A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of shallow-buried unsymmetrical-pressure ultra-small clear distance tunnel portal section structure
The invention discloses a construction method of a shallow-buried unsymmetrical-pressure ultra-small-clear-distance tunnel portal section structure. The construction method comprises the steps that S1, a side slope is excavated; s2, side slope supporting is conducted, specifically, after excavation of the side slope of the tunnel portal section is completed, net hanging shotcrete anchor supporting is conducted on the slope surface; s3, an unsymmetrical pressure retaining wall is constructed at the unsymmetrical pressure position of the tunnel portal section; s4, constructing a protective arch; according to the method, construction of the bias retaining wall and the protective arch is combined at the position of the shallow-buried bias ultra-small clear distance tunnel portal section, large brushing and excavation of a side slope can be avoided in the construction process, excavation and outward transportation of earth and stone at the tunnel portal and side slope protection are reduced, and stability of a mountain is ensured; meanwhile, the damage to the original landform is reduced, and the natural landscape of the hole is protected; the construction cost is effectively reduced, the construction period is effectively shortened, and the structure design is reasonable and construction is convenient.
本发明公开了一种浅埋偏压超小净距隧道洞口段结构的施工方法，包括步骤S1.开挖边坡；步骤S2.边坡支护，在隧道洞口段边坡开挖完成后，对坡面采用挂网喷锚支护；步骤S3.在隧道洞口段偏压处进行偏压挡土墙施工；步骤S4.护拱施工；本方法浅埋偏压超小净距隧道洞口段位置将偏压挡土墙与护拱施工相结合，在施工过程中可以避免对边坡的大刷大挖，减少了隧道洞口土石方开挖、外运及边坡防护，确保了山体稳定；同时减少了对原地貌的破坏，保护了洞口自然景观；有效减少了施工成本与工期，具有结构设计合理和施工方便的特点。
Construction method of shallow-buried unsymmetrical-pressure ultra-small clear distance tunnel portal section structure
The invention discloses a construction method of a shallow-buried unsymmetrical-pressure ultra-small-clear-distance tunnel portal section structure. The construction method comprises the steps that S1, a side slope is excavated; s2, side slope supporting is conducted, specifically, after excavation of the side slope of the tunnel portal section is completed, net hanging shotcrete anchor supporting is conducted on the slope surface; s3, an unsymmetrical pressure retaining wall is constructed at the unsymmetrical pressure position of the tunnel portal section; s4, constructing a protective arch; according to the method, construction of the bias retaining wall and the protective arch is combined at the position of the shallow-buried bias ultra-small clear distance tunnel portal section, large brushing and excavation of a side slope can be avoided in the construction process, excavation and outward transportation of earth and stone at the tunnel portal and side slope protection are reduced, and stability of a mountain is ensured; meanwhile, the damage to the original landform is reduced, and the natural landscape of the hole is protected; the construction cost is effectively reduced, the construction period is effectively shortened, and the structure design is reasonable and construction is convenient.
本发明公开了一种浅埋偏压超小净距隧道洞口段结构的施工方法，包括步骤S1.开挖边坡；步骤S2.边坡支护，在隧道洞口段边坡开挖完成后，对坡面采用挂网喷锚支护；步骤S3.在隧道洞口段偏压处进行偏压挡土墙施工；步骤S4.护拱施工；本方法浅埋偏压超小净距隧道洞口段位置将偏压挡土墙与护拱施工相结合，在施工过程中可以避免对边坡的大刷大挖，减少了隧道洞口土石方开挖、外运及边坡防护，确保了山体稳定；同时减少了对原地貌的破坏，保护了洞口自然景观；有效减少了施工成本与工期，具有结构设计合理和施工方便的特点。
Construction method of shallow-buried unsymmetrical-pressure ultra-small clear distance tunnel portal section structure
一种浅埋偏压超小净距隧道洞口段结构的施工方法
SHEN QI (author) / ZHANG LIJUN (author) / HE XINHE (author) / HE QIN (author) / LIU YI (author) / HUANG LINZHEN (author) / ZHOU PENG (author) / LI XIANG (author) / DENG XIAOQIN (author) / ZHOU JIE (author)
2023-02-03
Patent
Electronic Resource
Chinese
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