CN110541364A - Bridge bent cap segmented prefabrication, assembly and fixation method - Google Patents
Bridge bent cap segmented prefabrication, assembly and fixation method Download PDFInfo
- Publication number
- CN110541364A CN110541364A CN201910830540.5A CN201910830540A CN110541364A CN 110541364 A CN110541364 A CN 110541364A CN 201910830540 A CN201910830540 A CN 201910830540A CN 110541364 A CN110541364 A CN 110541364A
- Authority
- CN
- China
- Prior art keywords
- cover beam
- prefabricated
- prefabricated cover
- bridge
- sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000009417 prefabrication Methods 0.000 title claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 238000010276 construction Methods 0.000 abstract description 25
- 238000009434 installation Methods 0.000 abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge construction, in particular to a method for prefabricating, assembling and fixing a bridge bent cap in sections, which is characterized by comprising the following steps of: and applying an external force balance moment opposite to the overturning direction of the prefabricated cover beam section on one side of the prefabricated cover beam section to keep the prefabricated cover beam section in a balanced state on the upright post. The invention has the advantages that: the effective construction which is simple, safe and quick and ensures the installation quality is achieved, the stress is clear, and the stability is good; the connecting structure between the cover beam and the bearing platform is simple, and the used tool is a necessary tool for implementing the bridge and does not need to be purchased additionally; the operation is relatively simple and convenient, and the field operation is convenient; according to the traditional construction process and method, the prefabricated bent cap sections and the upright posts are safely and stably fixed relative to each other; concrete pouring of the wet joint is facilitated; the construction cost, especially the time cost, is effectively reduced, the construction period is shortened, the construction progress is accelerated, and especially the requirement of safe construction is met.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a method for prefabricating, assembling and fixing a bridge bent cap in sections.
Background
The bridge assembly type construction is a mode which is widely applied at present. In particular urban bridge implementations. Because the width of the urban bridge is wide, the form of the double buttresses and the capping beam is common. Leading to the fact that the capping beam is wide. The longer capping beam has heavier weight and larger volume, and generally exceeds more than 250T. The requirement on equipment is high and the safety risk is high when the device is required to be installed by lifting once. Therefore, the installation is generally carried out in a segmented mode, and the risk is reduced. In the sectional installation, the humidifying joint concrete in the range of 2M in the middle section of the bent cap beam is cast in situ more from the design point of view, so that the connection at the hogging moment is avoided.
As the design is that the joint concrete is humidified and cast in situ within the range of 2M in the middle section of the bent cap, the fact that a prefabricated single-section bent cap is installed on a single upright post is inevitably generated in the implementation process of a construction site. In this form, the length of the cantilever at the two ends is different, and the change of the section form of the cover beam takes the upright column as a fulcrum, so that unbalance of the two ends is generated.
Therefore, the technical personnel in the field begin to explore a simple, convenient, safe, high-quality, rapid and economic construction method on the premise of ensuring the installation quality, and the problem to be solved by the technical personnel in construction is to realize safe and rapid construction without changing the existing construction process conditions.
Disclosure of Invention
The invention aims to provide a method for prefabricating, assembling and fixing a bridge bent cap in sections according to the defects of the prior art, and the method can balance on a single upright post by applying external force balance moment on the prefabricated bent cap sections so as to achieve the aim of subsequent construction.
The purpose of the invention is realized by the following technical scheme:
The bridge bent cap sectional prefabrication, assembly and fixation method comprises two prefabricated bent cap sections, wherein the prefabricated bent cap sections are respectively supported on a stand column below, and one side of each prefabricated bent cap section is a cantilever end, and is characterized in that: and applying an external force balance moment opposite to the overturning direction of the prefabricated cover beam section on one side of the prefabricated cover beam section to keep the prefabricated cover beam section in a balanced state on the upright post.
And when the external force balance moment is continuously applied, performing the operation of a concrete wet joint between the two sections of the prefabricated cover beam sections, wherein the concrete wet joint connects the two sections of the prefabricated cover beam sections into a whole.
The external force balance moment is applied by adding a steel strand at the side of the prefabricated cover beam section and tensioning the steel strand, and the prestress of the steel strand after tensioning is the external force balance moment.
