KR20060124101A - Precast slab track system and it's construction method - Google Patents

Abstract

A precast slab track system and a construction method thereof are provided to secure the best quality through quality control for materials and manufacture in a factory, to minimize the crack width in a construction site and to reduce construction, maintenance and life cycle costs by reconstructing and repairing easily. A precast slab track system(PSTS) comprises: a foundation layer(100) for stabilization formed in the appointed thickness and width using concrete and provided with inclines; a slab frame(200) composed of an opening penetrated vertically, many fasteners projected to the right and left sides of the opening, a reinforcement unit of many vertical reinforcing bars and many horizontal reinforcing bars, and a drain groove retreated inward in the appointed size; filler(300) made of asphalt emulsion, cement, sand and additives and injected between the foundation layer and the slab frame through injection holes; a pair of long rails(400) installed on the fasteners of the slab frame at regular intervals; and a rail coupler(500) fixing the rails on the fasteners of the slab frame. A construction method for the precast slab track system comprises the steps of manufacturing a slab frame formed in the rectangular shape and provided with an opening and many fasteners, carrying the manufactured slab frame on a job site using a conveyor, forming a foundation layer for stabilization to have the appointed thickness and width by placing concrete, installing the slab frame on the foundation layer, placing filler between the foundation layer and the slab frame, installing rails on the slab frame at regular intervals and fixing the rails on fasteners of the slab frame using a rail fastener.

Description

Precast slab track system and it's construction method

1 is a perspective view of a precast slab track system in accordance with the present invention;

2 is a front perspective view showing a slab frame of the precast slab track system according to the present invention;

3 is a bottom perspective view illustrating a slab frame of the precast slab track system according to the present invention;

4 is a perspective view showing a state in which reinforcing bars in the slab frame according to the invention

5 is a perspective view illustrating a state in which a filler is filled in a precast slab track system according to the present invention;

6 is a plan view showing a connection state by a first connection method when connecting between slab frames according to the present invention;

7 is a plan view showing a connection step 1 state by a first connection method between the slab frame according to the present invention,

8 is a plan view illustrating a two-stage connection state by a first connection method between slab frames according to the present invention;

9 is a plan view showing a three-stage connection state by the first connection method between the slab frame according to the present invention,

10 is a plan view illustrating a connection state by a second connection method between slab frames according to the present invention;

11 is a plan view showing an insulating state between the longitudinal and transverse reinforcement embedded in the slab frame according to the present invention,

12 is a plan view illustrating a construction procedure of the first and second connection methods between the slab frame according to the present invention.

Figure 13 is a side view showing the construction procedure of the first, second connection method between the slab frame according to the present invention 1,

14 is a plan view illustrating a construction procedure of the first and second connection methods between the slab frames according to the present invention;

Figure 15 is a side view showing the construction procedure of the first, second connection method between the slab frame according to the present invention.

16 is an exemplary view showing a state of injecting between the stabilization base layer and the slab frame according to the present invention as a filler.

Explanation of symbols on the main parts of the drawing

100: stabilization base layer 200: slab frame

210: opening 220: fastener

230: reinforcing bar 232: longitudinal rebar

234: transverse rebar 240: drain groove

250: joint 252: concave groove

254: protrusion 260: crack inducing joint

270: PVC pipe 280: Perforated pipe

290: steel bar 300: filling material

310: inlet 400: rail

500: rail fastener 600: screw jack

PSTS: Precast Slab Track System

The present invention relates to a precast slab track system and construction method, and in particular, to a precast slab track system and construction method suitable for field conditions in consideration of the characteristics of the slab track components for high-speed railway and the ground characteristics of Korea.

Although most of the current tracks are in the form of traditional trajectories, the recent trend is gradually increasing the laying of slab tracks.

The advantage of slab track is to improve the durability of track by increasing buckling resistance due to the increase of track strength and to minimize dropout due to load.

Therefore, the linear maintenance and maintenance work cycle of the track is lengthened, and maintenance costs can be saved by reducing track maintenance costs.

In addition, due to the low construction surface and low width of the track structure, it satisfies the rapid curvature of the narrow curvature and the laying on the maximum narrow site, while compensating the rigidity of the track structure, thereby reducing the construction cost by inducing the reduction of the cross section of the tunnel and the bridge deck. Can be.

Therefore, it is an orbital structure having absolute strengths in sections in which a large amount of maintenance is expected due to an increase in the number of train operations, tunnels and long bridge sections, and eddy current braking sections.

