CN113202029A - Construction method for protecting wet joint of bridge and bottom of cross diaphragm plate in upward crossing business line - Google Patents
Construction method for protecting wet joint of bridge and bottom of cross diaphragm plate in upward crossing business line Download PDFInfo
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- CN113202029A CN113202029A CN202110392398.8A CN202110392398A CN113202029A CN 113202029 A CN113202029 A CN 113202029A CN 202110392398 A CN202110392398 A CN 202110392398A CN 113202029 A CN113202029 A CN 113202029A
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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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Abstract
The invention relates to construction of a highway bridge of an upper-span railway trunk line, in particular to a construction method for protecting wet joints and midspan diaphragm plate pockets of an upper-span business line bridge. The technical problem that the lower railway line is easily interfered during the construction of the middle-crossing diaphragm plate in the existing over-span business line bridge construction is solved. The method comprises the steps of constructing a middle-span diaphragm plate and constructing a wet joint; the construction of the midspan diaphragm plate comprises the following steps: (1) installing a middle clapboard construction platform at the position where a middle transverse clapboard is needed to be poured at the wet joint of two adjacent box girders; (2) welding diaphragm connecting steel bars at the position of the diaphragm in the span to be poured and making a template support; (3) pouring concrete after the formwork support is finished; (4) the template removed is transferred to the top surface of the beam body from the gap of the wet joint; (5) channel steel, wood boards, steel wire meshes and tie bars of the construction platform for removing the middle partition boards are all transported to the top surface of the beam body through the gaps of the wet joints; and performing wet joint construction after the construction of the midspan diaphragm plate is finished.
Description
Technical Field
The invention relates to construction of a highway bridge of an upper-span railway trunk line, in particular to a construction method for protecting wet joints and midspan diaphragm plate pockets of an upper-span business line bridge.
Background
In the construction of wet joints and mid-span diaphragm plates of upper-span railway trunk highway bridges, the operation safety of a business line is guaranteed to be the heaviest, and meanwhile, the construction and railway transportation can be considered, the selection of a safe and reliable construction method is particularly important, the construction of the wet joints and mid-span diaphragm plates of the upper-span railway bridges is the most important, so that the stability and tightness of a template are guaranteed, slurry is prevented from leaking, the wet joints and the diaphragm plates of the bridges are cast in place as precast beam bodies, the beam bodies are connected into a whole, and the load stress of the beam bodies is enhanced; the wet joint and the midspan diaphragm plate are an important link of the construction quality of bridge engineering, and are also one of the links with complicated operation process and high construction difficulty, which are taken into consideration by people all the time.
The most important thing in the construction of the wet joint and the midspan diaphragm plate is to prevent sundries and cement in the construction from falling off to influence the normal operation of the railway trunk line. Therefore, the research on a construction method of the wet joint and the midspan diaphragm plate, which can effectively avoid the interference to the operation railway, is particularly urgent.
Disclosure of Invention
The invention provides a wet joint and midspan diaphragm pocket bottom protection construction method for an upper-span business line bridge, which aims to solve the technical problem that the construction of a midspan diaphragm is easy to interfere with a lower railway line in the construction of the existing upper-span business line bridge.
The invention is realized by adopting the following technical scheme: a construction method for protecting wet joints and bottoms of midspan diaphragm plates of bridges on an upper cross business line comprises midspan diaphragm plate construction and wet joint construction; the construction of the midspan diaphragm plate comprises the following steps: (1) installing a middle clapboard construction platform at the position of a cross diaphragm of a pouring span at a wet joint of two adjacent box girders, wherein the middle clapboard construction platform is reinforced by channel steel and lacing wires, the length of the platform along the direction of the box girder body is 3-3.1 m, the width of the channel steel is 20-25 cm wider than the lower part of the girder body, the upper part of the platform is provided with double rows of steel pipe cross rods and dovetail clamps as fixed ends of the lacing wires, a plurality of wood boards are laid on the platform, and iron wire meshes are hung on two sides of the platform to form a closed space; (2) welding diaphragm connecting steel bars at the position of the diaphragm in the span to be poured and making a template support; (3) pouring concrete after the formwork support is finished; (4) the template removed is transferred to the top surface of the beam body from the gap of the wet joint; (5) channel steel, wood boards, steel wire meshes and tie bars of the construction platform for removing the middle partition boards are all transported to the top surface of the beam body through the gaps of the wet joints;
and performing wet joint construction after the construction of the midspan diaphragm plate is finished.