And one end of the steel strand is connected and fixed with a bearing platform below the upright post, and the other end of the steel strand is connected and fixed with the prefabricated cover beam section after being tensioned.
The bearing platform is connected and fixed with the steel strand in a mode of embedding embedded parts used for being connected with the steel strand or directly embedding the steel strand during pouring.
And a preformed hole for the steel strand to penetrate is formed in the prefabricated cover beam section.
And a plurality of steel strands are arranged along the bridge direction of the prefabricated cover beam sections, and the steel strands are symmetrically tensioned from the middle to two sides by taking the middle beam as a first.
The number of the steel strands on the prefabricated cover beam segment is singular.
before the external force balance moment is applied, the prefabricated cover beam section is hoisted and positioned on the upright post through a lifting appliance.
The invention has the advantages that: the effective construction which is simple, safe and quick and ensures the installation quality is achieved, the stress is clear, and the stability is good; the connecting structure between the cover beam and the bearing platform is simple, and the used tool is a necessary tool for implementing the bridge and does not need to be purchased additionally; the operation is relatively simple and convenient, and the field operation is convenient; according to the traditional construction process and method, the prefabricated bent cap sections and the upright posts are safely and stably fixed relative to each other; concrete pouring of the wet joint is facilitated; the construction cost, especially the time cost, is effectively reduced, the construction period is shortened, the construction progress is accelerated, and especially the requirement of safe construction is met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
Fig. 3 is a side view of one side precast segment capping beam of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
As shown in fig. 1-3, the labels 1-7 are respectively shown as: the prefabricated capping beam comprises a prefabricated capping beam segment 1, a vertical column 2, a steel strand 3, a bearing platform 4, a foundation 5, a concrete wet joint 6 and a wet joint reinforcing steel bar 7.
Example (b): the method for prefabricating, assembling and fixing the bridge capping beam segments in the embodiment is used for realizing balance and corresponding positioning and fixing of the prefabricated capping beam segments on a single stand column (single column) so as to implement subsequent processes.
As shown in fig. 1, the bridge structure in this embodiment includes two prefabricated cover beam segments 1, and a certain distance is left between the two prefabricated cover beam segments 1 for construction of a concrete wet joint 6, so that the two prefabricated cover beam segments 1 are connected and fixed to form a whole, and the structural strength and stability of the cover beam body are ensured. Two upright posts 2 are respectively arranged below the two sections of prefabricated cover beam sections 1, and the two upright posts 2 respectively correspond to and independently support the two sections of prefabricated cover beam sections 1 one by one. At the bottom of the two columns 2, a bearing platform 4 is arranged, the bearing platform 4 is used for supporting the columns 2, and a foundation 5 for supporting the bearing platform 4 is arranged below the bearing platform 4.
the principle of the bridge bent cap sectional prefabrication, assembly and fixing method in the embodiment is as follows:
as shown in fig. 1, due to the different lengths of the cantilevers at the two ends of the prefabricated cover beam segment 1, the change of the cross section of the cover beam, taking the upright post 2 as the fulcrum, will inevitably generate the unbalance of the prefabricated cover beam segment 1. In other words, if the prefabricated capping beam segment 1 is freely installed on the column 2, it will overturn to one side, and as shown in fig. 1, the cantilever end of the prefabricated capping beam segment 1 will overturn. Based on this, the method in this embodiment applies an external force balance moment to the other side of the prefabricated cover beam segment 1 compared with the side where the prefabricated cover beam segment topples, that is, taking fig. 1 as an example, the external force balance moment is applied to the inner cantilever end of the prefabricated cover beam segment 1, so that the prefabricated cover beam segment 1 reaches a relative balance state with the upright post 2 as a fulcrum, and the application of the concrete wet joint 6 between the two prefabricated cover beam segments 1 is satisfied.
