CN113463499A - Prefabricating device capable of accurately positioning integrated pier and capping beam and construction method - Google Patents

Abstract

The invention discloses a prefabricating device and a construction method of an integral pier and capping beam capable of accurately positioning, wherein the prefabricating device comprises an operation foundation pit, a first set of positioning tools are pre-embedded in the operation foundation pit, an auxiliary tool for prefabricating the integral pier and capping beam is further arranged in the operation foundation pit, the first set of positioning tools are provided with first positioning holes matched with main piers in a one-to-one mode, the integral pier and capping beam are prefabricated according to the first set of positioning tools, the main piers expose at least one anchoring length, a bearing platform of a bridge construction site is provided with a second set of positioning tools, the second set of positioning tools are provided with second positioning holes corresponding to all the first positioning holes of the first set of positioning tools, and the prefabricated integral pier and the main piers on the capping beam can correspond to the second positioning holes of the second set of positioning tools in a one-to-one mode. The pier and the bent cap are integrally prefabricated and can be quickly connected with the bearing platform in an aligned mode, the site construction time is shortened, the construction efficiency is improved, and the consumption is reduced.

Description

Prefabricating device capable of accurately positioning integrated pier and capping beam and construction method

Technical Field

The invention belongs to the technical field of civil engineering, and particularly relates to a prefabricating device of an integral pier and capping beam capable of being accurately positioned and a construction method of a bridge.

Background

With the vigorous development of bridge construction in China, the construction environment of bridges is more and more emphasized by governments, owners, design and construction units, especially bridges constructed in cities. By adopting the traditional construction method mainly based on cast-in-place concrete, the bridge site ground is inevitably used as a construction site, traffic is blocked for a long time, construction noise cannot be effectively controlled, construction equipment and auxiliary facilities need to be repeatedly configured, and the problems of large resource and energy consumption, much financial and material waste and the like are caused. On the premise of ensuring the engineering quality, the method reduces the on-site concrete pouring engineering quantity, the construction occupied area and the construction period as much as possible, and ensures that the bridge construction is more environment-friendly, less in interference, safer, high in quality and low in consumption, thereby being a problem to be solved.

The fully prefabricated bridge structure is an effective means for accelerating construction speed, reducing field pollution and realizing low-carbon construction. The fully prefabricated bridge is a bridge which is formed by collectively prefabricating and assembling main components of upper and lower structures of a concrete bridge in a factory or a prefabricating field. Wherein, the capping beam, the pier column, the foundation pile and the like of the bridge pier of the bridge lower structure are taken as basic components and are integrally prefabricated or sectionally prefabricated according to the size of the basic components.

With the rapid development of highway construction in China, the assembly construction is more and more used for the rapid construction of bridges, and the problems of environmental restriction, engineering progress and the like are smoothly solved by adopting a prefabrication and assembly technology. At present, piers and capping beams are separately prefabricated at home, the piers and a bearing platform are prefabricated and assembled firstly, and then the capping beams and the piers are prefabricated and assembled, so that the assembly needs to be carried out twice. For example, in the Shanghai S3 highway engineering, a construction process of prefabricating piers and prefabricated capping beams, wherein the piers and the capping beams are respectively adopted, the piers are in assembly connection with a bearing platform, and the capping beams are in assembly connection with the piers.

Disclosure of Invention

One of the purposes of the invention is to provide the prefabricating device of the integral pier and the capping beam, which can accurately position, integrally prefabricate the pier and the capping beam and reduce the field construction time.

The prefabricating device comprises an operation foundation pit, a first set of positioning tool is pre-buried in the operation foundation pit, the operation foundation pit is further provided with an auxiliary tool for prefabricating the integral pier and the capping beam, the first set of positioning tool is provided with first positioning holes matched with main piers in a one-to-one mode, the first set of positioning tool is prefabricated integral pier and the capping beam, the main piers of the piers expose at least one anchoring length, bearing platforms of bridge construction sites are preset with a second set of positioning tool, the second set of positioning tool is provided with second positioning holes corresponding to all the first positioning holes of the first set of positioning tool, and main piers of the integral pier and the capping beam which are prefabricated can be in one-to-one correspondence with the second positioning holes of the second set of positioning tool.

According to the prefabricated integral pier and capping beam, the position of the main pier rib is positioned by the first set of positioning tool during prefabrication, and the main pier rib can be accurately aligned with the second positioning hole of the second set of positioning tool on the bearing platform in the process of butt joint with the bearing platform on site, so that the main pier rib can be smoothly installed on the bearing platform, the difficulty of site construction is reduced, and the construction efficiency is improved.

