CN211547412U

CN211547412U - Precise control bridge jacking system

Info

Publication number: CN211547412U
Application number: CN201821241501.9U
Authority: CN
Inventors: 王新泉
Original assignee: Hangzhou Jiangrun Technology Co Ltd
Current assignee: Hangzhou Jiangrun Technology Co Ltd
Priority date: 2018-08-02
Filing date: 2018-08-02
Publication date: 2020-09-22
Anticipated expiration: 2028-08-02

Abstract

The utility model relates to a jacking control system, concretely relates to fine control bridge jacking system. The bridge jacking device comprises a cover beam, a bridge deck plate of a bridge to be jacked and an adjustable hoop prestress supporting platform, wherein the bridge deck plate is positioned on the cover beam, the adjustable hoop prestress supporting platform is arranged below the cover beam, a plurality of jacking jacks and follow-up brackets are arranged on the adjustable hoop prestress supporting platform, and the tops of the jacking jacks and the follow-up brackets are in stressed contact with the bottom of the bridge deck plate; the jacking control system is arranged on the scaffold, and the jacking jacks are uniformly controlled by the jacking control system; the bridge deck is provided with a stress monitor and a level monitor, and the bent cap is provided with a transverse limiting device for limiting the bridge deck in the transverse direction. The system can accurately control the jacking of the bridge and complete construction displacement in a matched manner.

Description

Precise control bridge jacking system

Technical Field

The utility model relates to a jacking control system, concretely relates to fine control bridge jacking system.

Background

The original buildings need to be reconstructed according to the needs of urban planning and development, but some buildings have high use value and great social significance. The whole process is reversed and rebuilt, which has great influence on the cost and the life of the surrounding residents. Therefore, a building displacement technology based on no damage to the building structure is developed at home and abroad, wherein a bridge jacking technology is a typical representative.

The general bridge jacking construction adopts a hydraulic jack to jack, but the control on the displacement of a bridge deck during jacking is not good, which not only influences the construction quality, but also causes great hidden danger to the safety during the whole construction. In addition, utilize hydraulic jack jacking alone, do not set up the bracket structure, if the proruption trouble appears in jack jacking, then the decking can directly fall off, and these all can directly influence the safety of whole bridge structures.

In conclusion, it is very urgent to find a novel precisely-controlled bridge jacking system which is safe and can precisely control jacking construction displacement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving and not destroying bridge building structure and reaching the problem of shifting the bridge for the basis, provide a fine control bridge jacking system.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

a precisely controlled bridge jacking system comprises a bent cap, a bridge deck of a bridge to be jacked and positioned on the bent cap, and an adjustable hoop prestress supporting platform arranged below the bent cap, wherein a plurality of jacking jacks and follow-up brackets are arranged on the adjustable hoop prestress supporting platform, and the tops of the jacking jacks and the follow-up brackets are in stressed contact with the bottom of the bridge deck; the jacking control system is arranged on the scaffold, and the jacking jacks are uniformly controlled by the jacking control system; the bridge deck is provided with a stress monitor and a level monitor, and the bent cap is provided with a transverse limiting device for limiting the bridge deck in the transverse direction.

Preferably, the follower brackets are at least two.

Preferably, the transverse limiting device comprises a limiting truss, a supporting block and a fixing plate, a track is arranged on the limiting truss, the supporting block is in sliding connection with the limiting truss through the track, a limiting jack is arranged between the supporting block and the fixing plate and connected with the supporting block through the limiting jack, and the fixing plate is installed on two end faces of the bridge deck.

Preferably, the stress monitor is arranged on the lower surface of the bridge deck.

Preferably, the level monitor is arranged at an upper surface of the bridge deck.

Preferably, the level monitor is located at the follower bracket and mid-span at the bottom of the deck plate.

Preferably, the bottom of the bridge deck is provided with a bridge bottom distribution beam, and the top of the jacking jack is in contact with the bottom of the bridge bottom distribution beam.

Compared with the prior art, the utility model, beneficial effect is:

(1) the utility model discloses a horizontal stop device cooperation sets up the surveyor's level monitoring point, and jacking construction quality is guaranteed to horizontal, the vertical displacement of control decking jacking that can be better.

(2) The utility model discloses the follow-up bracket that sets up can guarantee when the jack breaks down, the security of whole jacking construction.

(3) The jacking of the bridge can be accurately controlled, and construction displacement is completed in a matched mode.

Drawings

Fig. 1 is a schematic structural diagram of a precisely controlled bridge jacking system of the present invention;

fig. 2 is a schematic structural view of the horizontal limiting device of the present invention.

In the figure: 1, pier stud; 2, a capping beam; 3, a bridge deck; 4, supporting seat; 5, jacking a jack; 6, supporting blocks; 11, an adjustable hoop prestress supporting platform; 18 a follower bracket; 22 bridge bottom distribution beams; 26 tracks; a 46 level monitor; 47 a stress monitor; 48 transverse limiting devices; 49 limiting trusses; 50 fixing the plate; 51 transversely limiting the jack; and (5) jacking a control system.

Detailed Description

The technical solution of the present invention is further described and illustrated by the following specific embodiments.

The raw materials used in the examples of the present invention are all those commonly used in the art, and the methods used in the examples are all those conventionally used in the art.

