CN103758162A - Roadbed slope frame girder anchor rod drawing instrument - Google Patents
Roadbed slope frame girder anchor rod drawing instrument Download PDFInfo
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- CN103758162A CN103758162A CN201410058185.1A CN201410058185A CN103758162A CN 103758162 A CN103758162 A CN 103758162A CN 201410058185 A CN201410058185 A CN 201410058185A CN 103758162 A CN103758162 A CN 103758162A
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- side slope
- roadbed side
- vierendeel girder
- anchor rod
- anchor
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Abstract
The invention discloses a roadbed slope frame girder anchor rod drawing instrument which comprises an ejection device, an anchor rod buckling-pulling support and an anchor plate. The fixed end of the ejection device abuts against a roadbed slope, the movable end of the ejection device is connected with the anchor rod buckling-pulling support, the anchor plate is installed in the anchor rod buckling-pulling support, a clamping mounting hole where a roadbed slope frame girder anchor rod passes is formed in the anchor plate, and two clamping sheets for clamping the roadbed slope frame girder anchor rod are installed in the clamping mounting hole. According to the roadbed slope frame girder anchor rod drawing instrument, the roadbed slope frame girder anchor rod can be directly drawn, the anchor rod can be casually inspected at random, and the detection capacity can be greatly improved.
Description
Technical field
The present invention relates to a kind of draw-off gear, particularly relate to a kind of roadbed side slope Vierendeel girder anchor rod drawing instrument.
Background technology
At present, be directed to roadbed side slope Vierendeel girder anchor pole and detect, the anchor rod drawing instrument of employing is all with punching jack, to join an annular working anchor combination to carry out drawing again.It needs reserved good roadbed side slope Vierendeel girder anchor pole to be detected in advance.The weak point of this anchor rod drawing instrument is: the anchor pole that 1, it can not opposite end headband crotch carries out direct drawing, Site Detection can not be inspected by random samples at random to anchor pole, can only detect reserved anchor pole, use inconvenience, owing to using reserved anchor pole, the pulling capacity of anchor pole cannot be grasped comprehensively, and then workmanship cannot be guaranteed.2, there is no anchor pole creep measurement mechanism, in the time of cannot grasping anchor rod drawing, the displacement situation of anchor pole.3, there is in design defect in work anchor and anchor clipper, is difficult to exactly dismounting, for execute-in-place is made troubles after unloading.4, because work anchor is difficult to dismounting, scene can only adopt rough way, causes drawing instrument shortening in application life.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of roadbed side slope Vierendeel girder anchor rod drawing instrument is provided.This roadbed side slope Vierendeel girder anchor rod drawing instrument can carry out direct drawing to roadbed side slope framework beam anchor pole, can accomplish the random sampling observation of anchor pole, greatly promotes detectability.
For achieving the above object, the technical solution used in the present invention is: roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: comprise that jacking system, anchor pole button pull out frame and anchor slab; The fixed end of described jacking system is connected on roadbed side slope, the mobile terminal of described jacking system is pulled out frame with anchor pole button and is connected, described anchor slab is arranged on anchor pole button and pulls out in frame, on described anchor slab, offer the hole that clamps of passing for roadbed side slope Vierendeel girder anchor pole, described in clamp in hole and be provided with two for clamping the intermediate plate of described roadbed side slope Vierendeel girder anchor pole.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, it is characterized in that: comprise counter-force base, the fixed end of described jacking system is connected on roadbed side slope by counter-force base, offers for roadbed side slope Vierendeel girder anchor pole and stretch into the first opening that anchor pole button pulls out frame on described counter-force base.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: on described anchor slab, offer with described and clamp the second opening that hole is connected.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, it is characterized in that: described in clamp hole for " V " type through hole, two described intermediate plates include and clamp inclined-plane that hole hole wall matches and for clamping the vertical clamping face of described roadbed side slope Vierendeel girder anchor pole, described inclined-plane and the vertically angle between clamping face are 15 °～20 °.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: described vertical clamping face is matsurface.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: described anchor pole button pulls out that frame comprises top board, base plate and for connecting two side plates of top board and base plate; On described top board, offer the link slot stretching into for jacking system mobile terminal; On described base plate, offer the arc groove suitable with jacking system outer wall, described anchor slab is placed on described base plate.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: at least two rollers that roll and coordinate with described jacking system outer wall are installed on the cell wall of described arc groove.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: comprise for measuring the creep measurement mechanism of described roadbed side slope Vierendeel girder anchor pole displacement.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, it is characterized in that: described creep measurement mechanism comprises dial gage, dial framework and creep measurement plate, described creep measurement plate is connected on described roadbed side slope Vierendeel girder anchor pole by geometrical clamp, described dial gage is arranged on dial framework, the gauge head of described dial gage is connected on creep measurement plate, and described dial framework is supported on roadbed side slope.
