CN219059775U

CN219059775U - Supporting system for bent cap construction

Info

Publication number: CN219059775U
Application number: CN202222655431.4U
Authority: CN
Inventors: 田琦; 刘洋; 胡昱成; 黄达青; 余阳; 魏莹; 石昆鹏; 张遵伟; 曾斌; 丁宽
Original assignee: Wuhan Municipal Engineering Mechanization Construction Co ltd
Current assignee: Wuhan Municipal Engineering Mechanization Construction Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-05-23
Anticipated expiration: 2032-10-08

Abstract

The utility model discloses a support system for bent cap construction, which is characterized by comprising an embedded part, a stressed part, a jack, a guide beam, a template support assembly and a bent cap template; the embedded part is embedded in the bridge pier column, the stress part penetrates through the embedded part, and two ends of the stress part horizontally extend out from the end part of the embedded part; the two ends of the stress piece are respectively provided with a jack, the upper end of the jack is provided with a guide beam, and the length direction of the guide beam is consistent with the length direction of the capping beam; the two guide beams are respectively arranged at two sides of the bridge pier, are connected through opposite-pull screws arranged at intervals, and clamp the bridge pier; the template support assembly is arranged on the two guide beams, and the bent cap template is arranged on the template support piece. The beneficial effects of the utility model are as follows: the embedded part is embedded in the bridge pier column, the stress part penetrates through the embedded part and supports the upper structures such as the jack, and the embedded support structure is safe and reliable, so that the on-site welding workload is greatly reduced, the construction cost is reduced, the erection and disassembly efficiency is high, the construction period is saved, and the method is economical and reasonable.

Description

Supporting system for bent cap construction

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a support system for bent cap construction.

Background

Along with the development of bridge construction, new technology and new technology of bridge construction are continuously introduced, improved, created and developed, and newly built bridge lines are increasingly increased. Overpasses are very widely used in urban global line design. In order to overcome the ground complexity and the influence of under-bridge traffic, a large-scale bearing platform foundation is generally adopted for the lower structure of the viaduct. In modern bridge construction, the supporting system of the bent cap is particularly important to engineering quality, progress, safety and economy. In the traditional bent cap construction method, the full framing method and the bailey frame superposition method have higher requirements on site foundation conditions, and the foundation treatment cost is high; the hoop method is generally used for circular bridge pier columns, if square piers are used on site, the common hoop friction force often cannot meet the requirements, and the safety is poor; the pre-buried steel plate method needs to consume a large amount of steel, is very uneconomical, and the welding workload of steel support is big, and the requirement on welding quality is also higher, and the coping construction is accomplished the back and need repair the bridge pier stud, takes time and labor and can't guarantee the quality. Accordingly, there is a need for improvements over the prior art.

Disclosure of Invention

The utility model aims to provide an economical, reasonable, safe and reliable support system for bent cap construction, which aims at the defects of the prior art.

The utility model adopts the technical scheme that: a support system for bent cap construction comprises an embedded part, a stressed part, a jack, a guide beam, a template support assembly and a bent cap template; the embedded part is embedded in the bridge pier column, the stress part penetrates through the embedded part, and two ends of the stress part horizontally extend out from the end part of the embedded part; the two ends of the stress piece are respectively provided with a jack, the upper end of the jack is provided with a guide beam, and the length direction of the guide beam is consistent with the length direction of the capping beam; the two guide beams are respectively arranged at two sides of the bridge pier, and are connected through opposite-pull screws which are arranged at intervals so as to clamp the bridge pier; the template support assembly is arranged on the two guide beams, and the bent cap template is arranged on the template support piece.

According to the scheme, the template supporting component comprises a plurality of section steel beams and a plurality of square timber, the section steel beams are arranged at intervals along the length direction of the guide beams, and two ends of the section steel beams are respectively fixed on the guide beams at two sides; a plurality of square timber intervals are installed on the shaped steel roof beam, and the length direction of square timber is unanimous with the length direction of nose girder.

According to the scheme, the bent cap template comprises a bent cap bottom template and two bent cap side templates; the bent cap bed templates are paved on square lumber, the two bent cap side templates are symmetrically installed on the bent cap bed templates by taking bridge pier columns as centers, and the two bent cap side templates are oppositely pulled through pull rods.