For the application of the external force balance moment, the present embodiment is realized by the steel strand 3, specifically:
As shown in fig. 1 to 3, vertical steel strands 3 are respectively arranged at the inner cantilever ends of two prefabricated cover beam segments 1, the bottom ends of the steel strands 3 are connected and fixed with a bearing platform 4, and the top ends of the steel strands are anchored on the surface layer of the prefabricated cover beam segments 1 after being tensioned. At this time, the steel strand 3 generates an external force balance moment in a downward direction after being tensioned and is applied to the inner cantilever end of the prefabricated cover beam segment 1, so that the moment and the moment of the outer cantilever end of the prefabricated cover beam segment 1 are balanced by taking the upright column 2 as a fulcrum, and the prefabricated cover beam segment 1 is kept in a relatively balanced state on the upright column 2.
The construction method comprises the following steps:
1) According to the design requirement, a concrete bearing platform 4 is poured, and a fixed end anchorage device of the steel strand 3 is pre-buried on the surface of the concrete bearing platform 4 or one end of the steel strand 3 is directly buried in the concrete bearing platform 4.
2) The prefabricated cover beam segment 1 is erected and installed by adopting a lifting appliance, and is lifted to the upper side of the upright post 2. When the prefabricated cover beam segment 1 is prefabricated, a preformed hole for the steel strand 3 to penetrate is formed.
3) Before the prefabricated cover beam section 1 is unhooked (before a lifting appliance is unhooked), the steel strand 3 penetrates through a preformed hole in the prefabricated cover beam section 1 and is tensioned, a tensioning end of the steel strand 3 is anchored on a surface layer of the prefabricated cover beam section 1 after tensioning is finished, and at the moment, prestress of the steel strand 3 is applied to the cantilever end at the side of the prefabricated cover beam section 1.
4) After the steel strand 3 finishes being constructed, the erected prefabricated cover beam segment 1 is unhooked, and the lifting appliance can be separated.
5) and (3) applying a concrete wet joint 6 between the two prefabricated cover beam sections 1 so as to connect the two prefabricated cover beam sections 1 into a whole.
in the whole wet joint construction process, the positions of the two sections of prefabricated cover beam sections 1 are fixed, no obstacle exists above the sections, the construction quality of the concrete wet joint 6 can be obviously improved, and the integrity and the stability of a beam body structure are guaranteed.
In the embodiment, in specific implementation: as shown in fig. 2, a plurality of steel strands 3 are respectively disposed at the cantilever ends at the inner sides of two sections of the prefabricated cover beam segments 1, and the steel strands 3 are uniformly spaced and are singular, so as to meet the requirement of the external force balance moment applied by the steel strands 3 and facilitate the advanced and rapid positioning of the middle beam. After the steel strand 3 in the middle is stretched in advance, the rest of the steel strands 3 are stretched from inside to outside in a symmetrical stretching mode.
The size, number, arrangement mode and other parameters of the steel strand 3 are determined by specific calculation, that is, the value of the external force balance moment required to be provided by the steel strand is calculated, and then the structure of the steel strand 3 is designed according to the value and the corresponding specification requirements are met.
In order to improve the integrity between the two sections of prefabricated cover beam sections 1, the adjacent side surfaces of the two sections of prefabricated cover beam sections 1 are respectively provided with wet joint reinforcing steel bars 7, the wet joint reinforcing steel bars 7 on the two sides are in butt joint, and the butt joint wet joint reinforcing steel bars 7 are embedded together along with the application of the concrete wet joint 6, so that the two sections of prefabricated cover beam sections 1 are tightly combined into a whole.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims.
Claims (9)
1. The bridge bent cap sectional prefabrication, assembly and fixation method comprises two prefabricated bent cap sections, the prefabricated bent cap sections are respectively supported on a stand column below, and cantilever ends are arranged on two sides of each prefabricated bent cap section, and the method is characterized in that: and applying an external force balance moment opposite to the overturning direction of the prefabricated cover beam section on one side of the prefabricated cover beam section to keep the prefabricated cover beam section in a balanced state on the upright post.
2. The bridge capping beam segmented prefabrication, assembly and fixation method according to claim 1, is characterized in that: and when the external force balance moment is continuously applied, performing the operation of a concrete wet joint between the two sections of the prefabricated cover beam sections, wherein the concrete wet joint connects the two sections of the prefabricated cover beam sections into a whole.
3. The bridge capping beam segmented prefabrication, assembly and fixation method according to claim 1, is characterized in that: the external force balance moment is applied by adding a steel strand at the side of the prefabricated cover beam section and tensioning the steel strand, and the prestress of the steel strand after tensioning is the external force balance moment.
