CN210507146U

CN210507146U - Continuous beam construction bracket pre-compaction device

Info

Publication number: CN210507146U
Application number: CN201920881063.0U
Authority: CN
Inventors: 靳炳强; 吴建; 郝松超; 李振岐; 卢建明
Original assignee: Southeast University; China Railway 24th Bureau Group Zhejiang Engineering Testing Co Ltd
Current assignee: Southeast University; China Railway 24th Bureau Group Co Ltd; China Railway 24th Bureau Group Zhejiang Engineering Testing Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-05-12
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses a continuous beam construction bracket prepressing device, relating to the technical field of continuous beam construction; the concrete pile comprises a counter-pressure beam, embedded steel bars and a jack for pressing down a bracket, wherein the jack is positioned above the bracket, the jack is positioned below the counter-pressure beam, the embedded steel bars are fixedly connected to the top end of a concrete pier, the counter-pressure beam is positioned at the top end of the concrete pier, and the embedded steel bars are fixedly connected with the counter-pressure beam; the utility model provides a continuous beam construction bracket pre-compaction device adopts the jack to push down the bracket, and the back pressure roof beam provides reaction force, and the pre-pressure can be controlled to the power of control jack during the pre-compaction, has the efficient advantage of pre-compaction.

Description

Continuous beam construction bracket pre-compaction device

Technical Field

The utility model belongs to the technical field of continuous beam construction, in particular to continuous beam construction bracket pre-compaction device.

Background

When the continuous beam is constructed, for example, when a bridge is constructed, a pier is poured firstly, then a No. 0 block is constructed, then the continuous beam is symmetrically cast in a suspension mode on two sides of the No. 0 block, when the continuous beam is symmetrically cast in a suspension mode, firstly, a bracket is erected on the poured pier, the bottom of the bracket abuts against a bracket, after the bracket is installed, gaps exist between the bracket and other parts, therefore, pre-pressing is carried out after the bracket is erected, and therefore a bracket pre-pressing device is needed for pre-pressing.

The prior art generally adopts the sand bag to carry out the pre-compaction, and the pre-compaction is got up very trouble, and the pre-compaction is efficient.

Chinese patent No. CN108824210A, patent name "prepressing method of bridge support"; the method for prepressing the bridge support comprises the following steps: calculating the loading positions and the number of the pre-pressing blocks according to the area of the pre-pressing surface of the bracket, and determining an observation point for observing the elastic deformation condition of the bracket during loading; placing the prepressing block on the support prepressing surface according to the calculation result, symmetrically loading from the support central line to two sides, and keeping the loading rate consistent; step-by-step loading is carried out on the pre-pressing surface of the bracket, the numerical value of each observation point is calculated after each step of loading is finished, when the last step is loaded, static pressure observation is carried out for more than 4 hours, and then the numerical value of each observation point is calculated; and after the two measurement results before and after the last stage of loading are stable, the prepressing block is symmetrically unloaded step by step, and after the first stage of unloading is finished, the numerical values of all observation points are recorded and compared with the loading record, so that prepressing data of the support can be quickly and accurately acquired, and the bearing capacity and the stability of the structure can be checked to prepare for subsequently adjusting the support. The prior art often adopts a prepressing technology similar to the invention, and prepressing is carried out by adopting prepressing blocks such as sandbags and the like, so that the efficiency is low.

Disclosure of Invention

The utility model aims at overcoming the shortcoming that prior art pre-compaction is inefficient, providing a continuous beam construction bracket pre-compaction device, adopting the jack to push down the bracket, the back pressure roof beam provides reaction force, and the pre-compaction can be controlled to the power of control jack during the pre-compaction, has the efficient advantage of pre-compaction.

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

the utility model provides a continuous beam construction bracket pre-compaction device, includes counter-pressure roof beam, embedded bar and is used for pushing down the jack of bracket, the jack is located the bracket top, the jack is located counter-pressure roof beam below, the embedded bar rigid coupling is on concrete pier top, the counter-pressure roof beam is located concrete pier top, embedded bar and counter-pressure roof beam rigid coupling. During prepressing, a counter-pressure beam is installed at the top end of the concrete pier, then a jack is installed, then the jack is started, the jack is adopted to press down the bracket, the counter-pressure beam is adopted to provide a counter-acting force, the prepressing force can be regulated and controlled by controlling the force of the jack, the prepressing is very convenient, and the prepressing efficiency is high.

