Temporary transition device and construction method for subway track laying side passage

Abstract

The invention relates to the field of track engineering technology, in particular to a temporary transition device for a subway track laying passage and a construction method, comprising a plurality of groups of steel support structures, each group of steel support structures comprising two symmetrically arranged steel supports, the steel supports consisting of columns, top supports, pads and bottom plates, the tops of the columns being provided with top supports for supporting sleepers, the top supports being provided with pads, the bottoms of the columns being provided with the bottom plates, the bottom plates being in an arc shape adapted to subway tunnels, and mutually intersecting threaded steel bars being provided between the two steel supports of each group of steel support structures, compared with the prior art, the invention has a simple and feasible combined structure, is easy to install and disassemble, and has the advantages that: the steel support temporary transition device is simple to install and disassemble, is easy to disassemble and can be recycled; the steel supports have high control accuracy on the transition section track state, have good support stability, and can adjust the track state according to the sinking value; the temporary transition section is simple to construct using steel supports, generates less garbage, and is convenient for transition construction.

Description

Technical Field

[0001] The invention relates to the technical field of track engineering, in particular to a temporary transition device for a subway track-laying side passage and a construction method. Background Art

[0002] In the construction of urban rail transit projects, track laying is a key link between the previous and the next. The completion of the track laying nodes will directly affect the progress of system engineering and electromechanical installation, and then affect the opening schedule of the entire line. After the construction of the underground line section is completed, the use of the freezing method to construct the bypass is difficult and time-consuming, and the settlement of the front and rear structures of the bypass is unstable, so the overall roadbed construction cannot be carried out. Therefore, in order to ensure the overall roadbed construction quality and track status, a temporary transition method must be adopted. The temporary transition track line status must meet the safety of the track composed of rail cars and platform cars, and the roadbed concrete transport train under heavy load, which places high requirements on the temporary transition support system.

[0003] At present, concrete piers and other methods are used for transition at the bypass. After the bypass construction is completed and the structural settlement is stable, the overall roadbed construction of the temporary transition section is required. The temporary concrete piers need to be chiseled out and cleaned. The construction period is long and the cleaning is difficult. Therefore, it is a very urgent topic to study the temporary transition plan of the railway track laying bypass. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and provide a temporary transition device and construction method for a subway track laying side passage to form an overall support system to support sleepers, rails and rail transport trains, so that the track row and ballast concrete transport train composed of a rail car and a platform car can pass through the temporary transition track line under heavy load without the need to construct temporary concrete piers.

[0005] In order to achieve the above-mentioned purpose, a temporary transition device for a subway track laying side passage is designed, which is arranged in a subway tunnel and includes several groups of steel support structures. Each group of steel support structures includes two symmetrically arranged steel supports, and the steel supports are composed of columns, top supports, pads and bottom plates. The top of the column is provided with a top support for supporting the sleeper, and the top support is provided with a pad. The bottom end of the column is provided with the bottom plate, and the bottom plate is in an arc shape adapted to the subway tunnel. Crossed threaded steel bars are provided between the two steel supports of each group of steel support structures, and longitudinal threaded steel bars are provided on the outer sides of the several groups of steel support structures.

[0006] The present invention also has the following preferred technical solutions:

[0007] Each group of the steel support structure includes two left and right steel supports, a first threaded steel bar is connected between the bottom of the top support of the left steel support and the upper part of the bottom plate of the right steel support, and a second threaded steel bar is connected between the bottom of the top support of the right steel support and the upper part of the bottom plate of the left steel support.

[0008] A groove is provided on the top of the top support, and the groove is used to accommodate the backing plate and the support sleeper.

[0009] The pad is made of rubber material.

[0010] Each group of steel support structures includes two left and right steel supports. The outer side of the left steel support of several groups of steel support structures is provided with a first longitudinal threaded steel bar, and the outer side of the right steel support of several groups of steel support structures is provided with a second longitudinal threaded steel bar.

[0011] The bottom plate is provided with through holes for connection with the subway tunnel by means of bolts.

[0012] The present invention also provides a construction method using the temporary transition device for the subway track laying side channel, and the method is specifically described as follows: the bottom of the steel support is fixed to the tunnel with an arc bottom plate with the same radius as the circular tunnel, a rubber pad is placed in a U-shaped groove arranged on the top of the steel support to support the long sleeper, and threaded steel bars that cross each other are welded between the steel supports under the left and right rails of the same section, and longitudinal threaded steel bars are welded in the longitudinal direction on the outside of the steel support structure to form an overall support system, thereby ensuring that the steel support structure meets the load requirements of the rail transportation train.

[0013] Preferably, after the bypass construction is completed and the settlement is stable, the temporary steel supports and connecting steel bars are removed, the garbage under the track is cleaned up, and the integral roadbed of the temporary transition section is poured.

