CN106592449A - D-shaped beam reinforced existing double-railway line structure and construction method thereof - Google Patents
D-shaped beam reinforced existing double-railway line structure and construction method thereof Download PDFInfo
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- CN106592449A CN106592449A CN201611199284.7A CN201611199284A CN106592449A CN 106592449 A CN106592449 A CN 106592449A CN 201611199284 A CN201611199284 A CN 201611199284A CN 106592449 A CN106592449 A CN 106592449A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention discloses a D-shaped beam reinforced existing double-railway line structure and a construction method thereof. The structure comprises buttresses, D-shaped longitudinal beams and D-shaped cross beams, wherein the buttresses include at least two rows of left buttresses, middle buttresses and right buttresses; all the left buttresses, middle buttresses and right buttresses are respectively fixed with the D-shaped longitudinal beams; a plurality of D-shaped cross beams, are connected between the two adjacent D-shaped longitudinal beams; the D-shaped cross beams are located under line steel rails. The method comprises the steps of releasing the stress, buckling the rails and binding the beams, pouring the buttresses and erecting the D-shaped beams. Compared with the prior art, the D-shaped beam reinforced existing double-railway line structure has the advantages that only one D-shaped longitudinal beam is erected between the two railway lines, the D-shaped longitudinal beam between the two railway lines is shared by the D-shaped cross beams of the two railway lines and the distances between the D-shaped longitudinal beam and the rails of the two lateral lines are farther, so that the limit intrusion can be avoided, the rain operation safety in the railway reconstruction period can be guaranteed, the construction materials and the construction period can be saved and the construction cost can be lowered.
Description
Technical field
The present invention relates to a kind of railway construction engineering construction field, more particularly to a kind of D types beam reinforces existing two-wire circuit
Structure and construction method.
Background technology
Original level crossing Chang Yu highways are arranged in a crossed manner, and train needs to slow down when intersection, and is susceptible to
Accident, affects train operation, while according to national policy, train operation needs the arrangement of speed-raising, original railway crossing to limit
Train speed raising, reduces conevying efficiency, there is larger potential safety hazard, to circuit stablizes unfavorable, therefore according to Along Railway
Landform part highway wears existing railway line under needing, but reconstruction project can not affect the normal operation of railway, and underground again
Passage also needs to the waterproof layer of construction outer wall and top surface.Because circuit normal operation, train are as usual current, circuit can not be removed,
Accordingly, it would be desirable to original railway reinforced is supported, then jacking framed bridge is excavated below railway, finally remove reinforcing support member extensive
Multiple line road.
Track strengthening is the core of guarantee driving safety in bridges and culverts jacking operation, and rational Scheme of Strengthening is to ensure that row
The important leverage of car safety, carries out reinforcing the two-wire for being usually applicable only to single-track railway and more than distance between centers of tracks 4.86m using D types beam
Railway, when the distance between centers of tracks of double track railway is less than 4.86m, it is impossible to meet the railroad clearance requirement that the standard of GB specifies,
Railway safe driving is impacted, or causes railway broken string, interruption of train operation, or even great Railway Running Accidents occur, according to
Railway Design specification, the distance between centers of tracks of China's existing railway is generally AT STATION 5.0m, and interval 4-4.5m, therefore big portion are generally
Two-wire location is divided to adopt D type beam hardened links；According to beam hardened link in length and breadth, then construction period is longer, needs artificial
Borehole depth is deeper, and rich groundwater, uncontrollable factor is more, and potential safety hazard is big, high cost.
The content of the invention
It is an object of the invention to overcome the double track railway of existing below distance between centers of tracks 4.86m cannot be reinforced using D types beam,
It is longer using beam hardened link construction period in length and breadth, the above-mentioned deficiency such as big cost height of potential safety hazard, there is provided a kind of D types beam is reinforced both
There are two-wire circuit structure and construction method, the double track railway of below distance between centers of tracks 4.86m is reinforced using D types beam, it is to avoid the construction time
Between cause to invade limit, reduce construction period, improve the safety of work progress, it is cost-effective.
