CN217325078U - Bearing platform cofferdam system suitable for bridge pier restoration of existing bridge - Google Patents
Bearing platform cofferdam system suitable for bridge pier restoration of existing bridge Download PDFInfo
- Publication number
- CN217325078U CN217325078U CN202221004180.7U CN202221004180U CN217325078U CN 217325078 U CN217325078 U CN 217325078U CN 202221004180 U CN202221004180 U CN 202221004180U CN 217325078 U CN217325078 U CN 217325078U
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- bottom plate
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- cofferdam
- support frame
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000007667 floating Methods 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 239000000725 suspension Substances 0.000 claims abstract description 3
- 230000006835 compression Effects 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000007789 sealing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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Classifications
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a be suitable for cushion cap cofferdam system that existing bridge restoration pier was used, include: the suspension mechanism is provided with a support frame arranged at the top of the existing bridge pier, and a plurality of lifting appliances are arranged on the support frame; the cofferdam box has the setting at existing open caisson basis top and with the steel structure prefab that the hoist links to each other to and the sealed cast-in-place bottom plate that links to each other with existing pier and existing open caisson basis, be provided with anti floating support between cast-in-place bottom plate and the support frame. The utility model discloses stable in structure, safe and reliable, its easily construction, with the material economize, with low costs, not only can play the effect that the river was kept apart to the cofferdam, can also be used as the template of cushion cap construction, greatly saved construction cost, improved the efficiency of construction, cooperated going on smoothly of the whole replacement work of existing bridge pier effectively.
Description
Technical Field
The utility model belongs to the technical field of bridge maintenance construction technique and specifically relates to a be suitable for cushion cap cofferdam system that existing bridge restoration pier was used.
Background
Under the repeated action of vehicle load, the bridge deck concrete is easy to crack and break, and on the contrary, the crack repairing technology is usually adopted to restore the bridge to a good state and then to be reused. However, for the situation that the bridge pier has cracks, the safety of the bridge pier is not guaranteed enough only through repairing, and an old bridge is often abandoned to rebuild a new bridge, so that the investment is high, the construction period is long, and the normal traffic operation is influenced. In order to change such a situation, it is considered to replace the bridge pier as a whole on the basis of the existing open caisson. Because the bridge piers of the existing bridge are positioned in river water, when the water level of the river water is not changed greatly, part of the construction area is still positioned in the water even in the dry season. In order to speed up the construction and improve the construction safety, a cofferdam construction method is usually adopted. However, at present, a cofferdam technology for bridge pier repair is not available.
Disclosure of Invention
In order to solve the problem, the utility model provides a simple structure, swift safe cushion cap cofferdam system that is suitable for existing bridge restoration pier of being under construction specifically can take following technical scheme:
be suitable for cushion cap cofferdam system that existing bridge restoration pier was used, include
The suspension mechanism is provided with a support frame arranged at the top of the existing bridge pier, and a plurality of lifting appliances are arranged on the support frame;
the cofferdam box has the setting at existing open caisson basis top and with the steel structure prefab that the hoist links to each other to and the sealed cast-in-place bottom plate that links to each other with existing pier and existing open caisson basis, be provided with anti floating support between cast-in-place bottom plate and the support frame.
The support frame is composed of a transverse carrying pole beam and a longitudinal carrying pole beam which are connected in a welding mode, and a steel plate cushion layer is arranged between the support frame and the existing steel box beam above the support frame.
The steel constructs the prefab including setting up at the bottom plate skeleton at existing open caisson basis top, setting be in double-deck lateral wall skeleton around the bottom plate skeleton and with the resistance to compression frame that double-deck lateral wall skeleton links to each other, all be provided with existing pier through-hole on resistance to compression frame and the bottom plate skeleton, and the bottom of bottom plate skeleton and the both sides of double-deck lateral wall skeleton all are provided with sealed steel sheet.
And a channel steel inclined strut is arranged between the double-layer side wall frameworks.
The lifting appliance is connected with a pressure-resistant frame positioned at the top of the cofferdam box body.
The anti-floating support is connected with the bottom plate framework in a welding mode, and the bottom of the anti-floating support is embedded in the cast-in-place bottom plate.
