CN104264537A - D-shaped portable beam adjustable positioning fastener support - Google Patents
D-shaped portable beam adjustable positioning fastener support Download PDFInfo
- Publication number
- CN104264537A CN104264537A CN201410512849.7A CN201410512849A CN104264537A CN 104264537 A CN104264537 A CN 104264537A CN 201410512849 A CN201410512849 A CN 201410512849A CN 104264537 A CN104264537 A CN 104264537A
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- Prior art keywords
- positioning
- positioning bolt
- buckle
- bolt
- support
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/38—Indirect fastening of rails by using tie-plates or chairs; Fastening of rails on the tie-plates or in the chairs
- E01B9/44—Fastening the rail on the tie-plate
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2201/00—Fastening or restraining methods
- E01B2201/04—Fastening or restraining methods by bolting, nailing or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
The invention discloses a D-shaped portable beam adjustable positioning fastener support. The central axis of a positioning bolt deviates from the central axis of a mounting hole, and an annular eccentric clearance is formed between the positioning bolt and a locking press block. The D-shaped portable beam adjustable positioning fastener support is characterized in that a cylindrical eccentric washer is arranged between the positioning bolt and the mounting hole and inserted into the annular eccentric clearance, the whole inner wall of the eccentric washer is close to the outer wall of the positioning bolt, and the whole outer wall of the eccentric washer is close to the inner wall of the locking press block. The D-shaped portable beam adjustable positioning fastener support has the advantages that the clearance between the positioning bolt and the inner wall of the locking press block mounting hole is eliminated by inserting the eccentric washer, the movement amount of the locking press block is eliminated as the positioning bolt is fixed, a mounted portable beam fastening plate cannot move, reliability of a rail is ensured, and safety of a railway is improved.
Description
Technical field
The present invention relates to a kind of railroad track accessory, particularly relate to a kind of D type just adjustable positioning buckling element support of beam.
Background technology
When laying interim rail, rail is fixed on crossbeam by just beam fastener system.Mandate day is 2010.05.12, application number is the temporary beam rail fastener for construction of 200920034127.X, it is made up of buckle positioning support, crossbeam side gusset, adjustable buckle, stop washer and positioning bolt, buckle positioning support directly and crossbeam side link of boards, adjustable buckle is connected on the gusset of crossbeam side and one end by positioning bolt, stop washer and leans and prop up at rail bottom rail, one end is pressed on the gusset of crossbeam side in addition, is provided with angle of insulating between adjustable buckle and rail bottom.This technical scheme with solve traditional rail fastening with connect between crossbeam insecure, the insecure problem of circuit isolation.Above-mentioned rail fastening is mainly used in railway track construction process, plays positioning action to guarantee rail tram.
For said structure, authorized announcement date is 2014.07.09, application number be 201420027057.6 a kind of construction beam rail positioning component it is improved, it comprises the just beam buckle be made up of epoxy resin, just one end of beam buckle is pressed on buckle positioning support, just the other end of beam buckle is directly pressed in the lower position of rail, wherein just the upper surface of beam buckle is provided with the first concaveconvex structure, the soffit of locking briquetting is provided with the second concaveconvex structure, and the first concaveconvex structure and the second concaveconvex structure cooperatively interact.Authorized announcement date is on July 09th, 2014, application number is the one just beam buckle assembly of 201420028190.3, comprise just beam buckle and locking briquetting, just beam buckle is provided with the adjustment hole of sleeve configuration, locking pressure plate is provided with circular installing hole, circular mounting hole site is in top and in alignment with the adjustment hole of sleeve configuration, the width of adjustment hole is suitable with the diameter of installing hole.
