L-shaped steel form trolley for prefabricating wave protection wall

Abstract

The utility model discloses a kind of L-shaped steel mould trolley for wave-preventing wall prefabrication, it is related to water conservancy engineering technical field, including mobile trolley, still including precision water stop mechanism, collaborative vibrating mechanism, the top fixed mounting of mobile trolley has bottom die, two double L-shaped side moulds are oppositely arranged on bottom die along transverse direction, the lower end of two double L-shaped side moulds is hinged with bottom die, the outer side of double L-shaped side mould is hinged with hydraulic cylinder, the other end of hydraulic cylinder is hinged with mobile trolley;Two split end moulds are oppositely arranged on bottom die along longitudinal direction, split end mould is detachably connected with double L-shaped side mould, and sealing structure is equipped at joint, double L-shaped side mould, split end mould and bottom die jointly constitute the wave-preventing wall mould of upper horizontal, lower vertical.This L-shaped steel mould trolley for wave-preventing wall prefabrication, by using inverted prefabrication process, wave-preventing wall horizontal bottom plate is in upper, vertical wallboard is in lower, combined with split end mould and double-layer sealing structure, thoroughly eliminates vibrating blind area and realizes zero slurry leakage.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, specifically to a steel mold trolley for prefabricating L-shaped wave walls. Background Technology

[0002] As a key protective structure in water conservancy projects, the prefabrication of L-shaped wave walls is an important direction for improving efficiency and ensuring quality. However, most existing molds are upright structures, with the horizontal base plate of the wave wall at the bottom and the vertical wall plate at the top. The horizontal base plate of the L-shaped component is blocked by the vertical wall plate above, making it difficult for the immersion vibrator to penetrate vertically into the base plate area. This results in a vibration blind zone in this critical part, and the concrete density cannot be guaranteed, which directly affects the overall strength of the component.

[0003] In existing technologies, such as the patent with publication number CN13645806U, although efforts are made to improve efficiency by adding vibrators, the inherent integral template structure remains unchanged, and the problem of blind spots in the vibration of horizontal base plates cannot be fundamentally solved.

[0004] Therefore, it is necessary to propose a steel mold trolley for prefabricating L-shaped wave walls to solve the above problems. Utility Model Content

[0005] Technical problem to be solved: The purpose of this utility model is to provide a steel mold trolley for prefabrication of L-shaped wave walls, so as to solve the problem mentioned in the background art that most of the existing molds are upright structures, the horizontal bottom plate of the L-shaped component is blocked by the vertical wall plate above, the immersion vibrator is difficult to penetrate vertically into the bottom plate area, resulting in a vibration blind zone in this key part, and the concrete density cannot be guaranteed, which directly affects the overall strength of the component.

[0006] Technical Solution: To achieve the above objectives, this utility model is implemented through the following technical solution: A steel mold trolley for prefabricating an L-shaped wave-breaking wall includes a moving trolley, a precision water-stopping mechanism, and a coordinated vibration mechanism. A bottom mold is fixedly installed on the top of the moving trolley. Two double L-shaped side molds are arranged opposite each other along the transverse direction on the bottom mold. The lower ends of the two double L-shaped side molds are hinged to the bottom mold. A hydraulic cylinder is hinged to the outer side of the double L-shaped side mold, and the other end of the hydraulic cylinder is hinged to the moving trolley. Two separate parts are arranged opposite each other along the longitudinal direction on the bottom mold. The mold consists of a split-type end mold and a double L-shaped side mold that are detachably connected, with a sealing structure at the joint. The double L-shaped side mold, the split-type end mold, and the bottom mold together form a wave-damping wall mold with a horizontal upper part and a vertical lower part. The precision water-stopping mechanism includes a water-stopping groove opened on the inner wall of the double L-shaped side mold, and a limiting member for pressing and fixing the water-stopping plate placed in the water-stopping groove. The collaborative vibration mechanism includes multiple attached vibrators fixedly installed on the outside of the double L-shaped side mold, and the multiple attached vibrators are arranged in multiple layers along the height direction of the side mold.

