CN103437291A - Integral water tank preloading construction process - Google Patents
Integral water tank preloading construction process Download PDFInfo
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- CN103437291A CN103437291A CN2013103346115A CN201310334611A CN103437291A CN 103437291 A CN103437291 A CN 103437291A CN 2013103346115 A CN2013103346115 A CN 2013103346115A CN 201310334611 A CN201310334611 A CN 201310334611A CN 103437291 A CN103437291 A CN 103437291A
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Abstract
The invention discloses an integral water tank preloading construction process, which comprises the following steps of (1) support system assembly; (2) bottom die installation; (3) preloading water tank assembly; (4) gradation loading and unloading; (5) support observation; (6) support evaluation and adjustment. The invention also provides an integral preloading water tank, which comprises a water tank framework, water bags, a water tank bottom plate, surrounding side walls and a plurality of partition plates, wherein the water tank framework is built by using Bailey trestles; the water bags are arranged in the center of the water tank framework; the partition plates are arranged in the water tank framework; a tarpaulin is paved on the water tank bottom plate; the partition plates are located between the adjacent two water bags. According to the integral water tank preloading construction process disclosed by the invention, full-span large-area preloading of super-wide concrete box girders in bridge construction is realized, and the safe state of a support can be more accurately reflected. Moreover, the operation is simple, the material cost is low, the labor cost is low, and the required construction period is short. The area of preloading box girders can be adjusted according to project needs, and the defects of the traditional box girder preloading technology are made up.
Description
Technical field
The present invention relates to the concrete-bridge field of engineering technology, specifically refer to a kind of monolithic water tank precompressed construction technology.
Background technology
In reaching current bridge construction in the past, concrete box girder construction conventional construction method has sandbag preloading, water bag preloading, prefabricated section preloading, these case beam precompressed construction technology costs are relatively high, labour intensity is large, the construction period is longer, for meeting construction quality, safety, take into account cost and work efficiency simultaneously, need to start a kind of new precompressed construction technology, therefore we selected " a kind of Novel integral pre-pressing process " is innovation subject, forms a set of complete reliable construction technology for instructing the similar bridge construction.
Summary of the invention
The object of the present invention is to provide a kind of super wide concrete box girder and various monolithic water tank precompressed construction technology that needs precompressed of being applicable to, can meet the whole needs across the large tracts of land precompressed of super wide concrete box girder in bridge construction, more can accurately reflect the support safe condition, according to the size of requirement of engineering capable of regulating precompressed case beam, can effectively make up the deficiency of existing case beam precompressed technology.
For achieving the above object, monolithic water tank precompressed construction technology provided by the invention, it is after support has been set up, utilize the bed die system, adopt the full support scope of shellfish thunder sheet spelling monolithic precompressed water tank, utilize water ballast(ing) to load and carry out the support safety verification, it comprises the steps:
(1) mounting system is assembled: require to carry out the processing of bracket basis according to engineering design; Carry out support according to engineering design and set up installation;
(2) bed die is installed: after the bed die mounting bracket has been set up, according to engineering design, carry out distribution beam and bed die installation;
(3) monolithic precompressed water tank is assembled: prepare material and facility; The cleaning bed die; Spelling water tank framework; Water tank lower floor is installed in length and breadth to pull bar; Water tank surrounding side wall side board is installed; For whole section precompressed part, between adjacent two water bags, dividing plate is set, dividing plate is installed; Oil skin is installed; The water tank upper strata is installed in length and breadth to pull bar, completes the water tank spelling;
(4) hierarchical loading, unloading: by the total weight classification Ti of case beam design load, loaded and unload; Draw water and realize that load loads by high powered water pump; Be loaded on 120% case beam design load, settlement stability is also held lotus over after 24h, and the load unloading is carried out in classification;
(5) support observation: at each span centre across the case beam, 1/4, across the support top and bottom with position of the fulcrum, settlement observation point is set; Adopt level gauge to carry out box beam bracket and load absolute altitude observation in control point in front and back, hierarchical loading, uninstall process; Calculate the elastic deformation amount of support and ground, the nonelastic deformation amount of support according to the precompressed data;
(6) support evaluation, adjustment: precompressed successfully can be judged support safety, can carry out case beam pouring construction; According to the precompressed achievement, the elastic deformation beam is set after precompressed completes, the adjusting pole top mark is high, to guarantee beam body linearity.
