CN110145159B - Welding connection contact net hard cross beam and construction method thereof - Google Patents
Welding connection contact net hard cross beam and construction method thereof Download PDFInfo
- Publication number
- CN110145159B CN110145159B CN201910559265.8A CN201910559265A CN110145159B CN 110145159 B CN110145159 B CN 110145159B CN 201910559265 A CN201910559265 A CN 201910559265A CN 110145159 B CN110145159 B CN 110145159B
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- cross beam
- hard
- steel column
- beams
- contact net
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 238000003466 welding Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000005536 corrosion prevention Methods 0.000 claims description 2
- 238000009417 prefabrication Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/28—Manufacturing or repairing trolley lines
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Laser Beam Processing (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a welded contact net hard beam and a construction method thereof, wherein the hard beam comprises a plurality of steel columns, a beam is connected between two adjacent steel columns, the steel columns and the beam are prefabricated structural members, the height of the steel columns is determined according to the measured basic elevation, the length of the beam is determined according to the measured center distance of the two foundations, and the load of the beam is determined according to the vertical load born by the beam under the normal use condition; the construction method comprises the steps of pouring a foundation; calculating the required negative sag of the beam; determining the height of each steel column of the hard beam, and prefabricating; determining the length of each group of beams of the hard beams, and prefabricating the beams according to the required negative sag; installing and fixing the steel column on a foundation; transferring the cross beam in place, and rechecking the length of the cross beam; and hoisting the cross beam, temporarily bolting the cross beam and the steel column, adjusting the cross beam to the required negative sag by using a crane, then bolting for the second time, and finally welding and connecting at the joint.
Description
Technical Field
The invention relates to a contact net hard beam, in particular to a contact net hard beam connected by welding and a construction method thereof.
Background
Compared with the traditional hard beam connected by the flange plates, the welded door-type hard beam has the advantages of good rigidity and no deformation, but has more complex construction process requirements, more procedures, welding, adjusting and other procedures, and has higher construction difficulty.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a welded contact net hard beam and a construction method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
a construction method of a welded contact net hard beam comprises the following steps:
step one: the foundation pouring, the center line of each foundation is ensured to be on a straight line during construction, the elevation of each foundation is measured by adopting a level gauge, and the center distance between two adjacent foundations is measured by adopting a laser range finder and a level gauge;
step two: calculating the required negative sag of the beam of the hard beam according to the vertical load of the hard beam under normal use conditions;
step three: determining the height of each steel column of the hard beam according to the basic elevation obtained by measurement in the step one, and prefabricating;
step four: determining the length of each group of beams of the hard beams according to the center distance of the two foundations measured in the first step, and prefabricating the beams according to the negative sag calculated in the second step;
step five: installing and fixing the prefabricated steel column on the foundation, and correcting the position of the steel column by using a positive rod device or a crowbar;
step six: the prefabricated cross beams are transported in place, assembled and connected in groups, and the length of the cross beams is checked by using a laser range finder;
step seven: hoisting the cross beam, directly welding the side sections of the cross beam on the side support posts of the steel column, temporarily bolting the straight sections of the cross beam and the top support posts of the middle column of the steel column, adjusting the straight sections of the cross beam to the required negative relaxation degree by using a crane, then performing secondary bolting, finally performing welding connection at the joint, and observing the negative relaxation degree value of the cross beam in real time by using a digital display level ruler during welding.
The sequence of the third step and the fourth step can be exchanged or can be performed simultaneously.
According to the hard beam construction method, the size information of the steel column and the beam is determined through on-site measurement, prefabrication is performed strictly according to the required size, on-site construction errors are controlled strictly, and construction accuracy is ensured; the negative degree of the cross beams is calculated in advance, factory prefabrication is carried out according to the required negative degree, and the negative degree of each group of cross beams is ensured to reach the standard; and a detection procedure is introduced in the assembly process and after the assembly is completed, so that the construction is ensured to be in place once, and the reworking phenomenon is avoided. By adopting the construction method provided by the invention, the construction process can be greatly simplified, the construction precision is ensured, and the construction efficiency is improved.
Preferably, in the first step: the theodolite measurement is adopted to ensure that the central line of each foundation is on the same straight line, and the theodolite measurement accuracy is high.
Preferably, in the second step: the vertical load comprises the dead weight of the cross beam, overhauling load and static load.
Preferably, in the second step: the static load is a load generated by dead weight of the overhead contact system after the overhead contact system is hung and installed.
Preferably, in the fifth step: and the laser range finder and the level meter are adopted to measure the installation position of the steel column, so that the steel column is ensured to be correct in both the line direction and the vertical line direction.
Preferably, in the seventh step: after the welding connection of the cross beam and the steel column is completed, the corrosion prevention treatment is also carried out.
The invention also discloses a welded contact net hard beam, which comprises a plurality of steel columns, wherein a beam is connected between two adjacent steel columns, the steel columns and the beam are prefabricated structural members, the height of each steel column is determined according to the measured basic elevation, the length of each beam is determined according to the measured center distance between the two foundations, and the load of each beam is determined according to the vertical load born by the beam under the normal use condition.
The contact net hard beam has the advantages of high manufacturing precision, convenience in assembly and construction and capability of improving construction precision and efficiency.
Preferably, the elevation of the foundation is measured by a level gauge, and the center distance of the two foundations is measured by a laser range finder and the level gauge.
Preferably, the steel column comprises a side column and a middle column, a column top column is arranged above the middle column, the cross beam comprises a cross beam side section and a cross beam straight section, the cross beam side section and the cross beam straight section are assembled and connected through connecting sleeves, the cross beam side section is in welded connection with the side column, and the cross beam straight section is in welded connection with the column top column after being bolted.
Preferably, the cross beam and the steel column are constructed according to the construction method of the welded contact net hard cross beam.
Compared with the prior art, the invention has the beneficial effects that:
according to the hard beam construction method, the size information of the steel column and the beam is determined through on-site measurement, prefabrication is performed strictly according to the required size, on-site construction errors are controlled strictly, and construction accuracy is ensured; the negative degree of the cross beams is calculated in advance, factory prefabrication is carried out according to the required negative degree, and the negative degree of each group of cross beams is ensured to reach the standard; and a detection procedure is introduced in the assembly process and after the assembly is completed, so that the construction is ensured to be in place once, and the reworking phenomenon is avoided. By adopting the construction method provided by the invention, the construction process can be greatly simplified, the construction precision is ensured, and the construction efficiency is improved.
The contact net hard beam has the advantages of high manufacturing precision, convenience in assembly and construction and capability of improving construction precision and efficiency.
Description of the drawings:
fig. 1 is a schematic structural view of a welded contact net hard beam according to the present invention.
The marks in the figure: the device comprises a 1-side pillar, a 2-middle pillar, a 3-top pillar, a 4-connecting sleeve, a 5-bolt, a 6-beam side section, a 7-beam straight section and an 8-foundation.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Example 1
A construction method of a welded contact net hard beam comprises the following steps:
step one: the foundation pouring, the theodolite measurement is adopted to ensure that the central line of each foundation is on a straight line during construction, the level gauge is adopted to measure the elevation of each foundation, and the laser range finder and the level gauge are adopted to measure the central distance between two adjacent foundations;
step two: calculating the required load of the beam of the hard beam according to the vertical load of the hard beam under normal use conditions, wherein the vertical load comprises the dead weight of the beam, maintenance load and static load, and the static load is the load generated due to the dead weight of the overhead contact system after the overhead contact system is hung and installed;
step three: determining the height of each steel column of the hard beam according to the basic elevation obtained by measurement in the step one, and prefabricating;
step four: determining the length of each group of beams of the hard beams according to the center distance of the two foundations measured in the first step, and prefabricating the beams according to the negative sag calculated in the second step;
step five: the prefabricated steel column is installed and fixed on the foundation, and the installation position of the steel column is measured by adopting a laser range finder and a level meter, so that the steel column is ensured to be correct in both the line direction and the vertical line direction;
step six: the prefabricated cross beams are transported in place, assembled and connected in groups, and the length of the cross beams is checked by using a laser range finder;
step seven: hoisting the cross beam, directly welding the side sections of the cross beam on the side support posts of the steel column, temporarily bolting the straight sections of the cross beam and the top support posts of the middle column of the steel column, adjusting the straight sections of the cross beam to the required negative sag by using a crane, then performing secondary bolting, and finally performing welding connection and anti-corrosion treatment at the joint, and observing the negative sag value of the cross beam in real time by using a digital display level ruler during welding.
The sequence of the third step and the fourth step can be exchanged or can be performed simultaneously.
Example 2
As shown in fig. 1, the overhead line system hard beam in welded connection comprises a plurality of steel columns, wherein each steel column comprises two side columns 1 and a plurality of middle columns 2, and column top columns 3 are arranged at the tops of the middle columns 2. The contact net hard beam further comprises a plurality of beams, each beam comprises a beam edge section 6 and a beam straight section 7, and the beam edge sections 6 and the beam straight sections 7 are spliced and connected through connecting sleeves 4.
The steel column and the cross beam are prefabricated structural members, the height of the steel column is determined according to the elevation of the measured foundation 8, the length of the cross beam is determined according to the center distance between the measured foundations 8, and the load of the cross beam is determined according to the vertical load applied to the cross beam under normal use conditions. The elevation of the foundation 8 is measured by a level gauge, and the center distance of the two foundations 8 is measured by a laser range finder and a level gauge.
The beam side section 6 is directly welded with the side support 1, and the beam straight section 7 is welded with the column top support 3 after being connected by the bolts 5.
