Steel spring floating slab construction method based on line tunnel concentric tunnel

Abstract

The invention belongs to the technical field of subway steel spring floating slab ballast beds and especially relates to a steel spring floating slab construction method based on the line tunnel concentric tunnel. The method comprises the steps of construction preparation, foundation construction pre-laying, ballast bed laying construction, ballast bed pouring and jacking operation, and the ballast bed laying construction is completed through a reinforcement cage track panel method construction process. The method has the following beneficial effects: the method has the advantages that the construction process is optimized, the mechanical use efficiency is improved, the engineering cost is saved, the construction quality is guaranteed, unified scheduling, reasonable planning, orderliness and controllability are achieved, the problems of fine control over the concentric offset of the line tunnel and the complex process are effectively solved, the contradiction between the construction period and the construction progress of the floating slab is eliminated, the construction period is shortened, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of subway steel spring floating slab track beds, and in particular relates to a steel spring floating slab construction method based on a line-tunnel concentric tunnel. Background technique [0002] With the acceleration of the domestic urbanization process, the mileage of subway lines has also increased, and the vibration and noise reduction of the subway track structure is becoming more and more important. The steel spring floating slab track bed has unique and superior vibration and noise reduction effects, and With the characteristics of good stability, durable structure, easy maintenance of track geometry and small maintenance workload, it has become the best choice for special high-end vibration reduction in urban traffic. At present, with the development of science and technology, the speed requirements for subway operation have also been greatly increased. For example, the operating speed of Chengdu ...

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Problems solved by technology

[0003] In order to solve the problems of increasing the construction of limit stops at high operating speeds, the introduction of the construction of counterweight bosses due to the existence of concentric offsets in line tunnels, and the increase in the number of vibration isolators and the heavy burden of floating slabs, the present invention provides a method based on The steel spring floating slab construction method of the line-tunnel concentric tunnel has the advantages of optimizing the construction process, improving the efficiency of machinery use, saving engineering costs and ensuring the construction quality. Solved the problem of fine control of the concentric offset of the line tunnel and complex process

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