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Construction method for shallow-buried large-section tunnel to pass through expressway under long distance
The construction method specifically comprises the following steps that S1, vertical shafts are constructed on the two sides of a sub-zone and a roadbed of the expressway in the expressway correspondingly, the vertical shaft of the sub-zone in the expressway is a first vertical shaft, and the vertical shafts on the two sides of the roadbed of the expressway are a second vertical shaft and a third vertical shaft correspondingly; s2, the tunnel underneath passing through the expressway is divided into an open excavation section and an underground excavation section, and an advanced pipe shed and an advanced pipe curtain are constructed to the underground excavation section of the tunnel through a vertical shaft; s3, under the support of the advanced pipe roofs and the advanced pipe roofs, a tunnel underground excavation section is constructed, a composite lining is adopted for the tunnel underground excavation section, and the excavation support method is a subsection up-down step method; s4, after construction of the tunnel underground excavation section is completed, a tunnel open excavation section is constructed in the first vertical shaft, and then the first vertical shaft is backfilled; the method can effectively control the pavement settlement of the expressway, greatly reduces the tunnel construction risk, and is of great significance to guarantee the tunnel construction safety and the driving safety of the expressway.
本发明公开了一种浅埋大断面隧道长距离下穿高速公路的施工方法，具体包括以下步骤：S1、分别在高速公路中分带及高速公路路基两侧施工竖井，高速公路中分带的竖井为第一竖井，高速公路路基两侧的竖井分别为第二竖井和第三竖井；S2、将下穿高速公路的隧道分为明挖段和暗挖段，通过竖井向隧道暗挖段施工超前管棚和超前管幕；S3、在超前管棚和超前管幕支护下，施工隧道暗挖段，所述隧道暗挖段采用复合式衬砌，开挖支护方法为分部上下台阶法；S4、隧道暗挖段施工完成后，在第一竖井中施工隧道明挖段，再进行第一竖井回填；该方法可有效的控制高速公路路面沉降，大大降低的隧道施工风险，对保证隧道施工安全和高速公路行车安全具有极为重要的意义。
Construction method for shallow-buried large-section tunnel to pass through expressway under long distance
The construction method specifically comprises the following steps that S1, vertical shafts are constructed on the two sides of a sub-zone and a roadbed of the expressway in the expressway correspondingly, the vertical shaft of the sub-zone in the expressway is a first vertical shaft, and the vertical shafts on the two sides of the roadbed of the expressway are a second vertical shaft and a third vertical shaft correspondingly; s2, the tunnel underneath passing through the expressway is divided into an open excavation section and an underground excavation section, and an advanced pipe shed and an advanced pipe curtain are constructed to the underground excavation section of the tunnel through a vertical shaft; s3, under the support of the advanced pipe roofs and the advanced pipe roofs, a tunnel underground excavation section is constructed, a composite lining is adopted for the tunnel underground excavation section, and the excavation support method is a subsection up-down step method; s4, after construction of the tunnel underground excavation section is completed, a tunnel open excavation section is constructed in the first vertical shaft, and then the first vertical shaft is backfilled; the method can effectively control the pavement settlement of the expressway, greatly reduces the tunnel construction risk, and is of great significance to guarantee the tunnel construction safety and the driving safety of the expressway.
本发明公开了一种浅埋大断面隧道长距离下穿高速公路的施工方法，具体包括以下步骤：S1、分别在高速公路中分带及高速公路路基两侧施工竖井，高速公路中分带的竖井为第一竖井，高速公路路基两侧的竖井分别为第二竖井和第三竖井；S2、将下穿高速公路的隧道分为明挖段和暗挖段，通过竖井向隧道暗挖段施工超前管棚和超前管幕；S3、在超前管棚和超前管幕支护下，施工隧道暗挖段，所述隧道暗挖段采用复合式衬砌，开挖支护方法为分部上下台阶法；S4、隧道暗挖段施工完成后，在第一竖井中施工隧道明挖段，再进行第一竖井回填；该方法可有效的控制高速公路路面沉降，大大降低的隧道施工风险，对保证隧道施工安全和高速公路行车安全具有极为重要的意义。
Construction method for shallow-buried large-section tunnel to pass through expressway under long distance
一种浅埋大断面隧道长距离下穿高速公路的施工方法
LI JIANWEI (author) / YE QIBIN (author) / HUANG FUXIANG (author) / ZHANG YILONG (author) / ZHENG JIANDONG (author) / ZHENG ZHIHONG (author) / LIN JIAN (author) / CHEN DAHAN (author)
2024-01-05
Patent
Electronic Resource
Chinese
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