CN204851287U - Big section moving as a whole formula formwork support - Google Patents

Abstract

The utility model discloses a large-section integral mobile formwork support, which comprises at least one group of door-shaped vehicle frames and scaffolds arranged along the outside of the door-shaped vehicle frame; the door-shaped vehicle frame includes supporting components and transverse steel beams arranged on both sides , each side support assembly includes a bottom beam, several uprights on the bottom beam, channel steel connecting adjacent uprights, and walking wheels under both ends of the bottom beam, and the transverse steel beams are set on top of the corresponding uprights on both sides And it is fixed by oblique support; the scaffolding includes vertical rods arranged in the longitudinal direction and horizontal tubes arranged in the horizontal direction, and the cross connection formed by the vertical rods and the horizontal tubes is provided with supporting steel pipes; The horizontal and vertical sections of the steel hinge and the door frame are tied. The utility model omits the dismantling of the full frame after demoulding and the re-installation of the full frame on the next working face, saves labor, saves construction time, avoids unnecessary material loss, and ensures the construction quality at the same time.

Description

A Large-Section Integral Mobile Formwork Support

technical field

The utility model relates to the field of road and bridge construction machinery, in particular to a large-section integral movable formwork support.

Background technique

In the field of road and bridge construction machinery, the lining section of the civil air defense reconstruction section of some main passage tunnels is a widening section lining relative to the standard section. For example, the lining section of 70 meters is about 4 meters wider than the standard section. At this time, the hydraulic lining trolley of the standard section It cannot be used effectively. If it takes too long to reprocess the custom-made formwork lining trolley, the cost is too high, and the construction of full hall scaffolding will cut off the construction passage and affect the normal operation of the rest of the working face in the cave. Therefore, consider using existing materials and The door-shaped frame is the skeleton and the steel pipe scaffolding is used as the support to form a new support system to meet the construction needs. Compared with the full house scaffolding, the construction is more suitable for the construction needs of the site. However, after the construction of each mold is completed, the steel pipe scaffolding is still expensive to dismantle and re-build. A lot of time and manpower.

Contents of the invention

Purpose of the invention: Aiming at the deficiencies of the prior art, the utility model provides a large-section integral movable formwork support, which has a simple construction process, convenient construction, and improves the safety of the operation process.

Technical solution: The large-section integral mobile formwork support described in the utility model includes at least one set of door-shaped frames and scaffolds arranged along the outside of the door-shaped frames; the door-shaped frames include supporting components arranged on both sides and horizontal steel beams, each side support assembly includes a bottom beam, a number of uprights on the bottom beam, channel steel connecting adjacent uprights, and walking wheels set under both ends of the bottom beam and facing the uprights. The horizontal steel beams are arranged on the tops of the corresponding uprights on both sides and are fixed by oblique supports arranged between the horizontal steel beams and the uprights; The cross connection formed by the horizontal pipes is provided with supporting steel pipes; the scaffold is connected with the door-shaped frame by welding, and tied with the horizontal and vertical sections of the door-shaped frame through steel hinges. Through the above settings, the portal frame and scaffolding form an integral formwork support, which can be moved as a whole along the inner track of the tunnel on the basis of external traction power, meeting the construction requirements of large sections.

To further improve the above scheme, the portal frame and the scaffold are driven to move along the steel rails in the tunnel through the walking assembly, and the walking assembly includes a hand chain hoist and a ground anchor; the ground anchor is in front of the portal frame. It is arranged in a reverse direction of 45° and a depth of 3 meters. The fixed hook of the chain block is connected with the ground anchor, and the suspension hook of the chain block is connected with the portal frame. Chain blocks and ground anchors are used as walking components to provide traction power, which is convenient for construction and operation.

Further, the column is provided with fixed double buckles for fixing the channel steel, and the fixed double buckles are distributed on the top, bottom and/or middle of the column, and one end of the channel steel between adjacent columns passes through the top of the column Or the fixed double buckle at the bottom is fixed, and the other end is fixed by the fixed double buckle in the middle of the column to form an inclined support. The fixing method of the portal frame ensures the stability of the overall movement and the construction process, and improves the safety factor of the construction.

