CN109883843A - A kind of experimental rig and the method that precast assembly bridge pier is tested using the device - Google Patents
A kind of experimental rig and the method that precast assembly bridge pier is tested using the device Download PDFInfo
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- CN109883843A CN109883843A CN201910258235.3A CN201910258235A CN109883843A CN 109883843 A CN109883843 A CN 109883843A CN 201910258235 A CN201910258235 A CN 201910258235A CN 109883843 A CN109883843 A CN 109883843A
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- precast assembly
- jack
- steel strand
- pier stud
- bridge pier
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 230000000712 assembly Effects 0.000 claims abstract description 3
- 238000000429 assembly Methods 0.000 claims abstract description 3
- 238000010276 construction Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 3
- 230000009429 distress Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000010998 test method Methods 0.000 abstract description 3
- 230000035882 stress Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 208000037805 labour Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Abstract
The invention discloses a kind of experimental rigs, the pressure-bearing jack including being separately mounted to each precast assembly pier stud top, are placed with capital identical with cushion cap length floor stringer in the pressure-bearing jack top horizontal；It is respectively arranged on the top cylinder of adjacent two precast assemblies pier stud to jack is drawn, is connected with steel strand between described pair of drawing jack；Vertical steel strand wires are connected separately at the both ends of the cushion cap and capital floor stringer.The invention also discloses the methods tested using above-mentioned experimental rig precast assembly bridge pier.The advantage of the invention is that experimental rig structure is simple, test method is convenient, and test result is clear, has filled up the blank of existing precast assembly bridge pier overall performance especially interconnecting piece quality test.The present apparatus can have enough to meet the need reuse simultaneously, and experimentation cost is low.
Description
Technical field
The present invention relates to highways and municipal bridge technology, more particularly, to a kind of experimental rig of precast assembly bridge pier, originally
Invention further relates to the method tested using the experimental rig precast assembly bridge pier.
Background technique
With the fast development of highway and municipal science of bridge building, a kind of construction of the precast assembly bridge pier as bridge pier,
The construction efficiency of bridge pier can be greatly promoted, the maximized influence for reducing substructure construction to traffic, so more and more
Engineering in be applied.
Since precast assembly bridge pier is that bridge pier is resolved into one or several light components in factory according to design requirement
Concentration pre-casting, then it is transported to scene with transport vehicle, the assembling construction carried out using hoisting machine tool, therefore this method has factory normalization
Construction degree is high, construction speed is fast, can reduce scene pollution, small to Coherent traffic noise and the features such as can save a large amount of labours.
As shown in Figure 1, three precast assembly pier studs 101 can be prefabricated in advance in factory, after being transported to scene, it be installed to be connected to respectively and is held
On platform 103, and it is linked together with pile foundation 102.
The core of precast assembly bridge pier is the connecting structure between bridge pier and cushion cap, bridge pier and bridge pier, bridge pier and bent cap.
Current more common connecting structure mode has: (1) bayonet joint；(2) presstressed reinforcing steel connects；(3) grout sleeve connects；
(4) grouting metal bellows connection etc..
Though precast assembly bridge pier advantages, connecting portion is often positioned in the maximum position of stress, therefore precast assembly
The key of bridge pier is that concrete and the secondary of reinforcing bar are reliably connected.At present for the bridge pier performance of secondary connection construction without maturation
Experimental rig is only capable of being referred to the experimental rig of cast-in-place bridge pier, due to cast-in-place the bridge pier only performance of experimental material, bridge pier
The verticality of appearance and bridge pier can not detect the overall performance of precast assembly bridge pier, insufficient for the evaluation depth of link position.