To achieve these goals, the invention provides technical scheme below：
A kind of D types beam reinforces existing two-wire circuit structure, and comprising buttress, D type beam longerons and D type beam crossbeams, the buttress is at least
There are two rows, often arrange comprising left side buttress, middle buttress and right side buttress, all left side buttresses distinguish position with right side buttress
In two lines road both sides, all middle buttresses are located between two circuits, all left side buttresses, middle buttress
It is each with the buttress of right side to fix a D type beam longeron, some D types beams are connected between adjacent two D types beam longerons horizontal
Beam, the D types beam crossbeam is located at circuit rail lower section.
Existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, comprising buttress at least described in two rows, often
Comprising left side buttress, middle buttress and right side buttress, all left side buttresses are located at respectively two lines to row with right side buttress
Road both sides, all middle buttresses are located between two circuits, and all left side buttresses are provided with a D type
Beam longeron, all right side buttresses are provided with a D types beam longeron, and on all middle buttresses an institute is provided only with
D type beam longerons are stated, between adjacent two D types beam longerons some D type beam crossbeams are connected with, the D types beam crossbeam is located at
The circuit rail lower section, is interspersed between sleeper, and the D types beam crossbeam is used to stably support rail, ensures subsequent construction mistake
Cheng Zhong, railway may continue to operation, it is to avoid stop transport, the D types when the distance between centers of tracks between two-wire circuit is less, between two-wire
Beam longeron is limited apart from the position of rail, and prior art sets up two D types beam longerons between two lines road, therefore
Per D types beam longeron described in root than only arranging a D types beam longeron closer to rail, the top of the D types beam longeron will
Cause to invade limit, cause withdrawal of train, affect safety of railway traffic, only set up described in one between two lines road using this structure
D type beam longerons, i.e., described D types beam longeron is farther apart from the distance of both sides railway, can keep safe distance with train, it is to avoid apply
Cause to invade limit between the duration, improve the safety of railway traffic of work progress, reduce construction period, save construction cost, it is especially suitable
Engineering of the discrepancy in elevation between two-wire circuit within 80cm.
Preferably, the buttress has two rows, and the left side buttress, middle buttress and right side buttress are located at respectively corresponding institute
State the end of D type beam longerons.
The buttress has under the both ends of the D types beam longeron on the left of the circuit of two rows, i.e., two and respectively has an institute
Left side buttress is stated, respectively there is a right side buttress under the both ends of the D types beam longeron on the right side of two circuits, two
Respectively there is a middle buttress under the both ends of the D types beam longeron between the circuit.
Preferably, the left side buttress and right side buttress are located on the roadbed curb of two circuit both sides, it is described in
Between buttress be located at two circuits between roadbed on.
Preferably, the D types beam crossbeam and D type beam longerons junction are respectively fixedly connected with up and down bracket with lower cattle
Lower limb, the upper bracket is fixedly connected with lower bracket with the D types beam longeron.
The upper bracket is fixedly connected with lower bracket with the D types beam crossbeam and D type beam longerons, keeps supporting more steady
It is fixed.
It is further preferred that height of the height of the upper bracket less than the lower bracket.
Using above-mentioned arrangement, the stress performance of the D types beam crossbeam is further improved, be conducive to described in stable fixation
D type beam crossbeams, the height of the upper bracket is less than the height of the lower bracket, and making the antenna height of the D types beam crossbeam increases,
The D types beam longeron is further avoided to invade limit.
Preferably, two D types beam longerons on the left side buttress and right side buttress are respectively parallel to correspondence
The track of the circuit.
Using above-mentioned arrangement, be conducive to saving the length of the D types beam crossbeam, reduce engineering cost.
Present invention also offers a kind of D types beam reinforces the construction method of existing two-wire circuit structure, including using as described above
A kind of arbitrary described D types beam reinforces existing two-wire circuit structure, and its construction method is comprised the following steps：
A, destressing, determine the region of stress concentration of circuit near construction area, and to the region destressing is carried out；
B, button rail beam, rail beam is connected on the circuit；
C, pour buttress, pour respectively between the both sides of two circuits and two circuits the left side buttress, in
Between buttress and right side buttress, pour and remove after finishing the rail beam；
D, erection D type beam crossbeams, set up some D type beam crossbeams below the rail per circuit described in bar；
E, erection D type beam longerons, on all left side buttresses, middle buttress and right side buttress a D type is respectively set up
Beam longeron, and be fixedly connected with all D types beam crossbeams, complete reinforcement by connection.