The anti-floating support segments are arranged between the cast-in-place bottom plate and the compression-resistant frames, between the adjacent compression-resistant frames and between the compression-resistant frames and the support frames.
The novel open caisson is characterized in that a newly-built pile foundation is arranged around the existing open caisson foundation, the bottom of the newly-built pile foundation is arranged in the riverbed hard rock, and the top of the newly-built pile foundation is arranged in the cast-in-place bottom plate.
The utility model provides a be suitable for cushion cap cofferdam system that existing bridge restoration pier was used, the steel structure prefab of its cofferdam box links to each other with existing pier through suspending in midair the mechanism, the steel structure prefab bottom then forms the bottom plate that links to each other with existing open caisson basis and existing pier are sealed through the mode of cast in situ concrete, the bottom plate is provided with anti-floating support with suspending in midair between the support frame of mechanism, a displacement is produced to the cofferdam box under buoyancy, and the resistance to compression frame in the cofferdam box then is used for balanced outside water pressure, prevent that the cofferdam box from taking place to damage under outside water pressure. The utility model discloses stable in structure, safe and reliable, its easily construction, with the material economize, with low costs, not only can play the effect that the river was kept apart to the cofferdam, can also be used as the template of cushion cap construction, greatly saved construction cost, improved the efficiency of construction, cooperated going on smoothly of the whole replacement work of existing bridge pier effectively.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Figure 2 is a cross-sectional view a-a of figure 1 (without the cast-in-place floor).
Fig. 3 is a sectional view taken along line B-B in fig. 1.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific construction processes are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1-3, be suitable for existing bridge to restore cushion cap cofferdam system that pier was used, including suspending mechanism and cofferdam box in midair, wherein, suspend the mechanism in midair and constitute by the support frame and the hoist that is located it, specifically, the support frame comprises horizontal shoulder pole roof beam 11 and vertical shoulder pole roof beam 12 that the welding links to each other, vertical shoulder pole roof beam 12 is located the lower floor, along setting up at existing pier M top along the bridge direction, horizontal shoulder pole roof beam 11 is located the upper strata, along the horizontal bridge to setting up in existing steel box girder N below, furthermore, in order to avoid the uneven removal that takes place of support frame atress, install the steel sheet bed course between horizontal shoulder pole roof beam 11 and existing steel box girder N, with reinforcing overall structure stability. The hoist can be selected according to specific operating mode, adopts 4 20 tons chain block and 4 10 tons chain block in this embodiment, links to each other it with the cofferdam box, can transmit the whole support frames of vertical gravity load that the cofferdam box produced.
The cofferdam box body comprises a steel structure prefabricated member which is arranged at the top of the existing open caisson foundation G and is connected with a lifting appliance, and a cast-in-situ bottom plate 2 which is connected with the existing bridge pier M and the existing open caisson foundation G in a sealing way. The steel constructs the prefab including being located the bottom plate skeleton 21 at existing open caisson basis G top, setting up double-deck lateral wall skeleton 22 around bottom plate skeleton 21 and the resistance to compression frame 23 that links to each other with double-deck lateral wall skeleton 22, wherein, all be provided with existing pier through-hole 24 on resistance to compression frame 23 and the bottom plate skeleton 21, and the bottom of bottom plate skeleton 21 and the both sides of double-deck lateral wall skeleton 22 all are provided with sealed steel sheet 25.