Above-mentioned roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: described anchor slab integral body is square.
The present invention compared with prior art has the following advantages:
1, of the present invention simple in structure, rationally novel in design.
2, the present invention, by setting up counter-force base, has avoided jacking system fixed end impaired effectively, has reduced the measure error of bringing because of the stressed depression of roadbed side slope scar.
3, the present invention, by offer opening on anchor slab, can make easily described extension enter and clamp in hole, has improved the installation rate of anchor slab, uses more convenient.
4, anchor slab of the present invention is made into squarely by annular, and the angle between the inclined-plane of intermediate plate and vertically clamping face strengthens, and makes after jacking system unloading, and anchor slab and intermediate plate energy Automatic-falling, do not exist the situation that is difficult to dismounting.
5, the present invention is by roller is set, and jacking system and sliding friction between arc groove cell wall is converted to roll coordinate, and improved the utilization rate of jacking system power output, and improved the service efficiency of this drawing instrument.
6, the present invention is by creep measurement mechanism is set, and the displacement situation in the time of can accurately measuring roadbed side slope Vierendeel girder anchor rod drawing has solved anchor rod drawing test and only surveyed pulling force, situation that can not displacement.
7, of the present invention to realize cost low, and result of use is good, is convenient to promote the use of.
In sum, this drawing instrument simple in structure, can inspect by random samples at random the roadbed side slope Vierendeel girder anchor pole of various sizes, without using special reserved anchor pole to carry out pull-out test, workmanship is detected and played key effect, greatly promote anchor pole detectability, and not only can test anchor rod drawing power, can also when testing, pulling capacity measure displacement, convenient operation during use.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the position relationship schematic diagram of roadbed side slope Vierendeel girder anchor pole of the present invention and roadbed side slope.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the structural representation of anchor slab of the present invention.
Fig. 4 is the annexation schematic diagram of anchor slab of the present invention and intermediate plate.
Fig. 5 is the structural representation of intermediate plate of the present invention.
Fig. 6 is the structural representation of counter-force base of the present invention.
Fig. 7 is the structural representation that anchor pole button of the present invention pulls out frame top board.
Fig. 8 is the structural representation that anchor pole button of the present invention pulls out frame base plate.
Description of reference numerals:
1-counter-force base; 1-1-the first opening; 1-2-mounting groove;
2-jacking system; 3-anchor pole button pulls out frame; 3-1-top board;
3-1-1-link slot; 3-1-2-the first bolt hole; 3-2-side plate;
3-3-base plate; 3-3-1-arc groove; 3-3-2-roller;
3-3-3-three opening; 3-3-4-the second bolt hole; 4-anchor slab;
4-1-clamp hole; 4-2-the second opening; 5-creep measurement plate;
6-geometrical clamp; 7-dial gage; 7-1-gauge head;
8-gripper shoe; 9-dial framework;
10-roadbed side slope Vierendeel girder anchor pole; 10-1-extension;
10-2-parallel-segment; 10-3-elbow; 11-intermediate plate;
11-1-inclined-plane; 11-2-vertical clamping face; 12-roadbed side slope.