Further, one end of the steel hinge is connected to the end of the transverse steel beam, and the other end extends obliquely upward or downward to connect with the scaffold, and the connection point of the end of the transverse steel beam maintains a horizontal and vertical direction at the same time. interval. The door-type frame and scaffolding are connected by steel hinges, which makes the overall formwork support structure stable, ensuring the construction quality and the stability of the moving process.

In order to meet the requirements of large-section tunnel construction, preferably, two sets of portal frames are used, and the two sets of portal frames are closely arranged along the direction of the tunnel; each side of the horizontal steel beam of the portal frame passes through three sets of The steel hinges are tied to the scaffolding, and each set of steel hinges is two, extending obliquely upward and downward from the same connection point of the transverse steel beam respectively.

Further, the traveling wheel is a rotary single wheel body. The rotating single wheel body is used to facilitate the movement of the overall formwork support.

The door frame has a width of 4500mm and a height of 4700mm, and the distance between adjacent columns on the same side is 1200mm.

Wooden squares are all padded below the vertical poles.

Beneficial effects: Compared with the prior art, the utility model has the advantages: the utility model further improves and optimizes it on the existing basis, so that the integral formwork bracket formed by the combination of the portal bracket and the scaffold can complete the concrete pouring in one mold Afterwards, the overall movement can be realized, which is equivalent to a manually transformed lining trolley; the formwork support system saves the removal of the full-frame frame after demoulding and the re-installation of the full-frame frame on the next working face, saving labor, saving construction time, and avoiding unnecessary Necessary material loss while ensuring construction quality.

Description of drawings

Figure 1 is a front view of the portal frame.

Figure 2 is a side view of the portal frame.

Fig. 3 is the front view of the utility model.

Fig. 4 is a side view of the utility model.

In the figure: 1. Transverse steel beam, 2. Upright column, 3. Diagonal support, 4. Traveling wheel, 5. Channel steel, 6. Supporting channel steel, 7. Fixed double buckle, 8. Bottom beam, 21. Horizontal tube, 22. Pole, 23. Supporting steel pipe, 24. Steel hinge, 25. Wooden block, 26. Chain block, 27. Ground anchor, 31. Steel formwork, 32. Steel arch frame, 33. Existing civil air defense structure.

Detailed ways

The technical scheme of the utility model is described in detail below by means of the accompanying drawings.

Embodiment 1: The large-section integral mobile formwork support provided by the utility model is used for the 70-meter lining section of the civil air defense reconstruction section of the main channel tunnel. The lining section is about 4 meters wider than the standard section, including two sequentially arranged along the tunnel direction A combination of door frame and scaffolding, the width of the door frame is 4500mm, and the height is 4700mm. A group of door-shaped vehicle frames as shown in Figure 1 and Figure 2, including a bottom crossbeam 8 arranged on each side, four columns 2 arranged on the bottom crossbeam, facing the uprights 2 under the two ends of the bottom crossbeam 8 There are walking wheels 4 at the position, and the transverse steel beam 1 is set on the top of the corresponding column 2 on both sides and fixed by the diagonal support 3. The bottom of the horizontal steel beam 1 is connected, the distance between the two inclined supports 3 is 2795mm, and the distance between the adjacent columns 2 on each side is 1200mm; the top of the transverse steel beam 1 is provided with a supporting channel steel 6, and the columns 2 on both sides are provided with fixed double buckles 7, which are fixed The double buckle 7 is distributed on the top, bottom or middle of the column 2, and is used for fixedly connecting the channel steel 5 between the adjacent column 2 on the same side. One end of the channel steel 5 is fixed by the fixed double buckle 7 on the top or bottom of the column 2, and the other end is The fixed double buckle 7 in the middle of the adjacent column 2 is fixed to form an inclined support. As shown in Fig. 3 and Fig. 4, a scaffolding is set outside the portal frame, and the scaffolding includes vertically arranged vertical rods 22 and horizontally arranged horizontal tubes 21, and the distance between adjacent vertical rods 22 and horizontal tubes 21 is 750mm; wooden squares 25 are placed under the vertical pole 22, and the scaffolding is provided with a supporting steel pipe 23 at the cross connection formed by the vertical pole 22 and the horizontal pipe 21 from the centerline of the tunnel to both sides. On the transverse steel beam 1, the connection nodes between the scaffold and the portal frame are all welded, and the horizontal and vertical sections of the entire scaffold and the portal frame are tied by steel hinges 24, and each horizontal steel beam 1 of the portal frame Select three points on the side to install steel hinges 24. One end of the steel hinge 24 is connected to the end of the horizontal steel beam 1, and the other end extends obliquely upward and downward to connect with the scaffolding, and the connection point with the horizontal steel beam 1 maintains both horizontal and vertical The spacing makes the scaffolding and the portal frame form a whole. A 5cm-thick steel formwork 31 is set between the existing civil air defense structure 33 and the steel arch 32 on the outside of the scaffold, and the steel formwork 31 is reinforced by an I-shaped steel back corrugation. Set the ground anchor 27 with a depth greater than 3 meters at a distance of about 20 meters in the direction of travel of the portal frame at a distance of about 45°, and use the chain block 26 as the traction power for the portal frame and scaffolding. The fixed hook of the chain block 26 is connected to the The ground anchor 27 links to each other, and the suspension hook of the chain block 26 links to each other with the door type vehicle frame.