As a preferred design of the invention:

the second set of positioning tool is provided with two surface layers which are parallel to each other, and second positioning holes of the upper surface layer and the lower surface layer are correspondingly arranged in the vertical direction one by one and used for installing grouting sleeves in a matching mode.

The grouting sleeve is a semi-grouting sleeve, the lower end of the semi-grouting sleeve is in mechanical threaded connection with the main rib of the bearing platform, and the main rib of the pier is inserted into the rear grouting connection at the upper end of the semi-grouting sleeve.

The pier of the integral pier and the capping beam is an oblique plate pier or an orthogonal plate pier or a cylindrical pier, and can be a single-column pier or a multi-column pier.

The pier of the integral pier and the capping beam is of a reinforced concrete structure.

The capping beam of the integral pier and capping beam is in a reinforced concrete structure or a prestressed concrete structure.

The invention also aims to provide a bridge construction method using the integral pier and the capping beam capable of being accurately positioned, which comprises the following steps:

s1, arranging an operation foundation pit in a prefabricated site, and embedding a first set of positioning tool in the operation foundation pit;

s2, fixing the main pier reinforcements in first positioning holes of the first set of positioning tools to complete construction of the pier reinforcement framework, and then pouring a pier body of the pier;

s3, pouring the bent cap to realize integral prefabrication of the integral pier and the bent cap;

s4, separating the integral pier from the bent cap and the first set of positioning tool, and transporting the integral pier and the bent cap to a bridge construction site;

s5, after the pile foundation of the bridge construction site is finished, carrying out bearing platform construction, and when a steel reinforcement framework of the bearing platform is bound, mechanically connecting the main reinforcement of the bearing platform with a grouting sleeve, wherein the grouting sleeve is arranged in a second positioning hole of a second set of positioning tool, embedding the second set of positioning tool into the poured bearing platform, and extending a grouting pipe of the grouting sleeve out of the bearing platform;

and S6, moving the integral pier and the capping beam to the position above the bearing platform, inserting the pier main ribs exposed out of the pier into a grouting sleeve of the bearing platform, and grouting slurry through the grouting pipe to complete connection of the pier and the bearing platform.

The integral pier and the capping beam can be transported by a self-propelled modular transport vehicle, namely an SPMT modular vehicle.

The invention has the following beneficial effects:

1. the pier and the capping beam are integrally prefabricated, the main pier rib is positioned by the first set of positioning tool in the prefabrication process, the main pier rib can be accurately aligned with the second positioning hole of the second set of positioning tool on the bearing platform in the field butt joint process with the bearing platform, so that the main pier rib can be smoothly installed on the bearing platform, the high-precision connection between the pier and the bearing platform is ensured by the two sets of positioning tools which are completely consistent or correspond to the positioning holes, and the construction difficulty is reduced.

2. The speed of the assembly construction is accelerated, the on-site concrete pouring engineering quantity is reduced, the construction occupied area and the construction period are reduced, and the bridge construction is more environment-friendly, less in interference, safer, low in consumption and high in quality.

Drawings

FIG. 1 is a schematic view of an operation foundation pit for prefabricating an integral pier and capping beam according to the present invention;

fig. 2 is a schematic view of the integrated pier and capping beam of fig. 1 after prefabrication is completed;

FIG. 3 is a schematic view of the construction of the bearing platform according to the embodiment of the present invention;

FIG. 4 is a schematic view of a bridge after construction is completed according to an embodiment of the present invention;

FIG. 5 is a schematic view showing the connection of the main pier ribs, the second set of positioning tools and the main bearing platform ribs;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic view showing the connection of the pier main ribs, the grouting sleeves and the bearing platform main ribs;

FIG. 8 is a perspective view of a second set of positioning tools of the present invention;

FIG. 9 is a schematic view of the second set of positioning tools of FIG. 8 coupled to a grout sleeve;

fig. 10 is a top view of fig. 9.

Description of reference numerals: 1-operating a foundation pit, 2-a first set of positioning tools, 3-auxiliary tools, 4-piers, 4 a-pier main ribs, 5-capping beams and 6-pile foundations; 7-bearing platform foundation pit; 8-a support frame; 9-a second set of positioning tools; 10-grouting sleeve; 11-a cushion cap; 11 a-bearing platform main ribs, 12-boundary cushion layers and 13-vertical adjusting tools.

