CN203741729U - Pre-stress supporting system used for bridge incremental launching construction method - Google Patents

Pre-stress supporting system used for bridge incremental launching construction method Download PDF

Info

Publication number
CN203741729U
CN203741729U CN201420035964.5U CN201420035964U CN203741729U CN 203741729 U CN203741729 U CN 203741729U CN 201420035964 U CN201420035964 U CN 201420035964U CN 203741729 U CN203741729 U CN 203741729U
Authority
CN
China
Prior art keywords
steel strand
falsework
incremental launching
fixed support
stressed
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.)
Expired - Fee Related
Application number
CN201420035964.5U
Other languages
Chinese (zh)
Inventor
郑四卿
胡隽
邓文琴
曹玉贵
罗辉
徐文胜
Original Assignee
郑四卿
胡隽
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 郑四卿, 胡隽 filed Critical 郑四卿
Priority to CN201420035964.5U priority Critical patent/CN203741729U/en
Application granted granted Critical
Publication of CN203741729U publication Critical patent/CN203741729U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a pre-stress supporting system used for a bridge incremental launching construction method. The pre-stress supporting system is characterized by comprising a fixed support, a temporary support, a pre-stressed steel strand, a concrete foundation, a steel plate foundation and steel strand anchoring devices, wherein the lower end of the fixed support is provided with the concrete foundation used for fixation, and the upper end of the fixed support is provided with one steel strand anchoring device used for fixing the pre-stressed steel strand; the lower end of the temporary support is provided with the steel plate foundation used for fixation, and the upper end of the temporary support is provided with the other steel strand anchoring device used for fixing the pre-stressed steel strand; the pre-stressed steel strand is connected with the fixed support and the temporary support through the steel strand anchoring devices, fixed to a side span bridge abutment through pre-embedded iron parts, and used for providing pre-stress which is balanced with stress in the horizontal direction of the supports with the incremental launching construction method. By means of the pre-stress supporting system, the number of temporary piers and the number of temporary supports can be reduced during bridge incremental launching construction, the construction processes are simplified, construction cost is lowered, construction and maintenance are easy, and the pre-stress supporting system has a good application and popularization prospect.