Pier stud is by the effect from additional horizontal forces such as temperature change, concrete shrinkage and automobile braking forces, pier bottom position
Bending moment is maximum, therefore is easiest to crack occur.Data shows that it is attached that cast-in-place bridge pier crack appearance position has focused largely on pier bottom
Closely.The shape in cast-in-place bridge pier crack shows as ring shake, and fracture length is less than half of perimeter of pier stud, in symmetrical pier stud itself
The heart, fracture width is bigger more outward, and it is also higher that severity occurs further away from the pier stud crack at bridge center.To precast assembly pier
Column, FRACTURE CHARACTERISTICS is not only related with mechanical characteristic, but also closely related with the connection reliability of each component, therefore is further right
Precast assembly bridge pier carries out experimental study, needs to design a kind of experimental rig of special precast assembly bridge pier and uses the device
The method that precast assembly bridge pier is tested.
Summary of the invention
The purpose of the present invention is to provide a kind of experimental rigs of precast assembly bridge pier, and the experimental rig structure is simple, examination
It is clear to test result, accurate evaluation can be made to the overall performance of bridge pier；Present invention simultaneously provides using the device to precast assembly
The method that bridge pier is tested.
To achieve the above object, the present invention can take following technical proposals:
Experimental rig of the present invention, the pressure-bearing jack including being separately mounted to each precast assembly pier stud top, described
Pressure-bearing jack top horizontal is placed with capital identical with cushion cap length floor stringer；The upper post of adjacent two precast assemblies pier stud
It is respectively arranged on body to jack is drawn, is connected with steel strand between described pair of drawing jack；In the cushion cap and column
The both ends of top floor stringer are connected separately with vertical steel strand wires.
Shape steel bracket is set on the top cylinder of the precast assembly pier stud, described pair of drawing jack is installed in the type
On steel bracket.
The both ends of the cushion cap are respectively installed with anchor ear, and the lower end of the vertical steel strand wires is connected on the anchor ear.
Include following specific steps using the method that above-mentioned experimental rig tests precast assembly bridge pier:
The first step, it is first in precasting yard that the precast assembly pier stud comprising connecting elements is pre-formed；
Second step, construction site setting-out lift precast assembly pier stud in place, assembled on cushion cap；Prefabricated capital floor stringer；
Third step installs shape steel bracket, steel strand on precast assembly pier stud；Pressure-bearing is installed at the top of precast assembly pier stud
Jack and capital floor stringer；
4th step installs anchor ear at cushion cap both ends, draws between anchor ear and capital floor stringer and set vertical steel strand wires, vertical steel strand wires
Apply the axial force of design to bridge pier together with pressure-bearing jack；
5th step, installation reaches the horizontal force of design to jack, and tensioning steel strand is drawn on shape steel bracket；
6th step then will be practical using distress in concrete defect comprehensive tester measurement pier stud crack form, size and depth
The theoretical values of measurement numerical value and fracture width carry out analysis comparison, obtain the overall performance conclusion of the precast assembly bridge pier.
The advantage of the invention is that experimental rig structure is simple, test method is convenient, and test result is clear, has filled up existing
The blank of precast assembly bridge pier overall performance especially interconnecting piece quality test.The present apparatus can have enough to meet the need reuse simultaneously, test
It is at low cost.
Detailed description of the invention
Fig. 1 is the structure chart of precast assembly bridge pier.
Fig. 2 is structural schematic diagram of the invention.
Fig. 3 is the front view of Fig. 2.
Fig. 4 is the lateral view of Fig. 2.
The stress sketch of assembly bridge pier when Fig. 5 is present invention test.
The stress model figure of assembly bridge pier when Fig. 6 is present invention test.
Specific embodiment
Detailed Jie is done to structure of the invention and test method by taking three column precast assembly bridge piers (as shown in Figure 1) as an example below
It continues, in order to the understanding of those skilled in the art.
The experimental rig of precast assembly bridge pier of the present invention is as in Figure 2-4, including be separately mounted to three it is prefabricated
The pressure-bearing jack 1 on assembled 101 top of pier stud is placed with one and 103 length of cushion cap in three 1 top horizontals of pressure-bearing jack
Identical capital floor stringer 2；It is respectively arranged on the top cylinder of two adjacent precast assembly pier studs 102 to drawing jack 3,
Steel strand 4 is connected between drawing jack 3 at two；It is connected separately at the both ends of cushion cap 103 and capital floor stringer 2
Vertical steel strand wires 5.
