CN106400694A - Fabricated prestressing device and method for high pier scaffoldings - Google Patents
Fabricated prestressing device and method for high pier scaffoldings Download PDFInfo
- Publication number
- CN106400694A CN106400694A CN201610999433.1A CN201610999433A CN106400694A CN 106400694 A CN106400694 A CN 106400694A CN 201610999433 A CN201610999433 A CN 201610999433A CN 106400694 A CN106400694 A CN 106400694A
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- distribution beam
- high pier
- prepressing device
- support assembled
- steel plate
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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
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a fabricated prestressing device and method for high pier scaffoldings. The fabricated prestressing device includes piers on which the scaffoldings are positioned, and a spatial truss. The spatial truss is hinged to the top of the piers. The base of the spatial truss is fixedly connected to a first stress distribution allocation girder group for prestressing. The upper end of the scaffoldings is provided with the second allocation girder group for prestressing. A hydraulic jack is arranged between the first and the second allocation girder group for prestressing. The fabricated prestressing device has a simple structure and is easily assembled and disassembled. Not only can the device actualize the prestressing test for piers and scaffoldings quickly and effectively but the device can also remove the inelastic deformation of scaffoldings in the process of prestressing. The device can obtain an accurate deformation value of every pier and scaffolding under the corresponding load effect.
Description
Technical field
The present invention relates to a kind of high pier pre-pressing bracket device, belong to Bridge Construction technical field, specifically a kind of applicable
In high pier pre-pressing bracket be easy to pacify the device torn open.
Background technology
Precompressed is an important process in high-pier and long-span bridge construction.On the one hand it is the degree of safety for detecting support, disappear
Inelastic deformation except support.On the other hand it is to observe the deformation that this basis and support produce in the presence of corresponding load
Value, can calculate elastic deformation value, and the mould absolute altitude for unloading after-poppet provides data to support.
Conventional stent preloading method is divided into preloading and anti-fulcrum preloading method.
Piling prepressing is to carry out being classified piling prepressing using the heap loading such as sand pocket, concrete block, water tank, steel, there is heap
Loading capacity is too big, needs to prepare a large amount of heap loadings in advance, preloading is time-consuming, the shortcomings of safety is poor.Meanwhile, generally
Using piling prepressing simulating load effect poor, more tired for the uneven pre- press operation of structural simulation load of load assignment
Difficult.
Anti- fulcrum preloading method, that is, the side of counter-force precompressed is applied to support using tension steel strand or finish rolling deformed bar
Method, such as discloses a kind of high pier, in large-tonnage works rack construction in Chinese invention patent description CN101139819A
Steel strand reversal fulcrum preloading method, it comprises the following steps：Selected steel strand wires：Steel strand wires precompressed gross weight presses works concrete
By code requirement, deadweight simultaneously considers that certain load factor carries out budget, determine required steel strand wires type, quantity and each
The required tensioning force value applying of steel strand wires；Lay and anchoring steel strand wires；Setting steel strand tension end auxiliary facility；Carry out in order
Precompressed；Observation settling amount and determination camber：Statistical analysiss are carried out to the data of observation, determines elasticity and inelastic deformation
Amount, in conjunction with the amount of deflection calculating in inspection calculation data, camber is determined in analysis.Although it can the high pier of effectively solving, large-tonnage structure
Precompressed problem in thing rack construction project, but descend thereon anchor point connect distant, connect, anchoring etc. link more,
Complex operation, anchor point change are difficult, totally relatively costly, and have the deficiencies such as certain potential safety hazard.
Content of the invention
The defect existing for above-mentioned prior art, present invention aim to solving the deficiency of above-mentioned background technology,
There is provided a kind of high pier support assembled prepressing device, it is not only simple in structure, and can conveniently and efficiently realize pier footing
Detection with deformation values under corresponding load action for the support.
For solving above-mentioned technical problem, present invention employs such a high pier support assembled prepressing device, it includes
Bridge pier, described bridge pier is provided with support；Also include space truss；Described space truss is articulated with described bridge pier top；Described
Space truss bottom is connected with the first stress distribution beam group；Described pedestal upper end is provided with the second stress distribution beam group；Described
It is provided with hydraulic jack between one stress distribution beam group and described second stress distribution beam group.
