CN114808765A - Construction method for transversely reinforcing existing railway bridge simply-supported double T-shaped beams - Google Patents
Construction method for transversely reinforcing existing railway bridge simply-supported double T-shaped beams Download PDFInfo
- Publication number
- CN114808765A CN114808765A CN202210502399.8A CN202210502399A CN114808765A CN 114808765 A CN114808765 A CN 114808765A CN 202210502399 A CN202210502399 A CN 202210502399A CN 114808765 A CN114808765 A CN 114808765A
- Authority
- CN
- China
- Prior art keywords
- hole
- steel
- concrete
- drilling
- prestressed
- 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
- 238000010276 construction Methods 0.000 title claims abstract description 46
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 116
- 239000010959 steel Substances 0.000 claims abstract description 116
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000002513 implantation Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 51
- 238000007789 sealing Methods 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 9
- 210000002435 tendon Anatomy 0.000 claims description 6
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000011513 prestressed concrete Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a construction method for transversely reinforcing a simply supported double T-shaped beam of an existing railway bridge, which comprises the following steps of: s1 scaffold erection: erecting a construction platform by using a full-length working scaffold at the lower part of the beam body; s2 steel bar detection and positioning drilling: marking out longitudinal and transverse lines on the plane position of the embedded bar by using ink lines or a ruler, taking the intersection point of the longitudinal and transverse lines as the embedded bar position, detecting the position of the reinforcing bar in the structure, and then drilling by using an electric hammer; s3 cleaning the hole wall and implanting steel bars: after drilling, checking the hole depth and the hole diameter, blowing out dust in the hole by using an air compressor after the hole depth and the hole diameter are qualified, then cleaning the hole by using clear water, blowing the hole by using compressed air again after cleaning, repeatedly performing 3-5 times until no dust chips exist in the hole, then waiting for drying, temporarily closing the hole opening after drying, then implanting the treated steel bar into the hole, and injecting structural adhesive into the hole after the implantation is finished; the method has the characteristics of simple process, less single-hole reinforcing work amount and high construction speed.
Description
Technical Field
The invention relates to the technical field of railway construction, in particular to a construction method for transversely reinforcing a simply supported double T-shaped beam of an existing railway bridge.
Background
With the continuous improvement of the operation speed of railway trains in China, the railway T-beam bridge constructed in the seventies of the last century cannot meet the requirement of high-speed operation, is newly built after being dismantled, has huge cost, and can also have certain influence on the existing railway line operation due to long construction period, so that the existing railway bridge simply-supported double-T-beam transverse reinforcing construction method is provided.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides the existing railway bridge simply-supported double-T-beam transverse reinforcement construction method, has the characteristics of simple process, less single-hole reinforcement engineering quantity and high construction speed, and can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the construction method for transversely reinforcing the simply supported double T-shaped beams of the existing railway bridge comprises the following steps:
s1 scaffold erection: erecting a construction platform by using a full-length working scaffold at the lower part of the beam body;
s2 steel bar detection and positioning drilling: marking out longitudinal and transverse lines on the plane position of the embedded steel bars by using ink lines or straight rulers, taking the intersection points of the longitudinal and transverse lines as the embedded steel bar positions, detecting the positions of the steel bars in the structure, and then drilling by using an electric hammer;
s3 cleaning the hole wall and implanting steel bars: after drilling, checking the hole depth and the hole diameter, blowing out dust in the hole by using an air compressor after the hole depth and the hole diameter are qualified, then cleaning the hole by using clear water, blowing the hole by using compressed air again after cleaning, repeatedly performing 3-5 times until no dust chips exist in the hole, then waiting for drying, temporarily closing the hole opening after drying, then implanting the treated steel bar into the hole, and injecting structural adhesive into the hole after the implantation is finished;
s4 interface processing, wherein a small electric tool is adopted to manually roughen the concrete surface of the original structure, and the area range is the same as the detection range of the steel bars;