Detailed Description

The technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples, so that those skilled in the art can better understand and implement the technical solutions of the present invention.

As shown in fig. 1 to 10, the present embodiment will explain the present invention in detail by taking a bridge of a skew plate type pier as an example,

as shown in fig. 1 and 2, the prefabricating device of integral pier and bent cap includes operation foundation ditch 1, pre-buried first set of positioning tool 2 in the operation foundation ditch 1, operation foundation ditch 1 still is provided with appurtenance 3 that is used for prefabricating integral pier 4 and bent cap 5, first set of positioning tool 2 is seted up with the first locating hole of pier owner muscle 4a one-to-one matching, prefabricated integral pier and bent cap according to first set of positioning tool 2, expose at least one anchor length in order to satisfy the anchor connection requirement behind the first locating hole that makes pier owner muscle 4a pass first set of positioning tool 2.

As shown in fig. 3 and 4, a second set of positioning tools 9 is preset on a bearing platform 11 of a bridge construction site, and the second set of positioning tools 9 are provided with second positioning holes corresponding to all the first positioning holes of the first set of positioning tools 2, in this embodiment, the first set of positioning tools 2 and the second set of positioning tools 9 have completely the same structure, so that the prefabricated integral pier 4 and the pier main ribs 4a on the capping beam 5 can correspond to the second positioning holes of the second set of positioning tools 9 one by one.

As a preferred embodiment:

as shown in fig. 5 to 10, the second set of positioning tools 9 is provided with two parallel surface layers, i.e. an upper surface layer 9a and a lower surface layer 9b, and second positioning holes of the upper and lower surface layers are correspondingly arranged in the vertical direction one by one for matching and installing the grouting sleeve 10, wherein the diameter of the second positioning hole on the upper surface layer 9a is matched with the outer diameter of the grouting sleeve, and the diameter of the second positioning hole on the lower surface layer 9b is matched with the diameter of the bearing platform main rib 11a and is also matched with the diameter of the bearing platform main rib 4 a.

The grouting sleeve 10 is a half grouting sleeve, the lower end of the half grouting sleeve is in mechanical threaded connection with the bearing platform main rib 11a, and the pier main rib 4a is inserted into the upper end of the half grouting sleeve and then is in grouting connection.

In this embodiment, the pier 4 of the integral pier and capping beam is a reinforced concrete structure, and the capping beam 5 is a reinforced concrete structure or a prestressed concrete structure.

The bridge construction method of the invention comprises the following steps, wherein the construction of the pier 4 and the capping beam 5 and the construction of the bearing platform 11 can be carried out simultaneously:

s1, arranging an operation foundation pit 1 in a prefabricated site, and embedding a first set of positioning tool 2 in the operation foundation pit 1;

s2, fixing the pier main reinforcement 4a in a first positioning hole of the first set of positioning tool 2, completing construction of a steel reinforcement framework of the pier 4, and then pouring a pier body of the pier;

s3, pouring the bent cap 5 to realize integral prefabrication of the integral pier and the bent cap;

s4, separating the integral pier 4 from the bent cap 5 and the first set of positioning tool 2, and transporting the integral pier and the bent cap to a bridge construction site, wherein the transportation can be carried by a self-propelled module transport vehicle, namely an SPMT module vehicle;

s5, after the pile foundation 6 of the bridge construction site is finished, constructing a bearing platform foundation pit 7, constructing a bearing platform 11, and when a reinforcement framework of the bearing platform 11 is bound, mechanically connecting a bearing platform main rib 11a with a grouting sleeve 10, installing the grouting sleeve 10 in a second positioning hole of a second set of positioning tool 9, as shown in figures 3 and 5, embedding the second set of positioning tool 9 into the poured bearing platform 11, extending a grouting pipe of the grouting sleeve 10 out of the bearing platform 11, wherein the second set of positioning tool 9 is installed on a support frame 8, and ensuring that the bearing platform main rib 11a of the reinforcement framework of the bearing platform 11 does not deviate through the second set of positioning tool 9;

