CN110410109A - A kind of construction of hangar tunnel lining cutting arch shifting formwork trolley and construction method - Google Patents

Abstract

The invention relates to a mold-moving trolley for the construction of a shed-hole lining arch and a construction method. The mold-moving trolley for the construction of the shed-hole lining arch includes a pouring formwork, a supporting truss, a mobile flat car and a track assembly, and the pouring formwork is fixedly connected to the The working surface of the support truss, the support truss is installed on the mobile flat car; in the running state, the mobile flat car walks along the track assembly fixedly installed on the ground, and the mobile flat car is installed between the mobile flat car and the ground during formwork and concrete pouring. The jack is connected to the hydraulic station through the hydraulic pipeline, and a support seat is set between the mobile flat car and the ground. The present invention can integrally install, disassemble, and integrally lift the formwork of the semi-arch-column-type shed tunnel lining arch, which can not only save repeated formwork assembly and disassembly work, but also greatly save the cumbersome process of building scaffold protection. Moreover, the formwork can be transferred to the next construction section as a whole, saving the process of dismantling and reinstalling, greatly improving the construction efficiency and shortening the construction period; it has the characteristics of high construction safety factor, fast and convenient, and standardized.

Description

Formwork moving trolley and construction method for construction of shed tunnel lining arch

technical field

The invention relates to the technical field of building construction, in particular to a mold-moving trolley and a construction method for construction of a shed tunnel lining arch, which are suitable for concrete construction of a shed tunnel lining arch.

Background technique

In recent years, my country's highway infrastructure has developed rapidly, a large number of highways are under construction or planned to be constructed, and high-grade highways have been promoted from plain areas to mountainous areas on a large scale. In highway construction, more and more road sections will be dug deep. In these road sections, for some areas with unstable slopes and steep slopes, general slope protection is difficult to achieve economical and long-term protection effects. It also has the advantages of simple construction technology, simple structure, and short construction period. Therefore, semi-arch column sheds with relatively stable structures will appear more and more in highway design. This also puts forward new requirements for the progress of the construction. How to achieve high efficiency, economy and safety in the construction of the shed tunnel lining arch is a new problem for engineers and technicians.

At present, the construction of the arch part of the semi-arch column type shed is mostly assisted by hoisting equipment. Steel pipe supports and formwork are installed section by section, wall concrete is poured, and then steel pipe support and formwork are removed section by section. After the formwork is cleaned, the next stage of construction is installed. This construction method operator labor intensity is big, and construction efficiency is very low, and progress is slow. In order to meet the requirements of construction progress and construction period objectives, it is often necessary to increase the number of formwork, increase the number of operators and operating points to achieve it, which greatly increases the amount of brackets and formwork, and greatly increases the construction cost. Moreover, the formwork has been repeatedly installed and disassembled piece by piece, the formwork is easily deformed, the deformation is large, and the joints of the plates are gradually deformed, so that the surface of the wall of the shed cave lining arch after pouring will be uneven after the formwork is removed, and the joints will leak. Cellular voids, resulting in poor appearance. Moreover, even if the honeycomb cavity is treated twice, the waterproof ability and structural durability of the shed cavity lining arch at this position will be greatly weakened. Moreover, the integrity of the steel pipe support structure is poor, and the bearing capacity is limited. When used in a heavy-loaded structure, the construction safety risk is high and it is difficult to control.

Contents of the invention

The object of the present invention is to provide a mold-moving trolley and construction method for the construction of the shed tunnel lining arch; it fills the gap in the construction of the shed tunnel lining arch, can realize standardized construction, has a light structure, is convenient to assemble and dismantle, and is convenient for construction. Reduce the use of other machinery, easy turnover, shorten the construction period, reduce construction costs, the overall structure is stable, and the construction safety is good.

