CN114945491A - Construction method for temporarily positioning contact net at unfavorable terrain - Google Patents
Construction method for temporarily positioning contact net at unfavorable terrain Download PDFInfo
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- CN114945491A CN114945491A CN202080039504.8A CN202080039504A CN114945491A CN 114945491 A CN114945491 A CN 114945491A CN 202080039504 A CN202080039504 A CN 202080039504A CN 114945491 A CN114945491 A CN 114945491A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
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- B60M1/28—Manufacturing or repairing trolley lines
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Abstract
A construction method for temporarily positioning a contact net at an unfavorable terrain comprises the steps of site pile crossing and measurement, calculation and prefabrication of an auxiliary rope (6), calculation and prefabrication of a transverse stay rope (1), excavation and backfilling of a stay wire pit, and site installation and adjustment. The temporary auxiliary cable (6) is adopted to fix the transverse cable (1), and the transverse cable (1) is used to fix the contact net, so that anchor bolts are prevented from being drilled and implanted in existing bridges, steel columns are prevented from being installed, and damage to existing bridges is avoided; the positioning point for transversely adjusting the contact net above the frame bridge is determined through early-stage measurement and calculation, so that the construction links are reduced, and the accuracy of the positioning point for transversely adjusting is improved; the adopted method is simple, convenient and practical, and the construction efficiency is improved; the laser measuring instrument of the contact net is used for measuring the pull-out value of the transverse adjusting positioning point of the contact net, and the transverse cable (1) can be adjusted by the adjusting mechanism, so that the technical parameters of the contact net line fork on the bridge can meet the requirements.
Description
The invention belongs to the technical field of electrified railway contact network construction, and particularly relates to a construction method for temporarily positioning a contact network at an unfavorable terrain.
The contact net is a large system, which comprises a support column, a foundation, a supporting device, a contact suspension device, a grounding and refluxing device and the like, wherein the contact suspension device comprises a catenary, a contact wire, a dropper and related parts, the upper end of the dropper is connected with the catenary, and the lower end of the dropper is connected with the contact wire to play a role of suspending the contact wire. The positioning of the contact net refers to the positioning of the carrier cable and the contact line.
In the reconstruction of the existing electrified railway station, the turnouts in throat areas are more, construction of skylight is needed, the throat areas at two ends of a station have more existing lower frame-through bridges, the bridge is difficult to avoid inserting temporary turnouts in the bridge floor for transition construction, and the contact network above the turnouts needs synchronous transition construction.
In the prior construction, a group of large-span special-shaped transition hard cross beams are often erected along the railway line direction across a bridge, and then transition wrists are installed on the hard cross beams to position contact nets.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a construction method for temporarily positioning a contact net at an unfavorable terrain, so as to solve or alleviate the problems in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a construction method for temporarily positioning a contact net at an unfavorable terrain, which comprises the following steps:
step S1, pile crossing and measurement on site:
confirm and carry out the handing over stake with the interim switch position that the contact net circuit corresponds, wherein, interim switch position includes: a fork head, a fork core and a fork tail;
respectively measuring the first support side surface limit and the second support side surface limit of two supports on the same side in a circuit of the contact network;
respectively measuring a first vertical distance and a second vertical distance from the fork center to the outer edges of the two support columns;
measuring the distance from the fork head to the fork center and the distance from the fork center to the fork tail;
step S2, calculating and prefabricating an auxiliary cable:
calculating the total length of the auxiliary rope according to the first vertical distance and the second vertical distance in the step S1;
prefabricating the auxiliary cable according to the calculated total length of the auxiliary cable;
step S3, calculating and prefabricating a transverse stay:
calculating the prefabricated total length of the transverse inhaul cable, and prefabricating the transverse inhaul cable according to the calculation result;
determining the installation position of a transverse inhaul cable according to a turnout positioning table;
step S4, digging and backfilling a wire drawing pit:
digging wire drawing pits on the outer sides of the two supporting columns respectively;
installing an anchor plate and a stay bar in the stay wire pit, and backfilling the stay wire pit;
step S5, field installation and adjustment:
installing anchor angle steel and temporary stay wires: in the skylight operation time, lower anchor angle steel and temporary stay wires are respectively arranged on the two pillars;
installing one end of a transverse inhaul cable: according to the determined installation position of the transverse cable in the step S3, one end of the transverse cable is connected with the auxiliary cable through a suspension wire clamp;
installing an auxiliary rope: two ends of the auxiliary cable are respectively connected with lower anchor angle steel arranged on the two pillars;
installing the other end of the transverse inhaul cable: the other end of the transverse guy cable is connected with the contact net, the connecting point of the transverse guy cable and the contact net is a transverse adjusting locating point of the contact net, an adjusting mechanism is arranged on the transverse guy cable, and the pull-out value of the transverse adjusting locating point of the contact net is controlled by adjusting the length of the adjusting mechanism.