s5 binding steel bars: selecting steel bars with clean and straight surfaces and no local bending for bending and processing, and binding and connecting the processed steel bars with the embedded steel bars of the beam body on site;
s6 manufacturing and installing of unbonded prestressed stranded wires: the method comprises the following steps of blanking steel strands according to the length required by a drawing, cutting the steel bars by using a toothless saw, installing prestressed steel strands according to the position of a drilled prestressed duct according to a construction drawing after cutting, welding steel strand supporting stirrups on the structural steel bars, ensuring the accurate position of the steel strands, installing a tensioning end anchorage and a fixed end anchorage, manually pulling the steel strands tightly, and fixing by using a clamping piece to prevent the position of the steel strands from being influenced in the concrete pouring process;
s7, opening the beam body pouring hole and installing the bottom template: the pouring port is arranged between the added horizontal connecting plate and the bridge surface beam gap above the thickened vertical transverse shelf, each plate is provided with 2 pore channels, a 10CM square mould is processed by a template, and then the template is laid from one end of the beam body to the other end by adopting the form of a steel pipe bracket and a wood template;
s8 concrete pouring: the super-flow early-strength concrete is adopted for pouring, during construction, a mold, a concrete material and the like which are made in advance are lifted to a bridge floor by an electric winch, the mold is clamped, the concrete starts to flow in from a pouring opening until the concrete overflows from another hole, the concrete is proved to be filled, and then the next concrete pouring is started;
s9 stretching of the unbonded prestressed steel strand: before the unbonded prestressed steel strand is tensioned, the front end cuts off the outer skin of the unbonded prestressed steel strand, a single-hole anchor is sleeved on the outer skin of the unbonded prestressed steel strand, the outer skin of the unbonded prestressed steel strand cannot enter the clamping sheet, the wire sliding is prevented, and the tensioning force is determined according to the requirements of a construction drawing: calculating a theoretical elongation value delta L of the unbonded prestressed steel strand as PL/EPAP according to specifications, wherein the allowable deviation of the actual elongation value of the unbonded prestressed steel strand and the theoretical elongation value is +/-6%, the tensioning is performed by one-time tensioning, the stress is controlled to be 0 → Sigma con, the tensioning sequence of prestressed tendons is required to follow the symmetrical tensioning principle, and detailed records are made on the tensioning force, the reading of a pressure gauge, the tensioning elongation value, abnormal phenomena and the like during the prestressed tensioning;
s10 anchor sealing: and (4) cutting off the redundant prestressed tendons by using a grinder before sealing the anchor, and then sealing the anchor by using anchor sealing concrete.
As a preferred technical scheme of the invention, the drilling in the step 2 is divided into two types, wherein the prestressed steel strand channel hole needs to be drilled through the beam body, the bar planting hole is arranged, the drilling depth and the diameter are carried out according to the specifications of different steel bar diameters, the drilling process needs to ensure that the hole is vertical to the plane of the concrete member, the existing longitudinal prestressed steel bar or longitudinal main steel bar is strictly prevented from being damaged by drilling, the existing common steel bar is prevented from being damaged as much as possible, if the hole position can not avoid the steel bar, the drilling position can be properly adjusted, and the moving distance is not more than 50 mm.
As a preferred technical scheme of the invention, in the step 3, the steel bars are protected after being implanted and positioned, so that collision and displacement are prevented, the steel bars are kept for 24 hours, and the steel bars can be stressed after the structural adhesive is cured.
As a preferred technical scheme of the invention, in the step 5, the bending of the reinforcing steel bars and the hook of the tail section meet the design requirements, the tail section of the bent reinforcing steel bar adopts a right-angle-shaped hook, the length of a straight line section of a hook end is not less than 3d, the bending diameter of a straight structure is not less than 5d, the bent reinforcing steel bar of the design drawing part is in a curve shape, the bent reinforcing steel bar is bent into a smooth curve during construction, the curvature radius of the curve is not less than 12 times of the diameter of the reinforcing steel bar, the field is bound and connected with the embedded reinforcing steel bars of the beam body, the binding length is not less than 35d, and the number of joints in the same section is not more than 50%.