For convenience of installation and removal, it is set with shape steel bracket 6 on the top cylinder of precast assembly pier stud 101, it is very heavy to drawing
Top 3 is installed on shape steel bracket 6.Likewise, being respectively installed with anchor ear 7, the lower end of vertical steel strand wires 5 at the both ends of cushion cap 103
It is connected on anchor ear 7.
Include following specific steps using the method that experimental rig of the present invention tests precast assembly bridge pier:
The first step, it is first in precasting yard that the precast assembly pier stud 101 comprising connecting elements is pre-formed；
Second step, construction site setting-out will be in place, assembled in the lifting to cushion cap 103 of precast assembly pier stud 101；Prefabricated capital is auxiliary
Help beam 2 stand-by；
Third step installs shape steel bracket 6, steel strand 4 on precast assembly pier stud 101；At 101 top of precast assembly pier stud
Pressure-bearing jack 1 and capital floor stringer 2 are installed；
4th step installs anchor ear 7 at 103 both ends of cushion cap, draws between anchor ear 7 and capital floor stringer 2 and set vertical steel strand wires 5, erect
Applying the axial force of design to bridge pier together to steel strand wires 5 and pressure-bearing jack 1, the axial force that vertical steel strand wires 5 apply is N1,
The axial force that pressure-bearing jack 1 applies is N；
5th step, installation reaches the level of design to jack 3, and tensioning steel strand 4 is drawn on shape steel bracket 6
Power F；The stress sketch of the assembly bridge pier and stress model figure are as shown in Figure 5, Figure 6 at this time；
6th step measures the crack form of pier stud, size and depth at this time using distress in concrete defect comprehensive tester, then
The theoretical values of actual measurement numerical value and calculated fracture width are subjected to analysis comparison, you can get it the precast assembly bridge pier
Overall performance conclusion.
Claims (4)
1. a kind of experimental rig, it is characterised in that: the pressure-bearing jack including being separately mounted to each precast assembly pier stud top,
The pressure-bearing jack top horizontal is placed with capital identical with cushion cap length floor stringer；Adjacent two precast assemblies pier stud it is upper
It is respectively arranged on portion's cylinder to jack is drawn, is connected with steel strand between described pair of drawing jack；In the cushion cap
Vertical steel strand wires are connected separately with the both ends of capital floor stringer.
2. experimental rig according to claim 1, it is characterised in that: be set on the top cylinder of the precast assembly pier stud
There is shape steel bracket, described pair of drawing jack is installed on the shape steel bracket.
3. experimental rig according to claim 1, it is characterised in that: the both ends of the cushion cap are respectively installed with anchor ear, institute
The lower end for stating vertical steel strand wires is connected on the anchor ear.