The construction method of existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, due to existing line
In life-time service, affected by temperature, train braking or clamping force etc. affect, and produce creeping for rail, receive part rail
Extruding and part rail is reeled and stretched, so as to produce stress concentration, there is the danger of rail expansion the part of stress concentration, causes work progress
In easily cause brittle fractures of rail, therefore determine the region of stress concentration and destressing on two lines road according to the numerical value of monitoring first
Mode, after completing destressing, rail beam is connected on the sleeper under the circuit, by stabilization zone homonymy sleeper connect
Integral, it is to avoid in whole reinforcing process, train still keeps low cruise to cause sleeper deformation, damage, while adjusting institute
The spacing between sleeper is stated, to be subsequently inserted into D type beam crossbeams, pouring for the buttress is carried out, is poured and removed after finishing
The rail beam, sets up the D types beam crossbeam, and some D type beam crossbeams, i.e. institute are set up below the rail per circuit described in bar
D type beam crossbeams and sleeper arranged for interval are stated, it is then each on all left side buttresses, middle buttress and right side buttress to set up one
D types beam longeron described in root, and be fixedly connected with all D types beam crossbeams, due to double track railway, described between two-wire
D type beam longerons are limited apart from the position of rail, when two-wire circuit distance between centers of tracks is less than 4.86m, due to the D types beam crossbeam
Antenna height it is shorter, i.e., the level of the line track of D types beam cross beam support relative to the D types beam longeron top
It is relatively low, easily cause and invade limit, in prior art between two-wire circuit set up two D type beam longerons, two D types beam longerons from
Rail is closer to the distance, train by when be susceptible to invade limit, safety of railway traffic is affected, compared to prior art, at two
A D type beam longeron is set up between the circuit, i.e., sets up three D type beam longerons altogether, the D types beam of two circuits is horizontal
Beam shares the D type beam longerons between two-wire circuit, makes the D types beam longeron farther apart from the orbital distance of both sides circuit, it is to avoid
Limit is invaded, the train operating safety of double tracking railways construction period is ensured, construction material and duration is saved, construction cost is reduced.
Preferably, in step d, when the D types beam crossbeam is installed, insulation processing is first carried out.
When the D types beam crossbeam is installed, insulation processing is first carried out, such as pad insulation rubber cushion, prevent track circuit connection electricity, caused
Security incident.
Preferably, start before step e, the intensity of the buttress reaches the 100% of design strength.
D type beam longerons and D type beam crossbeams are being installed, railway suspends train operation, is train energy after guarantee is installed
Enough to resume operation as early as possible, the intensity of the buttress reaches design strength 100%, then installs D type beam longerons, advantageously reduces train
The time of operation suspension.
Preferably, in step e, pacify with below the position being connected per D types beam crossbeam described in root on the D types beam longeron
Bracket is loaded, bracket is installed in corresponding position above the position connected with the D types beam crossbeam.
After being fixedly connected with the D types beam longeron per D types beam crossbeam described in root, using relative described upper bracket with
Bracket is fixedly connected with the D types beam crossbeam with the D types beam longeron jointly, horizontal by D types beam described in the lower bracket supports
Beam, and the D types beam crossbeam is fixed jointly with two relative upper brackets, it is ensured that during construction reformation, the D types beam
Crossbeam can stably support the rail, ensure train operating safety.
Preferably, in step e, the pre-buried rail pile at the top of each described buttress.
The pre-buried rail pile at the top of each described buttress, after the D types beam longeron install it is in place after in time with pre-buried rail
Stake is connected firmly, and limits the D types beam longeron and vertically moves.