According to the method, the middle partition plate construction platform is used as the bottom pocket platform, and the middle partition plate construction operation is carried out on the platform, so that the falling of concrete and other sundries in the middle partition plate construction is effectively prevented, the railway line in the operation below is effectively protected, and the safety of constructors is also protected. The middle clapboard construction platform is only adopted on part of box girders crossing railways according to specific situations.
Further, the wet joint construction comprises the following steps: (1) binding wet joint reinforcing steel bars; (2) mounting a wet joint bottom die and reinforcing the wet joint bottom die, manufacturing the bottom die by adopting square wood on the outer back of a bamboo plywood, and fixing the bottom die by the square wood positioned on the top surface of the box girder and a pull rod penetrating through the square wood and the bottom die; (3) pouring concrete; (4) after the design strength is reached, removing the formwork, reserving the formwork during formwork processing and reserving the formwork for removing the hoisting hole during concrete pouring, manufacturing a lifting rope by using a steel wire rope, penetrating through the hoisting hole, and fixing the steel wire rope on the top of the box girder during formwork installation; when the template is dismantled, the ropes and the lifting ropes which are long enough are connected firmly in advance, after the template and the concrete fall off, the template is placed under the beam by the ropes, and then the template is arranged outside the operation area.
The wet joint can prevent sundries from falling off by adopting the construction method, and particularly, the lifting rope is connected with the template, so that the template is effectively prevented from accidentally falling off.
Drawings
FIG. 1 is a flow chart of a construction process of a mid-span diaphragm plate.
FIG. 2 is a flow chart of a wet joint construction.
FIG. 3 is a schematic view of the construction of the mid-span diaphragm.
Fig. 4 is a sectional view taken along line a-a of fig. 3.
FIG. 5 is a schematic illustration of wet joint construction.
The steel bar is 1- ϕ 16mm, the wire mesh is 2-3-paving square timber, the channel steel is 4-16a (2.8 m long), the steel tube and the dovetail clamp are 5-double rows, the cross diaphragm is 6-midspan, the square timber is 7-100 mm (100 x 100 mm), the pull rod is 8-9-box girder, the bamboo plywood pocket bottom is 10-1.8cm thick, and the square timber is 11-50 x 50 for supporting.
Detailed Description
The applicant passes through organizational technology to the wet seam of the bridge of the business line of striding, stride the diaphragm plate in the middle to guarantee business line operation safety and construction quality as the goal, adopt channel-section steel and lacing wire to set up the pocket bottom platform in the diaphragm plate department of striding, wet seam department adopts bamboo plywood outer back square timber to make, the template is preserved when processing the template and concrete placement and is demolishd the hole for hoist. The method is implemented by crossing a Taizhong silver railway separation type overpass on a road at the border section of a G344 red temple, the bridge is arranged for crossing a Taizhong railway, the intersection angle of the central line of the railway and the central line of the railway is 65 degrees, a full bridge adopts a 1-connection (5 x 40m) assembled prestressed concrete combined box-shaped continuous beam bridge, the main span crossing the railway adopts 40m, and the total length of the bridge is 209.04 m. The construction method is formed by summarizing and arranging on the basis of ensuring the operation safety, quality and construction period of a business line through elaborate construction.
1 characteristics of the working method
1.1 safe and reliable
The middle-span diaphragm plate is made of channel steel and tie bars to build a pocket bottom platform, the wet joint is made of bamboo plywood outer back square wood, and the hoisting holes are removed by reserving the template during template processing and concrete pouring, so that the operation safety of a business line is guaranteed, and the operation safety of operators is also guaranteed.
1.2 simple operation
The method is simple and convenient in operation of wet joints and cross-middle diaphragm plates, does not need special construction mechanical equipment, and does not need to invest special funds to purchase special construction equipment.
2 scope of application
The construction method for the wet joint of the bridge on the upper crossing business line and the bottom of the cross diaphragm is suitable for the construction of the wet joint of the bridge on the upper crossing business line and the cross diaphragm.
3 principle of the process
The middle cross partition plate is provided with a pocket bottom platform which is built by channel steel and tie bars, the middle partition plate construction platform is reinforced by the channel steel and the tie bars, the length of the platform is 3m along the direction of the beam body, the width of the channel steel is 20cm larger than the lower part of the beam body, the upper part of the platform is provided with double rows of steel pipe cross rods and dovetail clamps which are used as fixed ends of the tie bars, the platform is provided with a board which is 30cm wide and 5cm thick, and iron wire nets are hung on two sides of the platform to form a closed space. The wet joint is made of square wood outside the bamboo plywood, and the hoisting holes are reserved during template processing and during concrete pouring. The operation safety of a business line and the construction quality of a wet joint and a diaphragm plate are ensured.
