CN111074794A - Prepressing system for hanging basket of cantilever beam - Google Patents
Prepressing system for hanging basket of cantilever beam Download PDFInfo
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- CN111074794A CN111074794A CN201911365525.4A CN201911365525A CN111074794A CN 111074794 A CN111074794 A CN 111074794A CN 201911365525 A CN201911365525 A CN 201911365525A CN 111074794 A CN111074794 A CN 111074794A
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- basket
- cantilever
- support
- casting beam
- casting
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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
- E01D21/10—Cantilevered erection
- E01D21/105—Balanced cantilevered erection
Abstract
The invention discloses a prepressing system for a suspension casting beam hanging basket, which comprises a support arranged at the end part of a suspension casting beam, a bottom basket arranged below the suspension casting beam and positioned below the support, and a power device arranged below the support and used for applying pressure to the bottom basket. The invention has the beneficial effects that: this scheme can apply thrust to end basket through power device and realize carrying out the pre-compaction to hanging the basket, need not use the balancing weight, saved the manufacturing of balancing weight, the transportation, the installation, reduce the consumption of material, it is extravagant, be favorable to reducing construction cost, shorten construction cycle, improve the efficiency of construction, avoid the balancing weight to pile up and the safe risk that exists, most structure of this scheme can used repeatedly, and whole weight is less than the balancing weight sum and be convenient for remove, can effectively reduce construction cost.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a prepressing system for a hanging basket of a suspended casting beam.
Background
The pre-pressing of the hanging basket is an important process for the hanging basket construction of the suspension casting continuous beam, and is used for determining whether the bearing of the hanging basket meets the design requirements and eliminating the inelastic deformation. Conventionally, a concrete block or a steel material is adopted for preloading.
According to the traditional prepressing method, a large amount of counterweight materials need to be manufactured and transported backwards, the counterweight materials are hoisted to a cradle platform, and the materials are hoisted and transported away after prepressing is completed. If the two sides of each precast concrete block 1t are subjected to balanced pre-pressing, calculated according to the pre-pressing weight of 200t, 400 precast blocks are required. The process of ann tearing open consumes a large amount of manpower and materials, and has transportation inconvenience, cyclic utilization is low, the cycle length, the extravagant serious scheduling problem of material to hang basket platform area is limited, and the higher danger coefficient that the surcharge is big more, and pre-compaction weight precision is difficult to control simultaneously.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a prepressing system for a suspended casting beam hanging basket, which is used for realizing accurate prepressing, reducing the material consumption required by prepressing, reducing the waste and improving the efficiency and the precision of the prepressing.
The invention is realized by the following technical scheme: the utility model provides a pre-compaction system for hanging basket of cantilever beam, including set up at the support of cantilever beam tip, set up in cantilever beam below and be located the end basket of support below, set up in the support below and be used for exerting pressure's power device to the end basket.
Further, in order to better realize the invention, the bottom basket is horizontally suspended below the suspension casting beam.
Furthermore, in order to better realize the invention, the cantilever beam is provided with a counter-pulling block, the counter-pulling block is provided with a B connecting piece which passes through the cantilever beam and is connected with one end of the bottom basket, and a top basket which is connected with the other end of the bottom basket through a plurality of A connecting pieces is arranged above the cantilever beam.
Furthermore, in order to better realize the invention, the bracket is a right-angled triangle, one right-angled edge of the bracket is connected with the end part of the suspension casting beam, and the other right-angled edge is arranged close to the bottom basket.
Furthermore, in order to better realize the invention, a main cross beam with the length direction vertical to the length direction of the suspended casting beam is arranged between the power device and the bottom basket.
Further, in order to better realize the invention, the power device adopts a jack.
Furthermore, in order to better realize the invention, the end part of the cantilever beam is provided with an embedded part, and the bracket is welded with the embedded part.
The beneficial effect that this scheme obtained is:
this scheme can apply thrust to end basket through power device and realize carrying out the pre-compaction to hanging the basket, need not use the balancing weight, saved the manufacturing of balancing weight, the transportation, the installation, reduce the consumption of material, it is extravagant, be favorable to reducing construction cost, shorten construction cycle, improve the efficiency of construction, avoid the balancing weight to pile up and the safe risk that exists, most structure of this scheme can used repeatedly, and whole weight is less than the balancing weight sum and be convenient for remove, can effectively reduce construction cost.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
the device comprises a base, a connecting piece 1-B, a bottom basket 2-3-A, a connecting piece 4-B, a counter-pulling block 5-6-a cantilever beam 7-a bracket 8-a power device and a main beam 9-a main beam.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1:
as shown in fig. 1, in this embodiment, a pre-pressing system for a suspended casting beam hanging basket includes a bracket 7 disposed at an end of a suspended casting beam 6, a bottom basket 2 disposed below the suspended casting beam 6 and below the bracket 7, and a power device 8 disposed below the bracket 7 and used for applying pressure to the bottom basket 2.
