CN107083726A - The plate-type fragment-free track slab self-compacting concretes four of CRTS III connect block constructing device and method - Google Patents

Abstract

Connect block constructing device and method the invention provides a kind of plate-type fragment-free track slab self-compacting concretes four of CRTS III, constructing device includes：Bedplate；Track plates group, including four pieces of continuously arranged track plates；Block pulp framework, is vertically arranged between bedplate and track plates group at the surrounding edge in space；Track slab precision adjustment device, is arranged on longitudinal both sides of every piece of track plates；Expansion joint pressing device, including templates for expansion joints, expansion joint adjusting template and fixed mount, are vertically arranged in the expansion joint between track plates and adjacent orbit plate；Track plates pressing device, is arranged on the top surface of every piece of track plates of track plates group, and track plates pressing device includes compressing crossbeam and screw rod；Provisions for grouting, including walking dolly, mortar jar, slip hopper and infusion funnel.It is of the invention then an accurate adjustment need to be only carried out after four pieces of track plates of track plates group have been laid to carry out continuous pourings to four pieces of continuous orbit plate groups, it greatly reduce infusion time.The present invention both reduces labor intensity, also improves efficiency of construction.

Description

CRTSⅢ slab ballastless track slab self-compacting concrete four-block construction device and method

technical field

The invention relates to an under-slab self-compacting concrete pouring technology, in particular to a CRTSⅢ type slab ballastless track slab self-compacting four-block construction device and method.

Background technique

The CRTSⅢ slab ballastless track is a ballastless track with completely independent intellectual property rights developed and proposed on the basis of my country's existing ballastless track research and application experience. The main features of CRTSⅢ slab ballastless track are: the filling layer under the slab is replaced by self-compacting concrete with a special ratio, and the CA mortar used in the original Ⅰ and Ⅱ slab ballastless track is cancelled. The filling layer under the slab is located between the track slab and the base slab, and is an important structural component of the CRTSⅢ slab ballastless track. The self-compacting concrete used as the filling layer material under the slab needs to be poured after the fine adjustment of the track slab is completed. Self-compacting concrete has high fluidity, gap passability and segregation resistance. When pouring with it, it can be compacted only by its own weight without vibration. However, in the process of concrete casting, self-compacting concrete will affect the track slab. A huge buoyancy force is generated, which can easily cause the track slab to move, and when the self-compacting concrete is poured on the high curve section of the track, the track slab is prone to side slip. In addition, construction workers generally pour the underside of the track slab piece by piece, which virtually increases the construction cost and reduces the construction efficiency.

Contents of the invention

One of the objectives of the present invention is to provide a CRTSⅢ plate type ballastless track slab self-compacting concrete four-block construction device to solve the problem that the existing pouring device is easy to slide sideways and the track slab is in the self-compacting concrete pouring process. Easy to float, high construction cost and low construction efficiency.

The second object of the present invention is to provide a CRTSⅢ type slab ballastless track slab self-compacting concrete four-block construction method to solve the problem of easy side slipping of the track slab and track slab in the self-compacting concrete pouring process of the existing pouring method. Easy to float, high construction cost and low construction efficiency.

One of purpose of the present invention is achieved like this:

A CRTSⅢ slab type ballastless track slab self-compacting concrete four-block construction device, including:

For the base plate, a number of steel bar holes for inserting steel bars are preset inside it during production, and the steel bar holes of each base plate are set correspondingly to the track plate pressing device;

The track plate set includes four track plates arranged continuously, suspended above the base plate and opposite to the base plate, and three prefabricated track plates are arranged on each track plate of the track plate set The three prefabricated holes in each of the two track slabs in the middle are pouring openings, the prefabricated holes in the middle of each of the two track slabs at both ends are pouring openings, and the two track slabs at both ends The prefabricated holes at both ends of each track plate are exhaust overflow ports;

The slurry retaining frame is vertically arranged at the periphery of the gap between the base plate and the track plate group, and is surrounded by two longitudinal formwork groups and two transverse formwork groups to form a rectangular frame;

The track plate fine adjuster is arranged on the longitudinal sides of each track plate in the track plate group, and is used to adjust the setting height, center line and front and rear position of the track plate;

The expansion joint pressing device is vertically arranged in the expansion joint between the track plates of each set of track plates and the adjacent track plates, and is used to block the expansion joints between the track plates of the same group; The expansion joint pressing device includes an expansion joint formwork, an expansion joint adjustment formwork and a fixing frame for fixedly connecting the expansion joint formwork and the expansion joint adjustment formwork, the expansion joint formwork and the expansion joint adjustment formwork are both It is an L-shaped formwork, and the fixed frame is an X-shaped fixed frame; the expansion joint formwork is set opposite to the expansion joint adjustment formwork, and the bottom of one side of the expansion joint adjustment formwork is connected to the The side of the track plate is attached to the side, the bottom of one side of the expansion joint formwork is attached to the side of the track plate on the other side of the plate seam, and the expansion joint formwork is overlapped on the top of the expansion joint adjustment formwork surface; exhaust pipes are arranged on the expansion joint formwork and the expansion joint adjustment formwork;

The track slab pressing device is arranged on the top surface of each track slab of the track slab group, and its two ends are fixedly connected with the steel bars inserted into the pre-embedded steel bar holes of the base plate, and are used for fixing the track slabs Pressing and fixing; on the top surface of each track slab of the track slab group, a plurality of track slab pressing devices are arranged along the center line of the track slab; the track slab pressing devices include horizontal The compression beam arranged on the top surface of the track slab, the screw rods vertically connected to the two ends of the compression beam and the expansion joint fixing device arranged above the compression beam; The bottom end of the screw rod at the end is fixedly connected with the steel bar on the base plate, and the top end of the screw rod passes through the compression beam and is tightened by a nut; the expansion joint fixing device includes a plurality of horizontal longitudinal beams arranged horizontally, and the horizontal longitudinal beams The bolts are fixedly connected to the compression beams, and the bottom ends of the bolts on the horizontal longitudinal beams are pushed against the expansion joint formwork to compress the expansion joint formwork; and

The grouting device includes a walking trolley, a mortar tank, a chute and a pouring hopper; the walking trolley walks between two parallel tracks, and the walking direction of the walking trolley is parallel to the center line of the track plate, The trolley is provided with a pouring bucket support frame for hanging the pouring bucket; the mortar tank is fixed on the trolley, and the mortar tank is a hollow cavity with openings up and down. The opening at the bottom of the tank is provided with a discharge valve to control the discharge; the lower port of the pouring hopper is inserted into the pouring port of the track plate; the chute is arranged below the discharge valve of the mortar tank, which The discharge end is arranged above the filling hopper.