Preferably, a steel pipe is embedded in the top end of the concrete pier, two ends of the steel pipe are exposed on the surface of the concrete pier, and the bottom end of the embedded steel bar is fixedly connected with the steel pipe. The steel pipe is fixedly connected with the embedded steel bars, so that the embedded steel bars are not easy to pull out, and cooling water can be introduced into the steel pipe to help to maintain the concrete.

Preferably, a cushion block is arranged between the counter-pressure beam and the concrete pier. The height of the back pressure beam is convenient to adjust.

Preferably, a link rod is arranged on the lower side of the back pressure beam, a second link rod is arranged on the upper side of the bracket, the lower side of the link rod abuts against the top end of the jack, and the upper side of the second link rod abuts against the bottom end of the jack. Generally, a plurality of brackets are arranged on one side of a concrete pier, a link rod and a second link rod are arranged above the brackets, the second link rod connects the brackets, the link rod connects a plurality of back pressure beams, a jack is arranged between the link rod and the second link rod, and when the jack moves left and right, the link rod and the second link rod can enable the jack to be more stable and not easy to shift singly.

Preferably, a reinforcing purlin is included for increasing the lateral stiffness of the carriage. The bracket is of a triangular structure, the surface where the bracket is located is perpendicular to the reinforcing purlines, and the reinforcing purlines connect the adjacent brackets together, so that the transverse rigidity of the bracket is increased.

Preferably, the bracket also comprises a steel box for limiting the bracket. Be provided with spacing arch on the bracket, when the installation bracket, put into the steel box with spacing arch, be favorable to the stability of bracket.

Preferably, the concrete pier further comprises a plurality of long thread steel bars, the long thread steel bars penetrate through the concrete pier, and two ends of the long thread steel bars are fixedly connected with the bracket. Generally, when a continuous beam is cast in a suspension mode, a No. 0 block is used as a center and symmetrically cast towards two sides, so that the brackets are symmetrically arranged on two sides of a concrete pier, the upper side of each bracket is fixedly connected with the long-thread steel bars in a prepressing mode, the long-thread steel bars bear tensile force, the long-thread steel bars are long in the concrete pier, two ends of each long-thread steel bar are pulled by the brackets on two sides of each long-thread steel bar, and the long-thread steel bars are not easy to pull out.

The utility model has the advantages that: the utility model provides a continuous beam construction bracket pre-compaction device adopts the jack to push down the bracket, and the back pressure roof beam provides reaction force, and the pre-pressure can be controlled to the power of control jack during the pre-compaction, has the efficient advantage of pre-compaction.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is an enlarged view of fig. 2 at B.

In the figure: bracket 1, steel box 2, bracket 3, jack 4, counter-pressure beam 5, embedded steel bar 6, concrete pier 8, cushion 9, steel pipe 10, reinforcing purlin 11, link rod 12, second link rod 13, long thread steel bar 14, spacing arch 15, anchor assembly 16.

Detailed Description

The invention will be further explained in detail with reference to the drawings and the following detailed description:

example (b):