Compared with the closest prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
1. according to the invention, the transverse inhaul cable is fixed by adopting the auxiliary cable, and the contact net is fixed by the transverse inhaul cable, so that the anchor bolts are prevented from being implanted into the existing bridge through drilling, steel columns are prevented from being installed, and the existing bridge is prevented from being damaged;
2. the transverse adjusting positioning point of the overhead line system above the frame bridge is determined through early-stage measurement and calculation, so that construction links are reduced, and the accuracy of the transverse adjusting positioning point is improved;
3. the adopted method is simple, convenient and practical, and the construction efficiency is improved;
4. the pull-out value of the positioning point of the transverse adjustment of the contact net is measured by using the contact net laser measuring instrument to compare, and the adjustment mechanism on the transverse inhaul cable can be used for adjusting when the requirement is not met, so that the technical parameters of the contact net line fork on the bridge can meet the requirement.
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic diagram of the circuit layout of the present invention;
FIG. 2 is a detailed view of the auxiliary cable of FIG. 1;
FIG. 3 is a detailed structural view of the transverse cable of FIG. 2;
fig. 4 is a detail view of the connection point of the transverse stay cable and the messenger cable of fig. 3;
FIG. 5 is a construction roadmap for the present invention;
FIG. 6 is a switch location table;
FIG. 7 is a schematic structural view of a double transverse cable of embodiment 2;
fig. 8 is a schematic structural view of a double auxiliary rope according to embodiment 2.
Description of the reference numerals:
1-a transverse inhaul cable; 2-distraction; 3-forked tail; 4-left side prop; 5-right side pillar; 6-auxiliary rope; 61-upper auxiliary rope; 62-lower auxiliary rope; 7-anchor angle steel; 8-a double-lug wedge-shaped wire clamp; 9-a first adjusting bolt; 10-a first connection section; 101-a first wedge clamp; 102-a first copper strand; 11-a second connection section; 12-a first suspension clamp; 13-a second suspension clamp; 14-a locator; 15-eye type wire clamp; 16-a second wedge clamp; 17-a second adjusting bolt; 18-a two-hole connecting plate; 19-an insulator; 20-temporary pull lines; 21-a carrier cable; 22-contact line.
As shown in fig. 1 to 8, the invention provides a construction method for temporarily positioning a cross line fork or a curve on a bridge of a contact network at an unfavorable terrain.
In this embodiment, taking the hard beam section as an example, the specific construction process is as follows:
step S1, pile crossing and measurement on site:
as shown in fig. 1, confirm the temporary switch position that corresponds with the contact net circuit and carry out the pile switching, wherein, temporary switch position includes: a frog head WA, a frog core 2 and a frog tail 3.
The following values were measured using a steel tape:
A. measuring a first strut side limit Cx1 and a second strut side limit Cx2 of two adjacent struts on the same side in a circuit of the overhead contact system;
B. measuring a first vertical distance S1 and a second vertical distance S2 from the fork 2 to the outer edges of the left and right struts respectively;
C. the distance y1 from the fork head WA to the fork 2 and the distance y2 from the fork 2 to the fork tail 3 are measured.
