Formwork system of cast-in-place continuous slab V-shaped pier rigid frame bridge
By combining the lightweight rigid frame with bamboo ply plate, a formwork system suitable for cast-in-place continuous plate V-pier rigid bridge is designed, which solves the problems of high cost and unrecyclable conventional steel formwork and realizes the economical construction of construction Sex and safety.
Patent Information
- Application Number
- CN202420611317.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-03-27
AI Technical Summary
During the construction process of cast-in-place continuous plate V-pier rigid structure bridge, it is often stipulated that steel formwork is costly, difficult to lift on water, and cannot be recycled and reused, which affects the construction progress and increases costs.
Using a lightweight rigid frame combined with a flexible and high-strength bamboo plywood, a template system is designed, including a V-leg formwork assembly, a bridge deck formwork assembly and a support formwork assembly, through the pull-up assembly and limit positioning The structures such as parts achieve stability and convenient assembly of the template.
This formwork system reduces construction costs, simplifies the water lifting process, ensures the stiffness of the bridge structure and the safety of construction, and the formwork is easy to assemble and recycle, and has a wide application range.
Smart Images
Figure CN222525175U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge construction, and in particular relates to a template system for a cast-in-place continuous slab V-shaped pier rigid frame bridge. Background Art
[0002] The cast-in-place continuous slab V-shaped pier rigid frame bridge has a wide pier column in the transverse direction of the bridge and a large volume. The V-shaped pier column is connected to the abutment and the bridge deck with multiple curved sections and has an inner cavity. Under the above-mentioned peculiar structural conditions, if conventional customized steel formwork is used, the overall assembly cost is high, the water hoisting is difficult, and it cannot be recycled and reused, which not only affects the overall construction progress of the bridge, but also greatly increases the construction cost. Therefore, a new formwork system is needed to be suitable for the construction of cast-in-place continuous slab V-shaped pier rigid frame bridges. Utility Model Content
[0003] In response to the above-mentioned problems in the prior art, the present application proposes a formwork system for a cast-in-place continuous slab V-pier rigid frame bridge, which cleverly uses a lightweight rigid frame combined with flexible and high-strength bamboo plywood, which can not only ensure the structural form of the rigid frame bridge, but also facilitate construction.
[0004] The utility model proposes a formwork system for a cast-in-place continuous slab V-shaped pier rigid frame bridge, comprising: a V-shaped leg formwork assembly, a bridge deck formwork assembly and a formwork frame assembly; the V-shaped leg formwork assembly comprises an outer bamboo plywood, an inner bamboo plywood, an outer rigid frame, an inner frame and a tie assembly; the outer bamboo plywood is laid on the two opposite outer sides of the V-shaped leg of the rigid frame bridge to be constructed, and the curvature of the outer bamboo plywood matches the curvature of the outer side of the V-shaped leg; the inner bamboo plywood is laid on the inner side of the V-shaped leg, and the curvature of the inner bamboo plywood matches the curvature of the inner side of the V-shaped leg. The arc shape matches that of the outer bamboo plywood and the inner bamboo plywood; a spacing is maintained between the outer bamboo plywood and the inner bamboo plywood to form a V-shaped casting cavity for the V-shaped leg to be cast in situ; the curvature of the outer rigid frame matches the curvature of the outer bamboo plywood and is laid on the outer side of the outer bamboo plywood along the transverse direction of the bridge; the inner frame is arranged on the inner side of the inner bamboo plywood; the tie assembly tie the outer rigid frame and the inner frame; the bridge deck formwork assembly is laid under the bridge deck of the rigid frame bridge to be constructed; the formwork frame assembly is supported under the bridge deck formwork assembly.
[0005] Furthermore, the anchoring assembly includes a first pair of anchoring members and a second pair of anchoring members, wherein the first pair of anchoring members anchors the outer rigid frames on two relatively outer sides of the V-shaped leg, and the second pair of anchoring members anchors the outer rigid frames and the inner frames.