In just beam fastener system actual installation process, just the adjustment hole of beam buckle is enclosed within positioning bolt, in order to make just beam buckle the other end can with rail close contact, needs move and regulate the position of just beam buckle, and therefore just the bore of the adjustment hole of beam buckle is a little large than the diameter of positioning bolt, simultaneously owing to just being reached the object of locking mutually between beam buckle and locking briquetting by toothrow, namely just the groove of toothrow corresponds to the projection of locking briquetting toothrow on beam buckle, just on beam buckle, the projection of toothrow then corresponds to the groove of locking briquetting, under the prerequisite that the installing hole of locking briquetting is corresponding with the adjustment hole of just beam buckle, the toothrow of locking briquetting soffit can mate with the upper surface toothrow of just beam buckle, although in the fabrication process, by substantially equal with the adjustment hole width of just beam buckle for the installing hole bore of locking briquetting, but because the reason that toothrow is arranged, in concrete installation process, a certain amount of skew can be there is in the center line of the installing hole of locking briquetting with the center line of the just adjustment hole of beam buckle, side-play amount is the width of a toothrow, can with the bottom of rail near rear by one end of just beam buckle, the center line of positioning bolt is alignd with the center line of just beam buckle adjustment hole simultaneously, now the center line of positioning bolt has certain side-play amount with the center line of locking briquetting installing hole, namely there is between positioning bolt and installing hole certain gap, when the vibrations that train produces through rail, just beam buckle can be made together with locking briquetting to do a small amount of movement, maximum amount of movement is the gap value between positioning bolt and installing hole, just have intermittency between beam buckle and rail to produce, easily cause loosening of rail, leave potential safety hazard.
Positioning support is bolted on crossbeam, the side of adjustable buckle is pressed on positioning support, the opposite side of adjustable buckle is pressed on rail, in actual installation process, warp near rail one end because the factors such as beam deformation, screw between positioning support with crossbeam do not mate cause on positioning support, make the side of adjustable buckle unsettled, adjustable buckle cannot push down the lower end of rail, can leave potential safety hazard equally to railway.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind ofly can eliminate rail with just beam buckle because shaking the D type just adjustable positioning buckling element support of beam of the shift phenomenon caused.
The present invention solves the problems of the technologies described above adopted technical scheme: D type is the adjustable positioning buckling element support of beam just, comprise the positioning support be buckled on crossbeam, just beam buckle assembly, positioning bolt and nut, described just beam buckle assembly comprises just beam buckle and locking briquetting, the upper surface of described just beam buckle is provided with the first dentalation, the soffit of described locking briquetting is provided with the second dentalation, first dentalation and the second dentalation coincide mutually, described just beam buckle is provided with the adjustment hole of sleeve configuration, described locking briquetting is provided with circular installing hole, positioning bolt is fixed on crossbeam through described adjustment hole and installing hole, nut is screwed on described positioning bolt, described positioning bolt diameter is less than the width of adjustment hole, described positioning bolt diameter is less than the bore of installing hole, the central axis of the center axis deviation installing hole of described positioning bolt, there is between described positioning bolt and described locking briquetting ring eccentric gap, it is characterized in that being provided with eccentric gasket between described positioning bolt and installing hole, described eccentric gasket is cylindrical body, described cylinder-shaped eccentric gasket inserts in ring eccentric gap, the whole inwall of described eccentric gasket is adjacent to the outer wall of positioning bolt, the whole outer wall of described eccentric gasket is adjacent to the inwall of locking briquetting.
The eccentric gasket upper end of described cylindrical body is provided with annular shelf, and described annular shelf rests the top of described locking briquetting.The setting of annular shelf, make picking and placeing of eccentric gasket convenient, because the position in the ring eccentric gap between positioning bolt and locking briquetting is not fixed, the particular location of eccentric adjustment packing ring is carried out by rotating annular shelf, eccentric gasket energy complete matching, in ring eccentric gap, inserts more convenient.
The outer wall center of the eccentric gasket of described cylindrical body does not overlap with inwall center.Eccentric gasket one sidewall of cylindrical body is thicker, and another relative sidewall is thinner, and thin location slowly seamlessly transits to thicker part, forms an eccentric hoop structure.
The center line of described positioning bolt passes the center line of adjustment hole.Adjustment hole is sleeve configuration, and it has certain length, and center line is consistent with the length direction of adjustment hole, positioning bolt to the two side of adjustment hole apart from equal.
The width of described adjustment hole is equal with the bore of installing hole.The dentalation of locking briquetting soffit can mate mutually with the dentalation of just beam buckle upper surface.