Step S2, calculation and prefabrication of the auxiliary rope 6:
A. calculating the length of the auxiliary rope 6:
calculation of the prefabricated total length S of the auxiliary rope 6:
S＝S1+S2
and (3) calculating the total cable length L of the prefabricated auxiliary cables 6:
L＝S-2Sx-2St
in the formula:
sx is a calculated length of the first adjusting bolt 9 in millimeters (mm);
and St is the vertical distance between the double-lug hole of the lower anchor angle steel 7 and the body of the lower anchor angle steel 7, and the unit is millimeter (mm).
B. Prefabricating an auxiliary rope 6:
a double-lug wedge-shaped clamp 8 is prefabricated at one end of the auxiliary cable 6, one end of the prefabricated auxiliary cable 6 is connected at a firm and reliable position, then the cable is spread and the other end of the auxiliary cable 6 is fastened by using a chain block and a wire tightener. And L is the hole distance of the double-lug wedge-shaped wire clamps 8 at the two ends of the auxiliary cable 6, the wire is broken after the length L is added with the return distance of 500mm, and then the double-lug wedge-shaped wire clamp 8 at the other end is prefabricated, so that the prefabricated return length is 500 mm. And a double-lug wedge-shaped wire clamp 8 is prefabricated at the other end of the auxiliary cable.
Further, the auxiliary rope 6 is 70mm in diameter 2 Aluminum-zinc plated steel stranded wire.
Step S3, calculation and prefabrication of the lateral bracing cable 1:
A. calculation of the total length of the lateral stay 1:
as shown in fig. 3, since the present embodiment takes the hard beam segment as an example for calculation, the equal diameter circular strut is used, and the strut slope is not considered. (the soft spanning section uses lattice steel struts, taking into account the slope of the struts and the taper of the struts themselves). In addition, the lateral shift amount of the auxiliary rope 6 is preset to 100mm (this value may be an empirically estimated value) in consideration of the pillar deflection and the case where the cord is stretched.
Prefabricated total length of transverse stay 1:
Lx＝Cx+(|Cx2-Cx1|)*(S1+x-y1)/(S1+S2)-a-100
in the formula:
a is a pull-out value of a transverse adjusting positioning point of the contact network, and is a preset value (for example, the value is specified by a design drawing, the suspension at each positioning point has the pull-out value specified by the design, and the value is represented by a lowercase letter a in railway contact network construction), and the unit is millimeter (mm);
cx is the smaller of Cx1 and Cx 2;
B. calculating the installation position of the transverse inhaul cable 1 on the auxiliary cable 6:
distance of the transverse guy cable 1 from the left side stay 4:
D1＝S1+x-y1
in the formula:
y1 is the distance from the frog head WA to the frog 2 in millimeters (mm);
x is the vertical distance from the forked head WA to the anchor point in millimeters (mm).
The positioning point is the installation position of the transverse cable 1 on the auxiliary cable 6, x is the vertical distance from the fork head WA to the positioning point for installing the transverse cable, and the determination method of the x value is as follows:
the train track generally adopts a steel rail with the rail type of 60Kg/m, and for different turnout types, such as a common No. 12 turnout, looking up a turnout positioning table (as shown in figure 6) can know that when the size of a turnout opening at a turnout post is 300mm, the distance from the corresponding positioning point to a first WA of the turnout is 16.5m, namely x is 16.5 m; when the size of the turnout opening at the turnout post is 350mm, the distance between the corresponding positioning point and the turnout head WA is 17.68m, namely x is 17.68 m. The selection of the size of the switch opening at the switch post during the table lookup process is generally determined by the design.
After determining the distance D1 of the lateral cable 1 from the left side stay 4 according to the above calculation method, one end of the lateral cable 1 is attached to the auxiliary cable 6 via the first suspension clamp 12.
Step S4, digging and backfilling the wire drawing pit:
as shown in fig. 1, the method comprises the steps of digging a guy pit, burying an anchor plate and a guy bar, and prefabricating a temporary guy wire 20:
in order to balance the tension generated by the auxiliary rope 6 to the inner sides of the two struts, two temporary stay wires 20 are respectively pulled on the outer sides of the two struts, firstly, a stay wire pit is excavated, and the stay wire pit is excavated at a position about 8m away from the outer sides of the two struts.