4 construction process flow and operation method
4.1 Process flow
Fig. 1 is a flow chart of the construction of a midspan diaphragm, and fig. 2 is a flow chart of the construction of a wet joint.
4.2 construction Process and method
4.2.1 midspan diaphragm plate construction process and method
As shown in fig. 3 and 4, 2 pieces of 16a channel steel and 4 pieces of phi 16 tie bars are adopted to reinforce the median septum construction platform, the platform is 3m long along the beam body direction, the width of the channel steel is 20cm wider than the lower part of the beam body, the upper part of the platform is provided with double rows of steel pipe cross rods and dovetail clamps as fixed ends of the tie bars, the platform is paved with boards 30cm wide and 5cm thick, and iron wire nets are hung on two sides of the platform to form a closed space.
Two workers work on each diaphragm plate of the template, the workers perform reinforcement and template support on two sides of the diaphragm plate, the end mold of the diaphragm plate adopts a bamboo plywood with the thickness of 1cm as a panel, a wood board with the thickness of 3cm as a reinforcing back rib, four side molds and four bottom molds. The width of the bottom die is 4cm larger than the size of the diaphragm plate of the cast-in-place part, during reinforcement, a bottom-wrapping side form is formed to prevent slurry leakage, the bottom die of the lower diaphragm plate is erected on the inclined plane of the beam rib, the bottom die of the upper diaphragm plate is erected on the lower diaphragm plate by adopting square wood, and the dies on two sides are fixed by adopting butterfly clamps and a lead screw with the diameter of 8 mm.
When the template is dismantled, the bolts of tie bars of the side die of the diaphragm plate are loosened, and the template is slightly pried by two persons in cooperation with one person, and the template is held by one person. When the bottom die is detached, the transverse rib below the bottom die is detached, the template is slightly knocked, the template is slowly detached, and the detached template is transported to the top surface of the beam body from the wet joint gap.
4.2.2 Wet joint construction process and method
As shown in figure 5, the bamboo plywood outer back square wood is adopted for manufacturing, the formwork support is firm and reliable, the formwork is installed by a small-sized winch in manual fit, the abutted seams of the formwork and the abutted surface of concrete are checked after the formwork is installed, loose parts are blocked by foam rubber, and slurry leakage is strictly avoided.
Removing the template: reserving a template during template processing and reserving a template during concrete pouring, dismantling a hoisting hole, manufacturing a hoisting rope by using a steel wire rope with the diameter of 5mm, and fixing the hoisting rope with a beam top during template installation; when the template is dismantled, a rope which is prepared to be long enough is firmly connected with the lifting rope in advance, after the template and concrete fall off, the rope is slowly placed under the beam, and a specially-assigned person arranges the concrete outside an operation area.
4.2.3 casting concrete
Concrete is intensively mixed by adopting a mixing station, the concrete tank truck is transported to the site, the pouring is carried out according to the sequence of inside to outside and bottom to top, the concrete extends down from the un-poured bridge deck to the upper opening of the diaphragm plate through the string barrel, and a specially-assigned person is required to command the pouring quantity every time to inching so as to prevent excessive concrete from overflowing to a business line below. The concrete is poured by a small vibrating rod, the vibrating equipment is tied down from the top of the beam, the bottom diaphragm plate is vibrated by a vibrator standing on an operation platform, and the top diaphragm plate is vibrated by the vibrator standing on the top of the beam.
5 main machinery, test, inspection instrument and equipment
6 quality control
6.1 strict rules of 'test data guide construction' select machines and tools, raw materials, concrete mixing ratio and operation methods through indoor and outdoor tests, correct related construction technical parameters, formulate process flow, and use operation guide books and acceptance standards as control bases of comprehensive construction.
6.2 concrete quality control, when the concrete is mixed, the concrete is strictly mixed according to the mixing proportion, the water content test is carried out on sand and stone, the construction mixing proportion is preferably controlled, special personnel carry out preliminary detection before leaving the station on the mixed finished product, unqualified concrete is not allowed to leave the station, the concrete is transported to the site by adopting a concrete transport vehicle, the concrete transported to the site is used for slump test, and the unqualified concrete is not allowed to be used.