As a preferred technical scheme of the invention, when the concrete pouring is influenced by the small beam gap in the step 7, the edges of the ballast groove can be properly chiseled.
As a preferred technical scheme of the invention, the concrete of the prestressed concrete slab in the step 8 construction needs to be continuously poured once, and no construction joint is left.
As a preferred technical scheme of the invention, in the step 10, the anchor sealing concrete is fine aggregate concrete micro-expansion concrete with the same strength grade as the member.
Compared with the prior art, the invention has the beneficial effects that: according to the construction method, the movable scaffold is adopted for the template support, the superfluid early strength concrete is adopted for the concrete, the flow process is formed, the time for building full scaffold and waiting for tensioning the concrete in the traditional method is saved, the skylight time of railway transportation is also reduced, the construction progress is accelerated, the construction cost is reduced, the guarantee is provided for the driving safety of the railway, and the construction method has effective economy and operability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a technical scheme: the construction method for transversely reinforcing the simply supported double T-shaped beams of the existing railway bridge comprises the following steps:
s1 scaffold erection: erecting a construction platform by using a full-length working scaffold at the lower part of the beam body;
s2 steel bar detection and positioning drilling: marking out longitudinal and transverse lines on the plane position of the embedded steel bars by using ink lines or straight rulers, taking the intersection points of the longitudinal and transverse lines as the embedded steel bar positions, detecting the positions of the steel bars in the structure, and then drilling by using an electric hammer;
s3 cleaning the hole wall and implanting steel bars: after drilling, checking the hole depth and the hole diameter, blowing out dust in the hole by using an air compressor after the hole depth and the hole diameter are qualified, then cleaning the hole by using clear water, blowing the hole by using compressed air again after cleaning, repeatedly performing 3-5 times until no dust chips exist in the hole, then waiting for drying, temporarily closing the hole opening after drying, then implanting the treated steel bar into the hole, and injecting structural adhesive into the hole after the implantation is finished;
s4 interface processing, wherein a small electric tool is adopted to manually roughen the concrete surface of the original structure, and the area range is the same as the detection range of the steel bars;
s5 binding steel bars: selecting steel bars with clean and straight surfaces and no local bending for bending and processing, and binding and connecting the processed steel bars with the embedded steel bars of the beam body on site;
s6 manufacturing and installing of unbonded prestressed stranded wires: the method comprises the following steps of blanking steel strands according to the length required by a drawing, cutting the steel bars by using a toothless saw, installing prestressed steel strands according to the position of a drilled prestressed duct according to a construction drawing after cutting, welding steel strand supporting stirrups on the structural steel bars, ensuring the accurate position of the steel strands, installing a tensioning end anchorage and a fixed end anchorage, manually pulling the steel strands tightly, and fixing by using a clamping piece to prevent the position of the steel strands from being influenced in the concrete pouring process;
s7, opening the beam body pouring hole and installing the bottom template: the pouring port is arranged between the added horizontal connecting plate and the bridge surface beam gap above the thickened vertical transverse shelf, each plate is provided with 2 pore channels, a 10CM square mould is processed by a template, and then the template is laid from one end of the beam body to the other end by adopting the form of a steel pipe bracket and a wood template;
s8 concrete pouring: the super-flow early-strength concrete is adopted for pouring, during construction, a mold, a concrete material and the like which are made in advance are lifted to a bridge floor by an electric winch, the mold is clamped, the concrete starts to flow in from a pouring opening until the concrete overflows from another hole, the concrete is proved to be filled, and then the next concrete pouring is started;
s9 stretching of the unbonded prestressed steel strand: before the unbonded prestressed steel strand is tensioned, the front end cuts off the outer skin of the unbonded prestressed steel strand, a single-hole anchor is sleeved on the outer skin of the unbonded prestressed steel strand, the outer skin of the unbonded prestressed steel strand cannot enter the clamping sheet, the wire sliding is prevented, and the tensioning force is determined according to the requirements of a construction drawing: calculating a theoretical elongation value delta L of the unbonded prestressed steel strand as PL/EPAP according to specifications, wherein the allowable deviation of the actual elongation value of the unbonded prestressed steel strand and the theoretical elongation value is +/-6%, the tensioning is performed by one-time tensioning, the stress is controlled to be 0 → Sigma con, the tensioning sequence of prestressed tendons is required to follow the symmetrical tensioning principle, and detailed records are made on the tensioning force, the reading of a pressure gauge, the tensioning elongation value, abnormal phenomena and the like during the prestressed tensioning;
s10 anchor sealing: and (4) cutting off the redundant prestressed tendons by using a grinder before sealing the anchor, and then sealing the anchor by using anchor sealing concrete.
