CN103255721A - High-level bridge construction method - Google Patents
High-level bridge construction method Download PDFInfo
- Publication number
- CN103255721A CN103255721A CN2013102013162A CN201310201316A CN103255721A CN 103255721 A CN103255721 A CN 103255721A CN 2013102013162 A CN2013102013162 A CN 2013102013162A CN 201310201316 A CN201310201316 A CN 201310201316A CN 103255721 A CN103255721 A CN 103255721A
- Authority
- CN
- China
- Prior art keywords
- jack
- bridge
- pontic
- push rod
- extension device
- 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
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a high-level bridge construction method which mainly comprises the following steps that bridge pile posts are built, the ground below the position where a bridge body is to be built is leveled and compacted, a plurality of round caves are dug, a jack and a push rod self-locking lengthening device are arranged in each round cave, two bridge pile posts are selected in each bridge body area and used for locating and guiding, then a bridge body formwork is installed on the compacted ground for prefabricating the bridge body, jacking operation is carried out on the bridge body through the jacks and the push rod self-locking lengthening devices arranged under the bridge body in advance, after the bridge body is jacked to the bottom and flushed with the top of a support installed on each bridge pile post in advance, the push rod self-locking lengthening devices support the bridge body on the preset position stably, the jacks are deflated and reset, the bridge body formwork of a cavity part above the bridge pile posts is installed, reinforcing steel bars are tied, then concrete is poured, and after the concrete is solidified and meets the requirements for strength, the jacks and the push rod self-locking lengthening devices are dismantled. The high-level bridge construction method lowers labor cost of construction, and is high in construction efficiency and construction speed.
Description
Technical field
The present invention relates to building field, particularly a kind of viaduct job practices.
Background technology
Along with economic fast development, the significantly increase of urban population, urban transport problems becomes the center that people pay close attention to day by day.Viaduct and track traffic become the important channel that solves urban transport problems.
The simple procedure of the construction of viaduct pontic is at present: after the bridge pier post is constructed, leveling compacting ground (even water one deck cement or put the lumps of wood), thickly dotted steel pipe support is installed thereon again, then installation form assembling reinforcement, concreting, treat that concrete setting meets requirement of strength, finally dismantle steel pipe support and template, and will support with steel pipe and transport.So build pontic safe and reliable, but maximum shortcoming is, the installing/dismounting round transport of steel pipe for a large amount of supports, time-consuming, cost is very large, takies the duration very long.
After one section little height of the multiplex hydraulic jack jack-up of the jacking of bridge construction thing, with alternative, withstand this height, jack resets, then adds cushion block under jack, then jack-up ... so repeatedly, time-consuming oversize.
The utility model patent of patent No. ZL201120278106.X discloses a kind of Pneumatic jack that the large stroke of large-tonnage requires that meets.Although in this patent, disclosed technology can realize large stroke and large-tonnage requirement, but still there are two major defects, the one, the long period maintains jack-up weight state, this technical requirements to jack is very high, and there is potential safety hazard, the 2nd, the height of jacking is subject to the restriction of jack stroke, height that can not unconfined expansion jacking, because the stroke that improves jack is higher to the manufacturing technology requirement of jack, the jacking stroke is unsuitable too high, and guide cylinder generally is advisable with layer 2-4 with one heart.
The utility model of patent No. ZL201220435385.0 discloses a kind of jack and push rod self-locking length extension device assembly, but adds frame and self-locking lengthening push rod on the jack basis.In carrying out the jacking process, first by the jack pressure release, between jack and weight, put into push rod; Weight is pushed up to desired height, and the self-locking device that utilizes frame support face center to install is fixed push rod, by the jack-up weight, is rested on the jack-up position.Now, jack can carry out pressure release, inserts another section push rod between the push rod of jack top and former jack-up in one section space, and it is connected with the top push rod, repeats above-mentioned jack-up process, weight by jacking to desired location.This utility model has solved the problem that in above-mentioned patent ZL201120278106.X, the Pneumatic jack jacking time is unsuitable long and top lifting height is limited.
Summary of the invention
The present invention is for solving time-consuming that existing viaduct work progress exists, cost is very large, take the shortcomings such as long in time limit, a kind of viaduct job practices is provided, and the jack in utility model ZL20122 0435385.0 and push rod self-locking length extension device assembly are applied in work progress, overcome the shortcoming of prior art.
