CN103669219A - Simultaneous slip-form construction device of multi-limb high pier - Google Patents

Abstract

The invention belongs to the technical field of sliding form construction of high piers, and in particular relates to a simultaneous sliding form construction device for multi-leg thin-walled hollow high piers, which solves the problem of long construction period and long construction period when the traditional sliding form construction technology is used in the construction of multi-leg high piers. High cost, difficult construction quality and safety control. It includes a sliding form part, a lifting part and a material transportation part, and the sliding form part includes panels of multi-leg high piers and trusses of a symmetrical structure connecting these panels as a whole. Beneficial effects of the present invention: avoid the disadvantages of uneven load in the slipform construction process; form multiple construction working faces, which can be alternately carried out, reducing the waiting time for concrete pouring; speeding up the construction progress and reducing the number of cranes or concrete pumps The investment saves construction costs; reduces the impact of adverse weather on construction, ensures construction quality and continuity of slipform construction; improves construction efficiency and shortens 1/2 or more of the overall construction period.

Description

Simultaneous sliding construction device for multi-leg high pier

technical field

The invention belongs to the technical field of sliding form construction of high piers, and in particular relates to a simultaneous sliding form construction device for multi-leg thin-walled hollow high piers.

Background technique

Slip form is a method of constructing high-rise concrete buildings. The known slip form device is composed of several formwork, support frame and jacking or lifting system. Sliding is generated and the concrete is continuously built as the formwork is lifted to achieve an increase in the height of the concrete structure.

As expressway construction increasingly enters mountainous areas, many new and simpler pier structures are used in the construction field, and higher pier heights frequently appear. In the process of high pier construction, it is more and more difficult to arrange the construction site in the early stage, construction technology, cost control and performance of the construction period. The original high pier construction method uses more turning formwork and hydraulic climbing formwork construction, and the construction work is carried out for a single pier column. The construction period is long, the construction cost is relatively high, and it is difficult to control the construction quality and safety of the high pier. big.

Contents of the invention

In order to solve the problems that the traditional sliding form construction technology is used in the construction of multi-leg high piers, there are problems such as long construction period, high cost, difficult construction quality and safety control, and provides a multi-leg thin-walled hollow high pier sliding form at the same time Construction device and its construction method.

The present invention adopts following technical scheme to realize:

A co-sliding construction device for a multi-leg hollow high pier includes a sliding form part, a lifting part and a material transportation part. The sliding form part includes a panel of a multi-leg high pier and a symmetrically structured truss connecting these panels into one.

The material transportation part includes a gantry frame corresponding to the center of the high pier of each limb, the bottom of the two columns of the gantry frame is installed on the top of the truss, pulleys I are respectively provided at both ends of the beam of the gantry frame, and steel wire ropes I are threaded on the two pulleys I. , one end of the wire rope I is connected with a hopper, and the other end of the wire rope I is connected with a winch.

The end of the gantry suspension with the hopper is provided with a horizontal beam pulley block, which includes a pole beam, which is perpendicular to the beam of the gantry frame, and pulleys II are respectively installed at both ends of the pole beam. One end is fixedly connected to the ground, and the other end of the steel wire rope II is connected to the counterweight end through two-stage fixed pulleys. There are guide rings on both sides of the hopper, and the steel wire rope II is passed through the guide rings on both sides of the hopper. The truss part where the running track of the hopper passes Set the hopper via.

The lifting part includes several climbing poles arranged symmetrically with respect to the center of the pier column in the structure range of the high pier pier. The top of the truss is provided with a lifting frame corresponding to the climbing pole. The climbing rod is also provided with a movable and fixed limit ring located on the jack.

The top of the truss is an upper operating platform, the bottom of the truss is connected with a hanger, the hanger is provided with a lower operating platform, and the surrounding sides of the upper operating platform and the lower operating platform are respectively provided with guardrails.

The top of the gantry frame is also provided with a tripod, and the tripod is provided with a rain shelter.

The invention has the following beneficial effects: the multi-leg co-sliding working platform facilitates the temporary stacking of materials and the uniform distribution of the top load, and avoids the disadvantages of uneven load during the sliding formwork construction process; multiple construction working surfaces can be formed, and operations can be carried out alternately, reducing The waiting time for concrete pouring is shortened; the gantry is used to lift concrete and other materials through the fast winch, and the tower crane only lifts the steel bars, and the construction machinery is divided into labor, which speeds up the construction progress, reduces the investment of cranes or concrete pumps, and saves construction costs. ;The top of the gantry frame is equipped with a rain shelter and sunshade, which reduces the impact of adverse weather on the construction, ensures the construction quality and the continuity of the slipform construction; multi-leg high piers are constructed at the same time, which improves the construction efficiency and shortens the overall construction period. 1/2 or even more.