In order to realize above-mentioned object of the present invention, the technical scheme that adopts is:

A mold-moving trolley for the construction of a shed hole lining arch. The shed hole includes an upper shed hole lining arch. The lower part of the shed hole lining arch is connected to the shed hole lining straight wall. The foundation of the tunnel is located below the ground. The formwork trolley used for the construction of the arch of the shed tunnel lining includes pouring formwork, supporting trusses, mobile flat cars and track components. The supporting trusses are formed by welding channel steel or I-beams of different lengths. On the beam of the flat car. The pouring formwork is fixedly connected to the working surface of the support truss, and the support truss is installed on the mobile flat car; in the running state, the mobile flat car walks along the track assembly fixedly installed on the ground, and when the formwork is installed and the concrete is poured, the mobile flat car A jack is installed between the ground and the jack, which is connected to the hydraulic station through a hydraulic pipeline, and a support seat is set between the mobile flat car and the ground.

That is to say, when the mold-moving trolley for the construction of the lining arch of the shed hole is in the walking state, the trolley can walk freely back and forth on the track assembly. When it reaches the predetermined position, the trolley stops, and several jacks are placed under the trolley. The jack and the hydraulic station Connected, open the hydraulic station, the jack lifts the whole trolley to a predetermined height, and then install the support seat to fix the trolley at the construction height, the hydraulic station can relieve pressure, the weight of the trolley is supported by the support seat, and the workers carry out molding, concrete Pouring operation; when the construction is completed, the hydraulic station is turned on, the jack lifts the trolley, removes the support seat, and then the jack lowers the trolley until the traveling wheels fall into the track, removes the jack, and the trolley can continue to walk to the next working position , and so on.

The supporting seat is one of wedge block, sand box or lifting support. Due to the needs of the terrain, the ground below the shed is often not level. Therefore, the height-adjustable support base A can be used to adjust the height of each support base individually according to the angle of ground inclination, so that the mobile flat car above the support base can be kept horizontal. attitude. The sand cylinder is in the shape of a cylinder, the steel pipe is welded into a closed container as the fixed end at the bottom, an opening with a switch is set at the bottom or side of the fixed end, fine sand is poured into the container, and a movable end with a slightly smaller outer diameter is placed on the fine sand , when the opening is opened and the fine sand flows out, the height of the active end will drop.

The track assembly includes two tracks arranged side by side, a rear cross-link and a front cross-link; the front and rear cross-links are respectively installed at the front and rear ends of the track, and the front and rear cross-links make the parallelism of the two rows of tracks obtain Fixed control, the two rows of rails will not have relative displacement and deviation, improve the stability of the trolley, and ensure the construction accuracy of the shed tunnel lining arch.

The mobile flat car includes a flat car beam, a flat car longitudinal beam and a running member; several flat car beams and flat car longitudinal beams are overlapped to form a mobile flat car platform, and the traveling wheels are installed at the bottom of the mobile flat car platform. Usually, the crossbeam is located above the longitudinal beam, and the traveling wheels are connected under the longitudinal beam.

A motor is installed on the mobile flat car, and the motor is connected with the traveling wheels through a speed reduction device. The motor provides power for the running of the traveling wheels, and the motor is connected to an external power supply through wires.

The supporting truss is formed as a whole by welding channel steel or I-beam with different lengths, and installed on the mobile flat car.

The pouring formwork includes arc mold A on the upper part and arc mold B on the lower part, the arc mold A and the arc mold B are hinged through door shafts, the arc mold A is fixedly connected to the supporting truss, and the arc mold B passes through The upper and lower connecting rods are connected with the mobile flat car; as shown in the attached figure, one end of the upper connecting rod is hinged with the connecting ear of the mobile flat car, and the other end is connected with the upper part of the arc mold B; one end of the lower connecting rod is hinged with the mobile flat car, and the other end It is connected with the lower part of the arc mold B. When the connection between the upper and lower connecting rods and the arc mold B is released, the arc mold B is bent inward through the door shaft to realize the overall decline of the demoulding trolley, so that the overall decline of the formwork bracket is smooth. There is no resistance to prevent the friction of section B of the circular arc mold against the lining side wall of the shed hole, causing damage to the side wall surface.