Further, in order to balance the pulling force of the transverse stay cable 1 on the strut through the auxiliary cable 6 in the construction process and ensure the stability of the strut, the temporary stay wire 20 is obliquely arranged towards the outer side of the contact net, the included angle between the temporary stay wire 20 and the auxiliary cable 6 on the horizontal plane is 6-10 degrees, then an anchor plate and an anchor rod are installed, and finally foundation pit backfilling is carried out.
Step S5, field installation and adjustment:
A. installing lower anchor angle steel 7 and temporary stay wires 20:
and (3) respectively installing lower anchor angle steel 7 on the two pillars by utilizing the skylight operation time, fixedly connecting the top end of the temporary stay wire 20 with the tops of the pillars through the lower anchor angle steel 7, and fixedly connecting the bottom end of the temporary stay wire 20 into a stay wire pit through an anchor plate and a stay bar.
Further, the temporary stay wire 20 is connected with the lower anchor angle steel 7 through a single-lug wedge-shaped wire clamp.
Further, the installation height of the anchor angle steel 7 is the average value of the height of the catenary 21 and the height of the contact line 22 at the transverse adjusting and positioning point of the contact line plus 150 mm.
B. Installing one end of a transverse inhaul cable 1:
one end of the transverse cable 1 is connected to the auxiliary cable 6 according to the installation position of the transverse cable 1 determined in step S3.
Further, one end of the transverse pulling rope 1 is connected with the auxiliary rope 6 through a first suspension clamp 12.
C. Installing an auxiliary rope 6:
and two ends of the auxiliary cable 6 are respectively connected with lower anchor angle steel 7 arranged on the two pillars.
The specific operation is as follows: a double-lug wedge-shaped wire clamp 8 at one end of an auxiliary cable 6 is connected with lower anchor angle steel 7 on a left pillar 4, a double-lug wedge-shaped wire clamp 8 at the other end of the auxiliary cable 6 is connected with a right pillar 5 through a chain block, and the double-lug wedge-shaped wire clamp 8 at the other end of the auxiliary cable 6 is connected with the lower anchor angle steel 7 on the right pillar 5 after the chain block is slowly tightened.
Further, a double-lug wedge-shaped wire clamp 8 is connected with double lugs of the lower anchor angle steel 7 through a first adjusting bolt 9.
Furthermore, in the installation process of the auxiliary cable 6, the first adjusting bolts 9 are loosened to the maximum length, and the first adjusting bolts 9 at the two ends are tightened after the installation is finished.
In order to match with the first suspension clamp 12, the auxiliary cable 6 is connected with the first suspension clamp 12 in an anti-skidding spare wire mode, the auxiliary cable 6 comprises a main wire, an anti-skidding spare wire and a parallel groove clamp, the parallel groove clamp is used for fixedly connecting the main wire and the anti-skidding spare wire, and the anti-skidding spare wire connected with the auxiliary cable 6 is made of a steel strand which is made of the same material as the auxiliary cable 6.
D. Installing the other end of the transverse inhaul cable 1:
as shown in fig. 1 to 4, the other end of the transverse guy cable 1 is connected with the overhead line system, the connection point of the transverse guy cable 1 and the overhead line system is a transverse adjusting positioning point of the overhead line system, an adjusting mechanism is arranged on the transverse guy cable 1, and the pull-out value of the transverse adjusting positioning point of the overhead line system is controlled by adjusting the length of the adjusting mechanism.
As shown in fig. 3, the adjusting mechanism is a second adjusting bolt 17, a first connecting section 10 is arranged at one end of the second adjusting bolt 17, a double-hole yoke plate 18, an insulator 19 and a second connecting section 11 are sequentially connected to the other end of the second adjusting bolt 17, the first connecting section 10 includes a copper stranded wire 102 and first wedge clamps 101 arranged at two ends of the copper stranded wire 102, the two first wedge clamps 101 are respectively used for connecting the auxiliary cable 6 and the second adjusting bolt 17, the second connecting section 11 includes a copper stranded wire 112 and second wedge clamps 111 arranged at two ends of the copper stranded wire 112, and the two second wedge clamps 111 are respectively used for connecting the insulator 19 and the carrier cable 21.