The first described dentalation comprises numerous first strip projected parts spaced apart and the first strip groove, the second described dentalation comprises numerous second strip projected parts spaced apart and the second strip groove, the first described strip projected parts and the second strip groove fit, the first described strip groove and the second strip male cooperation.The cross section of strip projected parts and strip groove is in the shape of the letter V, and after locking briquetting and just beam buckle coordinating, locks reliable, avoids relative movement between the two.
First strip projected parts and the first strip groove part linearly type, be parallel to each other between multiple first strip projected parts, be parallel to each other between multiple first strip groove.
That end that on installing hole inwall, Distance positioning bolt is nearest is most proximal end, and on installing hole inwall, Distance positioning bolt that end is farthest distalmost end, and described most proximal end is consistent with the length bearing of trend of the line between distalmost end and adjustment hole.
Described positioning bolt is arranged with elastic component, and described elastic component is between annular shelf and nut.The setting of flexure strip makes locking briquetting can compress just beam buckle securely.
The wall thickness of the thicker part of described eccentric gasket is greater than the gap width between positioning bolt and adjustment hole sidewall, and the wall thickness of the thin location of described eccentric gasket is less than the gap width between positioning bolt and adjustment hole sidewall.
Positioning bolt is through being fixed on crossbeam behind the inner segment region of positioning support, just the outer end of beam buckle is pressed in the outer section region of positioning support, be positioned at the leveling bolt positioning support outside just beam buckle being equipped with vertical direction, the bottom of described leveling bolt leans in described beam surface upper, the soffit in the outer section region of described positioning support leaves the upper surface of crossbeam, and the inner of described just beam buckle is pressed on rail.The rear end of positioning support adds leveling bolt, can eliminate warping between positioning support and crossbeam, and can make keeping parallelism between positioning support and crossbeam, finally makes the inner of just beam buckle push down rail, ensures the steadiness of railway in running.
The dull and stereotyped soffit of described positioning support is the level of state, and has horizontal clearance between the flat board of positioning support and crossbeam, and the upper surface of described just beam buckle is the level of state.Keeping parallelism between positioning support and crossbeam can be made, make positioning support be in level on the whole, thus make the just beam buckle that is positioned at above positioning support smooth, rail can be pushed down securely.
The flat board of described positioning support is provided with protruding block, described protruding block with form a vertical abutment face between flat board, just the outer end of beam buckle is near described vertical abutment face.
Described protruding block place is provided with a screwed hole running through dull and stereotyped, and described leveling bolt leans on crossbeam through described screwed hole.When leveling bolt is twisted downwards time, the lower end of leveling bolt is pushed up on crossbeam, the rear end of positioning support is moved up, thus makes positioning support be in level on the whole.
The inside region length of described locking briquetting is greater than exterior lateral area, the end of the close just inside region of beam buckle of end of the inside region of locking briquetting.More multiple pressure power on locking briquetting passes to the inner side of just beam buckle, and just beam buckle can unclipped railway lines better.
Compared with prior art, advantage of the present invention is that cylinder-shaped eccentric gasket inserts in ring eccentric gap, the whole inwall of eccentric gasket is adjacent to the outer wall of positioning bolt, the whole outer wall of eccentric gasket is adjacent to the inwall of locking briquetting, the insertion of eccentric gasket eliminates the gap between positioning bolt and locking briquetting installing hole inwall, because positioning bolt is fixed, the amount of movement of locking briquetting has been eliminated, owing to locking briquetting and being just mutually lock between beam buckle, therefore the just beam buckle after installing also just cannot move, ensure that the reliability of rail, improve the security performance of railway.
accompanying drawing explanation
Fig. 1 is that in prior art, just beam fastener system is applied to the structure chart () in railway;
Fig. 2 is the matching chart of just beam buckle of the present invention, locking briquetting and positioning bolt;
Fig. 3 is the structure chart of locking briquetting of the present invention;
Fig. 4 is the structure chart that the present invention is applied in railway;
Fig. 5 is the structure chart of non-setting-up eccentricity packing ring in prior art;
Fig. 6 has installed the structure chart of eccentric gasket in the present invention;
Fig. 7 is the sectional view of eccentric gasket of the present invention;
Fig. 8 is the lateral view of just beam buckle of the present invention;
Fig. 9 is that in prior art, just beam fastener system is applied to the structure chart (two) in railway;
Figure 10 is the structure chart after having added levelling bolt in the present invention;
Figure 11 is A place enlarged drawing in Figure 10;
Figure 12 is the structure chart of positioning support of the present invention.
detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Figure 1 shows that the structure chart of prior art because positioning bolt 3 and locking briquetting 6 installing hole 8 between there is gap 15, make when it's convenient beam buckle 5 cannot with rail 16 near, just there is gap 17 between beam buckle 5 and rail 16, rail easily loosened, the invention provides the D type just adjustable positioning buckling element support of beam, comprise the positioning support 2 be buckled on crossbeam 1, just beam buckle assembly, positioning bolt 3 and nut 4, just beam buckle assembly comprises just beam buckle 5 and locking briquetting 6, just the upper surface of beam buckle 5 is provided with the first dentalation, the soffit of locking briquetting 6 is provided with the second dentalation, first dentalation and the second dentalation coincide mutually, just beam buckle 5 is provided with the adjustment hole 7 of sleeve configuration, locking briquetting 6 is provided with circular installing hole 8, positioning bolt 3 is fixed on crossbeam 1 through adjustment hole 7 and installing hole 8, nut 4 is screwed on positioning bolt 3, positioning bolt 3 diameter is less than the width of adjustment hole 7, positioning bolt 3 diameter is less than the bore of installing hole 8, the central axis of the center axis deviation installing hole 8 of positioning bolt 3, between positioning bolt 3 and locking briquetting 6, there is ring eccentric gap 9, eccentric gasket 10 is provided with between positioning bolt 3 and installing hole 8, eccentric gasket 10 is in cylindrical body, cylinder-shaped eccentric gasket 10 inserts in ring eccentric gap 9, the whole inwall of eccentric gasket 10 is adjacent to the outer wall of positioning bolt 3, the whole outer wall of eccentric gasket 10 is adjacent to the inwall of locking briquetting 6.
Eccentric gasket 10 upper end of cylindrical body is provided with annular shelf 11, and annular shelf 11 rests the top of locking briquetting 6.
The outer wall center of the eccentric gasket 10 of cylindrical body does not overlap with inwall center.
The center line of positioning bolt 3 passes the center line of adjustment hole 7.Adjustment hole 7 is in sleeve configuration, and it has certain length, and center line is consistent with the length direction of adjustment hole 7, and positioning bolt 3 arrives the two side of adjustment hole 7 apart from equal.
The width of adjustment hole 7 is equal with the bore of installing hole 8.
First dentalation comprises numerous first strip projected parts 12 and the first strip groove 13 spaced apart, second dentalation comprises numerous second strip projected parts spaced apart and the second strip groove, first strip projected parts and the second strip groove fit, the first strip groove and the second strip male cooperation.
First strip projected parts 12 and the first strip groove 13 all linearly type, be parallel to each other between multiple first strip projected parts 12, is parallel to each other between multiple first strip groove 13.
That end that on installing hole 8 inwall, Distance positioning bolt 3 is nearest is most proximal end 31, and on installing hole 8 inwall, Distance positioning bolt 3 that end is farthest distalmost end 32, the line L between most proximal end 31 with distalmost end 32 and the length bearing of trend of adjustment hole consistent.
Positioning bolt 3 is arranged with elastic component 14, elastic component 14 is between annular shelf 11 and nut 4.
The wall thickness of the thicker part 101 of eccentric gasket 10 is greater than the gap width between positioning bolt 3 and adjustment hole 4 sidewall, and the wall thickness of the thin location 102 of eccentric gasket 10 is less than the gap width between positioning bolt 3 and adjustment hole 4 sidewall.
Positioning bolt 3 is through being fixed on crossbeam 1 behind the inner segment region 21 of positioning support 2, just the outer end of beam buckle 5 is pressed in the outer section region of positioning support 2, be positioned at the leveling bolt 18 positioning support 2 outside just beam buckle 5 being equipped with vertical direction, the bottom of leveling bolt 15 leans at crossbeam 1 upper surface, the soffit in the outer section region of positioning support 2 leaves the upper surface of crossbeam 1, and just the inner of beam buckle 5 is pressed on rail 16.