The mobile flat car is connected with the foundation of the shed hole and the straight wall of the shed hole through several horizontal limit rods, and the horizontal limit rods are one of threaded steel, I-beam, channel steel or angle steel. A hole is reserved when pouring the straight wall lining the shed hole, and the right end of the horizontal limit rod in the horizontal direction is provided with a thread, which passes through the straight wall of the shed hole lining, and the thread at the right end is fastened with a threaded fastener, and the left end of the horizontal limit rod is connected to Flat car beam connection, can be welded, and can also be welded on the flat car beam to open the lug plate and connect through threaded fasteners; when the boron hole foundation is poured, the oblique horizontal limit rod is pre-embedded, and the horizontal limit rod and The trolley is welded and connected; when the trolley moves to a fixed position, the anchoring effect of the horizontal limit rod prevents the displacement of the trolley during formwork installation and concrete pouring; when the horizontal limit rod needs to be removed, the screw thread is removed Firmware, remove the horizontal limit tie rod in the horizontal direction, and cut off the oblique horizontal limit tie rod.

Its construction method includes the following steps:

(1) Processed parts: The mold-moving trolley used for the construction of the shed tunnel lining arch will process the parts according to the drawings, and transport them to the construction site after trial assembly in the processing plant;

(2) Track laying: the surveyors set out to mark the center line of the left and right tracks, and lay the sleepers vertically along the measured line. Lay the track on the sleeper; lay the track along the center line of the sleeper, and connect the track with fishplates and bolts; use channel steel or I-beam as the front and rear cross-links of the track structure at the ends of the two tracks;

(3) Assembling by moving formwork trolley: the support truss is prefabricated in blocks in the factory, and then welded and assembled as a whole after being transported to the site. In the first section, the crane is used to lift it to the track; the pouring formwork is prefabricated in pieces and assembled on site, and two adjacent pouring formworks are spliced with high-strength bolts, and each pouring formwork is welded to the supporting truss; during the formwork installation process Cranes are used to assist in the process, and manual fine-tuning is assisted to ensure the accuracy of the formwork installation; in order to ensure the normal operation of the support formwork during the concrete construction process, it is necessary to debug the trolley after installation. The main debugging content includes walking, stopping, bending of the arc mold B and take-off and landing of the trolley, etc.;

(4) Mold loading: Use the motor to push the trolley forward until it reaches the position marked in advance; during the movement of the trolley, it should be pushed forward smoothly, pay attention to the stability of the trolley, and do not use a large thrust suddenly to prevent support The truss is deformed; after the trolley is moved in place, a jack is installed under each lifting leg; the bottom of the jack is provided with a support pad and the pad is flat to avoid the jack tilting; after the jack is installed and checked for any problems, it starts to lift up; The jacking speed of the jack should be synchronized, and it should be carried out slowly according to the jacking height calculated in advance; the height can be fine-tuned until it reaches the design height; The structure is one of wedge-shaped block, sand barrel, and lifting support; the horizontal limit rod is installed, and the jack is removed after the support seat is installed.

(5) Pouring: The construction personnel wear safety belts to cork the bottom of the pouring formwork on the construction work platform of the formwork. After the caulking is completed, the concrete is poured and vibrated.

(6) Formwork removal: After the poured concrete reaches the required strength, remove the horizontal limit tie rod, and then remove the formwork. When removing the pouring formwork, first use the jack to extend to the bottom of the flat car beam, and then remove the support seat at the bottom of the flat car longitudinal beam , loosen the connecting rod connected to the arc mold B, retract the arc mold B, the jack retracts synchronously and lowers the trolley as a whole until the traveling wheels fall into the track, remove the jack, and the trolley moves forward for the construction of the next section .

(7) Repeat steps (4) to (6) until the entire shed hole is poured.

(8) Dismantle the trolleys in the reverse order of assembly, classify and sort them out, and transport them to the construction site of the next shed or recycle them to the equipment storage yard.

