A kind of construction method of inverted arch filling integral pouring

A technology of integral pouring and construction method, applied in earth-moving drilling, shaft equipment, wellbore lining, etc., can solve problems such as line deformation, reduce investment, improve early strength, and resist repeated impact and vibration.

Active Publication Date: 2021-11-05
SANCHU OF CHINA RAILWAY TUNNEL GROUP
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AI Technical Summary

Problems solved by technology

The side ditch water will enter the filling along the construction joints of the filling layer. In the later operation of the line, due to the repeated dynamic load of the train, it will repeatedly impact and vibrate on the construction joints, destroying the internal structure of the filling layer and causing mud and mud leakage, resulting in line deformation and other quality problems. Hidden danger

Method used

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  • A kind of construction method of inverted arch filling integral pouring
  • A kind of construction method of inverted arch filling integral pouring
  • A kind of construction method of inverted arch filling integral pouring

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specific Embodiment approach 1

[0036] Specific implementation mode one: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, this specific embodiment adopts the following technical scheme: after the tunnel invert 52 is excavated and supported, the invert 52 and the filling part 56 are closed to the design position at one time by using the filling formwork and the trestle 30 according to the design size, realizing One-time support process, and then carry out one-time pouring of concrete to the position filled with concrete, that is, the invert 52 and its filling part 56, that is, to realize integral pouring, and cycle operations in sequence until the entire construction work of the tunnel invert 52 is completed. . The operation difficulty is reduced, the concrete filling process is simple and the strength can be guaranteed, which meets the relevant design requirements.

specific Embodiment approach 2

[0037] Embodiment 2: This embodiment is a further limitation of Embodiment 1. The construction method includes the following steps:

[0038] Excavation, ballasting and bottom cleaning of the inverted arch 52: excavate the inverted arch 52 according to the cross-sectional drawing of the design drawing, and clean the inverted arch 52 base after the excavation of the inverted arch 52 to ensure that the inverted arch 52 base has no virtual slag;

[0039] Formwork installation: perform the lining operation of the inverted arch 52 on the base of the inverted arch 52 after slag removal. After the inverted arch 52 lining is completed, select the trestle 30 and one or two sets of inverted arches to fill the integral pouring formwork according to the tunnel type. Complete the installation of the end shaped formwork for the inverted arch and the installation of the integral arc formwork 1 for the side wall to form the integral pouring formwork for the inverted arch filling; the integral pou...

specific Embodiment approach 3

[0043] Embodiment 3: This embodiment is a further limitation of Embodiment 1 or 2. After the formwork is installed, it is necessary to review the structural size of the inverted arch 52 and apply for inspection. After the size compounding and inspection meet the design requirements, Concrete pouring is performed.

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Abstract

The invention relates to a construction method for inverted arch filled monolithic pouring. In the inverted arch construction, the gaps formed after filling the concrete layered pouring, after the impact and vibration of the repeated dynamic load of the train, destroy the internal structure of the filling layer and cause mud and mud leakage, resulting in quality hidden dangers of line deformation. The construction method of the present invention is that after the excavation and support of the inverted arch of the tunnel is completed, according to the design size, the inverted arch is used to fill the integral pouring formwork and the trestle, the inverted arch and the filling part are closed once to the design position, and then the filled concrete is integrally poured, Circulate operation successively until advancing to complete all the construction operations of the tunnel invert. The invention belongs to the field of roads and bridges.

Description

Technical field: [0001] The invention relates to a construction method for filling an inverted arch, belonging to the field of roads and bridges. Background technique: [0002] Due to the large interference between the various processes during the inverted arch filling construction, and due to space constraints, construction progress, and the inability to ensure sufficient curing time for the concrete, the construction quality of the filled concrete is poor, and the construction flatness and internal quality of the concrete are uneven. It is difficult to meet the requirements, so the filling concrete is often poured in layers, and a 30cm leveling layer is reserved, and the reserved leveling layer concrete is applied after the tunnel excavation support and lining construction are completed. After the filling concrete is poured in layers, the overall thickness of the filling layer is weakened, and the upper reserved thickness is generally 30cm. The layered construction joint i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/105
Inventor 鲜国赵勇吴维州李传富周跃峰
Owner SANCHU OF CHINA RAILWAY TUNNEL GROUP
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