In order to solve the problems of the technologies described above, the invention provides following technical scheme: a kind of viaduct job practices comprises the steps:
(a) build the bridge pier post, after the bridge pier post is constructed, the ground of bridge construction body with upper/lower positions is wanted in the leveling compacting, dig in position some round holes, the inner bottom part leveling compacting of circle hole, circle is placed jack and push rod self-locking length extension device in hole, in every pontic zone, selects two root bridge piles in order to positioning and guiding.
(b) then the bridge main body template is installed on good ground in compacting, assembling reinforcement, concreting, carry out the prefabricated of pontic, reserves the cavity of bridge pier post on template;
(c), after the pontic concrete setting and reaching requirement of strength, with the jack and the push rod self-locking length extension device that are placed in advance bottom, carry out the jack-up operation;
(d) press the using method of jack and push rod self-locking length extension device, progressively by the pontic jacking to its bottom surface with on the bridge pier post in advance mounted bearing top concordant after, push rod self-locking length extension device firmly is supported on preposition by pontic, and the jack pressure release resets;
(e) template the assembling reinforcement of hollow sectors pontic on the bridge pier post are installed, then concreting, after concrete setting reaching requirement of strength, remove jack and push rod self-locking length extension device.
The present invention further is specially:
The jack used in above-mentioned steps can be Pneumatic jack or hydraulic jack.
In step (a), circle hole inside wall is placed cylindrical baffle, is used for preventing that the soil of circle hole wall is scattering in round hole.
In step (a), push rod self-locking length extension device top is concordant with the template top of installing on ground line, self-locking length extension device top just becomes the part of template like this, and now, in step (b), the template of installation will reserve the space at self-locking length extension device top simultaneously.
Perhaps, in step (a), push rod self-locking length extension device top is concordant with ground line, and now, in step (b), the template of installation will cover self-locking length extension device top.
In step (a), if the jack use is Pneumatic jack, also need the pipeline of the turnover gas of Pneumatic jack and barometric surveying control use is caused to position in addition, the shared zone of pontic.
In step (a), between pontic described to be built and bridge pier post, guide wheel system also is installed, this guide wheel system comprises guide wheel bracket and directive wheel, and guide wheel bracket is fixed on pontic below to be built, and guide wheel rim props up the bridge pier outer surface of column.By pontic jack-up to its bottom surface with on the bridge pier post in advance mounted bearing top concordant after, push rod self-locking length extension device firmly is supported on pontic on this position, the jack pressure release resets.If the bridge pier post as positioning and guiding is square, respectively configuring a positioning guide pulleys, totally 4 on four faces around it again; If for circular, press 120 again around it as the bridge pier post that is decided to be guiding
.divide equally 3 positioning guide pulleys of configuration.
In step (b), when prefabricated pontic, when the assembling reinforcement on every side of bridge pier post, the one, guide wheel bracket is fixed on the tram of pontic below, the wheel rim that guarantees to lead is close to the bridge pier outer surface of column; The 2nd, the reinforcing bar of the pontic inside around the bridge pier post stretches out the side of pontic, forms and reveals muscle.Reveal the long 5cm ~ 10cm of muscle, dew muscle end is apart from bridge pier outer surface of column 3cm ~ 5cm, so as with the steel of filling-up hole in the future
Muscle connects.
The present invention compared with prior art, have following beneficial effect: viaduct job practices of the present invention adopts builds bridge main body on the ground, needn't use a large amount of scaffolds, in construction, only need less workman just can complete setting up of whole bridge, reduced the cost of labor of construction, and efficiency of construction is high, speed of application is fast.
The accompanying drawing explanation
Fig. 1 is the top view in viaduct work progress of the present invention;
The A that Fig. 2 is Fig. 1-A sectional view.
1-bridge main body, 2-bridge pier post, 3-jack and push rod self-locking length extension device, 4-template, 5-ground, 6-dew muscle, 7-guide wheel system.
The specific embodiment
Further illustrate below in conjunction with specific embodiments content of the present invention.
Should understand, embodiment is only for illustrating the present invention, and protection scope of the present invention is not limited to following embodiment, all modifications of doing on basis of the present invention, is equal to replacement, improvement etc., all should be included in protection scope of the present invention.