This scheme utilizes power device 8 to exert thrust to end basket 2 and carry out the pre-compaction in order to realize carrying out the basket to hanging, and through the pressure size of control power device 8 output, the pre-compaction of simulation different weight measures under the condition of different pre-pressings, and the elastic deformation and the inelastic deformation value of end basket 2. This scheme has saved and has used the balancing weight, avoids processes such as preparation balancing weight, transportation balancing weight, installation balancing weight to be favorable to shortening construction cycle, improve the efficiency of construction. Meanwhile, the safety risk caused by stacking of the balancing weights is avoided.
Also can receive reaction force when power device 8 output pressure, at the pre-compaction in-process, hang the both ends of watering roof beam 6 and can not have the unbalanced phenomenon of load, can hang 2 pre-compaction of the end basket of watering roof beam 6 certain one end alone to hanging, also can hang the both ends of watering roof beam 6 simultaneously and set up the pre-compaction system and carry out the pre-compaction.
In this embodiment, the bottom basket 2 is horizontally suspended below the cantilever beam 6.
The cantilever casting beam 6 is provided with a pulling block 5, the pulling block 5 is provided with a B connecting piece 4 which penetrates through the cantilever casting beam 6 and is connected with one end of the bottom basket 2, and a top basket 1 which is connected with the other end of the bottom basket 2 through a plurality of A connecting pieces 3 is arranged above the cantilever casting beam 6. The connecting pieces A and B3 are steel ropes or steel rods.
In this embodiment, the support 7 is a right triangle, one of the right-angle sides of the support 7 is connected with the end of the cantilever beam 6, and the other right-angle side is arranged close to the bottom basket 2. Two flush supports 7 are arranged at the same end of the cantilever beam 6, and the two supports 7 are symmetrically arranged on two sides of the end part of the cantilever beam 6 respectively. Design support 7 for right-angled triangle can guarantee that support 7 self rigidity satisfies the user demand, prevents that support 7 atress from being out of shape and influencing the effect and the measuring precision of pre-compaction. Set up two supports 7 and be favorable to guaranteeing that end basket 2 is balanced by pressure, prevent end basket 2 and heels and influence measurement accuracy.
The bracket 7 can be made of I-steel by welding.
In this embodiment, the power device 8 adopts a 400-ton tensioning jack, the two ends of the suspended casting beam 6 are simultaneously pre-pressed, four power devices 8 are adopted for symmetrical graded loading, and the loading is divided into three stages of 60%, 100% and 120%
When the jack was loaded to 60%, the load was maintained for 30 minutes and the amount of deformation of the bottom basket 2 was measured.
When the jack was loaded to 100%, the load was maintained for 30 minutes and the amount of deformation of the bottom basket 2 was measured.
When the jack was loaded to 120%, the load was maintained for 60 minutes and the amount of deformation of the bottom basket 2 was measured.
And (3) keeping the loading of the tensioning jack at 120%, continuously pre-pressing for a plurality of hours, measuring the deformation amount once every other hour, finishing when the difference of the deformation amounts of two times in the last measurement time period is less than 2mm, and then gradually unloading according to the same weight of the step-by-step loading.
Example 2:
on the basis of the above embodiment, in the present embodiment, a main beam 9 whose length direction is perpendicular to the length direction of the cantilever beam 6 is arranged between the power device 8 and the bottom basket 2. The main beam 9 is used for bearing the jack, and the height difference between the jack and the bottom basket 2 is filled.
The top basket 1 is welded into a frame structure by adopting I-shaped steel, so that the weight of the top basket 1 is favorably reduced, the transportation and the installation are facilitated, the A connecting piece 3 is favorably kept vertical and the stability of the bottom basket 2 is favorably improved by extending the top basket 1 out of the cantilever beam 6, and the influence on the measurement precision caused by the bending moment borne by the bottom basket 2 is avoided. In this embodiment, the top basket 1 includes side frames disposed on both sides of the upper surface of the cantilever beam 6 and a connecting rod connected between the side frames, the side frames are formed by combining five h-shaped steels, the five h-shaped steels form two triangles sharing one side, two h-shaped steels oppositely disposed are parallel to the cantilever beam 6, and the end portions of the h-shaped steels are connected with the connecting rod.
The I-shaped steel is formed into a triangle, so that the rigidity of the top basket 1 can be increased, and the deformation resistance and stability of the top basket are enhanced, thereby being beneficial to ensuring the construction safety. An adjustable frame structure can be formed between the I-shaped steel and the connecting block in a hinged mode, a sliding block mode and the like, and therefore the length of the top basket 1 extending out of the cantilever beam 6 can be adjusted according to needs.