Due to these reasons, they showed great interest in Japan, Germany, Italy, etc., which have high operating experience in high-speed railway, and developed and put them into practical use. Recently, due to the development of concrete construction technology and construction equipment, the required construction cost has been lowered, resulting in economic efficiency.

Until now, most of the slab tracks have been laid on the subway and some test tracks, but since the 1960s, they have been gradually applied to high speed ships.

Among them, 3-4 systems have proven their usefulness at high speeds over 200km / h.

France, operated by TGV at an operating speed of 300 km / h, is mostly made of gravel orbits, but in Germany, Japan, and Italy, where the ratio of civil structures such as bridges, tunnels, and culverts is high because of the mountainous terrain, Very active in laying tracks.

At present, German slab tracks and Japanese slab tracks are the most laid, and the durability, driving stability and economic feasibility at high speed have been verified.

Typical high-speed rail slab tracks include Japan's anti-vibration A-type slab tracks, German redda tracks, and Jublin tracks.

In Japan, the slab track has the largest number of laid tracks (2,700km).

The slab orbit, which was only 5% on the first Shinkansen, Sanyo, accounts for 93% of the entire line on the Tohoku.

Most of the new Shinkansen completed recently (concrete slab track 255km, gravel trajectory 15km, 89% of the ratio) have been constructed as concrete slab tracks.

Recently, the operating speed is estimated at 275km / h and can operate at speeds of 300km / h without modification of the track structure.

In the case of Germany, the development and application of subsequent slab tracks was poor after the first slab track was laid at Rheda station in Germany in 1972.

However, after the merger of DB-West and DB-East in Germany on January 1, 1994, it transformed into DB-AG, there are almost no restrictions on the use of railroads. As the basic principle.

Later, in 1997, the first large-scale harnessing track was built on the Hanover-Berlin high-speed railway.

Here, concrete concrete tracks (extended distance: 140 km) and asphalt vitalized tracks (extended: 5 km) were used.

The high-speed new Cologne, which is about 200 km long, is currently under construction, almost all of which consist of continuous vitalized tracks.

Technological advances have been made based on the experience gained through the construction of many of these test intervals.

In the meantime, the slab tracks were laid on various structures such as torn roads, tunnels, bridges, and history. It has been successful.

On the other hand, the cast-in-place slab track is aiming at structural simplification from three design elements to one design element in an effort to make a more economic track structure away from the expensive method.

That is, (a) starting from a buried process with three design elements (BTS layer / ATS layer, sleeper, filling material such as filled concrete or mastic asphalt), and (b) two design elements (BTS layer / ATS). Layers, sleepers) A non-invasive process (concrete-free placing track) is being attempted to (c) a sleeper process with one design element made of a single piece (integrated rail points into the BTS layer).

In addition to avoiding the simplicity of such design elements, slab tracks require different technical characteristics than other tracks, and it is important to combine different characteristics of these systems to form a harmonized system.

That is, rail pads, fasteners, and the like require different conditions from the general image orbit. Type 3 tracks have concrete spheres (troughs).

The function of the trough is to distribute the increased dynamic loads due to the high-speed railway trains to the impermeable layer or the concrete base through a grid structure consisting of rails, rods and single sleepers. .

In addition, it provides a solid support for transmitting the horizontal force generated from the temperature change of the pole rail as a feature that is installed by combining the pole rail during construction.

If there is a sphere, the rod penetrates the sleeper to create a lattice structure, and the in-field casting track, which omits the sphere, places rebar on the underside of the sleeper to resist bending by the shaft.

Concrete slab tracks are the most established in the high-speed railway lines of Germany and are well received for their linear maintenance.

However, in comparison with the non-spherical type, the increase of the cross section causes the cost of construction, and if it is not perfect, there is a possibility of cracking due to the inhomogeneous concrete filling of the lower part of the sleeper.

If this sphere is omitted, the most structural improvement is the efficient placement of rebar in the BTS (concrete support) layer.

In concrete struc- tures, longitudinal reinforcements are to be designed to allow seamless continuous concrete layers.

In other words, in order to minimize the top crack for concrete hardening and temperature load, the rebar ratio of 0.8 ~ 0.9% should be satisfied based on the cross section of BTS layer.

This is to prevent cracking under the influence of temperature and is based on ACI 318 regulations.

This makes it possible to limit the crack width of the top surface of the BTS layer to less than 0.5 mm.

In general, in the case of the German cast-in-place slab, the quality standard of the BTS layer is that the surface profile tolerance must be 2mm and meet the concrete quality grade B35 (more than 40N / mm2 concrete 28 days nominal strength).

One of the technical characteristics to consider is the linear adjustment method during construction.

This is because the vertical track trajectory, ride comfort, and auxiliary equipment are determined by this method.

In the case of slab tracks, once the construction is done, there is no loss of the position of the orbital head surface, but the linear construction method becomes important in construction because wrong construction error is maintained and correction is almost impossible later.

Looking at the technical trend of the linear adjustment method of the foreign slab track can be classified into three methods as follows.

(1) Spindle built into sleepers

This method involves placing the sleeper on the trough by placing the spindle vertically and horizontally in the sleeper and adjusting it to within 2mm per 5m by optical measurement and then filling it with filled concrete.

Spindle installation costs increased because one set of vertical spindles was installed per two sleepers, but the German Q-number evaluation showed a good performance of 10-15.

(2) Automated sleeper mounting with optical equipment

This method is a method of attaching the stationary reference to the left and right sides of the sleeper mounting beam to guide the sleeper frame into the fresh concrete of the BTS layer by precise adjustment.

A stationary reference is placed on the concrete liquefaction layer that caused the sleepers to vibrate to place the sleepers in the correct place.

At this time, a camera and a laser measuring device are required for each sleeper installation cycle, and a photo task calculator and a control monitor are installed in the main body of the machine.

An automated, special vibrator and sleeper guidance program should be developed to select sleeper locations.

(3) Method by adjusting frame

The control method was first used in the Berlin orbit, a modified version of the previous LEDA orbit.

It is a method of adjusting the linearity by supporting the adjusting frame with three left and right spindle screws on the trough with the rail as the reference point.

Such a method is laid while the pole rail is fastened.

It has a quasi top-down method that fits on the bottom of the rail rather than the head, but it is relatively easy to use.

This method supports the adjusting frame on the HGT layer (impermeable layer) or the concrete layer inside the tunnel, and adjusts linearity based on the track surface by placing vertical and horizontal adjusting screws inside the adjusting frame.

This method eliminates the spindle on the sleepers and adjusts only by the adjustment frame, which has the advantage of simplifying the slab trajectory.

If the adjustment frame is modified to a full top-down form, the construction error generating part is reduced.

One of the methods for quantitatively evaluating the determined track linearity is a ride-sensing index (Q-number) that records the position of tracks in order using track detection vehicles.

In order to know the stable condition of the track structure, it is measured up to 6 times a year considering the track distortion, gap difference and direction (curvature).

A smaller ride comfort index means no maintenance is required, and a larger ride comfort index means that the ride comfort and track condition worsens, and thus the index reflects a change in track position due to train loading.

The gravel-shaped structure in the high-speed railway section shows the wear phenomenon when the track position is not very good.

According to the German comfort analysis data, when the gravel road shows 80-100, the index of slab track is very small, within 5-35.

In the case of a spherical track that fits linearly from the head of the track, the ride comfort index of the section is 10 to 15. The non-buried method was also excellent in 20-25.

In the above, the development trend of the high-speed railway slab track and the main technical requirements were explained.

In Japan, slabs are being considered for continued Shinkansen.

In Europe, Germany has recently focused on the development of slab tracks as a countermeasure against the increase in repairs due to high speeds.

In particular, the development of slab tracks is being developed with the intention of speeding up the future to improve the transportation network between the East and West Germany.

Currently, about 20 companies have been patented for the vitalization track including slab tracks, and about 30 tracks are being proposed, and fierce competition for development is in progress.

Here, Korea applied slab tracks in some long tunnel sections of the Gyeongbu high speed railroad (Seoul to Daegu), and the second phase of the Gyeongbu high speed railroad (between Daegu and Busan) is currently designing all sections as slab tracks.

However, Korea's high-speed railway vehicles and systems are currently introducing and operating the French TGV system. In France, all sections of the high-speed railway consist of gravel roads.

However, when the slab track is introduced into the French system, a problem arises between the reinforcing bar and the signal system, which are essential elements of the slab track.

The UM71, a French signaling system introduced in Korea, is an electrical circuit that automatically detects the presence of trains in track circuit sections.It is a fundamental safety component of automatic train control.It uses rails as information transmission media for train detection and ground equipment. It transmits signal information to trains in operation, detects rail breakage, and returns the tramline currents to substations.

However, the reinforcing bar installed within 690 mm from the rail top has a problem of causing interference by the track circuit transmission voltage and causing performance degradation of the signal system.

Accordingly, the present invention has been made to solve the problems described above, the main purpose is to develop a unique slab track suitable for the domestic situation, can be applied to high-speed railway and general railway, construction properties in consideration of site conditions The purpose is to provide improved and economical in terms of life cycle cost, to provide a high quality of the system as well as easy to maintain precast slab track system and construction method.

Precast slab track system according to the present invention for achieving the above object is a stabilizing base layer having a predetermined thickness and width of the concrete, a constant slope on the left and right sides; A slab frame installed on an upper surface of the stabilization base layer and formed of a rectangular plate body as a whole, wherein a rectangular opening is formed in the center thereof, and a plurality of fasteners protrude integrally to the left and right sides of the opening; A filler which is filled between the stabilization base layer and the slab frame and connects them integrally; A rail fixedly installed on the fastener of the slab frame and having a predetermined length in parallel with a pair; Characterized in that the rail is configured to fasten the rail on the fastener of the slab frame.

In addition, the precast slab track construction method according to the present invention for achieving the above object is made of a rectangular plate-like body as a whole in the factory, a rectangular opening is formed therein, a plurality of fasteners to the left and right sides of the opening Manufacturing an integrally formed slab frame (I); Transferring the slab frame to a position where the manufactured slab frame is to be installed using a separate conveying device (II); Forming a stabilization base layer by placing concrete to have a constant thickness and width from the ground and having a constant inclined surface on left and right sides (III); Installing a slab frame on the stabilization base layer (IV); (V) filling a filler between the stabilization base layer and the slab frame; (VI) installing rails having a predetermined length in parallel with each other at a predetermined interval on the slab frame; The rail is fastened to the fasteners of the slab frame characterized in that it consists of a step (Ⅶ).

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

1 is a perspective view showing a precast slab track system according to the present invention, Figures 2 and 3 are a front, bottom perspective view showing a slab frame of the precast slab track system according to the present invention, Figure 4 is a present invention 5 is a perspective view illustrating a state in which reinforcing bars are reinforced in a slab frame according to the present invention, and FIG. 5 is a perspective view illustrating a state in which a filler is filled in a precast slab track system according to the present invention, and FIG. 6 is between slab frames according to the present invention. 7 and 9 are plan views illustrating a connection stage 1 state between the slab frames according to the present invention, and FIGS. 10 and 11 are longitudinal and transverse directions embedded in the slab frame according to the present invention. 12 and 13 are plan views showing the construction procedure of the first and second connection methods between the slab frames according to the present invention. 1 and side views 1, 14 and 15 are a plan view 2 and a side view 2 showing the construction procedure of the first and second connection method between the slab frame according to the present invention, Figure 16 is a stabilization base layer according to the present invention and It is an exemplary figure which shows the state which injects between slab frames with a filler.

As shown in these figures, the precast slab track system (PSTS) according to the present invention comprises a stabilization base layer 100 having a constant thickness and width of concrete and a constant inclined surface on the left and right sides; It is installed on the upper surface of the stabilization base layer 100 at the same time made of a generally rectangular plate body, a rectangular opening 210 is formed in the middle, a plurality of fasteners 220 to the left and right sides of the opening 210 A slab frame 200 which protrudes integrally; A filler 300 which is filled between the stabilization base layer 100 and the slab frame 200 and connects them integrally; A rail 400 fixedly installed on the fastener 220 of the slab frame 200 at a predetermined interval and having a predetermined length in parallel with each other; It consists of a rail fastener 500 for fixing the rail 400 on the fastener 220 of the slab frame 200.

That is, in the precast slab track system (PSTS) according to the present invention, the stabilization base layer 100, the slab frame 200, the filler 300, the rail 400 and the rail fastener 500 is organically coupled Structure.

Here, the stabilization base layer 100 is a structural part having a predetermined thickness and width of the concrete, a constant inclined surface on the left and right sides.

In addition, the slab frame 200 is made of a rectangular pre-cast concrete plate as a whole, the opening 210 through which the upper and lower surfaces penetrate the rectangular in the center of the rectangular plate; Fasteners 220 formed to integrally protrude from the left and right sides of the opening 210; A rebar portion 230 formed by crossing a plurality of longitudinal rebars 232 and a plurality of transverse rebars 234 on an inner surface of the rectangular plate-shaped body; It is composed of a drain groove 240 formed concave inward in a predetermined size on the bottom surface of the rectangular plate-like body.

The reason why the opening 210 is formed in the slab frame 200 is to provide economical construction while having structural strength.

In addition, the slab frame 200 is exposed to a plurality of longitudinal reinforcing bars 232 of a predetermined length to smoothly connect between the slab frame 200 and the slab frame 200 on the side and at the same time inward to a certain depth Concave groove 252 is formed with a joint 250 is formed.

On the other hand, the reinforcing bar 230 is placed in the slab frame 200 is made of the longitudinal reinforcing bars 232 and the transverse reinforcing bars 234 are crossed, the longitudinal, transverse reinforcing bars 232, 234 of each intersection PVC pipe 270 is fitted to the outer peripheral surface of the), by the PVC pipe 270 is insulated between the longitudinal, transverse reinforcing bars (232, 234).

That is, the contact portion of the longitudinal reinforcing bars 232 and the transverse reinforcing bars 234 is insulated using the PVC pipe 270, which is an insulating material, for electrical insulation, and the transverse reinforcing bars 234 affecting material reduction and electrical insulation. It is the structure that installed minimum.

In addition, a plurality of crack inducing joints 260 having a constant depth and width are formed between the fasteners 220 so that crack generation of the slab frame 200 is optimally formed in the axial direction from the surface of the slab frame 200. Structure.

In addition, the steel bar 290 is a structure cut from the center portion of the slab frame 200 so as not to affect the slab frame 200 in order to electrically insulate each slab frame (200).

And it is preferable to adjust the length so that the steel bar 290 located in the opening 210 of the slab frame 200 is located in the end of the slab frame 200.

The slab frame 200 as described above extends in the longitudinal direction of the rectangular plate body made of reinforced concrete, and has at least two steel bars 290 protruding above the rectangular plate body surface on the front side, and the steel bar 290 At least one theoretical break point extending laterally with respect to the cross-section), and the steel bar 290 is insulated from the center of the plate body to insulate the plate longitudinal and transverse reinforcing bars 232 and 234. Insulating the contact portion of the reinforcing bar 232 and the transverse rebar 234, the opening 210 is formed in the central portion of the plate to minimize the transverse rebar (234).

In addition, the filler 300 is injected between the stabilization base layer 100 and the slab frame 200, but is made of asphalt emulsion, cement, sand, additives as a main component, because it must fill a wide void, fluidity should be good, compression The strength should be 7 ~ 15MPa, not dry shrinkage, and high resistance to freeze-thawing.

In addition, in order to prevent the filler 300 from flowing down when the filler is injected, a separate special formwork is installed in the slab frame 200, and a plurality of additional injection holes 310 are installed to inject the filler into the formwork. .

And the rail 400 is a high-speed railway pole rail 400 is fixedly installed with a certain length side by side at a predetermined interval on the fastener 220 of the slab frame 200.

In addition, the rail fastener 500 is a device for fixing the rail 400 on the fastener 220 of the slab frame 200.

The construction of the precast slab track according to the present invention having the configuration as described above will be described.

Precast slab track construction method according to the invention is made of a rectangular plate body as a whole in the factory, a rectangular opening 210 is formed in the middle, a plurality of fasteners 220 to the left and right sides of the opening 210 Manufacturing an integrally formed slab frame 200 (I);

Transferring the slab frame 200 to a position where the manufactured slab frame 200 is to be installed by using a separate conveying device (II);

(III) forming a stabilization base layer 100 by pouring concrete to have a constant thickness and width from the ground and to have a constant inclined surface on the left and right sides;

Installing a slab frame (200) on the stabilization base layer (100);

Filling (V) the filler 300 between the stabilization base layer 100 and the slab frame 200;

Installing (VI) a rail having a predetermined length in parallel with each other at a predetermined interval on the slab frame (200); The rail 400 is fastened to the fasteners 220 of the slab frame 200 by the rail fasteners 500 to sequentially perform a precast slab track (PSTS).