The specific embodiment
As shown in Figure 1, Figure 2, a kind of roadbed side slope Vierendeel girder anchor rod drawing instrument shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, comprise that jacking system 2, anchor pole button pull out frame 3 and anchor slab 4; The fixed end of described jacking system 2 is connected on roadbed side slope 12, the mobile terminal of described jacking system 2 is pulled out frame 3 with anchor pole button and is connected, described anchor slab 4 is arranged on anchor pole button and pulls out in frame 3, on described anchor slab 4, offer for roadbed side slope Vierendeel girder anchor pole 10, pass clamp hole 4-1, described in clamp in the 4-1 of hole and be provided with two for clamping the intermediate plate 11 of described roadbed side slope Vierendeel girder anchor pole 10.In the present embodiment, preferably way is, described jacking system 2 is hydraulic jack, wherein, and the housing that the fixed end of described jacking system 2 is hydraulic jack, the large piston that the mobile terminal of described jacking system 2 is hydraulic jack.
During use, by described hydraulic jack, drive anchor pole button to pull out frame 3, described anchor pole button pulls out frame 3 and drives anchor slab 4 to move, described anchor slab 4 matches described roadbed side slope Vierendeel girder anchor pole 10 is carried out to drawing with two described intermediate plates 11, by feeding the oil pressure of hydraulic jack, detect the pulling capacity that described roadbed side slope Vierendeel girder anchor pole 10 bears, and then realize the pull-out test of roadbed side slope framework beam anchor pole 10 is detected.
In conjunction with Fig. 1, in the present embodiment, this drawing instrument is for roadbed side slope Vierendeel girder anchor pole 10 and particular design, because roadbed side slope Vierendeel girder anchor pole 10 comprises the extension 10-1 stretching out in roadbed side slope 12, the parallel-segment 10-2 being connected with extension 10-1 and the elbow 10-3 being connected with parallel-segment 10-2, described parallel-segment 10-2 and extension 10-1 perpendicular and with roadbed side slope 12 almost parallels, special construction for roadbed side slope Vierendeel girder anchor pole 10, this drawing instrument matches with described extension 10-1 by anchor slab 4, extension 10-1 is positioned at and clamps hole 4-1, and by intermediate plate 11, described extension 10-1 is clamped, and then the drive by jacking system 2 completes drawing and detects, this drawing instrument simple in structure, can inspect by random samples at random the roadbed side slope Vierendeel girder anchor pole 10 of various sizes, without using special reserved anchor pole to carry out pull-out test, workmanship is detected and played key effect, greatly promote anchor pole detectability.
As shown in Figure 2, this roadbed side slope Vierendeel girder anchor rod drawing instrument comprises counter-force base 1, the fixed end of described jacking system 2 is connected on roadbed side slope 12 by counter-force base 1, offers for roadbed side slope Vierendeel girder anchor pole 10 and stretch into the first opening 1-1 that anchor pole button pulls out frame 3 on described counter-force base 1.On described counter-force base 1, offer for the mounting groove 1-2 of jacking system 2 fixed ends is installed, by setting up counter-force base 1, effectively avoided jacking system 2 fixed ends impaired, reduced the measure error of bringing because of the stressed depression of roadbed side slope 12 scar.
As shown in Figure 3, on described anchor slab 4, offer with described and clamp the second opening 4-2 that hole 4-1 is connected.By the second opening 4-2 is set, can make easily described extension 10-1 enter and clamp in the 4-1 of hole, improved the installation rate of anchor slab 4, use more conveniently, avoid from the elbow 10-3 of roadbed side slope Vierendeel girder anchor pole 10, anchor slab 4 being slowly set with.