The horizontal formwork is arranged along a direction perpendicular to the centerline of the track slab; the longitudinal formwork group is arranged along a direction parallel to the centerline of the track slab, and each of the longitudinal formwork groups includes two end formwork assemblies and two middle formwork components Assemblies, the end formwork assembly corresponds to the track plate at the end of the track plate group one by one, and the middle formwork assembly corresponds to the track plate in the middle of the track plate group;

The end formwork assembly includes a short formwork with rounded corners arranged at the corner of the track formwork group and connected with the horizontal formwork, a long vertical formwork connected with the short formwork with rounded corners, and a longitudinal long formwork connected with the long formwork with longitudinal short template;

The intermediate formwork assembly includes a longitudinally long formwork and a longitudinally short formwork correspondingly connected to both ends of the longitudinally long formwork; at the position of the expansion joint between the track slab and the adjacent track slab on the slurry retaining frame There is an expansion joint exhaust template;

Air vents are all provided on the rounded short formwork, the longitudinal short formwork and the expansion joint formwork.

The upper part of the expansion joint adjustment formwork is uniformly provided with a plurality of nuts along the length direction, and each nut is connected with an adjustment screw for adjusting the installation height of the expansion joint adjustment formwork.

The number of track slab pressing devices arranged on the top surface of each track slab is at least five.

Anti-skid devices are provided at both ends of the slurry retaining frame in the transverse direction, and the anti-side slip devices include vertical beams fixed at both ends of the pressing beam, Formwork pressing blocks on the formwork and bolts for fixedly connecting the vertical beams with the formwork pressing blocks.

The invention adopts the self-compacting concrete pouring method of four consecutive track slabs, that is, every four continuous track slabs are connected into a track slab group, and the purpose of pouring four track slabs at the same time can be realized in one pouring, instead of only one track slab each time. The traditional single track slab pouring method of pouring a track slab reduces the amount of formwork used and construction procedures, such as reducing the number of fine adjustments to the track slab. The traditional single track slab pouring method The track slabs need to be fine-tuned once before pouring. If four track slabs are poured, four track slabs need to be fine-tuned four times, but the present invention only needs to be fine-tuned once after laying the four track slabs of the track slab group. For pouring, the number of fine adjustments is greatly reduced. The invention not only reduces the labor intensity, but also improves the construction efficiency.

Two of purpose of the present invention is achieved like this:

A CRTSⅢ slab type ballastless track slab self-compacting concrete four-block construction method, including the following steps:

a. On the base plate, pop up the position contour lines of the corresponding four track plates of each set of track plates according to the plate distribution diagram, place wooden pads on the base plate corresponding to the hoisting holes of each track plate, and use a crane to place the corresponding The track plate is placed on the wooden pad; three prefabricated holes are arranged on each track plate of the track plate group;

The three prefabricated holes in each of the two track slabs in the middle are pouring ports; the prefabricated holes in the middle of each of the two track slabs at both ends are pouring ports; The prefabricated holes at both ends of each track plate are exhaust overflow ports;

b. Install track plate fine adjusters on both longitudinal sides of each track plate in the track plate group, and use the track plate fine adjuster to adjust the track plates up and down, left and right, and forward and backward until the height and center of the track plate Line and front and rear positions meet the preset requirements;

c. Install the slurry retaining frame on the base plate so that the slurry retaining frame fits with the bottom of the four sides of the track plate group; the slurry retaining frame is a rectangular frame surrounded by two longitudinal formwork groups and two horizontal formworks ;

d. On the top surface of each track plate of the track plate group, a plurality of track plate pressing devices are arranged along the center line of the track plate, and the track plate pressing devices include horizontally arranged on the The compression beam on the top surface of the track slab and the screw rods vertically penetrated at both ends of the compression beam, the bottom end of the screw rod penetrates and is fixedly installed on the steel bar on the base plate, and the top end of the screw rod Pass through the compression beam and tighten with nuts;

e. Install an expansion joint pressing device and an expansion joint fixing device in the expansion joints between the track slabs of each set of track slabs and the adjacent track slabs, and the expansion joint fixing device and the track slab pressing device The compression beam in the fixed connection;

f. Anti-skid devices are provided at both ends of the track plate pressing device;

g, a walking trolley is placed between two parallel tracks, the walking direction of the walking trolley is parallel to the center line of the track slab, the mortar tank filled with self-compacting concrete mortar is installed on the walking trolley, The opening at the bottom of the mortar tank is provided with a discharge valve to control the discharge, and a pouring bucket is inserted into the pouring port of one of the track slabs at the end of the track slab group, and a downward slope is set below the discharge valve of the mortar tank. The chute, the discharge end of the chute is set above the pouring hopper, the self-compacting concrete mortar is sent to the pouring hopper above the track plate through the chute, and injected into the pouring hopper formed by the track plate, In the cavity surrounded by the base plate and the grout frame;

h. Prepare a spare mortar tank and fill the spare mortar tank with self-compacting concrete mortar. After the mortar tank on the trolley is filled, remove the empty mortar tank and place the spare mortar tank on the trolley. Another tank has been installed The full material is delivered, and the two mortar tanks are used alternately.

7. The construction method of CRTSⅢ slab ballastless track slab self-compacting concrete four-block construction method according to claim 6, characterized in that, in step e, the expansion joint pressing device is vertically installed on each group of the track In the expansion joint between the track plate of the plate group and the adjacent track plate, it is used to block the expansion joint between the same set of track plates;

The expansion joint pressing device includes an expansion joint formwork, an expansion joint adjustment formwork and a fixing frame for fixedly connecting the expansion joint formwork and the expansion joint adjustment formwork, the expansion joint formwork and the expansion joint adjustment formwork are both It is an L-shaped formwork, and the fixed frame is an X-shaped fixed frame; the expansion joint formwork is set opposite to the expansion joint adjustment formwork, and the bottom of one side of the expansion joint adjustment formwork is connected to the The side of the track plate is attached to the side, the bottom of one side of the expansion joint formwork is attached to the side of the track plate on the other side of the plate seam, and the expansion joint formwork is overlapped on the top of the expansion joint adjustment formwork surface; exhaust pipes are arranged on both the expansion joint formwork and the expansion joint adjustment formwork.