The above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail in the present specification with reference to the above embodiments, the present invention is not limited to the above specific embodiments, and thus any modifications or equivalent substitutions are made to the present invention; all technical solutions and modifications thereof that do not depart from the spirit and scope of the invention are intended to be covered by the scope of the appended claims.
Claims (6)
1. The construction method of the hard cross beam of the contact net connected by welding is characterized by comprising the following steps of:
step one: the foundation pouring, the center line of each foundation is ensured to be on a straight line during construction, the elevation of each foundation is measured by adopting a level gauge, and the center distance between two adjacent foundations is measured by adopting a laser range finder and a level gauge;
step two: calculating the required negative sag of the beam of the hard beam according to the vertical load of the hard beam under normal use conditions;
step three: determining the height of each steel column of the hard beam according to the basic elevation obtained by measurement in the step one, and prefabricating;
step four: determining the length of each group of beams of the hard beams according to the center distance of the two foundations measured in the first step, and prefabricating the beams according to the negative sag calculated in the second step;
step five: installing and fixing the prefabricated steel column on the foundation, and correcting the position of the steel column by using a positive rod device or a crowbar;
step six: the prefabricated cross beams are transported in place, assembled and connected in groups, and the length of the cross beams is checked by using a laser range finder;
step seven: hoisting the cross beam, directly welding the side sections of the cross beam on the side support posts of the steel column, temporarily bolting the straight sections of the cross beam and the top support posts of the middle column of the steel column, adjusting the straight sections of the cross beam to the required negative relaxation degree by using a crane, then performing secondary bolting, finally performing welding connection at the joint, and observing the negative relaxation degree value of the cross beam in real time by using a digital display level ruler during welding.
2. The method for constructing a welded contact net hard beam according to claim 1, wherein in the first step: theodolite measurements are used to ensure that the centerlines of the foundations are in a straight line.
3. The method for constructing a welded contact net hard beam according to claim 1, wherein in the second step: the vertical load comprises the dead weight of the cross beam, overhauling load and static load.
4. A construction method of a welded contact net hard beam according to claim 3, wherein in the second step: the static load is the load generated by the dead weight of the overhead contact system after the overhead contact system is hung and installed.
5. The method for constructing a welded contact net hard beam according to claim 1, wherein in the fifth step: and the laser range finder and the level meter are adopted to measure the installation position of the steel column, so that the steel column is ensured to be correct in both the line direction and the vertical line direction.
6. The construction method of a welded contact net hard beam according to any one of claims 1 to 5, wherein in the seventh step: after the welding connection of the cross beam and the steel column is completed, the corrosion prevention treatment is also carried out.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910559265.8A CN110145159B (en) | 2019-06-25 | 2019-06-25 | Welding connection contact net hard cross beam and construction method thereof |
| DE212020000443.9U DE212020000443U1 (en) | 2019-06-25 | 2020-06-23 | Welded hard cross member of an overhead contact line system |
| PCT/CN2020/097591 WO2020259469A1 (en) | 2019-06-25 | 2020-06-23 | Welded overhead line system hard cross beam and construction method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910559265.8A CN110145159B (en) | 2019-06-25 | 2019-06-25 | Welding connection contact net hard cross beam and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145159A CN110145159A (en) | 2019-08-20 |
| CN110145159B true CN110145159B (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910559265.8A Active CN110145159B (en) | 2019-06-25 | 2019-06-25 | Welding connection contact net hard cross beam and construction method thereof |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110145159B (en) |
| DE (1) | DE212020000443U1 (en) |
| WO (1) | WO2020259469A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145159B (en) * | 2019-06-25 | 2024-02-27 | 中铁八局集团电务工程有限公司 | Welding connection contact net hard cross beam and construction method thereof |
| CN110594536B (en) * | 2019-09-04 | 2020-12-11 | 河南省安装集团有限责任公司 | Verticality adjusting method for tower equipment |
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-
2019
- 2019-06-25 CN CN201910559265.8A patent/CN110145159B/en active Active
-
2020
- 2020-06-23 DE DE212020000443.9U patent/DE212020000443U1/en active Active
- 2020-06-23 WO PCT/CN2020/097591 patent/WO2020259469A1/en active Application Filing
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| JP2001311412A (en) * | 2000-04-28 | 2001-11-09 | East Japan Railway Co | Connecting structure of brace and beam for construction |
| CN101073994A (en) * | 2007-06-19 | 2007-11-21 | 中铁电气化局集团有限公司 | Contact network system of high-speed electric railway |
| RU96273U1 (en) * | 2010-03-15 | 2010-07-20 | Открытое Акционерное Общество "Научно-Производственный Комплекс "Дедал" | COMPLEX OF PROTECTION OF LONG-TERM TWO-RAILWAY SECTIONS |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020259469A1 (en) | 2020-12-30 |
| CN110145159A (en) | 2019-08-20 |
| DE212020000443U1 (en) | 2021-04-19 |
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