In conjunction with Fig. 1, Fig. 7 and Fig. 8, described anchor pole button pulls out that frame 3 comprises top board 3-1, base plate 3-3 and for connecting two side plate 3-2 of top board 3-1 and base plate 3-3; On described top board 3-1, offer the link slot 3-1-1 stretching into for jacking system 2 mobile terminals; On described base plate 3-3, offer the arc groove 3-3-1 suitable with jacking system 2 outer walls, described anchor slab 4 is placed on described base plate 3-3.Because described anchor slab 4 is placed on described base plate 3-3, anchor slab 4 is fixedly connected with roadbed side slope Vierendeel girder anchor pole 10 by intermediate plate 11, described jacking system 2 promotes anchor slab 4 by base plate 3-3 and moves, anchor slab 4 pulls out frame 3 without being fixedly connected with relation with anchor pole button, has facilitated the dismounting of on-the-spot installation and anchor slab 4.
In conjunction with Fig. 7 and Fig. 8, on described top board 3-1, be provided with a plurality of the first bolt hole 3-1-2 for being connected with side plate 3-2 upper end, on described base plate 3-3, be provided with a plurality of the second bolt hole 3-3-4 for being connected with side plate 3-2 lower end.
In conjunction with Fig. 3 and Fig. 4, described in to clamp hole 4-1 be " V " type through hole, two described intermediate plates 11 include and clamp inclined-plane 11-1 that hole 4-1 hole wall matches and for clamping the vertical clamping face 11-2 of described roadbed side slope Vierendeel girder anchor pole 10.By cooperatively interacting of described " V " type through hole and intermediate plate 11 inclined-plane 11-1, and jacking system 2 drives in the process of moving on anchor slab 4, the dynamics of holding that adds of 11 pairs of roadbed side slope framework beam anchor poles 10 of intermediate plate increases gradually, can guarantee 11 pairs of good clamping dynamics of described roadbed side slope Vierendeel girder anchor pole 10 of intermediate plate.Due to cooperatively interacting of described " V " type through hole and intermediate plate 11 inclined-plane 11-1, and described inclined-plane 11-1 and vertically the angle α between clamping face 11-2 be 15 °～20 °, can be after jacking system 2 unloadings, anchor slab 4 and intermediate plate 11 can Automatic-fallings.In the present embodiment, preferred way is that described inclined-plane 11-1 and the vertically angle between clamping face 11-2 are 17.5 °.
As shown in Figure 5, described vertical clamping face 11-2 is matsurface.Further guaranteed the clamping effect of 11 pairs of roadbed side slope framework beam anchor poles 10 of intermediate plate.
As shown in Figure 3 and Figure 4, described anchor slab 4 integral body are square.
As shown in Figure 8, at least two roller 3-3-2 that roll and coordinate with described jacking system 2 outer walls are installed on the cell wall of described arc groove 3-3-1.On described base plate 3-3, offer for described roadbed side slope Vierendeel girder anchor pole 10 and stretch into the 3rd opening 3-3-3 that anchor pole button pulls out frame 3.When jacking system 2 drives anchor pole buttons to pull out frame 3 to move, in order to improve the utilization rate of jacking system 2 power outputs, avoid the frictional force between jacking system 2 and arc groove 3-3-1 cell wall, by roller 3-3-2 is set, making jacking system 2 and arc groove 3-3-1 cell wall be rolling coordinates, improve the utilization rate of jacking system 2 power outputs, and improved the service efficiency of this drawing instrument.
As shown in Figure 1, this roadbed side slope Vierendeel girder anchor rod drawing instrument also comprises for measuring the creep measurement mechanism of described roadbed side slope Vierendeel girder anchor pole 10 displacements.Described creep measurement mechanism comprises dial gage 7, dial framework 9 and creep measurement plate 5, described creep measurement plate 5 is connected on described roadbed side slope Vierendeel girder anchor pole 10 by geometrical clamp 6, concrete, described creep measurement plate 5 is connected on the parallel-segment 10-2 of roadbed side slope Vierendeel girder anchor pole 10 by geometrical clamp 6, described dial gage 7 is arranged on dial framework 9, the gauge head 7-1 of described dial gage 7 is connected on creep measurement plate 5, and described dial framework 9 is supported on roadbed side slope 12.Concrete, on described roadbed side slope 12, be provided with for supporting the gripper shoe 8 of dial framework 9.
