CN211596406U

CN211596406U - Cast-in-place beam formwork support structure

Info

Publication number: CN211596406U
Application number: CN201921213043.2U
Authority: CN
Inventors: 朱淑兰; 覃晶; 陆有传; 陈俊锟
Original assignee: Shanghai Civil Engineering Co Ltd of CREC; Fifth Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Current assignee: Shanghai Civil Engineering Co Ltd of CREC; Fifth Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-09-29
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a cast-in-place beam formwork support structure, which comprises a cast-in-place beam formwork, small ridges, main ridges and full space supports, wherein the cast-in-place beam formwork adopts high-quality bamboo plywood, square wood is transversely laid along a bridge under the formwork to serve as the small ridges, the spacing between the small ridges on the standard section of a box girder is 0.3m, and the spacing between invisible bent cAN _ SNs and the gradual change section thereof is 0.2 m; two phi 48 steel pipes are laid under the small ridges along the longitudinal direction of the bridge to serve as main ridges, the spacing between the main ridges on the standard section of the box girder is 1.2m, and the spacing between the sections of the invisible cover girder and the web plate is 0.6 m; the full support adopts a bowl-buckled scaffold; the utility model discloses it is many to have the turnover number of times, and the turnover time is short, uses auxiliary assembly few, has reduced the waste of manpower goods and materials, and the cast-in-place roof beam construction of specially adapted multispan has both guaranteed the engineering quality, can accelerate the construction progress again, has good economic benefits.

Description

Cast-in-place beam formwork support structure

Technical Field

The utility model relates to a bridge construction technology field specifically is cast-in-place beam mold board bearing structure.

Background

The bridge is generally a structure which is erected on rivers, lakes and seas and allows vehicles, pedestrians and the like to smoothly pass through. In order to adapt to the modern high-speed developed traffic industry, bridges are also extended to be constructed to span mountain stream, unfavorable geology or meet other traffic needs, so that the buildings are convenient to pass; the bridge generally comprises an upper structure, a lower structure, a support and an auxiliary structure, wherein the upper structure is also called a bridge span structure and is a main structure for spanning obstacles; the lower structure comprises a bridge abutment, a bridge pier and a foundation; the support is a force transmission device arranged at the supporting positions of the bridge span structure and the bridge pier or the bridge abutment; the auxiliary structures refer to bridge end butt straps, tapered revetments, diversion works and the like.

The full framing method is a construction method of scaffolds which are densely arranged at certain intervals and play a supporting role. The method is commonly used for cast-in-place bridge construction and cast-in-place floor construction at present. The construction of the full framing method is a long-term adopted method, and a large number of formwork supports are required during construction. The construction of the support method is that a support is erected at a bridge position, bridge body concrete is poured on the support, and a template and the support are removed after the concrete reaches the strength; the sizes and the installation distances of the templates and the supports are different due to different construction schemes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cast-in-place roof beam template bearing structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the cast-in-place beam formwork supporting structure comprises a cast-in-place beam formwork, small ridges, main ridges and full space supports, wherein the cast-in-place beam formwork adopts high-quality bamboo plywood, square wood is paved under the formwork along the transverse direction of a bridge to serve as the small ridges, the distance between the small ridges on the standard section of a box beam is 0.3m, and the distance between an invisible bent cap and a gradual change section of the invisible bent cap is 0.2 m; two phi 48 steel pipes are laid under the small ridges along the longitudinal direction of the bridge to serve as main ridges, the spacing between the main ridges on the standard section of the box girder is 1.2m, and the spacing between the sections of the invisible cover girder and the web plate is 0.6 m; the full support adopts a bowl-buckled scaffold.

Furthermore, the specification of the bamboo plywood is 2.44 × 1.22 × 0.015m, and the specification of the square timber is 10cm × 10 cm.