4. The bridge capping beam segmented prefabrication, assembly and fixation method according to claim 3, characterized in that: and one end of the steel strand is connected and fixed with a bearing platform below the upright post, and the other end of the steel strand is connected and fixed with the prefabricated cover beam section after being tensioned.
5. The bridge capping beam segmented prefabrication, assembly and fixation method according to claim 4, is characterized in that: the bearing platform is connected and fixed with the steel strand in a mode of embedding embedded parts used for being connected with the steel strand or directly embedding the steel strand during pouring.
6. The bridge capping beam segmented prefabrication, assembly and fixation method according to claim 4, is characterized in that: and a preformed hole for the steel strand to penetrate is formed in the prefabricated cover beam section.
7. The bridge capping beam segmented prefabrication, assembly and fixation method according to claim 3, characterized in that: and a plurality of steel strands are arranged along the bridge direction of the prefabricated cover beam sections, and the steel strands are symmetrically tensioned from the middle to two sides by taking the middle beam as a first.
8. The bridge capping beam segmented prefabrication, assembly and fixation method according to claim 3, characterized in that: the number of the steel strands on the prefabricated cover beam segment is singular.
9. the bridge capping beam segmented prefabrication, assembly and fixation method according to claim 1, is characterized in that: before the external force balance moment is applied, the prefabricated cover beam section is hoisted and positioned on the upright post through a lifting appliance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830540.5A CN110541364A (en) | 2019-09-04 | 2019-09-04 | Bridge bent cap segmented prefabrication, assembly and fixation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830540.5A CN110541364A (en) | 2019-09-04 | 2019-09-04 | Bridge bent cap segmented prefabrication, assembly and fixation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110541364A true CN110541364A (en) | 2019-12-06 |
Family
ID=68711172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910830540.5A Pending CN110541364A (en) | 2019-09-04 | 2019-09-04 | Bridge bent cap segmented prefabrication, assembly and fixation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110541364A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042000A (en) * | 2020-01-16 | 2020-04-21 | 中建七局安装工程有限公司 | Temporary supporting method for continuous beam construction of support pier |
| CN111501527A (en) * | 2020-03-31 | 2020-08-07 | 上海城建市政工程（集团）有限公司 | Temporary fixing method for prestressed concrete bent cap with small column spacing and large cantilever |
| CN111794104A (en) * | 2020-06-30 | 2020-10-20 | 中铁二十二局集团第三工程有限公司 | Support-free assembly construction method for assembly type bent cap construction |
| CN115094778A (en) * | 2022-08-10 | 2022-09-23 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated T-shaped piers through bonded prestressed tendons and steel bars |
| CN116289482A (en) * | 2023-05-24 | 2023-06-23 | 湖南省交通规划勘察设计院有限公司 | Sectional prefabricated assembled bridge and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070020826A (en) * | 2005-08-17 | 2007-02-22 | 고려대학교 산학협력단 | A prestresed connection set bridge post using unit filled concrete with internally confined hollow and a method for construction |
| CN103215893A (en) * | 2013-04-26 | 2013-07-24 | 上海市城市建设设计研究总院 | Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam |
| CN203188113U (en) * | 2013-04-26 | 2013-09-11 | 上海市城市建设设计研究总院 | Segmental precasting assembly structure in large bent cap |
| CN106436583A (en) * | 2016-10-14 | 2017-02-22 | 中铁十局集团有限公司 | Large-cantilever bent cap tensioning anchorage temporary support device and construction method thereof |
| CN206109968U (en) * | 2016-10-25 | 2017-04-19 | 甘露 | Antidumping reinforced structure of curved bridge of single -column mound |
| CN207244429U (en) * | 2017-08-28 | 2018-04-17 | 中铁上海设计院集团有限公司 | A kind of precast assembly structure of great cantilever bent cap formula bridge pier |
-
2019