Flat board 25 soffit of positioning support 2 is the level of state, and have horizontal clearance 19 between the flat board 25 of positioning support 2 and crossbeam 1, just the upper surface of beam buckle 5 is the level of state.
The flat board 20 of positioning support 2 is provided with protruding block 21, and form a vertical abutment face 22 between protruding block 21 with dull and stereotyped 20, just the outer end of beam buckle 5 is near vertical abutment face 22.
Protruding block 21 place is provided with the screwed hole 23 that runs through dull and stereotyped 20, and leveling bolt 18 leans on crossbeam 1 through screwed hole 23.
Inside region 61 length of locking briquetting 6 is greater than exterior lateral area 62, the end 511 of the close just inside region 51 of beam buckle 5 of end 611 of the inside region 61 of locking briquetting 6.
Claims (10)
1.D type is the adjustable positioning buckling element support of beam just, comprise the positioning support be buckled on crossbeam, just beam buckle assembly, positioning bolt and nut, described just beam buckle assembly comprises just beam buckle and locking briquetting, the upper surface of described just beam buckle is provided with the first dentalation, the soffit of described locking briquetting is provided with the second dentalation, first dentalation and the second dentalation coincide mutually, described just beam buckle is provided with the adjustment hole of sleeve configuration, described locking briquetting is provided with circular installing hole, positioning bolt is fixed on crossbeam through described adjustment hole and installing hole, nut is screwed on described positioning bolt, described positioning bolt diameter is less than the width of adjustment hole, described positioning bolt diameter is less than the bore of installing hole, the central axis of the center axis deviation installing hole of described positioning bolt, there is between described positioning bolt and described locking briquetting ring eccentric gap, it is characterized in that being provided with eccentric gasket between described positioning bolt and installing hole, described eccentric gasket is cylindrical body, described cylinder-shaped eccentric gasket inserts in ring eccentric gap, the whole inwall of described eccentric gasket is adjacent to the outer wall of positioning bolt, the whole outer wall of described eccentric gasket is adjacent to the inwall of locking briquetting.
2. the D type according to claim 1 just adjustable positioning buckling element support of beam, it is characterized in that the eccentric gasket upper end of described cylindrical body is provided with annular shelf, described annular shelf rests the top of described locking briquetting; The outer wall center of the eccentric gasket of described cylindrical body does not overlap with inwall center; The center line of described positioning bolt passes the center line of adjustment hole; The width of described adjustment hole is equal with the bore of installing hole.
3. the D type according to claim 1 just adjustable positioning buckling element support of beam, it is characterized in that the first described dentalation comprises numerous first strip projected parts spaced apart and the first strip groove, the second described dentalation comprises numerous second strip projected parts spaced apart and the second strip groove, the first described strip projected parts and the second strip groove fit, the first described strip groove and the second strip male cooperation; First strip projected parts and the first strip groove part linearly type, be parallel to each other between multiple first strip projected parts, be parallel to each other between multiple first strip groove.
4. the D type according to claim 1 just adjustable positioning buckling element support of beam, it is characterized in that that end that on installing hole inwall, Distance positioning bolt is nearest is most proximal end, on installing hole inwall, Distance positioning bolt that end is farthest distalmost end, and described most proximal end is consistent with the length bearing of trend of the line between distalmost end and adjustment hole.
5. the D type according to claim 1 just adjustable positioning buckling element support of beam, it is characterized in that the wall thickness of the thicker part of described eccentric gasket is greater than the gap width between positioning bolt and adjustment hole sidewall, the wall thickness of the thin location of described eccentric gasket is less than the gap width between positioning bolt and adjustment hole sidewall.
6. the D type according to claim 1 just adjustable positioning buckling element support of beam, it is characterized in that positioning bolt is fixed on crossbeam after passing the inner segment region of positioning support, just the outer end of beam buckle is pressed in the outer section region of positioning support, be positioned at the leveling bolt positioning support outside just beam buckle being equipped with vertical direction, the bottom of described leveling bolt leans in described beam surface upper, the soffit in the outer section region of described positioning support leaves the upper surface of crossbeam, and the inner of described just beam buckle is pressed on rail.