Wherein: and 2, drilling holes in the step 2 are divided into two types, namely a prestressed steel strand channel hole, a beam body needs to be drilled through, a bar planting hole, the drilling depth and the diameter are performed according to different steel bar diameters, the vertical concrete member plane is ensured in the drilling process, the existing longitudinal prestressed steel bar or the longitudinal main bar is strictly prevented from being damaged by the drilling, the existing common steel bar is prevented from being damaged as much as possible, if the steel bar cannot be avoided by the hole position, the drilling position can be properly adjusted, and the moving distance is not more than 50 mm.
Wherein: and 3, protecting the steel bars after the steel bars are implanted and positioned, preventing collision and displacement, keeping for 24 hours, and bearing after the structural adhesive is cured.
Wherein: in the step 5, bending of the steel bar and the hook of the tail section meet the design requirements, the tail section of the bent steel bar adopts a right-angle-shaped hook, the length of a straight line section of a hook end is not less than 3d, the bending diameter of a straight structure is not less than 5d, the bent steel bar of the part of the design drawing is in a curve shape, the bent steel bar is bent into a smooth curve during construction, the curvature radius of the bent steel bar is not less than 12 times of the diameter of the steel bar, binding connection is adopted between a field and a beam body for bar planting, the binding length is not less than 35d, and the number of joints in the same section is not more than 50%.
Wherein: and 7, when the concrete pouring is influenced by the undersize beam gaps, properly chiseling the edges of the ballast grooves.
Wherein: and 8, completing the concrete of the prestressed concrete slab in the construction in the step 8 by one-time continuous pouring, wherein construction joints cannot be reserved.
Wherein: in the step 10, the anchor sealing concrete adopts the fine aggregate concrete micro-expansion concrete with the same strength grade as the member
The invention relates to a construction method for integrally and transversely reinforcing two or more T-shaped beams with a single hole, which is inherently different from the traditional single-piece beam body.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The existing railway bridge simply-supported double-T beam transverse reinforcing construction method is characterized by comprising the following steps:
s1 scaffold erection: erecting a construction platform by using a full-length working scaffold at the lower part of the beam body;
s2 steel bar detection and positioning drilling: marking out longitudinal and transverse lines on the plane position of the embedded steel bars by using ink lines or straight rulers, taking the intersection points of the longitudinal and transverse lines as the embedded steel bar positions, detecting the positions of the steel bars in the structure, and then drilling by using an electric hammer;
s3, cleaning hole walls and implanting steel bars: after drilling, checking the hole depth and the hole diameter, blowing out dust in the hole by using an air compressor after the hole depth and the hole diameter are qualified, then cleaning the hole by using clear water, blowing the hole by using compressed air again, repeating the operation for 3-5 times until no dust chips exist in the hole, waiting for the drying of the dust chips, temporarily closing the hole opening after the drying, then implanting the treated steel bar into the hole, and injecting structural adhesive into the hole after the implantation is finished;
s4 interface processing, wherein a small electric tool is adopted to manually roughen the concrete surface of the original structure, and the area range is the same as the detection range of the steel bars;
s5 binding steel bars: selecting steel bars with clean and straight surfaces and no local bending for bending and processing, and binding and connecting the processed steel bars with the embedded steel bars of the beam body on site;
s6 manufacturing and installing of unbonded prestressed stranded wires: the method comprises the following steps of blanking steel strands according to the length required by a drawing, cutting the steel bars by using a toothless saw, installing prestressed steel strands according to the position of a drilled prestressed duct according to a construction drawing after cutting, welding steel strand supporting stirrups on the structural steel bars, ensuring the accurate position of the steel strands, installing a tensioning end anchorage and a fixed end anchorage, manually pulling the steel strands tightly, and fixing by using a clamping piece to prevent the position of the steel strands from being influenced in the concrete pouring process;
