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A platform for research: civil engineering, architecture and urbanism
Tunnel portal construction method
The invention relates to a tunnel portal construction method. The tunnel portal construction method comprises the following construction processes that S1, construction preparation is conducted; s2, a groove is excavated; s3, slope brushing of the hole; s4, SNS active protective net construction is conducted on the supporting face; s5, concrete spraying is carried out, primary concrete spraying is carried out when the step S4 is carried out, and after the step S4 is completed, concrete re-spraying is carried out; s6, a middle pilot tunnel advanced small guide pipe is constructed; s7, middle pilot tunnel excavation and support construction are carried out; and S8, main tunnel pipe shed construction is conducted, specifically, drilling platform building, drilling machine installing, drilling, hole cleaning, hole checking, pipe shed steel pipe installing, grouting, hole cleaning and M30 cement mortar filling are conducted in sequence, and the soft rock tunnel portal with edge and front slope bedding slump is effectively reinforced. And damages such as excessive deformation, collapse, overall movement and cracks in the excavation or operation process of the tunnel entrance and exit are prevented.
本发明涉及一种隧道洞口施工方法，包括有如下的施工流程：S1：施工准备；S2：沟槽开挖；S3：洞口刷坡；S4：对支护面进行SNS主动防护网施工；S5：喷混凝土，进行S4时进行初喷混凝土，S4完成后，进行混凝土复喷；S6：中导洞超前小导管施工；S7：中导洞开挖及支护施工；S8：主洞管棚施工，依次进行搭钻孔平台、安装钻机、钻孔、清孔、验孔、安装管棚钢管、注浆、清孔以及充填M30水泥砂浆，对发生边仰坡顺层滑坍的软岩隧道洞口进行有效加固，防止隧道进出口在开挖或运营过程中出现过大变形、塌方、整体移动和裂隙等破坏。
Tunnel portal construction method
The invention relates to a tunnel portal construction method. The tunnel portal construction method comprises the following construction processes that S1, construction preparation is conducted; s2, a groove is excavated; s3, slope brushing of the hole; s4, SNS active protective net construction is conducted on the supporting face; s5, concrete spraying is carried out, primary concrete spraying is carried out when the step S4 is carried out, and after the step S4 is completed, concrete re-spraying is carried out; s6, a middle pilot tunnel advanced small guide pipe is constructed; s7, middle pilot tunnel excavation and support construction are carried out; and S8, main tunnel pipe shed construction is conducted, specifically, drilling platform building, drilling machine installing, drilling, hole cleaning, hole checking, pipe shed steel pipe installing, grouting, hole cleaning and M30 cement mortar filling are conducted in sequence, and the soft rock tunnel portal with edge and front slope bedding slump is effectively reinforced. And damages such as excessive deformation, collapse, overall movement and cracks in the excavation or operation process of the tunnel entrance and exit are prevented.
本发明涉及一种隧道洞口施工方法，包括有如下的施工流程：S1：施工准备；S2：沟槽开挖；S3：洞口刷坡；S4：对支护面进行SNS主动防护网施工；S5：喷混凝土，进行S4时进行初喷混凝土，S4完成后，进行混凝土复喷；S6：中导洞超前小导管施工；S7：中导洞开挖及支护施工；S8：主洞管棚施工，依次进行搭钻孔平台、安装钻机、钻孔、清孔、验孔、安装管棚钢管、注浆、清孔以及充填M30水泥砂浆，对发生边仰坡顺层滑坍的软岩隧道洞口进行有效加固，防止隧道进出口在开挖或运营过程中出现过大变形、塌方、整体移动和裂隙等破坏。
Tunnel portal construction method
一种隧道洞口施工方法
PAN LUQIANG (author) / LONG YICHAO (author) / MIAO XUEQIANG (author) / XIANG WUSONG (author) / LI XIAOBEI (author) / YANG PANFENG (author)
2023-11-14
Patent
Electronic Resource
Chinese
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