A precisely controlled bridge jacking system is shown in figure 1 and comprises a cover beam 2, a bridge deck 3 positioned on the cover beam 2 and used for jacking a bridge, and an adjustable hoop prestress supporting platform 11 arranged below the cover beam 2, wherein a plurality of jacking jacks 5 and follow-up brackets 18 are arranged on the adjustable hoop prestress supporting platform 11, and the tops of the jacking jacks 5 and the follow-up brackets 18 are in stressed contact with the bottom of the bridge deck 3; the lifting jack 5 is uniformly controlled by the lifting control system 52; the bridge deck 3 is provided with a stress monitor 47 and a level monitor 46, and the capping beam 2 is provided with a transverse limiting device 48 for limiting the bridge deck 3 in the transverse direction. The stress monitor 47 is arranged at the lower surface of the bridge deck 3, the level monitor 46 is arranged at the upper surface of the bridge deck 3, and the level monitor 46 is located at the follower bracket 18 and at a bottom mid-span position of the bridge deck 3. The bottom of the bridge deck 3 is provided with a bridge bottom distribution beam 22, and the top of the jacking jack 5 is contacted with the bottom of the bridge bottom distribution beam 22.

As shown in fig. 2, the transverse limiting device 48 includes a limiting truss 49, a supporting block 6 and a fixing plate 50, the limiting truss 49 is provided with a track 26, the supporting block 6 is slidably connected with the limiting truss 49 through the track 26, a limiting jack 51 is provided between the supporting block 6 and the fixing plate 50 and connected through the limiting jack 51, and the fixing plate 50 is installed on two end faces of the bridge deck.

The concrete construction method is as follows:

firstly, a plurality of bridge bottom distribution beams 22 which are I10 square timber are arranged below the bridge deck 3 according to design requirements, cushion blocks are arranged at positions corresponding to the bridge bottom distribution beams on the adjustable hoop prestress supporting platform 11 on the pier stud 1, and the jacking jacks 5 are erected. In order to ensure the safety of the bridge structure when the jacking jack 5 fails, a follow-up bracket 18 is also arranged on the adjustable hoop prestress supporting platform 11.

And secondly, the support 4 on the capping beam 2 and the bridge deck 3 are released from being fixed, and referring to fig. 1, a level monitor 46 is arranged on the upper surface of the bridge deck 3 according to the design requirement, and stress monitoring points 47 are arranged at the action part and the midspan position of the lower surface follow-up bracket 18, so that the condition of the bridge deck 3 during jacking construction can be monitored at any time.

Third, a lateral stop 48 as shown in FIG. 2 is installed. The limiting truss 49 is fixed on the cover beam 2; the transverse limiting jack 51 is arranged between the supporting block 6 and the fixing plate 50; the fixing plates 50 are installed at both end surfaces of the bridge deck 3. When the bridge deck 3 is shifted laterally during jacking, the rails 26 and the limiting truss 49 are stressed, and the gradual fine adjustment and correction are performed by means of the lateral limiting jack 51. And a jacking control system 52 for controlling the jacking of the jack is arranged on the construction frame, and after the construction is finished, the jacking construction is gradually started according to the specified requirements.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A fine control bridge jacking system is characterized by comprising a cover beam (2), a bridge deck (3) to be jacked on the cover beam (2) and an adjustable hoop prestress supporting platform (11) arranged below the cover beam (2), wherein a plurality of jacking jacks (5) and follow-up brackets (18) are arranged on the adjustable hoop prestress supporting platform (11), and the tops of the jacking jacks (5) and the follow-up brackets (18) are in stressed contact with the bottom of the bridge deck (3); the lifting jack is characterized by further comprising a lifting control system (52) arranged on the construction frame, and the lifting jacks (5) are uniformly controlled by the lifting control system (52); the bridge deck (3) is provided with a stress monitor (47) and a level monitor (46), and the bent cap (2) is provided with a transverse limiting device (48) for limiting the bridge deck (3) in the transverse direction.

2. Fine control bridge jacking system according to claim 1, wherein there are at least two follower brackets (18).

3. The fine control bridge jacking system according to claim 1 or 2, wherein the transverse limiting device (48) comprises a limiting truss (49), a supporting block (6) and a fixing plate (50), a track (26) is arranged on the limiting truss (49), the supporting block (6) is in sliding connection with the limiting truss (49) through the track (26), a limiting jack (51) is arranged between the supporting block (6) and the fixing plate (50) and connected through the limiting jack (51), and the fixing plate (50) is installed on two end faces of the bridge deck.

4. The fine control bridge jacking system according to claim 1, wherein the stress monitors (47) are arranged on a lower surface of the deck slab (3).

5. The fine control bridge jacking system according to claim 1, wherein the level monitor (46) is arranged at an upper surface of the deck slab (3).

6. The fine control bridge jacking system according to claim 1, wherein the level monitor (46) is located at the follower bracket (18) and at a mid-span position at the bottom of the deck slab (3).

7. The fine control bridge jacking system according to claim 1, wherein the bottom of the bridge deck (3) is provided with a bridge bottom distribution beam (22), and the top of the jacking jack (5) is in contact with the bottom of the bridge bottom distribution beam (22).