[0006] Furthermore, the V-shaped leg formwork assembly also includes square timber, which is laid between the outer bamboo plywood and the outer rigid frame, and the square timber is also laid between the inner bamboo plywood and the inner frame.
[0007] Furthermore, the tie assembly includes a precision-rolled threaded steel bar and steel pipe back ribs arranged at both ends of the precision-rolled threaded steel bar.
[0008] Furthermore, the V-shaped leg formwork assembly also includes a limiting member, which is arranged on the top of the pedestal of the rigid frame bridge, and the bottom of the outer rigid frame is located on the inner side of the limiting member.
[0009] Furthermore, the opposite sides of the outer bamboo plywood and the inner bamboo plywood are respectively provided with release agent layers.
[0010] Furthermore, the bridge deck formwork assembly includes a bridge deck body formwork and a V-leg bridge deck formwork; the bridge deck body formwork is laid under the bridge deck of the rigid frame bridge to be constructed, and its end is connected to the outer bamboo plywood; the V-leg bridge deck formwork is arranged above the V-leg; the V-leg bridge deck formwork and the V-leg enclose a flood discharge outlet.
[0011] Furthermore, PVC pipes are provided at both ends of the V-shaped leg bridge deck formwork in the longitudinal direction of the bridge, and the length direction of the PVC pipes is arranged along the transverse direction of the bridge.
[0012] Further, the formwork support assembly includes a V-shaped leg formwork support structure and a bridge deck formwork support structure;
[0013] The V-shaped leg formwork support structure is supported between the V-shaped leg bridge deck formwork and the V-shaped leg;
[0014] The bridge deck formwork structure is supported below the bridge deck body formwork.
[0015] Furthermore, the bridge deck formwork structure includes: steel pipe pile columns, I-beam skeletons and buckle brackets; the I-beam skeleton is arranged at the upper end of the steel pipe pile columns, the buckle bracket is arranged at the upper end of the I-beam skeleton, and the buckle bracket is supported below the bridge deck body template.
[0016] The beneficial effects of the utility model are: the lightweight outer rigid skeleton is cleverly used, combined with the outer bamboo plywood and inner bamboo plywood with good flexibility and high strength, which perfectly solves a series of problems such as high cost, difficulty in water hoisting, and non-recyclability of the V-shaped legs of the V-shaped pier rigid frame bridge constructed by the traditional steel formwork overall customization method. The V-shaped leg formwork assembly of the utility model not only ensures the rigidity of the assembly, but also ensures the safety of water operations, is simple and easy to assemble, has good practicality, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model is a structural schematic diagram of the formwork system of the cast-in-place continuous slab V-shaped pier rigid frame bridge after the rigid frame bridge construction is completed.
[0018] Figure 2 The utility model is a schematic diagram of the assembly process of the V-shaped leg template assembly used for constructing the V-shaped leg.
[0019] Figure 3 It is a partially enlarged schematic diagram of the V-leg formwork assembly and the bridge deck formwork frame structure of the utility model.
[0020] Figure 4 for Figure 3 Side view structural diagram of the middle V-leg formwork assembly.
[0021] Figure 5 for Figure 3 A partial enlarged schematic diagram of the middle tie assembly.
[0022] Figure 6 for Figure 3 Schematic diagram of the structure after the middle V-shaped leg is completed.
[0023] In the figure, 1-outer rigid frame; 21-outer bamboo plywood; 22-inner bamboo plywood; 3-square wood; 4-first tension member; 5-second tension member; 6-limiting member; 7-inner frame; 8-disc bracket; 9-I-beam longitudinal beam; 10-double-piece I-beam transverse beam; 11-steel pipe pile column; 12-V-leg bridge deck formwork; 13-mountain-shaped clip; 14-PVC pipe; 15-V-leg; 16-bridge deck body formwork. DETAILED DESCRIPTION
[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] like Figure 1-Figure 6 The formwork system of the cast-in-place continuous slab V-shaped pier rigid frame bridge shown includes: a V-shaped leg formwork assembly, a bridge deck formwork assembly and a formwork frame assembly.
