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A platform for research: civil engineering, architecture and urbanism
Tunnel portal section edge and front slope miniature steel pipe pile-anchor rod support tunnel-entering construction method
The invention discloses a tunnel portal section edge and front slope miniature steel pipe pile-anchor rod support tunnel entering construction method, relates to the technical field of tunnel construction, and aims to prevent and support the edge and front slope instability condition at a tunnel portal, a large number of anchoring type support structures are applied, and miniature steel pipe piles are convenient to construct, simple in structure and flexible in arrangement; however, the miniature steel pipe piles in engineering are prone to bending shear damage. The invention provides a tunnel portal section edge and front slope miniature steel pipe pile-anchor rod support tunnel entering construction method. The method comprises the steps that miniature steel pipe piles are constructed, and a top beam is poured; cutting the side slope; along with step-by-step excavation of the side slope, a waist beam and an anchor rod are constructed; advanced large pipe shed construction; and pile breaking and full-section excavation are carried out. The pre-stressed anchor rods and the miniature steel pipe piles are stressed together to resist landslide thrust, the slope reinforcing effect is enhanced, passive stress is changed into active stress, the structural stress is more reasonable, the engineering difficulty of pile breaking and hole entering is reduced, meanwhile, hole opening ground surface settlement and surrounding rock deformation are reduced, and the supporting and retaining slope does not collapse.
本发明公开了一种隧道洞口段边仰坡微型钢管桩‑锚杆支护进洞施工方法，涉及隧道施工技术领域，对于隧道洞口处的边仰坡失稳情况的预防支护，大量运用锚固式支护结构，微型钢管桩施工方便、结构简单、布置灵活，但是工程中的微型钢管桩易发生弯剪破坏。本发明提供了一种隧道洞口段边仰坡微型钢管桩‑锚杆支护进洞施工方法，包括：施做微型钢管桩、浇筑冠梁；边坡切坡；随着边坡的逐级开挖，施做腰梁与锚杆；超前大管棚施工；破桩、全断面开挖。预应力锚杆与微型钢管桩共同受力来抵抗滑坡推力，增强边坡加固效果，改被动受力为主动受力，使结构受力更加合理，减小破桩进洞的工程难度，同时减小洞口地表沉降、围岩变形，且支挡边坡不滑塌。
Tunnel portal section edge and front slope miniature steel pipe pile-anchor rod support tunnel-entering construction method
The invention discloses a tunnel portal section edge and front slope miniature steel pipe pile-anchor rod support tunnel entering construction method, relates to the technical field of tunnel construction, and aims to prevent and support the edge and front slope instability condition at a tunnel portal, a large number of anchoring type support structures are applied, and miniature steel pipe piles are convenient to construct, simple in structure and flexible in arrangement; however, the miniature steel pipe piles in engineering are prone to bending shear damage. The invention provides a tunnel portal section edge and front slope miniature steel pipe pile-anchor rod support tunnel entering construction method. The method comprises the steps that miniature steel pipe piles are constructed, and a top beam is poured; cutting the side slope; along with step-by-step excavation of the side slope, a waist beam and an anchor rod are constructed; advanced large pipe shed construction; and pile breaking and full-section excavation are carried out. The pre-stressed anchor rods and the miniature steel pipe piles are stressed together to resist landslide thrust, the slope reinforcing effect is enhanced, passive stress is changed into active stress, the structural stress is more reasonable, the engineering difficulty of pile breaking and hole entering is reduced, meanwhile, hole opening ground surface settlement and surrounding rock deformation are reduced, and the supporting and retaining slope does not collapse.
本发明公开了一种隧道洞口段边仰坡微型钢管桩‑锚杆支护进洞施工方法，涉及隧道施工技术领域，对于隧道洞口处的边仰坡失稳情况的预防支护，大量运用锚固式支护结构，微型钢管桩施工方便、结构简单、布置灵活，但是工程中的微型钢管桩易发生弯剪破坏。本发明提供了一种隧道洞口段边仰坡微型钢管桩‑锚杆支护进洞施工方法，包括：施做微型钢管桩、浇筑冠梁；边坡切坡；随着边坡的逐级开挖，施做腰梁与锚杆；超前大管棚施工；破桩、全断面开挖。预应力锚杆与微型钢管桩共同受力来抵抗滑坡推力，增强边坡加固效果，改被动受力为主动受力，使结构受力更加合理，减小破桩进洞的工程难度，同时减小洞口地表沉降、围岩变形，且支挡边坡不滑塌。
Tunnel portal section edge and front slope miniature steel pipe pile-anchor rod support tunnel-entering construction method
一种隧道洞口段边仰坡微型钢管桩-锚杆支护进洞施工方法
SHEN ZHEN (author) / DING LIBO (author) / GUO JINHAO (author) / ZHANG LIANG (author) / SONG ZHANPING (author) / JIANG HAITAO (author) / ZHANG LU (author) / WANG FUHUA (author) / DU YUNFENG (author) / DAI FAMING (author)
2024-12-13
Patent
Electronic Resource
Chinese
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