7. the D type according to claim 6 just adjustable positioning buckling element support of beam, it is characterized in that the dull and stereotyped soffit of described positioning support is the level of state, have horizontal clearance between the flat board of positioning support and crossbeam, the upper surface of described just beam buckle is the level of state.
8. the D type according to claim 7 just adjustable positioning buckling element support of beam, the flat board that it is characterized in that described positioning support is provided with protruding block, described protruding block with form a vertical abutment face between flat board, just the outer end of beam buckle is near described vertical abutment face.
9. the D type according to claim 8 just adjustable positioning buckling element support of beam, it is characterized in that described protruding block place is provided with a screwed hole running through dull and stereotyped, described leveling bolt leans on crossbeam through described screwed hole.
10. the D type according to claim 6 just adjustable positioning buckling element support of beam, is characterized in that the inside region length of described locking briquetting is greater than exterior lateral area, the end of the close just inside region of beam buckle of end of the inside region of locking briquetting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512849.7A CN104264537B (en) | 2014-09-29 | 2014-09-29 | D type is the adjustable positioning buckling element support of beam just |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512849.7A CN104264537B (en) | 2014-09-29 | 2014-09-29 | D type is the adjustable positioning buckling element support of beam just |
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| Publication Number | Publication Date |
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| CN104264537A true CN104264537A (en) | 2015-01-07 |
| CN104264537B CN104264537B (en) | 2015-12-09 |
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| CN201410512849.7A Active CN104264537B (en) | 2014-09-29 | 2014-09-29 | D type is the adjustable positioning buckling element support of beam just |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831817A (en) * | 2015-04-05 | 2015-08-12 | 北京工业大学 | Steel beam and concrete shear wall connection joint |
| CN106592350A (en) * | 2017-02-23 | 2017-04-26 | 宝鸡中铁宝桥天元实业发展有限公司 | Field installation method for railway turnout on temporary construction beam |
| WO2019134157A1 (en) * | 2018-01-08 | 2019-07-11 | 谢国安 | Rail positioning structure |
| CN110629684A (en) * | 2018-06-22 | 2019-12-31 | 郑州中原铁道工程有限责任公司 | Construction method for spliced railway construction temporary beam |
| CN111235975A (en) * | 2020-01-14 | 2020-06-05 | 岑雨霏 | Automatic regulating device for thermal expansion and cold contraction of railway fastener |
| CN111924445A (en) * | 2020-07-06 | 2020-11-13 | 长安大学 | Rail type field electric transportation device and method for rice seedlings |
| CN114318960A (en) * | 2021-12-23 | 2022-04-12 | 山东鲁道建设工程有限公司 | Construction method of spliced railway construction boundary beam |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831817A (en) * | 2015-04-05 | 2015-08-12 | 北京工业大学 | Steel beam and concrete shear wall connection joint |
| CN104831817B (en) * | 2015-04-05 | 2017-01-25 | 北京工业大学 | Steel beam and concrete shear wall connection joint |
| CN106592350A (en) * | 2017-02-23 | 2017-04-26 | 宝鸡中铁宝桥天元实业发展有限公司 | Field installation method for railway turnout on temporary construction beam |
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| CN110629684A (en) * | 2018-06-22 | 2019-12-31 | 郑州中原铁道工程有限责任公司 | Construction method for spliced railway construction temporary beam |
| CN111235975A (en) * | 2020-01-14 | 2020-06-05 | 岑雨霏 | Automatic regulating device for thermal expansion and cold contraction of railway fastener |
| CN111235975B (en) * | 2020-01-14 | 2021-11-05 | 芜湖市金友精密机械有限责任公司 | Automatic regulating device for expansion with heat and contraction with cold of railway fastener |
| CN111924445A (en) * | 2020-07-06 | 2020-11-13 | 长安大学 | Rail type field electric transportation device and method for rice seedlings |
| CN114318960A (en) * | 2021-12-23 | 2022-04-12 | 山东鲁道建设工程有限公司 | Construction method of spliced railway construction boundary beam |
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| CN104264537B (en) | 2015-12-09 |
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