6.3 the template must be made according to the technical requirements and the technical dimensions strictly, the allowable deviation of the making must not exceed the design range, special personnel can check the template made into the finished product, and unqualified template is never allowed to go to the scene.
6.4 before erecting the mould, cleaning the surface of the mould plate and coating a release agent.
6.5 when pouring concrete, a special person checks the model, and if the concrete is deformed, the model is reinforced in time.
6.6 in the construction process, technicians and quality inspectors can be guaranteed to be on site, and knowledge and inspection can be carried out in the construction process at any time.
6.7 before pouring, sundries, virtual slag and the like should be cleaned.
6.8, removing the template and curing the concrete, wherein the outer side of the template is slightly knocked when the template is removed, the template is gradually separated from the concrete surface, the template is moved to be removed, the removed template is stacked orderly, derusting, polishing and oil brushing are carried out for later use, and the concrete surface is coated with a concrete curing agent for curing immediately after the template is removed.
7 safety measures
7.1 constructors must be trained to know and master the construction operation content and improve the safety protection consciousness; in operation, attention is focused. Enough sleep is needed, the user does not doze during work, and construction work after drinking is forbidden; the safety helmet and the safety belt are tied when working aloft.
7.2 personnel entering the scene must wear safety helmets to prevent people from being injured by falling objects.
7.3 Wet seam, diaphragm plate rebar welding operations must be done within the containment point. The welding worker must be the skilled operating personnel who proves, and the operation basket that personnel used must weld firmly, sturdy and firm to can personnel use behind the weight-bearing test. The diaphragm operating personnel must wear the safety belt and be connected with the reliable part of the beam body.
7.4 the label of the electric appliance is provided with a grounding device and adopts protection facilities such as one machine, one brake, one leakage and one box.
7.5 during the installation or demolition construction of the template, a safety rope must be arranged to prevent the template from falling into the railway range carelessly.
7.6 when severe weather such as strong wind occurs, the construction should be stopped, and the construction steel bars, the templates, the tools and the like on the bridge deck are moved to the places outside the railway crossing to be classified and stacked.
8 environmental protection measures
8.1 temporary works and site layout should take measures to protect the natural environment.
8.2 the waste in the production is processed in time and transported to the place appointed by the local environmental protection department for disposal.
8.3 according to the requirements of environmental protection departments, the sewage and the wastewater generated in production and life are treated in a centralized way.
And 8.4, the construction site realizes civilized construction and reduces dust. The dust is reduced by wine in the toilet at regular intervals, and the flying of dust is reduced.
8.5 a material recycling department which can store the construction wastes in a centralized way and recycle the construction wastes. Other non-recyclable wastes are deeply buried or abandoned at designated places.
8.6 the maintenance of the used engineering machinery and transport vehicles is enhanced, and the noise is reduced as much as possible.
8.7, the method adheres to civilized construction, promotes the standardization and normalization of field management and construction operation, and avoids the phenomenon of brutal construction. The construction road is frequently sprinkled with water to prevent dust pollution; the fuel oil material is stored in a centralized way, so that the fuel oil material is properly managed and the environment pollution is prevented.
9 benefit analysis
9.1 construction safety and reliability, set up the operation safety of pocket bottom template and strutted both assurance business line and assurance operation personnel's operation safety.
9.2, the operation of the working procedure is simple and convenient, the operation of constructing the wet joint and the diaphragm plate by adopting the method is simple and convenient, and special construction mechanical equipment is not needed.
9.3, the cost is saved, and the mechanical cost and the labor cost are saved by 5 ten thousand yuan compared with the conventional construction method for constructing the wet joint and the midspan diaphragm plate by adopting the method.
10 examples of applications
G344 red temple border section highway is striden taizhong silver railway disconnect-type overpass engineering on: the bridge is arranged for crossing over the Taizhong railway, the mileage of an intersection point is K6+778 (public) = K1615+517 (iron), and the intersection angle of a central line of the highway and the central line of the railway is 65 degrees. The full bridge adopts a 1-unit (5 multiplied by 40m) assembled prestressed concrete combined box-shaped continuous beam bridge, wherein the main span crossing a railway adopts 40m, the total length of the bridge is 209.04 m, the bridge is positioned on a straight line, abutments are arranged in a radial direction, and the skew is set at 25 degrees. The construction method is adopted to start construction in 9 months in 2020, so that the safety, quality and benefit are ensured, and the favorable comment of companies is gained.