The outstanding substantive features and remarkable progress of the present invention relative to the prior art are:

1. The trolley in the present invention can move as a whole, avoiding the cumbersome construction of dismantling and reassembling the traditional support and formwork after the pouring is completed, it can work in flow, the flow step is relatively fixed, and the flow construction period is controllable; the assembly and disassembly of the trolley is convenient Fast, so that the construction progress can be greatly improved and the construction period can be effectively shortened.

2. The pouring formwork and supporting trusses of the present invention form a stable whole, which can withstand relatively large loads, and is suitable for pouring large quantities of concrete. It has a high safety factor and can effectively ensure construction safety; It is flat, with small traces at the seams, and will not produce defects such as honeycomb holes, which effectively improves the waterproof effect of the shed.

3. In the construction process, the present invention does not require the cooperation of truck cranes or other large locomotives, which can effectively reduce the use of other machinery, significantly reduce the expenditure on machinery costs, and greatly reduce the cost of equipment in construction; various components in the trolley All are easy to purchase, easy to process, and can be recycled and disassembled for use, and easy to turn over. After the construction is completed, it is very convenient and fast to transfer to a new construction site or recycle to the equipment storage yard, without material loss; During the molding process, the use of hydraulic jacks to install and remove the mold does not require too much manpower, which greatly reduces labor intensity and labor costs.

Description of drawings

Fig. 1 is the structural representation of the present invention in dismounting mold state;

Figure 2 is a partial enlarged view of I in Figure 1;

Figure 3 is a partial enlarged view of II in Figure 1;

Fig. 4 is the structural representation of the present invention when walking;

Fig. 5 is the three-dimensional structure schematic diagram of the present invention in dismounting mold state;

The names and serial numbers of the components in the figure are:

Track 1, support seat 2, traveling wheel 3, flat car longitudinal beam 4, motor 5, support pad 6, jack 7, flat car beam 8, support truss 9, arc mold A 10, shed hole lining arch 11, door Shaft 12, arc mold B 13, connecting rod A 14, connecting rod B 15, shed hole lining straight wall 16, horizontal limit pull rod 17, shed hole foundation 18.

Detailed ways

Example 1

A mold-moving trolley for the construction of a shed hole lining arch. The shed hole includes an upper shed hole lining arch portion 11. The lower part of the shed hole lining arch 11 is connected to the shed hole lining straight wall 16. The lower part of the shed hole lining straight wall 16 is connected to the shed. The hole foundation 18 and the shed hole foundation 18 are located below the ground. The mold transfer trolley used for the construction of the shed hole lining arch includes a pouring formwork, a support truss 9, a mobile flat car and a track assembly, and the pouring formwork is fixedly connected to the working surface of the support truss. The truss 9 is installed on the mobile flat car; in the running state, the mobile flat car walks along the track assembly fixedly installed on the ground. When loading the mold and pouring concrete, a jack 7 is installed between the mobile flat car and the ground, and the jack 7 passes The hydraulic pipeline is connected to the hydraulic station, and a sand drum support seat 2 is set between the mobile flat car and the ground;

The track assembly includes two track 1 arranged side by side, a rear cross-link and a front cross-link; the front cross-link and the rear cross-link are installed on the front and rear ends of the track 1 respectively;

The mobile flat car includes a flat car beam 8, a flat car longitudinal beam 4 and a walking member; several flat car beams 8 and flat car longitudinal beams 4 are overlapped to form a mobile flat car platform, and the running wheels 3 are installed at the bottom of the mobile flat car platform;

A motor 5 is installed on the mobile flat car platform, and the motor 5 is connected with the traveling wheels 3 through a reduction gear;

The support truss 9 is formed as a whole by welding channel steels of different lengths and installed on a mobile flat car;

The pouring formwork includes the arc mold A10 at the top and the arc mold B13 at the bottom, the arc mold A10 and the arc mold B13 are hinged through the door shaft 12, the arc mold A10 is fixedly connected with the support truss 9, and the arc mold B13 is connected with support truss 9 through connecting rod 14/15;

The mobile flat car is connected with the shed hole foundation 18 and the shed hole lining straight wall 16 through several horizontal limit pull rods 17, and the horizontal limit pull rods 17 are threaded steel.