In sum, compared with prior art, the invention has the beneficial effects as follows：
1st, existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, one is only set up between two lines road
The D types beam longeron, i.e., described D types beam longeron is farther apart from the distance of both sides railway, can keep safe distance with train, keeps away
Exempt from construction period to cause to invade limit, improve the safety of railway traffic of work progress, reduce construction period, save construction cost, especially
Suitable for engineering of the discrepancy in elevation between two-wire circuit within 80cm.
2nd, existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, is conducive to the stable fixation D types
Beam crossbeam, the height of the upper bracket is less than the height of the lower bracket, and making the antenna height of the D types beam crossbeam increases, and enters
One step avoids the D types beam longeron from invading limit.
3rd, the construction method of existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, compared to existing
Technology, sets up a D type beam longeron between two circuits, i.e., set up three D type beam longerons altogether, two circuits
The D types beam crossbeam share two-wire circuit between D type beam longerons, make the D types beam longeron apart from both sides circuit track away from
From farther, it is to avoid invade limit, the train operating safety of double tracking railways construction period is ensured, save construction material and duration, reduce applying
Work cost.
4th, the construction method of existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, the D types is installed
During beam crossbeam, insulation processing is first carried out, such as pad insulation rubber cushion, prevent track circuit connection electricity, cause security incident.
5th, the construction method of existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, D type beams is being installed
Longeron and D type beam crossbeams, railway suspends train operation, is that after guarantee is installed, train can resume operation as early as possible, described
The intensity of buttress reaches design strength 100%, then installs D type beam longerons, advantageously reduces the time of train operation suspension.
6th, the construction method of existing two-wire circuit structure is reinforced using a kind of D types beam of the present invention, will be per D described in root
After type beam crossbeam is fixedly connected with the D types beam longeron, using relative described upper bracket and lower bracket jointly with the D types beam
Crossbeam is fixedly connected with the D types beam longeron, by D types beam crossbeam described in the lower bracket supports, and with two relative institutes
State bracket and fix the D types beam crossbeam jointly, it is ensured that during construction reformation, the D types beam crossbeam can stably support institute
Rail is stated, train operating safety is ensured.
Description of the drawings
Fig. 1 is the structural representation that a kind of D types beam of the present invention reinforces existing two-wire circuit structure.
Fig. 2 is the structure top view that a kind of D types beam of the present invention reinforces existing two-wire circuit structure.
Fig. 3 is the construction procedure figure of the construction method that a kind of D types beam of the present invention reinforces existing two-wire circuit structure.
Labelling in figure：11- left sides buttress, buttress in the middle of 12-, 13- right sides buttress, 2- D type beam longerons, 3- D types beam is horizontal
Beam, the upper brackets of 41-, bracket under 42-, 5- underpass.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.But this should not be interpreted as this
The scope for inventing above-mentioned theme is only limitted to below example, and all technologies realized based on present invention belong to the present invention
Scope.
Embodiment 1
As shown in Figure 1-2, a kind of D types beam of the present invention reinforces existing two-wire circuit structure, comprising buttress, D type beams longeron 2
With D type beams crossbeam 3, the buttress has two rows, and often row includes a left side buttress 11, middle buttress 12 and right side buttress 13, institute
State left side buttress 11 and right side buttress 13 is located on the roadbed curb of two circuit both sides, the middle buttress 12 is located at two
It is each on two the left side buttresses 11, middle buttress 12 and right side buttresses 13 to fix a D on roadbed described in bar between circuit
Type beam longeron 2, the left side buttress 11, middle buttress 12 and right side buttress 13 are respectively positioned at the corresponding D types beam longeron 2
End, the D types beam longeron 2 of two on the left side buttress 11 and right side buttress 13 is respectively parallel to the correspondence line
The track on road, between adjacent two D types beam longerons 2 some D type beams crossbeams 3 are connected with, and the D types beam crossbeam 3 is located at
The circuit rail lower section, is interspersed between sleeper, is underpass 5 yet to be built below the D types beam crossbeam 3, the D types beam
Crossbeam 3 is respectively fixedly connected with up and down bracket 41 and lower bracket 42 with the junction of D type beams longeron 2, and the upper bracket 41 is with
Bracket 42 is fixedly connected with the D types beam longeron 2, and the height of the upper bracket 41 is less than the height of the lower bracket 42.