As preferred version, hierarchical loading, unloading in described step (4), after being loaded on the precompressed design load, hold lotus time 24h at least, and carry out the Continuous Observation of support, described hierarchical loading, unloading by case beam design load gross weight 0,50%, 100%, 120%, 0 successively classification loaded and unloaded.
As preferred version, when the elastic deformation amount in described step (5) is unloading after-poppet top mark height and 100% load, support top mark height is poor; The nonelastic deformation amount is the poor of precompressed fore-stock top mark height and unloading after-poppet top mark height.
As preferred version, monolithic precompressed water tank in described step (3), comprise the water tank framework of setting up with shellfish thunder sheet, described water tank framework by water tank at the bottom of, the side wall of surrounding and a plurality of dividing plates in the water tank framework are set enclose structure and form, also be provided with a plurality of water bags, described water bag is placed in the water tank framework; Lay the waterproof oilcloth on described water tank bottom plate, described dividing plate is between two adjacent water bags.
Further, also be provided with to resist the upper and lower layer of water tank lateral pressure between described side wall in length and breadth to pull bar; Describedly to pull bar back of the body a tree, used in making timber for boats, adopt chord member vertically to arrange in length and breadth, lower floor is close to bed die to pull bar in length and breadth and lays, and upper strata is arranged in water tank top mouthful to pull bar in length and breadth; With row, to the spacing between pull bar, it is 1.5 meters in length and breadth.
Further, described water tank bottom plate is comprised of the first bamboo offset plate of steel distribution beam, first lumps of wood and the back cover laid on case beam framework shellfish thunder sheet, and described the first bamboo offset plate is laid on steel distribution beam and first lumps of wood, and described the first bamboo offset plate thickness is 1.8cm.
Further, the side wall of described water tank surrounding by with main bridge box beam bracket shellfish thunder sheet between be connected side wall shellfish thunder sheet, and side wall shellfish thunder sheet between with second lumps of wood of steel wire lashing and the second bamboo offset plate be fixed on second lumps of wood by wooden peg, form, described side wall shellfish thunder sheet comprises two-layer upper strata Bei Lei sheet and lower floor's shellfish thunder sheet vertically is set, and between described upper and lower layer shellfish thunder sheet, by fining twisted steel, with nut, is connected; Described second lumps of wood is by 30～150cm spacing lateral arrangement.
Further, described second lumps of wood is of a size of 10 * 10cm, and the thickness of described the second bamboo offset plate is 1.8cm.
The invention has the advantages that: technique of the present invention is a kind of super wide concrete box girder and various concrete-bridge engineering construction method that needs precompressed of being applicable to, the design of monolithic precompressed water tank of the present invention has realized that in bridge construction, super wide concrete box girder is whole across the large tracts of land precompressed, more can accurately reflect the support safe condition, and simple to operate, Master Cost is low, labour cost is few, the required duration is short, size according to requirement of engineering capable of regulating precompressed case beam, made up the deficiency of existing case beam precompressed technology, specific as follows:
One, after support has been set up, need to carry out stability to support, safety is calculated;
They are two years old, sand pocket and concrete balancing weight preloading need crane in the support surrounding, the sand pocket that installs and prefabricated concrete balancing weight to be carried out to lifting operation for a long time, and the present invention does not need crane to carry out for a long time lifting operation, only need the lifting material to make water tank;
Its three, sand pocket and concrete balancing weight are easy to template is polluted or damages in hoisting process, are vulnerable to rainwater impact, and the present invention only need to lift the material of making the precompressed water tank, after completing, only need high-pressure hydraulic pump just can to water filling in water tank;
Its four, the present invention has saved a large amount of people, material, machine expense than traditional sand pocket and concrete balancing weight preloading, has shortened the construction period, and easy to operate in construction, mounting or dismounting fast, the characteristics such as flexible and efficient.
The accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Fig. 2 is the structural representation of precompressed water tank of the present invention (upper and lower layer not being set in length and breadth to pull bar).
Fig. 3 is the side-looking structural representation of precompressed water tank of the present invention.
Fig. 4 is the partial structurtes schematic diagram of precompressed water tank of the present invention (upper and lower layer being set in length and breadth to pull bar).
Fig. 5 is the partial side TV structure schematic diagram of precompressed water tank of the present invention.