As shown in fig. 2 and 3, a first wedge wire clamp 101 at one end of a transverse cable 1 is connected with an auxiliary cable 6 through a first suspension wire clamp 12, a second wedge wire clamp 111 at the other end of the transverse cable 1 is connected with a catenary 21 through a second suspension wire clamp 13, an eye-shaped wire clamp 15 is arranged on a copper stranded wire 112 of a second connecting section 11, the eye-shaped wire clamp 15 is connected with a contact wire 22 through a 1300-shaped tubular positioner 14, and a positioning wire clamp of the tubular positioner 14 and the second suspension wire clamp 13 of the catenary 21 are arranged up and down along a vertical plane.
Further, as shown in fig. 4, in order to match the second suspension clamp 13, the messenger wire 21 is also connected with the second suspension clamp 13 in an anti-skid spare wire manner, the messenger wire 21 includes a main wire 211, an anti-skid spare wire 212 and a parallel groove clamp 213, the parallel groove clamp 213 is used for fixedly connecting the main wire 211 and the anti-skid spare wire 212, and the anti-skid spare wire 212 of the messenger wire 21 is a copper stranded wire.
The specific operation is as follows:
on the upper track of the catenary working ladder, as shown in fig. 4, an anti-skid spare wire 212 is installed on a catenary wire 21, the catenary wire 21 and a transverse cable 1 are connected by using a chain block, the chain block is tightened, and a second suspension wire clamp 13 of the anti-skid spare wire and a second wedge-shaped wire clamp 111 of the transverse cable are connected; the same method is used to connect the contact wire 22 with the positioning clamp of the tubular positioner 14 of the transverse traction cable. And then loosening the chain block, measuring the pulling-out value of the transverse adjusting positioning point of the contact net by using a laser measuring instrument of the contact net, comparing the pulling-out value with the value a, adjusting the pulling-out value by using a second adjusting bolt 17 on the transverse inhaul cable 1 when the pulling-out value is not in accordance with the requirements, and adjusting the pulling-out value a of the transverse adjusting positioning point of the contact net to be the same as the pulling-out value a of the transverse adjusting positioning point of the contact net required by the temporary turnout.
Example 2:
the present embodiment is different from embodiment 1 in that:
the auxiliary rope 6 and the transverse guy rope 1 in the embodiment 1 are single ropes. According to the actual situation in the field, as shown in fig. 7 and 8, two auxiliary ropes and two transverse pulling ropes are provided, each auxiliary rope comprises an upper auxiliary rope 61 and a lower auxiliary rope 62 which are arranged up and down, wherein the height of the upper auxiliary rope 61 is 150mm higher than the transverse adjusting positioning point of the catenary wire 21, and the height of the lower auxiliary rope 62 is 500mm higher than the transverse adjusting positioning point of the contact wire 22; the two transverse cables are arranged up and down, the upper transverse cable is correspondingly connected with the carrier cable 21, and the lower transverse cable is correspondingly connected with the contact line 22 through the tubular positioner 14.
In conclusion, the invention provides a construction method for temporarily positioning a contact network at an unfavorable terrain, the temporary auxiliary cable 6 is adopted to fix the transverse guy cable 1, the contact network is fixed through the transverse guy cable 1, anchor bolts are prevented from being implanted into an existing bridge by drilling, steel columns are prevented from being installed, and the existing bridge is prevented from being damaged; the transverse adjustment positioning point of the overhead line system above the frame bridge is determined through early-stage measurement and calculation, so that construction links are reduced, and the accuracy of the transverse adjustment positioning point is improved; the adopted method is simple, convenient and practical, and the construction efficiency is improved; the laser measuring instrument of the contact network is used for measuring the pulling value of the transverse adjusting positioning point of the contact network, and the adjusting mechanism on the transverse inhaul cable 1 can be used for adjusting the transverse adjusting positioning point, so that the technical parameters of the contact network line switch on the bridge can meet the requirements.