a continuous beam construction bracket prepressing device comprises a counter-pressure beam 5, a reinforcing purline 11 and a steel box 2, the long-thread steel bars 14, the embedded steel bars 6 and the jacks 4 used for pressing the brackets 3 downwards, the steel boxes 2 are symmetrically embedded on two opposite sides of a concrete pier 8 (namely a pier), the number of the steel boxes on each side is two, each steel box 2 is provided with one bracket, each bracket is provided with a limiting bulge 15 matched with the steel box 2, each limiting bulge 15 is located in the steel box 2, the bracket 3 is arranged on the upper side of each bracket, the bracket 3 abuts against the upper side of each bracket, the second connecting rod 13 is arranged on the upper side of each bracket 3, the jacks 4 are located on the upper sides of the second connecting rods 13, the jacks 4 are located below the counter-pressure beams 5, the connecting rods 12 are arranged on the lower sides of the counter-pressure beams 5, the embedded steel bars 6 are fixedly connected to the top ends of the concrete pier 8, the lower sides of the connecting rods 12 abut against the top; the counter-pressure beam 5 is positioned at the top end of the concrete pier 8, and the embedded steel bars 6 are fixedly connected with the counter-pressure beam 5; a cushion block 9 is arranged between the counter-pressure beam 5 and the concrete pier 8; the top end of the concrete pier 8 is embedded with a steel pipe 10, two ends of the steel pipe 10 are exposed on the surface of the concrete pier 8, and the bottom end of the embedded steel bar 6 is fixedly connected with the steel pipe 10; the top end of the embedded steel bar 6 penetrates through the counter-pressure beam 5 and then is fixedly connected with an anchoring part 16; the reinforcing purlins 11 connect adjacent brackets 3 together; the long thread steel bars 14 penetrate through the concrete piers 8, and two ends of the long thread steel bars 14 are fixedly connected with the brackets 3 at two opposite sides of the concrete piers 8.

The use process of the embodiment is as follows:

firstly, a bracket is arranged on a steel box 2, then a bracket 3 is arranged on the bracket, the bottom of the bracket 3 is abutted against the bracket, the bracket 3 is fixedly connected with a long thread steel bar 14, then a reinforcing purline 11 is arranged on the bracket 3, the reinforcing purline 11 connects adjacent brackets 3 together, the transverse rigidity of the bracket 3 is increased, then a second connecting rod 13 is arranged above the bracket 3, then a cushion block 9 is arranged at the top end of a concrete pier 8, then a back pressure beam 5 is arranged on the cushion block 9, then the back pressure beam 5 is fixedly connected with a pre-buried steel bar 6, then a connecting rod 12 is arranged at the lower side of the back pressure beam 5, then a jack 4 is arranged between the connecting rod 12 and the second connecting rod 13, then the jack operates, and the bottom end of the jack generates pressure on the bracket 3 under the action of the back pressure beam 5, so that the bracket 3 is pre-pressed; in addition, when the concrete pier 8 is poured, the concrete pier 8 needs to be maintained, and because the concrete pier 8 is of a large-volume concrete structure, a large amount of hydration heat exists in the structure, and cracks can be formed on the surface of the structure if the hydration heat is not dissipated timely, cold water can be introduced into the steel pipe during maintenance, so that the concrete pier 8 is cooled, and cracks are prevented from appearing in the later stage.

Claims

1. The utility model provides a continuous beam construction bracket pre-compaction device, its characterized in that, includes counter-pressure roof beam, embedded bar and is used for pushing down the jack of bracket, the jack is located the bracket top, the jack is located counter-pressure roof beam below, the embedded bar rigid coupling is on concrete pier top, the counter-pressure roof beam is located concrete pier top, embedded bar and counter-pressure roof beam rigid coupling.

2. The continuous beam construction bracket pre-pressing device as claimed in claim 1, wherein a steel pipe is pre-embedded at the top end of the concrete pier, both ends of the steel pipe are exposed on the surface of the concrete pier, and the bottom end of the pre-embedded steel bar is fixedly connected with the steel pipe.

3. The continuous beam construction bracket preloading device of claim 1, wherein a spacer is provided between the counter-pressure beam and the concrete pier.

4. The pre-pressing device for the continuous beam construction bracket as claimed in claim 1, wherein a link rod is provided at a lower side of the counter-pressing beam, a second link rod is provided at an upper side of the bracket, a lower side of the link rod abuts against a top end of the jack, and an upper side of the second link rod abuts against a bottom end of the jack.

5. The continuous beam construction bracket preloading device of claim 1, further comprising reinforcing purlins for increasing the lateral stiffness of the bracket.

6. The continuous beam construction bracket preloading device of claim 1, further comprising a steel box for limiting a corbel.

7. The pre-pressing device for the continuous beam construction bracket as claimed in claim 1, 2, 3, 4, 5 or 6, further comprising a plurality of long-thread reinforcing bars, wherein the long-thread reinforcing bars pass through the concrete pier, and both ends of the long-thread reinforcing bars are fixedly connected with the bracket.