In figure: 1, water tank framework, 2, water tank bottom plate, 21, the steel distribution beam, 22, first lumps of wood, the 23, first bamboo offset plate, 3, side wall, 31, fining twisted steel, 32, second lumps of wood, the 33, second bamboo offset plate, 34, upper strata Bei Lei sheet, 35, lower floor's shellfish thunder sheet, 4, dividing plate, 5, water bag, 6, upper strata is in length and breadth to pull bar, 7, lower floor is in length and breadth to pull bar, 8, oil skin, 9, box beam bracket.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Monolithic precompressed water tank as shown in the figure, comprise the water tank framework 1 of setting up with shellfish thunder sheet, water tank framework 1 is by the side wall 3 of water tank bottom plate 2, surrounding and a plurality of dividing plates 4 in water tank framework 1 are set enclose structure and form, and also is provided with a plurality of water bags 5, and water bag is placed in water tank framework 1; All lay oil skin 8 on water tank bottom plate 2 and side wall 3, dividing plate 4 is between two adjacent water bags 5.
The upper strata that also is provided with to resist the water tank lateral pressure between side wall 3 in length and breadth to pull bar 6, lower floor in length and breadth to pull bar 7; To pull bar back of the body a tree, used in making timber for boats, adopt chord member vertically to arrange in length and breadth, lower floor is close to bed die to pull bar 7 in length and breadth and lays, and upper strata is arranged in water tank top mouthful to pull bar 6 in length and breadth; With row, to the spacing between pull bar, it is 1.5 meters in length and breadth; Water tank bottom plate 2 is comprised of the first bamboo offset plate 23 of steel distribution beam 21, first lumps of wood 22 and the back cover laid on case beam framework 1 shellfish thunder sheet, and the first bamboo offset plate 23 is laid on steel distribution beam 21 and first lumps of wood 22, and the first bamboo offset plate 23 thickness are 1.8cm.
The side wall 3 of water tank surrounding by with main bridge box beam bracket shellfish thunder sheet between be connected side wall shellfish thunder sheet, and side wall shellfish thunder sheet between with second lumps of wood 32 of steel wire lashing and the second bamboo offset plate 33 be fixed on second lumps of wood 32 by wooden peg, form, side wall shellfish thunder sheet comprises two-layer upper strata Bei Lei sheet 34 and lower floor's shellfish thunder sheet 35 vertically is set, and between upper and lower layer shellfish thunder sheet 34,35, by fining twisted steel 31, with nut, is connected; Second lumps of wood 32 is by 30～150cm spacing lateral arrangement; Second lumps of wood 32 is of a size of 10 * 10cm, and the thickness of the second bamboo offset plate 33 is 1.8cm.
When water tank surrounding side wall 3 arranges, side wall 3 shellfish thunder sheets should with main bridge box beam bracket 9 shellfish thunder sheets between reliably be connected, to guarantee its safety and stability.Second lumps of wood 32 is the spacing lateral arrangement in accordance with regulations, and adopts steel wire lashing between shellfish thunder sheet, and the second 33 of bamboo offset plates are fixed on second lumps of wood 32 by wooden peg.Firm for guaranteeing surrounding shellfish thunder sheet and baffle plate, between side wall 3, adopt upper strata to carry out drawing to pull bar 7 in length and breadth to pull bar 6 and lower floor in length and breadth, pull bar back of the body a tree, used in making timber for boats adopts chord member vertically to arrange, lower floor adopts Φ 20 reinforcing bars 9 to be close to bed die to pull bar 7 in length and breadth and lays, and upper strata adopts Φ 14 reinforcement placement on water tank top mouthful to pull bar 6 in length and breadth.With the spacing between row's pull bar, according to 1.5 meters settings, while having shellfish thunder rod member to disturb in part, suitably adjust.
The setting of dividing plate: for whole section precompressed part, must between adjacent two water bags, dividing plate 4 be set, dividing plate 4 is not except arranging back of the body a tree, used in making timber for boats and pull bar, remaining all with side wall 3 layouts.
Monolithic water tank precompressed construction technology of the present invention is applicable to take water support cast-in-place box girder construction easily across footpath L >=30m, its construction technology process and key points for operation:
Construction technology process respective holder system is assembled → and bed die installation → precompressed water tank is assembled → hierarchical loading, unloading → support observation → support evaluation, adjustment
Key points for operation:
The respective holder system is assembled: 1, according to engineering design, require to carry out the processing of bracket basis; 2, carry out support according to engineering design and set up installation, set up in process that strict to control the support top mark high.