Here, the slab frame 200 is made of a rectangular precast concrete plate as a whole, the opening 210 through which the top and bottom through the rectangular shape in the center of the rectangular plate body; Fasteners 220 formed to integrally protrude from the left and right sides of the opening 210; A rebar portion 230 formed by crossing a plurality of longitudinal rebars 232 and a plurality of transverse rebars 234 on an inner surface of the rectangular plate-shaped body; A drain groove 240 formed concave inwardly with a predetermined size on the bottom surface of the rectangular plate-shaped body; In order to connect the slab frame 200 and the slab frame 200 on the side thereof, a plurality of longitudinal reinforcing bars 232 of constant length are exposed and a concave groove 252 formed with a concave groove 252 inward at a constant depth. )Wow; It consists of a crack-induced joint 260 is formed a plurality of so as to have a constant depth and width from the surface of the rectangular plate-like body.

That is, in the manufacture of the slab frame 200 as described above, first install the formwork corresponding to the slab frame 200, reinforcing the reinforcing steel in the formwork, injecting the prestress, and after pouring concrete, the vibration compacting On the other hand, it is prepared by demolding the formwork after curing.

Here, the reinforcing bar 230 is provided with rebars 232 and 234 vertically and horizontally, by inserting the PVC pipe 270 on the outer circumferential surface of the longitudinal reinforcing bars 232 and the transverse reinforcing bars 234 corresponding to the intersections thereof. Insulate.

In addition, the slab frame 200 is a prestressed product is stacked using a separate special equipment when the slab frame 200 is placed during the curing period in order to prevent product quality and deformation.

In addition, the slab frame 200 manufactured in the factory is transported using a transport vehicle equipped with a separate special equipment so that the slab frame 200 is not deformed by the impact during transportation.

In addition, after the slab frame 200 has a predetermined thickness and width from the ground on which the slab frame 200 is to be installed, and the concrete is placed on the left and right sides to form a stabilization base layer 100, the slab on the stabilization base layer 100 is formed. The frame 200 is installed.

At this time, the slab frame 200 is installed by connecting them as units consisting of a predetermined length and width.

Here, the connection between the slab frame 200 is roughly divided into two types depending on the connection method.

The first connection method of the slab frame 200 is to embed the at least one hole tube 280 of a predetermined length through the end of the slab frame 200, to manufacture the slab frame 200, and the hole pipe ( 280 is fixed to the steel bar 290 to connect between the adjacent slab frame 200.

In addition, the slab frame 200 by inserting at least one or more perforated pipe 280 inside the slab frame 200, and inserts a steel bar 290 or a stranded wire into the perforated pipe 280, the slab frame 200 Inject the filler 300 to a certain height in the lower portion, and after curing, the pre-stress is injected into the steel rod 290 or the stranded wire, while filling the filler 300 in the perforated pipe 280 and the joint portion 250 ), And connect to each other by pouring non-shrink grouting.

In addition, the second connecting method of the slab frame 200 is connected to the four longitudinal reinforcing bars 232 through each of the slab frame 200 to connect between the slab frame 200 and the slab frame 200, The two short longitudinal bars 232 positioned in the opening 210 connect to each other.

Here, the electrical insulation between the slab frame 200 is insulated at the center of the slab frame 200 to break the four longitudinal reinforcing bars 232 through the slab frame 200 for each slab frame 200, Two longitudinal reinforcing bars 232 located in the opening 210 are shortly installed.

That is, the connection between the slab frame 200 is a method of connecting a total of six longitudinal reinforcing bars (232) through the slab frame 200 and a total of two short longitudinal reinforcing bars (232) located in the opening 210 to each other bar,

At this time, in order to break the four longitudinal reinforcing bars 232 through the slab frame 200 for each slab frame 200 for electrical insulation, the insulating treatment at the center of the slab frame 200 and the longitudinal position located in the opening 210 Short installation of two direction reinforcing bars (232).

On the other hand, the slab frame 200 to be connected by the first and second connection methods as described above are all installed through the following process.

That is, when the slab frame 200 is connected between the pour the filler 300 under each slab frame 200, and after the filler 300 is cured, the screw jack (2) at both ends of the connecting portion of the slab frame 200 ( 600 is installed, and longitudinal reinforcing bars 232 of each slab frame 200 are connected to each other, thereby connecting the slab frame 200 on one side and the slab frame 200 on the other side.

In addition, when the slab frame 200 is connected between the slab frame 200 to manufacture a plurality of slab frame 200 with a protrusion 254 is formed outside when manufacturing each slab frame 200, the manufactured slab frame 200 to a predetermined position After placing at appropriate intervals, the filler 300 is poured under the slab frame 200, and after the poured filler 300 is cured, the longitudinal reinforcing bars 232 between the slab frames 200 are placed. Interconnect.