Embodiment 2
As shown in figure 3, a kind of D types beam reinforces the construction method of existing two-wire circuit structure, including using as described in example 1 above
A kind of D types beam reinforce existing two-wire circuit structure, its construction method is comprised the following steps：
Step one, destressing, determine the region of stress concentration of circuit near construction area, carry out stress to the region and put
Dissipate；
Step 2, button rail beam, rail beam is connected on the circuit；
Step 3, buttress is poured, pour the left side respectively between the both sides of two circuits and two circuits
Pier 11, middle buttress 12 and right side buttress 13, pour and remove after finishing the rail beam；
Step 4, erection D type beams crossbeam 3, set up some D types beam crossbeams 3 below the rail per circuit described in bar；
Step 5, erection D type beams longeron 2, respectively set up on all left side buttresses 11, middle buttress 12 and right side buttress 13
A piece D types beam longeron 2, and be fixedly connected with all D types beam crossbeams 3, complete reinforcement by connection.
First the construction part of the existing two-wire circuit to needing reinforcement is monitored, and according to the numerical value of monitoring two lines are determined
The region of stress concentration on road and the mode of destressing, after completing destressing, by rail beam the pillow under the circuit are connected to
On wood, the sleeper of homonymy in stabilization zone is linked to be into entirety, while the spacing between the sleeper is adjusted, to be subsequently inserted into
D type beams crossbeam 3, then carries out pouring for the buttress, and in the outside of two circuits the left side buttress 11 is poured respectively
With right side buttress 13, the middle buttress 12 is poured between two circuits, pour and remove after finishing the rail beam, so
After set up the D types beam crossbeam 3, when the D types beam crossbeam 3 is installed, first felt pad is installed below rail, per line described in bar
The rail lower section on road sets up some D type beams crossbeams 3, i.e., described D types beam crossbeam and sleeper arranged for interval, and the line is supported jointly
The rail on road, then respectively sets up a D types beam on all left side buttresses 11, middle buttress 12 and right side buttress 13
Longeron 2, and be fixedly connected with all D types beam crossbeams 3, it is then horizontal with per D types beam described in root on the D types beam longeron 2
Lower bracket 42 is installed in the position lower section of the connection of beam 3, and corresponding position is installed above the position connected with the D types beam crossbeam
Bracket 41, all upper brackets 41 are fixedly connected with lower bracket 42 with the D types beam longeron 2 with D type beams crossbeam 3, realize
It is stable to support, the reinforcing to existing two-wire circuit is completed, while avoiding that existing railway is caused to invade limit, construction underground is effectively ensured
The operation of the construction period train of passage 5 is not interrupted, and saves construction period and cost.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of D types beam reinforces existing two-wire circuit structure, it is characterised in that horizontal with D types beam comprising buttress, D types beam longeron (2)
Beam (3), the buttress at least two rows are often arranged comprising left side buttress (11), middle buttress (12) and right side buttress (13), institute
There is the left side buttress (11) to be located at two lines road both sides respectively with right side buttress (13), all middle buttresses (12) are located at
It is each on all left side buttresses (11), middle buttress (12) and right side buttress (13) to fix a D between two circuits
Type beam longeron (2), is connected with some D types beam crossbeam (3) between adjacent two D types beam longerons (2), the D types beam is horizontal
Beam (3) is positioned at circuit rail lower section.
2. a kind of D types beam according to claim 1 reinforces existing two-wire circuit structure, it is characterised in that the buttress has
Two rows, the left side buttress (11), middle buttress (12) and right side buttress (13) are located at respectively the corresponding D types beam longeron
(2) end.
3. a kind of D types beam according to claim 1 and 2 reinforces existing two-wire circuit structure, it is characterised in that the left side
On the roadbed curb of two circuit both sides, the middle buttress (12) is positioned at two for buttress (11) and right side buttress (13)
On roadbed described in bar between circuit.
4. a kind of D types beam according to claim 1 and 2 reinforces existing two-wire circuit structure, it is characterised in that the D types
Beam crossbeam (3) and D types beam longeron (2) junction are respectively fixedly connected with up and down bracket (41) and lower bracket (42), it is described on
Bracket (41) is fixedly connected with lower bracket (42) with the D types beam longeron (2).
