JP7202755B2 - Construction Method for Temporary Positioning of Catenary in Unfavorable Terrain - Google Patents

Description

The present invention belongs to the technical field of catenary construction for electrified railways, and more particularly to a construction method for temporary positioning of catenaries in adverse terrain.

A catenary is a large system that includes stanchions and foundations, support devices, contact suspensions, grounding and return devices, etc. Contact suspensions include messenger wires, contact wires, hanging strings, and related parts. , the upper end of the suspension string is connected to the messenger wire, and the lower end of the suspension string is connected to the contact wire, which serves to suspend the contact wire. Positioning of the catenary particularly refers to positioning with respect to messenger wires and contact wires.

In the renovation of the existing electrified railway station, there are many modifications of the rail switch in the throat area, and all of them need to work in the construction skylight, and the throat area at both ends of the station. Since there are many existing under crossing frame bridges, it is difficult to avoid temporary construction by inserting a temporary rail switch into the bridge surface. The catenary above the rail switch should be constructed synchronously.

In conventional construction, a set of large-span special transitional hard beams are often erected across the bridge along the direction of the railroad tracks, and then a transitional arm is attached to the hard beams. to position the catenary. This method has the drawbacks of a large amount of work, a long construction period, high cost, requiring work with a large crane, and only the catenary on the outermost track can be positioned.

Therefore, there is a need to provide a technical solution to overcome the deficiencies of the prior art.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a construction method for provisional positioning of catenaries in adverse terrain to solve or alleviate the problems existing in the prior art.

In order to achieve the above object, the present invention provides the following technical proposals.
The present invention
confirming the positions of temporary rail switches, including switch heads, switch centers and switch ends, corresponding to the tracks of the catenary, and performing pile handovers;
measuring the first stanchion side limit and the second stanchion side limit, respectively, on two stanchions on the same side of the catenary track;
measuring a first vertical distance and a second vertical distance from the switch center to the outer edges of the two posts, respectively;
Step S1, field pile handover and measurement, measuring the distance from the switch head to the switch center and the distance from the switch center to the switch end;
calculating the total length of the auxiliary cord based on the first vertical distance and the second vertical distance in step S1;
an auxiliary code calculation and prefabrication step S2, in which the auxiliary code is prefabricated based on the calculated total length of the auxiliary code;
Calculate the prefabricated total length of the lateral stay rope (lateral stay rope), and prefab the lateral stay rope based on the calculation result,
Step S3, calculating and prefabricating the lateral stay rope, determining the mounting position of the lateral stay rope based on the rail switch positioning table;
drilling a stay wire pit on each of the outsides of the two stanchions;
A step S4 of mounting an anchor plate and a stay wire rod in the stay wire pit and backfilling the stay wire pit, excavating and backfilling the stay wire pit;
attaching anchorage angle steel and temporary stay wire to each of the two stanchions during skylight work time;
Attaching one end of the horizontal stay rope, which connects one end of the horizontal stay rope to the auxiliary cord via the suspension wire clip, based on the installation position of the horizontal stay rope determined in step S3;
attaching an auxiliary cord connecting each of the ends of the auxiliary cord to anchorage angle irons attached to two posts;
The other end of the horizontal stay rope is connected to the catenary, and the connection point between the horizontal stay rope and the catenary is used as the horizontal adjustment positioning point of the catenary, and the horizontal stay rope is provided with an adjustment mechanism to adjust the length of the adjustment mechanism. step S5, which is field installation and adjustment, comprising: installing the other end of the lateral stay rope, which controls the withdrawal value of the lateral adjustment positioning point of the catenary, by
To provide a construction method for provisional catenary positioning in adverse terrain, comprising:

The technical solutions of the embodiments of the present invention have the following beneficial effects compared with the closest prior art.

1. The present invention adopts the auxiliary cord to fix the horizontal stay rope, and the horizontal stay rope to fix the catenary, so that the existing bridge can be drilled to embed the anchor bolt, and the steel column can be installed. to avoid damage to existing bridges.

2. Determine the lateral adjustment positioning point of the catenary above the frame bridge by the previous measurement and calculation, reduce the construction steps and improve the accuracy of the lateral adjustment positioning point.