Consult Fig. 1 and Fig. 2 simultaneously, take Pneumatic jack as example, the viaduct job practices comprises the following steps:
(a) build bridge pier post 2 by existing method, after bridge pier post 2 is constructed, the ground 5 of bridge construction body with upper/lower positions is wanted in the leveling compacting, and the ground 5 after compacting should be enough to carry the load of pontic prefabricated in follow-up work progress 1.According to designing and calculating, dig in position Bing Yuan hole, some round holes inside wall and place cylindrical baffle, be used for preventing that the soil on the wall of circle hole is scattering in round hole, baffle plate can be steel cylinder, plastic barrel, plank or other materials, circle is placed jack and push rod self-locking length extension device 3 in hole, the quantity in circle hole is determined according to the quantity of jack used in work progress and push rod self-locking length extension device 3, the tonnage of each Pneumatic jack in jack and push rod self-locking length extension device 3 and gross tonnage arrange according to the weight of pontic to be determined, the gross tonnage of General Requirements Pneumatic jack is more than 1.3 times of pontic 1 gross tonnage, to ensure enough safety factor.The inner bottom part leveling compacting of circle hole, the round hole inner bottom surface after compacting is enough to carry the load of the pontic 1 transmitted by jack and push rod self-locking length extension device 3 in jack and push rod self-locking length extension device 3 and later work progress.The push rod upper surface that jack and push rod self-locking length extension device 3 expose above is concordant with template 4 tops of installing on ground line outside it, the push rod upper surface exposed so just becomes the part of template, play the effect of template, also to cause appropriate location in addition, the shared zone of pontic 1 to the pipeline of the use such as the turnover gas of Pneumatic jack and barometric surveying control in this step, to guarantee easy operating in work progress.Guide wheel system 7 will make the directive wheel outer rim contact with the bridge pier outer surface of column, make guide wheel rim top apart from pontic soffit 30 ~ 40cm simultaneously, push up its soffit upper surface of support preset with the bridge pier column top when concordant when pontic like this, directive wheel still in action.Every pontic 1 zone selects two root bridge piles in order to positioning and guiding.
(b) around the hole then reserved on good ground 5 and for the bridge pier post in compacting, bridge main body template 4 is installed, assembling reinforcement, concreting, carry out the prefabricated of pontic 1, template around the hole that the bridge pier post reserves is apart from bridge pier outer surface of column 10cm ~ 15cm, stretch out the hole of accomplishing fluently in advance from template and reveal muscle 6, reveal muscle 6 ends apart from bridge pier outer surface of column 3cm ~ 5cm.Template 4 also can cover the push rod upper surface that push rod self-locking length extension device 3 exposes.
(c) build pontic 1 concrete, concrete setting and reach requirement of strength after, with being placed on following jack in advance and push rod self-locking length extension device 3 carries out the jack-up operation.The all Pneumatic jack synchronization jobs of jack-up operation requirements, guarantee that each Pneumatic jack move speed is identical, guarantees pontic 1 not run-off the straight in jack-in process.Each lengthen push rod before, guarantee that the rear Pneumatic jack venting of having worked reliably of push rod self-locking length extension device resets, at one section push rod of each push rod bottom access, the length of all push rods of access wants consistent each time.When jack-up is arrived certain altitude, push rod self-locking length extension device will be installed sliding sleeve and support bar (consulting utility model patent ZL201220435385.0 jack and push rod self-locking length extension device assembly).In the situation that guarantee that push rod self-locking length extension device is installed sliding sleeve and support bar is safe and reliable, proceed jacking work.
(d) the pontic 1 top upper surface of support preset with the bridge pier column top to its soffit concordant after, under the secure support of the sliding sleeve support bar of push rod self-locking length extension device and last installation, pontic 1 position is fixed.Pneumatic jack can be exitted and be resetted.
(e) template the assembling reinforcement of hollow sectors pontic 1 on bridge pier post 2 to be installed, in order being connected firmly, the reinforcing bar of this colligation and the dew muscle of pontic 1 side before to be welded together, then concreting.After concrete setting reaching requirement of strength, Pneumatic jack is inflated whole pontic 1 is risen to some centimetres, and the back-up block of push rod self-locking length extension device is drawn in, and push rod can take out from bottom piecemeal.After back-up block draws in, the synchronous slowly venting of Pneumatic jack, pontic 1 is steadily got back to original place.Remove Pneumatic jack and push rod self-locking length extension device 3(and comprise the slider support bar) and template.
When the inner gas pressure in the effective jack-up inflation of Pneumatic jack cross section is 0.1MPa, produce approximately 10 Dun/㎡ of jack-up power, if inner gas pressure is 0.5 MPa, jack-up power is about 50 Dun/㎡, if the pontic area is 1000 ㎡, two meters of concrete thickness average out to, concrete proportion is 2.5 tons/m
3, this section pontic gross weight is 5000 tons so, if the Pneumatic jack inner gas pressure adopts 0.5 MPa, the total effective inflation area of required Pneumatic jack is about 100 ㎡, accounts for 10% of pontic area.
