阅读说明：本技术 一种装配式盖板涵主体结构及其施工方法 (Main body structure of assembled slab culvert and construction method thereof ) 是由 刘凯 谌意雄 李敏峰 李球世 张磊 黎强 于 2021-07-13 设计创作，主要内容包括：本发明公开了一种装配式盖板涵主体结构,包括预制底板、预制台身和预制盖板,所述底板内预埋有锚固螺栓,所述台身底部设置有底座骨架钢板、底座侧钢板、加劲钢板和矩形螺纹钢筋,所述底座骨架钢板与锚固螺栓通过双层螺帽连接,所述台身上设置有用于安装吊具的预埋螺栓,所述盖板设置于台身上端的台帽上,所述底座骨架钢板下方设置有粘钢胶层,所述台身底部的临水一侧设置有不锈钢箱盖,所述临水一侧底座骨架钢板和底座侧钢板容置于不锈钢箱盖内。解决了现有盖板涵施工效率低、施工养护质量参差不齐的问题。(The invention discloses an assembled cover plate culvert main body structure which comprises a prefabricated bottom plate, a prefabricated platform body and a prefabricated cover plate, wherein anchor bolts are pre-embedded in the bottom plate, a base framework steel plate, a base side steel plate, a stiffening steel plate and rectangular thread steel bars are arranged at the bottom of the platform body, the base framework steel plate is connected with the anchor bolts through double-layer nuts, the platform body is provided with the pre-embedded bolts for mounting a lifting appliance, the cover plate is arranged on a platform cap at the upper end of the platform body, a steel adhesive layer is arranged below the base framework steel plate, a stainless steel box cover is arranged on the water-contacting side of the bottom of the platform body, and the base framework steel plate and the base side steel plate on the water-contacting side are accommodated in the stainless steel box cover. The problems of low construction efficiency and uneven construction and maintenance quality of the existing plate culvert are solved.)

1. The utility model provides a major structure is contained to assembled apron which characterized in that: comprises a prefabricated bottom plate (1), a prefabricated platform body (2) and a prefabricated cover plate (3), an anchoring bolt (4) is embedded in the bottom plate (1), a base framework steel plate (5), a base side steel plate (6), a stiffening steel plate (7) and rectangular thread steel bars (19) are arranged at the bottom of the platform body (2), the base framework steel plate (5) is connected with the anchor bolt (4) through a double-layer nut (8), the platform body (2) is provided with a platform body embedded bolt (13) for installing a lifting appliance, the cover plate (3) is arranged on the table cap at the upper end of the table body (2), a steel adhesive layer is arranged below the base framework steel plate (5), a stainless steel box cover (10) is arranged on the water-facing side of the bottom of the platform body (2), the base framework steel plate (5) on the side close to water and the base side steel plate (6) are accommodated in the stainless steel box cover (10).

2. A construction method of an assembled plate culvert body structure according to claim 1, characterized by comprising the following steps:

s1, construction preparation, namely judging whether the elevation and the design size of an inlet and an outlet of the plate culvert meet the actual requirements or not according to a design drawing and the actual terrain and geological conditions of a site, preparing materials and equipment required by the assembled plate culvert, determining a material stacking, prefabricating and hoisting site, and hardening a corresponding transportation sidewalk;

s2, partitioning the slab culvert structure according to the segmentation requirements of the design drawing, synchronously prefabricating the slab culvert in a prefabricating yard when constructing the roadbed, and numbering and storing after pre-assembling;

s3, construction lofting, foundation pit construction, leveling of a construction site and making temporary drainage measures;

s4, paving and leveling a gravel cushion;

s5, conveying the prefabricated bottom plate to a construction site, installing the prefabricated bottom plate according to the number, compacting backfill materials on the side of the bottom plate, reserving a settlement joint, welding a platform body installation guide frame on the bottom plate embedded steel plate, and installing a platform body temporary support;

s6, transporting the prefabricated platform body to a construction site, installing a slab culvert platform body overhanging structure and a hanging point, hoisting the platform body structure on a platform body temporary support according to the number, arranging a three-dimensional jack temporary support under the platform body overhanging structure, and installing a three-dimensional jack;