3. The method adopted is simple and practical, and improves construction efficiency.

4. Use a catenary laser surveying instrument to measure and verify the pull-out value of the lateral adjustment positioning point of the catenary, and if it does not meet the requirements, it can be adjusted by the adjustment mechanism on the lateral stay rope, and the catenary rail switch on the bridge. Ensure that the technical parameters meet the requirements.

The specification drawings, which constitute a part of the invention, are used to provide a further understanding of the invention, and the schematic embodiments of the invention and their descriptions are used to interpret the invention. and does not constitute an undue limitation to the invention.
It is a line arrangement schematic diagram of the present invention. FIG. 2 is a detailed structural diagram of the auxiliary cord in FIG. 1; FIG. 3 is a structural detail view of the horizontal stay rope in FIG. 2; FIG. 4 is a structural detail view at the connection point between the transverse stay rope and the catenary in FIG. 3; It is a construction route diagram of the present invention. 4 is a rail switch positioning table; FIG. 8 is a structural schematic diagram of a double horizontal stay rope in Example 2; FIG. 4 is a structural schematic diagram of a double auxiliary cord in Embodiment 2;

As shown in FIGS. 1-8, the present invention provides a method of construction of provisional positioning at catenary cross-line switches or overpass curves in adverse terrain.

This embodiment takes the hard beam section as an example, and the specific construction process is as follows.

Step S1, Site Pile Handover and Measurement As shown in FIG. Execute handover.
Measure the following values using a steel tape measure.
A, Measure the first stanchion side limit Cx1 and the second stanchion side limit Cx2 on two adjacent stanchions on the same side of the catenary track.
B. A first vertical distance S1 and a second vertical distance S2 from the switch center 2 to the outer edges of the left and right pillars are measured respectively.
C. Distance y1 from switch head WA to switch center 2 and distance y2 from switch center 2 to switch end 3 are measured.

Step S2, calculation of auxiliary cord 6 and prefab A, calculation of length of auxiliary cord 6 Calculation of prefabricated total length S of auxiliary cord 6
S = S1 + S2
Calculation of total cord length L of prefabricated auxiliary cord 6
L=S-2Sx-2St
In the formula,
Sx is the calculated length of the first adjustment bolt 9, and the unit is millimeters (mm);
St is the vertical distance between both lug holes of the anchorage angle iron 7 and the main body of the anchorage angle iron 7, in millimeters (mm).

B. Prefabricated auxiliary cord 6 One end of the cord of the auxiliary cord 6 is prefabricated with a double-lug wedge wire clip 8, and one end of the prefabricated auxiliary cord 6 is firmly and securely positioned. , the cord is spread and the other end of the cord of the auxiliary cord 6 is tightened using a chain block and a wire gripper. The above L is the pitch of the double lug wedge wire clip 8 at both ends of the auxiliary cord 6. After adding a returning distance of 500 mm to the length L and breaking the wire, the double lug wedge wire at the other end The clip 8 is prefabricated and has a prefabricated return length of 500 mm. A double lug wedge wire clip 8 is prefabricated at the other end of the auxiliary cord.
Furthermore, the cord of the auxiliary cord 6 adopts 70 mm ² aluminized galvanized steel strands.

Step S3, calculation of horizontal stay rope 1 and prefab A, calculation of total length of horizontal stay rope 1 As shown in FIG. , and the tilt of the strut is not taken into account. (The soft cross segment employs gridded steel struts, and the tilt of the struts and the taper of the struts themselves must be considered). In addition, considering the bending of the strut and the pulling of the cord, the amount of lateral deviation of the auxiliary cord 6 is preset to 100 mm (this value may be an empirically estimated value).

The prefabricated total length of the horizontal stay rope 1 is
Lx=Cx+(|Cx2-Cx1|)*(S1+x-y1)/(S1+S2)-a-100
and in the formula
a is the withdrawal value of the catenary lateral adjustment positioning point, which is a preset value (for example, the value is specified in the design drawing, and the suspension at each positioning point is the withdrawal specified in the design) It has a value and is always indicated by a lower case letter a in railway catenary construction), the unit is millimeters (mm),
Cx is the smaller of Cx1 and Cx2.

