CN110144830B - Bridge pier top rotation construction method - Google Patents
Bridge pier top rotation construction method Download PDFInfo
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- CN110144830B CN110144830B CN201910350447.4A CN201910350447A CN110144830B CN 110144830 B CN110144830 B CN 110144830B CN 201910350447 A CN201910350447 A CN 201910350447A CN 110144830 B CN110144830 B CN 110144830B
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- swivel
- main
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
Abstract
The invention discloses a bridge pier top swivel construction method, which comprises the following steps: constructing a main pier, an auxiliary pier, a capping beam and a cross brace of the main pier and the auxiliary pier; a swivel slide way is arranged on the auxiliary pier capping beam; the auxiliary pier cap beam is provided with a traction counter-force seat, a steering block and a jack counter-force seat; constructing a main beam of the swivel; a swivel support is arranged between the main pier capping beam and the main beam bottom; the bottom of the main beam is provided with a supporting leg and an anchoring device. During construction, the turning jack is arranged on the traction counter-force seat, two ends of the traction steel cable are respectively anchored on the turning jack and the anchoring device at the bottom of the turning main beam, the steel cable is in contact with the steering block guide wheel and the supporting leg, a rotating force coupler is formed after the turning jack is started, the turning support and the supporting leg are driven to slide on the slideway, so that the beam body is rotated, the auxiliary pier and the turning auxiliary device are detached after the main beam is rotated in place, and the turning support can be used as a permanent support. The construction method can greatly reduce the interference to the traffic under the bridge, and has high construction safety and low cost.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a bridge pier top rotating construction system and a bridge rotating construction method.
Background
The bridge pier top rotation construction refers to a construction method that after a bridge is cast or assembled and formed at a non-designed axis position, a rotation system arranged on the pier top rotates in place. In recent years, with the rapid development of traffic transportation in China, the construction of overpasses is increasingly increased, the influence of bridge pier top swivel construction on existing traffic under bridges can be reduced to the maximum extent, and the bridge pier top swivel construction method is widely applied. However, the traditional pier top swivel system has high requirement on the construction site manufacturing and mounting precision, long construction period, complex construction and operation process, small pier top operation space, poor landscape performance and poor safety, and has a lot of difficulties in practical application.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a bridge pier top rotating construction method which is simple in structure and manufacturing and construction process and good in safety.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a bridge pier top swivel construction method, which comprises the following steps:
step A1: the method comprises the following steps that two bridge main piers are arranged at intervals in front of and behind a set position, main pier capping beams are laid on the two bridge main piers in a through-length mode, a plurality of auxiliary piers are respectively and evenly arranged at intervals at two oppositely-arranged arc-shaped section positions which are constructed by taking the center of the main pier capping beam as the circle center and by using the same set radius, the auxiliary pier capping beams are laid on the auxiliary piers on each side in a through-length mode, and a plurality of transverse supports are respectively arranged between the main pier capping beams and the auxiliary pier capping beams on the two sides;
step A2: arc-shaped rotating body slide ways are respectively arranged on the top walls of the auxiliary pier capping beams on the two sides and corresponding to the positions of the supporting feet to be installed, and the arc centers of the arc-shaped rotating body slide ways are consistent with the center of the main pier capping beam;
step A3: respectively arranging traction reaction force seats at one end of the top wall of the auxiliary pier cap beam at two sides, wherein the two traction reaction force seats are arranged diagonally, respectively fixing a steering block on the top wall of the auxiliary pier cap beam at the inner side of each traction reaction force seat, and mounting a steering wheel on the steering block; a plurality of jack counter-force seats are respectively fixed on the top walls of the auxiliary pier capping beams at the inner sides and the outer sides of the two arc-shaped rotating body slide ways at intervals, wherein the plurality of jack counter-force seats at the inner sides and the plurality of jack counter-force seats at the outer sides respectively form an arc-shaped arc center which is consistent with the center of the main pier capping beam;