Specifically, the bottom plate framework 21 is a transverse bridge-direction framework composed of 4 channels of 356mm i-steel, and a forward bridge-direction framework composed of 150mm channel-steel with an interval of 0.5m, and is sealed at the bottom of the framework by welding 6mm steel plates (i.e., sealing steel plates 25). In order to ensure the reserved hole gaps of the existing bridge pier M and the newly-built pile foundation J (arranged around the existing open caisson foundation G and inserted into the riverbed hard rock at the bottom part), the concrete positions of the pile foundations need to be measured on site and cut and welded when the bottom plate framework 21 is installed on the sealing steel plate 25. The double-layer side wall framework 22 comprises two rows of 100mm channel steel arranged vertically at an interval of 80cm, 100mm angle iron welded at an interval of 50cm on each row of vertical channel steel, 100mm channel steel welded between the two rows of vertical channel steel serves as an inclined strut, and two ends of the inclined strut are connected with 6mm steel plates (namely, sealing steel plates 25) welded on two sides of the framework respectively. The sealing steel plate 25 positioned on the inner side of the framework has the same size as the bearing platform, and can be used as a side mold when the bearing platform concrete is poured. Because the internal and external water level difference of the cofferdam box exists, the external wall of the cofferdam box will be acted by water pressure, so the cofferdam box is provided with two layers of compression-resistant frames 23 at the bottom opening and the upper opening. The compression-resistant frame 23 at the lower opening is born by the bottom plate framework 21 of the cofferdam box body, and the compression-resistant frame 23 at the upper opening is composed of 356mm I-steel. Wherein, the compression frames 23 at the upper and lower openings are vertically connected by 8-position 20mm steel bars so as to bear the vertical load caused by the cofferdam box body and the bearing platform concrete when the buoyancy at low water level is small; simultaneously, adopt 4 356I-steel welding rigid connection between the resistance to compression frame 23 of department on the cofferdam box, set up 4 vertical 356mm I-steel and the vertical shoulder pole roof beam 12 welding rigid connection of mound top on the resistance to compression frame 23 of department on the cofferdam box, thereby form the anti-floating support 3 that the segmentation set up, transmit the buoyancy of river to the cofferdam box to the support frame, because the support frame is fixed with existing pier shaft, therefore can resist the upwards buoyancy that receives during the high water level when guaranteeing cofferdam box wholeness, ensure that the cofferdam box can not the come-up.
After the cofferdam box is installed on the water surface (including connecting the lifting appliance with the compression-resistant frame 23 at the upper opening of the cofferdam box), the cofferdam box descends into the water, the bottom plate directly sits on the existing open caisson foundation G, then, the underwater concrete with the thickness of 65cm is poured at the bottom of the cofferdam box to be sealed to form a cast-in-place bottom plate 2 (the top of a new pile foundation J and the bottom of an anti-floating support 3 are both buried in the cast-in-place bottom plate 2), the upper surface of the cast-in-place bottom plate 2 is the bottom surface of the new pile foundation C, and the reinforcement of the pile foundation can be carried out after the concrete equal strength and the water inside are extracted.
The utility model has the characteristics of the time limit for a project is short, and water resistance is little, does benefit to the navigation, and the construction degree of difficulty is little, and the concrete volume is few etc, can effectually accelerate the construction progress, and safety and economic benefits are showing. Through calculating, compare in traditional cofferdam construction process, the utility model discloses can save steel about 175 tons altogether, concrete 725 side, the direct economic benefits who produces are: 35 × 5 × 1200+145 × 5 × 500=572500 dollars, which can greatly reduce the amount of concrete construction in water, reduce the influence on the living things in river water, and protect the local environment.
It should be noted that in the description of the present invention, terms of orientation or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (8)
1. The utility model provides a be suitable for cushion cap cofferdam system that existing bridge restoration pier was used which characterized in that: comprises that
The suspension mechanism is provided with a support frame arranged at the top of the existing bridge pier, and a plurality of lifting appliances are arranged on the support frame;
the cofferdam box has the setting at existing open caisson basis top and with the steel structure prefab that the hoist links to each other to and the sealed cast-in-place bottom plate that links to each other with existing pier and existing open caisson basis, be provided with anti floating support between cast-in-place bottom plate and the support frame.
2. The bearing platform cofferdam system for the existing bridge restoration pier according to claim 1, wherein: the support frame is composed of a transverse carrying pole beam and a longitudinal carrying pole beam which are connected in a welding mode, and a steel plate cushion layer is arranged between the support frame and the existing steel box beam above the support frame.
3. The bearing platform cofferdam system for the existing bridge restoration pier according to claim 1, wherein: the steel constructs the prefab including setting up at the bottom plate skeleton at existing open caisson basis top, setting and be in double-deck lateral wall skeleton around the bottom plate skeleton and with the resistance to compression frame that double-deck lateral wall skeleton links to each other, all be provided with existing pier through-hole on resistance to compression frame and the bottom plate skeleton, and the bottom of bottom plate skeleton and the both sides of double-deck lateral wall skeleton all are provided with sealed steel sheet.