s7, vertically jacking a three-dimensional jack, finely adjusting the position of a prefabricated platform body on a plane, spraying high-strength viscose glue after bolt holes of a bottom steel plate of a base of the platform body are aligned with pre-buried anchor bolts of a bottom plate, uniformly smearing the high-strength viscose glue when the temporary support of the platform body is moved out from one side by using the self weight of the temporary support of the platform body, vertically and slowly retracting the three-dimensional jack, installing an anchor bolt backing plate, a double-layer nut and a protection bolt, and dismantling a platform body installation guide frame, the three-dimensional jack and the temporary support of the three-dimensional jack;

s8, after polyurethane foaming glue is sprayed around the periphery of the embedded bolt gasket of the bottom plate, a stainless steel protective cover of the anchor bolt is installed, an anti-scouring stainless steel box cover is welded on the base framework steel plate on the side close to water, and polyurethane foaming glue is sprayed in a gap for sealing;

s9, circularly constructing a cover plate culvert bottom plate and a platform body, and installing a prefabricated cover plate;

s10, constructing a cover plate culvert opening structure and cap stones;

s11, filling settlement joint and cover plate joint materials;

s12, filling soil behind the layered backfilling platform and filling soil on the top of the culvert;

and S13, forming the roadbed.

3. The construction method according to claim 2, characterized in that: the thickness of the high-strength steel adhesive is 3-5mm, and the initial setting time is more than 1 hour.

Technical Field

The invention relates to the field of slab culvert construction processes, in particular to an assembled slab culvert main body structure and a construction method thereof.

Background

In recent years, with the acceleration of road traffic construction in China, more and more road projects begin to enter the implementation stage. Aiming at the problems of large environmental influence, long construction period, high carbon emission, uneven field maintenance quality and the like of the traditional cast-in-place slab culvert structure construction, the research on the novel design and construction technology of the main structure of the fabricated slab culvert, which is suitable for being adopted in the road traffic construction of China, is innovative work with economic, social and ecological benefits from the aspects of technical advancement, applicability, reliability, safety and economy. The traditional slab culvert construction method comprises the following steps: 1. construction lofting and foundation pit construction; 2. leveling a construction site, and making temporary drainage measures; 3. paving and leveling gravel cushion layers and prefabricating a concrete cover plate in a prefabricating field; 4. binding bottom plate reinforcing steel bars in sections, installing a bottom plate concrete template, and pouring bottom plate concrete; 5. curing the bottom plate concrete, and removing the bottom plate concrete template after the concrete strength reaches the design requirement; 6. installing a platform body template in sections, pouring platform body concrete, binding platform cap reinforcing steel bars, installing the platform cap template and pouring the platform cap concrete; 7. maintaining concrete of the platform body and the platform cap, and removing concrete templates of the platform body and the platform cap after the strength of the concrete meets design requirements; 8. the method comprises the steps of cast-in-place construction of a cover plate culvert mouth structure and cap stones, 9, installation of a cover plate, 10, filling of settlement joint and cover plate joint materials, 11, filling of soil behind a layered backfilling platform and soil on the culvert top, and 12, forming of a roadbed. The following problems exist at present: 1. the bottom plate and the platform body structure of each segment of the slab culvert cannot be constructed in parallel due to the limitation of an operation working surface, the construction period of the cast-in-place slab culvert is long, and the construction quality guarantee rate is low; 2. the cast-in-place concrete needs watering maintenance, accumulated water is easy to soak the foundation soil, and the bearing capacity of the foundation is reduced; 3. the construction of the cast-in-place slab culvert needs more temporary stockyards, workers and templates, the use efficiency of machines is lower, and more temporary yards are occupied; 4. the cast-in-place concrete needs more transport vehicles, and the traffic organization of the sidewalk is difficult and easy to cause environmental pollution.

Patent CN201910344851.0 discloses a construction process of a slab culvert, which mainly discloses a construction process with installation size, and the construction is performed by using a cast-in-place method, and has no reference meaning according to the change of construction sites. The existing assembled type slab culvert, for example, patent CN201710063597.8 discloses a U-shaped assembled reinforced concrete slab culvert and a construction method thereof, the method of combining prefabrication and cast-in-place construction is adopted, a bottom plate of the culvert adopts cast-in-place, the condition that cracks are generated between cast-in-place concrete and prefabricated concrete due to different contraction is not considered, and then the water seepage phenomenon of the bottom plate occurs during operation, and the prefabricated slab is easy to be sheared and damaged by shearing force at the section mutation position.