s7, opening the beam body pouring hole and installing the bottom template: the pouring port is arranged between the added horizontal connecting plate and the bridge surface beam gap above the thickened vertical transverse shelf, each plate is provided with 2 pore channels, a 10 CM/10 CM square mould is processed by a template, and then the template is laid from one end of the beam body to the other end by adopting a form of a steel pipe bracket and a wood template;
s8 concrete pouring: the super-flow early-strength concrete is adopted for pouring, during construction, a mold, concrete materials and the like which are made in advance are lifted to a bridge floor by an electric winch, the mold is clamped, the concrete starts to flow in from a pouring opening, the concrete overflows from another hole, the concrete is proved to be filled, and then the next concrete is poured;
s9 stretching of the unbonded prestressed steel strand: before the unbonded prestressed steel strand is tensioned, the front end cuts off the outer skin of the unbonded prestressed steel strand, a single-hole anchor is sleeved on the outer skin of the unbonded prestressed steel strand, the outer skin of the unbonded prestressed steel strand cannot enter the clamping sheet, the wire sliding is prevented, and the tensioning force is determined according to the requirements of a construction drawing: calculating a theoretical elongation value delta L of the unbonded prestressed steel strand as PL/EPAP according to specifications, wherein the allowable deviation of the actual elongation value of the unbonded prestressed steel strand and the theoretical elongation value is +/-6%, the tensioning is performed by one-time tensioning, the stress is controlled to be 0 → Sigma con, the tensioning sequence of prestressed tendons is required to follow the symmetrical tensioning principle, and detailed records are made on the tensioning force, the reading of a pressure gauge, the tensioning elongation value, abnormal phenomena and the like during the prestressed tensioning;
s10 anchor sealing: and (4) cutting off the redundant prestressed tendons by using a grinder before sealing the anchor, and then sealing the anchor by using anchor sealing concrete.
2. The existing railway bridge simply-supported double-T beam transverse reinforcing construction method as claimed in claim 1, which is characterized in that: and 2, drilling holes in the step 2 are divided into two types, namely a prestressed steel strand channel hole, a beam body needs to be drilled through, a bar planting hole, the drilling depth and the diameter are performed according to different steel bar diameters, the vertical concrete member plane is ensured in the drilling process, the existing longitudinal prestressed steel bar or the longitudinal main bar is strictly prevented from being damaged by the drilling, the existing common steel bar is prevented from being damaged as much as possible, if the steel bar cannot be avoided by the hole position, the drilling position can be properly adjusted, and the moving distance is not more than 50 mm.
3. The existing railway bridge simply-supported double-T beam transverse reinforcing construction method as claimed in claim 1, which is characterized in that: and 3, protecting the steel bars after the steel bars are implanted and positioned, preventing collision and displacement, keeping for 24 hours, and bearing after the structural adhesive is cured.
4. The existing railway bridge simply-supported double-T beam transverse reinforcing construction method as claimed in claim 1, which is characterized in that: in the step 5, the bending of the steel bar and the hook of the tail section meet the design requirement, the tail section of the bent steel bar adopts a right-angle-shaped hook, the length of a straight line section of a hook end is not less than 3d, the bending diameter of a straight structure is not less than 5d, the bent steel bar of the part of the design drawing is in a curve shape, the bent steel bar is bent into a smooth curve during construction, the curvature radius of the curve is not less than 12 times of the diameter of the steel bar, binding connection is adopted between a field and a beam embedded steel bar, the binding length is not less than 35d, and the number of joints in the same section is not more than 50%.