B, Calculation of the installation position of the horizontal stay rope 1 in the auxiliary cord 6 The distance from the left support 4 of the horizontal stay rope 1 is
D1=S1+x−y1
and in the formula
y1 is the distance from the switch head WA to the switch center 2 in millimeters (mm);
x is the vertical distance from the switch head WA to the positioning point in millimeters (mm).

The positioning point here is the attachment position of the horizontal stay rope 1 on the auxiliary cord 6, x is the vertical distance from the switch head WA to the positioning point where the horizontal stay rope is attached, and the method of determining the x value is as follows. is.
Train rails generally adopt rails with a rail type of 60Kg/m, and for different rail switch types, such as the common No. 12 rail switch, the rail switch positioning table (as shown in Figure 6) , if the size of the rail switch opening in the rail switch column is 300 mm, the distance from the corresponding positioning point to the switch head WA is 16.5 m, i.e. x is 16.5 m, and the rail switch If the size of the rail switch opening in the column is 350mm, the distance from the corresponding positioning point to the switch head WA is 17.68m, ie x is 17.68m. The selection of the size of the rail switch aperture in the rail switch column in the process of searching the table is generally determined by design circumstances.

After determining the distance D1 from the left strut 4 of the horizontal stay rope 1 based on the above calculation method, one end of the horizontal stay rope 1 is attached to the auxiliary cord 6 via the first suspension wire clip 12 .

Step S4, Excavation and Backfilling of Staywire Pit As shown in FIG.

In order to balance the tension generated by the auxiliary cord 6 against the inside of the two stanchions, two temporary stay wires 20 are stretched on each of the outsides of the two stanchions. A stay wire pit will be excavated approximately 8 m from the outside of each stanchion.

In addition, the temporary stay wire 20 is slanted toward the outside of the catenary in order to balance the tension generated by the lateral stay rope 1 against the strut via the auxiliary cord 6 during the construction process and to ensure the stability of the strut. The included angle in the horizontal plane between the temporary stay wire 20 and the auxiliary cord 6 is 6 to 10°, then the anchor plate and stay wire rod are attached, and finally the foundation pit is backfilled.

Step S5, Field Installation and Adjustment A, Install the anchorage angle steel 7 and the temporary stay wire 20;
Using the skylight working time, an anchorage angle steel 7 is attached to each of the two columns, the top end of the temporary stay wire 20 is fixedly connected to the top of the column via the anchorage angle steel 7, and the temporary stay The bottom ends of the wires 20 are fixedly connected into the stay wire pits via anchor plates and stay wire rods.

Further, the temporary stay wire 20 and the anchorage angle steel 7 are connected via a single lug wedge wire clip.

Furthermore, the mounting height of the anchorage angle iron 7 is the average of the height of the messenger wire 21 and the height of the contact wire 22 at the catenary lateral adjustment positioning point plus 150 mm.

B, Attach one end of the horizontal stay rope 1;
One end of the horizontal stay rope 1 is connected to the auxiliary cord 6 based on the attachment position of the horizontal stay rope 1 determined in step S3.

Furthermore, one end of the horizontal stay rope 1 is connected to the auxiliary cord 6 via the first hanging wire clip 12 .

C. Attach the auxiliary cord 6.
Each end of the auxiliary cord 6 is connected to an anchorage angle iron 7 attached to two posts.

Specific operations are as follows. A double lug wedge wire clip 8 at one end of the auxiliary cord 6 is connected to the anchorage angle iron 7 on the left stanchion 4, and the double lug wedge wire clip 8 at the other end of the auxiliary cord 6 is connected to the right stanchion via a chain block. 5, and after gradually tightening the chain block, the double lug wedge wire clip 8 at the other end of the auxiliary cord 6 is connected to the anchorage angle iron 7 on the right stanchion 5.

Furthermore, the double lug wedge wire clip 8 is connected to the double lug of the anchorage angle steel 7 via the first adjusting bolt 9 .

Furthermore, in the process of attaching the auxiliary cord 6, the first adjusting bolts 9 are loosened to the maximum length, and after the attachment is completed, the first adjusting bolts 9 at both ends are tightened.

In order to match the first suspension wire clip 12, the auxiliary cord 6 is connected to the first suspension wire clip 12 by adopting the method of anti-skid backup line, and the auxiliary cord 6 is attached to the main a cord, an anti-skid backup line, and a parallel groove clamp, the parallel groove clamp being used to fixedly connect the main cord and the anti-skid backup line; A steel strand of the same material as the auxiliary cord 6 is used for the connected anti-slip backup line.

D, Attach the other end of the horizontal stay rope 1.
1 to 4, the other end of the lateral stay 1 is connected to the catenary, the connection point between the lateral stay 1 and the catenary is the lateral adjustment positioning point of the catenary, and the lateral stay 1 has an adjustment A mechanism is provided to control the pull-out value of the lateral adjustment positioning point of the catenary by adjusting the length of the adjustment mechanism.

As shown in FIG. 3, the adjusting mechanism is a second adjusting bolt 17, one end of the second adjusting bolt 17 is provided with a first connecting section 10, and the other end of the second adjusting bolt 17 is a double A hole yoke plate (18), an insulator (19) and a second connection section (11) are sequentially connected, and the first connection section (10) is provided with a copper strand (102) and both ends of the copper strand (102). Each of the two first wedge wire clips 101 is used to connect the auxiliary cord 6 and the second adjustment bolt 17, and the second connection section 11 includes a copper strand 112 and second wedge wire clips 111 provided at both ends of the copper strand 112, each of the two second wedge wire clips 111 for connecting the insulator 19 and the messenger wire 21. used for

As shown in FIGS. 2 and 3 , a first wedge wire clip 101 at one end of the lateral stay rope 1 is connected to the auxiliary cord 6 via a first suspension wire clip 12 , and the other end of the lateral stay rope 1 is connected to the auxiliary cord 6 . is connected to the messenger wire 21 via a second suspension wire clip 13, and is contacted to the copper strand 112 of the second connection section 11 via a tubular positioner 14 of type 1300. An eye-shaped wire clip 15 connected to the wire 22 is provided, and the positioning wire clip of the tubular positioner 14 and the second hanging wire clip 13 of the messenger wire 21 are arranged one above the other along a vertical plane.

In addition, as shown in FIG. 4, in order to match the second suspension wire clip 13, the messenger wire 21 is also connected to the second suspension wire clip 13 by adopting the method of non-slip backup line, and the messenger wire 21 is It includes a main cord 211 , an anti-skid backup line 212 , and a parallel groove clamp 213 , the parallel groove clamp 213 being used to fixedly connect the main cord 211 and the anti-skid backup line 212 to the messenger wire 21 . The anti-skid backup line 212 employs copper strands.

Specific operations are as follows.
The catenary work ladder car rides on the rail, and as shown in FIG. 4, the messenger wire 21 is attached with an anti-slip backup line 212, the chain block is used to connect the messenger wire 21 and the horizontal stay rope 1, and the chain block is tightened. , connecting the second suspension wire clip 13 of the anti-skid backup line and the second wedge wire clip 111 of the lateral stay rope, and in the same way the contact wire 22 and the positioning wire clip of the tubular positioner 14 of the lateral stay rope; to connect. After that, loosen the chain block, use the catenary laser survey instrument to measure the withdrawal value of the lateral adjustment positioning point of the catenary, and check with the above a. After adjustment, the pull-out value of the lateral adjustment positioning point of the catenary should be the same as the pull-out value a of the lateral adjustment positioning point of the catenary required for the temporary rail switch.

Example 2:
The difference of this embodiment from the first embodiment is as follows.
Both the auxiliary cord 6 and the horizontal stay rope 1 in Example 1 are one cord. As shown in FIGS. 7 and 8, there are two auxiliary cords and two horizontal stay ropes, and the auxiliary cords include an upper auxiliary cord 61 and a lower auxiliary cord 62 arranged vertically according to the actual situation of the site. , the height of the upper auxiliary cord 61 is 150 mm higher than the horizontal adjustment positioning point of the messenger wire 21, the height of the lower auxiliary cord 62 is 500 mm higher than the horizontal adjustment positioning point of the contact wire 22, and the two horizontal stay ropes are arranged vertically. The upper lateral stay rope is correspondingly connected to the messenger wire 21 , and the lower lateral stay rope is correspondingly connected to the contact wire 22 via the tubular positioner 14 .