step A4: pouring a swivel main beam above the auxiliary pier capping beam and the main pier capping beam, arranging an anchoring device on the bottom wall of the swivel main beam on the opposite side of each traction counterforce seat, then arranging swivel supports between the middle of the bottom wall of the swivel main beam and the middle of the top wall of the main pier capping beam, wherein an upper rotary disc of each swivel support is fixedly connected with the bottom of the swivel main beam through a bolt, and a lower rotary disc of each swivel support is fixedly connected with the top wall of the main pier capping beam through a bolt; in an initial state, the anchoring devices at two ends of the main beam of the swivel body are respectively opposite to the directions of the two traction counterforce seats on the auxiliary pier capping beam;
step A5: a plurality of supporting legs are welded and fixed on the bottom wall of the main beam of the swivel respectively corresponding to the arc-shaped swivel slide ways, and the lower parts of the plurality of supporting legs are respectively installed in the arc-shaped swivel slide ways and can move in the arc-shaped swivel slide ways;
step A6: respectively fixing a swivel jack on each traction force counter-force seat, anchoring one end of a traction steel cable on the swivel jack, and sequentially contacting the other end of the traction steel cable with a steering wheel and a supporting leg passing through a steering block and then anchoring the other end of the traction steel cable on an anchoring device at the bottom wall of a main beam of the swivel;
step A7: simultaneously starting the two swivel jacks to drive the swivel supports to rotate and the supporting feet to slide on the arc-shaped swivel slide ways to form a rotating couple, so that the beam body rotates to a designed position around the central axis of the swivel supports;
step A8: and (4) dismantling the auxiliary piers, the auxiliary pier capping beams, the main pier capping beams, the cross braces and the turning auxiliary device to complete turning construction.
The invention has the advantages and positive effects that:
1) compared with the traditional pier top rotating method, the rotating device adopts the rotating support, adopts factory prefabrication and field finished product installation, and has high manufacturing and installation precision and short construction period.
2) Compared with the traditional pier top rotating method, the rotating support can be used as a rotating device and also can be used as a permanent support after rotating, the complicated procedure of replacing the permanent support by the rotating device is omitted, the construction equipment is simplified, the construction operation is simple and convenient, and the safety is greatly improved.
3) Compared with the traditional pier top turning method, the pier top turning construction operation and the turning equipment installation space are increased by arranging the turning auxiliary temporary pier, the problem that the main pier structure size is too large due to the fact is avoided, the structural design difficulty of the main pier is reduced, and the landscape performance after the main pier structure is bridged is greatly improved.
4) Compared with the traditional pier top rotating method, the supporting feet have the functions of balance support and an upper rotating disc, an upper rotating disc does not need to be arranged on the main pier top, the weight of the structural rotating body is reduced, and the landscape performance is better.
In conclusion, the pier top swivel construction method is simple and reasonable in structure, convenient and rapid in construction operation, good in landscape, safe in construction, high in reliability and good in application prospect.
Drawings
FIG. 1 is a schematic structural elevation view of the bridge pier top swivel construction method of the present invention;
FIG. 2 is a top view of the structure shown in FIG. 1;
fig. 3 is a plan view of the temporary pier and its capping beam in the structure shown in fig. 1.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following preferred embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, the bridge pier top swivel construction method of the present invention includes the following steps:
step A1: the method comprises the following steps that two bridge main piers 2 are arranged at intervals in the front and back of a set position, main pier capping beams 3 are laid on the two bridge main piers 2 in a through length mode, a plurality of auxiliary piers 5 are respectively and evenly arranged at intervals at two arc-shaped section positions which are oppositely arranged and are constructed by taking the center of the main pier capping beam 3 as the circle center and by the same set radius, auxiliary pier capping beams 6 are laid on the auxiliary piers 5 on each side in a through length mode, and a plurality of transverse struts 14 are respectively arranged between the main pier capping beams and the auxiliary pier capping beams on the two sides;
step A2: arc-shaped swivel slideways 7 are respectively arranged on the top walls of the auxiliary pier capping beams 6 at the two sides and corresponding to the positions of the supporting feet 9 to be installed, and the arc centers of the arc-shaped swivel slideways 7 are consistent with the center of the main pier capping beam 3; preferably, a polytetrafluoroethylene plate sliding block is arranged on the bottom wall of the arc-shaped rotating body sliding way 7.