4. the method tested using any experimental rig in claim 1-3 precast assembly bridge pier, it is characterised in that: packet
Include following specific steps:
The first step, it is first in precasting yard that the precast assembly pier stud comprising connecting elements is pre-formed；
Second step, construction site setting-out lift precast assembly pier stud in place, assembled on cushion cap；Prefabricated capital floor stringer；
Third step installs shape steel bracket, steel strand on precast assembly pier stud；Pressure-bearing is installed at the top of precast assembly pier stud
Jack and capital floor stringer；
4th step installs anchor ear at cushion cap both ends, draws between anchor ear and capital floor stringer and set vertical steel strand wires, vertical steel strand wires
Apply the axial force of design to bridge pier together with pressure-bearing jack；
5th step, installation reaches the horizontal force of design to jack, and tensioning steel strand is drawn on shape steel bracket；
6th step then will be practical using distress in concrete defect comprehensive tester measurement pier stud crack form, size and depth
The theoretical values of measurement numerical value and fracture width carry out analysis comparison, obtain the overall performance conclusion of the precast assembly bridge pier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910258235.3A CN109883843A (en) | 2019-04-01 | 2019-04-01 | A kind of experimental rig and the method that precast assembly bridge pier is tested using the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910258235.3A CN109883843A (en) | 2019-04-01 | 2019-04-01 | A kind of experimental rig and the method that precast assembly bridge pier is tested using the device |
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| Publication Number | Publication Date |
|---|---|
| CN109883843A true CN109883843A (en) | 2019-06-14 |
Family
ID=66935559
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910258235.3A Pending CN109883843A (en) | 2019-04-01 | 2019-04-01 | A kind of experimental rig and the method that precast assembly bridge pier is tested using the device |
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| CN (1) | CN109883843A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005171732A (en) * | 2003-12-15 | 2005-06-30 | Railway Technical Res Inst | Loading test device and its method |
| CN101845794A (en) * | 2010-03-24 | 2010-09-29 | 中冶实久建设有限公司 | Prestress prepressing method of number 0 block construction support for rigid frame bridge and stayed-cable bridge |
| CN103257080A (en) * | 2013-05-23 | 2013-08-21 | 西南交通大学 | Prototype test device for shield tunnel dual-layer lining structure and secondary lining pouring device |
| CN105369740A (en) * | 2015-12-10 | 2016-03-02 | 中铁第五勘察设计院集团有限公司 | Pier horizontal force resisting method |
| CN105780658A (en) * | 2016-03-11 | 2016-07-20 | 中国建筑第六工程局有限公司 | Transverse opposite pulling method for space cable plane structure cable system |
| CN206146751U (en) * | 2016-10-21 | 2017-05-03 | 山西省交通科学研究院 | A loading device for monospar static test |
| CN108844825A (en) * | 2018-07-09 | 2018-11-20 | 华侨大学 | Band for Compressive Performance test is to drawing reinforcing bar steel core concrete column and test method |
| CN208537304U (en) * | 2018-07-03 | 2019-02-22 | 扬州工业职业技术学院 | A kind of experiment loading unit of force column |
| CN209690067U (en) * | 2019-04-01 | 2019-11-26 | 河南省交通规划设计研究院股份有限公司 | A kind of experimental rig of precast assembly bridge pier |
-
2019
- 2019-04-01 CN CN201910258235.3A patent/CN109883843A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005171732A (en) * | 2003-12-15 | 2005-06-30 | Railway Technical Res Inst | Loading test device and its method |
| CN101845794A (en) * | 2010-03-24 | 2010-09-29 | 中冶实久建设有限公司 | Prestress prepressing method of number 0 block construction support for rigid frame bridge and stayed-cable bridge |
| CN103257080A (en) * | 2013-05-23 | 2013-08-21 | 西南交通大学 | Prototype test device for shield tunnel dual-layer lining structure and secondary lining pouring device |
| CN105369740A (en) * | 2015-12-10 | 2016-03-02 | 中铁第五勘察设计院集团有限公司 | Pier horizontal force resisting method |
| CN105780658A (en) * | 2016-03-11 | 2016-07-20 | 中国建筑第六工程局有限公司 | Transverse opposite pulling method for space cable plane structure cable system |
| CN206146751U (en) * | 2016-10-21 | 2017-05-03 | 山西省交通科学研究院 | A loading device for monospar static test |
| CN208537304U (en) * | 2018-07-03 | 2019-02-22 | 扬州工业职业技术学院 | A kind of experiment loading unit of force column |
| CN108844825A (en) * | 2018-07-09 | 2018-11-20 | 华侨大学 | Band for Compressive Performance test is to drawing reinforcing bar steel core concrete column and test method |
| CN209690067U (en) * | 2019-04-01 | 2019-11-26 | 河南省交通规划设计研究院股份有限公司 | A kind of experimental rig of precast assembly bridge pier |
Non-Patent Citations (1)
| Title |
|---|
| 魏红一 等: "采用套筒连接的预制桥墩抗震性能试验研究", 《同济大学学报(自然科学版)》, vol. 44, no. 07, 31 July 2016 (2016-07-31), pages 1010 - 1016 * |
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