After the bed die mounting bracket has been set up, according to design, carry out distribution beam and bed die installation.
Precompressed water tank assembling process flow process is as follows: material, equipment preparation → bed die cleaning → spelling water tank framework → installation water tank lower floor in length and breadth to pull bar → installation water tank side board → installation dividing plate → installation oil skin → installation water tank upper strata in length and breadth to pull bar, complete the water tank spelling.
It is as follows that monolithic precompressed water tank is installed specific requirement: 1, the peripheral shellfish thunder of water tank sheet body of wall is set up in process, arranges to support to topple preventing temporarily; 2, the upper and lower layer of water tank should be installed according to design pitch to pull bar in length and breadth, and rod material, size should meet the requirement of precompressed head height lateral pressure; 3, the dividing plate installing space is no more than 20m, and separation and abutment wall adopt shaped steel to fix; Note lap length when 4, oil skin is installed, prevent from as far as possible leaking.
Hierarchical loading, unloading are loaded and are unloaded by 0 → 50% → 100% → 120% → 0 classification of case beam design load gross weight, draw water and realize that load loads by high powered water pump, be loaded on 120% case beam design load, settlement stability is also held lotus over after 24h, and the load unloading is carried out in classification.
Hierarchical loading, unloading points for attention: 1,, before loading, case beam design load is carried out to careful calculation review, strict implement hierarchical loading system in loading procedure; 2, after being loaded on the precompressed design load, hold at least 24h of lotus, and carry out the Continuous Observation of support; 3, in loading procedure, arrange the special messenger to carry out inspection, the observation of support and precompressed water tank pull bar, once pinpoint the problems, stop immediately loading; While 4, unloading, should note the water discharge is guided to gutter, prevent from causing foundation settlement because ponding soaks.
Support observation arranges settlement observation point at each span centre across the case beam, the 1/4 support top and bottom across, position of the fulcrum.Adopt level gauge to carry out box beam bracket and load absolute altitude observation in control point in front and back, hierarchical loading, uninstall process.Calculate the elastic deformation amount of support and ground, the nonelastic deformation amount of support according to the precompressed data, elastic deformation amount=unloading after-poppet top mark is high-and the support top mark is high during 100% load, and nonelastic deformation amount=precompressed fore-stock top mark is high-and unloading after-poppet top mark is high.
Support evaluation, adjustment precompressed successfully reach and can judge support safety, can carry out case beam pouring construction.According to the precompressed achievement, the elastic deformation beam is set after precompressed completes, the adjusting pole top mark is high, to guarantee beam body linearity.
After support has been set up, utilize the bed die system, adopt the full support scope of shellfish thunder sheet spelling precompressed water tank, utilize water ballast(ing) to load and carry out the support safety verification.
Hydrostatic(al) process has following characteristics:
(1) handy and safe: hydrostatic(al) process is simple to operation, and without other special process and material requirements, general workman can operate.High trestle precompressed and overpassing expressway construction section for height more than 10m are particularly applicable, have greatly improved the safety in the precompressed process, have effectively guaranteed the safe and smooth of its speedway.
(2) time saving and energy saving: because main prefabricating load is water, by water pump, can complete loading, and the water tank framework set up and oilcloth to wrap work efficiency high, the input of greatly having saved the time, having saved labour and other equipment and materialss.The most important thing is to compare with conventional precompressed, each precompressed can be saved 5～7d time.
(3) stress equalization: conventional preloading method only to support vertically to loading, and the side form rigidity of case beam and safety are difficult to be verified by precompressed, and hydrostatic(al) process is owing to having adopted fluid load-water, it is basically identical when during precompressed, support force state and concrete are poured into a mould, checking bracket comprises rigidity and the stability of template effectively, prevents that distortion and fried mould phenomenon from appearring in web.Therefore, hydrostatic(al) process can reach the uniformity that conventional precompressed does not reach.
(4) pre-compressed effect is good: this engineering is through observation, beam type support maximum distortion rebound value is only 12mm, and steel all-round door support elastic deformation rebound value is less than 2mm, and the non-resilient compressive strain of support is eliminated substantially, pre-compressed effect is very obvious, produces a desired effect.