Therefore, by connecting the slab frame 200 in the same manner as described above to fill the filler 300 into the inside of the conventional connecting portion, the process of hardening the filler 300 can be omitted, thereby improving the construction speed There is this.

After connecting between the slab frame 200 by using the method as described above, while filling the filler 300 between the slab frame 200 and the stabilization base layer 100, and stabilized with the slab frame 200 Side surfaces between the base layers 100 are sealed with a constant material, and a filler injection hole 310 and an air hole are formed in the slab frame 200, and then the filler 300 is injected.

Here, the filler 300 is used to directly mix each material in the field and inject between the stabilization base layer 100 and the slab frame 200 at a constant pressure, in which case each material is weighed and blended, and a constant pressure is used. It is constructed using a special equipment that can be injected through the injection hole 310 to the.

In addition, while injecting the filler 300 of a certain height in the lower portion of the slab frame 200, the overall injection into the slab frame 200, when prestress injection into the steel bar 290 or the stranded wire throughout the slab frame 200 Construct so that the stress is distributed evenly.

On the other hand, when the slab frame 200 is aged or cut, the filler 300 of the lower surface of the slab frame 200 is cut, the joint portion 250 of the slab frame 200 is cut, and the hollow pipe 280 inside After removing the steel bar 290 or the stranded wire, install a new slab frame 200 and the steel bar 290 to connect the slab frame 200 replacement.

As described above, the precast slab track system and construction method according to the present invention has the following effects.

First, the present invention has the advantage of ensuring the best quality by quality control for materials and manufacturing in the factory in terms of quality.

Secondly, the present invention has an advantage of minimizing the crack width to 0.2mm compared to the crack width of 0.5mm generated in the field casting.

Third, the present invention has the advantage of easy reconstruction and repair when construction errors, such as direction and level.

Fourth, the present invention has the advantage of reducing the construction cost and maintenance cost of the slab track system.

Fifth, the present invention has an advantage in terms of life cycle cost (life cycle cost) is less maintenance than other tracks.

Sixth, the present invention significantly reduced on-site work by pre-manufacturing in terms of construction, it is possible to shorten the air without being affected by weather (temperature, heavy rain, etc.) except for the filling material, the work amount is up to 700m / day, average 400m / Work is possible, field processes are reduced, construction equipment is also reduced, there is an advantage to provide a more comfortable working environment due to reduced air pollution.

Seventh, the present invention has the advantage that the level can be adjusted even when correction is impossible with the ground fastener.

Eighth, the present invention has the advantage of easy replacement when the slab track system breakage due to serious accidents.

Ninth, the present invention has the advantage that the train operation after about 5 hours due to the rapid curing of the filler after slab frame replacement.

Claims (15)