[0026] like Figure 3As shown, the V-leg formwork assembly includes an outer bamboo plywood 21, an inner bamboo plywood 22, an outer rigid frame 1, an inner frame 7 and an anchor assembly; the outer bamboo plywood 21 is laid on the two opposite outer sides of the V-leg of the rigid frame bridge to be constructed, and the curvature of the outer bamboo plywood 21 matches the arc of the outer side of the V-leg 15; the inner bamboo plywood 22 is laid on the inner side of the V-leg 15, and the curvature of the inner bamboo plywood 22 matches the arc of the inner side of the V-leg 15; a spacing is maintained between the outer bamboo plywood 21 and the inner bamboo plywood 22 to form a V-shaped casting cavity for the V-leg to be cast in situ; the curvature of the outer rigid frame 1 matches the curvature of the outer bamboo plywood 21, and is laid on the outer side of the outer bamboo plywood 21 along the transverse direction of the bridge; the inner frame 7 is arranged on the inner side of the inner bamboo plywood 22; the anchor assembly anchors the outer rigid frame 1 and the inner frame 7. The tensioning assembly includes a first pair of tension members 4 and a second pair of tension members 5 . The first pair of tension members 4 tie together the outer rigid frames 1 on the two opposite outer sides of the V-shaped legs 15 , and the second pair of tension members 5 tie together the outer rigid frames 1 and the inner frames 7 .
[0027] In this embodiment, the outer bamboo plywood 21 and the inner bamboo plywood 22 are only arranged at different positions, and both are made of bamboo plywood. The inner frame 7 can be made of square tubes or rigid frames.
[0028] The V-shaped leg template assembly also includes a stopper 6, which is arranged at the top of the cap of the rigid frame bridge, and the bottom of the outer rigid frame 1 is located inside the stopper 6. In this embodiment, the stopper 6 is a channel steel stopper. The channel steel stopper is at the top of the cap.
[0029] The outer rigid frame 1 is customized according to the design size of the pier, can fit the shape of the pier, and can adopt slender steel components that are flexibly circulated manually; the outer rigid frame 1 in this embodiment is used as the main rib, and its bottom is fixed with a pre-buried channel steel block.
[0030] In this embodiment, bamboo plywood is a building material that uses bamboo as the main structure and filling material and is formed into blanks by high pressure; in this embodiment, it is used as a template and has excellent plasticity and flexibility. It can deform after being stressed so that its shape fits the inner and outer sides of the V-shaped leg to be constructed; it has the characteristics of strong plasticity, good flexibility, high strength, and easy installation. In some embodiments, bamboo plywood can also be used for bridge deck template components.
[0031] The V-shaped leg formwork assembly further includes square wood 3, which is laid between the outer bamboo plywood 21 and the outer rigid frame 1, and between the inner bamboo plywood 22 and the inner frame 7. The square wood 3 is a slender sawn timber with a rectangular cross section; in this embodiment, it is used as a secondary beam.
[0032] The tie assembly includes a finely rolled threaded steel bar and a steel pipe back rib arranged at both ends of the finely rolled threaded steel bar. The first tie assembly and the second tie assembly have the same structure, but the difference lies in the different tie structures. The first tie assembly uses finely rolled threaded steel bars and steel pipe back ribs to tie two outer rigid frames 1, and the second tie assembly uses finely rolled threaded steel bars and steel pipe back ribs to tie the outer rigid frames 1 and the inner frames 7.
[0033] The fine-rolled threaded steel bar adopts Φ14mm fine-rolled threaded steel bar, and its end is constrained and fixed by the mountain-shaped buckle 13 and two Φ48×3.6mm steel pipe back ribs to constrain and fix the arranged outer rigid frame 1, and to constrain and fix the outer rigid frame 1 and the inner frame 7 to bear the horizontal load in concrete construction.
[0034] To facilitate demoulding, the opposite sides of the outer bamboo plywood 21 and the inner bamboo plywood 22 are respectively provided with release agent layers.
[0035] The bridge deck formwork assembly is laid under the bridge deck of the rigid frame bridge to be constructed; the formwork frame assembly is supported under the bridge deck formwork assembly.
[0036] Specifically, Figure 1 , Figure 3 , Figure 6 As shown, the bridge deck template assembly includes a bridge deck body template 16 and a V-leg bridge deck template 12; the bridge deck body template 16 is laid under the bridge deck of the rigid frame bridge to be constructed, and its end is connected to the outer bamboo plywood 21; the V-leg bridge deck template 12 is arranged above the V-leg; the V-leg bridge deck template 12 and the V-leg are enclosed to form a flood discharge outlet. PVC pipes 14 are arranged at both ends of the V-leg bridge deck template 12 in the longitudinal direction of the bridge, and the length direction of the PVC pipes 14 is arranged along the transverse direction of the bridge.
[0037] The formwork support assembly includes a V-leg formwork support structure and a bridge deck formwork support structure.
[0038] The V-leg formwork support structure is supported between the V-leg bridge deck formwork 12 and the V-leg.
[0039] The bridge deck formwork structure is supported below the bridge deck body formwork 16 .
[0040] The bridge deck formwork frame structure includes: a steel pipe pile column 11, an I-beam frame and a buckle bracket 8; the upper end of the steel pipe pile column 11 is provided with an I-beam frame, and the upper end of the I-beam frame is provided with a buckle bracket 8, and the buckle bracket 8 is supported below the bridge deck body template 16. Among them, the V-leg formwork frame structure can also be supported by the buckle bracket 8 below the V-leg bridge deck template 12. When constructing the V-leg formwork frame structure, the V-leg has been completed and its strength reaches the design strength. In other words, in the rigid frame bridge of this embodiment, the V-leg is constructed first, and after the V-leg reaches the design strength, the V-leg formwork frame structure is installed at the flood discharge port (or inner cavity) above the V-leg, and the V-leg bridge deck template 12 is paved above the V-leg formwork frame structure to carry out the bridge deck construction above the V-leg. After the construction is completed, the V-leg and the bridge deck above the V-leg are enclosed to form a flood discharge port.
[0041] The method for constructing a V-shaped pier rigid frame bridge by using the formwork system of the cast-in-place continuous slab V-shaped pier rigid frame bridge of the utility model comprises the following steps:
[0042] The first step is to construct the bridge deck formwork frame structure to facilitate water operations and not affect flood discharge. The bridge deck formwork frame structure includes steel pipe pile columns 11, I-beam skeletons and buckle brackets 8, among which the I-beam skeleton includes double-joined I-beam crossbeams 10 and I-beam longitudinal beams 9. The bridge deck formwork frame structure is built in different spans. The overall bridge deck formwork frame structure is as follows from bottom to top: φ529×12mm steel pipe pile columns 11, 36b double-joined I-beam crossbeams 10, 36b I-beam longitudinal beams 9, 800*800*30mm thick steel plates, buckle brackets 8, 25# I-beam main ribs in the longitudinal direction, 100×100 square wood secondary ribs in the transverse direction, and bridge deck body template 16 (using 15mm bamboo plywood). It not only ensures the navigation requirements of the river, but also can withstand the loads of the bridge deck and V-shaped piers.
[0043] The second step is, Figure 2 -a, according to the design drawings, the specific positions of the bridge pier column circular curve starting point and end point are determined, and a 20b channel steel block is pre-embedded on the top of the pedestal to prevent the outer rigid frame 1 with a lower circular curve radius of 2000mm from shifting. First, the outer rigid frame 1 is assembled for trial, and the angle and curvature of the outer rigid frame 1 are checked to ensure the accuracy of the later pier column structure size.
[0044] The third step is Figure 2 -b, after checking the firmness of the outer rigid frame 1, the 100*100mm square timber 3 is laid. The square timber 3 at the upper and lower curved sections must be densely arranged, and the straight sections of the piers and V-shaped legs are placed at a spacing of 300mm. The square timber 3 at the transverse bridge position is staggered and overlapped, with the overlapped part not less than 30cm, and it is necessary to ensure that the square timber 3 and the outer rigid frame 1 are firmly fixed.
[0045] The fourth step is Figure 2 -c, select the outer bamboo plywood 21 with a thickness of 15 mm, and according to the structural size of the V-shaped pier and the curvature of the outer rigid frame 1, lay the outer bamboo plywood 21 on the outer side of the V-shaped pier to be constructed.
[0046] Step 5: Figure 2 -d, the back side of the outer rigid frame 1 is tensioned by the first tensioning assembly, and the steel pipe back ribs are pulled by the fine-rolled threaded steel of the first tensioning assembly to reinforce the outer rigid frame 1 to prevent the outer rigid frame 1 from deviating outward during the concrete pouring process. The vertical spacing of the steel pipe back ribs is arranged at 600mm, and the horizontal spacing of the fine-rolled threaded steel is the same as that of the outer rigid frame 1. Before pouring the vibration-damping concrete into the V-shaped cavity, check whether the first tensioning assembly is locked, and wrap three to four turns of tape around the end of the fine-rolled threaded steel to prevent loosening.
[0047] An inner bamboo plywood 22 is installed above the V-shaped leg to be constructed, and the inner bamboo plywood 22 is bent into a V-shaped structure. A square timber 3 is laid along the longitudinal direction of the bridge on the end face of the inner bamboo plywood 22 that is not facing the bridge pier, and an inner frame 7 is laid on the end face of the square timber 3 that is not facing the inner bamboo plywood 22. The inner frame 7 is arranged on the straight line section on the inner side of the V-shaped leg to be constructed. The inner frame 7 adopts a square tube, and its setting position corresponds to the outer rigid frame 1, as shown in FIG. Figure 5 As shown, a second tensioning assembly is used to pull the inner frame 7 and the straight section of the outer rigid frame 1, and the distance between the inner frame 7 and the outer rigid frame 1 is adjusted so that a V-shaped casting cavity for casting the V-shaped leg is formed between the inner bamboo plywood 22 and the outer bamboo plywood 21.
[0048] In addition, all bamboo plywood (including the inner bamboo plywood 22, the outer bamboo plywood 21 and the bridge deck body formwork 16) should be coated with two coats of release agent as an isolation layer (i.e., release agent layer) before each use. After each demoulding, the mortar and other attachments on the bamboo plywood should be cleaned up in time with a spatula, sandpaper, wire brush, etc. to make the surface of the bamboo plywood smooth, and tape or foam glue should be applied at the intersection of the board seams of the bamboo plywood.
[0049] Step 6: Before pouring concrete in the V-shaped casting cavity, wet the inner bamboo plywood 22 and the outer bamboo plywood 21 with water, and fill 3 to 5 cm of mortar with the same mix ratio as the concrete. The bridge should be poured crosswise and layered to the north and south sides, and vibrated layer by layer. The pouring thickness is 50 cm each time, and vibrated with a φ30 or φ50 inserted vibrator to make it dense. The steel bars and embedded parts must not be touched during the vibration. When pouring at the bottom of the arc of the V-shaped casting cavity, the vibrator must be deeply inserted to the bottom of the arc until the concrete no longer sinks significantly, no bubbles appear, and the slurry begins to overflow.
[0050] Step 7: Figure 6As shown, after the strength of the V-shaped legs (or V-shaped piers) reaches the design requirements, a V-shaped leg formwork frame structure is set up in the inner cavity (i.e., the flood discharge outlet), and then a V-shaped leg bridge deck formwork 12 is set up on the upper end of the V-shaped leg formwork frame structure, and a bridge deck body formwork 16 is set up between the longitudinal V-shaped piers and pre-pressed with sandbags. After the deformation and settlement are stable, the bridge deck of the side span and the upper end of the V-shaped piers is cast first, and then the bridge deck between the V-shaped piers is cast.