[0007] Preferably, the sealing structure is a double-layer anti-seepage structure, including a rubber strip set in the reserved groove of the joint and a closed-cell foam strip pasted on the splicing surface of the template.

[0008] Preferably, the water-stop groove is a U-shaped groove; the limiting member is a screw that penetrates the double L-shaped side mold and can abut against the water-stop sheet, and a sealing washer is provided between the screw and the side mold.

[0009] Preferably, the number of attached vibrators in the collaborative vibration system is three sets, which are respectively arranged at heights of 0.40m, 0.85m and 1.7m from the bottom of the mold.

[0010] Preferably, the inner wall of the double L-shaped side mold is welded with vertical stiffening ribs.

[0011] Beneficial effects: Compared with the prior art, this utility model provides a steel mold trolley for prefabricating L-shaped wave walls. This L-shaped steel mold trolley for prefabricating wave walls has a unique structure and is easy to use. By adopting an inverted prefabrication process, the horizontal bottom plate of the wave wall is on top and the vertical wall plate is on the bottom. Combined with the split end mold and double-layer sealing structure, the blind zone of vibration is completely eliminated and the leakage of concrete slurry is prevented. The displacement of the waterstop plate is reduced by the coordinated positioning of the U-shaped waterstop groove and the limiting screw. The layered arrangement of vibrators based on the inverted posture significantly improves the density and strength of the components. The hydraulic demolding component with bottom hinge achieves smooth and non-destructive demolding, which comprehensively improves the prefabrication quality, accuracy and efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a partially enlarged view of the double-layer seepage-proof structure of this utility model; Figure 3 This is a partial enlarged view of the precision water-stopping mechanism of this utility model; Figure 4 This is a diagram of the vibrating device and hydraulic drive system of this utility model.

[0013] In the diagram: 1. Double L-shaped side mold; 2. Split end mold; 3. Bottom mold; 4. Rubber strip; 5. Closed-cell foam strip; 6. Moving trolley; 7. Vertical stiffening rib; 8. U-shaped water-stop groove; 9. Water-stop plate; 10. Limit screw; 11. Sealing washer; 12. M16 bolt; 13. Attached high-frequency vibrator; 14. Hydraulic cylinder. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Example 1: This Example 1 provides a steel mold trolley for prefabricating L-shaped breakwater walls. It is suitable for the mass prefabrication of L-shaped breakwater wall components with dimensions of 2.5m (length) × 2.4m (height) and a weight of approximately 8 tons. It features a unique structure. Please refer to [link / reference]. Figure 1-4 As shown, it includes a mobile trolley 6, double L-shaped side molds 1, split end molds 2, precision water-stopping mechanism 3, collaborative vibration mechanism and bottom mold 3, with the bottom mold 3 fixedly installed on the mobile trolley 6.

[0016] The double L-shaped side mold 1 is welded from 46# manganese steel plate. To ensure the rigidity and stability of the template, vertical stiffening ribs 7 are welded at uniform intervals of 500mm along the height direction on the outer side wall of the double L-shaped side mold 1. The stiffening ribs 7 are made of 50mm (width) × 8mm (thickness) steel strips. The two double L-shaped side molds 1 are set opposite to each other, and their lower ends are hinged to the bottom mold 3.

[0017] The split-type end mold 2 is also made of 8mm thick 46# manganese steel plate, and its shape matches the contour of the component end. The split-type end mold 2 is detachably connected to the end of the double L-shaped side mold 1 by several M16 bolts 12, and the tightening torque of the bolts is uniformly set to 40 N·m. In order to achieve excellent anti-leakage effect, a double-layer anti-leakage structure is set at the joint between the split-type end mold 2 and the double L-shaped side mold 1. Specifically, firstly, an elastic rubber strip 4 is nested in the reserved groove at the joint; secondly, a 10mm thick closed-cell foam strip 5 is pre-attached to the splicing surface of the template. The compression rate of the strip is about 30% after the bolts are tightened, and it ensures continuous and uninterrupted coverage of the entire splicing surface. The synergistic effect of the rubber strip embedding and the foam strip compression sealing fundamentally blocks the leakage path of concrete slurry.