Further, when the height of the scaffold is less than or equal to 20m, a group of vertical through-height cross braces are arranged at intervals of 5 spans; when the height of the scaffold is more than 20m, a group of vertical through-height cross braces are arranged at intervals of 3 spans; the cross braces are symmetrically arranged, the cross braces are preferably arranged in a splayed shape, the horizontal inclination angle of the cross braces is preferably 45-60 degrees, and the interval between the longitudinal cross braces can be 1-2 spans.

Furthermore, an adjustable jacking support is adopted between the upper part of the full framing scaffold and the main ridge, and a steel plate with the thickness of 10cm by 1cm is arranged below the bottom of the full framing scaffold.

Furthermore, the joints of the steel bars with the diameter smaller than 25mm are welded in an overlapping mode, and the joints of the steel bars with the diameter larger than or equal to 25mm are mechanically connected. The joints for connecting the steel bars should meet the requirements of design and construction specifications.

Furthermore, when welding is carried out on the aerial working face, single-face lap welding is adopted, the length of a welding line is not less than 10d, the number of all steel bar joints does not exceed 50% of the number of the steel bars with the same cross section, the steel bars and the prestressed bars are arranged in a staggered mode, and the hollow slab beam steel bars and the prestressed bars are installed.

Furthermore, the vertical and horizontal spacing of the scaffold at the standard section of the box girder is 0.6m by 0.9m, and the step pitch is 1.2 m.

Furthermore, the vertical and horizontal spacing of the scaffold at each web plate is encrypted to 0.6m by 0.6m, 3 rows are arranged in total, and the step pitch is 1.2 m.

Furthermore, the vertical and horizontal spacing of the scaffold at the invisible capping beam is encrypted to 0.6m by 0.6m, 7 rows are arranged in total, and the step pitch is 1.2 m.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the safety of engineering construction, high quality, economy and reasonability and remarkable social benefit are ensured;

2. the construction method has the advantages of multiple turnover times, short turnover time, less use of auxiliary equipment, reduction of waste of manpower and materials, particular suitability for construction of the multi-span cast-in-place beam, guarantee of engineering quality, acceleration of construction progress and good economic benefit.

Drawings

Fig. 1 is a cross-sectional view of a cast-in-place beam full-space support in a cast-in-place beam formwork support structure.

Fig. 2 is a longitudinal sectional view of a cast-in-place beam full-space support in a cast-in-place beam formwork support structure.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1-2, the cast-in-place beam formwork support structure comprises a cast-in-place beam formwork, small ridges, main ridges and full space supports, wherein the cast-in-place beam formwork adopts 2.44 × 1.22 × 0.015m high-quality bamboo plywood (length × width × thickness), 10cm × 10cm square wood is transversely paved under the formwork along a bridge to serve as the small ridges, the spacing between the small ridges on the standard section of a box beam is 0.3m, and the spacing between an invisible capping beam and a gradual change section thereof is 0.2 m; two phi 48 steel pipes are laid under the small ridges along the longitudinal direction of the bridge to serve as main ridges, the spacing between the main ridges on the standard section of the box girder is 1.2m, and the spacing between the sections of the invisible cover girder and the web plate is 0.6 m; the full-hall support adopts a bowl-buckled scaffold, the longitudinal and transverse spacing of the scaffold at the standard section of the box girder is 0.6m by 0.9m, and the step pitch is 1.2 m; the longitudinal and transverse intervals of the scaffold at each web plate are encrypted to be 0.6m by 0.6m, 3 rows are arranged in total, and the step pitch is 1.2 m; the vertical and horizontal spacing of the scaffold at the invisible capping beam is encrypted to 0.6m by 0.6m, 7 rows are arranged in total, and the step pitch is 1.2 m.

