研究
發(fā)布時(shí)間：2018-08-27 07:28
【摘要】：在巖溶地區(qū)修建隧道工程的主要危害有:誘發(fā)工程災(zāi)害和人員傷亡;引起地面塌陷和地表沉降;造成水資源減少和枯竭;導(dǎo)致水質(zhì)污染。本論文依托達(dá)陜高速公路大巴山隧道,重點(diǎn)研究大巴山隧道巖溶施工技術(shù)問題。按照巖溶大小、有無充填及是否在隧道中隱伏三個(gè)方面分析了巖溶隧道溶洞的處理措施,對富水性巖溶地段提出了開挖、排水處理措施,并根據(jù)數(shù)值計(jì)算分析了大巴山隧道巖溶段支護(hù)參數(shù)進(jìn)行了結(jié)構(gòu)計(jì)算,為順利通過巖溶段提供理論和技術(shù)支撐。本文的主要研究進(jìn)展和技術(shù)創(chuàng)新如下:(1)小型非隱伏巖溶處理措施如下:①對溶洞無充填或半充填型巖溶洞穴,應(yīng)在清除溶洞表面浮土或洞穴內(nèi)的充填后,采用先澆筑C15片石混凝土或M7. 5漿砌片石護(hù)墻,后墻背以干砌片石回填;②對于非隱伏性有充填型巖溶洞穴,應(yīng)根據(jù)溶洞的所處位置及方便現(xiàn)場施工,采取相應(yīng)的換填或加強(qiáng)防護(hù)措施,一般采用混凝土或水泥砂漿回填。(2)對于發(fā)育于隧道周邊不同部位的大型溶洞,原則上應(yīng)因地制宜,利用“梁、柱、墻、樁”等結(jié)構(gòu),采用“引、堵、越、繞”等措施進(jìn)行處理。此時(shí),需要根據(jù)溶洞有無充填選擇恰當(dāng)?shù)姆绞?對洞體深且充填豐滿、或難于回填、或不宜填塞的大型干溶洞,可依據(jù)現(xiàn)場條件選用型鋼混凝土+板跨、托梁+板跨、鋼管群樁、樁基+承臺(tái)或回填的方法;對大型充填型溶洞應(yīng)根據(jù)充填物的性質(zhì),選用鋼管樁、旋噴樁、超前大管棚、注漿等措施。(3)對隱伏巖溶處理之前,應(yīng)對情況進(jìn)行詳細(xì)勘察,然后根據(jù)隱伏巖溶的位置進(jìn)行穩(wěn)定性評價(jià),對隧底充填溶洞應(yīng)進(jìn)行完整性及巖溶層受力計(jì)算,確定其加固的必要性及方法;對溶蝕破碎帶,應(yīng)根據(jù)其承載力及溶蝕充填物的流動(dòng)性,確定是否需要采用注漿處理及處理控制深度。
[Abstract]:The main hazards of tunnel construction in karst areas are: inducing engineering disasters and casualties, causing ground subsidence and surface subsidence, reducing and drying up water resources, and leading to water pollution. Based on the Dabashan Tunnel of Da-Shan Expressway, this paper focuses on the karst construction technology of Dabashan Tunnel. According to the size of karst, whether there is filling or not and whether the karst tunnel is concealed in the tunnel, the treatment measures of karst tunnel are analyzed, and the excavation and drainage treatment measures are put forward for the water-rich karst area. The support parameters of karst section of Dabashan tunnel are calculated according to the numerical calculation, which provides theoretical and technical support for the smooth passage of karst section. The main research progress and technological innovations in this paper are as follows: (1) the small scale non-concealed karst treatment measures are as follows: (1) there is no filling or semi-filling karst cave on the karst cave, and it is necessary to remove the floating soil or filling in the cave surface. Cast C _ 15 flake concrete or M _ 7. (5) for the unconcealed filling karst cave, if the back of the wall is backfilled with dry flake stone on the back of the slurry flake stone protective wall, the corresponding replacement or strengthening protective measures should be taken according to the location of the karst cave and the convenient construction on the spot. Generally, concrete or cement mortar is used as backfill. (2) for large caverns developed in different parts around the tunnel, measures such as "beam, column, wall, pile" and "lead, block, overrun, around" structure should be adopted in principle according to local conditions. At this time, according to whether the cavern is filled or not, the appropriate way should be chosen, and for large dry caverns with deep and full cavity body, or difficult to backfill, or not to be filled, the section steel concrete slab span and the bracket slab span may be selected according to the site conditions. The method of steel pipe group pile, pile foundation cap or backfill; according to the nature of filling material, steel pipe pile, rotary jet pile, leading pipe shed, grouting and so on should be selected for large filling cave. (3) before the treatment of concealed karst, The detailed investigation should be carried out, and then the stability evaluation should be carried out according to the location of the concealed karst, and the integrity and the stress of karst layer should be calculated to determine the necessity and method of reinforcement. According to the bearing capacity and the fluidity of the solution filling, it is necessary to use grouting treatment and control depth.