(5) economical and practical: the main materials of hydrostatic(al) process are oil skin, process first oil skin and need to drop into certain cost.The customization oil skin is 20 yuan/m approximately
2, every oilcloth is by 5 turnovers, and actual amortization charge is also little.This method can be saved the input of labour and other plant equipment greatly, with conventional pre-pressing process, compares, economical and practical.
(6) hydrostatic(al) process mainly, by water, is particularly useful for having abundant water resources, and engineering easily supplies water.
Claims (8)
1. a monolithic water tank precompressed construction technology, it is after support has been set up, and utilizes the bed die system, adopts the full support scope of shellfish thunder sheet spelling monolithic precompressed water tank, utilizes water ballast(ing) to load and carries out the support safety verification, it comprises the steps:
(1) mounting system is assembled: require to carry out the processing of bracket basis according to engineering design; Carry out support according to engineering design and set up installation;
(2) bed die is installed: after the bed die mounting bracket has been set up, according to engineering design, carry out distribution beam and bed die installation;
(3) monolithic precompressed water tank is assembled: prepare material and facility; The cleaning bed die; Spelling water tank framework; Water tank lower floor is installed in length and breadth to pull bar; Water tank surrounding side wall side board is installed; For whole section precompressed part, between adjacent two water bags, dividing plate is set, dividing plate is installed; Oil skin is installed; The water tank upper strata is installed in length and breadth to pull bar, completes the water tank spelling;
(4) hierarchical loading, unloading: by the total weight classification Ti of case beam design load, loaded and unload; Draw water and realize that load loads by high powered water pump; Be loaded on 120% case beam design load, settlement stability is also held lotus over after 24h, and the load unloading is carried out in classification;
(5) support observation: at each span centre across the case beam, 1/4, across the support top and bottom with position of the fulcrum, settlement observation point is set; Adopt level gauge to carry out box beam bracket and load absolute altitude observation in control point in front and back, hierarchical loading, uninstall process; Calculate the elastic deformation amount of support and ground, the nonelastic deformation amount of support according to the precompressed data;
(6) support evaluation, adjustment: precompressed successfully can be judged support safety, can carry out case beam pouring construction; According to the precompressed achievement, the elastic deformation beam is set after precompressed completes, the adjusting pole top mark is high, to guarantee beam body linearity.
2. according to the described monolithic water tank precompressed construction technology of claim 1, it is characterized in that: hierarchical loading, unloading in described step (4), after being loaded on the precompressed design load, hold lotus time 24h at least, and carry out the Continuous Observation of support, described hierarchical loading, unloading by case beam design load gross weight 0,50%, 100%, 120%, 0 successively classification loaded and unloaded.
3. according to the described monolithic water tank precompressed construction technology of claim 1, it is characterized in that: when the elastic deformation amount in described step (5) is unloading after-poppet top mark height and 100% load, support top mark height is poor; The nonelastic deformation amount is the poor of precompressed fore-stock top mark height and unloading after-poppet top mark height.
4. according to the described monolithic water tank precompressed construction technology of claim 1, it is characterized in that: the monolithic precompressed water tank in described step (3), comprise the water tank framework (1) of setting up with shellfish thunder sheet, described water tank framework is by the side wall (3) of water tank bottom plate (2), surrounding and a plurality of dividing plates (4) in water tank framework (1) are set enclose structure and form, also be provided with a plurality of water bags (5), described water bag is placed in water tank framework (1); All lay oil skin (8) on described water tank bottom plate (2) and side wall (3), described dividing plate (4) is positioned between adjacent two water bags (5).
5. according to the described monolithic water tank precompressed construction technology of claim 4, it is characterized in that: also be provided with to resist the upper and lower layer of water tank lateral pressure between described side wall (3) in length and breadth to pull bar (6,7); Describedly to pull bar back of the body a tree, used in making timber for boats, adopt chord member vertically to arrange in length and breadth, lower floor is close to bed die to pull bar (7) in length and breadth and lays, and upper strata is arranged in water tank top mouthful to pull bar (6) in length and breadth; With row, to the spacing between pull bar, it is 1.5 meters in length and breadth.
6. according to the described monolithic water tank precompressed construction technology of claim 5, it is characterized in that: described water tank bottom plate (2) is comprised of the first bamboo offset plate (23) of steel distribution beam (21), first lumps of wood (22) and the back cover laid on case beam framework (1) shellfish thunder sheet, described the first bamboo offset plate (23) is laid on steel distribution beam (21) and first lumps of wood (22) is upper, and described the first bamboo offset plate (23) thickness is 1.8cm.