Disclosure of Invention

The invention aims to provide a main body structure of an assembled plate culvert, which aims to solve the problems of low construction efficiency and uneven construction and maintenance quality of the conventional plate culvert.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a major structure is contained to assembled apron, includes prefabricated bottom plate, prefabricated platform body and prefabricated apron, pre-buried anchor bolt that has in the bottom plate, the platform body bottom is provided with base skeleton steel sheet, base side steel sheet, stiffening steel sheet and rectangle twisted steel, base skeleton steel sheet passes through double-deck nut with anchor bolt and is connected, be provided with the pre-buried bolt that is used for installing the hoist on the platform body, the apron sets up on the stage hat of platform body upper end, base skeleton steel sheet below is provided with the viscose steel glue film, the one side of falling water of platform body bottom is provided with the stainless steel case lid, the one side of falling water base skeleton steel sheet and base side steel sheet holding in the stainless steel case lid.

Based on the main structure of the fabricated plate culvert, the invention discloses a construction method of the main structure of the fabricated plate culvert, which comprises the following steps:

s1, construction preparation, namely judging whether the elevation and the design size of an inlet and an outlet of the plate culvert meet the actual requirements or not according to a design drawing and the actual terrain and geological conditions of a site, preparing materials and equipment required by the assembled plate culvert, determining a material stacking, prefabricating and hoisting site, and hardening a corresponding transportation sidewalk;

s2, partitioning the slab culvert structure according to the segmentation requirements of the design drawing, synchronously prefabricating the slab culvert in a prefabricating yard when constructing the roadbed, and numbering and storing after pre-assembling;

s3, construction lofting, foundation pit construction, leveling of a construction site and making temporary drainage measures;

s4, paving and leveling a gravel cushion;

s5, conveying the prefabricated bottom plate to a construction site, installing the prefabricated bottom plate according to the number, compacting backfill materials on the side of the bottom plate, reserving a settlement joint, welding a platform body installation guide frame on the bottom plate embedded steel plate, and installing a platform body temporary support;

s6, transporting the prefabricated platform body to a construction site, installing a slab culvert platform body overhanging structure and a hanging point, hoisting the platform body structure on a platform body temporary support according to the number, arranging a three-dimensional jack temporary support under the platform body overhanging structure, and installing a three-dimensional jack;

s7, vertically jacking a three-dimensional jack, finely adjusting the position of a prefabricated platform body on a plane, spraying high-strength viscose glue after bolt holes of a bottom steel plate of a base of the platform body are aligned with pre-buried anchor bolts of a bottom plate, uniformly smearing the high-strength viscose glue when the temporary support of the platform body is moved out from one side by using the self weight of the temporary support of the platform body, vertically and slowly retracting the three-dimensional jack, installing an anchor bolt backing plate, a double-layer nut and a protection bolt, and dismantling a platform body installation guide frame, the three-dimensional jack and the temporary support of the three-dimensional jack;

s8, after polyurethane foaming glue is sprayed around the periphery of the embedded bolt gasket of the bottom plate, a stainless steel protective cover of the anchor bolt is installed, an anti-scouring stainless steel box cover is welded on the base framework steel plate on the side close to water, and polyurethane foaming glue is sprayed in a gap for sealing;

s9, circularly constructing a cover plate culvert bottom plate and a platform body, and installing a prefabricated cover plate;

s10, constructing a cover plate culvert opening structure and cap stones;

s11, filling settlement joint and cover plate joint materials;

s12, filling soil behind the layered backfilling platform and filling soil on the top of the culvert;

and S13, forming the roadbed.

Preferably, the thickness of the high-strength steel adhesive is 3-5mm, and the initial setting time is more than 1 hour. Compared with the existing pouring, the assembly type construction method has the following advantages:

1. only a small amount of anti-cracking reinforcing steel bars need to be arranged in the prefabricated platform body, and the compression resistance of concrete is fully utilized;

2. high-strength steel adhesive is coated at the joint of the steel plate between the platform body and the bottom plate, so that water seepage channels between the steel plates are reduced, and water seepage of the cover plate culvert during operation is avoided;

3. concrete does not need to be poured in the construction site, and shrinkage cracks and water seepage caused by age difference between the precast concrete and the cast-in-place concrete are avoided;

4. the self stability of the prefabricated components of the platform body and the bottom plate is good, and the anti-overturning capability is strong.