【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)】：U455.49
本文編號(hào)：2206549
[Abstract]:The main hazards of tunnel construction in karst areas are: inducing engineering disasters and casualties, causing ground subsidence and surface subsidence, reducing and drying up water resources, and leading to water pollution. Based on the Dabashan Tunnel of Da-Shan Expressway, this paper focuses on the karst construction technology of Dabashan Tunnel. According to the size of karst, whether there is filling or not and whether the karst tunnel is concealed in the tunnel, the treatment measures of karst tunnel are analyzed, and the excavation and drainage treatment measures are put forward for the water-rich karst area. The support parameters of karst section of Dabashan tunnel are calculated according to the numerical calculation, which provides theoretical and technical support for the smooth passage of karst section. The main research progress and technological innovations in this paper are as follows: (1) the small scale non-concealed karst treatment measures are as follows: (1) there is no filling or semi-filling karst cave on the karst cave, and it is necessary to remove the floating soil or filling in the cave surface. Cast C _ 15 flake concrete or M _ 7. (5) for the unconcealed filling karst cave, if the back of the wall is backfilled with dry flake stone on the back of the slurry flake stone protective wall, the corresponding replacement or strengthening protective measures should be taken according to the location of the karst cave and the convenient construction on the spot. Generally, concrete or cement mortar is used as backfill. (2) for large caverns developed in different parts around the tunnel, measures such as "beam, column, wall, pile" and "lead, block, overrun, around" structure should be adopted in principle according to local conditions. At this time, according to whether the cavern is filled or not, the appropriate way should be chosen, and for large dry caverns with deep and full cavity body, or difficult to backfill, or not to be filled, the section steel concrete slab span and the bracket slab span may be selected according to the site conditions. The method of steel pipe group pile, pile foundation cap or backfill; according to the nature of filling material, steel pipe pile, rotary jet pile, leading pipe shed, grouting and so on should be selected for large filling cave. (3) before the treatment of concealed karst, The detailed investigation should be carried out, and then the stability evaluation should be carried out according to the location of the concealed karst, and the integrity and the stress of karst layer should be calculated to determine the necessity and method of reinforcement. According to the bearing capacity and the fluidity of the solution filling, it is necessary to use grouting treatment and control depth.
【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)】：U455.49
【參考文獻(xiàn)】
相關(guān)期刊論文 前3條
1 蔣忠信;隧道工程與水環(huán)境的相互作用[J];巖石力學(xué)與工程學(xué)報(bào);2005年01期
2 姜清輝,豐定祥;三維非連續(xù)變形分析方法中的錨桿模擬[J];巖土力學(xué);2001年02期
3 光耀華;巖溶地區(qū)工程地質(zhì)研究[J];紅水河;1998年02期
相關(guān)博士學(xué)位論文 前1條
1 張志龍;越嶺長大公路隧道地質(zhì)預(yù)報(bào)中的關(guān)鍵技術(shù)問題研究[D];成都理工大學(xué);2006年
，本文編號(hào)：2206549
本文鏈接：http://www.sikaile.net/kejilunwen/daoluqiaoliang/2206549.html
最近更新
教材專著
