CN110565544A

CN110565544A - support replacing method

Info

Publication number: CN110565544A
Application number: CN201910774718.9A
Authority: CN
Inventors: 章柏林; 邱会安; 束学智; 周广资; 王建永; 彭勇平; 刘春浩; 陈冠飞; 黄军; 冯思雨
Original assignee: SHANGHAI EVOLUTION SHIFT BUILDING ENGINEERING Co Ltd
Current assignee: SHANGHAI EVOLUTION SHIFT BUILDING ENGINEERING Co Ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2019-12-13

Abstract

the invention discloses a support replacing method, which comprises a bridge, an original support cushion stone, a first jack, a cutting line, a second jack, a spiral cushion block, a new support cushion stone and a new support, wherein the original support cushion stone is arranged on the original support; the method has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions, and can effectively avoid the damage of auxiliary buildings, facilities and the like of the bridge caused by the elevation change of the upper bridge; the support replacing method is static support replacing, has no influence on the front and back states of the bridge, and does not generate bridge attitude change; the control system of the invention is a hydraulic pump station which realizes synchronous control through computer operation, thereby meeting the requirement of jack constant value pressurization at different positions, and ensuring that the different positions of the bridge can be pressurized step by step according to the calculated load so as to carry out force conversion.

Description

Support replacing method

Technical Field

the invention relates to the technical field of bridge support replacement, in particular to a support replacement method.

background

in the process of replacing a common support, a jack is installed at the lower part of a bridge, the original support is taken out after the bridge is jacked to a certain height through a hydraulic control jacking system, a new support is installed in the original support, and then the bridge is descended through a control system. In the process of replacing the support, the bridge can generate elevation changes, the original state is damaged, traffic, decoration, pipelines and the like are influenced, and the elevation changes before and after the bridge support is replaced are difficult to control to be the same as the original state.

after the support replacing method is adopted, the bridge does not generate elevation change in the whole process of support replacement, and the original relative static state of the bridge, the attached buildings, pipeline facilities and the like is maintained.

disclosure of Invention

The invention aims to solve the problems and provide a support replacing method, which can realize zero elevation change of a bridge during support replacement and comprehensively control the function of zero change of the whole attitude of the bridge during support replacement.

in order to solve the above problems, the present invention provides a technical solution: the innovation point of the support replacing method is that: the support replacing method comprises the following steps:

A. Selecting a first jack with a proper type load according to different bridge piers, the support space of the abutment and the form of the bridge;

B. B, symmetrically mounting a first jack and a lower support column in the step A on two sides of an original support at the bottom of the bridge;

C. pressurizing the first jack in the step B through a control system according to a design value so as to underpin the bridge load;

D. cutting the cutting line on the original support base stone by a cutting machine so as to remove the original support and the original support base stone;

E. Mounting the new support at the position of the original support after the new support is dismounted in the step D, and arranging a second jack at the bottom of the new support;

F. D, pressurizing the jack II in the step E through a control system according to a design value to enable the jack II to prop against a new support;

G. F, uniformly installing a plurality of spiral cushion blocks at the edge of the bottom of the new support propped in the step F, and screwing down all the spiral cushion blocks to enable the spiral cushion blocks to prop against the bottom of the new support so as to replace the load of the jack;

H. d, dismantling the jack at the bottom of the new support after being jacked tightly in the step G;

I. Pouring the bottom of the new support in the step H, and simultaneously pouring the spiral cushion blocks in the step G together to form a new support cushion stone;

J. and D, when the new support base cushion stone reaches the use strength in the step I, removing the first jack and the lower support column to finish the replacement of the original support base.

Preferably, after the first jack is pressurized by the control system according to the design load of the bridge, the elevation of the bridge is not changed and is maintained as it is, and the load transmission route of the bridge is converted from the original transmission of the original support into the transmission of the first jack.

preferably, the control system is a hydraulic pump station which realizes synchronous control through computer operation.

preferably, the minimum height of the shortened spiral cushion block is smaller than the height of the bottom space of the new support.

preferably, a displacement sensor is installed on the bridge.

preferably, the cutting line is located on a horizontal plane.