4. The bearing platform cofferdam system for the existing bridge restoration pier according to claim 3, wherein: and a channel steel inclined strut is arranged between the double-layer side wall frameworks.
5. The bearing platform cofferdam system for the existing bridge restoration pier according to claim 3, wherein: the lifting appliance is connected with a pressure-resistant frame positioned at the top of the cofferdam box body.
6. The bearing platform cofferdam system for the existing bridge restoration pier according to claim 1, wherein: the anti-floating support is connected with the bottom plate framework in a welding mode, and the bottom of the anti-floating support is embedded in the cast-in-place bottom plate.
7. The bearing platform cofferdam system for the existing bridge restoration pier according to claim 6, wherein: the anti-floating support segments are arranged between the cast-in-place bottom plate and the compression-resistant frames, between the adjacent compression-resistant frames and between the compression-resistant frames and the support frames.
8. The bearing platform cofferdam system for the existing bridge restoration pier according to claim 1, wherein: the novel open caisson is characterized in that a newly-built pile foundation is arranged around the existing open caisson foundation, the bottom of the newly-built pile foundation is arranged in the riverbed hard rock, and the top of the newly-built pile foundation is arranged in the cast-in-place bottom plate.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221004180.7U CN217325078U (en) | 2022-04-28 | 2022-04-28 | Bearing platform cofferdam system suitable for bridge pier restoration of existing bridge |
| PCT/CN2023/082440 WO2023207420A1 (en) | 2022-04-28 | 2023-03-20 | Bearing platform cofferdam system suitable for repairing bridge pier of existing bridge |
| LU505084A LU505084B1 (en) | 2022-04-28 | 2023-03-20 | Bearing platform cofferdam system suitable for repairing pier of existing bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221004180.7U CN217325078U (en) | 2022-04-28 | 2022-04-28 | Bearing platform cofferdam system suitable for bridge pier restoration of existing bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217325078U true CN217325078U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221004180.7U Active CN217325078U (en) | 2022-04-28 | 2022-04-28 | Bearing platform cofferdam system suitable for bridge pier restoration of existing bridge |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN217325078U (en) |
| LU (1) | LU505084B1 (en) |
| WO (1) | WO2023207420A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023207420A1 (en) * | 2022-04-28 | 2023-11-02 | 中铁七局集团有限公司 | Bearing platform cofferdam system suitable for repairing bridge pier of existing bridge |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4281567B2 (en) * | 2004-02-13 | 2009-06-17 | 株式会社大林組 | Reinforcement structure of existing pier foundation and reinforcement method of existing pier foundation |
| CN103397648B (en) * | 2013-08-12 | 2015-04-01 | 中铁二局股份有限公司 | Cofferdam reinforced concrete secondary bottom-sealing construction method of steel pouring jacket with bottom |
| CN213572000U (en) * | 2020-09-25 | 2021-06-29 | 中铁大桥局武汉桥梁特种技术有限公司 | Steel boxed cofferdam |
| CN214940288U (en) * | 2021-03-19 | 2021-11-30 | 中铁大桥局集团有限公司 | Anti-floating and anti-sinking steel pile casing and cofferdam |
| CN217325078U (en) * | 2022-04-28 | 2022-08-30 | 中铁七局集团有限公司海外公司 | Bearing platform cofferdam system suitable for bridge pier restoration of existing bridge |
-
2022
- 2022-04-28 CN CN202221004180.7U patent/CN217325078U/en active Active
-
2023
- 2023-03-20 LU LU505084A patent/LU505084B1/en active
- 2023-03-20 WO PCT/CN2023/082440 patent/WO2023207420A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023207420A1 (en) * | 2022-04-28 | 2023-11-02 | 中铁七局集团有限公司 | Bearing platform cofferdam system suitable for repairing bridge pier of existing bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| LU505084B1 (en) | 2024-01-15 |
| LU505084A1 (en) | 2023-11-09 |
| WO2023207420A1 (en) | 2023-11-02 |
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