According to the scheme, guardrails are arranged on two sides of the bent cap bottom template.

According to the scheme, the two ends of the stress piece are respectively fixed with the base, and the bottom of the jack is arranged on the base.

According to the scheme, the base is formed by enclosing and welding steel plates, the base is sleeved on the stress piece, and a gap between the inner wall of the base and the stress piece is filled with wood blocks; the end part of the base is welded and fixed with the stress piece through angle iron.

According to the scheme, the embedded part is a PVC pipeline.

According to the scheme, the stress piece is a steel rod, and the steel rod and the PVC pipeline are coaxially arranged.

According to the scheme, the guide beam is made of I-steel.

According to the scheme, a gasket is arranged between the bottom of the jack and the base; the gasket is made of steel plates.

The beneficial effects of the utility model are as follows: the utility model adopts the pre-buried support structure form, the weight of the bracket, the template and the whole bent cap is transmitted to the pier column through the section steel, the pier column bears the weight, the force transmission path is simple and clear, the problem of bracket sinking does not exist, the structure form is safe and reliable, the field welding workload is greatly reduced, the construction cost is reduced, the construction efficiency is high, the construction period is saved, and the utility model is economical and reasonable; the utility model adopts the form of the pre-buried support structure, has no special requirement on the bearing capacity of the foundation, does not need to set up a bearing bracket, reduces the consumption of auxiliary materials such as steel, and the like, has the advantages of simple erection, cost saving and good stability, and can be used for operating and circulating time periods.

Drawings

Fig. 1 is a schematic plan view of an embodiment of the present utility model.

Fig. 2 is a schematic side view of the present embodiment.

Fig. 3 is a cross-sectional view A-A of fig. 2.

Fig. 4 is a schematic cross-sectional view of the base and the force-bearing member in the present embodiment.

Wherein: 1-an embedded part; 2-a force-bearing member; 3-a base; 4-jack; 5-opposite-pulling a screw; 6-guide beams; 7-section steel beams; 8-square timber; 9-a bent cap bottom template; 10-a bent cap side template; 11-guard bars; 12-bridge pier; 13-a capping beam; 14-angle iron; 15-a gasket; 16-triangle wood block.

Detailed Description

For a better understanding of the present utility model, the present utility model is further described below with reference to the drawings and specific examples.

The supporting system for the construction of the bent cap 13 shown in fig. 1 and 2 comprises an embedded part 1, a stress part 2, a jack 4, a guide beam 6, a template supporting component and a bent cap template; the embedded part 1 is embedded in the bridge pier column 12, the stressed part 2 penetrates through the embedded part 1, and two ends of the stressed part 2 horizontally extend out from the end part of the embedded part 1; the two ends of the stress piece 2 are respectively provided with a jack 4, the upper end of the jack 4 is provided with a guide beam 6, and the length direction of the guide beam 6 is consistent with the length direction of a capping beam 13; the two guide beams 6 are respectively arranged at two sides of the bridge pier 12, and the two guide beams 6 are connected through the opposite-pull screws 5 which are arranged at intervals so as to clamp the bridge pier 12, as shown in fig. 3; the template support components are arranged on the two guide beams 6, and the bent cap template is arranged on the template support piece.

In this embodiment, the embedded part 1 is a PVC pipe, and when in construction, both ends of the PVC pipe are embedded in the bridge pier 12 after being sealed, after the bridge pier 12 is removed, both ends of the PVC pipe are cleaned, and when the pier concrete strength reaches the design strength, the stress part 2 is inserted into the PVC pipe.

In the embodiment, the stress piece 2 is a steel bar with phi of 100mm, the steel bar and the PVC pipeline are coaxially arranged, the reserved length of two ends exceeds the end part of the section steel beam 7 by 30cm, and the distance between the end part of the steel bar and the center of the bridge pier column 12 is 200mm.

