CN111893895B - Construction method for changing single-width frame beam into double-width frame beam on bent cap - Google Patents
Construction method for changing single-width frame beam into double-width frame beam on bent cap Download PDFInfo
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- CN111893895B CN111893895B CN202010780805.8A CN202010780805A CN111893895B CN 111893895 B CN111893895 B CN 111893895B CN 202010780805 A CN202010780805 A CN 202010780805A CN 111893895 B CN111893895 B CN 111893895B
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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
Abstract
The invention relates to a construction method for changing a single-width beam erection into a double-width beam erection on a bent cap, which belongs to the field of bridge building construction, and comprises a bent cap I and a bent cap II which are transversely arranged, wherein a bridge girder erection machine comprises a No. 0 column, a No. 1 column and a No. 2 column, and comprises the following steps: 1) preparing for construction; 2) setting up a temporary support; 3) moving the column 2 of the bridge girder erection machine forwards to the position above the capping beam of the pier N; 4) the M beam is transversely moved to the right width M beam position to prepare for beam falling; 5) removing part of the temporary support; 6) completing the erection of the M-beam; 7) m-1 beam erection; 8) erecting a boundary beam L; 9) and (5) erecting an L +1 beam. The method for arranging the temporary support on the cover beam II is used for changing single-width beam erection into double-width beam erection by the bridge girder erection machine, so that the method is free from site limitation, convenient to operate and capable of improving the construction efficiency.
Description
Technical Field
The invention relates to a construction method, in particular to a construction method for changing a single-width frame beam into a double-width frame beam on a bent cap, and belongs to the field of bridge building construction.
Background
In the construction of highway bridge, the construction of bridge construction by bypassing the breakpoint needs to be changed from double-width to single-width, then the single-width to double-width bridge construction machine can normally complete the construction, but the single-width to double-width bridge construction machine cannot realize the construction. Such as: in the work progress, because the engineering reason leads to the pier not to accomplish on time and builds, lead to N, the N +1 hole roof beam body can not erect, in order not to influence total project period and reduce beam yard and deposit roof beam pressure, the decision is walked around this breakpoint and is continued forward double width frame roof beam from N +2 holes, according to present construction conditions, need pass through a hole roof beam on the crane frame, then the bridging machine just can continue forward and carry out double width frame roof beam operation, this kind of mode needs extra incremental cost, receive the restriction in bridge height and underbridge place simultaneously.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method for changing a single-width beam erection into a double-width beam erection on a bent cap, wherein the single-width beam erection into the double-width beam erection is completed by a bridge girder erection machine by arranging a temporary support on a right-width bent cap, so that the construction method is free from site limitation, convenient to operate and capable of improving the construction efficiency.
In order to solve the above problems, the specific technical scheme of the invention is as follows: a construction method for changing a single-width beam erection into a double-width beam erection on a bent cap comprises a left-width bent cap and a right-width bent cap which are transversely arranged, a bridge girder erection machine comprises a No. 0 column, a No. 1 column and a No. 2 column, the No. 2 column is a middle support, and the steps are as follows: 1) construction preparation: the No. 2 column is supported at the position of a single-width capping beam N pier, wherein the single width is the left width; 2) a temporary support is erected on the right pier capping beam; 3) moving the No. 2 column of the bridge girder erection machine forward to the position above the No. N pier capping beam, wherein the left half side of the sleeper beam is positioned on the No. N pier capping beam, and the right half side of the sleeper beam is positioned on the temporary support; 4) the M-shaped beam enters a bridge girder erection machine through the left erected beam surface by using gun carriage transportation, and moves transversely to the right M-shaped beam position to prepare for beam falling, and the No. 2 column is supported outside the width of the M-shaped beam; 5) removing a half of temporary supports corresponding to the M-shaped beam position under the sleeper beam, wherein one supporting point of the No. 2 column of the bridge girder erection machine falls on the beam surface of the erected beam on the left side, and the other supporting point falls on the temporary support at the M-1-shaped position on the right side; 6) after the M number beam falls into place, the other half of the support at the M number beam position is connected with the M number beam end steel bars into a whole to complete the erection of the M number beam; 7) the M-1 beam frame is erected as the M beam; 8) erecting a boundary beam L: adopting a bracket to support the sleeper beam or dropping the boundary beam L to the position L +1 and then moving the boundary beam L to the position L, wherein L =1, and M-1 is more than L + 1; 9) erecting a beam of No. L + 1; the steps are as same as M beam erection.