Compared with the prior art, the invention has the beneficial effects that:

1. the factory prefabricated cover plate culvert bottom plate, the platform body and the cover plate have high construction quality guarantee rate, and meanwhile, a batch of industrialized workers are cultivated, so that the working environment of constructors is improved, and a foundation is laid for intelligent green building production;

2. when the roadbed is paved, the main components of the slab culvert are prefabricated, so that the construction period is shortened;

3. the maintenance work of the prefabricated parts is completed in the prefabricated field, the maintenance condition is good, the maintenance water is less and can be recycled, the watering maintenance is not needed in the construction field, and the influence on the bearing capacity of the culvert bottom foundation is small;

4. only the hoisting position of the prefabricated structure is reserved, the construction pavement traffic organization is simple, and the environmental pollution is not easy to generate;

5. concrete is not required to be cast in situ in a construction site, existing hoisting equipment and transportation equipment in the construction site are utilized to the maximum extent, and the economic benefit of the whole project is improved;

6. adopt assembled major structure further to be favorable to apron to contain flowing water construction, improve the efficiency of construction.

Drawings

FIG. 1 is a schematic view of the overall structure of the assembled plate culvert body structure of the present invention;

FIG. 2 is a schematic top view of the main structure of the fabricated plate culvert of the present invention;

FIG. 3 is a schematic structural view of a stainless steel box cover of the main structure of the fabricated plate culvert of the invention;

FIG. 4 is a schematic axial view of the base framework of the main structure of the fabricated plate culvert of the present invention;

FIG. 5 is a schematic view of the main structure of the fabricated plate culvert of the present invention;

FIG. 6 is a second schematic view of the construction of the main structure of the fabricated plate culvert of the present invention;

FIG. 7 is a third schematic view of the main structure of the fabricated plate culvert of the present invention;

FIG. 8 is a fourth schematic view of the construction of the main structure of the fabricated plate culvert of the present invention;

FIG. 9 is a fifth schematic view of the main structure of the fabricated plate culvert of the present invention;

FIG. 10 is a sixth schematic view of the construction of the main structure of the fabricated plate culvert of the present invention.

Reference numerals: 1. a base plate; 2. a platform body; 3. a cover plate; 4. an anchor bolt; 5. a base skeleton steel plate; 6. a base side steel plate; 7. a stiffened steel plate; 8. a double-layer nut; 9. a stainless steel protective cover; 10. a stainless steel case cover; 11. pre-burying a steel plate; 12. installing a guide frame; 13. embedding bolts in the platform body; 14. backfilling materials; 151. temporarily supporting the platform body; 152. a jack is used for temporary support; 16. a platform body overhanging structure; 17. lifting points of the platform body; 18. a three-dimensional jack; 19. rectangular twisted steel.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, major structure is contained to assembled apron of this embodiment, including prefabricated bottom plate 1, prefabricated platform body 2 and prefabricated apron 3, pre-buried anchor bolt 4 that has in the bottom plate 1, 2 bottoms of platform body are provided with base skeleton steel sheet 5, base side steel sheet 6, stiffening steel sheet 7 and rectangle twisted steel 19, base skeleton steel sheet 5 passes through double-deck nut 8 with anchor bolt 4 and is connected, be provided with the platform body embedded bolt 13 that is used for installing the hoist on the platform body 2, apron 3 sets up on the stage cap of platform body 2 upper end, base skeleton steel sheet 5 below is provided with the viscose glue film, the side of falling water of platform body 2 bottom is provided with stainless steel case lid 10, the side of falling water base skeleton steel sheet 5 and the holding of base side steel sheet 6 are in stainless steel case lid 10. The rectangular spiral steel bar is used for anchoring the base steel plate and providing tensile resistance when the platform body is hoisted, concrete cracking during hoisting is prevented, and the rectangular spiral steel bar and the steel plate base are made in advance and are an integral component.

Example 2

Some steps are conventional means, which are not described herein, and the following are the main steps of the present invention.

As shown in fig. 5, installing a slab culvert bottom plate 1, compacting backfill materials 14 on one side of the processing bottom plate 1, installing a platform body temporary support 151, and welding a platform body installation guide frame 12; the platform body supports 151 temporarily and welds for circular stiffening steel sheet, highly about 13cm, and the dead weight is no longer than 25 kilograms, and the roof limit sets up the perforation otic placode, supports vertical fixed temporarily with the bilayer through the bolt. This facilitates the carrying and mounting of the temporary platform support 151.

As shown in fig. 6 and 7, a temporary support 152 of the jack is installed, the jack is fixed vertically by bolts, then the three-dimensional jack 18 is installed, the three-dimensional jack 18 vertically abuts against the cantilever structure 16 of the platform body, after the synchronous fine adjustment stability and safety of the platform body 2 are verified, the position of the platform body 2 is finely adjusted in a plane manner, after bolt holes of a bottom steel plate 5 of the platform body 2 are aligned with anchor bolts 4 pre-embedded in the bottom plate 1, high-strength adhesive steel is sprayed, and when the temporary support 15 of the platform body is moved out from one side, the self weight of the temporary support 151 of the platform body is utilized to uniformly wipe the high-strength adhesive steel;

as shown in fig. 8, the three-dimensional jack 18 is slowly and vertically retracted, after the platform body 2 is installed in place, the double-layer nut 8 is installed on the anchoring bolt 4, the protection bolt is inserted, and the platform body installation guide frame 12 is removed; a hole is punched in advance in the anchoring bolt rod, and a stainless steel protective bolt is inserted after a nut is screwed on. Preventing looseness.

As shown in fig. 9 and 10, the cantilever structure 16 of the slab culvert body is removed, the three-dimensional jack 18 is removed, the jack temporary support 152 is removed, the stainless steel protective cover 9 is installed after polyurethane foaming glue is sprayed around the periphery of the embedded bolt gasket of the bottom plate, the anti-scouring stainless steel box cover 10 is welded on the steel plate of the base framework on the side close to water, and polyurethane foaming glue is sprayed in gaps for sealing;

and after the bottom plate and the platform body of the plate culvert are constructed in a circulating manner, the plate culvert prefabricated plate is installed, the protective rubber sleeves are installed on the exposed screws on the two sides of the platform body embedded bolts 13, the settlement joint and the cover plate joint are filled with asphalt bast fibers, and the main structure installation of the assembled plate culvert is completed. I.e. the structure shown in fig. 1 is obtained.

The construction method has the following advantages:

1. the factory prefabricated cover plate culvert bottom plate, the platform body and the cover plate have high construction quality guarantee rate, and meanwhile, a batch of industrialized workers are cultivated, so that the working environment of constructors is improved, and a foundation is laid for intelligent green building production;

2. when the roadbed is paved, the main components of the slab culvert are prefabricated, so that the construction period is shortened;

3. the maintenance work of the prefabricated parts is completed in the prefabricated field, the maintenance condition is good, the maintenance water is less and can be recycled, the watering maintenance is not needed in the construction field, and the influence on the bearing capacity of the culvert bottom foundation is small;

4. only the hoisting position of the prefabricated structure is reserved, the construction pavement traffic organization is simple, and the environmental pollution is not easy to generate;

5. concrete is not required to be cast in situ in a construction site, existing hoisting equipment and transportation equipment in the construction site are utilized to the maximum extent, and the economic benefit of the whole project is improved;

6. adopt assembled major structure further to be favorable to apron to contain flowing water construction, improve the efficiency of construction. Compared with the mode of combining the assembly type injection and the cast-in-place injection in the prior art, the method has the following advantages:

1. only a small amount of anti-cracking reinforcing steel bars need to be arranged in the prefabricated platform body, and the compression resistance of concrete is fully utilized;

2. high-strength steel adhesive is coated at the joint of the steel plate between the platform body and the bottom plate, so that water seepage channels between the steel plates are reduced, and water seepage of the cover plate culvert during use is avoided;

3. concrete does not need to be poured in the construction site, so that age-related shrinkage crack water seepage between the precast concrete and the cast-in-place concrete is avoided;

4. the self stability of the prefabricated components of the platform body and the bottom plate is good, and the anti-overturning capability is strong.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.