In step f, the anti-skid device includes vertical beams fixedly arranged at both ends of the pressing beam, formwork pressing blocks fixedly arranged on the formwork opposite to the vertical beam of the longitudinal formwork group, and fixedly connected The bolts of the vertical beam and the template compression block.

In step g, in order to ensure that the self-compacting concrete mortar successfully pours and fills the cavities under the four track slabs of the track slab group, the pouring hopper is inserted into all the pouring openings of the middle two track slabs and the other one in turn. Pour gates for end track slabs.

In step g, the bottom surface of the track slab is pre-wetted before pouring the self-compacting concrete mortar into the cavity surrounded by the track slab, the base plate and the grout frame. Insert the atomizing nozzle into the prefabricated hole, and turn the atomizing nozzle 360° after turning on the atomizing nozzle to make the bottom surface of the track plate wet without water accumulation.

The invention realizes the simultaneous construction of four blocks in the self-compacting concrete pouring of CRTSⅢ slab ballastless track slabs, ensures the construction quality, improves the construction speed, and reduces the follow-up gap filling work during the construction of self-compacting concrete without expansion joints. Save construction costs, etc. During the simultaneous pouring of four tracks, the connection problem of the four tracks of the track slab group was successfully solved. While improving the construction efficiency, it also effectively solved the problems of the track slab's floating, sideslip and grout leakage.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a top view of the grouting device of the present invention after removal.

Fig. 3 is a partial structural schematic view of the grouting device of the present invention after removal.

Fig. 4 is a front view of part of the structure of the present invention after removing the grouting device.

Fig. 5 is a side view of the grouting device of the present invention after removal.

Fig. 6 is a schematic structural view of the expansion joint pressing device of the present invention.

In the figure: 1. Base plate; 2. Track plate; 4. Transverse template; 6. Expansion joint pressing device; 8. Walking trolley; 9. Mortar tank; 10. Chute; Material valve; 13. Track plate fine adjuster; 14. Vertical beam; 14-1. Connecting plate; 15. Template pressing block; 21. Prefabricated hole; Longitudinal short formwork; 54, expansion joint exhaust formwork; 61, expansion joint formwork; 62, expansion joint adjustment formwork; 63, fixed frame; 64, horizontal longitudinal beam; 65, adjustment screw; Tight beam; 11-1, pouring bucket support frame; 13-1, elevation adjustment rod; 13-2, first level adjustment rod; 13-3, second level adjustment rod.

detailed description

Example 1: A CRTSⅢ slab type ballastless track slab self-compacting concrete four-block construction device.

As shown in Figures 1 to 6, the CRTSⅢ plate type ballastless track slab self-compacting concrete four-block construction device of the present invention includes a base plate 1, a track slab group, a slurry retaining frame, a track slab fine adjuster 13, and expansion joints Pressing device 6, track plate pressing device and grouting device.

Base plate 1, preset a plurality of steel bar holes for inserting steel bars inside it during production, the steel bar holes of each base plate are set correspondingly with the track plate pressing device, in this embodiment, on the edge of each base plate The number of steel bar holes on both sides of the horizontal direction is five, and the steel bar holes are set correspondingly to the track plate pressing device. The diameter of the reinforcement hole is greater than or equal to 22 mm.

The track plate set includes four track plates 2 arranged continuously, suspended above the base plate 1 and set opposite to the base plate 1, and each track plate 2 of the track plate set is provided with three prefabricated holes 21, prefabricated The line connecting the centers of the holes 21 coincides with the center line of the track plate 2 . There is a certain distance between the track plate group and the base plate 1, and a hollow cavity is surrounded by the track plate group, the base plate 1 and the slurry retaining frame.

The grout frame is vertically arranged on the periphery of the gap between the base plate 1 and the track plate group, and is surrounded by two longitudinal formwork groups and two transverse formwork sets 4 to form a rectangular frame. In the invention, the transverse direction is the direction perpendicular to the centerline of the track slab, and the longitudinal direction is the direction parallel to the centerline of the track slab. The horizontal formwork 4 is arranged along a direction perpendicular to the centerline of the track slab, and the longitudinal formwork group is arranged along a direction parallel to the centerline of the track slab. The top surface of the grout frame is higher than the bottom surface of the track slab. Each longitudinal formwork set includes two end formwork assemblies and two intermediate formwork assemblies, the end formwork assemblies correspond to the track plates 2 at the end of the track plate set, and the middle formwork assembly corresponds to the track plate in the middle of the track plate set 2 one-to-one correspondence. The end formwork assembly includes a short formwork 51 with rounded corners connected to the horizontal formwork 4 arranged at the corner of the track formwork group, a long vertical formwork 52 connected with the short formwork 51 at rounded corners, and a short vertical formwork 53 connected with the long formwork 52 . The middle formwork assembly includes a longitudinally long formwork 52 and a longitudinally short formwork 53 correspondingly connected to two ends of the longitudinally long formwork 52 . An expansion joint exhaust formwork 54 is provided at the position corresponding to the expansion joint between the track slab 2 and the adjacent track slab 2 of the slurry retaining frame. The part of the rounded short template 51 corresponding to the corner of the track plate is set in a circular arc structure. Vent holes are provided on the rounded short formwork 51 and the longitudinal short formwork 53, which effectively prevents the problems of joints, air holes and laitance accumulation that are easy to occur in multi-point casting, and also ensures that the distance from the pouring hole to the four corners is the same , the resistance is equivalent, and the density of the formed concrete is the same. At the air vents of the rounded short formwork 51 and the longitudinal short formwork 53, there are movable inserting plates which can move up and down for blocking the air vents. In this embodiment: the number of rounded short templates 51 is 4, the number of longitudinal long templates 52 is 8, the number of longitudinal short templates 53 is 12, and the number of expansion joint exhaust templates 54 is 6. The formwork of the grouting frame is a detachable structure, which can be used for all length unit modules, with high recycling rate, cost saving and convenient construction management.