[0018] The precision water-stopping mechanism 3 is used to precisely fix the copper water-stopping plate in the component; a continuous U-shaped water-stopping groove 8 is pre-machined at the center of the inner wall of the double L-shaped side mold 1, with a groove width of 1.5mm and a groove depth of 20mm; during installation, the dimensions are 2.5m × 0.17m × The edge of the 1.2mm thick copper waterstop 9 is precisely inserted into the U-shaped waterstop groove 8. To eliminate the possible displacement of the waterstop under the impact of concrete pouring, a limiting fastening structure is set: that is, an M8 stainless steel limiting screw 10 is used, which penetrates the wall thickness of the double L-shaped side mold 1, and its end directly abuts against the flange of the copper waterstop 9. These limiting screws 10 are evenly arranged at 400mm intervals along the length of the U-shaped waterstop groove 8. To prevent grout leakage through the screw holes and to protect the formwork, a 2mm thick oil-resistant nitrile rubber sealing gasket 11 is set between each limiting screw 10 and the side mold. This structure ensures that the displacement of the waterstop during the pouring process is strictly controlled within 1mm.

[0019] The coordinated vibration mechanism includes three sets of attached high-frequency vibrators 13, each with a power of 1.5kW, which are fixed to the outside of the double L-shaped side mold 1 by bolts; the placement height (distance from the bottom of the mold) of the three sets of vibrators has been precisely calculated: The first group is positioned at a height of 0.40m from the bottom of the mold, corresponding to the "cap" turning area of ​​the L-shaped component, and is responsible for the compaction of this complex stress area.

[0020] The second group is positioned at a height of 0.85m from the bottom of the formwork, corresponding to the middle of the "wall", and is responsible for the compaction of the main concrete.

[0021] The third group is placed at a height of 1.7m from the bottom of the mold, corresponding to the upper part of the "wall", to eliminate the top bubble accumulation area.

[0022] This layered, differentiated layout based on the stress characteristics of the components and the escape path of the air bubbles achieves the systematic elimination of blind spots in vibration compaction.

[0023] The hydraulic demolding assembly 5 is used to achieve non-destructive demolding of the component; the assembly includes two hydraulic cylinders 14 with a thrust of 50kN. The cylinder body of the hydraulic cylinder 14 is fixed to the trolley 6 by a hinge seat, and the end of its piston rod is hinged to the bottom outer side of the double L-shaped side mold 1.

[0024] During demolding, the tie rods are first removed, and then the hydraulic pump station is started to drive the piston rod of the hydraulic cylinder 14 to extend at a constant speed, thereby providing a smooth and uniform pulling force to the side mold, causing it to rotate around the bottom hinge point and open. This process replaces the traditional manual prying and avoids the damage to the corners of the component caused by concentrated stress.

[0025] Working principle: Based on the above-mentioned steel mold trolley, this embodiment also provides a prefabrication method for L-shaped wave wall components, the specific steps of which are as follows: Step 1: Clean the template and evenly apply water-based release agent to the inner surfaces of the double L-shaped side mold 1 and the split end mold 2. Install and calibrate the copper waterstop 9, and tighten the limit screw 10 after ensuring its accurate position.