In the embodiment, the guide beam 6 is made of I45a I-steel, and the guide beam 6 is symmetrically hung on the jacks 4 at two sides of the bridge pier 12; a counter-pulling screw rod 5 is arranged between the guide beams 6 at two sides, and gaskets 15 and double nuts are arranged at two ends of the counter-pulling screw rod 5; the two guide beams 6 are tensioned and clamped by the opposite-pulling screws 5 to the bridge pier 12.

In this embodiment, the jack 4 is a mechanical jack 4.

Preferably, the formwork support assembly comprises a plurality of section steel beams 7 and a plurality of square timber beams 8, the section steel beams 7 are arranged at intervals along the length direction of the guide beams 6, and two ends of the section steel beams 7 are respectively fixed on the guide beams 6 at two sides; the square timber 8 is installed on the section steel beam 7 at intervals, and the length direction of the square timber 8 is consistent with the length direction of the guide beam 6.

Preferably, the bent cap template comprises a bent cap bottom template and two bent cap side templates 10; the bent cap bed templates 9 are paved on the square lumber 8, two bent cap side templates 10 are symmetrically installed on the bent cap bed templates 9 by taking bridge pier columns 12 as the center, and the two bent cap side templates 10 are oppositely pulled through pull rods.

Preferably, guardrails 11 are provided on both sides of the bent cap bed plate 9.

In this embodiment, the section steel beam 7 is made of I16I-steel, the section steel beam 7 is laid on the guide beam 6 in the transverse bridge direction, and the end part of the section steel beam 7 exceeds the same side part of the cap beam 13 by 85cm.

In the embodiment, the side template 10 of the bent cap is made of a Q235 steel plate with the thickness of 6mm, and sundries between the bottom template 9 of the bent cap and steel bars of the bent cap 13 are cleaned before installation; when the bent cap side templates 10 are assembled, the bent cap side templates are assembled by manually matching with a crane in a blocking way, two adjacent templates are connected by adopting phi 18 bolts, and two opposite bent cap side templates 10 are connected by adopting an upper pull rod and a lower pull rod on a lacing wire seat.

Preferably, the two ends of the stress piece 2 are respectively fixed with a base 3, and the bottom of the jack 4 is installed on the base 3. The base 3 is formed by steel plate enclosing welding, the base 3 is sleeved on the stress piece 2, and a gap between the inner wall of the base 3 and the stress piece 2 is filled with wood blocks 16; the end part of the base 3 is welded and fixed with the stress piece 2 through angle iron 14.

In this embodiment, the base 3 is made of a steel plate with a thickness of 30mm, the base 3 is sleeved on a steel rod (namely, the stress piece 2), a gap between the steel rod and the inner wall of the base 3 is firmly plugged and knocked by a triangular wood block 16 (as shown in fig. 4), and two sides of the base are firmly welded with the steel rod by angle irons 14, so that the steel rod is prevented from moving in the base 3. The two sides of the base 3 exceed the outer wall of the steel bar by 5mm. A gasket 15 is arranged between the bottom of the jack 4 and the base 3; the gasket 15 is made of steel plate.