In a kind of preferred embodiment of the present invention, the bottom of described space truss is provided with presetting with pin hole
Steel plate；The top of described bridge pier is embedded with the built-in fitting for connecting described default steel plate.
In a kind of preferred embodiment of the present invention, described built-in fitting is π shape；Described built-in fitting includes reinforcing bar, steel plate
With the reserved otic placode with pin hole；Described reinforcing bar is vertically fixed in described steel plate lower end；Described reserved otic placode is vertically fixed in
Described steel plate upper end.
In a kind of preferred embodiment of the present invention, between described steel plate and described reserved otic placode, it is welded with multiple putting more energy into
Rib.
In a kind of preferred embodiment of the present invention, described space truss includes the main couple that two panels is arranged in parallel；Institute
State main couple to be fixedly connected with each other by connecting rod.
In a kind of preferred embodiment of the present invention, the cylinder ends of described hydraulic jack are removably with described
Two stress distribution beam groups connect；The installation site that described hydraulic jack withstands in described second stress distribution beam group is adjustable；Described
The tailpiece of the piston rod of hydraulic jack supports described first stress distribution beam group
In a kind of preferred embodiment of the present invention, described main couple is isosceles trapezoid.
In a kind of preferred embodiment of the present invention, described main couple includes top boom, lower boom, diagonal web member and perpendicular abdomen
Bar；Described top boom is vertically arranged in parallel above described lower boom；The described pole length that winds up is less than described lower boom
Length；It is connected with multiple described diagonal web members and described perpendicular web member between described top boom and described lower boom.
In a kind of preferred embodiment of the present invention, described first stress distribution beam group includes transverse distribution beam and upper
Longitudinal distribution beam；Described upper transverse distribution beam is fixed in the bottom of the lower boom of described space truss；Described longitudinal distribution beam
It is fixed in the bottom of described upper transverse distribution beam.
In a kind of preferred embodiment of the present invention, described second stress distribution beam group include lower transverse distribution beam and under
Longitudinal distribution beam；Described lower transverse distribution beam is fixed in described pedestal upper end；Described lower longitudinal distribution beam is fixed in described lower horizontal stroke
To distribution beam upper end.
In a kind of preferred embodiment of the present invention, described space truss is provided with default hanger.
The invention also discloses a kind of high pier support assembled preloading method, it installs right such as on treating pre-compression stand will
Seek a kind of high pier support assembled prepressing device described in 1 and described high pier support assembled prepressing device is connected with bridge pier；
By adjusting, hydraulic jack is progressively symmetrical to support to be applied to complete while downward prefabricating load bridge pier is applied upwards
Prestretching load；Observation draws the deformation values that bridge pier is produced in the presence of corresponding load to support, and is analyzed according to this deformation values
Calculate elastic deformation value.
The invention has the beneficial effects as follows：Present configuration is simple, assembling and disassembling is convenient, can not only efficiently and rapidly realize
To each bridge pier and its support precompressed test, simultaneously and can effectively eliminate the non-resilient change in precompressed for the support
Shape, draws each bridge pier and support deformation values under respective loads effect exactly；The present invention passes through the setting of π shape built-in fitting,
Facilitate installation and the use of space truss, effectively increase work efficiency and the versatility of the present invention；Should by arranging first
Power distribution beam group and the second stress distribution beam group make load distribution more uniform, each bridge pier therefore drawing and its support
Deformation Value Data is more accurate；By the design of trapezoidal solids truss, it is effectively improved rigidity and the safety of the present invention.
Brief description
Fig. 1 is a kind of structural representation of high pier support assembled prepressing device of the embodiment of the present invention；
Fig. 2 is a kind of structural side view of high pier support assembled prepressing device of the embodiment of the present invention；
Fig. 3 is a kind of high pier pre-pressing bracket structural plan of high pier support assembled prepressing device of the embodiment of the present invention；
Fig. 4 is that a kind of pier top built-in fitting of high pier support assembled prepressing device of the embodiment of the present invention is preset with space truss
Steel plate connects drawing；
In figure：1- top boom, 2- lower boom, 3- diagonal web member, 4- erects web member, and 5- presets steel plate, and 6- presets hanger, and 7- connects
Bar, 8- bridge pier, 9- built-in fitting, 9.1- reinforcing bar, 9.2- ribbed stiffener, 9.3- steel plate, 9.4- reserves otic placode, 10- upper transverse distribution beam,
11- upper longitudinal direction distribution beam, transverse distribution beam under 12-, longitudinal distribution beam, 14- hydraulic jack, 15- bearing pin under 13-.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, not
For limiting the present invention.
