CN212154243U

CN212154243U - Underpinning device for pulling column of joist

Info

Publication number: CN212154243U
Application number: CN202020518165.9U
Authority: CN
Inventors: 李鹏; 孟锦; 张波; 王旭; 田勇; 谢云伟; 许胜�; 杨晓; 董少飞
Original assignee: China Construction Third Engineering Bureau Co Ltd
Current assignee: China Construction Third Engineering Bureau Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-12-15
Anticipated expiration: 2030-04-13

Abstract

The utility model relates to a joist pulls out underpinning device of post, this underpinning device include that from the top down sets gradually double web H shaped steel, horizontal support H shaped steel and jack. The utility model discloses the construction is simple and convenient, the quality is reliable, safe controllable and save the cost.

Description

Underpinning device for pulling column of joist

Technical Field

The utility model belongs to the technical field of existing building joist and specifically relates to a device is traded in underpinning that post operation construction field, post were pulled out to joist.

Background

The existing building can not meet the existing requirements due to the fact that the actual functions of the building are required due to the fact that the using functions of the existing building are changed or factors such as unreasonable space design and the like, and the existing building needs to be provided with middle span structural columns due to internal space transformation, namely, when the columns are pulled out through joists, the problem of how to install reinforcing steel bars of the beams with the enlarged cross sections is generally existed, and a better solution is not found at present.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an above-mentioned technical problem who exists among the solution background art, and provide a joist of construction simple and convenient, the quality is reliable, safe controllable, save the cost and pull out the underpinning device of post.

The technical solution of the utility model is that: the utility model relates to a joist pulls out underpinning device of post, its special character lies in: the device comprises double-web H-shaped steel, horizontal support H-shaped steel and a jack which are sequentially arranged from top to bottom.

Preferably, two sides of the double-web H-shaped steel are respectively provided with a cushion block.

Preferably, a steel backing plate is arranged below the jack.

Preferably, the side surface of the jack is provided with anti-falling support H-shaped steel.

Preferably, a stiffening plate is arranged in the horizontal support H-shaped steel.

Preferably, the jack is a hydraulic jack.

Preferably, the two jacks adopt a parallel connection mode, one oil pump provides jacking power, and the two jacks are respectively provided with a hydraulic oil nozzle switch.

The utility model discloses a set up two jacks, jack support shaped steel (double web H shaped steel and horizontal support H shaped steel), support shaped steel and support the cushion, the cushion supports a joist, cuts off and waits to demolish the surplus concrete of post both sides and make the utility model discloses replace and wait to demolish the post atress, replace and wait to demolish the vertical load of post downward conduction to can increase cross-section beam reinforcement and prestressed reinforcement and link up smoothly. Utilize simultaneously the utility model discloses an underpin device, the utility model also provides a do not demolish superstructure, pull out the construction process that the post changed the inner space through the joist, adopt the inside measure of loosing core of structure post and add the underpin device that the jack supported, replace original demolising and rebuild or shaped steel braced system, make pointed ground take such as transformation building service function, reform transform the inner space, make measures such as linking position of new and old building, reach current demand, consequently the utility model has the advantages of the construction is simple and convenient, the quality is reliable, safe controllable and save the cost.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic plan view of a column to be dismantled;

FIG. 4 is a schematic cross-sectional view of a column to be dismantled;

FIG. 5 is a schematic view of the mounting of the underpinning device for the joist pull column;

FIG. 6 is a cross-sectional view of the mounting of the underpinning apparatus for the joist pull stud;

FIG. 7 is a schematic view of cutting the remaining concrete on both sides;

FIG. 8 is an elevation view of the support system through the rebar;

FIG. 9 is a cross-sectional view of the support system through the rebar;

FIG. 10 is a schematic view of the demolition of a column to be demolished;

the reference numbers are as follows:

1. cushion blocks; 2. horizontally supporting the H-shaped steel; 3. a jack; 4. the anti-falling support H-shaped steel; 5. a stiffening plate; 6. a hydraulic nozzle switch; 7. a steel backing plate; 8. double web H-shaped steel; 9. the hole cutting position of the rope saw; 10. a rectangular hole; 11. the column is to be dismantled; 12. a deformation monitoring point; 13. two sides of the concrete are left; 14. increasing the section beam steel bar; 15. a prestressed beam.

Detailed Description

Referring to fig. 1 and 2, the structure of the embodiment of the present invention includes a double-web H-beam 8, a horizontal support H-beam 2 and a jack 3, which are sequentially arranged from top to bottom. Cushion blocks 1 are respectively arranged on two sides of the double-web H-shaped steel 8. A steel base plate 7 is arranged below the jack 3, the steel base plate 7 ensures that the jack 3 is supported stably, and the concrete stress of the lower contact surface is uniform; the side face of the jack 3 is provided with an anti-falling support H-shaped steel 4, so that the cross beam is prevented from falling under the condition that the jack 3 is under pressure loss. And a stiffening plate 5 is also arranged in the horizontal support H-shaped steel 2 to further strengthen the support of the horizontal support H-shaped steel 2. The jack 3 is a hydraulic jack. The two jacks 3 are connected in parallel, one oil pump provides jacking power, and the two jacks 3 are respectively provided with a hydraulic oil nozzle switch 6.

Utilize the utility model discloses demolish and wait to demolish the work flow of post as follows:

referring to fig. 3, firstly determining a rope saw hole opening position 11 of a column to be dismantled, referring to fig. 4, cutting a rectangular hole 10 in the center of the column to be dismantled by using a rope saw, referring to fig. 5 and 6, and sequentially adding a steel backing plate 7, a jack 3, an anti-falling support H-shaped steel 4, a horizontal support H-shaped steel 2, a double-web plate H-shaped steel 8 and a cushion block 1 in the rectangular hole 10; the jack 3 supports replace short walls on two sides to bear force, so that the vertical load of the short walls is transferred to a jack supporting system, and the construction process can be tracked and monitored through the deformation monitoring points 12. Referring to fig. 7, after the vertical load is completely borne by the jack support system, the remaining concrete 13 on both sides of the column is cut off. Referring to fig. 8, 9 and 10, the original structural beam is reinforced by enlarging the section and prestressing, the jack 3 is gradually unloaded after the beam reinforcing steel bars 14 and the prestressed beam 15 with the enlarged section are installed and the prestressing construction is completed, and the jack support and the residual structural columns are removed after the prestressed beam 15 completely bears the vertical load. And finally, finishing the construction of pulling the column by the joist.

The above is only the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. The utility model provides a device is traded in underpinning of post is pulled out to joist which characterized in that: the device comprises double-web H-shaped steel, horizontal support H-shaped steel and a jack which are sequentially arranged from top to bottom.

2. The joist column underpinning device as claimed in claim 1, wherein: cushion blocks are respectively arranged on two sides of the double-web H-shaped steel.

3. The joist column underpinning device as claimed in claim 2, wherein: and a steel base plate is arranged below the jack.

4. The joist column underpinning device as claimed in claim 3, wherein: the side face of the jack is provided with anti-falling support H-shaped steel.

5. The joist column underpinning device as claimed in claim 4, wherein: and a stiffening plate is arranged in the horizontal support H-shaped steel.

6. The joist column underpinning device as claimed in any one of claims 1 to 5, wherein: the jack is a hydraulic jack.

7. The joist column underpinning device as claimed in claim 6, wherein: the two jacks adopt a parallel connection mode, one oil pump provides jacking power, and the two jacks are respectively provided with a hydraulic oil nozzle switch.