5. The existing railway bridge simply-supported double-T beam transverse reinforcing construction method as claimed in claim 1, which is characterized in that: and 7, when the concrete pouring is influenced by the undersize beam gaps, properly chiseling the edges of the ballast grooves.
6. The existing railway bridge simply-supported double-T beam transverse reinforcing construction method as claimed in claim 1, which is characterized in that: and 8, completing the concrete of the prestressed concrete slab in the construction in the step 8 by one-time continuous pouring, wherein construction joints cannot be reserved.
7. The existing railway bridge simply-supported double-T beam transverse reinforcing construction method as claimed in claim 1, which is characterized in that: in the step 10, the anchor sealing concrete is fine aggregate concrete micro-expansion concrete with the same strength grade as the member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210502399.8A CN114808765A (en) | 2022-05-09 | 2022-05-09 | Construction method for transversely reinforcing existing railway bridge simply-supported double T-shaped beams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210502399.8A CN114808765A (en) | 2022-05-09 | 2022-05-09 | Construction method for transversely reinforcing existing railway bridge simply-supported double T-shaped beams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114808765A true CN114808765A (en) | 2022-07-29 |
Family
ID=82514061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210502399.8A Pending CN114808765A (en) | 2022-05-09 | 2022-05-09 | Construction method for transversely reinforcing existing railway bridge simply-supported double T-shaped beams |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114808765A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0782709A (en) * | 1993-09-14 | 1995-03-28 | Oriental Constr Co Ltd | Reinforcing method for concrete structure, employing hollow pc steel bar |
| WO1997032084A1 (en) * | 1996-02-29 | 1997-09-04 | Corporation Hork | Method of repairing and reinforcing prestressed concrete structure |
| CN1448583A (en) * | 2002-03-28 | 2003-10-15 | 上海铁路局工务技术开发服务公司 | Method for reinforcement of span 32m piece-divided prestressed concrete T-type beam |
| KR20080052303A (en) * | 2006-12-06 | 2008-06-11 | 에이버겔디 지 빔 피티와이 리미티드 | Continuous span structure |
| CN102535357A (en) * | 2012-02-21 | 2012-07-04 | 中南大学 | Method for strengthening double-T bridge composite structure for railway |
| CN103243662A (en) * | 2013-05-28 | 2013-08-14 | 中铁上海设计院集团有限公司 | Reconstruction and reinforcement method for existing railroad bridge |
| CN106320189A (en) * | 2016-08-30 | 2017-01-11 | 中铁四局集团第四工程有限公司 | Transverse reinforcing construction method of existing railway line T beam |
| CN208136739U (en) * | 2018-04-13 | 2018-11-23 | 河南省交科公路勘察设计有限公司 | A kind of novel reinforced device of T beam diaphragm plate |
| JP2019065605A (en) * | 2017-10-02 | 2019-04-25 | 東日本高速道路株式会社 | Repair method of PC structure |
| CN208981171U (en) * | 2018-06-04 | 2019-06-14 | 山东信诚建筑规划设计有限公司 | A kind of double-disk T bridge reinforcement structure |
| CN110965484A (en) * | 2019-12-17 | 2020-04-07 | 中交路桥建设有限公司 | New and old bridge widening reinforcing method |
-
2022
- 2022-05-09 CN CN202210502399.8A patent/CN114808765A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0782709A (en) * | 1993-09-14 | 1995-03-28 | Oriental Constr Co Ltd | Reinforcing method for concrete structure, employing hollow pc steel bar |
| WO1997032084A1 (en) * | 1996-02-29 | 1997-09-04 | Corporation Hork | Method of repairing and reinforcing prestressed concrete structure |
| CN1448583A (en) * | 2002-03-28 | 2003-10-15 | 上海铁路局工务技术开发服务公司 | Method for reinforcement of span 32m piece-divided prestressed concrete T-type beam |
| KR20080052303A (en) * | 2006-12-06 | 2008-06-11 | 에이버겔디 지 빔 피티와이 리미티드 | Continuous span structure |