The end part of the cantilever beam 6 is provided with an embedded part, and the bracket 7 is welded with the embedded part. Therefore, the connection strength of the bracket 7 and the cantilever beam 6 is ensured, and the bracket 7 is prevented from being disconnected from the cantilever beam 6 under the reaction force of the jack. In this embodiment, the built-in fitting can pre-buried steel sheet in order to be regarded as the welding basis of support 7, also can set up the preformed hole so that installation reinforcing bar auxiliary stay support 7 near the pre-buried steel sheet.
In this embodiment, other undescribed contents are the same as those in the above embodiment, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. The utility model provides a pre-compaction system for hanging basket of cantilever beam which characterized in that: the device comprises a support (7) arranged at the end part of a cantilever beam (6), a bottom basket (2) arranged below the cantilever beam (6) and positioned below the support (7), and a power device (8) arranged below the support (7) and used for applying pressure to the bottom basket (2).
2. The pre-pressing system for the suspended casting beam hanging basket according to claim 1, characterized in that: the bottom basket (2) is horizontally suspended below the suspension casting beam (6).
3. The pre-pressing system for the suspended casting beam hanging basket of claim 2, characterized in that: the cantilever casting device is characterized in that a counter-pulling block (5) is arranged on the cantilever casting beam (6), a B connecting piece (4) which penetrates through the cantilever casting beam (6) and is connected with one end of the bottom basket (2) is arranged on the counter-pulling block (5), and a top basket (1) which is connected with the other end of the bottom basket (2) through a plurality of A connecting pieces (3) is arranged above the cantilever casting beam (6).
4. The pre-pressing system for the suspended casting beam hanging basket of claim 3, characterized in that: the support (7) is a right triangle, one of the right-angle sides of the support (7) is connected with the end part of the suspension casting beam (6), and the other right-angle side is arranged close to the bottom basket (2).
5. A pre-pressing system for a suspended casting beam basket according to any one of claims 1, 2, 3, 4, characterized in that: and a main cross beam (9) with the length direction vertical to the length direction of the cantilever beam (6) is arranged between the power device (8) and the bottom basket (2).
6. The pre-pressing system for the suspended casting beam hanging basket of claim 5, characterized in that: the power device (8) adopts a jack.
7. A pre-pressing system for a suspended casting beam basket according to any one of claims 1, 2, 3, 4, 6, characterized in that: the end part of the cantilever beam (6) is provided with an embedded part, and the bracket (7) is welded with the embedded part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911365525.4A CN111074794A (en) | 2019-12-26 | 2019-12-26 | Prepressing system for hanging basket of cantilever beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911365525.4A CN111074794A (en) | 2019-12-26 | 2019-12-26 | Prepressing system for hanging basket of cantilever beam |
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| CN111074794A true CN111074794A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911365525.4A Pending CN111074794A (en) | 2019-12-26 | 2019-12-26 | Prepressing system for hanging basket of cantilever beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164771A (en) * | 2021-11-22 | 2022-03-11 | 甘肃建投临夏建设管理有限公司 | Prepressing device and prepressing method for viaduct cantilever casting hanging basket |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204023424U (en) * | 2014-08-14 | 2014-12-17 | 江苏省交通工程集团有限公司 | A kind of Hanging Basket You Ding back-pressure mechanism |
| CN204849607U (en) * | 2015-06-03 | 2015-12-09 | 中铁建大桥工程局集团第五工程有限公司 | A continuous beam string basket pre -compaction device for bridge construction |
| CN110359374A (en) * | 2019-07-29 | 2019-10-22 | 中铁七局集团路桥工程有限公司 | A kind of Hanging Basket precompressed counter-force bracket and its construction method |
-
2019
- 2019-12-26 CN CN201911365525.4A patent/CN111074794A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204023424U (en) * | 2014-08-14 | 2014-12-17 | 江苏省交通工程集团有限公司 | A kind of Hanging Basket You Ding back-pressure mechanism |
| CN204849607U (en) * | 2015-06-03 | 2015-12-09 | 中铁建大桥工程局集团第五工程有限公司 | A continuous beam string basket pre -compaction device for bridge construction |
| CN110359374A (en) * | 2019-07-29 | 2019-10-22 | 中铁七局集团路桥工程有限公司 | A kind of Hanging Basket precompressed counter-force bracket and its construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164771A (en) * | 2021-11-22 | 2022-03-11 | 甘肃建投临夏建设管理有限公司 | Prepressing device and prepressing method for viaduct cantilever casting hanging basket |
| CN114164771B (en) * | 2021-11-22 | 2023-09-12 | 甘肃建投临夏建设管理有限公司 | Prepressing device and prepressing method for overhead bridge cantilever pouring hanging basket |
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Application publication date: 20200428 |