Stabilization base layer 100 having a constant thickness and width of concrete, and having a constant inclined surface on the left and right sides; It is installed on the upper surface of the stabilization base layer 100 at the same time made of a generally rectangular plate body, a rectangular opening 210 is formed in the middle, a plurality of fasteners 220 to the left and right sides of the opening 210 A slab frame 200 which protrudes integrally; A filler 300 which is filled between the stabilization base layer 100 and the slab frame 200 and connects them integrally; A rail 400 fixedly installed on the fastener 220 of the slab frame 200 at a predetermined interval and having a predetermined length in parallel with each other; Precast slab track system, characterized in that consisting of a rail fastener 500 for fixing the rail 400 on the fastener 220 of the slab frame 200. The method of claim 1, The slab frame 200 is generally made of a rectangular precast concrete plate body, the opening 210 through which the upper and lower surfaces penetrate in the center of the rectangular plate body; Fasteners 220 formed to integrally protrude from the left and right sides of the opening 210; A rebar portion 230 formed by crossing a plurality of longitudinal rebars 232 and a plurality of transverse rebars 234 on an inner surface of the rectangular plate-shaped body; Precast slab track system, characterized in that consisting of drainage grooves 240 formed concave inwardly in a predetermined size on the bottom surface of the rectangular plate-shaped body. The method according to claim 1 or 2, The slab frame 200 has a plurality of perforated pipes 280 of a predetermined length to expose between the slab frame 200 and the slab frame 200 on the side and at the same time the concave groove 252 inward to a certain depth Precast slab track system, characterized in that consisting of the formed joint (250). The method according to claim 1 or 2, Precast slab track system between the fastener 220 is formed with a plurality of crack-induced joint 260 having a predetermined depth and width in the axial direction from the surface of the slab frame 200. The method of claim 2, The reinforcing portion 230 is made of the longitudinal reinforcing bars 232 and the transverse reinforcing bars 234, but the PVC pipe 270 is fitted to the outer peripheral surface of the longitudinal, transverse reinforcing bars (232, 234) of each intersection Precast slab track system, characterized in that. The factory is made of a generally rectangular plate body, a rectangular opening 210 is formed in the center, and a plurality of fasteners 220 to the left and right sides of the opening 210 formed integrally protruded slab frame 200 is manufactured Step (I); Transferring the slab frame 200 to a position where the manufactured slab frame 200 is to be installed by using a separate conveying device (II); (III) forming a stabilization base layer 100 by pouring concrete to have a constant thickness and width from the ground and to have a constant inclined surface on the left and right sides; Installing a slab frame (200) on the stabilization base layer (100); Filling (V) the filler 300 between the stabilization base layer 100 and the slab frame 200; Installing (VI) a rail having a predetermined length in parallel with each other at a predetermined interval on the slab frame (200); Precast slab track construction method comprising the step of fixing the rail 400 to the fastener 220 on the fastener 220 of the slab frame 200. The method of claim 6, In order to connect the slab frame 200 and the slab frame 200 through the end of the at least one slab frame 200 by embedding at least one perforated pipe 280 of a constant length, to manufacture a slab frame 200 Precast slab track construction method characterized in that connecting the adjacent slab frame 200 by fixing the steel bar 290 to the perforated pipe 280 in the field. The method according to claim 6 or 7, In order to connect the slab frame 200 and the slab frame 200, at least one hole tube 280 is inserted into the slab frame 200 to manufacture the slab frame 200, the hole tube 280 Insert the steel rod 290 or the stranded wire, injecting the filling material 300 to a predetermined height in the lower portion of the slab frame 200, and after curing, the prestress is injected into the steel rod 290 or the stranded wire, the hole pipe 280 Prefilled slab track construction method characterized in that the filling the filling material 300 and at the same time by connecting the non-shrink grouting to the joint portion (250). The method according to any one of claims 6 to 8, When the slab frame 200 is replaced, the filler 300 of the lower surface of the slab frame 200 is cut, the joint 250 of the slab frame 200 is cut, and the steel bar 290 inside the perforated pipe 280. Or after removing the strand, the new slab frame 200 and steel bar 290 by installing a precast slab track construction method characterized in that the replacement of the slab frame 200 by connecting. The method of claim 6, Filling filler 300 is injected between the slab frame 200 and the stabilization base layer 100, the side surface between the slab frame 200 and the stabilization base layer 100 is sealed with a constant material, the slab frame ( Precast slab track construction method characterized by injecting the filling material 300 through the injection hole (310). The method of claim 6, In order to connect the slab frame 200 and the slab frame 200, the four longitudinal reinforcing bars 232 passing through each slab frame 200 are connected to each other, and two short bells positioned in the opening 210 are connected. Precast slab track construction method characterized in that the direction reinforcing bars (232) are connected to each other. The method of claim 11, Electrical insulation between the slab frame 200 is insulated from the center portion of the slab frame 200 to break the four longitudinal reinforcing bars 232 through the slab frame 200 for each slab frame 200, the opening ( Precast slab track construction method characterized in that two longitudinal reinforcing bars (232) located in the 210 is installed short. The method according to any one of claims 6 to 12, In order to connect the slab frame 200 and the slab frame 200, the filler 300 is poured under each slab frame 200, and after the filler 300 is cured, the slab frame 200 is connected. Precast slab track construction method characterized in that the screw jack (600) is installed at both ends of the part, and the longitudinal reinforcing bars (232) of each slab frame (200) are connected to each other. The method according to any one of claims 6 to 12, In order to connect the slab frame 200 and the slab frame 200 to manufacture a plurality of slab frame 200 is formed with a protrusion 254 to the outside at the time of manufacturing each slab frame 200, the manufactured slab frame After arranging (200) at a predetermined interval at a suitable position, and pouring the filler 300 under the slab frame 200, after the poured filler 300 is cured, between the slab frame 200 Precast slab trajectory characterized by interconnecting longitudinal reinforcing bars (232). The method of claim 6 or 10, The filler 300 is composed of asphalt emulsion, cement, sand, additives as a main component, the precast slab track characterized in that the compressive strength is made of 7 ~ 15MPa.

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