The invention has the beneficial effects that:

(1) The method has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions, and can effectively avoid the damage of the auxiliary buildings, facilities and the like of the bridge caused by the elevation change of the upper bridge.

(2) The support replacing method is static support replacing, has no influence on the front and back states of the bridge, and does not generate bridge posture change.

(3) The control system of the invention is a hydraulic pump station which realizes synchronous control through computer operation, thereby meeting the requirement of jack constant value pressurization at different positions, and ensuring that the different positions of the bridge can be pressurized step by step according to the calculated load so as to carry out force conversion.

Drawings

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

Fig. 1 is a schematic view of an installation structure of a first jack in the invention.

fig. 2 is a schematic diagram of the position structure of the cutting line in fig. 1.

Fig. 3 is a schematic structural diagram of fig. 2 with the original support and the original support pad removed.

Fig. 4 is a schematic structural diagram of the new support and the second jack in fig. 3.

Fig. 5 is a schematic structural view of the spiral spacer block added in fig. 4.

Fig. 6 is a schematic structural view of the second jack shown in fig. 5.

fig. 7 is a schematic structural view of a new support base cushion stone after pouring in fig. 6.

Fig. 8 is a schematic view of the first jack and the lower support column of fig. 7 with the first jack and the lower support column removed.

1-a bridge; 2-original support; 3-original support base stone; 4, a first jack; 5-cutting line; 6-jack II; 7-a spiral cushion block; 8-new support base stone; 9-new support.

Detailed Description

As shown in fig. 1 to 8, the following technical solutions are adopted in the present embodiment: a method for replacing a support comprises the following steps:

A. Selecting a jack I4 with a proper type load according to different bridge piers, the support space of the abutment and the form of the bridge;

B. a, symmetrically mounting a first jack 4 and a lower support column in the step A on two sides of an original support 2 at the bottom of a bridge 1;

C. pressurizing the jack I4 in the step B through a control system according to a design value so as to underpin the load of the bridge 1;

D. Cutting a cutting line 5 on the original support base stone 3 through a cutting machine so as to remove the original support 2 and the original support base stone 3;

E. Mounting the new support 9 to the position of the original support 2 after the new support 9 is detached in the step D, and arranging a second jack 6 at the bottom of the new support 9;

F. pressurizing the second jack 6 in the step E through a control system according to a design value to enable the second jack to prop against the new support 9;

G. A plurality of spiral cushion blocks 7 are uniformly arranged at the bottom edge of the new support 9 propped in the step F, and all the spiral cushion blocks 7 are screwed down to prop against the bottom of the new support 9 so as to replace the load of the jack 6;

H. Dismantling the jack 6 at the bottom of the new support 9 after being jacked tightly in the step G;

I. Pouring the bottom of the new support 9 in the step H, and simultaneously pouring the spiral cushion blocks 7 in the step G together to form a new support cushion stone 8;

J. And (5) when the new support base stone 8 reaches the use strength in the step I, removing the first jack 4 and the lower support column to finish the replacement of the original support base 2.

After the jack I4 is pressurized by a control system according to the design load of the bridge, the elevation of the bridge 1 is not changed and is maintained as it is, and the load transmission route of the bridge 1 is converted from the original transmission of the original support 2 into the transmission of the jack I4; the control system is a hydraulic pump station which realizes synchronous control through computer operation; the minimum height of the shortened spiral cushion block 7 is smaller than the height of the bottom space of the new support 9; a displacement sensor is arranged on the bridge 1; the cutting line 5 is located on a horizontal plane.