[0014] Preferably, regular monitoring is performed while the train is running in the temporary transition section, and the track is adjusted to the required height by replacing rubber pads of different thicknesses.

[0015] Advantageous Effects of the Invention

[0016] Compared with the prior art, the present invention has a simple and feasible combined structure, is easy to install and disassemble, and has the following advantages:

[0017] 1. The steel support temporary transition device is simple to install and remove, easy to dismantle, and can be recycled.

[0018] 2. The steel support has high control accuracy on the track state of the transition section, good support stability, and can adjust the track state according to the sinking value.

[0019] 3. The temporary transition section uses steel supports, which is simple to construct, generates less garbage, and facilitates transition construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a temporary transition section of the present invention in one embodiment;

[0021] FIG2 (a) is a schematic diagram of the composition structure of a steel support of the present invention in one embodiment;

[0022] FIG2( b ) is a side view of a steel support of the present invention in one embodiment;

[0023] FIG2( c ) is a bottom plan view of a steel support of the present invention in one embodiment;

[0024] FIG2( d ) is a plan view of a jacking of a steel support of the present invention in one embodiment;

[0025] Figure 3 is a schematic diagram of a rubber pad of the present invention in one embodiment;

[0026] Figure 4 is a schematic plan view of the installation of a temporary transition device of the present invention in one embodiment;

[0027] In the figure: 1. Rail 2. Sleeper 3. Steel support 3-1. Column 3-2. Top support 3-3. Bottom plate 4. Expansion bolt 5. Rubber pad 6. Cross threaded steel bar 6-1. First threaded steel bar 6-2. Second threaded steel bar 7. Longitudinal threaded steel bar 8. Bypass. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings, and the structure and principle of the device and method are very clear to people in the field. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] The present embodiment provides a temporary transition device for a subway track laying side passage, which is arranged in a subway tunnel and includes several groups of steel support structures, each group of steel support structures includes two symmetrically arranged steel supports, the steel supports are composed of columns, top supports, pads and bottom plates, the top of the columns are provided with top supports for supporting sleepers, the top supports are provided with pads, the bottom of the columns are provided with the bottom plates, the bottom plates are in an arc shape adapted to the subway tunnel so as to fit the subway tunnel setting, mutually intersecting threaded steel bars are provided between the front sides and the rear sides of the two steel supports of each group to form cross-threaded steel bars, the present embodiment In the formula, each group of the steel support structure includes two left and right steel supports, a first threaded steel bar is connected between the bottom of the front side of the top support of the left steel support and the upper part of the front side of the bottom plate of the right steel support, and a second threaded steel bar is connected between the bottom of the front side of the top support of the right steel support and the upper part of the front side of the bottom plate of the left steel support, so as to form a cross threaded steel bar; similarly, a first threaded steel bar is connected between the bottom of the rear side of the top support of the left steel support and the upper part of the rear side of the bottom plate of the right steel support, and a second threaded steel bar is connected between the bottom of the rear side of the top support of the right steel support and the upper part of the rear side of the bottom plate of the left steel support. In addition, longitudinal threaded steel bars are welded to the outside of the several groups of steel support structures.

[0030] During actual construction, the vertical height between the bottom of the sleeper and the tube wall of the subway tunnel is first calculated on the drawing. Every three sleepers form a group of support units. The steel support structure is arranged on the lower side of the first sleeper and the third sleeper. The second sleeper is suspended between the first sleeper and the second sleeper through the connection with the rail. Statistics are counted and sorted out. The materials and quantities of steel supports that need to be processed are processed, and steel supports of different lengths are processed. The steel supports are used to bear the track line load. The steel supports are vertically arranged on the bottom surface of the sleeper under the rail. The bottom of the steel support is welded into an arc-shaped iron plate with the same radius as the circular tunnel and fixed with expansion bolts. A U-shaped groove is arranged on the top of the steel support and rubber pads of different specifications are padded according to height requirements to support the long sleeper. The setting direction of the U-shaped groove is perpendicular to the setting direction of the track, that is, in the same direction as the setting direction of the sleeper. The steel supports under the left and right rails of the same section are cross-connected with steel bars. Two steel bars are used on the outside of each longitudinal front and rear steel support, that is, the first longitudinal threaded steel bar and the second longitudinal threaded steel bar are welded and connected on the outside to form an overall support system to ensure that the steel support meets the load requirements of the rail transportation train. After the bypass construction is completed and the settlement is stable, the temporary steel supports and connecting steel bars are removed, the garbage under the track is cleaned up, the track state is adjusted as required, and the temporary transition section integral roadbed is cast.

[0031] Example 1

[0032] This embodiment provides a construction method using the steel support structure, wherein holes of φ25 mm are set at the four corners of the bottom plate, and the steel support is fixed to the pipe wall of the subway tunnel with expansion bolts. Then, rubber pads of different specifications are placed on the top support according to the height requirements. The top support is placed at the bottom of the sleepers under the left and right rails of the track line. Two threaded steel bars with a diameter of 16 mm are symmetrically cross-welded on the steel support in the same section, and two threaded steel bars with a diameter of 16 mm are welded to the steel support in the longitudinal direction.

[0033] Specifically, see Figure 1 Combined with Figure 2 (a), Figure 2 (b), Figure 2 (c) and Figure 2 (d), the steel support is composed of a column, a base plate and a top support, wherein the column is made of 25#B I-beam, the column base plate is made of a 10mm thick arc steel plate with the same radius as the tube wall, and the top support is welded with a U-shaped groove 10mm thick steel plate, and the column, base plate and top support are welded into a steel support integral device. Referring to Figure 2 (c), a φ25mm hole is set at each of the four corners of the column base plate. The temporary transition section is installed with a steel support structure of appropriate height according to the design elevation and fixed in place, and the steel support of the corresponding height is transported to the temporary transition section and placed in the corresponding position, and fixed to the tube wall with expansion bolts. Every three sleepers constitute a support unit, and the steel support structure is set on the lower side of the first sleeper and the third sleeper.

[0034] See also Figure 1 In the same section of each set of steel support structure, two 16mm diameter threaded steel bars are symmetrically cross-welded on the steel support, and two 16mm diameter threaded steel bars are welded on both sides of the steel support structure longitudinally.

[0035] See also Figure 3 , rubber pads of different specifications are set on the top support of the steel support column. The specifications of the rubber pads are 3mm, 5mm, 8mm, 10mm and 12mm respectively. The main function of the rubber pads is to protect the bottom of the sleeper from being damaged by the steel support top support and to adjust the height of the structure during the construction of the bypass. Figure 4 , regular monitoring is carried out when the train is running in the temporary transition section. If the track sinks, different types of rubber pads are used to adjust the track condition.

[0036] See also Figure 4 After the bypass construction is completed and the structure settlement is stable, the temporary steel supports and threaded steel bars are removed, the garbage in the temporary transition section is cleaned up, and the track status is adjusted as required before pouring the overall roadbed of the temporary transition section.

Claims

1. A temporary transition device for a subway track laying passage, arranged in a subway tunnel, characterized in that: It comprises several groups of steel support structures, each group of steel support structures comprises two symmetrically arranged steel supports, the steel supports are composed of columns, top supports, pads and bottom plates, the top of the columns are provided with top supports for supporting sleepers, the top supports are provided with pads, the bottom of the columns are provided with the bottom plates, the bottom plates are in an arc shape adapted to the subway tunnel, cross-threaded steel bars are provided between the two steel supports of each group of steel support structures, and longitudinal threaded steel bars are provided on the outer sides of the several groups of steel support structures; Each group of the steel support structure comprises two left and right steel supports, a first threaded steel bar is connected between the bottom of the top support of the left steel support and the upper part of the bottom plate of the right steel support, and a second threaded steel bar is connected between the bottom of the top support of the right steel support and the upper part of the bottom plate of the left steel support; A groove is provided on the top of the top support, and the groove is used to accommodate the backing plate and the support sleeper.

2. The temporary transition device for the subway track laying side passage according to claim 1, characterized in that: The pad is made of rubber material.

3. The temporary transition device for a subway track laying side passage as claimed in claim 1, characterized in that: The outer sides of the steel supports on the left side of the several groups of steel support structures are provided with first longitudinal threaded steel bars, and the outer sides of the steel supports on the right side of the several groups of steel support structures are provided with second longitudinal threaded steel bars.

4. The temporary transition device for a subway track laying side passage as claimed in claim 1, characterized in that: The bottom plate is provided with through holes for connection with the subway tunnel by means of bolts.

5. A construction method using the temporary transition device for a subway track laying side passage as claimed in claim 1, characterized in that: The method is specifically as follows: the bottom of the steel support is fixed to the tunnel with an arc bottom plate having the same radius as the circular tunnel, a rubber pad is placed in a U-shaped groove on the top of the steel support to support the long sleeper, threaded steel bars that cross each other are welded between the steel supports under the left and right rails of the same section, and longitudinal threaded steel bars are welded in the longitudinal direction on the outside of the steel support structure to form an overall support system, thereby ensuring that the steel support structure meets the load requirements of rail transportation trains.

6. The construction method of the temporary transition device for the subway track laying side passage according to claim 5, characterized in that: After the bypass construction is completed and the settlement is stable, the temporary steel supports and connecting steel bars are removed, the garbage under the track is cleaned up, and the temporary transition section integral roadbed is poured.

7. The construction method of the temporary transition device for the subway track laying side passage according to claim 5, characterized in that: Regular monitoring is carried out when trains are running in the temporary transition section, and the track is adjusted to the required height by replacing rubber pads of different thicknesses.

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