The track plate fine adjuster 13 is arranged on the longitudinal two sides of each track plate 2 of the track plate group, and is used to adjust the setting height, centerline and front and rear positions of the track plate 2. Both ends of the vertical sides of each track slab are provided with a track slab fine adjuster 13, in the present embodiment, each track slab fine adjuster 13 is connected with the track slab by bolts, and the thread outer diameter of the bolt is 24mm. mm. The track slab fine adjuster 13 includes an elevation adjustment lever 13-1 for adjusting the height of the track slab, a first level adjustment lever 13-2 for adjusting the center line of the track slab, and a second horizontal adjustment lever 13-2 for adjusting the front and rear positions of the track slab. Rod 13-3. The track plate fine adjuster 13 has up and down, left and right, and front and rear three-dimensional adjustment functions, which can realize precise positioning for four consecutive track plates. The bottom of the track plate fine adjuster 13 is provided with a base plate, on which a concave-convex pattern is arranged, the bottom surface of the base plate is designed as a slope, the slope of the base plate is the same as the drainage slope of the base plate, which can ensure that the fine adjuster is perpendicular to the surface of the track plate , making the position accuracy adjustment of the track plate more efficient and effective.

The expansion joint pressing device 6 is vertically arranged in the expansion joints between the track plates 2 of each set of track plates and the adjacent track plates 2, and is used to block the expansion joints between the track plates of the same group. In this embodiment, the width of expansion joints between the track slabs in the track slab group and adjacent track slabs ranges from 70 mm to 80 mm. The expansion joint pressing device 6 includes an expansion joint formwork 61, an expansion joint adjustment formwork 62 and a fixed frame 63 for fixedly connecting the expansion joint formwork 61 and the expansion joint adjustment formwork 62, the expansion joint formwork 61 and the expansion joint adjustment formwork 62 are both L The upper part of the expansion joint adjustment formwork 62 is evenly provided with a plurality of nuts along the length direction, and each nut is connected with an adjustment screw 65 for adjusting the installation height of the expansion joint adjustment formwork 62. On the expansion joint formwork 61, Provided with vent holes. The fixing frame 63 is an X-shaped fixing frame. The expansion joint formwork 61 is arranged opposite to the expansion joint adjustment formwork 62, the bottom of one side of the expansion joint adjustment formwork 62 is set in close contact with the side of the track plate 2 arranged on the corresponding side of the plate seam, and the bottom of one side of the expansion joint formwork 61 is arranged on the side of the plate. The side of the track plate 2 on the other side of the seam is fitted, and the expansion joint formwork 61 is lapped on the top surface of the expansion joint adjustment formwork 62, and the bottom surface of the expansion joint adjustment formwork 62 is slightly lower than the bottom surface of the track plate. Between the expansion joint formwork 61 and Exhaust pipes 66 are provided on the expansion joint adjustment templates 62 . The fixing frame 63 is fixedly arranged between the expansion joint template 61 and the expansion joint adjusting template 62, and each expansion joint pressing device 6 includes four fixing frames 63, and the fixing frames 63 are arranged along the horizontal direction of the track plate, which can ensure that the expansion joints are well fixed during pouring. Adjust formwork and expansion joint formwork 61 can not be deformed because of the excessive pressure of concrete.

The track plate pressing device is arranged on the top surface of each track plate 2 of the track plate group, and its two ends are fixedly connected with the steel bars inserted into the pre-embedded steel bar holes of the base plate 1, and are used for pressing and fixing the track plate 2 . On the top surface of each track plate 2 of the track plate group, a plurality of track plate pressing devices are arranged along the center line of the track plate, and the number of track plate pressing devices arranged on the top surface of each track plate 2 is at least for five. In this embodiment, five track slab pressing devices are arranged on the top surface of each track slab 2 along the centerline of the track slab to ensure that the entire track slab is stressed evenly. The track slab pressing device includes a pressing beam 71 horizontally arranged on the top surface of the track slab 2 , a screw rod vertically connected to both ends of the pressing beam 71 and an expansion joint fixing device arranged above the pressing beam 71 . The bottom ends of the screw rods arranged at both ends of the compression beam are fixedly connected with the steel bars on the base plate 1, and the top ends of the screw rods pass through the compression beam 71 and are tightened by nuts. The expansion joint fixing device includes a plurality of horizontal longitudinal beams 64 arranged horizontally. The horizontal longitudinal beams 64 overlap the tops of the compression beams 71 on both sides of the expansion joints. The central axis of the horizontal longitudinal beams 64 is parallel to the center line of the track plate 2. The ends of the horizontal longitudinal beams 64 are fixedly connected to the pressing beams 71 on the corresponding side through bolts, and the bottom ends of the bolts on the horizontal longitudinal beams 64 are pushed against the expansion joint formwork 61 to compress the expansion joint formwork 61 to further ensure The width of the expansion joint during pouring improves the construction accuracy.

Whether it is a subgrade road section, a bridge, or a tunnel section, there are straight road sections (referred to as straight sections) and curved road sections (referred to as curved sections). For the straight section, the base plate and the track plate are both horizontal, while for the curved section, the base plate and the track plate are inclined at a certain angle. In this state, the track plate is very easy to slip along the inclined direction. If the track plate slides sideways, the present invention is equipped with anti-sideslip devices at both ends of the slurry retaining frame. The anti-sideslip devices include vertical beams 14 fixedly arranged at the two ends of the pressing beam 71, fixedly arranged on the longitudinal template group and The formwork pressing block 15 on the relative formwork of vertical beam 14 and the bolt that is used for fixedly connecting vertical beam 14 and formwork pressing block 15, in the present embodiment, is used for fixedly connecting vertical beam 14 and formwork pressing block 15 The tail end of the bolt is arranged as a hemispherical structure, and a connecting plate 14-1 is arranged on the side of the vertical beam 14 opposite to the upper template pressing block 15, and a connecting hole is arranged on the connecting plate 14-1, and the bolt passes through The connecting hole on the connecting plate 14-1 is screwed in the template pressing block 15. The detachable structure of the anti-skid device only reserves positioning installation holes on the connecting plate 14-1 of the pressing beam, which improves the recycling rate of the track plate pressing device and reduces management costs.