The width of the temporary support is the same as that of the cover beam, and the height of the temporary support is the same as that of the preset beam.
The invention has the following beneficial effects: according to the method for building the temporary support on the right capping beam, the single-width beam erection is changed into the double-width beam erection by the bridge girder erection machine, the limitation of a field is not required, the operation is convenient, and the construction efficiency is improved.
Drawings
Fig. 1 is a schematic view of a temporary stent erection structure.
Fig. 2 is a construction schematic diagram of the bridge girder erection machine.
Fig. 3 is a schematic view of the structure of the edge beam.
Fig. 4 is a schematic diagram of the construction of the bridge girder erection machine.
Detailed Description
As shown in fig. 1 to 4, a construction method for changing a single-width beam erection into a double-width beam erection on a bent cap comprises a left-width bent cap 1 and a right-width bent cap 2 which are transversely arranged, a bridge girder erection machine 3 comprises a No. 0 column, a No. 1 column and a No. 2 column, the No. 2 column is a middle support, and the steps are as follows: 1) construction preparation: the No. 2 column is supported at the position of a single-width capping beam N pier, wherein the single width is the left width; 2) a temporary support 5 is erected on the right cover beam 2; 3) moving the No. 2 column of the bridge girder erection machine 3 forwards to the position above the No. N pier capping beam, wherein the left half side of the sleeper beam 6 is positioned on the left capping beam 1, and the right half side of the sleeper beam is positioned on the temporary support 5; 4) the M-shaped beam 7 is transported to enter a bridge girder erection machine 3 through the erected beam surface of the left-width capping beam 1 by using a gun carriage, and moves transversely to the position of the right-width M-shaped beam 7 to prepare for beam falling, and the No. 2 column is supported outside the length of the M-shaped beam 7; 5) removing a half of the temporary support 5 corresponding to the position 7 of the M-shaped beam under the sleeper beam 6, wherein one supporting point of the No. 2 column of the bridge girder erection machine 3 falls on the beam surface of the erected beam on the left side, and the other supporting point falls on the temporary support 5 at the position M-1 on the right side; 6) after the M number beam is in place, the other half bracket at the 7 position of the M number beam is connected with the reinforcing steel bar at the 7 end of the M number beam into a whole to complete the erection of the M number beam; 7) the M-1 beam frame is the same as the M beam 7 frame; 8) erecting the boundary beam 4: a corbel is adopted to support the sleeper beam 6 or the boundary beam 4 is dropped to the position L +1 and then moved to the boundary beam 4, wherein L =1, and M-1 is more than L + 1; 9) erecting a beam of No. L + 1; the steps are as same as the erection of the M-shaped beam 7.
The width of the temporary support 5 is the same as that of the cover beam, and the height of the temporary support is the same as that of the preset beam.
Example (b): 1. the bridge girder erection machine 3 is erected through 18#, 19#, 20# holes in the left width from double width to single width and is stopped at the 20# hole to prepare for erecting the 20# hole in the right width, and at the moment, the No. 2 column of the bridge girder erection machine 3 is supported at the front end of the No. 19 hole and is close to the No. 19 pier.
2. And (3) making a temporary support 5 on the right capping beam 2, wherein the width of the temporary support 5 is the same as the width of the capping beam, and the height of the temporary support is the same as the height of the beam. The support is used for supporting a No. 2 column of the bridge girder erection machine 3, the No. 2 column is a double column and is a fixed end of the bridge girder erection machine 3 and bears horizontal force generated by girder erection, the buttress is arranged in a detachable mode and can bear load and longitudinal and transverse horizontal force of the girder erection when being integrally connected, and single girder installation can be met during detachment.
3. A left cover beam 1 conveys a beam 4 to a bridge girder erection machine 3, the beam is transversely moved to the right beam 4 to be dropped, a column 2 is supported outside the beam 4 in width, a lower support of a sleeper beam 6 can be detached, a half temporary support 5 on the cover beam at the beam 4 is detached independently, the front sleeper beam 6 is suspended, the rear sleeper beam is also suspended on the temporary support 5, in addition, a second column fulcrum of the bridge girder erection machine 3 is arranged on the temporary support 3 of the bridge deck and the right cover beam 2 after the left cover beam 1 is erected, so the system safety can be ensured, when the dropped beam is moved forwards, the dropped beam is limited by a beam of a column walking part 1, a 'Z' -shaped roundabout dropped beam shifting is needed, the beam body needs to be obliquely arranged in the limit, the sliding force of the steel wire rope on the beam body needs to be detected, the steel wire rope needs to be fixed and prevented from shifting, when the beam body is obliquely arranged, a lifting rope is vertical, the bridge girder erection machine 3 has no influence, the dropped beam 4 is put in place, and connecting the other half of the temporary support 5 at the No. 4 beam position and the No. 4 beam end reinforcing steel bars into a whole to finish the No. 4 beam erection, and finishing the No. 3 beam erection by the same method.
