Staged and movable subway interval tunnel shield segment reinforcing method
A technology for shield segments and interval tunnels, which is applied in tunnels, tunnel linings, roads, etc., can solve the problems of difficult precise positioning, limited reinforcement effect, and inability to form a closed full ring, so as to reduce project cost, save project cost, The effect of shortening the reinforcement construction period
Inactive Publication Date: 2020-12-11
绍兴市柯桥区轨道交通集团有限公司 +3
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Problems solved by technology
Since it is difficult to accurately locate the sensitive section to external interference during construction, when the segment is reinforced after the tunnel is completed, only a half-ring reinforcement can be carried out on the part above the ballast bed, and a closed full ring cannot be formed, and the reinforcement effect is limited
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[0033] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
[0034] Such as figure 1The arc-shaped member is shown, and the arc-shaped member can be made of Q235B, high-strength fiber and other composite materials closely attached to the shield segment lining. The arc-shaped member 2 and the detachable arc-shaped members 3, 4, 5, 6, 7 on the upper part of the ballast bed; the thickness of each segment is 30mm, and the width of the embedded arc-shaped member 2 in the lower part of the ballast bed is 1.2m (compared with the shield machine The width of the segment is the same), and the width of the detachable arc-shaped members 3-7 on the upper part of the ballast bed is 1.0m (reserve an operating space for the embedded channel); bolt holes are reserved at both ends of the members to facilitate the connection and closure of the arc-shaped members Form a whole ring structure;
[0035] Such as figure 2 As shown, th...
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Abstract
The invention relates to a staged and movable subway interval tunnel shield segment reinforcing method. During subway interval tunnel construction, an arc-shaped component is pre-buried between a shield segment and a ballast bed in advance, and the arc-shaped component and the ballast bed are integrally poured; arc-shaped components are also adopted for the shield segment at the part above the ballast bed of a section subjected to external interference, and the arc-shaped components and the pre-buried arc-shaped component are connected and closed to form a whole-ring structure, so that a reinforcing effect is achieved; and after external interference factors are eliminated, the arc-shaped components at the parts above the ballast bed can be detached and moved to a next section to continueto conduct reinforcement. Due to the fact that external interference factors are uncertain, the ballast bed lower-portion pre-buried arc-shaped component and the ballast bed upper-portion detachable arc-shaped components are adopted for reinforcing in a staged manner, and therefore corresponding positions can be selected according to actual external interference to reinforce the segment, the reinforcing construction period is shortened, and the construction cost is greatly reduced.
Description
technical field [0001] The invention relates to the technical field of urban rail transit construction, and is particularly suitable for a method for reinforcing subway shield section tunnels. Background technique [0002] At present, with the rapid development and construction of urban rail transit, subway tunnels are inevitably affected by the construction of adjacent buildings. When constructing in the vicinity of the subway tunnel, the excavation of the existing covering soil and the construction of the bridge pile foundation may affect the deformation of the subway tunnel. Problems such as elevation and geometric dimensions that do not meet the requirements of track operation have an impact on the normal operation of the subway. [0003] In the prior art, there are mainly two types of protection technologies for the stability of existing subway shield tunnels adopted in the case of adjacent construction. One is to take measures during the adjacent construction process...
Claims
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Login to View More IPC IPC(8): E21D11/12E21D11/08E01B1/00
CPCE21D11/12E21D11/08E01B1/00
Inventor 何峰徐永祥傅承诚时瑾陈叶丰吕含冰章治洲崔信为寿飞浩魏征徐凌雁庄鹏陈玉起
Owner 绍兴市柯桥区轨道交通集团有限公司