Testing method for laying ballastless tracks in early stage before overall completion of super long tunnel

A ballastless track and tunnel construction technology, applied in tunnels, mining equipment, measuring devices, etc., can solve problems such as ballastless track cannot be smoothly connected, rework, engineering correction, etc., to improve construction measurement accuracy, ensure smoothness and same time linear effect

Active Publication Date: 2011-09-07
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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Problems solved by technology

If the ballastless track is laid according to the construction center line of the already penetrated section, it will not be able to connect smoothly with the ballastless track laid in the next section, or even cannot be adjusted at all, which m

Method used

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  • Testing method for laying ballastless tracks in early stage before overall completion of super long tunnel
  • Testing method for laying ballastless tracks in early stage before overall completion of super long tunnel
  • Testing method for laying ballastless tracks in early stage before overall completion of super long tunnel

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Embodiment Construction

[0041] specific implementation plan

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] The invention is applied in the construction plan of segmented construction in the construction of super-long tunnels. Multiple inclined shafts are set along different sections of the main tunnel to increase the excavation section. In addition to excavating from the openings at both ends of the tunnel, a construction team is also set up to excavate from various inclined shafts, divide the long tunnel into several sections, and realize two-way construction of each section; Starting from both ends, the ballastless track is laid in advance in the tunnel segment that has been penetrated. Such a construction plan can not only shorten the tunnel construction period, but also improve construction safety.

[0044] The prerequisite for the laying of ballastless track before the overall penetration of the tu...

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Abstract

The invention relates to a testing method for laying ballastless tracks in the early stage before overall completion of a super long tunnel. In the traditional tunnel construction method, a tunnel is dug in two directions both from the left cave and the right cave; and tracks are laid after the tunnel is finished; and the traditional construction method has the disadvantages of low construction progress, long construction period, low efficiency and risks of potential safety hazards. In the invention, multiple inclined shafts are arranged along the direction of a main cave; with the inclined shafts as a boundaries, the main cave construction is carried out in two directions by sections and the ballastless tracks are laid before the cave is dug through; a horizontal control network and a vertical control network are established to carry out measurement and data acquisition, the mathematical model of curve fitting is used to carry out centerline fitting so as to confirm the deviation between a through centerline and a theoretical centerline and carry out assessment to determine theoretical position of the centerline of sections dug through latterly; tracks of the through sections arelaid according to the fitted centerline, the sections under construction are measured and guided according to the fitted centerline to ensure that the centerline of the sections dug through latterly is consistent to the centerline of the sections with tracks laid. The method greatly accelerates construction progress and ensures smoothness and collinearity of the tracks laid in the early stage.

Description

technical field [0001] The invention relates to a method for laying a ballastless track in advance before the overall penetration of an extra-long tunnel. Background technique [0002] In the construction of railway projects, the method often used in tunnel construction is the drill and blast method. A professional mechanized construction team is arranged at the entrance and exit of the tunnel to complete the excavation of the entrance and the construction of the entrance to carry out two-way excavation of the tunnel. After the tunnel is completely penetrated and the penetration error is adjusted, the construction of the ballastless track for all sections of the tunnel will start, and the construction of other facilities in the tunnel will start. For longer tunnels or even extra-long tunnels, such a construction plan and construction arrangement have slow construction progress, long construction period, low work efficiency, and the construction location is far away from the ...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/14G01C5/00
Inventor 付宏平潘正风陈新焕金立新冯威陈金光
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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