The construction method of the embodiment comprises the following steps: the embedded part 1 is radially arranged along the bridge pier column 12 at a certain height (about 1.2-1.3 m) downwards at each column top and perpendicular to the axis of the capping beam 13, a PVC pipe is adopted as the embedded part 1 (the inner diameter of the pipe is 110 mm), and two ends of the embedded part 1 are sealed; after the pier column template is removed, two ends of the PVC pipe are cleaned out, and when the pier column concrete strength reaches more than 100% of the design strength, the stress piece 2 is installed. The stress piece 2 is a penetrating steel rod with phi of 100mm, penetrates into the embedded piece 1, the reserved lengths at the two ends exceed the guide beam by 30cm, the two ends of the steel rod are sleeved outside the bridge pier column 12 and are in a base 3 with the width of 200mm and the thickness of 30mm, and the inner diameter of the base 3 is 10mm larger than the diameter of the steel rod so as to facilitate penetration; the gaps between the four corners of the inner wall of the base 3 and the outer wall of the steel bar are firmly plugged and knocked by triangular wood blocks 16, so that the steel bar is prevented from moving in the base 3; the base 3 is welded to the load bearing member 2 using angle iron 14. The jack 4 is placed on the top of the base 3, and a gasket 15 is arranged below the jack. The guide beams 6 are symmetrically hung on the jacks 4 at two sides of the bridge pier 12, and the guide beams 6 are oppositely penetrated with opposite-pull screws 5 with phi of 16mm, gaskets and double nuts are arranged at two sides of the opposite-pull screws 5, so that the guide beams 6 clamp the bridge pier 12 to form a whole. After the two I45a I-steel guide beams 6 are installed, transverse bridge directions on the guide beams 6 are paved with section steel beams 7 at intervals of 30cm, and the section steel beams 7 are respectively 85cm wider than the cover beams 13. The construction platforms are erected on two sides, and the guardrails 11 are installed. After the building of the section steel beam 7 is completed, measuring the central point and the elevation of each section steel beam, paving the height through a bracket under the height Cheng Diaozheng, paving square timber 8 with the distance of 100mm multiplied by 100mm along the bridge direction on the section steel beam 7 after the height adjustment, paving a cover beam bottom template 9 on the square timber 8, and arranging a pair of pull rod reinforcing templates at the upper part and the lower part of the cover beam side templates 10 at the two sides. The templates are installed from the bridge pier 12, chamfering templates at two ends are installed, normal segment templates are paved from two ends to the middle in sequence, and the height, the transverse gradient and the flatness of the bottom die are adjusted and controlled; the installation of the template is conventional and will not be described in detail here.

Finally, it should be noted that the foregoing is merely a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and although the present utility model has been described in detail with reference to the embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but any modifications, equivalents, improvements or changes thereof may be made without departing from the spirit and principle of the present utility model.

Claims

1. The support system for the bent cap construction is characterized by comprising an embedded part, a stressed part, a jack, a guide beam, a template support assembly and a bent cap template; the embedded part is embedded in the bridge pier column, the stress part penetrates through the embedded part, and two ends of the stress part horizontally extend out from the end part of the embedded part; the two ends of the stress piece are respectively provided with a jack, the upper end of the jack is provided with a guide beam, and the length direction of the guide beam is consistent with the length direction of the capping beam; the two guide beams are respectively arranged at two sides of the bridge pier, are connected through opposite-pull screws arranged at intervals, and clamp the bridge pier; the template support assembly is arranged on the two guide beams, and the bent cap template is arranged on the template support piece.

2. The support system for bent cap construction according to claim 1, wherein the formwork support assembly comprises a plurality of section steel beams and a plurality of square lumber, the section steel beams are arranged at intervals along the length direction of the guide beams, and two ends of the section steel beams are respectively fixed on the guide beams at two sides; a plurality of square timber intervals are installed on the shaped steel roof beam, and the length direction of square timber is unanimous with the length direction of nose girder.

3. The support system for bent cap construction of claim 2, wherein the bent cap form comprises a bent cap base form and two bent cap side forms; the bent cap bed templates are paved on square lumber, the two bent cap side templates are symmetrically installed on the bent cap bed templates by taking bridge pier columns as centers, and the two bent cap side templates are oppositely pulled through pull rods.

4. The support system for bent cap construction according to claim 3, wherein guardrails are provided at both sides of the bottom formwork of the bent cap.

5. The support system for bent cap construction according to claim 1, wherein the force receiving members are respectively fixed with bases at both ends thereof, and the bottoms of the jacks are mounted on the bases.

6. The support system for bent cap construction according to claim 5, wherein the base is formed by steel plate enclosing welding, the base is sleeved on the stress piece, and a gap between the inner wall of the base and the stress piece is filled with wood blocks; the end part of the base is welded and fixed with the stress piece through angle iron.

7. The support system for bent cap construction of claim 1, wherein the embedded part is a PVC pipe.

8. The support system for bent cap construction of claim 7, wherein the stress member is a steel rod coaxially arranged with the PVC pipe.

9. The support system for use in capping beam construction of claim 7 wherein the guide beam is fabricated from i-steel.

10. The support system for bent cap construction according to claim 5, wherein a spacer is provided between the bottom of the jack and the base; the gasket is made of steel plates.