Claims (6)
1. A wet joint and midspan diaphragm plate bottom protection construction method for an upper-span business line bridge is characterized by comprising midspan diaphragm plate construction and wet joint construction; the construction of the midspan diaphragm plate comprises the following steps: (1) installing a middle clapboard construction platform at the position of a cross diaphragm of a pouring span at a wet joint of two adjacent box girders, wherein the middle clapboard construction platform is reinforced by channel steel and lacing wires, the length of the platform along the direction of the box girder body is 3-3.1 m, the width of the channel steel is 20-25 cm wider than the lower part of the girder body, the upper part of the platform is provided with double rows of steel pipe cross rods and dovetail clamps as fixed ends of the lacing wires, a plurality of wood boards are laid on the platform, and iron wire meshes are hung on two sides of the platform to form a closed space; (2) welding diaphragm connecting steel bars at the position of the diaphragm in the span to be poured and making a template support; (3) pouring concrete after the formwork support is finished; (4) the template removed is transferred to the top surface of the beam body from the gap of the wet joint; (5) channel steel, wood boards, steel wire meshes and tie bars of the construction platform for removing the middle partition boards are all transported to the top surface of the beam body through the gaps of the wet joints;
and performing wet joint construction after the construction of the midspan diaphragm plate is finished.
2. The method for constructing wet joint and mid-span diaphragm plate pocket bottom protection of the over-the-business line bridge according to claim 1, wherein the wet joint construction comprises the following steps: (1) binding wet joint reinforcing steel bars; (2) mounting a wet joint bottom die and reinforcing the wet joint bottom die, manufacturing the bottom die by adopting square wood on the outer back of a bamboo plywood, and fixing the bottom die by the square wood positioned on the top surface of the box girder and a pull rod penetrating through the square wood and the bottom die; (3) pouring concrete; (4) after the design strength is reached, removing the formwork, reserving the formwork during formwork processing and reserving the formwork for removing the hoisting hole during concrete pouring, manufacturing a lifting rope by using a steel wire rope, penetrating through the hoisting hole, and fixing the steel wire rope on the top of the box girder during formwork installation; when the template is dismantled, the ropes and the lifting ropes which are long enough are connected firmly in advance, after the template and the concrete fall off, the template is placed under the beam by the ropes, and then the template is arranged outside the operation area.
3. The wet joint and mid-span diaphragm plate bottom-pocket protection construction method of the upper-span business line bridge, according to claim 1 or 2, is characterized in that a mid-span diaphragm plate construction platform is reinforced by 2 pieces of 16a channel steel and 4 pieces of tie bars with the diameter of 16 phi, the platform is 3m long along the direction of the beam body, the width of the channel steel is 20cm wider than the lower part of the beam body, and a plurality of boards with the width of 30cm and the thickness of 5cm are laid on the platform.
4. The construction method for protecting the wet joint of the bridge across the business line and the pocket bottom of the cross partition board across the middle of the upper cross of the business line as claimed in claim 1 or 2, wherein the end mould of the cross partition board across the middle adopts a bamboo plywood with the thickness of 1cm as a panel, a wood board with the thickness of 3cm as a reinforcing back rib, four side moulds and four bottom moulds; the width of the bottom die is 4cm larger than the size of the diaphragm plate of the cast-in-place part, the bottom die is reinforced by taking care of forming a bottom-wrapping side form to prevent slurry leakage, the bottom die of the lower diaphragm plate is erected on the inclined plane of the beam rib, the bottom die of the upper diaphragm plate is erected on the lower diaphragm plate by adopting square wood, and the dies on two sides are fixed by adopting butterfly cards and a lead screw with the diameter of 8 mm;
when the template of the midspan diaphragm plate is removed, firstly loosening bolts of tie bars of the side die of the diaphragm plate so as to pry the template and hold the template at one side; when the bottom die is disassembled, the transverse rib below the bottom die is disassembled, the template is knocked, the template is disassembled, and the disassembled template is transported to the top surface of the beam body from the gap of the wet joint.
5. The wet joint and midspan diaphragm plate bottom protection construction method of an upper-span business line bridge according to claim 1 or 2, characterized in that concrete pouring in midspan diaphragm plate construction is performed according to the sequence of inside to outside and bottom to top, concrete extends from a non-poured bridge deck plate to an upper opening of the diaphragm plate through a string tube, and the pouring amount is required to prevent excessive concrete from overflowing to a lower business line each time; the concrete is poured by a small vibrating rod, the vibrating equipment is tied down from the top of the beam, the bottom diaphragm plate is vibrated by a vibrator standing on an operation platform, and the top diaphragm plate is vibrated by the vibrator standing on the top of the beam.