Claims (10)
- A construction method for temporarily positioning a contact net at an unfavorable terrain is characterized by comprising the following steps:step S1, pile crossing and measurement on site:confirm and carry out the handing over stake with the interim switch position that the contact net circuit corresponds, wherein, interim switch position includes: a fork head, a fork core and a fork tail;respectively measuring the first support side surface limit and the second support side surface limit of two supports on the same side in a circuit of the contact network;respectively measuring a first vertical distance and a second vertical distance from the fork center to the outer edges of the two support columns;measuring the distance from the fork head to the fork center and the distance from the fork center to the fork tail;step S2, calculating and prefabricating an auxiliary rope:calculating the total length of the auxiliary rope according to the first vertical distance and the second vertical distance in the step S1;prefabricating the auxiliary cable according to the calculated total length of the auxiliary cable;step S3, calculating and prefabricating a transverse stay:calculating the prefabricated total length of the transverse inhaul cable, and prefabricating the transverse inhaul cable according to the calculation result;determining the installation position of a transverse inhaul cable according to a turnout positioning table;step S4, digging and backfilling a wire drawing pit:digging wire drawing pits on the outer sides of the two supporting columns respectively;installing an anchor plate and a stay bar in the stay wire pit, and backfilling the stay wire pit;step S5, field installation and adjustment:installing lower anchor angle steel and temporary stay wires: in the skylight operation time, lower anchor angle steel and temporary stay wires are respectively arranged on the two pillars;installing one end of a transverse inhaul cable: according to the determined installation position of the transverse cable in the step S3, one end of the transverse cable is connected with the auxiliary cable through a suspension wire clamp;installing an auxiliary rope: two ends of the auxiliary cable are respectively connected with lower anchor angle steel arranged on the two pillars;installing the other end of the transverse inhaul cable: the other end of the transverse guy cable is connected with the contact net, the connecting point of the transverse guy cable and the contact net is a transverse adjusting locating point of the contact net, an adjusting mechanism is arranged on the transverse guy cable, and the pull-out value of the transverse adjusting locating point of the contact net is controlled by adjusting the length of the adjusting mechanism.
- The construction method for temporarily positioning the overhead line at the unfavorable terrain as set forth in claim 1, wherein in step S5, the top end of the temporary stay is fixedly connected with the top of the pillar through a lower anchor angle, and the bottom end of the temporary stay is fixedly connected in the stay pit through an anchor plate and a stay bar.
- The construction method for temporarily positioning the overhead line system at the unfavorable terrain as set forth in claim 2, wherein in step S5, binaural wedge clamps are prefabricated at both ends of the auxiliary rope, and the binaural wedge clamps are connected with the binaural of the lower anchor angle steel through first adjusting bolts;and the first adjusting bolts are loosened to the maximum length in the installation process of the auxiliary cable, and the first adjusting bolts at two ends are tightened after the installation is finished.
- The construction method for temporarily positioning the overhead line system at the unfavorable terrain as set forth in claim 1, wherein in step S5, the installation height of the lower anchor angle steel is the average of the catenary height and the contact line height at the transverse adjustment positioning point of the overhead line system plus 150 mm.
- The construction method for temporarily positioning the overhead line system at the unfavorable terrain as set forth in claim 1, wherein a first connecting section is provided at one end of the adjusting mechanism, and a diplopore yoke plate, an insulator and a second connecting section are sequentially connected to the other end of the adjusting mechanism, the first connecting section comprises a copper stranded wire and first wedge-shaped wire clamps provided at both ends of the copper stranded wire, the two first wedge-shaped wire clamps are respectively used for connecting the auxiliary cable and the adjusting mechanism, the second connecting section comprises a copper stranded wire and second wedge-shaped wire clamps provided at both ends of the copper stranded wire, and the two second wedge-shaped wire clamps are respectively used for connecting the insulator and the carrier cable of the overhead line system;wherein, the adjusting mechanism is a second adjusting bolt.