The specific construction process is as follows:

Lay steel rails under the walking wheels of the portal bracket. The rails need to be supported on the sleepers and must be fixed. Pull the portal frame to the lining part. The centerline of the portal frame coincides with the centerline of the tunnel. After it is in place, lock it with a wooden wedge for walking. Wheels, use a hydraulic jack to support the portal frame, pull out the rails so that the portal frame directly falls on the hardened concrete floor, and lock the walking wheels with wooden wedges again; then set up scaffolding, which is welded to the portal frame The overall formwork support is formed and tied by steel hinges, the steel formwork is set up and the steel formwork is reinforced with I-shaped steel back corrugated, and the first concrete pouring construction is carried out after the reinforcement is completed.

The construction process of the first mold concrete pouring is as follows: Concrete pouring is carried out in layers symmetrically from bottom to top through the skylights on both sides of the steel formwork. More than 1m; use steel formwork skylights to tamp manually with tamping rods to ensure that the concrete is compact; pay attention to the pouring situation when capping the roof, to prevent the mold from being forced to pour concrete after filling, which will cause the mold to explode or the support system to be damaged, and to prevent pumping from being in place , is not full, and there is an empty layer; when pouring concrete, it is necessary to check the support of the supporting steel pipes, jacking brackets, and steel formwork at all times. Once there is looseness, displacement, and bending, slow down or stop pouring in time, and replace or strengthen the supporting steel pipes to ensure the quality of the concrete. , The basic structure of the portal frame and the personal safety of the construction personnel.

After the curing strength of the first mold concrete meets the construction requirements, the jacking is unloaded, demoulding and surface cleaning are carried out, and the scaffolding is inspected and maintained. Then use the electric hoist to further tighten the steel hinge to stabilize the entire formwork support, and then use four 30t hydraulic jacks to prop up the entire formwork support, adjust the rails to make them in place, and then gradually lower the jacks. As the traction power of the portal frame, the chain hoist uses the walking track to move the portal frame, and at the same time carries the entire steel pipe frame when the portal frame moves, so that the portal frame and the steel pipe frame serve as an integral support system, and the working surface can be Transfer, you can transfer to the adjacent construction surface to start construction.

In the past, full-wall steel pipe frames were often used for large-section linings. Such full-wall frame construction has many disadvantages: first, a large amount of steel pipe materials (fasteners, jacking) are required; The traffic is inconvenient; the process conversion is complicated and labor-intensive; the one-time concrete pouring cycle is long and the construction period is under pressure; the dense steel pipe frame blocks the road in the construction section, affecting the passage of materials, machinery and vehicles on site.

However, the use of the integral mobile formwork support provided by the utility model has achieved good results: it is not necessary to dismantle the full frame after the construction and then erect the complex process of the full frame, which greatly reduces labor and saves the construction period, and only needs to pour the first mold concrete The implementation of the entire support system and walking device can be completed in time, and the subsequent construction can greatly shorten the single-form concrete pouring time, and the safety of the working surface provided by the portal frame is improved, and the safety of operators and passers-by is guaranteed. It has the advantages of fast construction progress and good overall performance of concrete.

The overall mobile formwork support is used for production to rapidly improve the construction efficiency, shorten the construction period, reduce the construction cost, reduce the labor input, weaken the complex process, and effectively improve the construction efficiency. The length of the formwork support system in this section is 8 meters, and a total of 9 molds of concrete need to be poured for the 70-meter lining construction. In this way, based on the actual measurement and calculation of the first mold concrete pouring, it takes 100 working days to dismantle and re-erect the steel pipe frame in a single cycle by using the conventional portal frame with the scaffold support system. The optimization of the formwork support system saves each construction cycle process The process of dismantling and erecting the steel pipe frame can save 800 man-days for the lining of the entire civil air defense reconstruction section, and at the same time, the construction period is advanced by 80 days, which greatly saves the investment in mechanical equipment and materials, and saves labor costs and rental fees for steel pipe fasteners. In general, it saves labor and time, saves construction period, saves cost, and the quality is guaranteed, and good economic benefits have been achieved.

As stated above, although the invention has been shown and described with reference to certain preferred embodiments, this should not be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A large-section integral mobile formwork support is characterized in that: it includes at least one group of portal frame and scaffolding arranged along the outside of the portal frame; the portal frame includes support assemblies located on both sides and Horizontal steel beams, each side support assembly includes a bottom beam, a number of uprights on the bottom beam, channel steel connecting adjacent uprights, and walking wheels located under both ends of the bottom beam and facing the uprights. The horizontal steel beams are arranged on the top of the corresponding columns on both sides and fixed by the oblique supports arranged between the horizontal steel beams and the columns; The cross connection formed by the pipes is provided with supporting steel pipes; the scaffolding is connected with the door-shaped frame by welding, and tied with the horizontal and vertical sections of the door-shaped frame through steel hinges. 2. The large-section integral movable formwork support according to claim 1, characterized in that: the portal frame and the scaffold are driven to move along the steel rails in the tunnel by a walking assembly, and the walking assembly includes a chain hoist and a Ground anchor; the ground anchor is set in a reverse direction of 45° and a depth of 3 meters in front of the portal frame, the fixed hook of the chain block is connected with the ground anchor, and the chain block The suspension hook is connected with the portal frame. 3. The large-section integral mobile formwork support according to claim 1, characterized in that: the column is provided with fixed double buckles for fixing the channel steel, and the fixed double buckles are distributed on the top and bottom of the column And/or in the middle, one end of the channel steel between adjacent columns is fixed by a fixed double buckle at the top or bottom of the column, and the other end is fixed by a fixed double buckle in the middle of the column to form an inclined support. 4. The large-section integral mobile formwork support according to claim 1, characterized in that: one end of the steel hinge is connected to the end of the transverse steel beam, and the other end extends obliquely upward or downward to the scaffold It is connected with the end connection point of the transverse steel beam while maintaining the transverse and longitudinal intervals. 5. The large-section integral mobile formwork support according to claim 4, characterized in that: it includes two groups of portal frames, and the two groups of portal frames are closely arranged in sequence along the tunnel direction; the portal frame Each side of the transverse steel beam is connected to the scaffold by three sets of steel hinges, each set of two steel hinges extends obliquely upward and downward from the same connection point of the transverse steel beam. 6. The large-section integral mobile formwork support according to claim 1, characterized in that: the traveling wheels are rotary single-wheel bodies. 7. The large-section integral movable formwork support according to claim 1, characterized in that: the width of the portal frame is 4500mm, the height is 4700mm, and the adjacent distance between columns on the same side is 1200mm. 8. The large-section integral movable formwork support according to claim 1, characterized in that: wooden blocks are placed under the vertical poles.