4. No. 1 boundary beam 4 will be prior to No. 2 roof beam, No. 1 boundary beam 4 erects because the flange plate of boundary beam 4 is wider than bent cap length, need do special bracket support sleeper beam 6, or adopt and fall No. 1 boundary beam 4 at No. two positions, 3 transverse shift to the left side of bridging machine, No. 1 roof beam is by 2 manual methods transverse shift take one's place, accomplish 2 roof beams frame roof beams like 4 roof beams methods finally.
What has been described above is merely a preferred embodiment of the invention. It should be noted that variations and modifications can be made by those skilled in the art without departing from the principle of the present invention, and they should also be considered as falling within the scope of the present invention.
Claims (2)
1. The utility model provides a construction method that single width of cloth frame roof beam becomes double width of cloth frame roof beam for on bent cap, including horizontal left side bent cap and the right side bent cap that sets up, the bridge girder erection machine includes No. 0 post, No. 1 post and No. 2 post, and No. 2 post is well pillar, its characterized in that following step: 1) construction preparation: the No. 2 column is supported at the position of a single-width capping beam N pier, wherein the single width is the left width; 2) a temporary support is erected on the right pier capping beam; 3) moving the No. 2 column of the bridge girder erection machine forward to the position above the No. N pier capping beam, wherein the left half side of the sleeper beam is positioned on the No. N pier capping beam, and the right half side of the sleeper beam is positioned on the temporary support; 4) the M-shaped beam enters a bridge girder erection machine through the left erected beam surface by using gun carriage transportation, and moves transversely to the right M-shaped beam position to prepare for beam falling, and the No. 2 column is supported outside the length of the M-shaped beam; 5) removing a half of temporary supports corresponding to the M-shaped beam position under the sleeper beam, wherein one supporting point of the No. 2 column of the bridge girder erection machine falls on the beam surface of the erected beam on the left side, and the other supporting point falls on the temporary support at the M-1-shaped position on the right side; 6) after the M-shaped beam is dropped into place, the other half of the temporary support at the M-shaped beam position is connected with the reinforcing steel bars at the M-shaped beam end to form a whole, and the M-shaped beam is erected; 7) the M-1 beam frame is erected as the M beam; 8) erecting a boundary beam L: adopting a bracket to support the sleeper beam or dropping the boundary beam L to the position L +1 and then moving the boundary beam L to the position L, wherein L =1, and M-1 is more than L + 1; 9) erecting a beam of No. L + 1; the steps are as same as M beam erection.
2. The construction method of a single-width girder to a double-width girder for a capping as claimed in claim 1, wherein: the width of the temporary support is the same as that of the cover beam, and the height of the temporary support is the same as that of the preset beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010780805.8A CN111893895B (en) | 2020-08-06 | 2020-08-06 | Construction method for changing single-width frame beam into double-width frame beam on bent cap |
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| CN202010780805.8A CN111893895B (en) | 2020-08-06 | 2020-08-06 | Construction method for changing single-width frame beam into double-width frame beam on bent cap |
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| CN111893895B true CN111893895B (en) | 2022-05-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112853989A (en) * | 2021-01-15 | 2021-05-28 | 中铁九局集团有限公司 | Single-line and double-line head hole transition erection method for high-speed railway post-tensioned prestressing simply supported box girder |
| CN113832863B (en) * | 2021-10-14 | 2023-06-16 | 中铁十九局集团广州工程有限公司 | Method for double-frame bridge |
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| CN105442452A (en) * | 2015-11-13 | 2016-03-30 | 中铁大桥局集团第一工程有限公司 | Device and method for splicing double width bridge steel girder |
| CN108532463A (en) * | 2018-03-13 | 2018-09-14 | 中交二航局第二工程有限公司 | The traversing luffing method of Large-scale Bridge Erector |
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| CN110552292A (en) * | 2019-08-05 | 2019-12-10 | 中交一公局第二工程有限公司 | construction method for changing single-width into double-width beam erection of integral bridge span |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8671490B1 (en) * | 2013-03-06 | 2014-03-18 | Mark Carney | Bridge span replacement system |
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