the using state of the invention is as follows: the invention has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions, when in replacement, firstly, the first jack 4 is arranged at two sides of the bottom of the bridge through the lower support column, then the first jack 4 is used for carrying out load underpinning on the bridge 1, then the original support 2 and the original support cushion 3 are removed, a new support 9 is installed again, meanwhile, the second jack 6 is arranged at the center of the lower part of the new support 9, the second jack 6 is pressurized according to the design value of the support through a hydraulic control system, then the spiral cushion block 7 is arranged at the lower part of the new support 9, the second jack 6 is firmly jacked off and replaced with the new support 9 through screwing out of a spiral, then the second jack 6 is removed and a new support cushion 8 is formed through construction, and the second jack 4 and the lower support column at the lower side are removed after the new support cushion; the control system is a hydraulic pump station which realizes synchronous control through computer operation, so that the requirement of jack constant-value pressurization at different positions is met, the different positions of the bridge 1 can be pressurized step by step according to calculated load, and the bridge 1 is provided with a displacement sensor, so that the strict monitoring through the displacement sensor in the pressurization process is ensured, the upper bridge 1 cannot generate elevation change, and the upper structure realizes stress conversion in a static state; the spiral cushion block 7 is a cushion block with the height capable of being freely combined to adapt to heights of different support base cushion stones, meanwhile, the cushion block can be subjected to small-range height adjustment through a spiral, the cushion block is placed at the bottom of a new support 9 after being combined, the spiral is screwed out to be dead against the new support 9, stress conversion of the new support 9 is carried out, so that the second jack 6 is removed, the bearing capacity and the number of the spiral cushion block need to be matched with the design value of the support, and finally the spiral cushion block and the new support base cushion stone are poured together to serve as a part of a new support base cushion stone 8.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", 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, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A method for replacing a support is characterized in that: the support replacing method comprises the following steps:

A. selecting a first jack (4) with a proper type load according to different bridge piers, the support space of the abutment and the form of the bridge;

B. a, symmetrically mounting a first jack (4) and a lower support column in the step A on two sides of an original support (2) at the bottom of a bridge (1);

C. Pressurizing the jack I (4) in the step B through a control system according to a design value so as to underpin the load of the bridge (1);

D. Cutting a cutting line (5) on the original support base stone (3) through a cutting machine so as to detach the original support base (2) and the original support base stone (3);

E. mounting a new support (9) to the position of the original support (2) after the new support is dismounted in the step D, and arranging a second jack (6) at the bottom of the new support (9);

F. pressurizing the second jack (6) in the step E through a control system according to a design value to enable the second jack to prop against a new support (9);

G. uniformly installing a plurality of spiral cushion blocks (7) at the bottom edge of the new support (9) propped in the step F, and screwing down all the spiral cushion blocks (7) to enable the spiral cushion blocks to prop against the bottom of the new support (9) so as to replace the load of the jack 6;

H. Dismantling the jack 6 at the bottom of the new support (9) after being jacked tightly in the step G;

I. Pouring the bottom of the new support (9) in the step H, and simultaneously pouring the spiral cushion block (7) in the step G together to form a new support cushion stone (8);

J. And (3) when the new support base stone (8) reaches the use strength in the step I, removing the first jack (4) and the lower support column to finish the replacement of the original support base (2).

2. A seat exchange method according to claim 1, wherein: jack (4) are after control system pressurizes according to bridge design load, and bridge (1) elevation does not produce the change and maintains the original state, and the load transmission route of bridge (1) is transferred by original former support (2) and is changed the transmission of jack (4).

3. a seat exchange method according to claim 1, wherein: the control system is a hydraulic pump station which realizes synchronous control through computer operation.

4. A seat exchange method according to claim 1, wherein: the minimum height of the shortened spiral cushion block (7) is smaller than the height of the bottom space of the new support (9).

5. A seat exchange method according to claim 1, wherein: and a displacement sensor is arranged on the bridge (1).

6. a seat exchange method according to claim 1, wherein: the cutting line (5) is located on a horizontal plane.