In the present embodiment, by creep measurement mechanism, the displacement situation in the time of can accurately measuring 10 drawing of roadbed side slope Vierendeel girder anchor pole, has solved anchor rod drawing test and has only surveyed pulling force, situation that can not displacement.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure transformation of above embodiment being done according to the technology of the present invention essence, all still belongs in the protection domain of technical solution of the present invention.
Claims (10)
1. roadbed side slope Vierendeel girder anchor rod drawing instrument, is characterized in that: comprise that jacking system (2), anchor pole button pull out frame (3) and anchor slab (4); The fixed end of described jacking system (2) is connected on roadbed side slope (12), the mobile terminal of described jacking system (2) is pulled out frame (3) with anchor pole button and is connected, described anchor slab (4) is arranged on anchor pole button and pulls out in frame (3), on described anchor slab (4), offer for roadbed side slope Vierendeel girder anchor pole (10), pass clamp hole (4-1), described in clamp in hole (4-1) and be provided with two for clamping the intermediate plate (11) of described roadbed side slope Vierendeel girder anchor pole (10).
2. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 1, it is characterized in that: comprise counter-force base (1), it is upper that the fixed end of described jacking system (2) is connected to roadbed side slope (12) by counter-force base (1), offers for roadbed side slope Vierendeel girder anchor pole (10) and stretch into the first opening (1-1) that anchor pole button pulls out frame (3) on described counter-force base (1).
3. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 1, is characterized in that: on described anchor slab (4), offer with described and clamp the second opening (4-2) that hole (4-1) is connected.
4. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 1, it is characterized in that: described in clamp hole (4-1) for " V " type through hole, two described intermediate plates (11) include and clamp inclined-plane (11-1) that hole (4-1) hole wall matches and for clamping the vertical clamping face (11-2) of described roadbed side slope Vierendeel girder anchor pole (10), described inclined-plane (11-1) and the vertically angle between clamping face (11-2) are 15 °～20 °.
5. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 4, is characterized in that: described vertical clamping face (11-2) is matsurface.
6. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 1, is characterized in that: described anchor pole button pulls out that frame (3) comprises top board (3-1), base plate (3-3) and for connecting two side plates (3-2) of top board (3-1) and base plate (3-3); On described top board (3-1), offer the link slot (3-1-1) stretching into for jacking system (2) mobile terminal; On described base plate (3-3), offer the arc groove (3-3-1) suitable with jacking system (2) outer wall, described anchor slab (4) is placed on described base plate (3-3).
7. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 6, is characterized in that: at least two rollers (3-3-2) that roll and coordinate with described jacking system (2) outer wall are installed on the cell wall of described arc groove (3-3-1).
8. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 1, is characterized in that: comprise for measuring the creep measurement mechanism of described roadbed side slope Vierendeel girder anchor pole (10) displacement.
9. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 8, it is characterized in that: described creep measurement mechanism comprises dial gage (7), dial framework (9) and creep measurement plate (5), described creep measurement plate (5) is connected on described roadbed side slope Vierendeel girder anchor pole (10) by geometrical clamp (6), described dial gage (7) is arranged on dial framework (9), it is upper that the gauge head (7-1) of described dial gage (7) is connected to creep measurement plate (5), and described dial framework (9) is supported on roadbed side slope (12).
