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韓志剛

（ 云南云通監(jiān)理咨詢有限公司 ，云南 昆明 650000 )

摘   要 ：針對隧道突泥涌水危害大的問題 ，結(jié)合激發(fā)極化法 、地質(zhì)雷達(dá) 、跨孔 CT 等方法 ，對九頂山隧道 ZK281+ 940 ~ ZK281+ 947 突泥涌水段進(jìn)行探測 ，并根據(jù)探測結(jié)果分析出現(xiàn)突泥涌水的原因 。結(jié)果表明 ，通過地質(zhì)雷達(dá)、跨孔 CT 、激發(fā)極化法，得出在 1 ~ 4 號鉆孔中 11 ~ 22 m 處都存在破碎巖體，且富含水體；巖性分析發(fā)現(xiàn)突 泥涌水段圍巖等級為 VI 級，多為易碎的全風(fēng)化灰?guī)r，穩(wěn)定性差，易出現(xiàn)塌方；九頂山隧道突泥涌水段每隔約 12 h間歇性涌水；暴雨天氣涌水量明顯增加，且存在地表水補給的現(xiàn)象。造成隧道突泥涌水的成因 ，是隧道開 挖對巖土上方的全風(fēng)化花崗巖結(jié)構(gòu)產(chǎn)生破壞 ，造成使灰?guī)r層中的裂隙水與花崗巖破壞結(jié)構(gòu)連通 ，進(jìn)而讓花崗巖 巖體軟化 ，最終使得初期支護(hù)失效，從而引發(fā)隧道塌方。針對以上成因，提出“ 探”、“截”、“泄”、“帷 ” 的處治措施 。通過工程實踐表明，以上處治方案有效。

關(guān)鍵詞 ：巖溶隧道 ；突泥涌水 ；災(zāi)變機(jī)理；處治技術(shù)

中圖分類號 ：TU195           

文獻(xiàn)標(biāo)志碼 ：A            

文章編號 ：1005- 8249  (2023)   04- 0031- 06

DOI : 10. 19860/j . cnki. issn1005- 8249. 2023 . 04. 005

HAN Zhigang

(  Yunnan  Yuntong Supervision Consulting Co. ，Ltd. ，Kunming 650000 ,   China  )

Abstract: in view of the great harm of mud and water inrush in the tunnel, the zk281+940 ～ zk281+947 mud and water inrush section of Jiudingshan tunnel is detected by using the methods of induced polarization, geological radar and cross hole CT, and the causes of mud and water inrush are analyzed according to the detection results. The results show that through geological radar, cross hole CT and induced polarization method, it is concluded that there are broken rock masses in 11~22m of No. 1~4 boreholes, and they are rich in water; The lithology analysis shows that the surrounding rock of the mud and water inrush section is grade VI, mostly fragile completely weathered limestone, with poor stability and prone to collapse; The mud inrush and water inrush section of Jiudingshan tunnel bursts water intermittently every about 12h; In rainstorm weather, the water inflow increases obviously, and there is a phenomenon of surface water recharge. The cause of mud and water inrush in the tunnel is that the tunnel excavation destroys the completely weathered granite structure above the rock and soil, connecting the fissure water in the limestone layer with the damaged structure of the granite, softening the granite rock mass, and finally invalidating the initial support, thus causing the tunnel collapse. In view of the above causes, the treatment measures of "exploration", "interception", "drainage" and "curtain" are put forward. The engineering practice shows that the above treatment scheme is effective.

Keywords: karst tunnel; mud and water inrush; catastrophe mechanism; treatment technology

作者簡介 ：韓志剛  ( 1983—) ,   男，本科， 高級工程師，研 究方向 ：隧道突泥涌水預(yù)防與處治

收稿日期 ：2021- 08- 06