Further, when the height of the scaffold is less than or equal to 20m, a group of vertical through-height cross braces are arranged at intervals of 5 spans; when the height of the scaffold is more than 20m, a group of vertical through-height cross braces are arranged at intervals of 3 spans;

furthermore, the cross braces are symmetrically arranged, the cross braces are preferably arranged in a splayed shape, the horizontal inclination angle of the cross braces is preferably 45-60 degrees, and the interval between the longitudinal cross braces can be 1-2 spans.

Furthermore, when welding is carried out on the aerial working face, single-face lap welding is adopted, the length of a welding line is not less than 10d, the number of all steel bar joints does not exceed 50% of the number of steel bars with the same cross section, the steel bars and the prestressed bars are arranged in a staggered mode, and the hollow slab beam steel bars and the prestressed bars are arranged and matched with the installation sequence of the templates.

Furthermore, the steel bar material entering the field must have a factory qualification document, and must be accepted according to the standard of the technical specification of highway bridge construction, raw material tests and welding tests are made in batches, and the steel bar material can be used after being qualified.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. The cast-in-place beam formwork supporting structure is characterized by comprising a cast-in-place beam formwork, small ridges, main ridges and full space supports, wherein the cast-in-place beam formwork adopts high-quality bamboo plywood, square wood is paved on the lower portion of the formwork along the transverse direction of a bridge to serve as the small ridges, the distance between the small ridges on the standard section of a box girder is 0.3m, and the distance between the invisible bent cap and the gradual change section of the invisible bent cap is 0.2 m; two phi 48 steel pipes are laid under the small ridges along the longitudinal direction of the bridge to serve as main ridges, the spacing between the main ridges on the standard section of the box girder is 1.2m, and the spacing between the sections of the invisible cover girder and the web plate is 0.6 m; the full-hall support adopts a bowl-buckled scaffold, when the height of the scaffold is less than or equal to 20m, a group of vertical through-height cross braces are arranged at intervals of 5 spans, and when the height of the scaffold is more than 20m, a group of vertical through-height cross braces are arranged at intervals of 3 spans; the cross braces are symmetrically arranged, the cross braces are preferably arranged in a splayed shape, the horizontal inclination angle of the cross braces is preferably 45-60 degrees, and the interval between the longitudinal cross braces can be 1-2 spans.

2. The cast-in-place beam formwork support structure of claim 1, wherein the bamboo plywood gauge is 2.44 x 1.22 x 0.015m and the square lumber gauge is 10cm x 10 cm.

3. The cast-in-place beam formwork support structure of claim 1, wherein adjustable jacking supports are adopted between the upper part of the scaffold and the main ridge, and a steel plate with the thickness of 10cm x 1cm is padded below the bottom of the scaffold.

4. The cast-in-place beam formwork support structure of claim 1, wherein joints of steel bars with a diameter smaller than 25mm in the cast-in-place beam formwork support structure are welded in a lap joint mode, and joints of steel bars with a diameter larger than or equal to 25mm are mechanically connected; the joints for connecting the steel bars should meet the requirements of design and construction specifications.

5. The cast-in-place beam formwork support structure according to claim 1, wherein when welding is performed on an overhead working surface, single-side lap welding is adopted, the length of a welding line is not less than 10d, the number of all steel bar joints is not more than 50% of the number of steel bars with the same section, the steel bars and the prestressed bars are arranged in a staggered mode, and the hollow slab beam steel bars and the prestressed bars are installed.

6. A cast-in-place beam formwork support structure as claimed in claim 1, wherein the scaffolding has a vertical and horizontal spacing of 0.6m x 0.9m and a step spacing of 1.2m at a standard section of the box beam.

7. A cast-in-place beam formwork support structure according to claim 1, wherein the scaffolding at each web is dense in rows and columns of 0.6m by 0.6m, for a total of 3 rows, at a step pitch of 1.2 m.

8. A cast-in-place beam formwork support structure as claimed in claim 1, wherein the scaffolding at the invisible capping beam is densely spaced 0.6m by 0.6m in length and width, for a total of 7 rows, at a step pitch of 1.2 m.