Step A3: respectively arranging traction reaction force seats 11 at one end of the top wall of the auxiliary pier cap beam 6 at two sides, wherein the two traction reaction force seats 11 are arranged diagonally, steering blocks 12 are respectively fixed on the top wall of the auxiliary pier cap beam 6 at the inner side of each traction reaction force seat 11, and steering wheels are arranged on the steering blocks 12; a plurality of jack counter-force seats 8 are respectively fixed on the top walls of the auxiliary pier capping beams 6 at the inner sides and the outer sides of the two arc-shaped rotary slide ways 7 at intervals, wherein the plurality of jack counter-force seats 8 at the inner sides and the plurality of jack counter-force seats 8 at the outer sides respectively form arc-shaped arc centers which are consistent with the center of the main pier capping beam 3;
step A4: pouring a swivel main beam 1 above the auxiliary pier capping beam 6 and the main pier capping beam 3, arranging an anchoring device 10 on the bottom wall of the swivel main beam 1 opposite to each traction reaction seat 11, then arranging swivel supports 4 between the middle of the bottom wall of the swivel main beam 1 and the middle of the top wall of the main pier capping beam 3, fixedly connecting an upper rotary disc of each swivel support 4 with the bottom of the swivel main beam 1 through a bolt, and fixedly connecting a lower rotary disc of each swivel support 4 with the top wall of the main pier capping beam 3 through a bolt;
in an initial state, the anchoring devices 10 at two ends of the main beam 1 of the swivel body are respectively opposite to the directions of the two traction reaction force seats 11 on the auxiliary pier cap beam 6;
the swivel support 4 is of a structure disclosed in the invention name of ZL 201320766505X of patent number ZL 201320766505.
Step A5: a plurality of supporting feet 9 are welded and fixed on the bottom wall of the main swivel beam 1 at positions corresponding to the arc-shaped swivel slide ways 7 respectively, and the lower parts of the plurality of supporting feet 9 are installed in the arc-shaped swivel slide ways 7 respectively and can move in the arc-shaped swivel slide ways 7;
step A6: a swivel jack is respectively fixed on each traction force counter-force seat 11, one end of a traction steel cable 13 is anchored on the swivel jack, and the other end of the traction steel cable 13 sequentially contacts a steering wheel passing through a steering block 12 and a supporting leg 9 and is then anchored on an anchoring device 10 on the bottom wall of a main beam 1 of the swivel;
step A7: simultaneously starting the two swivel jacks to drive the swivel support 4 to rotate and the supporting feet 9 to slide on the swivel slide ways 7 to form a rotating couple, so that the beam body rotates to a designed position around the central axis of the swivel support; preferably, if the main beam of the swivel body stops in the rotating process, the jack for assisting force application is arranged on the jack counterforce seat 8 at the position corresponding to the bottom wall of the beam body, and the beam body is driven to assist in rotating through the jack for assisting force application.
Step A8: and (5) dismantling the auxiliary piers 5, the auxiliary pier capping beams 6, the main pier capping beams and the cross braces 14 and the swivel auxiliary device to complete swivel construction. The swivel support 4 is used as a permanent support.
The pier swivel structure adopted by the method comprises two bridge main piers 2 which are arranged at set positions at intervals in the front-back direction, main pier capping beams 3 are paved on the two bridge main piers 2 in a through length mode, a plurality of auxiliary piers 5 are respectively and evenly arranged at intervals in two oppositely arranged arc sections which are constructed by taking the center of the main pier capping beam 3 as the circle center and by the set same radius, auxiliary pier capping beams 6 are paved on the plurality of auxiliary piers 5 on each side in a through length mode, and a plurality of transverse struts 14 are respectively arranged between the main pier capping beams and the auxiliary pier capping beams on the two sides;
arc-shaped swivel slideways 7 are respectively arranged on the top walls of the auxiliary pier capping beams 6 at the two sides and at positions corresponding to the supporting feet 9 to be installed, and the arc centers of the arc-shaped swivel slideways 7 are consistent with the center of the middle bridge main pier 2; preferably, a polytetrafluoroethylene plate sliding block is arranged on the bottom wall of the arc-shaped rotating body sliding way 7.