5. a kind of D types beam according to claim 4 reinforces existing two-wire circuit structure, it is characterised in that the upper bracket
(41) height of the height less than the lower bracket (42).
6. a kind of D types beam according to claim 1 and 2 reinforces existing two-wire circuit structure, it is characterised in that positioned at described
Two D types beam longerons (2) on left side buttress (11) and right side buttress (13) are respectively parallel to the rail of the correspondence circuit
Road.
7. a kind of D types beam reinforces the construction method of existing two-wire circuit structure, it is characterised in that including will using such as above-mentioned right
A kind of arbitrary described D types beams of 1-6 are asked to reinforce existing two-wire circuit structure, its construction method is comprised the following steps：
A, destressing, determine the region of stress concentration of circuit near construction area, and to the region destressing is carried out；
B, button rail beam, rail beam is connected on the circuit；
C, buttress is poured, pour the left side buttress respectively between the both sides of two circuits and two circuits
(11), middle buttress (12) and right side buttress (13), pour and remove after finishing the rail beam；
D, erection D types beam crossbeam (3), set up some D types beam crossbeams (3) below the rail per circuit described in bar；
E, erection D types beam longeron (2), it is each on all left side buttresses (11), middle buttress (12) and right side buttress (13)
A D types beam longeron (2) is set up, and is fixedly connected with all D types beam crossbeams (3), complete reinforcement by connection.
8. a kind of D types beam according to claim 7 reinforces the construction method of existing two-wire circuit structure, it is characterised in that
In step d, when D types beam crossbeam (3) are installed, insulation processing is first carried out.
9. a kind of D types beam according to claim 7 reinforces the construction method of existing two-wire circuit structure, it is characterised in that
Before starting step e, the intensity of the buttress reaches the 100% of design strength.
10. a kind of D types beam according to claim 7 reinforces the construction method of existing two-wire circuit structure, it is characterised in that
In step e, bracket under installing with the position lower section being connected per D types beam crossbeam (3) described in root on the D types beam longeron (2)
(42), bracket (41) is installed in position corresponding with the position top that the D types beam crossbeam (3) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199284.7A CN106592449A (en) | 2016-12-22 | 2016-12-22 | D-shaped beam reinforced existing double-railway line structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199284.7A CN106592449A (en) | 2016-12-22 | 2016-12-22 | D-shaped beam reinforced existing double-railway line structure and construction method thereof |
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| CN108166336A (en) * | 2018-01-12 | 2018-06-15 | 中铁六局集团有限公司 | A kind of I-steel in length and breadth and D beams combined system reinforce the construction method of switch area |
| CN108203900A (en) * | 2018-02-09 | 2018-06-26 | 北京交通大学 | A kind of cross-saddle single-track traffic radial type two-orbit beam |
| CN110374018A (en) * | 2019-06-17 | 2019-10-25 | 中铁六局集团呼和浩特铁路建设有限公司 | A kind of combined steel cross bearer sets up multispan just beam track strengthening method |
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| CN108166336A (en) * | 2018-01-12 | 2018-06-15 | 中铁六局集团有限公司 | A kind of I-steel in length and breadth and D beams combined system reinforce the construction method of switch area |
| CN108203900A (en) * | 2018-02-09 | 2018-06-26 | 北京交通大学 | A kind of cross-saddle single-track traffic radial type two-orbit beam |
| CN110374018A (en) * | 2019-06-17 | 2019-10-25 | 中铁六局集团呼和浩特铁路建设有限公司 | A kind of combined steel cross bearer sets up multispan just beam track strengthening method |
| CN110965475A (en) * | 2019-12-13 | 2020-04-07 | 中铁大桥局第七工程有限公司 | Installation method of steel frame beam segment with main cross beam in span and steel frame beam |
| CN110965475B (en) * | 2019-12-13 | 2021-08-10 | 中铁大桥局第七工程有限公司 | Installation method of steel frame beam segment with main cross beam in span and steel frame beam |
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