- 2019-09-04 CN CN201910830540.5A patent/CN110541364A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070020826A (en) * | 2005-08-17 | 2007-02-22 | 고려대학교 산학협력단 | A prestresed connection set bridge post using unit filled concrete with internally confined hollow and a method for construction |
| CN103215893A (en) * | 2013-04-26 | 2013-07-24 | 上海市城市建设设计研究总院 | Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam |
| CN203188113U (en) * | 2013-04-26 | 2013-09-11 | 上海市城市建设设计研究总院 | Segmental precasting assembly structure in large bent cap |
| CN106436583A (en) * | 2016-10-14 | 2017-02-22 | 中铁十局集团有限公司 | Large-cantilever bent cap tensioning anchorage temporary support device and construction method thereof |
| CN206109968U (en) * | 2016-10-25 | 2017-04-19 | 甘露 | Antidumping reinforced structure of curved bridge of single -column mound |
| CN207244429U (en) * | 2017-08-28 | 2018-04-17 | 中铁上海设计院集团有限公司 | A kind of precast assembly structure of great cantilever bent cap formula bridge pier |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042000A (en) * | 2020-01-16 | 2020-04-21 | 中建七局安装工程有限公司 | Temporary supporting method for continuous beam construction of support pier |
| CN111501527A (en) * | 2020-03-31 | 2020-08-07 | 上海城建市政工程（集团）有限公司 | Temporary fixing method for prestressed concrete bent cap with small column spacing and large cantilever |
| CN111794104A (en) * | 2020-06-30 | 2020-10-20 | 中铁二十二局集团第三工程有限公司 | Support-free assembly construction method for assembly type bent cap construction |
| CN115094778A (en) * | 2022-08-10 | 2022-09-23 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated T-shaped piers through bonded prestressed tendons and steel bars |
| CN116289482A (en) * | 2023-05-24 | 2023-06-23 | 湖南省交通规划勘察设计院有限公司 | Sectional prefabricated assembled bridge and construction method thereof |
| CN116289482B (en) * | 2023-05-24 | 2023-09-05 | 湖南省交通规划勘察设计院有限公司 | Sectional prefabricated assembled bridge and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110541364A (en) | Bridge bent cap segmented prefabrication, assembly and fixation method | |
| AU2015409344B2 (en) | Assembled type pier column member with steel-concrete composite structure | |
| EP2479430B1 (en) | Method for assembling shell segments for forming tower sections of a hybrid wind turbine tower | |
| US20110278752A1 (en) | Method for constructing precast coping for bridge | |
| CN109914234B (en) | Precast segment shear-resistant spliced concrete pier connected through bolts | |
| CN110205938B (en) | Steel pipe arch installation method of through beam-arch combination bridge | |
| KR100565865B1 (en) | Construction method of concrete arch bridge | |
| CN102277836B (en) | Construction method of tilting concrete tower base | |
| CN110318342B (en) | Construction equipment is assembled to prefabricated bent cap cantilever of festival section | |
| CN110685222A (en) | Balance construction method for prefabricated bent cap support-free pull rod | |
| JP6028984B2 (en) | How to replace the pier | |
| CN207812181U (en) | Track, track girder and its crane beam | |
| CN106894345A (en) | Continuous beam end bay closing device and method | |
| CN103967129B (en) | The coupled column assembled beam frame of built-in pipe high-strength concrete stem stem and constructional method thereof | |
| CN110878522B (en) | Main tower lower cross beam construction system and construction method | |
| CN205669259U (en) | Post-tensioned prestressing precast frame | |
| CN211142787U (en) | Bridge bent cap segmentation is prefabricated assembles fixed knot and constructs | |
| CN211815595U (en) | Lower tower column tension and compression structure for cable tower | |
| CN213682477U (en) | Upper cover structure system applied to track operation line | |
| CN105971287B (en) | Counter force wall vertical prestressing construction method | |
| CN107700843B (en) | Construction method of large-span building roof structure | |
| JP3470246B2 (en) | Method of reinforcing steel pedestal and reinforced pedestal | |
| CN107142830A (en) | Steel pipe web prestressing force steel reinforced concrete combines main beam structure and construction method | |
| CN112095780A (en) | Upper cover structure system applied to track operation line and implementation method thereof | |
| CN108677750B (en) | Assembled railroad bridge rotation construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191206 |
|
| RJ01 | Rejection of invention patent application after publication |