| CN102535357A (en) * | 2012-02-21 | 2012-07-04 | 中南大学 | Method for strengthening double-T bridge composite structure for railway |
| CN103243662A (en) * | 2013-05-28 | 2013-08-14 | 中铁上海设计院集团有限公司 | Reconstruction and reinforcement method for existing railroad bridge |
| CN106320189A (en) * | 2016-08-30 | 2017-01-11 | 中铁四局集团第四工程有限公司 | Transverse reinforcing construction method of existing railway line T beam |
| JP2019065605A (en) * | 2017-10-02 | 2019-04-25 | 東日本高速道路株式会社 | Repair method of PC structure |
| CN208136739U (en) * | 2018-04-13 | 2018-11-23 | 河南省交科公路勘察设计有限公司 | A kind of novel reinforced device of T beam diaphragm plate |
| CN208981171U (en) * | 2018-06-04 | 2019-06-14 | 山东信诚建筑规划设计有限公司 | A kind of double-disk T bridge reinforcement structure |
| CN110965484A (en) * | 2019-12-17 | 2020-04-07 | 中交路桥建设有限公司 | New and old bridge widening reinforcing method |
Non-Patent Citations (1)
| Title |
|---|
| 崔树强: "铁路预应力混凝土简支T梁横向预应力联结加固施工技术", 上海铁道科技, vol. 29, no. 4, 15 December 2007 (2007-12-15), pages 41 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108914785B (en) | Hanging basket cantilever pouring construction method of multi-chamber corrugated steel web continuous beam bridge | |
| CN210857279U (en) | Post-cast concrete temporary support column | |
| CN102116061A (en) | Masonry construction method for filling wall core pillar, core girder and building blocks into framework structure | |
| CN101368371A (en) | Cast-in-situ continuous beam construction method for special railway line stands | |
| CN110593311A (en) | Post-cast strip concrete temporary support column | |
| CN112342934A (en) | Construction method of high-stability curve bridge plate | |
| CN113818562A (en) | Construction method of assembled frame structure | |
| CN108755394A (en) | A kind of method of presstressed reinforcing steel reinforcement bridge abnormity pier stud | |
| CN114808765A (en) | Construction method for transversely reinforcing existing railway bridge simply-supported double T-shaped beams | |
| CN112982735A (en) | Construction method for assembling integral ring beam, lintel, waist beam and constructional column | |
| CN111719869A (en) | Masonry engineering construction process | |
| CN208843546U (en) | A kind of structure adjusting stairway shaft length | |
| CN111648411A (en) | Downward-turning type post-cast strip support replacing structure, construction method and post-cast strip construction method | |
| CN111691697A (en) | Key construction method for reliable reinforcement of cracked shear wall | |
| CN114541922A (en) | Combined windowsill coping construction method based on cement hollow building blocks | |
| CN111663779A (en) | Closed construction method for metallurgical industry factory building | |
| CN108612126B (en) | Method for determining setting position of construction joint of reinforced concrete retaining wall | |
| CN106193578B (en) | It is a kind of that modular system and construction technology are matched somebody with somebody based on groove type quarter bend | |
| CN217629734U (en) | A exempt from to tear open template structure for encorbelment gate pier inclined plane and bracket inclined plane pouring construction | |
| CN219410537U (en) | Quick maintenance structure of anti-collision wall of inverted T-shaped bent cap | |
| CN110735529A (en) | Construction process for shear wall plastic-wood combined template ultra-low-loss supporting construction | |
| CN114687467B (en) | Vertical connection pouring method and correction support tool for assembled prefabricated shear wall | |
| CN114961313B (en) | Post-tensioned prestressed floor slab anchoring end repairing method | |
| CN219211466U (en) | Prefabricated T beam steel bar jig device | |
| CN210659252U (en) | Lintel cement formwork |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |