CN215329316U

CN215329316U - Pier is assembled in horizontal piecemeal prefabrication based on wet seam

Info

Publication number: CN215329316U
Application number: CN202120947806.7U
Authority: CN
Inventors: 明发焱; 曾敏; 文望青; 严爱国; 杜振华; 沈哲亮; 张宪国; 杨勇; 付小军; 蔡泽; 赵月悦; 朱勤英才; 武兵; 许三平; 张玲
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-12-28
Anticipated expiration: 2031-05-06

Abstract

The utility model relates to the field of bridge engineering, and particularly provides a wet joint based transverse block prefabricated assembled pier which comprises two prefabricated sections which are transversely and symmetrically distributed, wherein bearing platforms are connected below the prefabricated sections, wet joints are reserved among the prefabricated sections, transverse embedded rectangular steel bars are arranged in the prefabricated sections, and the transverse embedded rectangular steel bars are arranged in a layered and staggered manner and connected in the wet joints through pouring. Compared with the vertical section of the traditional common prefabricated bridge pier, the vertical section prefabricated bridge pier reduces the tedious work of positioning, matching and the like, is simple to operate, and can be synchronously constructed by vertical joints after the pier bottom is matched with the bearing platform in place, thereby saving the construction period; in addition, the concrete is cast in situ at the center of the structural section, so that the connection performance is better, the strength and the ductility of the structure are improved, and the strong competitiveness is realized.

Description

Pier is assembled in horizontal piecemeal prefabrication based on wet seam

Technical Field

The utility model relates to the field of bridge engineering, in particular to a transverse block prefabricated assembled pier based on wet joints.

Background

The conventional pier assembly type is limited to the weight of a member except for considering the connection between a pier bottom and a bearing platform, the conventional pier assembly type is further segmented in the height direction, and the joint connection mode is the most common mode of grouting sleeve or grouting metal corrugated pipe connection.

The grouting sleeve or the grouting metal corrugated pipe is adopted for connection, and the grouting metal corrugated pipe has the advantages of good mechanical property of a connection part, wide market application and mature technology. However, this method has the following disadvantages:

1) in the construction process, high-precision splicing is strictly needed, construction control is strict, and operation is complex.

2) The grouting technology of the grouting sleeve is high in requirement, the hidden danger of incomplete grouting or incompact grouting exists, and the safety performance of the joint is affected.

3) The concrete joint section has poor mechanical continuity and structural ductility due to the difference of the two materials.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a transverse block prefabricated assembly pier based on wet joints.

The utility model provides a wet joint based transverse block prefabricated assembled pier which comprises two prefabricated sections which are transversely and symmetrically distributed, wherein bearing platforms are connected below the prefabricated sections, wet joints are reserved between the prefabricated sections, transverse embedded rectangular steel bars are arranged in the prefabricated sections, and the transverse embedded rectangular steel bars are arranged in a layered and staggered manner and connected in the wet joints through pouring.

Optionally, the prefabricated segments are connected through wet joints, pier vertical steel bars are arranged in the wet joints, and the pier vertical steel bars are embedded through bearing platforms and can be lengthened.

Optionally, the outer sides of the prefabricated segments are directly spliced and matched, and a wet joint pouring template is formed at the spliced position.

Optionally, the prefabricated sections and the bearing platform are connected by cast-in-place concrete or grouting sleeves or grouting metal bellows.

Optionally, the wet seam is 50cm wide.

Optionally, the post-cast concrete in the wet joint is compensated shrinkage concrete.

Optionally, the prefabricated sections are provided with a semi-hollow structure, and the two prefabricated sections are spliced to form a complete hollow structure.

The utility model has the following beneficial effects:

1. compared with the vertical section of the traditional common prefabricated bridge pier, the vertical section prefabricated bridge pier reduces the tedious work of positioning, matching and the like, is simple to operate, and can be synchronously constructed by vertical joints after the pier bottom is matched with the bearing platform in place, thereby saving the construction period; in addition, the concrete is cast in situ at the center of the section of the structure, so that the connection performance is better, the strength and the ductility of the structure are improved, and the concrete has strong competitiveness and better economic benefit.

2. The prefabricated concrete pier structure has the advantages of good structural connection performance, safety, reliability, good durability and ductility, convenience in construction, lower manufacturing cost and good economy, and can be popularized and applied to all prefabricated concrete piers.

3. The precision requirement of beam section manufacturing and installation is reduced, and the construction process is simple and convenient to implement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an overall arrangement diagram of prefabricated pier segments in the utility model;

FIG. 2 is a schematic view of the vertical-side reinforcement distribution of the transverse rectangular reinforcing bars of the present invention;

FIG. 3 is a schematic view of an assembled cross section in embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of the arrangement of reinforcing bars in the assembled cross section in embodiment 1 of the present invention;

FIG. 5 is a schematic view of a spliced cross section in embodiment 2 of the present invention;

fig. 6 is a schematic diagram of reinforcement distribution of the assembled cross section in embodiment 2 of the present invention.

In the figure: 1-prefabricating a segment; 2-wet seaming; 3-a cushion cap; 4-transversely pre-burying rectangular steel bars; 5-vertical steel bars; 6-prefabricating a segment splicing section.

Detailed Description

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.

Referring to fig. 1, an embodiment of the present invention provides a wet joint based transverse block prefabricated pier, which includes two prefabricated segments 1 that are transversely and symmetrically distributed, a wet joint 2 is reserved between the prefabricated segments 1, a bearing platform 3 is connected below the prefabricated segments 1, and the prefabricated segments 1 and the bearing platform 3 may be connected by cast-in-place concrete or a grouting sleeve or a grouting metal corrugated pipe (fig. 1 shows a cast-in-place concrete manner). Referring to fig. 2, all be equipped with horizontal pre-buried rectangle reinforcing bar 4 in the prefabricated section 1, the crisscross setting of layering is and through pouring the connection in wet seam 2 between horizontal pre-buried rectangle reinforcing bar 4, and the reinforcing bar need not welding or ligature, and the good integrality of structure just can be ensured to direct concreting in wet seam 2.

The width of the wet joint 2 is 50cm, and the compensation shrinkage concrete is cast in the wet joint 2 in situ, so that the method is suitable for various piers such as Y-shaped piers, vase piers and the like.

The prefabricated sections 1 are provided with semi-hollow structures, and the two prefabricated sections 1 are spliced to form a complete hollow structure. This pier is assembled in prefabrication can be made half as required and be hollow (to piecing together back pier cross-section center and forming complete hollow) to further reduce 1 weight of single prefabricated segment, to the requirement of machines and tools when reducing transportation, hoist and mount.

In the pouring process of the wet joint 2, according to the different matching modes of the prefabricated sections 1, two modes are adopted:

the method comprises the steps of producing prefabricated sections 1 in a factory or on site → storing the prefabricated sections 1 of the piers for more than 2-3 months → transporting to a bridge site for on-site hoisting → splicing in place → connecting a pier bottom with a bearing platform 3 (sleeve or cast-in-place) → lengthening vertical seam steel bars (in the embodiment 2, the step can be omitted) → arranging outside seam formworks (in the embodiment 2, the step can be omitted) → pouring inside seam compensation shrinkage concrete → curing and formwork removal of concrete → constructing the next prefabricated pier, and the steps are circulated.

1. Compared with the vertical section of the traditional common prefabricated bridge pier, the vertical section prefabricated bridge pier reduces the tedious work of positioning, matching and the like, is simple to operate, and can be synchronously constructed by vertical joints after the pier bottom is matched with the bearing platform 3 in place, thereby saving the construction period; in addition, the concrete is cast in situ at the center of the section of the structure, so that the connection performance is better, the strength and the ductility of the structure are improved, and the concrete has strong competitiveness and better economic benefit.

Example 1:

a transverse block prefabricated assembled pier based on wet joints comprises two prefabricated sections 1 which are transversely and symmetrically distributed, wet joints 2 are reserved between the prefabricated sections 1, a bearing platform 3 is connected below the prefabricated sections 1, and the prefabricated sections 1 and the bearing platform 3 can be connected through cast-in-place concrete or grouting sleeves or grouting metal corrugated pipes (the cast-in-place concrete mode is shown in figure 1). Referring to fig. 2, all be equipped with horizontal pre-buried rectangle reinforcing bar 4 in the prefabricated section 1, the crisscross setting of layering is and through pouring the connection in wet seam 2 between horizontal pre-buried rectangle reinforcing bar 4, and the reinforcing bar need not welding or ligature, and the good integrality of structure just can be ensured to direct concreting in wet seam 2.

Referring to fig. 3 and 4, the prefabricated sections 1 are connected through the wet joints 2, the outer sides of the prefabricated sections 1 are not in direct contact, pier vertical steel bars 5 are arranged in the wet joints 2 for structural stability, and the pier vertical steel bars 5 are embedded in the bearing platforms 3 and can be elongated.

Example 2:

Referring to fig. 5 and 6, the outer sides of the prefabricated sections 1 are directly spliced and matched, the prefabricated section splicing sections 6 form a wet joint pouring template, the pouring of the wet joint 2 is protected, the module cost can be saved, and the vertical steel bars 5 can be omitted from being lengthened on the bearing platform 3.

Traditional pier founds direction of height merogenesis seam adopts grout sleeve or grout corrugated metal pipe, and location, matching working strength are high, and the operation degree of difficulty is big, and this prefabrication is assembled pier perps and is cast-in-place construction, simple process, and the operation degree of difficulty is low, and wet seam is located structure cross-section center (avoids weak position), and cast-in-place concrete is inorganic non-metallic material, and structural durability, ductility are good, adopt conventional concrete material, and the cost is low, and economic nature is good.

Compared with the vertical section of the traditional common prefabricated pier, the method has the advantages that the tedious work of positioning, matching and the like is reduced, the operation is simple, in addition, after the pier bottom and the bearing platform are matched and positioned, the vertical joint synchronous construction can be realized, and the construction period is saved; in addition, the concrete is cast in situ at the center of the structural section, so that the connection performance is better, the strength and the ductility of the structure are improved, and the strong competitiveness is realized. The method can be popularized and applied to all precast concrete piers.

(1) The process is simple and convenient to operate. The joint seam of the traditional pier constructed in the height direction adopts a grouting sleeve or a grouting metal corrugated pipe, so that the positioning and matching working strength is high, and the operation difficulty is high. The vertical seam of the prefabricated assembled pier is cast-in-place construction, the process is simple, and the operation difficulty is low.

(2) After the pier bottom and the bearing platform are matched in place, pouring construction can be synchronously performed between the vertical joints, and the construction period is shortened.

(3) In the vertical joint seam, the longitudinal steel bars can be embedded by the bearing platform and are conventionally lengthened, the transverse steel bars are connected by welding or binding to realize the continuity of the common steel bars, the pouring and connecting quality is better ensured, and the structural integrity is good. Or the vertical main rib is lengthened by canceling the vertical joint bearing platform, and the outer side of the prefabricated pier is directly aligned and connected and is also used as a vertical joint pouring template, so that the template cost is saved.

(4) The cast-in-place seam is made of conventional concrete materials, so that the cost is low and the economy is good.

(5) The cast-in-place seam is located the structure cross-section center (avoids weak position), and cast-in-place concrete is inorganic non-metallic material, and structural durability, ductility are good.

(6) In order to reduce the weight of the pier component, the section can be further made into a half-edge hollow (the center of the section of the pier after splicing forms a complete hollow), so that the weight of a single prefabricated section is further reduced, and the requirements on machines and tools during transportation and hoisting are reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a pier is assembled in horizontal piecemeal prefabrication based on wet seam which characterized in that, including two prefabricated sections of horizontal symmetric distribution, the cushion cap is connected to prefabricated section below, has reserved wet seam between the prefabricated section, all is equipped with horizontal pre-buried rectangle reinforcing bar in the prefabricated section, and the layering is crisscross to be set up between the horizontal pre-buried rectangle reinforcing bar and through pouring the connection in wet seam.

2. The wet joint based transverse segmented precast pier as claimed in claim 1, wherein: the prefabricated segments are connected through wet joints, pier vertical reinforcing steel bars are arranged in the wet joints, and the pier vertical reinforcing steel bars are embedded in the bearing platforms and can be lengthened.

3. The wet joint based transverse segmented precast pier as claimed in claim 1, wherein: the outer sides of the prefabricated sections are directly spliced and matched, and a wet joint pouring template is formed at the splicing position.

4. The wet joint based transverse segmented precast pier as claimed in claim 2 or 3, wherein: the prefabricated sections are connected with the bearing platform through cast-in-place concrete or grouting sleeves or grouting metal corrugated pipes.

5. The wet joint based transverse segmented precast pier as claimed in claim 4, wherein: the wet seam was 50cm wide.

6. The wet joint based transverse segmented precast pier as claimed in claim 1, wherein: and the post-pouring concrete in the wet joint adopts compensation shrinkage concrete.

7. The wet joint based transverse segmented precast pier as claimed in claim 1, wherein: the prefabricated sections are provided with semi-hollow structures, and the two prefabricated sections are spliced to form a complete hollow structure.