Construction method of enclosure structure with ultra-short underground wall
A construction method and technology of enclosure structure, which are applied in basic structure engineering, soil protection, excavation, etc., can solve problems such as large construction risks, and achieve the effect of reducing engineering risks and costs.
Active Publication Date: 2011-12-21
SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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Problems solved by technology
Even so, judging from the existing project implementation experience, there are still relatively large construction risks in the later shield cutting through the underground wall
Method used
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[0020] The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:
[0021] Such as Figure 1-2 As shown, the labels 1-10 respectively represent: foundation pit 1, shield section 2, ordinary underground wall 3, ultra-short underground wall 4, short underground wall 5, steel cement-soil mixing pile 6, reinforced body 7, steel support 8. Reinforced concrete support 9. Reinforced concrete purlin 10.
[0022] Such as Figure 1-2 As shown, the foundation pit 1 is excavated along the surface road construction plan, and the shield interval section 2 passes through it. According to the length and width of the foundation pit 1, there are several underground walls distributed on both sides of the foundation pit 1. Due to the other Parts (such as two ends) have no influence on the description of the embodime...
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The present invention relates to a foundation pit project in the civil engineering, transportation and construction industry, in particular to a construction method for a foundation pit under which shield section tunnels are crossed, and an enclosure structure with an ultra-short underground wall. The method has the following steps: Every time the trench construction is carried out for the size of the ultra-short underground wall to be built, the bottom of the excavated trench section should be located not less than 0.5m above the top of the shield; The ultra-short underground wall; after that, groove construction is carried out again between the ultra-short underground walls to form a groove section perpendicular to the ultra-short underground wall, and the bottom of the groove section is flush with the bottom of the ultra-short underground wall groove section; The reinforcement cage is placed in the slot section and the concrete is poured to construct the short wall of the horizontal underground wall. The advantage of the present invention is that it can ensure the smooth crossing of the later shield. Compared with the traditional shield passing through the glass fiber reinforced underground wall, the shield The structure does not need to go through the underground wall, which reduces the engineering risk and cost.
Description
technical field [0001] The invention relates to a foundation pit project in the civil engineering, transportation and construction industry, and in particular to a construction method for a foundation pit and an enclosure structure with an ultra-short underground wall, which is used for tunnel crossing construction in a shield section below it. Background technique [0002] In urban transportation construction, it often happens that after the foundation pit structure is excavated on the ground, the shield section tunnel crossing construction is carried out below it. The construction of the foundation pit generally involves the surrounding enclosure structure: the reinforced concrete underground diaphragm wall cast on site, and usually in order to ensure the overall stability of the foundation pit during excavation, the insertion ratio of the underground wall is generally greater than 0.7. In other words, the tunnel boring machine will need to drill through the underground wa...
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IPC IPC(8): E02D17/02E02D5/18E02D3/12
Inventor 陈鸿解蕾唐冬梅冯云叶蓉季应伟奚程磊
Owner SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE