KR102212757B1 - Concrete track construction method that can be used suitably for a rapid improvement of ballast track, and concrete slab support device and railway building device for the same - Google Patents

Abstract

Disclosed is a concrete slab support device, which can more quickly replace a ballast track into a concrete track and lift a precast concrete slab to sufficiently absorb vibration and increase vertical strength. The concrete slab support device includes a track pad including a floor plate having a fixing part having a fastening hole fixing the track pad to the concrete roadbed by using a fixing device and a load part supporting a load transmitted from the precast concrete slab, and a reinforcing plate inserting elastic body installed on the load part and configured by having rubber and a plurality of reinforcing plates inserted into a layer at intervals in a vertical direction in the rubber.

Description

Concrete track construction method that can be used suitably for a rapid improvement of ballast track, and concrete slab support device and for the concrete track construction method that can be used suitably for a rapid improvement of gravel tracks. railway building device for the same}

The present invention relates to a concrete tract construction method using precast concrete slab, a concrete slab support device and a railroad laying device therefor.

In general, gravel tracks have a structure that distributes the load of the train to the lower roadbed through rails, fasteners, sleepers, and gravel. Compared to concrete tracks, the initial construction cost is cheaper and repair is easy in case of track misalignment. As a result of vibration, the gravel is broken, and as the location changes, continuous settlement occurs, resulting in a high maintenance cost.

In addition, gravel tracks are negative in environmental aspects such as dust and late-night noise pollution caused by night maintenance when trains are operated after construction, and old gravel tracks are less comfortable than concrete tracks, and gravel fragments on rails as gravel breaks due to vibration. There is also a problem in that the rail and the train vehicle are damaged due to this spatter, which incurs maintenance costs outside the track.

In order to improve the track structure for old gravel tracks, it is reasonable to significantly reduce track maintenance and repair work by replacing the gravel tracks with concrete tracks, but in a poor working environment (lack of working hours, lack of work space, lack of gravel thickness, some places). Due to the impossibility of refining gravel, it is difficult to improve the gravel track with the existing track improvement technology.

The paved track construction method, which is one of the technologies that improves the existing gravel track that is currently running the train into a concrete track, is a method that removes gravel from the gravel track and then injects cement mortar into concrete.From the end of train operation to the start of operation the next day. There is a problem that it is difficult to construct for a short time.

In the case of KORAIL, in order to secure track stability, such as securing train safety operation due to deterioration and deterioration of track facilities on the Gwacheon Line (21km), and providing maintenance efficiency, the'Detailed Design for Track Structure Improvement between Geumjeong and Namtaeryeong on the Gwacheon Line' was implemented and improved. The project is in progress, and the improvement project was promoted by applying the B2S track (Ballasted Track To Slab Track) as an improvement method to the detailed design, but the low construction speed and various construction speeds of about 5m within the train stop time (typically 4 hours) Due to the inability to accommodate on-site conditions and the issue of support for construction equipment by developers, only 1.8km section improvement was implemented from 2013 to 2016.

The B2S system in Seoul Metro has the technology to improve 5-10m within 4 hours, which is the train blocking time, but there is no technology for rapid improvement, and B2S construction equipment is expensive and there is only one in Korea, so there is a limit to field application.

In order to find a solution to this, efforts to improve the gravel track into a concrete track have been continued, but a lot of costs are incurred in the process of the improvement, and a situation in which rapid construction technology to improve the existing operating line into a concrete track has not been secured abroad. .

In order to solve the problems of the prior art as described above, the present inventor developed a track construction method capable of rapidly improving a gravel track into a concrete track, and a concrete slab support device and a railroad laying device for this, and registered No. 10-2122610 (hereinafter , Referred to as "pre-registered invention").

An object of the present invention is to solve the problems of the prior art to diversify a concrete track construction method capable of rapidly improving a gravel track to a concrete track.

Another object of the present invention is a concrete track having superior vibration characteristics and vertical load-bearing stiffness than the pre-registered invention, while the installation process is not complicated, and while at least 20 m of gravel tracks can be quickly replaced with concrete tracks within 4 hours of blocking train operation. It is to provide a concrete track construction method that can provide.

Another object of the present invention is to provide a concrete track that has superior shear force-supporting stiffness than the pre-registered invention, while the installation process is not complicated, and while at least 20 m of gravel tracks can be quickly replaced with concrete tracks within 4 hours, which is the train operation blocking time. It is to provide a concrete track construction method that can be used.

Another object of the present invention is to provide a concrete slab support device and a railroad laying device suitable for the concrete track construction method according to the present invention.

Another object of the present invention is to provide a concrete track construction method for easy replacement of a track pad, a concrete slab support device, and a railroad laying device therefor.

Another object of the present invention is to provide a railroad laying device excellent in buffering performance and support stiffness against loads acting on a concrete slab in the vertical, lateral and rotational directions.

In the concrete slab support device according to the present invention, in the concrete slab support device for supporting the precast concrete slab on which the rail is installed on the concrete roadbed, the precast concrete slab is disposed at an interval on the concrete roadbed. A plurality of track pads spaced upward and elastically supporting; And a fixing mechanism for fixing a plurality of the track pads to the concrete roadbed, wherein the track pad includes a fixing part having a fastening hole for fixing to the concrete roadbed using the fixing mechanism and the precast A floor plate having a load that receives the load transmitted from the concrete slab; And a reinforcing plate-inserting elastic body installed in the load part and including a plurality of reinforcing plates inserted in a layered form at an interval between the rubber and the rubber inside the rubber.

It is preferable that the surface of the bottom plate is surrounded by rubber integrally connected to the rubber.

One side of the fastening hole is preferably opened to the side.

Includes a simplerate mounted on the reinforcing plate inserting elastic body so as to adjust a height supporting the precast concrete slab, and a first incision cut in parallel with the corresponding side at the edges of at least opposite sides of the simplerate It is preferable that the edge cutout plate having both sides cut off by the second cutout cut outward between both ends of the first cutout part has a protrusion formed by bending downward.

The fixing mechanism has a fastening hole formed at a position corresponding to the fastening hole, and is connected to a cover portion covering an upper surface and a portion of both sides of the fixing portion, and extending outwardly and having a bolt hole. Track pad fixing plate having a bolt coupling plate portion; It is preferable to include a first anchor mechanism which is coupled to the concrete roadbed through the bolt hole to fix the track pad fixing plate to the concrete roadbed.

The fixing mechanism may include an angle having a long hole formed at a position corresponding to the fastening hole of the track pad fixing plate that is adjacently fixed; And a second anchor mechanism fixed to the concrete roadbed through the long hole, the fastening hole, and the fastening hole to fix the angle to the concrete roadbed.

The railway laying apparatus according to the present invention includes a precast concrete slab having holes formed in the vertical direction; A shear force support mechanism for preventing the precast concrete slab from moving and rotating laterally and upward by being inserted into the hole and fixed to the concrete roadbed; And a concrete slab support device according to the present invention for elastically supporting the precast concrete slab by being fixed to the concrete roadbed at intervals and spaced upward from the concrete roadbed.

The shearing force supporting mechanism includes: a base plate and a pillar bracket having a pillar protruding upward from the base plate and having a threaded portion; A third anchor mechanism for fixing the base plate to the concrete roadbed; A shear force support block coupled to the periphery of the pillar and supporting between the pillar and the inner surface of the hole to prevent the precast concrete slab from moving lateral and upward and rotating; And a pressing mechanism for pressing the shearing force supporting block downward by being coupled to the threaded portion.

In some cases, the shearing force supporting mechanism includes a base plate and a pillar protruding upward from the base plate, and a pair of slots is formed at a portion facing the upper end of the pillar, and a bottom portion of the pair of slots A pillar bracket installed across the pillar and having a fastening hole formed therein; A third anchor mechanism for fixing the base plate to the concrete roadbed; A shear force support block coupled to the periphery of the pillar and supporting between the pillar and the inner surface of the hole to prevent the precast concrete slab from moving lateral and upward and rotating; And a pressing mechanism for pressing the shear force support block downward through a bolt coupled to the fastening hole.

The pressing mechanism is inserted into the pair of slots having a pressing plate coupled to the outer circumferential surface of the column and mounted on the shearing force support block, and a through hole through which the bolt can pass, and both ends protrude to the outside of the column, respectively. It is preferable to include a pressure bar mounted on the pressure plate and the bolt coupled to the fastening hole through the through hole to press the pressure bar and the pressure plate downward.

It is preferable that a circular cover is installed between the pressure bar and the head of the bolt and has a through hole through which the bolt passes and is inserted into the column.

The hole formed in the precast concrete slab and the shearing force supporting block are formed to become wider from the bottom to the top and have a non-circular cross section, and the shearing force supporting block is spaced vertically between the shearing force supporting rubber and the shearing force supporting rubber. It is preferable to be configured with an insert plate inserted in a layered form.

The shearing force support block is provided with a release mechanism coupling portion, and the pressing mechanism is preferably a ring nut.

It is preferable that the shear force supporting block is divided into two.

In the concrete track construction method according to the present invention, a plurality of track pads for elastically supporting the precast concrete slab by separating it upward from the concrete roadbed are arranged at intervals on the concrete roadbed in the longitudinal direction of the railway. step; A precast concrete slab mounting step of mounting the precast concrete slab having holes formed up and down and having a pair of rails installed in parallel on the plurality of track pads; And installing a shearing force supporting mechanism on the concrete roadbed through the hole to prevent the precast concrete slab from moving and rotating laterally and upward. A track pad fixing step of fixing the track pad to the concrete roadbed using a fixing mechanism, wherein the track pad arranging step includes a fixing part having a fastening hole and a load that receives a load transmitted from the precast concrete slab Arranging the track pad including a bottom plate having a part and a reinforcing plate inserting elastic body installed in the load part and comprising a plurality of reinforcing plates inserted in a layered form at an upper and lower interval in the rubber and the rubber Make a composition that includes.

Before the precast concrete slab mounting step, on the reinforcing plate inserting elastic body, at least at both edges facing each other, a first incision cut parallel to the side and a second incision cut outward between both ends of the first incision It is preferable to include a height adjustment step of adjusting the height and inclination for supporting the precast concrete slab by installing a simple rate having a protrusion formed by bending the edge incision plate at both sides thereof by being bent downward.

In the step of fixing the track pad, a cover portion having a fastening hole formed at a position corresponding to the fastening hole formed in the fixing portion, and a cover portion covering a portion of the upper surface and both side surfaces of the fixing portion, and the cover portion are connected to the lower ends of the both sides of the In a state in which a track pad fixing plate extending by and having a bolt coupling plate portion having a bolt hole is coupled to the fixing portion, a first anchor mechanism is coupled to the concrete roadbed through the bolt hole, so that the track pad fixing plate is attached to the concrete roadbed. It's a good idea to include fixing.

The track pad fixing step may include an angle mounting step of mounting an angle having a long hole formed at a position corresponding to the fastening hole of the track pad fixing plate which is fixed adjacently on the adjacent track pad fixing plate; And an angle fixing step of fixing the track pad fixing plate and the angle to the concrete roadbed by coupling the second anchor mechanism to the concrete roadbed through the long hole, the fastening hole, and the fastening hole.

The installation step of the shearing force support mechanism may include: an anchor bolt fixing step of fixing the anchor bolt of the third anchor mechanism to the concrete roadbed; Fixing a pillar bracket that protrudes upward from the base plate and the pillar bracket having a pillar formed with a threaded portion from the lower side to the upper side, and is coupled to and fixed to the anchor bolt through the hole formed in a non-circular cross section step; A shear force support block that combines a shear force support block formed in a non-circular cross section between the pillar and the inner surface of the hole so as to prevent the precast concrete slab from moving and rotating from the bottom to the top Combining step; And a shearing force supporting block pressing step of pressing the shearing force supporting block downward by coupling a pressing mechanism to the threaded portion.

In some cases, the step of installing the shearing force supporting mechanism may include: an anchor bolt fixing step of fixing the anchor bolt of the third anchor mechanism to the concrete roadbed; It includes a base plate and a pillar protruding upward from the base plate, and a pair of slots is formed at a portion facing the top of the pillar, and a pair of slots is installed across the pillar at the bottom of the pair of slots, and a fastening hole is provided. A post bracket fixing step of fixing the post bracket to which the formed transverse fixing part is fixed to the anchor bolt through the hole formed in a non-circular cross section and gradually wider from the bottom to the top; A shear force support block that combines a shear force support block formed in a non-circular cross section between the pillar and the inner surface of the hole so as to prevent the precast concrete slab from moving and rotating from the bottom to the top Combining step; And a shearing force supporting block pressing step of pressing the shearing force supporting block downward by coupling a pressing mechanism to the fastening hole formed in the transverse fixing portion.

Prior to the step of arranging the track pad, the gravel track may be rapidly replaced with a concrete track including a gravel track removing step of removing rails, sleepers, and gravel in a certain section on the gravel track.

It is preferable to include a rail removing step of removing the rails respectively installed on the plurality of precast concrete slabs, and a long rail installation step of installing a long rail on the plurality of precast concrete slabs from which the rails have been removed.

According to the present invention, since the installation process is not complicated, it is possible to quickly replace a gravel track with a concrete track.

According to the present invention, since a plurality of reinforcing plates are horizontally inserted into the elastic body of the reinforcing plate insertion elastic body of the track pad, the precast concrete slab can be increased to sufficiently absorb vibration and the vertical rigidity can be increased.

According to the present invention, since the shearing force support block includes a rubber and an insert plate inserted in a layered up and down layer inside the rubber, it is possible to absorb vibrations caused by the passage of the train, while providing a large support for shear forces in the transverse direction.

In addition, according to the present invention, the shear force support block has a separation mechanism coupling part, and the shear force support block is divided so that it is easy to install and replace, and a gravel track of at least 20 m within 4 hours, which is the train operation blocking time, is carried out on a concrete track. Can be replaced with

According to the present invention, it is not only easy to replace the track pad, but also it is possible to replace the track pad without removing the anchor bolt installed on the connection part of the precast concrete slab.

According to the present invention, it is possible to buffer the impact force acting on the concrete slab in the vertical, lateral and rotational directions, so that the life of the track is long, the running property of the train is improved, and the maintenance/repair cost is also low.

1 is an exploded perspective view of a concrete slab support device according to the present invention,
2 is a cross-sectional view of the track pad according to II of FIG. 1;
3 is an exploded perspective view showing an angle constituting a part of the fixing mechanism and a second anchor mechanism;
Figure 4 is a perspective view of a simple rate for adjusting the support height and slope of the precast concrete block,
5 is a plan view illustrating a railroad laying device according to the present invention and a state in which a concrete track is installed on a concrete roadbed using the same;
6 is a longitudinal cross-sectional view taken along JJ of FIG. 5,
7 is a cross-sectional view taken along KK of FIG. 5,
8 is an exploded perspective view of a shear force support mechanism,
9 is a cross-sectional view of a shear force supporting block according to LL of FIG. 8;
10 is a process chart for explaining the concrete track construction method according to the present invention,
11 is a side view for explaining a preferred process of rapidly improving a gravel track to a concrete track according to the method of the present invention;
12(a) to 12(g) are views showing an example of a process of replacing a gravel track with a precast concrete slab according to the method of the present invention,
13(a) to 13(g) are views showing a modified example of a process of replacing a gravel track with a precast concrete slab according to the method of the present invention;
14 is an exploded perspective view showing another example of a shear force supporting mechanism,
15 is a perspective view showing a state in which the pressing mechanism is coupled to the column bracket.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a concrete slab support device according to the present invention, and FIG. 2 is a cross-sectional view of a track pad according to I-I of FIG. 1.

The concrete slab support device 100 according to the present invention as shown in FIGS. 1 and 2 is for supporting a precast concrete slab on which a rail is installed on a concrete roadbed, and includes a track pad 110 and a fixing mechanism 120. Have.

As a precast concrete slab, registration number 30-0777856 (name of article: slab for railroad rail, creator: Wonhyo Park et al. 3) disclosed in the Registered Design Gazette 『A hump that fixes the rail fastening device on the top surface is formed, and goes inside. The openings located on the upper surface of the base are formed to be inclined, and the slopes with different inclination angles are formed on the sides.』, Registration No. 30-0778069 (Name of article: Slab for railroad rail, Creator: Wonhyo Park et al. 3) ``The hump for fixing the rail and the rail fastening device is formed on the upper surface, and an opening located on the upper surface of the base is formed to be inclined, and inclined surfaces with different inclination angles are formed on the side, and each corner is formed. It is possible to prevent cracks in the corners where the load of the railroad car is concentrated by rounding the load of the railroad car by round processing.』 or Registration No. 30-0778070 (Name of the item: Slab for railroad rail, creator: Published in the Registered Design Gazette of Wonhyo Park et al.3), a hump that fixes the rail fastening device is formed on the upper surface, and an opening located on the upper surface of the base is formed to be inclined inside, and inclined surfaces with different inclination angles are formed on the side. 'Can be used in the present invention.

The track pads 110 are disposed on the concrete roadbed at intervals of 2 rows, and serve to elastically support the precast concrete slab by separating it upward from the concrete roadbed. This track pad 110 has a bottom plate 111 and a reinforcing plate inserting elastic body 116 provided on one upper surface of the bottom plate 111.

The floor plate 111 is a fixing part 112 having a fastening hole 113 for fixing it to a concrete roadbed using a fixing device 120 and a load part 114 receiving the load transmitted from the precast concrete slab. ) Can be distinguished. One side of the fastening hole 113 formed in the fixing part 112 is open to the side. This is to allow the precast concrete slab to be removed from the bottom of the precast concrete slab and replaced with a new one even when the fastening hole 113 is coupled to the anchor bolt. This will be described in more detail later. The surface of the bottom plate 111 is preferably surrounded by rubber (RU). The fixing part 112 of the bottom plate 111 has a track pad fixing plate 122 constituting the fixing mechanism 120 by making the thickness of the rubber RU formed on the surface thinner compared to other parts of the bottom plate 111. A groove 115 that can be combined is formed. As the bottom plate 111, preferably, a metal plate such as an iron plate or stainless steel plate having a thickness of about 10 mm is suitable, and a thicker plate is used than the reinforcing plate 118 described later.

As shown in FIGS. 1 and 2, a reinforcing plate inserting elastic body 116 is provided on the load portion 114 of the bottom plate 111. The reinforcing plate inserting elastic body 116 is a rubber (RU) integrally connected with the rubber (RU) surrounding the bottom plate 111 and a plurality of reinforcing plates 118 inserted in a layered form at a vertical interval in the rubber (RU). ). As the reinforcing plate 118, a metal plate such as an iron plate or a stainless steel plate thinner than the bottom plate 118, preferably having a thickness of less than half the thickness of the bottom plate 118, is suitable. The reinforcing plate 118 inserted in a layered form inside the rubber RU forms a thin rubber layer 119 between the neighboring reinforcing plates 118. A plurality of reinforcing plates 118 and a plurality of thin rubber layers 119 provided in the reinforcing plate insert elastic body 116 are transmitted from the precast concrete slab by increasing the vertical stiffness to support the load to increase the thickness. While allowing sufficient absorption of the coming vibration, it reduces the amount of compression compared to the total thickness, and increases the resistance to shear forces in the transverse direction. If the rubber is formed thick without the reinforcing plate 118, the amount of expansion and contraction for the vertical load and the shear deformation for the lateral shear force become too large, so it must be used in the form of a thin plate-shaped rubber pad. In this case, vertical vibration due to train passage It is difficult to fully buffer.

The concrete slab support device 100 according to the present invention has a fixing mechanism 120 for fixing a plurality of track pads 110 to a concrete roadbed.

The fixing mechanism 120 fixes the fixing part 112 of the track pad 110 to the concrete roadbed, and includes a track pad fixing plate 122 and a first anchor mechanism 126. The track pad fixing plate 122 has a fastening hole 123a and is coupled to the groove 115 to cover a portion of the upper surface and both sides of the fixing part 112 at the lower ends of both sides of the cover part 123 and the cover part 123. It is provided with a bolt coupling plate portion 124 extending outward and having a bolt hole (124a). The track pad fixing plate 122 is preferably made by bending a belt-shaped plate in which the fastening holes 123a and the bolt holes 124a are formed, but may be made by casting in some cases. The right and left center fastening holes 123a are formed at positions corresponding to the fastening holes 113. The cover part 123 is inserted into the groove 115 to hold the track pad 110 from moving.

The first anchor mechanism 126 is a set anchor comprising an anchor bolt 126a having an expansion cone formed and an expansion sleeve coupled to the outer circumferential surface and a nut 126b coupled to the anchor bolt 126b. The first anchor mechanism 126 is coupled to a hole drilled in the concrete roadbed by a drill or the like through the bolt holes 124a on both sides of the bolted plate portion 124 so that the track pad fixing plate 122 can be fixed to the concrete roadbed. It is to do. Of course, in some cases, a chemical anchor may be used instead of the set anchor. As a set anchor and a chemical anchor, you can select and use the ones that meet the standard among those on the market.

3 is an exploded perspective view showing an angle constituting a part of the fixing mechanism and a second anchor mechanism. It will be described with reference to FIGS. 1 and 2 together.

The fixing mechanism 120 according to the present invention is preferably for connecting the two track pad fixing plates 122 and the two track pads 110 that are fixed adjacently in addition to those described in FIGS. 1 and 2, and an angle 128 ) And a second anchor mechanism 129 may be further provided. The angle 128 has a long hole 128a formed at a position corresponding to the two fastening holes 123a of the two track pad fixing plates 122 that are adjacently fixed. The long hole 128a makes it possible to easily couple the angles 128 even if there is an error in the distance between the neighboring anchor bolts 126a respectively coupled to the fastening holes 123a of the two adjacent track pad fixing plates 122. As the second anchor mechanism 129, the anchor bolt 129a inserted into the hole drilled in the concrete roadbed through the long hole 128a and the fastening hole 123a and the fastening hole 113 is fixed using a chemical chemical solution. Thus, a chemical anchor that allows the nut 129b to be fastened is suitable. In some cases, a set anchor may be used as the second anchor mechanism 129.

Figure 4 is a perspective view of a simple rate for adjusting the support height and slope of the precast concrete block. This will be described with reference to FIG. 1.

The simplate 130 shown in FIG. 4 is mounted on the reinforcing plate inserting elastic body 116 of the track pad 110 to adjust the support height and inclination of the precast concrete block, at least on both left and right sides. It has a protrusion 132 protruding downward from the edge. It is preferable to form a total of about five protrusions 132 by forming two on the long sides on both sides of the simplate 130 and one on the short side on one side of the simplate 130. Each of the protrusions 132 is cut in both sides by a first cutout 132a cut in parallel with the corresponding side and a second cutout 132b cut outward between both ends of the first cutout 132a. It is preferable that the edge cutting plate 132c is formed by bending downward. In this way, in the process of forming the protrusion 132, deformation of other parts other than the protrusion 132 can be prevented. The inner side of each of the protrusions 132 is caught by the side edge of the reinforcing plate inserting elastic body 116 so that the simplate 130 does not move laterally on the reinforcing plate inserting elastic body 116.

5 is a plan view for explaining a railroad laying device according to the present invention and a state in which a concrete track is installed on a concrete roadbed using the same, FIG. 6 is a longitudinal sectional view according to JJ in FIG. 5, and FIG. 7 is according to KK in FIG. A cross-sectional view, FIG. 8 is an exploded perspective view of a shearing force supporting mechanism, and FIG. 9 is a cross-sectional view of a shearing force supporting block according to LL of FIG. 8. It will be described with reference to FIGS. 1 to 4 together.

The railway laying apparatus 102 according to the present invention is to use the concrete slab support apparatus 100 according to the present invention described above, and described through FIGS. 1 to 4, the track pad 110, the track pad fixing plate 122, It has a first anchor mechanism 126, an angle 128, a second anchor mechanism 129, and a simple rate 130. The explanations for these are the same as previously mentioned, so they are not described in more detail here.

5 to 7, the railway laying apparatus 102 according to the present invention has a precast concrete slab 140 in which holes 142 are formed vertically. Holes 142, preferably, each of the precast concrete slab 140 is formed by two at intervals in the longitudinal direction of the railroad rail (R). In some cases, the number of holes 142 may increase to 3 or 4 depending on the length of the precast concrete slab 140. Referring to FIGS. 5 to 7, the hole 142 is gradually widened from the bottom to the top and has a non-circular cross section.

Railway laying device 102 according to the present invention has a shearing force support mechanism 150. The shear force support mechanism 150 is inserted into the hole 142 and fixed to the concrete roadbed 10 to prevent the precast concrete slab 140 from moving in the lateral and upward directions and rotating.

8 and 9, the shearing force supporting mechanism 150 includes a column bracket 151, a third anchoring mechanism 153, a shearing force supporting block 155, and a pressing mechanism 157.

The pillar bracket 151 has a base plate 151a and a pillar 151c protruding upward from the base plate 151a and having a threaded portion 151b formed thereon. A plurality of through holes 151e for passing the anchor bolts 153a are formed in the base plate 151a. As the pillar 151c, a hollow pillar is preferable. The base plate 151a is inserted through the hole 142 and fixed to the concrete roadbed 10, and is inserted into the hole 142 from the top of the precast concrete slab 140 and passes through the hole 142 to pass the concrete roadbed 10 ) Is formed in a smaller plane area than the hole 142 so that it can be mounted on. The pillar 151c is preferably used in a circular shape so as to form a threaded portion 151b on its outer circumferential surface. A reinforcing member 151d is installed between the base plate 151a and the pillar 151c in order to increase the shear force supporting strength of the pillar 151c.

The third anchor mechanism 153 is for fixing the base plate 151a to the concrete roadbed 10 using an anchor bolt 153a and a nut 153b, and preferably, a chemical chemical solution is used for solid fixing. Chemical anchors are used.

The shear force support block 155 is coupled around the column 151c to support the inner surface of the column 151c and the hole 142 to prevent the precast concrete slab 140 from moving lateral and upward and rotating As with the hole 142, it becomes wider from the bottom to the top and is formed in a non-circular cross-section. As shown in FIG. 9, the shearing force supporting block 155 includes a shearing force supporting rubber 155a and an inserting plate 155b inserted in a layered form at an upper and lower interval in the shearing force supporting rubber 155a. In this case, the stiffness of supporting the shear force in the transverse direction can be increased while being able to sufficiently buffer the vibrations in the vertical direction and the transverse direction transmitted from the train.

In addition, an upper plate 155c made of stainless steel, etc., which is thicker than the insertion plate 155b, preferably twice or more thicker than the insertion plate 155b, is installed on the upper surface of the shearing force support block 155, so that the pressing force of the pressing mechanism 157 described later is The support block 155 can be uniformly applied to the entire cross-section.

Shear force supporting block 155 is preferably formed by dividing into two as shown in Fig. 8, but may be formed integrally, depending on time, may be divided into three or four, and in this case, a reinforcing member ( The installation location or number of installations of 151d) may vary.

In this shear force support block 155, preferably, a release mechanism coupling portion 155d is formed. The release mechanism coupling part (155d) forms a spiral on the inner surface of the through hole to allow the release mechanism to be coupled, thereby leaving the temporary installed shear force support block 155 or opening the shear force support block 155 that needs to be replaced by a hole 142 ) To make it easier to escape from. 9 illustrates that the release mechanism coupling portion 155d is formed in a through hole penetrating up and down, but may be formed in a groove other than the through hole. For example, the release mechanism coupling portion 155d may be formed in a groove slightly deeper than the thickness of the upper plate 155c or the thickness of the upper plate 155c.

The pressing mechanism 157 is coupled to the column 151c to press the shearing force supporting block 155 downward so that the shearing force supporting block 155 compressed downward is compressed to the inner circumferential surface of the hole 142 to be precast concrete slab 140 It is to be able to exhibit resistance against displacement in the lateral direction of ), resistance against displacement in the upward direction, and resistance against displacement in the rotation direction. As the pressing mechanism 157, a ring nut coupled to the threaded portion 151b of the column 151c is suitable. It is preferable to form grooves 157a on the upper surface of the ring nut at intervals so that a tool for locking or unlocking the ring nut can be coupled.

Figure 10 is a process diagram for explaining the concrete track construction method according to the present invention, Figure 11 is a side view for explaining by supplementing a preferred process of rapidly improving the gravel track to the concrete track according to the method of the present invention, Figure 12 (a ) To 12(g) are views showing an example of a process of replacing a gravel track with a precast concrete slab according to the method of the present invention, and FIGS. 13(a) to 13(g) are gravel according to the method of the present invention. It is a diagram showing a modified example of the process of replacing the track with precast concrete slab.

A process of rapidly improving a gravel track to a concrete track by the concrete track construction method according to the present invention will be described with reference to FIGS. 1 to 9 described above.

First, on the track of the concrete track 200 behind the gravel track 30 to be replaced with the concrete track 200, the precast concrete slab ( 140). More preferably, as shown in FIG. 11, the precast concrete slab 140 is mounted and the precast concrete slab 140 is removed from the rail (R), sleepers (S) and gravel (B). The first vehicle 210 on which the crane 212 for moving to 10 is installed is prepared on the concrete track 200 behind the concrete roadbed 10. In addition, a concrete slab support device 100 according to the present invention described with reference to FIGS. 1 to 9, a shearing force support mechanism 150, and a simple rate 130 are prepared together (S1).

As shown in Figure 11, remove the rail (R), sleepers (S) and gravel (B) of a certain section on the gravel track 30 to be replaced with the concrete track 200, and clean the concrete roadbed 10. After cleaning, perform tasks such as changing noodles. Preferably, the rail (R) removed from the rear of the gravel track (30) and a second vehicle (240) for loading the sleepers (S) and gravel (B) are prepared to quickly remove the rail (R), etc. Make sure to clean it up (S2). At this time, preferably, the height for supporting the precast concrete slab 140 is calculated in advance.

If the strength of the concrete roadbed 10 is more than the design standard, for example, 27Mpa, as shown in Fig. 12(a), a plurality of track pads 110 are added to the concrete roadbed 10 in the longitudinal direction of the railway. It is placed on the roadbed 10 at intervals. When the length of the precast concrete slab 140 is 5m, preferably, four track pads 110 are disposed on one side and eight track pads 110 on both sides.

If the strength of the concrete roadbed 10 is less than the design standard, for example, 27Mpa, as shown in FIG. 13(a), the concrete roadbed 10 is drilled and a reinforcing plate using the anchor bolts 153a described in FIG. 152 is provided in advance, and as shown in Fig. 13(b), a plurality of track pads 110 are arranged at intervals on the concrete roadbed 10 in the longitudinal direction of the railway (S3).

In addition, on the reinforcing plate inserting elastic body 116, a simplate 130 having a protruding portion 132 protruding downward as shown in FIGS. 4, 12(b) and 13(c) is installed to provide a precast concrete slab. Adjust the height and slope to support 140. On each reinforcing plate inserting elastic body 116, as many simplates 130 as necessary to support the precast concrete slab 140 to a required height may be installed. The number of simplates 130 installed on each track pad 110 as well as that a plurality of simplates 130 can be mounted in a state of being superimposed on each other by combining them in a layered form through the protrusions 132 May be different (S4).

Next, as shown in Figs. 12(c) and 13(d), the precast concrete slab 140 prepared in advance is mounted on the plurality of track pads 110 (S5). Preferably, as shown in FIG. 11, the precast concrete slab 140 prepared in the first vehicle 210 is mounted on the track pad 110 using the crane 212 installed in the first vehicle 210. . A precast concrete slab 140 with rails (R) installed in advance is mounted for fast concrete track 200 installation.

If there is a part where the height of the rail (R) or precast concrete slab (140) is not correct, slightly lift the precast concrete slab (140) to install an additional simprate 130 or remove the pre-installed simplate 130 can do.

In the state where the precast concrete slab 140 is mounted on the track pad 110, as shown in Figs. 12(c) and 12(d) or 13(d) and 13(e), the column bracket ( 151) is inserted through the hole 142 and fixed to the concrete roadbed 10 (S6). To fix the pillar bracket 151, the concrete roadbed 10 is drilled and a chemical anchor as the third anchor mechanism 153 described above is used.

In more detail, the anchor bolt (153a) of the third anchor mechanism (153) is fixed to the concrete roadbed (10). In some cases, this process may be performed before the process of S5. And the base plate (151a) and the base plate (151a) protruding upward from the column (151c) having a threaded portion (151b) is formed by coupling the pillar bracket 151 to the anchor bolt through the hole 142 to the pillar bracket 151 ) To the concrete roadbed (10).

Then, as can be seen in Figure 12 (d) and Figure 12 (e) or Figure 13 (d) and Figure 13 (e) and Figures 8 and 9, the pillar 151c formed on the pillar bracket 151 Between the outer circumferential surface of the hole 142 and the inner circumferential surface of the hole 142, the shear force supporting block 155 is inserted gradually wider from the bottom to the top and formed in a non-circular cross-section (S7).

Then, by coupling the pressing mechanism 157 to the column 151c to press the shear force support block 155 downward to fix the precast concrete slab 140 to the concrete roadbed 10, the precast concrete slab 140 ) Prevents the side and upward movement and rotation (S8). Preferably, the ring nut as the pressing mechanism 157 is coupled to the threaded portion 151b to adjust the pressing force for pressing the shearing force supporting block 155 downward.

In the case of using a chemical anchor to fix the pillar bracket 151, it takes about 30 minutes for the chemical liquid to harden. Therefore, in the process of S6~S8, it is initially assembled as a temporary assembly, and other precast cones to be installed continuously While performing the process for the Chris slab 140, after the part where the chemical anchor is installed is sufficiently hardened, the pressing mechanism 157 is released, the shear force supporting block 155 is separated from the hole 142, and the third anchor mechanism 153 ) Firmly, inserting the shear force supporting block 155 into the hole 142, and coupling a pressing mechanism 157 such as a ring nut to the threaded portion 151b of the column 151c, and using a separate tool. It is preferable to proceed with the process of S6 ~ S8 as a process of locking the pressing mechanism 157 with a large force.

The precast concrete slab 140 installed in the above process is sufficiently spaced upward from the concrete roadbed 10 by the reinforcement plate inserting elastic body 116 of the track pad 110 and is elastically supported in a state floating in the air. do. The reinforcing plate insertion elastic body 116 has the reinforcement plate 118 horizontally inserted in a layered form, so even if it is formed to a sufficient height of about 200 mm, it can absorb vibrations caused by train operation and prevent the amount of expansion and contraction from becoming larger than necessary. It can and can provide great support in the transverse direction.

On the other hand, as shown in Figs. 12(e) and 13(e) by using the fixing mechanism 120 having the track pad fixing plate 122 and the first anchor mechanism 126 described with reference to FIGS. 1 and 2 The pad 110 is fixed to the concrete roadbed 10 (S9). In more detail, a cover portion 123 that has a fastening hole 123a formed at a position corresponding to the fastening hole 113 formed in the fixing part 112 to cover the upper surface and both sides of the fixing part 112 In a state in which the track pad fixing plate 122 having the bolt coupling plate portion 124 connected to the lower end of both sides of the cover portion 123 and having a bolt hole 124a is coupled on the fixing portion 112, preferably, as a set anchor. The configured first anchor mechanism 126 is coupled to the concrete roadbed 10 through the bolt hole 124a to fix the track pad fixing plate 122 to the concrete roadbed 10.

Then, as shown in FIGS. 12(f) and 12(g) or 13(f) and 13(g) using the angle 128 and the second anchor mechanism 129 described through FIG. The two track pad fixing plates 122 and the two track pads 110 at the connection portion to which the two adjacent precast concrete slabs 140 are connected are connected and fixed (S10). In more detail, an angle 128 having a long hole 128a formed at a position corresponding to the fastening hole 123a of the track pad fixing plate 122 fixed adjacently is mounted on the adjacent track pad fixing plate 122, and , The second anchor mechanism 129 is coupled to the concrete roadbed 10 through a long hole 128a, a fastening hole 123a, and a fastening hole 113, so that the track pad fixing plate 122 and the angle 128 are connected to the concrete roadbed ( 10).

It goes without saying that the process of S9 and the process of S10 can be performed in advance before the process of S6, if necessary.

With the above process, four 5m-long precast concrete slabs 140 with rails (R) installed within 4 hours, which is the train operation blocking time, can be sufficiently installed, and trains can be operated on the newly installed rails (R). . That is, according to the present invention, it is possible to perform a rapid improvement work in which the gravel track 30 and 20m are quickly replaced with the concrete track 200 within 4 hours, which is the train operation blocking time.

At the end of the day's work, the first vehicle 210, which was equipped with the necessary equipment, precast concrete slab 140, and rail (R), and the removed rail (R), sleeper (S), gravel (B) The second vehicle 240 carrying the back returns to the vehicle base along the gravel track 30 or the concrete track 200 and prepares for the next day's work.

After installing several precast concrete slabs 140 in the process of S1 to S12, after removing the short rails (R) installed on each precast concrete slab (140), the plurality of rails (R) are removed. The pole rail is installed on the precast concrete slab 140 of (S11) and the end is connected to the previously installed rail (R) by welding (S12).

When the track pad 110 is to be replaced with the concrete track 200 installed in the above process, the nut 126b of the first anchor mechanism 126 is loosened to remove the track pad fixing plate 122 and then free. The track pad 110 under the cast concrete slab 140 is removed from the outside and a new track pad 110 is pushed under the precast concrete slab 140 to install.

In the portion where the angle 128 fixed to connect the two adjacent track pad fixing plates 122 and the two track pads 110 through the second anchor mechanism 129 is installed, the nut 126b of the first anchor mechanism 126 ) And the nut (129b) of the second anchor mechanism (129), the angle (128) and the track pad fixing plate (122) are removed, and the fastening hole (113) is opened by pushing the track pad (110) inward. The track pad 110 is rotated sideways while leaving the anchor bolt 129a of the second anchor mechanism 129 through, and then pulled out of the precast concrete slab 140. Installing the new track pad 110 is a process opposite to that of removing the track pad 110 by pushing it under the precast concrete slab 140 and installing it. That is, according to the present invention, it is possible to replace the track pad 110 of the connection portion without removing the anchor bolt 129a of the second anchor mechanism 129.

In the above preferred embodiment, the present invention has been described by taking the replacement of the gravel track 30 with the concrete track 200, but the concrete slab support device 100 according to the present invention and the railroad laying device 102 using the same It goes without saying that the concrete track construction method can also be used to install a new concrete track.

14 is an exploded perspective view showing another example of a shearing force supporting mechanism, and FIG. 15 is a perspective view showing a state in which the pressing mechanism is coupled to the column bracket.

As shown, the shear force support mechanism 150 of this embodiment is also configured with a column bracket 151 and a third anchor mechanism 153, a shear force support block 155 and a pressing mechanism 157. The third anchor mechanism 153 and the shear force support block 155 are the same as in the previous embodiment.

On the other hand, the pillar bracket 151 of this embodiment protrudes upward from the base plate 151a and the base plate 151a, and a pair of slots SL is formed in a portion facing the upper end, and a pair of slots SL ) Is installed across the pillar (151c) and is configured with a pillar (151c) in which the cross-fixing portion (158) in which the fastening hole (158a) is formed is fixed.

The pressing mechanism 157 is for pressing the shear force supporting block 155 downward, and includes a bolt 157b coupled to the fastening hole 158a, a pressing plate 157c, a pressing bar 157d and a cover 157f It is composed by

The pressing plate 157c is coupled to the outer circumferential surface of the pillar 151c and mounted on the shear force supporting block 155. The pressure plate 157c is preferably in a ring shape, but may be modified into other shapes as necessary.

The pressure bar (157d) has a through hole (157e) through which the bolt (157b) can pass, is inserted into a pair of slots (SL), and both ends protrude outside the column (151c), respectively, to be mounted on the pressure plate (157c). do.

Preferably, the circular cover 157f is inserted into the pillar 151c with a through hole 157g through which the bolt 157b passes. However, it is not necessary to have this circular cover 157f.

The bolt 157b is coupled to the fastening hole 158a through the through holes 157e and 157g to press the cover 157f, the pressing bar 157d, and the pressing plate 157c downward. The cover 157f is installed between the pressure bar 157d and the head of the bolt 157b to prevent foreign substances from flowing into the pillar 151c.

The bolts 157b and the through holes 157e and 157f are preferably provided in two, and may be increased or decreased as necessary.

The rest are the same as described earlier.

The present invention is likely to be suitably used for rapid improvement of a gravel track to a concrete track. In addition, the present invention can be used not only to replace old concrete tracks, but also to construct new concrete tracks.

100: concrete slab support device 102: railway laying device
110: track pad 111: bottom plate
112: fixing part 113: fastening hole
114: load 115: groove
116: reinforcing plate inserted elastic body 118: reinforcing plate
119: rubber layer 120: fixing mechanism
122: track pad fixing plate 123: cover portion
123a: fastening hole 124: bolted plate portion
124a: bolt hole 126: first anchor mechanism
128: angle 128a: long hole
129: second anchor mechanism 130: simple rate
132: protrusion 132c: edge incision plate
140: precast concrete track 142: hole
150: shear force support mechanism 151: column bracket
151b: threaded portion 151c: column
153: third anchor mechanism 155: shear force support block
155a: shear force support rubber 155b: insert plate
155c: upper plate 155d: release mechanism coupling portion
157: pressurization mechanism 157a: groove
157b: bolt 157c: platen
157: pressure bar 157f: cover
158: Crossing fixation

Claims (22)

In the concrete slab support device for supporting the precast concrete slab on which the rail is installed on a concrete roadbed,
A plurality of track pads disposed at intervals on the concrete roadbed to elastically support the precast concrete slab by separating it upward from the concrete roadbed; And
And a fixing mechanism for fixing a plurality of the track pads to the concrete roadbed,
The track pad,
A floor plate having a fixing part having a fastening hole for fixing to the concrete roadbed using the fixing mechanism and a load part receiving a load transmitted from the precast concrete slab; And
It includes a reinforcing plate inserting elastic body installed in the load part and configured with a plurality of reinforcing plates inserted in a layered form at an interval between the rubber and the rubber inside the rubber,
Concrete slab support device, characterized in that the surface of the bottom plate is surrounded by rubber integrally connected to the rubber. delete The concrete slab support device of claim 1, wherein one side of the fastening hole is opened laterally. The method of claim 1, comprising a simple rate mounted on the reinforcing plate inserting elastic body so as to adjust a height supporting the precast concrete slab,
At the edges of both sides facing at least the side of the simplate, a first incision cut parallel to the side and a second incision cut outward between both ends of the first incision and the edge cutout plate in which both sides are cut downward. Concrete slab support device, characterized in that it has a protrusion formed by bending. In claim 1, wherein the fixing mechanism,
Having a fastening hole formed at a position corresponding to the fastening hole, and having a cover portion covering the upper surface and both side portions of the fixing portion, and a bolt coupling plate portion connected to the lower end of both sides of the cover portion and extending outwardly and having a bolt hole. Track pad fixing plate;
A concrete slab support device comprising a first anchor mechanism that is coupled to the concrete roadbed through the bolt hole to fix the track pad fixing plate to the concrete roadbed. In claim 5, wherein the fixing mechanism,
An angle having a long hole formed at a position corresponding to the fastening hole of the track pad fixing plate that is fixed adjacently; And
The concrete slab support device, characterized in that it further comprises a second anchor mechanism fixed to the concrete roadbed through the long hole, the fastening hole and the fastening hole to fix the angle to the concrete roadbed. Precast concrete slab with holes formed up and down;
A shear force support mechanism for preventing the precast concrete slab from moving and rotating laterally and upward by being inserted into the hole and fixed to the concrete roadbed; And
A concrete slab support device according to any one of claims 1 and 3 to 6 is fixed to the concrete roadbed at intervals to elastically support the precast concrete slab by separating it upward from the concrete roadbed. Railway laying device, characterized in that to. In claim 7, wherein the shear force supporting mechanism,
A base plate and a pillar bracket protruding upward from the base plate and having a pillar formed with a threaded portion;
A third anchor mechanism for fixing the base plate to the concrete roadbed;
A shear force support block coupled to the periphery of the pillar and supporting between the pillar and the inner surface of the hole to prevent the precast concrete slab from moving lateral and upward and rotating; And
And a pressing mechanism for pressing the shear force supporting block downward by being coupled to the screw portion. In claim 7, wherein the shear force supporting mechanism,
It includes a base plate and a pillar protruding upward from the base plate, and a pair of slots is formed at a portion facing the top of the pillar, and a pair of slots is installed across the pillar at the bottom of the pair of slots, and a fastening hole is provided. A pillar bracket to which the formed cross-section fixing portion is fixed;
A third anchor mechanism for fixing the base plate to the concrete roadbed;
A shear force support block coupled to the periphery of the pillar and supporting between the pillar and the inner surface of the hole to prevent the precast concrete slab from moving lateral and upward and rotating; And
Railway laying apparatus, characterized in that it comprises a pressing mechanism for pressing the shear force support block downward through a bolt coupled to the fastening hole. In claim 9, wherein the pressing mechanism is inserted into the pair of slots having a pressing plate coupled to the outer circumferential surface of the column and mounted on the shearing force supporting block, and a through hole through which the bolt can pass, and both ends of the column A railroad laying apparatus comprising: a pressure bar protruding outward and mounted on the pressure plate, and the bolt coupled to the fastening hole through the through hole to press the pressure bar and the pressure plate downward. [11] The railway laying apparatus of claim 10, wherein a circular cover is provided between the pressure bar and the head of the bolt through a hole through which the bolt passes and is inserted into the column. The method of claim 9, wherein the hole formed in the precast concrete slab and the shearing force support block are gradually widened from the bottom to the top and are formed in a non-circular cross section,
The shearing force supporting block is a railroad laying apparatus comprising a shearing force supporting rubber and an inserting plate inserted in a layered form at an upper and lower interval in the inside of the shearing force supporting rubber. In claim 8, wherein the shear force support block is formed with a release mechanism coupling portion,
The pressing mechanism is a railway laying device, characterized in that the ring nut. [10] The railway laying apparatus of claim 9, wherein the shear force supporting block is divided into two. A track pad arranging step of arranging a plurality of track pads for elastically supporting the precast concrete slab upwardly from the concrete roadbed at intervals on the concrete roadbed in the longitudinal direction of the railway;
A precast concrete slab mounting step of mounting the precast concrete slab having holes formed up and down and having a pair of rails installed in parallel on the plurality of track pads; And
Installing a shearing force support mechanism to prevent the precast concrete slab from moving and rotating laterally and upward by installing a shear force support mechanism on the concrete roadbed through the hole;
A track pad fixing step of fixing the track pad to the concrete roadbed using a fixing mechanism,
The step of arranging the track pad,
A floor plate having a fixing part having a fastening hole and a load part receiving the load transmitted from the precast concrete slab, and a plurality of reinforcements installed in the load part and inserted into a layer at a vertical interval between the rubber and the rubber A concrete track construction method comprising disposing the track pad comprising a reinforcing plate inserting elastic body configured with a plate. The method of claim 15, wherein before the precast concrete slab mounting step, on the reinforcing plate inserting elastic body, at least at both edges facing each other, a first incision cut in parallel with a corresponding side and an outward cut between both ends of the first incision It characterized in that it comprises a height adjustment step of adjusting the height and inclination for supporting the precast concrete slab by installing a simple rate having a protrusion formed by bending the edge incision plate in both sides by the second incision is bent downward. Concrete track construction method. The method of claim 15, wherein the fixing of the track pad comprises:
It has a fastening hole formed at a position corresponding to the fastening hole formed in the fixing part, and is connected to the lower end of both sides of the cover part and the cover part covering the upper surface and both side parts of the fixing part, extending outward and having a bolt hole And fixing the track pad fixing plate to the concrete roadbed by coupling a first anchor mechanism to the concrete roadbed through the bolt hole in a state in which a track pad fixing plate having a bolt coupling plate portion is coupled to the fixing portion. Concrete track construction method. The method of claim 17, wherein the fixing of the track pad comprises:
An angle mounting step of mounting an angle having a long hole formed at a position corresponding to the fastening hole of the adjacently fixed track pad fixing plate on the adjacent track pad fixing plate; And
Concrete track construction, characterized in that it comprises an angle fixing step of fixing the track pad fixing plate and the angle to the concrete roadbed by coupling a second anchor mechanism to the concrete roadbed through the long hole, the fastening hole, and the fastening hole. Way. In claim 15, wherein the shearing force support mechanism installation step,
An anchor bolt fixing step of fixing the anchor bolt of the third anchor mechanism to the concrete roadbed;
Fixing a pillar bracket that protrudes upward from the base plate and the pillar bracket having a pillar formed with a threaded portion from the lower side to the upper side, and is coupled to and fixed to the anchor bolt through the hole formed in a non-circular cross section step;
A shear force support block that combines a shear force support block formed in a non-circular cross section between the pillar and the inner surface of the hole so as to prevent the precast concrete slab from moving and rotating from the bottom to the top Combining step; And
And a shearing force supporting block pressing step of pressing the shearing force supporting block downward by coupling a pressing mechanism to the threaded portion. In claim 15, wherein the shearing force support mechanism installation step,
An anchor bolt fixing step of fixing the anchor bolt of the third anchor mechanism to the concrete roadbed;
It includes a base plate and a pillar protruding upward from the base plate, and a pair of slots is formed at a portion facing the top of the pillar, and a pair of slots is installed across the pillar at the bottom of the pair of slots, and a fastening hole is provided. A post bracket fixing step of fixing the post bracket to which the formed transverse fixing part is fixed to the anchor bolt through the hole formed in a non-circular cross section and gradually wider from the bottom to the top;
A shear force support block that combines a shear force support block formed in a non-circular cross section between the pillar and the inner surface of the hole so as to prevent the precast concrete slab from moving and rotating from the bottom to the top Combining step; And
And a shearing force supporting block pressing step of pressing the shearing force supporting block downward by coupling a pressing mechanism to the fastening hole formed in the cross section. The method of any one of claims 15 to 20, wherein the gravel track is rapidly replaced with a concrete track, including a gravel track removing step of removing rails, sleepers and gravel in a certain section on the gravel track before the track pad arrangement step. Concrete track construction method, characterized in that to enable. The method of claim 21, further comprising a rail removing step of removing the rails respectively installed on the plurality of precast concrete slabs, and a long rail installation step of installing a pole rail on the plurality of precast concrete slabs from which the rails have been removed. Concrete track construction method, characterized in that.

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