6. The construction method for wet joint and bottom protection of midspan diaphragm plate of upper cross business line bridge as claimed in claim 2, wherein the form in midspan diaphragm plate construction and wet joint construction is installed and removed by arranging safety rope on the form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392398.8A CN113202029A (en) | 2021-04-13 | 2021-04-13 | Construction method for protecting wet joint of bridge and bottom of cross diaphragm plate in upward crossing business line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392398.8A CN113202029A (en) | 2021-04-13 | 2021-04-13 | Construction method for protecting wet joint of bridge and bottom of cross diaphragm plate in upward crossing business line |
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| CN113202029A true CN113202029A (en) | 2021-08-03 |
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| CN202110392398.8A Pending CN113202029A (en) | 2021-04-13 | 2021-04-13 | Construction method for protecting wet joint of bridge and bottom of cross diaphragm plate in upward crossing business line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114714491A (en) * | 2022-04-14 | 2022-07-08 | 中交第四公路工程局有限公司 | Heat storage and preservation device for bridge diaphragm concrete and use method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6345403B1 (en) * | 1995-05-08 | 2002-02-12 | Schuylkill Products, Inc. | Method of bridge construction using concrete diaphragms |
| CN103758045A (en) * | 2014-02-20 | 2014-04-30 | 中铁十局集团第三建设有限公司 | Box girder wet joint formwork construction method under space limitation condition |
| CN105155428A (en) * | 2015-10-26 | 2015-12-16 | 杭州江润科技有限公司 | Operating-railway-crossing construction method for large assembly-type prestress concrete continuous T beam |
| WO2016023462A1 (en) * | 2014-08-15 | 2016-02-18 | 中交第二航务工程局有限公司 | Glued joint connecting method for steel-concrete composite beam of cable-stayed bridge |
| CN206052560U (en) * | 2016-08-27 | 2017-03-29 | 中国建筑第六工程局有限公司 | A kind of protection hanging canopy for bridge span construction of the highway |
| CN207419227U (en) * | 2017-11-17 | 2018-05-29 | 中铁六局集团有限公司 | Railway simply supported beam diaphragm plate and wet seam simple and fast constructing device |
| CN207685681U (en) * | 2017-12-11 | 2018-08-03 | 中铁二十三局集团第一工程有限公司 | Precast beam cross-connecting apparatus |
| CN210658013U (en) * | 2019-05-14 | 2020-06-02 | 中铁第四勘察设计院集团有限公司 | Hanging basket structure for construction of wet joints of prefabricated erected small box girder cross-line bridge |
-
2021
- 2021-04-13 CN CN202110392398.8A patent/CN113202029A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6345403B1 (en) * | 1995-05-08 | 2002-02-12 | Schuylkill Products, Inc. | Method of bridge construction using concrete diaphragms |
| CN103758045A (en) * | 2014-02-20 | 2014-04-30 | 中铁十局集团第三建设有限公司 | Box girder wet joint formwork construction method under space limitation condition |
| WO2016023462A1 (en) * | 2014-08-15 | 2016-02-18 | 中交第二航务工程局有限公司 | Glued joint connecting method for steel-concrete composite beam of cable-stayed bridge |
| CN105155428A (en) * | 2015-10-26 | 2015-12-16 | 杭州江润科技有限公司 | Operating-railway-crossing construction method for large assembly-type prestress concrete continuous T beam |
| CN206052560U (en) * | 2016-08-27 | 2017-03-29 | 中国建筑第六工程局有限公司 | A kind of protection hanging canopy for bridge span construction of the highway |
| CN207419227U (en) * | 2017-11-17 | 2018-05-29 | 中铁六局集团有限公司 | Railway simply supported beam diaphragm plate and wet seam simple and fast constructing device |
| CN207685681U (en) * | 2017-12-11 | 2018-08-03 | 中铁二十三局集团第一工程有限公司 | Precast beam cross-connecting apparatus |
| CN210658013U (en) * | 2019-05-14 | 2020-06-02 | 中铁第四勘察设计院集团有限公司 | Hanging basket structure for construction of wet joints of prefabricated erected small box girder cross-line bridge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114714491A (en) * | 2022-04-14 | 2022-07-08 | 中交第四公路工程局有限公司 | Heat storage and preservation device for bridge diaphragm concrete and use method |
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Application publication date: 20210803 |