Integral ballast bed and tunnel bottom disease control method based on combined support and grouting formwork

Abstract

The invention belongs to the field of settlement control of the overall ballast bed of existing long railway tunnels and the construction field of grouting reinforcement at the bottom of the tunnel. The overall ballast bed and tunnel bottom disease treatment method of support and grouting formwork adopts the construction method of first using the combined steel plate support to support the diseased section of the ballast bed, and then installing grouting formwork on both sides of the diseased section of the ballast bed to carry out disease remediation on the ballast bed and tunnel bottom . The invention organically combines the support in the early stage of disease control construction with the improvement of the grouting effect in the later stage, slows down the impact of the broken ring of the ballast bed and the bottom plate before and after the train passes, effectively fills the broken area at the bottom of the tunnel, and supports the combined steel plate to ensure The complete wrapping of the grout and the supporting steel plate achieves the purpose of quickly supporting the ballast bed in the damaged area at the bottom of the tunnel, controlling the development speed of the disease, and fast and efficient grouting to reinforce the diseased area.

Description

technical field [0001] The invention belongs to the field of settlement control of the integral ballast bed of existing long railway tunnels and the construction field of grouting reinforcement at the bottom of the tunnel, and in particular relates to a grouting reinforcement construction method for disease control of the integral track bed of the railway and the tunnel bottom. Background technique [0002] The integral ballast bed of railway tunnels has the advantages of stable operation, good line smoothness, uniform rigidity, strong durability and small maintenance engineering, and is more and more used in long-distance railway tunnels and urban rail transit in my country. [0003] However, with the passage of tunnel operation time, the increase of railway traffic, the repeated dynamic load of trains, the influence of groundwater and many other factors, the overall ballast bed has problems such as the separation of the ballast bed and the floor, the mud and mud of the ball...

AI Technical Summary

Problems solved by technology

In most cases, the use of ordinary steel plates as temporary supports has problems such as small thickness of the steel plates, inconvenient insertion construction, loose bite between the steel plates, and easy extrusion of the steel plates, which affect the support effect of the inserted steel plates

[0008] Furthermore: the currently commonly used grouting construction methods are all constructed in water ditches and side ditches, and the grouting in the contact area between the ballast bed and the tunnel bottom, the inverted arch or its filling area is not targeted; the fluidity of the grout in the grouting process It is difficult to control, especially in some water-rich areas, the grout flows freely during the grouting process, which can not guarantee the grouting effect, but also pollutes the working environment, resulting in waste of grout

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