10. roadbed side slope Vierendeel girder anchor rod drawing instrument according to claim 1, is characterized in that: described anchor slab (4) integral body is square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410058185.1A CN103758162B (en) | 2014-02-20 | 2014-02-20 | Roadbed slope frame girder anchor rod drawing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410058185.1A CN103758162B (en) | 2014-02-20 | 2014-02-20 | Roadbed slope frame girder anchor rod drawing instrument |
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| Publication Number | Publication Date |
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| CN103758162A true CN103758162A (en) | 2014-04-30 |
| CN103758162B CN103758162B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410058185.1A Active CN103758162B (en) | 2014-02-20 | 2014-02-20 | Roadbed slope frame girder anchor rod drawing instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579657A (en) * | 2019-01-10 | 2019-04-05 | 杭州市电力设计院有限公司 | A kind of slope displacement monitoring device and monitoring method |
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| JP2011117172A (en) * | 2009-12-02 | 2011-06-16 | Shimizu Corp | Method for checking end bearing capacity of cast-in-place pile |
| CN102108703A (en) * | 2010-12-20 | 2011-06-29 | 中铁隧道集团有限公司 | Adjustable prestressed anchoring device |
| CN202882961U (en) * | 2012-10-24 | 2013-04-17 | 西安科技大学 | Anchor rod tension force detection and pre-tightened integration device |
| CN103510552A (en) * | 2013-10-12 | 2014-01-15 | 青岛理工大学 | Nonmetal anti-floating anchor rod creep test loading device |
| CN203701161U (en) * | 2014-02-20 | 2014-07-09 | 中铁一局集团有限公司 | Roadbed slope frame beam anchor rod drawing instrument |
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2014
- 2014-02-20 CN CN201410058185.1A patent/CN103758162B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011117172A (en) * | 2009-12-02 | 2011-06-16 | Shimizu Corp | Method for checking end bearing capacity of cast-in-place pile |
| CN102108703A (en) * | 2010-12-20 | 2011-06-29 | 中铁隧道集团有限公司 | Adjustable prestressed anchoring device |
| CN202882961U (en) * | 2012-10-24 | 2013-04-17 | 西安科技大学 | Anchor rod tension force detection and pre-tightened integration device |
| CN103510552A (en) * | 2013-10-12 | 2014-01-15 | 青岛理工大学 | Nonmetal anti-floating anchor rod creep test loading device |
| CN203701161U (en) * | 2014-02-20 | 2014-07-09 | 中铁一局集团有限公司 | Roadbed slope frame beam anchor rod drawing instrument |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109579657A (en) * | 2019-01-10 | 2019-04-05 | 杭州市电力设计院有限公司 | A kind of slope displacement monitoring device and monitoring method |
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| CN103758162B (en) | 2015-07-08 |
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Inventor after: He Anhui Inventor after: Shen Baidun Inventor after: Wu Zhanjie Inventor after: Li Changning Inventor after: Lei Xiangfeng Inventor after: Huang Yuanyuan Inventor after: Yan Xuewu Inventor after: Guo Cunlin Inventor before: He Anhui Inventor before: Li Changning Inventor before: Lei Xiangfeng Inventor before: Shen Baidun Inventor before: Huang Yuanyuan Inventor before: Yan Xuewu Inventor before: Guo Cunlin |
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Free format text: CORRECT: INVENTOR; FROM: HE ANHUI LI CHANGNING LEI XIANGFENG SHEN BAIDUN HUANG YUANYUAN YAN XUEWU GUO CUNLIN TO: HE ANHUI SHEN BAIDUN WU ZHANJIE LI CHANGNING LEI XIANGFENG HUANG YUANYUAN YAN XUEWU GUO CUNLIN |
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Effective date of registration: 20170104 Address after: The northern section of Shaanxi city of Xi'an province 710054 Yanta Road No. 1 Patentee after: China Railway First Engineering Co., Ltd. Patentee after: China Railway first group construction and Installation Engineering Co., Ltd. Address before: The northern section of Shaanxi city of Xi'an province 710054 Yanta Road No. 1 Patentee before: China Railway First Engineering Co., Ltd. |