[0026] Step Two: Use concrete with a design strength of C30 and a frost resistance grade of F150, and control its slump to 140±20mm; adopt a layered pouring method, with the thickness of each layer controlled between 0.4m and 0.6m. For each layer, first use a φ50mm immersion vibrator for preliminary manual leveling and vibration to eliminate blind spots in the foundation such as corners of the formwork and areas with dense reinforcement; then, based on the elevation reached by the concrete liquid level, selectively start the attached high-frequency vibrator 13 placed near that elevation, and control the vibration time to 25-30 seconds; through this coordinated vibration process of "combining immersion and attached vibration" and "selectively starting according to elevation", the uniform compaction of the entire cross section of the component is ensured.

[0027] Step 3: After the pouring is completed, the component is steam cured at a constant temperature of 60±2℃ for 4 hours. After reaching the demolding strength, the M16 bolts 12 of the split end mold 2 are removed manually, the end mold is moved away, and then the hydraulic pump station is operated to drive the hydraulic cylinder 14 at a slow speed controlled by the operator to open the double L-shaped side mold 1 smoothly. During the entire demolding process of "end mold and side mold", the elastic recovery of the rubber strip 4 and closed-cell foam strip 5 at the joint of the template effectively protects the corners of the component from damage.

[0028] By applying the steel mold trolley and method of this embodiment, excellent quality indicators were achieved in the prefabrication of 456 L-shaped wave wall components in the Yuanwan Reservoir project: grout leakage rate of 0%, waterstop plate 9 installation displacement ≤1mm, and demolding damage rate ≤1%. At the same time, the prefabrication period was significantly shortened from 143 days in the traditional process to 77 days, and the efficiency was significantly improved.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel mold trolley for prefabricating an L-shaped wave wall, comprising a moving trolley (6), characterized in that: It also includes a precision water-stopping mechanism and a coordinated vibration mechanism. The top of the moving trolley (6) is fixedly installed with a bottom mold (3). Two double L-shaped side molds (1) are arranged opposite each other along the horizontal direction on the bottom mold (3). The lower ends of the two double L-shaped side molds (1) are hinged to the bottom mold (3). A hydraulic cylinder (14) is hinged to the outer side of the double L-shaped side molds (1). The other end of the hydraulic cylinder (14) is hinged to the moving trolley (6). Two split end molds (2) are arranged opposite each other along the longitudinal direction on the bottom mold (3). The split end molds (2) are detachably connected to the double L-shaped side molds (1). A sealing structure is provided at the joint. The double L-shaped side mold (1), the split end mold (2) and the bottom mold (3) together form a wave-stopping wall mold with a horizontal upper part and a vertical lower part. The precision water-stopping mechanism includes a water-stopping groove (8) opened on the inner wall of the double L-shaped side mold (1) and a limiting member for pressing and fixing the water-stopping piece (9) placed in the water-stopping groove (8). The collaborative vibration mechanism includes multiple attached vibrators (13) fixedly installed on the outside of the double L-shaped side mold (1). The multiple attached vibrators (13) are arranged in multiple layers along the height direction of the side mold.

2. The steel mold trolley for prefabrication of L-shaped wave-breaking walls according to claim 1, characterized in that, The sealing structure is a double-layer anti-seepage structure, including a rubber strip (4) set in the reserved groove of the joint and a closed-cell foam strip (5) pasted on the splicing surface of the template.

3. The steel mold trolley for prefabrication of the L-shaped wave wall according to claim 1, characterized in that, The water-stop groove (8) is a U-shaped groove; the limiting member is a screw that passes through the double L-shaped side mold (1) and can abut against the water-stop sheet (9), and a sealing washer (11) is provided between the screw and the side mold.

4. The steel mold trolley for prefabrication of L-shaped wave-breaking walls according to claim 1, characterized in that, The number of attached vibrators (13) of the collaborative vibration mechanism is three sets, which are respectively arranged at heights of 0.40m, 0.85m and 1.7m from the bottom of the mold.

5. The steel mold trolley for prefabrication of L-shaped wave-breaking walls according to claim 1, characterized in that, The inner wall of the double L-shaped side mold (1) is welded with vertical stiffening ribs (7).

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