and S6, moving the integral pier and the capping beam to the position above the bearing platform 11, inserting the pier main ribs 4a exposed out of the pier into the grouting sleeve 10 of the bearing platform 11, and grouting slurry through the grouting pipe to complete connection of the pier 4 and the bearing platform 11. A boundary pad 12 is arranged at the boundary between the pier 4 and the bearing platform 11, as shown in fig. 5 and 6. According to the invention, the pier 4 is prefabricated by adopting the first set of positioning tool 2, the first positioning holes of the first set of positioning tool 2 correspond to the second positioning holes of the second set of positioning tool 9 one by one, and the grouting sleeve 10 is arranged in the second positioning holes, so that the precision of the alignment connection between the pier main ribs 4a and the grouting sleeve 10 is high, and in the alignment process, all the pier main ribs 4a can be inserted into the grouting sleeve 10 by adjusting the verticality of the pier through the vertical adjusting tool 13, so that the construction efficiency is improved. Wherein, vertical adjustment tool 13 generally comprises regulation bracket and jack, for the prior art in bridge building field, does not describe here in any more detail.

The above-mentioned embodiments are merely preferred embodiments of the present invention, but should not be construed as limiting the invention, and any variations and modifications based on the concept of the present invention should fall within the scope of the present invention, which is defined by the claims.

Claims (8)

1. But prefabrication device of integral pier and bent cap of accurate positioning, including the operation foundation ditch, its characterized in that, pre-buried first set of positioning tool has in the operation foundation ditch, the operation foundation ditch still is provided with the appurtenance who is used for prefabricating integral pier and bent cap, first set of positioning tool set up with the first locating hole of pier owner muscle one-to-one matching, according to first set of positioning tool is prefabricated integral pier and bent cap, pier owner muscle exposes at least one anchor length, and the cushion cap of bridge construction scene has preset second set of positioning tool, second set of positioning tool set up with the second locating hole that all first locating holes of first set of positioning tool correspond, make the pier owner muscle on integral pier and the bent cap of prefabrication accomplish can the one-to-one the second set of positioning tool the second locating hole.

2. The prefabrication device of an accurately locatable integral pier and cap beam as claimed in claim 1, wherein: the second set of positioning tool is provided with two surface layers which are parallel to each other, and second positioning holes of the upper surface layer and the lower surface layer are arranged in a one-to-one correspondence mode in the vertical direction and used for matching and installing grouting sleeves.

3. The prefabrication device of an accurately locatable integral pier and cap beam as claimed in claim 2, wherein: the grouting sleeve is a semi-grouting sleeve, the lower end of the semi-grouting sleeve is in mechanical threaded connection with the bearing platform main rib, and the pier main rib is inserted into the rear grouting connection at the upper end of the semi-grouting sleeve.

4. The prefabrication device of an accurately locatable integral pier and cap beam as claimed in claim 3, wherein: the integral pier and the pier of the capping beam are oblique-crossing plate type piers or orthogonal plate type piers or cylindrical piers.

5. The prefabrication device of an accurately locatable integral pier and cap beam as claimed in claim 4, wherein: the integral pier and the pier of the bent cap are of reinforced concrete structures.

6. The prefabrication device of an accurately locatable integral pier and cap beam as claimed in claim 5, wherein: the capping beam of the integral pier and capping beam is of a reinforced concrete structure or a prestressed concrete structure.

7. A bridge construction method using the precisely positionable integral pier and capping beam according to any one of claims 1 to 6, comprising the steps of:

s1, arranging an operation foundation pit in a prefabricated site, and embedding a first set of positioning tool in the operation foundation pit;

s2, fixing the main pier reinforcements in first positioning holes of the first set of positioning tools to complete construction of the pier reinforcement framework, and then pouring a pier body of the pier;

s3, pouring the bent cap to realize integral prefabrication of the integral pier and the bent cap;

s4, separating the integral pier from the bent cap and the first set of positioning tool, and then transporting the integral pier and the bent cap to a bridge construction site;

s5, after the pile foundation of the bridge construction site is finished, carrying out bearing platform construction, and when a steel reinforcement framework of the bearing platform is bound, mechanically connecting the main reinforcement of the bearing platform with a grouting sleeve, wherein the grouting sleeve is arranged in a second positioning hole of a second set of positioning tool, embedding the second set of positioning tool into the poured bearing platform, and extending a grouting pipe of the grouting sleeve out of the bearing platform;

and S6, moving the integral pier and the capping beam to the position above the bearing platform, inserting the pier main ribs exposed out of the pier into a grouting sleeve of the bearing platform, and grouting slurry through the grouting pipe to complete connection of the pier and the bearing platform.

8. The bridge construction method according to claim 7, wherein the integral pier and the capping beam are moved by a self-propelled modular transporter.

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