A traction reaction force seat 11 is respectively arranged at one end of the top wall of the auxiliary pier cap beam 6 at two sides, the two traction reaction force seats 11 are arranged diagonally, a steering block 12 is respectively fixed on the top wall of the auxiliary pier cap beam 6 at the inner side of each traction reaction force seat 11, and a steering wheel is arranged on the steering block 12; a plurality of jack counter-force seats 8 are respectively fixed on the top walls of the auxiliary pier capping beams 6 at the inner sides and the outer sides of the two arc-shaped rotary slide ways 7 at intervals, wherein the plurality of jack counter-force seats 8 at the inner sides and the plurality of jack counter-force seats 8 at the outer sides respectively form arc-shaped arc centers which are consistent with the center of the main pier capping beam 3;
the main swivel beam 1 is positioned above the auxiliary pier capping beam 6 and the main pier capping beam 3, and in an initial state, the anchoring devices 10 at two ends of the main swivel beam 1 are opposite to the directions of the two traction reaction force seats 11 on the auxiliary pier capping beam 6 respectively;
a swivel support 4 is arranged between the bottom wall of the swivel main beam 1 and the top wall of the central position of the corresponding main pier capping beam 3, an upper rotary disc of the swivel support 4 is fixedly connected with the bottom of the swivel main beam 1 through a bolt, and a lower rotary disc of the swivel support 4 is fixedly connected with the top wall of the main pier capping beam 3 through a bolt;
a plurality of supporting feet 9 are welded and fixed on the bottom wall of the main swivel beam 1 at positions corresponding to the arc-shaped swivel slide ways 7 respectively, the lower parts of the plurality of supporting feet 9 are installed in the arc-shaped swivel slide ways 7 respectively and can move in the arc-shaped swivel slide ways 7, and an anchoring device 10 is arranged on the bottom wall of the main swivel beam 1 at the opposite side of each traction counter-force seat 11;
each traction reaction force seat 11 is respectively fixed with a swivel jack, one end of a traction steel cable 13 is anchored on the swivel jack, and the other end of the traction steel cable 13 sequentially contacts a steering wheel passing through a steering block 12 and a supporting leg 9 and is then anchored on an anchoring device 10 on the bottom wall of a main beam 1 of the swivel.
Preferably, if stagnation occurs in the rotation process of the main beam of the swivel, a supporting beam is fixed between two jack reaction seats of one or more groups of jack reaction seats 8 consisting of the jack reaction seats 8 at the inner side and the jack reaction seats 8 at the outer side of the same radian position, a jack assisting in stressing is fixed in the middle of the supporting beam, the jack assisting in stressing pushes the supporting leg 9 which is arranged close to the supporting leg, and the main beam of the swivel is driven to assist in rotation by the jack assisting in stressing.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (3)
1. A bridge pier top swivel construction method is characterized by comprising the following steps:
step A1: the method comprises the following steps that two bridge main piers are arranged at intervals in front of and behind a set position, main pier capping beams are laid on the two bridge main piers in a through-length mode, a plurality of auxiliary piers are respectively and evenly arranged at intervals at two oppositely-arranged arc-shaped section positions which are constructed by taking the center of the main pier capping beam as the circle center and by using the same set radius, the auxiliary pier capping beams are laid on the auxiliary piers on each side in a through-length mode, and a plurality of transverse supports are respectively arranged between the main pier capping beams and the auxiliary pier capping beams on the two sides;
step A2: arc-shaped rotating body slide ways are respectively arranged on the top walls of the auxiliary pier capping beams on the two sides and corresponding to the positions of the supporting feet to be installed, and the arc centers of the arc-shaped rotating body slide ways are consistent with the center of the main pier capping beam;
step A3: respectively arranging traction reaction force seats at one end of the top wall of the auxiliary pier cap beam at two sides, wherein the two traction reaction force seats are arranged diagonally, respectively fixing a steering block on the top wall of the auxiliary pier cap beam at the inner side of each traction reaction force seat, and mounting a steering wheel on the steering block; a plurality of jack counter-force seats are respectively fixed on the top walls of the auxiliary pier capping beams at the inner sides and the outer sides of the two arc-shaped rotating body slide ways at intervals, wherein the plurality of jack counter-force seats at the inner sides and the plurality of jack counter-force seats at the outer sides respectively form an arc-shaped arc center which is consistent with the center of the main pier capping beam;