From the structural representation of a kind of high pier support assembled prepressing device shown in Fig. 1 to Fig. 4, the present invention includes
Bridge pier 8, bridge pier 8 is provided with support；Also include space truss；Space truss is articulated with described bridge pier 8 top；Space truss bottom
End is connected with the first stress distribution beam group；Pedestal upper end is provided with the second stress distribution beam group；First stress distribution beam group and the
It is provided with hydraulic jack 14 between two stress distribution beam groups；The bottom of space truss is provided with the default steel plate with pin hole
5；The top of bridge pier 8 is embedded with the built-in fitting 9 for connecting default steel plate 5；Built-in fitting 9 is π shape；Built-in fitting 9 includes reinforcing bar
9.1st, steel plate 9.3 and the reserved otic placode 9.4 with pin hole；Reinforcing bar 9.1 is vertically fixed in steel plate 9.3 lower end；Reserved otic placode 9.4
Vertically it is fixed in steel plate 9.3 upper end；It is welded with multiple ribbed stiffeners 9.2 between steel plate 9.3 and reserved otic placode 9.4；Space truss bag
Include the main couple that two panels is arranged in parallel；Main couple is fixedly connected with each other by connecting rod 7；Main couple is isosceles trapezoid；Main couple includes
Top boom 1, lower boom 2, diagonal web member 3 and perpendicular web member 4；Top boom 1 is vertically arranged in parallel above lower boom 2；Wind up
Bar 1 length is less than lower boom 2 length；It is connected with multiple diagonal web members 3 and perpendicular web member 4 between top boom 1 and lower boom 2；First should
Power distribution beam group includes transverse distribution beam 10 and upper longitudinal distribution beam 11；Upper transverse distribution beam 10 is fixed under space truss
The bottom of chord member 2；Upper longitudinal distribution beam 11 is fixed in the bottom of transverse distribution beam 10；Second stress distribution beam group includes lower horizontal stroke
To distribution beam 12 and lower longitudinal distribution beam 13；Lower transverse distribution beam 12 is fixed in pedestal upper end；Lower longitudinal distribution beam 13 is fixed in
Lower transverse distribution beam 12 upper end；Default hanger 6 is provided with space truss.
During using the present invention, first, shift to an earlier date prefabricated space truss structure in back court.This space truss is parallel to each other by two panels
, the main couple that shape is trapezoidal assembly formed, complete in back court processing and fabricating.Wherein parallel chord truss is by top boom 1, lower edge
Bar 2, diagonal web member 3, perpendicular web member 4 and coupling bar 7 form, and chord member is all made using angle steel with web member, wherein top boom 1 and
Lower boom 2 is parallel, and lower boom 2 is longer than top boom 1, and middle part is provided with some perpendicular web members 4, from middle part to both sides using by diagonal web member 3
With the lattice piece (triangular element) of perpendicular web member 4 composition, eventually form and stable by what straight-bar formed, there is triangular element
Truss structural.Between two panels parallel chord truss, the coupling bar 7 using triangular element arrangement form is attached.
Space truss lower boom 2 bottom is welded with a number of I-steel by certain horizontal spacing, to be subject to as truss precompressed
The upper transverse distribution beam 10 of power, meanwhile, has downward opening channel-section steel to divide as upper longitudinal direction in upper transverse distribution beam 10 bottom welding
Join beam 11, during precompressed, hydraulic jack 14 directly acts on longitudinal distribution beam 11 can be along upper longitudinal distribution beam 11 longitudinal length
Direction adjusts hydraulic jack 14 active position within the specific limits, that is, the cylinder ends of hydraulic jack 14 removably with
Longitudinal distribution beam 13 connects；Installation site in lower longitudinal distribution beam 13 for the hydraulic jack 14 is adjustable；Hydraulic jack 14
Tailpiece of the piston rod supports upper longitudinal direction distribution beam 11, depending on upper longitudinal distribution beam 11 length presses practical situation, wherein hydraulic jack 14
Include bolt with the connected mode of lower longitudinal distribution beam 13 to fix or fixing using other fitments, as long as can be real
Existing hydraulic jack 14 is detachably connected to lower longitudinal distribution beam 13.