The formwork transfer trolley used for the construction of the arch part of the lining of the shed hole, the construction method includes the following steps:

(1) Processed parts: The mold-moving trolley used for the construction of the shed tunnel lining arch will process the parts according to the drawings, and transport them to the construction site after trial assembly in the processing plant;

(2) Track laying: Stake out to mark the center line of the left and right tracks, and lay the sleepers vertically along the measured line. The center of the sleepers is required to match the measurement and lofting; after the sleepers are laid, the track is installed; the trolley travels in the form of double tracks, and the sleepers on each side Lay the track on top; lay the track along the center line of the sleeper; use channel steel or I-beam as the front and rear cross-links of the track structure at the ends of the two tracks;

(3) Assembling by moving formwork trolley: the support truss is prefabricated in blocks in the factory, and then welded and assembled as a whole after being transported to the site. In the first section, the crane is used to lift it to the track; the pouring formwork is prefabricated in pieces and assembled on site, and two adjacent pouring formworks are spliced with high-strength bolts, and each pouring formwork is welded to the supporting truss;

(4) Die loading: Use the motor to push the trolley forward until it reaches the position marked in advance; after the trolley moves in place, install a jack under each lifting leg; set the support pad at the bottom of the jack to make it flat; the jack is installed And check that there is no problem and then start to lift up; until it reaches the design height; determine the number of fulcrums according to the calculation and arrange the support seats symmetrically on both sides of the bottom of the longitudinal beam of the flat car, install the horizontal limit pull rod, and remove the jack after the support seat is installed;

(5) Pouring: The bottom of the pouring formwork is plugged on the construction work platform, and after the plugging is completed, the concrete is poured and vibrated;

(6) Formwork removal: After the poured concrete reaches the required strength, remove the horizontal limit tie rod, and then remove the formwork. When removing the pouring formwork, first use the jack to extend to the bottom of the flat car beam, and then remove the support seat at the bottom of the flat car longitudinal beam , loosen the connecting rod connected to the arc mold B, retract the arc mold B, the jack retracts synchronously and lowers the trolley as a whole until the traveling wheels fall into the track, remove the jack, and the trolley moves forward for the construction of the next section ;

(7) Repeat steps (4) to (6) until the entire shed hole is poured;

(8) Dismantle the formwork trolley in the reverse process of assembly sequence, classify and organize, load and transport to the construction site of the next shed or recycle to the equipment storage yard.

Example 2

The difference from Embodiment 1 is that: the support seat 2 is a wedge; the support truss 9 is formed by I-beams of different lengths through bolt fasteners; the horizontal limit rod 17 is an I-beam.

Example 3

The difference from Embodiment 1 is that the horizontal limit rod 17 is a channel steel.

Example 4

The difference from Embodiment 1 is that the horizontal limit rod 17 is an angle steel.

Claims (9)

1. A mold-moving trolley for the construction of the shed hole lining arch. The shed hole foundation (18) is connected under the hole lining straight wall (16), and the shed hole foundation (18) is located below the ground. , Mobile flat car and track assembly, the pouring formwork is fixedly connected to the working surface of the support truss (9), and the support truss (9) is installed on the mobile flat car; in the walking state, the mobile flat car is fixed along the track assembly fixedly installed on the ground Walking upwards, during mold loading and concrete pouring, a jack (7) is installed between the mobile flat car and the ground, the jack (7) is connected to the hydraulic station through a hydraulic pipeline, and a support seat is set between the mobile flat car and the ground ( 2). 2. The formwork transfer trolley for construction of shed tunnel lining arch according to claim 1, characterized in that: said support seat (2) is a kind of wedge block, sand barrel or lifting support. 3. The mold-moving trolley for construction of shed tunnel lining arch according to claim 1, characterized in that: said rail assembly includes two rails (1) arranged side by side, a rear cross-connection and a front cross-connection; the front cross-connection The cross-link and the rear cross-link are installed on the front and rear ends of the track (1) respectively. 4. The mold-moving trolley for the construction of the shed tunnel lining arch according to claim 1, characterized in that: the mobile flat car includes a flat car beam (8), a flat car longitudinal beam (4) and a walking member; several The flat car beam (8) and the flat car longitudinal beam (4) are overlapped to form a mobile flat car platform, and the traveling wheels (3) are installed at the bottom of the mobile flat car platform. 5. The mold-moving trolley for the construction of the shed tunnel lining arch according to claim 3, characterized in that: the motor (5) is installed on the platform of the mobile flat car, and the motor (5) is connected with the traveling wheels (3 )connect. 6. The mold transfer trolley for the construction of the shed tunnel lining arch according to claim 1, characterized in that: the supporting truss (9) is formed by welding channel steel or I-beam with different lengths, and is installed on On the mobile flat car. 7. The mold-moving trolley for construction of shed tunnel lining arch according to claim 1, characterized in that: said pouring formwork includes an upper arc mold A (10) and a lower arc mold B (13 ), the arc mold A (10) and the arc mold B (13) are hinged through the door shaft (12), the arc mold A (10) is fixedly connected with the support truss, and the arc mold B (13) is connected through the connecting rod (14 /15) connected to the support truss. 8. The mold-moving trolley for the construction of the shed hole lining arch according to claim 1, characterized in that: said mobile flat car passes through several horizontal shed hole foundations (18) and shed hole lining straight walls The limit pull rod (17) is connected, and the horizontal limit pull rod (17) is a kind of threaded steel, I-beam, channel steel or angle steel. 9. The mold-moving trolley for the construction of the shed tunnel lining arch according to claim 1, and its construction method comprises the following steps: (1) Processed parts: The mold-moving trolley used for the construction of the shed tunnel lining arch will process the parts according to the drawings, and transport them to the construction site after trial assembly in the processing plant; (2) Track laying: Stake out to mark the center line of the left and right tracks, and lay the sleepers vertically along the measured line. The center of the sleepers is required to match the measurement and lofting; after the sleepers are laid, the track is installed; the trolley travels in the form of double tracks, and the sleepers on each side Lay the track on top; lay the track along the center line of the sleeper; use channel steel or I-beam as the front and rear cross-links of the track structure at the ends of the two tracks; (3) Assembling by moving formwork trolley: the support truss is prefabricated in blocks in the factory, and then welded and assembled as a whole after being transported to the site. In the first section, the crane is used to lift it to the track; the pouring formwork is prefabricated in pieces and assembled on site, and two adjacent pouring formworks are spliced with high-strength bolts, and each pouring formwork is welded to the supporting truss; (4) Die loading: Use the motor to push the trolley forward until it reaches the position marked in advance; after the trolley moves in place, install a jack under each lifting leg; set the support pad at the bottom of the jack to make it flat; the jack is installed And check that there is no problem and then start to lift up; until it reaches the design height; determine the number of fulcrums according to the calculation and arrange the support seats symmetrically on both sides of the bottom of the longitudinal beam of the flat car, install the horizontal limit pull rod, and remove the jack after the support seat is installed; (5) Pouring: The bottom of the pouring formwork is plugged on the construction work platform, and after the plugging is completed, the concrete is poured and vibrated; (6) Formwork removal: After the poured concrete reaches the required strength, remove the horizontal limit tie rod, and then remove the formwork. When removing the pouring formwork, first use the jack to extend to the bottom of the flat car beam, and then remove the support seat at the bottom of the flat car longitudinal beam , loosen the connecting rod connected to the arc mold B, retract the arc mold B, the jack retracts synchronously and lowers the trolley as a whole until the traveling wheels fall into the track, remove the jack, and the trolley moves forward for the construction of the next section ; (7) Repeat steps (4) to (6) until the entire shed hole is poured; (8) Dismantle the formwork trolley in the reverse process of assembly sequence, classify and organize, load and transport to the construction site of the next shed or recycle to the equipment storage yard.