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A platform for research: civil engineering, architecture and urbanism
Close-connection rapid construction method for urban large-section ultra-shallow-buried excavation tunnel
The invention discloses an urban large-section ultra-shallow-buried underground excavation tunnel approaching rapid construction method. The method comprises the following steps that S1, construction preparation is conducted; s2, an advanced large pipe shed is constructed; s3, reinforcing and grouting the bridge pile; s4, when the distance L between the tunnel face and the bridge pile in the longitudinal direction of the tunnel is larger than 3 m, the soil body around the tunnel is reinforced through full-section curtain grouting, otherwise, the soil body around the tunnel is reinforced through ground surface grouting, and compensation grouting in the tunnel is conducted according to the excavation condition of the tunnel; s5, tunnel excavation; during tunnel excavation, the tunnel is divided into a left pilot tunnel, a middle pilot tunnel and a right pilot tunnel, and meanwhile, the pilot tunnels are further divided into multiple steps for cyclic excavation; primary supporting and temporary supporting are conducted immediately after excavation of all the pilot tunnels is completed; and when the deformation displacement degree of the tunnel is gradually reduced, the temporary support is removed, an inverted arch is constructed, and the secondary lining is tightly followed. Therefore, under various auxiliary construction methods for tunnel construction, the self-stabilization capability of the soil covering stratum of the tunnel can be effectively improved, and the construction safety and the construction efficiency are improved.
一种城市大断面超浅埋暗挖隧道近接快速施工方法，包括如下步骤：S1、施工准备；S2、超前大管棚施作；S3、桥桩加固注浆；S4、当隧道掌子面沿隧道纵向方向与桥桩的距离L大于3m时，采用全断面帷幕注浆对隧道周围土体进行加固，反之，采用地表注浆对隧道周围土体进行加固，并依据隧道开挖情况进行洞内补偿注浆；S5、隧道开挖；所述隧道开挖时将隧道分为左中右三个导坑，同时导坑内进一步划分多台阶循环开挖；各导坑开挖完立即进行初期支护以及施作临时支撑；当隧道变形位移程度逐渐收敛后拆除临时支撑，施作仰拱，保持二次衬砌紧跟。借此，在多种隧道施工辅助工法下，可使得隧道覆土地层自稳能力有效提升，提高了施工安全性和施工效率。
Close-connection rapid construction method for urban large-section ultra-shallow-buried excavation tunnel
The invention discloses an urban large-section ultra-shallow-buried underground excavation tunnel approaching rapid construction method. The method comprises the following steps that S1, construction preparation is conducted; s2, an advanced large pipe shed is constructed; s3, reinforcing and grouting the bridge pile; s4, when the distance L between the tunnel face and the bridge pile in the longitudinal direction of the tunnel is larger than 3 m, the soil body around the tunnel is reinforced through full-section curtain grouting, otherwise, the soil body around the tunnel is reinforced through ground surface grouting, and compensation grouting in the tunnel is conducted according to the excavation condition of the tunnel; s5, tunnel excavation; during tunnel excavation, the tunnel is divided into a left pilot tunnel, a middle pilot tunnel and a right pilot tunnel, and meanwhile, the pilot tunnels are further divided into multiple steps for cyclic excavation; primary supporting and temporary supporting are conducted immediately after excavation of all the pilot tunnels is completed; and when the deformation displacement degree of the tunnel is gradually reduced, the temporary support is removed, an inverted arch is constructed, and the secondary lining is tightly followed. Therefore, under various auxiliary construction methods for tunnel construction, the self-stabilization capability of the soil covering stratum of the tunnel can be effectively improved, and the construction safety and the construction efficiency are improved.
一种城市大断面超浅埋暗挖隧道近接快速施工方法，包括如下步骤：S1、施工准备；S2、超前大管棚施作；S3、桥桩加固注浆；S4、当隧道掌子面沿隧道纵向方向与桥桩的距离L大于3m时，采用全断面帷幕注浆对隧道周围土体进行加固，反之，采用地表注浆对隧道周围土体进行加固，并依据隧道开挖情况进行洞内补偿注浆；S5、隧道开挖；所述隧道开挖时将隧道分为左中右三个导坑，同时导坑内进一步划分多台阶循环开挖；各导坑开挖完立即进行初期支护以及施作临时支撑；当隧道变形位移程度逐渐收敛后拆除临时支撑，施作仰拱，保持二次衬砌紧跟。借此，在多种隧道施工辅助工法下，可使得隧道覆土地层自稳能力有效提升，提高了施工安全性和施工效率。
Close-connection rapid construction method for urban large-section ultra-shallow-buried excavation tunnel
一种城市大断面超浅埋暗挖隧道近接快速施工方法
LIN JIANHUI (author) / LIANG SHICHENG (author) / KANG MINGXU (author) / LIU ZHIXUN (author) / LIN CHUN (author) / JIANG KUN (author) / WU WANXIA (author) / LIAO YIYUAN (author) / LIU BAOCHAO (author) / LIN JUN (author)
2024-12-13
Patent
Electronic Resource
Chinese
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