The grouting device comprises a walking trolley 8, a mortar tank 9, a chute 10 and a pouring hopper 11; the walking trolley 8 is placed between two parallel tracks, and the walking direction of the walking trolley 8 is parallel to the center line of the track plate 2, When the construction track is a double track, the walking trolley 8 walks on the centerline between the double tracks. The trolley 8 is provided with a pouring bucket support frame 11-1 for hanging the pouring bucket 11; the mortar tank 9 is fixedly arranged on the trolley 8, and the mortar tank 9 is a hollow cavity with openings up and down, at the bottom of the mortar tank 9 A discharge valve 12 for controlling discharge is provided at the opening; the lower port of the filling hopper 11 is inserted into the pouring mouth of the track plate 2; the chute 10 is arranged below the discharge valve 12 of the mortar tank 9, and the discharge end is set Above the pouring funnel 11.

Example 2: A construction method of four-block self-compacting concrete for CRTSⅢ slab ballastless track slabs.

As shown in Figures 1 to 6, a CRTSⅢ slab ballastless track slab self-compacting concrete four-block construction method includes the following steps:

a. On the base plate 1, pop up the position contour lines of the corresponding four track plates 2 of each track plate group according to the plate distribution diagram, and place wooden spacers on the base plate 1 corresponding to the hoisting holes of each track plate 2, Use a crane to place the corresponding track slab 2 on the wooden pad, the thickness of the wooden pad is equal to the thickness of the self-compacting concrete pouring layer. The wooden spacer is placed about 10cm inside the fine adjuster support for the lofting of the base plate. Within ±10mm.

The expansion joint width range between the track slabs in the track slab group and the adjacent track slabs is 70mm~80mm. Prefabricated holes 21 are arranged on both sides and the middle of each track slab 2 of the track slab group, that is, three prefabricated holes are arranged on each track slab 2 .

b. Install the track plate fine adjuster 13 on the longitudinal sides of each track plate 2 of the track plate group, and use the track plate fine adjuster 13 to adjust the track plate 2 up and down, left and right and forward and backward until the track plate 2 The height, center line and front and rear positions meet the preset requirements. During installation, the track plate fine adjuster 13 is left, right, front, back, and left symmetrical, so that adjustment space is reserved up, down, left, right, front, back, and front. After the track plate fine adjuster 13 is installed, it should be utilized to lift the track plate slightly to withdraw the wooden pad under the track plate. Carry out the rough adjustment of the track plate 2 before utilizing the track plate fine adjuster 13 to carry out the fine adjustment. During the coarse adjustment, the horizontal position is first adjusted, and then the elevation is adjusted. When the level is adjusted, the left side, the right side, the front side and the rear side are adjusted simultaneously Make the position deviation of the track plate within ±5mm. When adjusting the height, use a 1m-long level to overlap the adjusted track slab, press the level and place it on one end of the adjusted track slab, and measure the height difference at the other end to make the height difference less than or equal to 2mm .

When using the track plate fine adjuster 13 for fine adjustment, the measuring instrument is installed so that it cooperates with the CPⅢ measurement control network and the PDA fine adjustment software to survey and map the position of the track plate, and according to the deviation between the measured value and the theoretical value, use the track plate The fine adjuster 13 precisely adjusts the spatial position of the track plate. The fine adjustment operation follows the adjustment sequence of the elevation first and then the level. The operator obeys the command of the surveyor and adjusts the opposite sides at the same time during the level adjustment. The smooth transition of the line until it meets the design requirements. After the fine-tuning is completed, the fine-tuning site should clearly mark the fine-tuning area, set up warning lines, and prohibit stepping on the track slabs that have been fine-tuned, so as to prevent the deformation of the track slabs and affect the accuracy of subsequent track laying.

In this embodiment, track plate fine adjusters 13 are provided at both ends of the longitudinal sides of each track plate, and the track plate fine adjusters 13 are connected to the side surfaces of the track plate 2 by bolts, and each track plate is finely adjusted. Device 13 is connected with track plate by bolt, and the screw thread outer diameter of bolt is 24 millimeters. The track slab fine adjuster 13 includes an elevation adjustment lever 13-1 for adjusting the height of the track slab, a first level adjustment lever 13-2 for adjusting the center line of the track slab, and a second horizontal adjustment lever 13-2 for adjusting the front and rear positions of the track slab. Rod 13-3. The track plate fine adjuster 13 has up and down, left and right, and front and rear three-dimensional adjustment functions, which can realize precise positioning for four consecutive track plates. The bottom of the track plate fine adjuster 13 is provided with a base plate, and a concave-convex pattern is provided on the base plate to increase adhesion and stability with the ground. The bottom surface of the bottom plate is designed as a slope, which is the same as the drainage slope of the base plate, which can ensure that the fine adjuster is perpendicular to the surface of the track plate, making the position accuracy adjustment of the track plate faster and more effective.

c. After the fine adjustment is completed, install the slurry retaining frame on the base plate 1, so that the slurry retaining frame fits with the bottom of the four sides of the track plate group, and the top surface of the slurry retaining frame is higher than the bottom surface of the track plate. The grouting frame is a rectangular frame surrounded by the longitudinal template group and two horizontal templates 4 . In the present invention, the transverse direction is the direction perpendicular to the centerline of the track slab, and the longitudinal direction is the direction parallel to the centerline of the track slab. The horizontal formwork 4 is arranged along a direction perpendicular to the centerline of the track slab, and the longitudinal formwork group is arranged along a direction parallel to the centerline of the track slab. The top surface of the grout frame is higher than the bottom surface of the track slab. Each longitudinal formwork set includes two end formwork assemblies and two intermediate formwork assemblies, the end formwork assemblies correspond to the track plates 2 at the end of the track plate set, and the middle formwork assembly corresponds to the track plate in the middle of the track plate set 2 one-to-one correspondence. The end formwork assembly includes a short formwork 51 with rounded corners connected to the horizontal formwork 4 arranged at the corner of the track formwork group, a long vertical formwork 52 connected with the short formwork 51 at rounded corners, and a short vertical formwork 53 connected with the long formwork 52 . The middle formwork assembly includes a longitudinally long formwork 52 and a longitudinally short formwork 53 correspondingly connected to two ends of the longitudinally long formwork 52 . An expansion joint exhaust formwork 54 is provided at the position corresponding to the expansion joint between the track slab 2 and the adjacent track slab 2 of the slurry retaining frame. The part of the rounded short template 51 corresponding to the corner of the track plate is set in a circular arc structure. Vent holes are provided on the rounded short formwork 51 and the longitudinal short formwork 53, which effectively prevents the problems of joints, air holes and laitance accumulation that are easy to occur in multi-point casting, and also ensures that the distance from the pouring hole to the four corners is the same , the resistance is equivalent, and the density of the formed concrete is the same. At the air vents of the rounded short formwork 51 and the vertical short formwork 53, there are movable inserts that can move up and down for blocking the vents. The inserts on the rounded short formwork 51 are arc inserts, vertical The board on the short template 53 is a plane board. In this embodiment: the number of rounded short templates 51 is 4, the number of longitudinal long templates 52 is 8, the number of longitudinal short templates 53 is 12, and the number of expansion joint exhaust templates 54 is 6. The formwork of the grouting frame is a detachable structure, which can be used for all length unit modules, with high recycling rate, cost saving and convenient construction management.