Claims (9)
1. a viaduct job practices, is characterized in that, comprises the steps:
(a) build the bridge pier post, after the bridge pier post is constructed, the following ground of bridge construction body is wanted in the leveling compacting, dig some round holes, the inner bottom part leveling compacting of circle hole, circle is placed jack and push rod self-locking length extension device in hole, in every pontic zone, selects two root bridge piles in order to positioning and guiding;
(b) then the bridge main body template is installed on good ground in compacting, assembling reinforcement, concreting, carry out the prefabricated of pontic, reserves the cavity of bridge pier post on template;
(c), after the pontic concrete setting and reaching requirement of strength, with the jack and the push rod self-locking length extension device that are placed in advance bottom, carry out the jack-up operation;
(d) press the using method of jack and push rod self-locking length extension device, progressively by the pontic jacking to its bottom surface with on the bridge pier post in advance mounted bearing top concordant after, push rod self-locking length extension device firmly is supported on preposition by pontic, and the jack pressure release resets;
(e) template the assembling reinforcement of hollow sectors pontic on the bridge pier post are installed, then concreting, after concrete setting reaching requirement of strength, remove jack and push rod self-locking length extension device.
2. a kind of viaduct job practices as described as claim 1, is characterized in that, the round hole in described step (a), and its inside wall is placed cylindrical baffle.
3. a kind of viaduct job practices as claimed in claim 1, it is characterized in that, in described step (a), self-locking length extension device top is concordant with the template top of installing on ground line, self-locking length extension device top becomes the part of template like this, now, in step (b), the template of installation reserves the space at self-locking length extension device top simultaneously.
4. a kind of viaduct job practices as claimed in claim 1, is characterized in that, in described step (a), self-locking length extension device top is concordant with ground line, and now, in step (b), the template of installation covers self-locking length extension device top.
5. a kind of viaduct job practices as claimed in claim 1, it is characterized in that, in described step (a), between pontic to be built and bridge pier post, guide wheel system also is installed, this guide wheel system comprises guide wheel bracket and directive wheel, guide wheel bracket is fixed on pontic below to be built, and guide wheel rim is close to the bridge pier outer surface of column.
6. the guide wheel system of installing in a kind of viaduct job practices as claimed in claim 5, is characterized in that, if be square as the bridge pier post of positioning and guiding, around it, on four faces, respectively configuring a positioning guide pulleys, totally 4.
7. the guide wheel system of installing in a kind of viaduct job practices as claimed in claim 5, is characterized in that, if be circle as the bridge pier post that is decided to be guiding, presses 120 again around it
.divide equally 3 positioning guide pulleys of configuration.
8. a kind of viaduct job practices as claimed in claim 1, is characterized in that, in described step (b), the reinforcing bar of the pontic inside around the bridge pier post stretches out the side of pontic, form and reveal reinforcing bar, reveal the long 5cm ~ 10cm of muscle, reveal the muscle end apart from bridge pier outer surface of column 3cm ~ 5cm.
9. a kind of viaduct job practices as claimed in claim 1, is characterized in that, described jack is Pneumatic jack or hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102013162A CN103255721A (en) | 2013-05-27 | 2013-05-27 | High-level bridge construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102013162A CN103255721A (en) | 2013-05-27 | 2013-05-27 | High-level bridge construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103255721A true CN103255721A (en) | 2013-08-21 |
Family
ID=48959905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102013162A Pending CN103255721A (en) | 2013-05-27 | 2013-05-27 | High-level bridge construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103255721A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741603A (en) * | 2013-12-26 | 2014-04-23 | 武汉二航路桥特种工程有限责任公司 | Method for conducting gapless bridge dropping after bridge is lifted for large height and height adjusting device thereof |
| CN104670783A (en) * | 2014-12-26 | 2015-06-03 | 中铁二局股份有限公司 | Steel beam transport device and steel beam mounting method |