7. according to the described monolithic water tank precompressed construction technology of claim 6, it is characterized in that: the side wall of described water tank surrounding (3) by with main bridge box beam bracket shellfish thunder sheet between the side wall shellfish thunder sheet that is connected, and with second lumps of wood (32) of steel wire lashing and the second bamboo offset plate (33) be fixed on second lumps of wood (32) by wooden peg, form between side wall shellfish thunder sheet, described side wall shellfish thunder sheet comprises two-layer upper strata Bei Lei sheet (34) and lower floor's shellfish thunder sheet (35) vertically is set, on described, lower floor's shellfish thunder sheet (34, 35) between, by fining twisted steel (31), with nut, be connected, described second lumps of wood (32) is by 30～150cm spacing lateral arrangement.
8. according to the described monolithic water tank precompressed construction technology of claim 7, it is characterized in that: described second lumps of wood (32) is of a size of 10 * 10cm, and the thickness of described the second bamboo offset plate (33) is 1.8cm.
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| CN103669228A (en) * | 2013-12-24 | 2014-03-26 | 中铁十九局集团第三工程有限公司 | Self-propelled movable mold frame pre-camber regulating device and regulating method thereof |
| CN103669228B (en) * | 2013-12-24 | 2016-08-24 | 中铁十九局集团第三工程有限公司 | Self-propelled moveable formwork camber method of adjustment |
| CN105527168A (en) * | 2014-09-28 | 2016-04-27 | 贵州中建建筑科研设计院有限公司 | Large-span open-web beam steel pipe full bracket pre-pressing test method and pressure test water tank thereof |
| CN105155425A (en) * | 2015-09-22 | 2015-12-16 | 深圳市市政工程总公司 | Fluid analogue simulation preloading construction method of full framing |
| CN105369738A (en) * | 2015-10-08 | 2016-03-02 | 武汉一冶建筑安装工程有限责任公司 | Prepressing method of flushing type bridge rubber raft |
| CN106400689A (en) * | 2016-09-13 | 2017-02-15 | 陈凯 | Sealed water bag prepressing construction technology |
| CN106948372A (en) * | 2017-04-14 | 2017-07-14 | 中建八局第建设有限公司 | A kind of passage precompressed construction technology |
| CN106948372B (en) * | 2017-04-14 | 2019-03-01 | 中建八局第一建设有限公司 | A kind of channel precompressed construction technology |
| CN109024285A (en) * | 2018-07-09 | 2018-12-18 | 贵州新联爆破工程集团有限公司 | A kind of continuous beam suspended bracket construction precompressed loading device |
| CN108978483A (en) * | 2018-08-23 | 2018-12-11 | 中交路桥建设有限公司 | Mix girder stayed-cable bridge concrete box girder steel pipe support joint preloading method |
| CN108978483B (en) * | 2018-08-23 | 2020-03-10 | 中交路桥建设有限公司 | Combined prepressing method for concrete box girder steel pipe support of hybrid beam cable-stayed bridge |
| CN109667227A (en) * | 2019-01-24 | 2019-04-23 | 中建新疆建工土木工程有限公司 | Overpass Cast-in-situ Beam strutting system water bag precompressed construction technology and its equipment |
| CN110080111A (en) * | 2019-04-19 | 2019-08-02 | 中国二十二冶集团有限公司 | Cast-in-Situ Box Girders pre-pressing bracket construction method |
| CN111172878A (en) * | 2019-12-31 | 2020-05-19 | 中铁十二局集团有限公司 | Intelligent preloading system for simulating construction load of arch bridge and construction method |
| CN111691450A (en) * | 2020-06-17 | 2020-09-22 | 无锡市航道工程有限公司 | Concrete construction process for top beam plate of high-pile beam plate type wharf |
| CN114047013A (en) * | 2021-11-17 | 2022-02-15 | 山东高速工程建设集团有限公司 | Pre-pressed water bag of viaduct cast-in-place beam support system and construction process thereof |
| CN114427220A (en) * | 2022-03-04 | 2022-05-03 | 中电建十一局工程有限公司 | Porous arch bridge water bag prepressing construction method |
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