step A4: pouring a swivel main beam above the auxiliary pier capping beam and the main pier capping beam, arranging an anchoring device on the bottom wall of the swivel main beam on the opposite side of each traction counterforce seat, then arranging swivel supports between the middle of the bottom wall of the swivel main beam and the middle of the top wall of the main pier capping beam, wherein an upper rotary disc of each swivel support is fixedly connected with the bottom of the swivel main beam through a bolt, and a lower rotary disc of each swivel support is fixedly connected with the top wall of the main pier capping beam through a bolt; in an initial state, the anchoring devices at two ends of the main beam of the swivel body are respectively opposite to the directions of the two traction counterforce seats on the auxiliary pier capping beam;
step A5: a plurality of supporting legs are welded and fixed on the bottom wall of the main beam of the swivel respectively corresponding to the arc-shaped swivel slide ways, and the lower parts of the plurality of supporting legs are respectively installed in the arc-shaped swivel slide ways and can move in the arc-shaped swivel slide ways;
step A6: respectively fixing a swivel jack on each traction force counter-force seat, anchoring one end of a traction steel cable on the swivel jack, and sequentially contacting the other end of the traction steel cable with a steering wheel and a supporting leg passing through a steering block and then anchoring the other end of the traction steel cable on an anchoring device at the bottom wall of a main beam of the swivel;
step A7: simultaneously starting the two swivel jacks to drive the swivel supports to rotate and the supporting feet to slide on the arc-shaped swivel slide ways to form a rotating couple, so that the beam body rotates to a designed position around the central axis of the swivel supports;
step A8: and (4) dismantling the auxiliary piers, the auxiliary pier capping beams, the main pier capping beams, the cross braces and the turning auxiliary device to complete turning construction.
2. The bridge pier top swivel construction method according to claim 1, characterized in that: the bottom wall of the arc-shaped rotating body slide way is provided with a polytetrafluoroethylene plate slide block.
3. The bridge pier top swivel construction method according to claim 1 or 2, characterized in that: if the main beam of the swivel body is stopped in the rotating process, a supporting beam is fixed between two jack reaction seats of one or more groups of jack reaction seats consisting of the jack reaction seats at the inner side and the jack reaction seats at the outer side of the same radian position, an auxiliary stressing jack is fixed in the middle of the supporting beam, the auxiliary stressing jack pushes a supporting foot which is arranged close to the supporting beam, and the auxiliary stressing jack drives the main beam of the swivel body to assist in rotating.
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| CN201910350447.4A CN110144830B (en) | 2019-04-28 | 2019-04-28 | Bridge pier top rotation construction method |
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| CN201910350447.4A CN110144830B (en) | 2019-04-28 | 2019-04-28 | Bridge pier top rotation construction method |
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| CN110144830B true CN110144830B (en) | 2020-10-16 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593123A (en) * | 2019-10-11 | 2019-12-20 | 中交二公局第五工程有限公司 | Capping beam rotation construction equipment and construction method thereof |
| CN111926714B (en) * | 2020-08-19 | 2021-09-03 | 中交路桥华南工程有限公司 | Installation method of steel truss girder bridge |
| CN112323646B (en) * | 2020-10-29 | 2022-03-29 | 德州市公路工程总公司 | Construction method and application of horizontal swivel system of rigid frame bridge |
| CN112854020B (en) * | 2021-01-14 | 2023-02-03 | 中铁工程设计咨询集团有限公司 | Continuous steel truss girder pier top swivel system conversion method |
| CN113585100B (en) * | 2021-08-10 | 2023-03-21 | 中铁九局集团第七工程有限公司 | Bridge incremental launching and rotating automatic construction method |
| CN114351601B (en) * | 2021-12-10 | 2023-11-28 | 中铁四院集团南宁勘察设计院有限公司 | Reaction frame device for bridge swivel construction and construction method thereof |
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