Space truss central bottom has four blocks of default steel plates 5 having pin hole, for pre-embedded steel slab 9 on bridge pier 8 even
Connect.Top boom 1 is welded with four pieces of default otic placodes 6 with holes, thus the lifting during being conveniently used in turn.
In the pre-buried some built-in fittings 9 in pier stud top during Bridge Pier Construction.Built-in fitting 9 is in " π " shape, by steel plate 9.3 and reinforcing bar 9.1
Perforation plug welding is welded, and passes through bilateral fillet weld seam with reserved otic placode 9.4, and vertical placement is embedded in structural column afterwards
Interior, bond stress is formed by casting concrete.Pin hole is had, reserved otic placode 9.4 passes through latch and solid on reserved otic placode 9.4
Default steel plate 5 on truss is articulated and connected.For ensureing structural strength, strengthen the connection of steel plate 9.3 and reserved otic placode 9.4,
Between weld some ribbed stiffeners 9.2.
Before pre-pressing bracket, in order to more advantageously simulate the load assignment of actual concrete, load is effectively allocated to down
On portion's support, transverse distribution beam 12, lower longitudinal distribution beam 13 under frame upper template is pressed and sequentially successively arranged up and down, distribution beam
Quantity, spacing and position should be distributed consistent, the true simulating load of energy with concrete actual loading.
Afterwards hydraulic jack is placed in longitudinal distribution beam, and as suspension centre, space truss is lifted using default hanger 6
To bridge pier 8 top, then by bearing pin 15, steel plate 5 default on truss is attached with pier top built-in fitting 9.
After space truss installation is ready, by adjusting hydraulic jack 14 oil pressure progressively applying precompressed lotus symmetrical to support
Carry, until meeting pre- pressure request.After the completion of precompressed, space truss is dismantled, and lift to next precompressed position, repeat
Above step is until complete all precompressed work.
Using the method that the device of invention carries out precompressed to bridge pier and its support it is：The present invention is installed on treating pre-compression stand
In high pier support assembled prepressing device and described high pier support assembled prepressing device is connected with bridge pier 8；By adjusting
Progressively the prestretching that apply downward prefabricating load while complete bridge pier 8 is applied upwards symmetrical to support carries hydraulic jack 14
Lotus；Observation draws the deformation values that bridge pier 8 is produced in the presence of corresponding load to support, and is obtained according to this deformation values analytical calculation
Go out elastic deformation value, in conjunction with the amount of deflection of the calculating in inspection calculation data, analysis draws camber, for unloading the mould absolute altitude of after-poppet
Data is provided to support.
It should be appreciated that the above, the only specific embodiment of the present invention, but protection scope of the present invention is not
Be confined to this, any those of ordinary skill in the art disclosed herein technical scope in, the change that can readily occur in
Or replace, all should be included within the scope of the present invention.
Claims (10)
1. a kind of high pier support assembled prepressing device, including bridge pier (8), described bridge pier (8) is provided with support；Its feature exists
In：Also include space truss；Described space truss is articulated with described bridge pier (8) top；Described space truss bottom is connected with
One stress distribution beam group；Described pedestal upper end is provided with the second stress distribution beam group；Described first stress distribution beam group with described
It is provided with hydraulic jack (14) between second stress distribution beam group.
2. a kind of high pier support assembled prepressing device according to claim 1 it is characterised in that：Described space truss
Bottom is provided with the default steel plate (5) with pin hole；The top of described bridge pier (8) is embedded with for connecting described default steel plate
(5) built-in fitting (9).
3. a kind of high pier support assembled prepressing device according to claim 2 it is characterised in that：Described built-in fitting (9)
For π shape；Described built-in fitting (9) includes reinforcing bar (9.1), steel plate (9.3) and the reserved otic placode (9.4) with pin hole；Described steel
Muscle (9.1) is vertically fixed in described steel plate (9.3) lower end；Described reserved otic placode (9.4) is vertically fixed on described steel plate (9.3)
End.
4. a kind of high pier support assembled prepressing device according to claim 3 it is characterised in that：Described steel plate (9.3)
It is welded with multiple ribbed stiffeners (9.2) and described reserved otic placode (9.4) between.
5. a kind of high pier support assembled prepressing device according to claim 1 it is characterised in that：Described space truss bag
Include the main couple that two panels is arranged in parallel；Described main couple is fixedly connected with each other by connecting rod (7).
6. a kind of high pier support assembled prepressing device according to claim 5 it is characterised in that：Described main couple be etc.
Waist is trapezoidal；Described main couple includes top boom (1), lower boom (2), diagonal web member (3) and perpendicular web member (4)；Described top boom (1) edge
Vertical direction is arranged in parallel above described lower boom (2)；Described top boom (1) length is less than described lower boom (2) length；Institute
State and between top boom (1) and described lower boom (2), be connected with multiple described diagonal web members (3) and described perpendicular web member (4).
7. a kind of high pier support assembled prepressing device according to claim 1 it is characterised in that：Described hydraulic jack
(14) cylinder ends are removably connected with described second stress distribution beam group；Described hydraulic jack (14) is described second
Installation site in stress distribution beam group is adjustable；The tailpiece of the piston rod of described hydraulic jack (14) supports the first stress distribution beam
Group.
8. a kind of high pier support assembled prepressing device according to claim 1 it is characterised in that：Described first stress divides
Join beam group and include transverse distribution beam (10) and upper longitudinal distribution beam (11)；Described upper transverse distribution beam (10) is fixed in described vertical
The bottom of the lower boom (2) of body truss；Described longitudinal distribution beam (11) is fixed in the bottom of described upper transverse distribution beam (10).
9. a kind of high pier support assembled prepressing device according to claim 1 it is characterised in that：Described second stress divides
Join beam group and include lower transverse distribution beam (12) and lower longitudinal distribution beam (13)；Described lower transverse distribution beam (12) is fixed in described
Frame upper end；Described lower longitudinal distribution beam (13) is fixed in described lower transverse distribution beam (12) upper end.
10. a kind of high pier support assembled preloading method it is characterised in that：Install as claim 1 institute on treating pre-compression stand
Described high pier support assembled prepressing device is simultaneously connected by a kind of high pier support assembled prepressing device stated with bridge pier (8)；Logical
Overregulate hydraulic jack (14) progressively symmetrical to support apply to complete bridge pier (8) is applied while downward prefabricating load to
On prestretching load；Observation draws the deformation values that bridge pier (8) is produced in the presence of corresponding load to support, and according to this deformation
Value analytical calculation draws elastic deformation value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610999433.1A CN106400694B (en) | 2016-11-14 | 2016-11-14 | A kind of high pier stent assembled prepressing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610999433.1A CN106400694B (en) | 2016-11-14 | 2016-11-14 | A kind of high pier stent assembled prepressing device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106400694A true CN106400694A (en) | 2017-02-15 |
| CN106400694B CN106400694B (en) | 2018-07-03 |
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ID=59230759
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610999433.1A Active CN106400694B (en) | 2016-11-14 | 2016-11-14 | A kind of high pier stent assembled prepressing device and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN106400694B (en) |
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| CN109252447A (en) * | 2018-09-28 | 2019-01-22 | 东莞理工学院 | A kind of precompressed operating method of high-altitude king-post overarm brace |
| CN111560856A (en) * | 2020-05-28 | 2020-08-21 | 广西交科集团有限公司 | Construction method for layering pouring concrete beam on soft soil foundation |
| CN113417210A (en) * | 2021-07-19 | 2021-09-21 | 中铁大桥局第七工程有限公司 | Ground pre-pressing device and method for tower column cross beam support |
| CN113914220A (en) * | 2021-09-17 | 2022-01-11 | 山东高速工程建设集团有限公司 | Pre-compaction device of cast-in-place beam bracket |
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| CN111560856A (en) * | 2020-05-28 | 2020-08-21 | 广西交科集团有限公司 | Construction method for layering pouring concrete beam on soft soil foundation |
| CN111560856B (en) * | 2020-05-28 | 2022-02-08 | 广西交科集团有限公司 | Construction method for layering pouring concrete beam on soft soil foundation |
| CN113417210A (en) * | 2021-07-19 | 2021-09-21 | 中铁大桥局第七工程有限公司 | Ground pre-pressing device and method for tower column cross beam support |
| CN113914220A (en) * | 2021-09-17 | 2022-01-11 | 山东高速工程建设集团有限公司 | Pre-compaction device of cast-in-place beam bracket |
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| Publication number | Publication date |
|---|---|
| CN106400694B (en) | 2018-07-03 |
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