Description

A kind of pre-stressed support systems for bridge incremental launching construction
Technical field
The utility model belongs to bridge assembling field, more specifically, relates to a kind of pre-stressed support systems for bridge incremental launching construction.
Background technology
Bridge incremental launching construction method is to use on Austrian A Geer bridge nineteen fifty-nine the earliest, with same method, within 1962, builds up Caroni river bridge again in Venezuela.In current incremental launching construction process, also use first steel nose girder and the measure of Temporary Piers has been set between bridge pier.Incremental launching method is to apply horizontal thrust by jack, and by slideway or slide block by beam piecemeal or whole section of pushing tow forward, the beam that falls after in place, changes formal bearing.Incremental launching method has replaced hoist engine and coaster by level jack, has replaced cylinder with board-like sliding support, has improved the stress that the line supporting role of the impact that caused while startup due to hoist engine and tackle pulley and cylinder causes and has concentrated.The pushing tow of continuous beam is the most economical favourable across footpath 30~50m, if be greater than this value across footpath, needs the supplementary means such as Temporary Piers.
Incremental launching construction should use in prismatic prestressed concrete continuous beam bridge piecemeal, also can on the girder of compound beam and cable stayed bridge, use.With incremental launching method, equipment is simple, and steadily, noise is low in construction, and construction quality is good, bridge, viaduct and iso-curvature curved bridge that can be on deep valley and wide dark river course, with adopting on the bridge of curve and Ramp bridge.In the incremental launching construction process of continuous girder bridge, due to square being directly proportional of the hogging moment at fulcrum place and span, therefore the increase of bridge span will cause the very big increase of bridge internal force.In the case of the cross section of case beam and prestress steel beam intensity limited, in order to make girder can bear so large internal force in incremental launching construction process, an effective method is that Temporary Piers is set.Temporary Piers is arranged between two permanent piers of bridge, by original bridge one across be separated into two across, the span of bridge has been reduced.In incremental launching construction process, the reducing of superstructure span will make the internal force of girder correspondingly reduce.After bridge incremental launching is in place, by the stretch-draw of the later stage prestressed strand to beam body relevant position, improves the ability of structure bearing load, then Temporary Piers is removed.Like this, by Temporary Piers is set, can effectively reduce the internal force of girder in incremental launching construction process, increase the applicable span scope of incremental launching method.Be characterized in: often across a Temporary Piers is all set, can effectively reduce the area of bridge at incremental launching construction process envelope diagram of internal force, thereby just can reduce needs for incremental launching construction to increase the plain bars of configuration and the quantity of prestressed reinforcement, reduces the cost of girder; But, but greatly increase engineering quantity and the cost of Temporary Piers, can not give full play to the advantage of incremental launching construction method simultaneously.
Utility model content
For above defect or the Improvement requirement of prior art, the utility model provides a kind of pre-stressed support systems for bridge incremental launching construction method, its object is by prestress wire being set between support and end bay abutment, solves thus current incremental launching construction method support system because the technical problem that needs more stent support compared with large stress that the incremental launching construction method of bearing produces.
For achieving the above object, according to an aspect of the present utility model, a kind of pre-stressed support systems for bridge incremental launching construction is provided, has comprised fixed support 2, falsework 3, prestress wire 1, concrete foundation 10, steel plate basis 11 and steel strand anchoring device 6,9; Described fixed support lower end is provided with for fixing concrete foundation 10, and upper end is provided with the steel strand anchoring device 6 for fixing prestress wire; Described falsework lower end is provided with for fixing steel plate basis 11, and upper end is provided with the steel strand anchoring device 9 for fixing prestress wire; Prestress wire 1 is connected with described fixed support 2 and falsework 3 by described steel strand anchoring device 6, and is fixed on end bay abutment by embedded iron parts, for providing prestressing force to produce the stress in support level direction with balance incremental launching construction method.
Preferably, described pre-stressed support systems, its fixed support 2 and falsework 3 tops are provided with highly adjustable chute 7,8, for the difference in height that regulates pushing tow process to produce.
Preferably, described pre-stressed support systems, it is highly adjustable, and chute 7,8 comprises chute body and the jack 14 longitudinally arranging, described jack 14 is arranged on chute body below.
Preferably, described pre-stressed support systems, its steel strand anchoring device 6,9 is anchor ring anchor device.
Preferably, described pre-stressed support systems, described in it, 3 of falseworks are provided with two bridgings 4, for improving falsework stability.
Preferably, described pre-stressed support systems, also comprises the steel pipe diagonal brace 5 that is arranged on fixed support 2 sides.
Preferably, described pre-stressed support systems, described in it at the bottom of diagonal brace 5 be provided with anchoring pile 12.
In general, the above technical scheme of conceiving by the utility model compared with prior art, can obtain following beneficial effect:
(1) above fixed support and falsework, fix by prestress wire and end bay abutment, stretch-draw prestressing force steel strand, prestress wire can provide the prestressing force in horizontal direction, thereby the stress that balance incremental launching construction method produces, reduce Temporary Piers and falsework in bridge incremental launching construction, simplify construction process and reduce construction cost, thereby reduce engineering quantity and cost, can give full play to the advantage of incremental launching construction method, preferred stretch-draw value is 50% left and right that produces horizontal stress in pushing tow process.
(2) the utility model technology has solved in pushing tow process, the discrepancy in elevation problem that bridge pad occurs sometimes, adopt adjustable for height chute, can adjust according to fixed bearing the height of temporary support in beam section pushing tow process, there is thereby reduce beam section the problem that stress is concentrated, make beam section stressed more reasonable in pushing tow process.
(3) construction of the utility model technology is simple, mainly adopts prestress wire, applies small prestressing technique, and cost is low, is easy to construction and safeguards, has good application prospect.
Brief description of the drawings
Fig. 1 is pre-stressed support systems schematic diagram;
Fig. 2 is a top of the trellis adjustable slide groove structural representation;
Fig. 3 is prestress wire fixing means schematic diagram.
In institute's drawings attached, identical Reference numeral is used for representing identical element or structure, wherein: 1 is prestress wire, 2 is fixed support, and 3 is falsework, and 4 is two bridgings, 5 is steel pipe diagonal brace, 6 is the steel strand anchoring device of fixed support upper end, and 7 is the adjustable chute at fixed support top, and 8 is the adjustable chute at falsework top, 9 is the steel strand anchoring device at falsework top, 10 is concrete foundation, and 11 is steel plate basis, and 12 is anchoring pile.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.In addition,, in each embodiment of described the utility model, involved technical characterictic just can combine mutually as long as do not form each other conflict.
A kind of pre-stressed support systems for bridge incremental launching construction that the utility model provides, as shown in Figure 1, comprises fixed support 2, falsework 3 and prestress wire 1.
Described fixed support 2 lower ends are provided with for fixing concrete foundation 10, and upper end is provided with the steel strand anchoring device 6 for fixing prestress wire, and top is provided with highly adjustable chute 7, for the difference in height that regulates pushing tow process to produce.Described steel strand anchoring device 6, is preferably anchor ring anchor device.If desired, described fixed support one side is provided with steel pipe diagonal brace 5, and diagonal brace bottom is provided with anchoring pile 12, the dark 1m to 3m of anchoring pile.
Described falsework 3 lower ends are provided with for fixing steel plate basis 11, and upper end is provided with the steel strand anchoring device 9 for fixing prestress wire, and top is provided with highly adjustable chute 8, as shown in Figure 2, and for the difference in height that regulates pushing tow process to produce.Described steel strand anchoring device 9, is preferably anchor ring anchor device.Between described falsework, be provided with two bridgings 4, for improving falsework stability.
Described adjustable chute 7,8, as shown in Figure 2, comprise adjustable chute body and the jack 14 longitudinally arranging, described jack 14 is arranged on the below of chute body, by changing the pressure of jack, thereby regulates chute height to regulate the difference in height producing in pushing tow process.
Prestress wire 1 is by described steel strand anchoring device 6,9 are connected with described fixed support 2 and falsework 3, and be fixed on end bay abutment by embedded iron parts, before pushing tow, pre-stretch-draw prestressing force steel strand anchoring, its stretch-draw value is 50% left and right that produces horizontal force size in pushing tow process, for providing prestressing force to produce the stress in support level direction with balance incremental launching construction method, as shown in Figure 3.
The key step of bridge incremental launching construction method is: first on end bay with loop wheel machine install bin girder segment, then closed up to the propelling of main span span centre by bridge two ends by hydraulic jack.The utility model provide for bridge incremental launching construction method, comprise the steps:
First set up some fixed supports 2 at end bay, prepare for lifting box girder segment, divide and loop wheel machine lifting requirements according to box girder segment, when each segment lifting, preferably will have 4 fixed supports to support 2.Fixed support bottom near end bay abutment is provided with the basis 10 that steel concrete is built, and at the bottom of falsework, can use steel plate as basis 11 for 3.End bay Abutment can be provided with the embedded iron parts for fixing prestress wire 1.
Prestress wire 1, by being arranged on the fastening devices 6 of fixed support and falsework upper end, 9 fix with it, fix by embedded iron parts and end bay abutment, before pushing tow, pre-stretch-draw prestressing force steel strand anchoring, its stretch-draw value is 50% left and right that produces horizontal force size in pushing tow process, the horizontal force producing for balance pushing tow process, the length of steel strand can be adjusted according to actual needs.
Middle 3 of the falseworks of end bay can be established two bridgings 4 and be fixed, a steel pipe diagonal brace 5 is set in the middle of end bay section, the larger steel pipe of fixed support available model of its connection is material, and the other end connects an anchoring pile 12, carrys out thus the pulling force producing in balance pushing tow process.Middle falsework top arranges adjustable chute 8, and the little height producing in adjustable pushing tow process is poor, and near end bay abutment and intermediate pier top arranges fixing chute, with the actual elevation of clamped beam section.
In across only a fixed support 2 being set, its top arranges adjustable chute 7, bottom arranges a rational pile foundation according to actual conditions, same steel pipe diagonal brace 5 connects a section of ground and establishes an anchoring pile 1, with the effect producing in balance pushing tow process.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims (7)

1. the pre-stressed support systems for bridge incremental launching construction, it is characterized in that, comprise fixed support (2), falsework (3), prestress wire (1), concrete foundation (10), steel plate basis (11) and steel strand anchoring device (6,9); Described fixed support lower end is provided with for fixing concrete foundation (10), and upper end is provided with the steel strand anchoring device (6) for fixing prestress wire; Described falsework lower end is provided with for fixing steel plate basis (11), and upper end is provided with the steel strand anchoring device (9) for fixing prestress wire; Prestress wire (1) is connected with described fixed support (2) and falsework (3) by described steel strand anchoring device (6), and be fixed on end bay abutment by embedded iron parts, for providing prestressing force to produce the stress in support level direction with balance incremental launching construction method.
2. pre-stressed support systems as claimed in claim 1, it is characterized in that, described fixed support (2) and falsework (3) top are provided with highly adjustable chute (7,8), for the difference in height that regulates pushing tow process to produce.
3. pre-stressed support systems as claimed in claim 2, it is characterized in that, described height is adjustable, and chute (7,8) comprises chute body and the jack (14) longitudinally arranging, and described jack (14) is arranged on chute body below.
4. pre-stressed support systems as claimed in claim 1, is characterized in that, described steel strand anchoring device (6,9) is anchor ring anchor device.
5. the pre-stressed support systems as described in claim 1 to 4 any one, is characterized in that, is provided with two bridgings (4), for improving falsework stability between described falsework (3).
6. pre-stressed support systems as claimed in claim 5, is characterized in that, also comprises the steel pipe diagonal brace (5) that is arranged on fixed support (2) side.
7. pre-stressed support systems as claimed in claim 6, is characterized in that, at the bottom of described diagonal brace, (5) portion is provided with anchoring pile (12).
CN201420035964.5U 2014-01-21 2014-01-21 Pre-stress supporting system used for bridge incremental launching construction method Expired - Fee Related CN203741729U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420035964.5U CN203741729U (en) 2014-01-21 2014-01-21 Pre-stress supporting system used for bridge incremental launching construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420035964.5U CN203741729U (en) 2014-01-21 2014-01-21 Pre-stress supporting system used for bridge incremental launching construction method

Publications (1)

Publication Number Publication Date
CN203741729U true CN203741729U (en) 2014-07-30

Family

ID=51341550

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420035964.5U Expired - Fee Related CN203741729U (en) 2014-01-21 2014-01-21 Pre-stress supporting system used for bridge incremental launching construction method

Country Status (1)

Country Link
CN (1) CN203741729U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105297636A (en) * 2015-11-24 2016-02-03 葛洲坝机械工业有限公司 Temporary pier applicable to bridge erection in water and construction method
CN111809532A (en) * 2020-08-03 2020-10-23 中铁二十三局集团第二工程有限公司 Construction method for controlling displacement of pushing temporary pier stud

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105297636A (en) * 2015-11-24 2016-02-03 葛洲坝机械工业有限公司 Temporary pier applicable to bridge erection in water and construction method
CN111809532A (en) * 2020-08-03 2020-10-23 中铁二十三局集团第二工程有限公司 Construction method for controlling displacement of pushing temporary pier stud

Similar Documents

Publication Publication Date Title
CN104005338B (en) A kind of long-span cablestayed bridges tower beam three-dimensional temporary consolidation structure
CN103938552B (en) Steel truss arched bridge self-balancing cantilever construction method and the spacing bearing of main pier
CN202492807U (en) Steel box girder walking-type multi-point incremental launching construction system
CN102839607B (en) Construction method for cantilever assembly steel arches for cast-in-situ large-span concrete arch bridge
CN106522112A (en) Cable-stayed bridge side span beam section erecting system and method thereof
CN101158146A (en) Cable-stayed bridge main-beam sliding form frame system and construction method
CN204690605U (en) The self-propelled triangular truss hanging basket of large span beam bridge
CN110804952B (en) Suspension bridge beam prefabrication and assembly construction process
CN102505636A (en) Construction method of No.0 block of continuous rigid frame bridge of double-thin-wall pier
CN207828792U (en) Removable support for the installation of urban steel bridges beam
CN203741729U (en) Pre-stress supporting system used for bridge incremental launching construction method
CN102409619B (en) Method for improving cross integrity of bridge deck structure of multi-girder type combined small box girder bridge
CN108342982A (en) A kind of hybrid combining girder stayed-cable bridge cable crane track cable beam-ends is from anchor structure
CN105603879B (en) The construction technology in large-scale pipeline crossing construction cat road
CN110878535A (en) Diagonal tension load-adjusting system for reinforcing rigid truss bridge and reinforcing method thereof
CN204728196U (en) Semi-monolithic formula is seamless, and Ramp bridge end of the bridge constructs
CN104060545B (en) Can be used for the suspension trestle waterborne of pumping of concrete and construction method thereof and purposes
CN205242238U (en) Be applied to self anchored suspension bridge's main girder structure
CN205907586U (en) Device of concrete is carried in wide riverway water facial height platform
CN103774554A (en) Main tower traction erecting method of self-anchored suspension bridge box girder
CN204039898U (en) Can be used for the suspension trestle waterborne of pumping of concrete
CN211815595U (en) Lower tower column tension and compression structure for cable tower
CN103835238B (en) A kind of high pier cable stayed bridge No. 0 block non-stand construction method and the structure in constructing
CN207987749U (en) Ride cable-styled erection crane
CN206538687U (en) Cable-stayed bridge end bay beam section construction system

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140730

Termination date: 20200121

CF01 Termination of patent right due to non-payment of annual fee