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A platform for research: civil engineering, architecture and urbanism
Hole entering construction method for unfavorable surrounding rock structure
The invention discloses a tunnel entering construction method for an unfavorable surrounding rock structure, and belongs to the technical field of diversion tunnel construction. Comprising the following steps: S0, earlier-stage treatment; the method comprises the following steps: S1, reinforcing support of a hole slope; s2, forepoling within the range of a hole and a spandrel; s3, excavating a hole body; and S4, concrete lining. According to the method, under the condition that the tunnel face slope reveals an unfavorable surrounding rock structure, the upper slope of the tunnel opening is reinforced and supported, the anchor bar piles are utilized to carry out advanced support in the tunnel face and arch shoulder range, the tunnel opening is layered up and down, and the upper layer is excavated according to the two sides behind the pilot tunnel, and safe cut-through is achieved on the premise that the overall stability of the slope and the tunnel body is improved.
本发明公开了一种不利围岩结构处进洞施工方法，属于导流洞施工技术领域；包括以下步骤：S0、前期处理；S1、洞口边坡加强支护；S2、洞口及拱肩范围内超前支护；S3、洞身开挖；S4、混凝土衬砌。本发明，在洞脸边坡揭露不利围岩结构的情况下，进行洞口上部边坡加强支护，并利用锚筋桩在洞脸及拱肩范围进行超前支护，洞口按上下分层，上层按先导洞后两侧的开挖技术，在提高边坡及洞身整体稳定性的前提下安全贯通。
Hole entering construction method for unfavorable surrounding rock structure
The invention discloses a tunnel entering construction method for an unfavorable surrounding rock structure, and belongs to the technical field of diversion tunnel construction. Comprising the following steps: S0, earlier-stage treatment; the method comprises the following steps: S1, reinforcing support of a hole slope; s2, forepoling within the range of a hole and a spandrel; s3, excavating a hole body; and S4, concrete lining. According to the method, under the condition that the tunnel face slope reveals an unfavorable surrounding rock structure, the upper slope of the tunnel opening is reinforced and supported, the anchor bar piles are utilized to carry out advanced support in the tunnel face and arch shoulder range, the tunnel opening is layered up and down, and the upper layer is excavated according to the two sides behind the pilot tunnel, and safe cut-through is achieved on the premise that the overall stability of the slope and the tunnel body is improved.
本发明公开了一种不利围岩结构处进洞施工方法，属于导流洞施工技术领域；包括以下步骤：S0、前期处理；S1、洞口边坡加强支护；S2、洞口及拱肩范围内超前支护；S3、洞身开挖；S4、混凝土衬砌。本发明，在洞脸边坡揭露不利围岩结构的情况下，进行洞口上部边坡加强支护，并利用锚筋桩在洞脸及拱肩范围进行超前支护，洞口按上下分层，上层按先导洞后两侧的开挖技术，在提高边坡及洞身整体稳定性的前提下安全贯通。
Hole entering construction method for unfavorable surrounding rock structure
一种不利围岩结构处进洞施工方法
CHEN XUEXIANG (author) / CAO XIAOJIE (author)
2025-01-03
Patent
Electronic Resource
Chinese
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