d. On the top surface of each track plate 2 of the track plate group, a plurality of track plate pressing devices are arranged along the center line of the track plate. The crossbeam 71, the screw rods vertically connected to the two ends of the compression beam 71 and the expansion joint fixing device arranged above the compression beam, the bottom ends of the screws arranged at the two ends of the compression beam are fixedly connected with the steel bars on the base plate 1, and the screw The top of the top passes through the compression beam 71 and is tightened by a nut. The expansion joint fixing device includes a plurality of horizontal longitudinal beams 64 arranged horizontally. The horizontal longitudinal beams overlap the tops of the compression beams 71 on both sides of the expansion joint. The ends of the longitudinal beams 64 are fixedly connected to the pressing beams 71 on the corresponding side by bolts, and the bottom ends of the bolts on the horizontal longitudinal beams 64 are fixed on the expansion joint formwork 61 to compress the expansion joint formwork 61, further ensuring The width of the expansion joint during pouring improves the construction accuracy.

e. Install an expansion joint pressing device 6 in the expansion joint between the track plate 2 of each set of track plates and the adjacent track plate 2 . The expansion joint pressing device 6 includes an expansion joint formwork 61, an expansion joint adjustment formwork 62 and a fixed frame 63 for fixedly connecting the expansion joint formwork 61 and the expansion joint adjustment formwork 62, the expansion joint formwork 61 and the expansion joint adjustment formwork 62 are both L formwork, the fixed frame 63 is an X-shaped fixed frame; the expansion joint formwork 61 is arranged opposite to the expansion joint adjustment formwork 62, and the bottom of one side of the expansion joint adjustment formwork 62 is fitted to the side of the track plate 2 that is arranged on the corresponding side of the plate seam. The bottom of one side of the expansion joint formwork 61 is attached to the side of the track plate 2 arranged on the other side of the plate seam. The expansion joint formwork 61 is overlapped on the top surface of the expansion joint adjustment formwork 62, and the expansion joint formwork and the expansion joint adjustment formwork Exhaust pipes are arranged on the top, and the exhaust pipes on the expansion joint formwork are installed at the exhaust holes of the expansion joint formwork.

f. Anti-skid devices are installed at both ends of the slurry retaining frame. The anti-skid device comprises a vertical beam 14 fixedly arranged on the two ends of the compression beam 71, a formwork pressing block 15 fixedly arranged on the formwork opposite to the vertical beam 14 of the longitudinal formwork group, and a formwork pressing block 15 for fixedly connecting the vertical beam 14 and the formwork pressure. The bolt of tight block 15, in the present embodiment, is used for fixing the tail end of the bolt that connects vertical beam 14 and template pressing block 15 to be arranged as hemispherical structure, in vertical beam 14 and upper formwork pressing block 15 relative A connecting plate 14-1 is arranged on one side, and a connecting hole is arranged on the connecting plate 14-1, and bolts are screwed into the template pressing block 15 through the connecting holes on the connecting plate 14-1. In this embodiment, one end of the pressing beam 71 is provided with an anti-sideslip bracket, the upper part of the anti-sideslip bracket is inclined to the middle of the pressing beam 71, and the installation end of the anti-sideslip bracket of the pressing beam 71 is higher than its another side. The top of the anti-skid support is rotatably connected with the compression beam 71 by bolts, which can realize the adjustment of the installation angle of the anti-skid support. The top of the anti-skid bracket is provided with jacking bolts for fastening it to the top of the compression beam 71. This detachable structure of the anti-side skid device is only reserved for positioning on the connecting plate 14-1 of the compression beam. The installation hole improves the recycling rate of the track plate pressing device and reduces the management cost.

g. Fill the self-compacting concrete mortar within 24 hours after the fine adjustment is completed, and perform self-compacting concrete mortar pouring on the bottom surface of the track slab 1 hour before pouring the self-compacting concrete mortar in the cavity surrounded by the track slab, base plate and grout frame Pre-wetting, the operation method is to extend the atomizing nozzle from all the prefabricated holes of each track plate, turn the atomizing nozzle 360° after turning on the atomizing nozzle, so that the bottom surface of the track plate is wet without water accumulation, and the atomizing nozzle rotates The 360° time is 10 seconds, so that the bottom surface is wet without water accumulation. Fill the self-compacting concrete mortar in the mortar tank 9, and a walking trolley 8 is placed on one side of the track slab 2. 9 is installed on the walking trolley 8, and the opening at the bottom of the mortar tank 9 is provided with a discharge valve 12 for controlling discharge. The three prefabricated holes in each of the two track slabs in the middle are pouring ports; the prefabricated holes in the middle of each of the two track slabs at both ends are pouring ports; The prefabricated holes at both ends of each track plate are exhaust overflow ports. Insert pouring hopper 11 in the pouring port of one of the track slabs at the end of the track slab group, set downwardly inclined chute 10 below the discharge valve 12 of mortar tank 9, and the discharge end of chute 10 is set Above the pouring hopper 11, the self-compacting concrete mortar is sent to the pouring hopper 11 above the track plate 2 through the chute 10, and injected into the pouring hopper 11 surrounded by the track plate 2, the base plate 1 and the grout frame. within the cavity. In order to ensure that the self-compacting concrete mortar successfully fills the cavities under the four track slabs 2 of the track slab group, insert the pouring bucket 11 into all the pouring openings and the other end of the two middle track slabs 2 of the track slab group in sequence. Pour gates for track slabs. In this embodiment, a feed pipe for connecting the pouring hopper 11 and the prefabricated hole is provided on the pouring ports of the four track slabs 2 of the track slab group, and the distance between the top end of the feed pipe and the top surface of the track slab is greater than or equal to 70 cm; an exhaust overflow pipe is arranged on the exhaust overflow port on the track plate at the end of the track plate group, and the distance between the top of the exhaust overflow pipe and the top surface of the track plate is greater than or equal to 30 cm. During the pouring process, carefully observe the downward flow rate of the self-compacting concrete mortar to ensure the continuity of the blanking, and the flow should not be interrupted in the middle to avoid bringing in air. Control the discharge volume through the discharge valve 12 on the mortar tank, and observe the exhaust overflow holes on both sides of the track plate, the exhaust holes on the rounded formwork and the expansion joint exhaust formwork at any time based on the principle of fast first and then slow When the vent hole on the fillet formwork and the vent hole on the expansion joint vent formwork have mortar overflowing, install the corresponding movable insert immediately and reduce the feeding speed to ensure that the middle layer All air is evacuated. When the mortar in the exhaust overflow pipe on both sides of the track slab is 30cm higher than the top surface of the track slab, the pouring should be stopped immediately.

h. Prepare a spare mortar tank 9, fill the spare mortar tank 9 with self-compacting concrete mortar, after the mortar tank 9 on the trolley 8 is filled, remove the empty mortar tank 9, and place the spare mortar tank 9 on the trolley Another tank on 8 has been filled with material and delivered, and two mortar tanks 9 are used alternately. In this embodiment, the volume of the mortar tank 9 is the amount of self-compacting concrete mortar for a single track slab, that is, each tank of self-compacting concrete mortar just fits into the concrete filling layer at the bottom of a track slab.

In the process of cooperating with the construction team, the present invention is a set of efficient and practical construction methods that are finally summed up through continuous exploration, continuous improvement, and continuous innovation, which is conducive to the guarantee of construction quality and construction progress. All The process is continuous, and the operation is flexible and convenient. In the construction of self-compacting concrete filling layer, the construction efficiency is effectively improved and the construction progress is accelerated.

Claims (10)

1. A CRTSⅢ slab ballastless track slab self-compacting concrete four-block construction device, characterized in that it includes: The base plate is provided with a plurality of steel bar holes for inserting steel bars inside during production, and the steel bar holes of each base plate are set correspondingly to the track plate pressing device; The track plate set includes four track plates arranged continuously, suspended above the base plate and opposite to the base plate, and three prefabricated track plates are arranged on each track plate of the track plate set The three prefabricated holes in each of the two track slabs in the middle are pouring openings, the prefabricated holes in the middle of each of the two track slabs at both ends are pouring openings, and the two track slabs at both ends The prefabricated holes at both ends of each track plate are exhaust overflow ports; The slurry retaining frame is vertically arranged at the periphery of the gap between the base plate and the track plate group, and is surrounded by two longitudinal formwork groups and two transverse formwork groups to form a rectangular frame; The track plate fine adjuster is arranged on the longitudinal sides of each track plate in the track plate group, and is used to adjust the setting height, center line and front and rear position of the track plate; The expansion joint pressing device is vertically arranged in the expansion joint between the track plates of each set of track plates and the adjacent track plates, and is used to block the expansion joints between the track plates of the same group; The expansion joint pressing device includes an expansion joint formwork, an expansion joint adjustment formwork and a fixing frame for fixedly connecting the expansion joint formwork and the expansion joint adjustment formwork, the expansion joint formwork and the expansion joint adjustment formwork are both It is an L-shaped formwork, and the fixed frame is an X-shaped fixed frame; the expansion joint formwork is set opposite to the expansion joint adjustment formwork, and the bottom of one side of the expansion joint adjustment formwork is connected to the The side of the track plate is attached to the side, the bottom of one side of the expansion joint formwork is attached to the side of the track plate on the other side of the plate seam, and the expansion joint formwork is overlapped on the top of the expansion joint adjustment formwork surface; exhaust pipes are arranged on the expansion joint formwork and the expansion joint adjustment formwork; The track slab pressing device is arranged on the top surface of each track slab of the track slab group, and its two ends are fixedly connected with the steel bars inserted into the pre-embedded steel bar holes of the base plate, and are used for fixing the track slabs Pressing and fixing; on the top surface of each track slab of the track slab group, a plurality of track slab pressing devices are arranged along the center line of the track slab; the track slab pressing devices include horizontal The compression beam arranged on the top surface of the track slab, the screw rods vertically connected to the two ends of the compression beam and the expansion joint fixing device arranged above the compression beam; The bottom end of the screw rod at the end is fixedly connected with the steel bar on the base plate, and the top end of the screw rod passes through the compression beam and is tightened by a nut; the expansion joint fixing device includes a plurality of horizontal longitudinal beams arranged horizontally, and the horizontal longitudinal beams The bolts are fixedly connected to the compression beams, and the bottom ends of the bolts on the horizontal longitudinal beams are pushed against the expansion joint formwork to compress the expansion joint formwork; and The grouting device includes a walking trolley, a mortar tank, a chute and a pouring hopper; the walking trolley walks between two parallel tracks, and the walking direction of the walking trolley is parallel to the center line of the track plate, The trolley is provided with a pouring bucket support frame for hanging the pouring bucket; the mortar tank is fixed on the trolley, and the mortar tank is a hollow cavity with openings up and down. The opening at the bottom of the tank is provided with a discharge valve to control the discharge; the lower port of the pouring hopper is inserted into the pouring port of the track plate; the chute is arranged below the discharge valve of the mortar tank, which The discharge end is arranged above the filling hopper. 2. The CRTSⅢ slab type ballastless track slab self-compacting concrete four-block construction device according to claim 1, characterized in that, the transverse formwork is arranged along a direction perpendicular to the centerline of the track slab; the longitudinal formwork group is set along the Set in a direction parallel to the center line of the track slab, each of the longitudinal formwork groups includes two end formwork assemblies and two middle formwork assemblies, and the end formwork assemblies correspond to the track slabs at the end of the track slab group one by one , the middle formwork assembly is in one-to-one correspondence with the track slabs in the middle of the track slab group; The end formwork assembly includes a short formwork with rounded corners arranged at the corner of the track formwork group and connected with the horizontal formwork, a long vertical formwork connected with the short formwork with rounded corners, and a longitudinal long formwork connected with the long formwork with longitudinal short template; The intermediate formwork assembly includes a longitudinally long formwork and a longitudinally short formwork correspondingly connected to both ends of the longitudinally long formwork; at the position of the expansion joint between the track slab and the adjacent track slab on the slurry retaining frame There is an expansion joint exhaust template; Air vents are all provided on the rounded short formwork, the longitudinal short formwork and the expansion joint formwork. 3. The CRTSⅢ slab type ballastless track slab self-compacting concrete four-block construction device according to claim 1, characterized in that, the upper part of the expansion joint adjustment template is evenly provided with a plurality of nuts along the length direction, and each Adjusting screw rods for adjusting the installation height of the expansion joint adjustment formwork are threaded on the nuts. 4. The CRTS III type slab ballastless track slab self-compacting concrete four-block construction device according to claim 1 is characterized in that the number of track slab pressing devices arranged on the top surface of each track slab is at least for five. 5. The CRTSⅢ slab type ballastless track slab self-compacting concrete four-block construction device according to claim 1, characterized in that, anti-skid devices are provided at both ends of the grout retaining frame in the transverse direction, and the anti-slip The side sliding device includes vertical beams fixedly arranged at both ends of the pressing beam, formwork pressing blocks fixedly arranged on the formwork opposite to the vertical beam of the longitudinal formwork group and used for fixedly connecting the vertical beam with the formwork pressing block. Tight block of bolts. 6. A CRTSⅢ slab type ballastless track slab self-compacting concrete four-block construction method, characterized in that it includes the following steps: a. On the base plate, pop up the position contour lines of the corresponding four track plates of each set of track plates according to the plate distribution diagram, place wooden pads on the base plate corresponding to the hoisting holes of each track plate, and use a crane to place the corresponding The track plate is placed on the wooden pad; three prefabricated holes are arranged on each track plate of the track plate group; The three prefabricated holes in each of the two track slabs in the middle are pouring ports; the prefabricated holes in the middle of each of the two track slabs at both ends are pouring ports; The prefabricated holes at both ends of each track plate are exhaust overflow ports; b. Install track plate fine adjusters on both longitudinal sides of each track plate in the track plate group, and use the track plate fine adjuster to adjust the track plates up and down, left and right, and forward and backward until the height and center of the track plate Line and front and rear positions meet the preset requirements; c. Install the slurry retaining frame on the base plate so that the slurry retaining frame fits with the bottom of the four sides of the track plate group; the slurry retaining frame is a rectangular frame surrounded by two longitudinal formwork groups and two horizontal formworks ; d. On the top surface of each track plate of the track plate group, a plurality of track plate pressing devices are arranged along the center line of the track plate, and the track plate pressing devices include horizontally arranged on the The compression beam on the top surface of the track slab and the screw rods vertically penetrated at both ends of the compression beam, the bottom end of the screw rod penetrates and is fixedly installed on the steel bar on the base plate, and the top end of the screw rod Pass through the compression beam and tighten with nuts; e. Install an expansion joint pressing device and an expansion joint fixing device in the expansion joints between the track slabs of each set of track slabs and the adjacent track slabs, and the expansion joint fixing device and the track slab pressing device The compression beam in the fixed connection; f. Anti-skid devices are provided at both ends of the track plate pressing device; g, a walking trolley is placed between two parallel tracks, the walking direction of the walking trolley is parallel to the center line of the track slab, the mortar tank filled with self-compacting concrete mortar is installed on the walking trolley, The opening at the bottom of the mortar tank is provided with a discharge valve to control the discharge, and a pouring bucket is inserted into the pouring port of one of the track slabs at the end of the track slab group, and a downward slope is set below the discharge valve of the mortar tank. The chute, the discharge end of the chute is set above the pouring hopper, the self-compacting concrete mortar is sent to the pouring hopper above the track plate through the chute, and injected into the pouring hopper formed by the track plate, In the cavity surrounded by the base plate and the grout frame; h. Prepare a spare mortar tank and fill the spare mortar tank with self-compacting concrete mortar. After the mortar tank on the trolley is filled, remove the empty mortar tank and place the spare mortar tank on the trolley. Another tank has been installed The full material is delivered, and the two mortar tanks are used alternately. 7. The construction method of CRTS III slab ballastless track slab self-compacting concrete four-block construction method according to claim 6, characterized in that, in step e, the expansion joint pressing device is vertically arranged on each group of the track In the expansion joint between the track plate of the plate group and the adjacent track plate, it is used to block the expansion joint between the same set of track plates; The expansion joint pressing device includes an expansion joint formwork, an expansion joint adjustment formwork and a fixing frame for fixedly connecting the expansion joint formwork and the expansion joint adjustment formwork, the expansion joint formwork and the expansion joint adjustment formwork are both It is an L-shaped formwork, and the fixed frame is an X-shaped fixed frame; the expansion joint formwork is set opposite to the expansion joint adjustment formwork, and the bottom of one side of the expansion joint adjustment formwork is arranged on the corresponding side of the plate seam. The side of the track plate is attached to the side, the bottom of one side of the expansion joint formwork is attached to the side of the track plate on the other side of the plate seam, and the expansion joint formwork is overlapped on the top of the expansion joint adjustment formwork surface; exhaust pipes are arranged on both the expansion joint formwork and the expansion joint adjustment formwork. 8. The construction method of CRTSⅢ type ballastless track slab self-compacting concrete four-block construction method according to claim 6, characterized in that, in step f, the anti-skid device includes fixedly arranged on both sides of the compression beam The vertical beam at the end, the formwork pressing block fixedly arranged on the formwork opposite to the vertical beam of the longitudinal formwork group, and the bolts for fixedly connecting the vertical beam and the formwork pressing block. 9. The CRTSⅢ type ballastless track slab self-compacting concrete four-block construction method according to claim 6, characterized in that, in step g, the four track slabs of the track slab group are smoothly assembled in order to ensure the self-compacting concrete mortar The lower cavity is poured and filled, and the pouring bucket is inserted into all the pouring openings of the middle two track slabs of the track slab group and the pouring opening of the other end track slab in turn. 10. The CRTSⅢ type ballastless track slab self-compacting concrete four-block construction method according to claim 6, characterized in that, in step g, in the space surrounded by the track slab, the base plate and the grouting frame Pre-wet the bottom surface of the track slab before pouring the self-compacting concrete mortar in the cavity. The operation method is to insert the atomizing nozzle into all the prefabricated holes of each track slab, and turn the atomizing nozzle 360° after opening the atomizing nozzle So that the bottom surface of the track slab is wet without water accumulation.