[0051] After the construction of the bridge deck is completed, the formwork system will be removed.
[0052] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.
Claims
1. A formwork system for a cast-in-place continuous slab V-shaped pier rigid frame bridge, characterized in that: include: V-leg formwork assembly, bridge deck formwork assembly and formwork support assembly; The V-shaped leg formwork assembly comprises an outer bamboo plywood, an inner bamboo plywood, an outer rigid frame, an inner frame and an anchor assembly; the outer bamboo plywood is laid on the two opposite outer sides of the V-shaped legs of the rigid frame bridge to be constructed, and the curvature of the outer bamboo plywood matches the curvature of the outer side of the V-shaped legs; the inner bamboo plywood is laid on the inner side of the V-shaped legs, and the curvature of the inner bamboo plywood matches the curvature of the inner side of the V-shaped legs; a spacing is maintained between the outer bamboo plywood and the inner bamboo plywood to form a V-shaped casting cavity for the V-shaped legs to be cast in situ; the curvature of the outer rigid frame matches the curvature of the outer bamboo plywood, and is laid on the outer side of the outer bamboo plywood along the transverse direction of the bridge; the inner frame is arranged on the inner side of the inner bamboo plywood; the anchor assembly anchors the outer rigid frame and the inner frame; The bridge deck formwork assembly is laid under the bridge deck of the rigid frame bridge to be constructed; The formwork support assembly is supported below the bridge deck formwork assembly.
2. The formwork system of a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 1, characterized in that: The anchoring assembly includes a first pair of anchoring members and a second pair of anchoring members. The first pair of anchoring members anchors outer rigid frames at two opposite outer sides of the V-shaped leg, and the second pair of anchoring members anchors the outer rigid frames and the inner frames.
3. The formwork system of a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 1, characterized in that: The V-shaped leg formwork assembly also includes square timber, which is laid between the outer bamboo plywood and the outer rigid frame, and the square timber is also laid between the inner bamboo plywood and the inner frame.
4. The formwork system of a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 1, characterized in that: The tie assembly comprises a precision-rolled threaded steel bar and a steel pipe back rib arranged at both ends of the precision-rolled threaded steel bar.
5. The formwork system for a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 1, characterized in that: The V-shaped leg formwork assembly also includes a limiting member, which is arranged on the top of the pedestal of the rigid frame bridge, and the bottom of the outer rigid frame is located on the inner side of the limiting member.
6. The formwork system for a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 1, characterized in that: The opposite sides of the outer bamboo plywood and the inner bamboo plywood are respectively provided with release agent layers.
7. The formwork system for a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 1, characterized in that: The bridge deck formwork assembly includes a bridge deck body formwork and a V-leg bridge deck formwork; the bridge deck body formwork is laid under the bridge deck of the rigid frame bridge to be constructed, and its end is butted against the outer bamboo plywood; the V-leg bridge deck formwork is arranged above the V-leg; the V-leg bridge deck formwork and the V-leg enclose a flood discharge outlet.
8. The formwork system for a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 7, characterized in that: PVC pipes are arranged at both ends of the V-shaped leg bridge deck template in the longitudinal direction of the bridge, and the length direction of the PVC pipes is arranged along the transverse direction of the bridge.
9. The formwork system for a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 7, characterized in that: The formwork support assembly includes a V-shaped leg formwork support structure and a bridge deck formwork support structure; The V-shaped leg formwork support structure is supported between the V-shaped leg bridge deck formwork and the V-shaped leg; The bridge deck formwork structure is supported below the bridge deck body formwork.
10. The formwork system of a cast-in-place continuous slab V-shaped pier rigid frame bridge according to claim 9, characterized in that: The bridge deck formwork frame structure includes: steel pipe pile columns, I-beam frames and buckle brackets; the I-beam frame is arranged at the upper end of the steel pipe pile columns, the buckle bracket is arranged at the upper end of the I-beam frame, and the buckle bracket is supported below the bridge deck body formwork.