| CN108468277A (en) * | 2018-05-14 | 2018-08-31 | 浙江中建路桥设备有限公司 | One kind, which is lifted, turns to installing type bl bridge layer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3660657B2 (en) * | 2002-10-10 | 2005-06-15 | 株式会社鴻池組 | Construction method of viaduct |
| JP3905021B2 (en) * | 2002-11-18 | 2007-04-18 | 株式会社鴻池組 | Construction method of viaduct pier |
| CN201777797U (en) * | 2009-11-24 | 2011-03-30 | 上海振华重工(集团)股份有限公司 | Elevating device for lifting complete overhead traveling crane |
| CN102352603A (en) * | 2011-08-19 | 2012-02-15 | 张云祥 | Viaduct bridge construction method and pneumatic jack used in method |
| CN202808259U (en) * | 2012-08-29 | 2013-03-20 | 张云祥 | Jack and push rod self-locking lengthening apparatus assembly |
-
2013
- 2013-05-27 CN CN2013102013162A patent/CN103255721A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3660657B2 (en) * | 2002-10-10 | 2005-06-15 | 株式会社鴻池組 | Construction method of viaduct |
| JP3905021B2 (en) * | 2002-11-18 | 2007-04-18 | 株式会社鴻池組 | Construction method of viaduct pier |
| CN201777797U (en) * | 2009-11-24 | 2011-03-30 | 上海振华重工(集团)股份有限公司 | Elevating device for lifting complete overhead traveling crane |
| CN102352603A (en) * | 2011-08-19 | 2012-02-15 | 张云祥 | Viaduct bridge construction method and pneumatic jack used in method |
| CN202808259U (en) * | 2012-08-29 | 2013-03-20 | 张云祥 | Jack and push rod self-locking lengthening apparatus assembly |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741603A (en) * | 2013-12-26 | 2014-04-23 | 武汉二航路桥特种工程有限责任公司 | Method for conducting gapless bridge dropping after bridge is lifted for large height and height adjusting device thereof |
| CN103741603B (en) * | 2013-12-26 | 2016-01-20 | 武汉二航路桥特种工程有限责任公司 | The large height of bridge raise after gapless to fall beam method and adjustable height device thereof |
| CN104670783A (en) * | 2014-12-26 | 2015-06-03 | 中铁二局股份有限公司 | Steel beam transport device and steel beam mounting method |
| CN108468277A (en) * | 2018-05-14 | 2018-08-31 | 浙江中建路桥设备有限公司 | One kind, which is lifted, turns to installing type bl bridge layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108193608A (en) | The cast-in-place road gully of mobile moldbase and construction method | |
| CN103132537A (en) | Steel latticed column homocentric-square-shaped concrete bearing platform combination type tower crane base structure and construction method | |
| CN107044142B (en) | Adjustable reinforcement deviation correcting method and structure for reducing uneven settlement of house | |
| CN103938634A (en) | Deep foundation pit supporting structure and construction method | |
| CN103255721A (en) | High-level bridge construction method | |
| KR20170007975A (en) | The Construction Method and Structure of linear curve-shaped non-excavation tunnel with using Forepoling Board and ground reinforcement | |
| CN104652428B (en) | A kind of piling strtucture of falling umbrella | |
| CN218324864U (en) | Reserved shield underpass open cut tunnel system | |
| CN203034476U (en) | Tower crane base structure in type of combination of steel latticework columns and concrete bearing platform shaped like Chinese character 'hui' | |
| CN109403224B (en) | Cover plate culvert cast-in-place roof truss type slip form system and construction method | |
| CN205243529U (en) | Tunnel secretly digs lining construction platform truck | |
| CN204780635U (en) | Super wide nonprismatic continuous beam 0# piece concreties and relieves construction structures | |
| CN204551454U (en) | A kind of piling strtucture of falling umbrella | |
| CN204457786U (en) | The large diameter shield tunnel that digs after the dismounting of a kind of B section of jurisdiction builds subway station | |
| CN203821399U (en) | Deep foundation pit supporting structure | |
| CN207862964U (en) | A kind of land bearing platform construction system | |
| CN204940283U (en) | Gate base plate steel lining uphill running concrete construction platform | |
| CN211872669U (en) | Uneven jacking system of current bridge superstructure | |
| CN201343704Y (en) | Movable scaffolding system for casting T-shaped beam bridge flange slabs in situ | |
| CN110616714B (en) | Novel enclosure construction method for existing underground structure deepening | |
| CN108360685A (en) | Monoblock type jack-up construction method | |
| CN109371901B (en) | Pile bearing type retaining wall of cofferdam in dry period and construction method | |
| CN207296388U (en) | A kind of sliding formwork component applied to the construction of caisson cutting edge layer | |
| CN107816132B (en) | High-level tower crane single-row frame attachment structure without floor slab and construction method thereof | |
| CN105297758A (en) | Prestressed square pile and steel latticed column integrated stand column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130821 |