- The construction method for temporarily positioning the overhead line at the unfavorable terrain as set forth in claim 5, wherein in step S5, the first wedge clamp at one end of the transverse pulling line is connected with the auxiliary line through the first suspension clamp, and the second wedge clamp at the other end of the transverse pulling line is connected with the messenger line through the second suspension clamp; and the copper stranded wire of the second connecting section is provided with an eye-shaped wire clamp, the eye-shaped wire clamp is connected with the contact wire through a tubular positioner, and a positioning wire clamp of the tubular positioner and a second suspension wire clamp of the carrier cable are vertically arranged along a vertical plane.
- The construction method for temporarily positioning the overhead line system at the unfavorable terrain as set forth in claim 6, wherein the auxiliary cable and the catenary cable comprise a main cable, an anti-slip spare cable and a parallel groove clamp, wherein the parallel groove clamp is used for fixedly connecting the main cable and the anti-slip spare cable, the anti-slip spare cable of the catenary cable is made of copper stranded wires, and the anti-slip spare cable of the auxiliary cable and the auxiliary cable are made of steel stranded wires made of the same material.
- The construction method for temporarily positioning the overhead line system at the unfavorable terrain as set forth in claim 2, wherein a guy wire pit is excavated at 8m outside the strut, and the temporary guy wire angle of the temporary guy wire is inclined to 6-10 ° outside the overhead line system;the temporary stay wire is connected with the lower anchor angle steel through a single-lug wedge-shaped wire clamp.
- The construction method for temporarily positioning the overhead line system at the unfavorable terrain as set forth in any one of claims 1 to 8, wherein the auxiliary rope and the transverse guy rope are both single ropes.
- The construction method for temporarily positioning the overhead line system at the unfavorable terrain as set forth in any one of claims 1 to 8, wherein there are two auxiliary cables and two transverse cables, the two auxiliary cables are arranged up and down, the two transverse cables are arranged up and down, the upper transverse cable is connected with the catenary correspondingly, and the lower transverse cable is connected with the contact line correspondingly through the pipe type positioner.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/136576 WO2021223443A1 (en) | 2020-12-15 | 2020-12-15 | Construction method for temporary positioning of overhead line in adverse terrain |
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| CN114945491A true CN114945491A (en) | 2022-08-26 |
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| JPS4937126B1 (en) * | 1970-10-19 | 1974-10-05 | ||
| JP2000270455A (en) * | 1999-01-11 | 2000-09-29 | Shin Etsu Chem Co Ltd | Method and structure for blocking water to cable duct |
| JP4548948B2 (en) * | 2001-02-13 | 2010-09-22 | 東日本旅客鉄道株式会社 | Construction method of double-track train line |
| CN101602329B (en) * | 2009-07-01 | 2011-02-16 | 中铁七局集团电务工程有限公司 | Method for constructing 250km/h catenary systems of existing railway lines |
| CN206581682U (en) * | 2017-03-02 | 2017-10-24 | 中铁六局集团有限公司工程设计院 | A kind of interim transition structure in jacking framed bridge steel column for contacting net basis |
| CN107380012B (en) * | 2017-07-31 | 2019-11-12 | 中铁电气化局集团有限公司 | Existing electrified railway contact net holds, leads the synchronous replacement construction technology of two-wire |
| CN108973781B (en) * | 2018-06-28 | 2021-08-20 | 中铁建大桥工程局集团第五工程有限公司 | High-speed contact network cantilever and suspension accurate installation integrated process |
| CN109878380B (en) * | 2019-04-04 | 2022-05-13 | 中铁建大桥工程局集团电气化工程有限公司 | Subway vehicle section flexible contact net track-free construction method |
| CN110641319B (en) * | 2019-10-23 | 2023-03-28 | 中铁九局集团电务工程有限公司 | Construction method for erecting overhead line system of ascending and descending crossover line of electrified railway |
| CN111469717B (en) * | 2020-05-09 | 2023-09-12 | 中铁十二局集团电气化工程有限公司 | No-cross arrangement construction method for contact network at 42# turnout |
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|---|---|
| JP7202755B2 (en) | 2023-01-12 |
| JP2022534448A (en) | 2022-07-29 |
| WO2021223443A1 (en) | 2021-11-11 |
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