Description of drawings

Fig. 1 is an embodiment of the present invention: a schematic plan view of a sliding formwork body with high pier with both limbs;

Fig. 2 is another embodiment of the present invention: a schematic plan view of the sliding formwork with high pier for limbs;

Fig. 3 is a structural representation of the present invention;

Fig. 4 is a structural schematic diagram of the material transportation part of the present invention;

Fig. 5 is a structural schematic diagram of the lifting device for sheltering from the rain and the awning;

In the figure: 1-truss, 2-panel, 3-lifting frame, 4-jack, 5-guard rail, 6-gantry, 7-hanger, 8-upper operation platform, 9-lower operation platform, 10-pier Column, 11-hoist, 12-pulley I, 13-wire rope I, 14-hopper, 15-pulley II, 16-shoulder beam, 17-wire rope II, 18-guide ring, 19-support frame I, 20-counterweight End, 21-tripod, 22-gantry beam, 23-climbing pole.

Detailed ways

The specific embodiments of the present invention will be further described in conjunction with the accompanying drawings.

1. The multi-leg hollow high pier co-sliding construction device includes the sliding form part, the operating platform, the lifting part and the material transportation part. The sliding form part includes the panel 2 of the multi-leg high pier and the symmetrical structure connecting these panels 2 into one truss. The lifting part includes a lifting frame; the material transportation part includes a gantry. The lifting part is lifted upwards, the lifting part drives the truss, and the truss drives each panel to move upwards as a whole, and the entire operation platform slides upwards together, forming a multi-legged hollow high pier that slides together.

Two, the construction structure of the sliding form body of the present invention is as follows:

1. Truss

The truss is used to support and strengthen the formwork to form a support system for the overall flat work platform, which is a symmetrical structure. Connect the various panels of the multi-legged pier as a whole. For detailed force checking and calculation, L100×10mm angle steel is selected as the main reinforcement of the truss beam, L63×6mm angle steel is used for the main rib, and L50×5mm angle steel is used for the diagonal rib, forming a truss system with firm structure and light weight. The connection between the truss girders is mainly welded, and some are bolted, which is convenient for removal when there is a tie beam structure during the sliding process.

2. Panel

The panel is a forming mold, and its own rigidity and surface smoothness directly affect the forming and appearance quality of the demoulding concrete. The panel is made of steel plate with a thickness of δ6mm; according to the climate characteristics, in order to prevent the impact of strong wind load on the formwork during the sliding formwork construction, the height of the panel is 1.26m; The taper, the difference between the upper and lower mouth is 2mm.

3. Lifting part

The lifting part includes a number of climbing rods 23 arranged symmetrically with respect to the center of the pier column 10 in the structural range of the high pier pier column 10. The top of the truss 1 is provided with a lifting frame 3 corresponding to the climbing rod 23. The lifting frame 3 is equipped with a Through the heart type jack 4, the climbing rod 23 is also provided with a stop ring that is positioned on the jack 4 and can move and also be fixed.

The lifting frame is the connecting member between the sliding formwork body and the concrete. It is used to support the formwork body, truss, and working platform to avoid deformation. It is supported on the climbing pole by the jack installed on its beam. The entire sliding load will be lifted The frame is passed to the climbing pole, and the "F" type lifting frame is adopted according to the construction experience. The main beam and the longitudinal beam are made of [18a channel steel, the jack base (and the horizontal beam of the lifting frame) are 12mm thick steel plates, and the reinforcement plates are 8mm steel plates The climbing rod is made of φ48*3.5mm steel pipe, and the connection of the climbing rod is welded. After the steel pipe is welded at the joint, it is polished with a grinder to make the surface of the steel pipe smooth, so that the jack can pass through smoothly, and the welding place should be full. There must be no paint and rust on the surface of the climbing pole. The layout of the lifting frame should be uniform and symmetrical to ensure that the load can be evenly transmitted to each jack and the overall truss to form an overall force-bearing structural system. A limit ring is arranged on the climbing pole, and the limit ring is located above the jack. The limit ring is fixed on the climbing pole through a positioning piece. After the jack is in place, the limit ring is removed, moved upward, fixed again, and repeated.

4. Material transportation part

The material transportation part includes a gantry 6 set corresponding to the center of each high pier. The gantry is usually set at the center of the pier column (force balance), and its size corresponds to the geometric size of the pier column. The bottom of the two columns of the gantry frame 6 is installed on the top of the truss 1. The two ends of the beam of the gantry frame are respectively provided with pulleys I12, and the two pulleys I are provided with wire ropes I13. One end of the wire rope I13 is connected to the hopper 14, and the other end of the wire rope I13 is connected to a hoist. 11. A hopper hole is provided at the truss 1 where the running track of the hopper 14 passes. One end of the gantry 6 suspended with the hopper 14 is provided with a horizontal beam pulley block, and the horizontal beam pulley block includes a shoulder pole beam 16, which is perpendicular to the gantry beam 22, and the two ends of the shoulder pole beam 16 are respectively provided with pulleys II15, and the two pulleys II go up respectively There is a steel wire rope II17, one end of the steel wire rope II17 is fixedly connected to the ground, the other end of the steel wire rope II17 is connected to the counterweight end 20 through two-stage fixed pulleys, guide rings 18 are provided on both sides of the hopper 14, and the steel wire rope II17 is passed through the guide rings on both sides of the hopper within 18.

It is used for the transportation of concrete and other small materials during the construction process, and provides vertical transportation channels. The hoist and pulley block are used to lift the hopper up and down, and the concrete enters the hopper and the sliding form body through a simple flow trough. In order to reduce unsafe factors such as shaking during the rapid lifting of the hopper, a horizontal beam pulley block is set at one end of the gantry, and the steel wire rope II below One end is fixed on the ground, and the other end is set as a pulley. The upper and lower troughs of the hopper are formed through the counterweight end. Guide rings are set on both sides of the hopper to ensure that the hopper does not swing greatly when it is lifted. The steel wire rope II is provided with redundant steel wire ropes at the counterweight end, and the steel wire rope is retracted (mainly released) through the fixed rope clamp at the counterweight end. When the personnel release the rope clamp, the counterweight end can be placed on the ground to complete the extension of the wire rope once. After use, after loosening the fixed end, one end is rolled up, and the other end is hung down with a thin rope to prevent the steel wire rope from falling suddenly due to gravity. , to complete the retraction of the wire rope.

When the sliding form body slides upwards, the entire gantry slides upwards, and the counterweight end rises upward together. When it is raised to about 1m above the ground, the counterweight end is lowered to realize repeated lifting and ensure the vertical steel wire in the guide ring is smooth. straight;

A tripod is set at both ends of the gantry frame, and a shed cloth is set on it to play the effect of sheltering from the rain and the sun. The two ends of the shed cloth are tied with strings, and manual pulling and fixing can realize the retractable effect of the shed cloth, and the operation is simple.

5. Operating platform

The top of the truss 1 is an upper operating platform 8, the bottom of the truss 1 is connected with a hanger 7, the hanger 7 is provided with a lower operating platform 9, and the upper operating platform 8 and the lower operating platform 9 are provided with guardrails 5 respectively. The upper and lower parts of the operating platform are used to stack construction materials and provide a working platform for operators, while ensuring the uniform distribution of the load of the sliding formwork device and preventing formwork deviation. Materials are stacked in the middle of the structure, and the number of personnel is basically fixed around the perimeter. At the same time, the multi-leg structure can form a stable support system compared with the single-leg structure itself.

6. Hydraulic system

The hydraulic system consists of hydraulic jacks, hydraulic consoles, oil circuits and support rods. The model of the hydraulic jack is: 100-type wedge-type jack, and a needle valve is installed on each jack to control the oil inlet; the hydraulic console adopts the automatic control YYKZT36 model. Air, pressurize to 12Mpa, hold the pressure for 5 minutes each time, repeat 3 times, there is no leakage at each seal, conduct a comprehensive inspection, and insert the support rod after all parts work normally; the oil pipe is composed of high-pressure seamless steel pipe, in order To keep the oil supply of each jack uniform, it is convenient to adjust the lift difference of the jack, and adopt the three-stage parallel connection method. That is: from the hydraulic console through the main oil pipe to the oil distributor is the first level, from the oil distributor through the oil distributor to the branch oil distributor is the second level, and from the branch oil distributor through the branch oil pipe (hose) to the jack is the third level. The length of the pipelines from the hydraulic control console to each oil distributor and from the branch and branch oil pipes to each jack should be designed to be the same as possible.

3. The construction method of multi-leg high pier, the steps are as follows:

1) Design and manufacture of sliding formwork;

1.1) The design of the sliding form device, through the analysis and calculation of the sliding form load, especially the uneven load, anti-tilt, wind resistance and other aspects in the process of the sliding form device, taking into account the influence of various adverse weather and surrounding environment during the construction period, A reasonable hydraulic system and bearing capacity of support rods are selected, and after careful analysis and calculation, a formwork structure system with multiple limbs sliding together is formed.

1.2) The materials used in the whole device are common materials in the construction market, with low cost and easy purchase and on-site processing. The angle steel is welded into a truss type, the concrete panel is made of a steel plate with a thickness of 6mm, and the steel plate and the truss are welded into a whole. At the same time as the truss installation is completed, the panel installation is completed, and the hydraulic device, scaffolding board and protective railing are installed.

2), the installation of the gantry;

In the construction of high piers, the effective transportation of concrete has become an important index to speed up the construction process. The simple gantry frame and the fast winch are used to form a safe and efficient concrete conveying device, and some other simple materials can be transported at the same time. At the same time, there are rain shelters and sunshades, which reduce the impact of adverse weather on the construction, and ensure the construction quality and the continuity of the sliding form construction.

3) The phantom slides upward;

After passing the sliding form physical inspection, the concrete pouring construction will be carried out. When the concrete strength of the bottom 30cm reaches 0.2Mpa-0.4Mpa, and the surface and corners of the formwork can not be damaged due to the sliding of the formwork, the formwork will start to slide up. After sliding up 30-50cm, measure and correct the entire sliding form device to ensure the plane position and elevation accuracy of the formwork; carry out the extension of steel bars and stiff skeletons and continuous pouring of concrete until the top of the pier. If there is a horizontal tie beam, the panel and truss at the end of the tie beam can be removed as a whole, and the rest of the formwork can be slid up until the bottom of the panel is parallel to the top of the tie beam. Slide up to the top of another tie beam or pier.

4), the removal of the phantom;

When the formwork slides up to the position of the empty warehouse, the tower crane is used to dismantle it block by block. During the dismantling process, the unremoved part is temporarily fixed on the pier top with pre-embedded steel bars by steel ropes. Removal sequence: ⑴Remove the hydraulic oil circuit system; ⑵Remove the inner formwork and its support system; ⑶Remove the outer steel ring of the outer railing of the operation platform; ⑷Remove the lifting frame and cut off the support rod.

Claims (6)

1. A simultaneous sliding construction device for multi-leg hollow high pier, comprising a sliding form part, a lifting part and a material transportation part, characterized in that the sliding form part includes panels (2) of multi-leg high pier and these panels ( 2) The trusses (1) of a symmetrical structure connected as one. 2. The co-sliding construction device for multi-legged hollow high piers according to claim 1, characterized in that the material transportation part includes a gantry (6) corresponding to the center of each limb high pier, and two columns of the gantry (6) The bottom is installed on the top of the truss (1). Pulleys I (12) are provided at both ends of the crossbeam of the gantry, and a steel wire rope I (13) is threaded on the two pulleys I. One end of the steel wire rope I (13) is connected to a hopper (14). , the other end of the wire rope I (13) is connected with a hoist (11), and the truss (1) where the running track of the hopper (14) passes is provided with a hopper through hole. 3. The simultaneous-sliding construction device for multi-leg hollow high pier according to claim 2, characterized in that: one end of the gantry (6) suspended from the hopper (14) is provided with a horizontal beam pulley block, and the horizontal beam pulley block includes a pole beam (16 ), the shoulder pole beam (16) is perpendicular to the gantry beam (22), the two ends of the shoulder pole beam (16) are respectively provided with pulleys II (15), and the two pulleys II are respectively provided with steel wire rope II (17), steel wire rope II (17 ) one end is fixedly connected to the ground, the other end of the wire rope II (17) is connected to the counterweight end (20) through two-stage fixed pulleys, guide rings (18) are provided on both sides of the hopper (14), and the wire rope II (17) is threaded on Inside the guide rings (18) on both sides of the hopper. 4. The multi-leg hollow high pier co-sliding construction device according to claim 1, 2 or 3, characterized in that: the lifting part includes high pier columns (10) and the structural range is symmetrical with respect to the center of the pier columns (10) A number of climbing poles (23) are set, and the top of the truss (1) is provided with a lifting frame (3) corresponding to the climbing pole (23), and a through-hole jack (4) that can be placed on the climbing pole is installed on the lifting frame (3) , the climbing rod (23) is also provided with a movable and fixed stop ring located on the jack (4). 5. The co-sliding construction device for multi-leg hollow high pier according to claim 4, characterized in that: the top of the truss (1) is an upper operating platform (8), and the bottom of the truss (1) is connected with a hanger (7). The frame (7) is provided with a lower operating platform (9), and the surrounding sides of the upper operating platform (8) and the lower operating platform (9) are respectively provided with guardrails (5). 6. The simultaneous sliding construction device for multi-leg hollow high pier according to claim 5, characterized in that: the top of the gantry (6) is also provided with a tripod (21), and the tripod (21) is provided with a cover canopy.

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