In short, the present invention provides a construction method for temporarily positioning a catenary in disadvantageous terrain, adopting a temporary (temporary) auxiliary cord 6 to fix the lateral stay rope 1, and fix the catenary with the lateral stay rope 1. This avoids drilling into the existing bridge to embed anchor bolts and installing steel columns, avoiding damage to the existing bridge, and lateral adjustment positioning of the catenary above the frame bridge by pre-measurement and calculation. Determine the point, reduce the construction steps, improve the accuracy of the lateral adjustment positioning point, the method adopted is simple and practical, improve the construction efficiency, and use the catenary laser surveying instrument to The pull-out value of the adjustment positioning point can be measured and adjusted by the adjustment mechanism in the lateral stay rope 1 to ensure that the technical parameters of the catenary rail switch on the bridge meet the requirements.

1 Horizontal Stay Rope 2 Switch Center 3 Switch End 4 Left Post 5 Right Post 6 Auxiliary Cord 61 Upper Auxiliary Cord 62 Lower Auxiliary Cord 7 Anchorage Angle Iron 8 Double Lug Wedge Wire Clip 9 First Adjustment Bolt 10 First Connection Section 101 First wedge wire clip 102 First copper strand 11 Second connection section 12 First suspension wire clip 13 Second suspension wire clip 14 Positioner 15 Eye-shaped wire clip 16 Second wedge wire clip 17 Second adjustment bolt 18 Double hall yoke plate 19 Insulator 20 Temporary stay wire 21 Messenger wire 22 Contact wire

Claims (10)

A construction method for temporary positioning of a catenary in unfavorable terrain,
In step S1, which is [field measurement],
Locating temporary rail switches, including switch heads, switch centers and switch ends, corresponding to catenary tracks,
measuring a first strut side limit and a second strut side limit, respectively, for two struts on the same side of the catenary track;
measuring a first vertical distance and a second vertical distance from the switch center to the outer edges of the two posts, respectively;
step S1 of measuring the distance from the switch head to the switch center and the distance from the switch center to the switch end;
In step S2, which is [calculation and prefabrication of auxiliary code],
calculating the total length of the auxiliary cord based on the first vertical distance and the second vertical distance in step S1;
a step S2 of prefabricating the auxiliary cord based on the calculated total length of the auxiliary cord;
In step S3, which is [calculation and prefabrication of sideways stay rope],
calculating the prefabricated total length of the horizontal stay rope, and prefabricating the horizontal stay rope based on the calculation result;
Step S3 of determining the mounting position of the horizontal stay rope based on the rail switch positioning table;
In step S4, which is [excavation and backfilling of stay wire pit],
digging a stay wire pit in each of the outsides of said two stanchions;
a step S4 of attaching an anchor plate and a stay wire rod to the stay wire pit and backfilling the stay wire pit;
In step S5 [is field installation and adjustment],
[Attachment of anchorage angle steel and temporary stay wire ] of attaching an anchorage angle steel and a temporary stay wire to each of the two pillars;
[ Installation of one end of the horizontal stay rope ], in which one end of the horizontal stay rope is connected to the auxiliary cord via a suspension wire clip based on the mounting position of the horizontal stay rope determined in step S3. a step ;
connecting each of the ends of the auxiliary cord to the anchorage angle steel attached to the two stanchions ;
The other end of the horizontal stay rope is connected to the catenary, and the connection point between the horizontal stay rope and the catenary is used as a horizontal adjustment positioning point of the catenary to adjust the length of the adjustment mechanism provided on the horizontal stay rope. [ installation of the other end of the transverse stay rope ] to control the withdrawal value of the transverse adjustment positioning point of the catenary by
construction method for temporary positioning of catenaries in adverse terrain, including; In step S5, the top end of the temporary stay wire is fixedly connected to the top of the column via the anchorage angle steel, and the bottom end of the temporary stay wire is connected via the anchor plate and the stay wire rod. fixedly connected within the stay wire pit;
The construction method for temporary positioning of catenaries in disadvantageous terrain according to claim 1, characterized in that: In step S5, prefabricating double lug wedge wire clips connected to the double lugs of the anchorage angle steel via first adjusting bolts at both ends of the auxiliary cord;
In the process of installing the auxiliary cord, loosen the first adjustment bolt to the maximum length, and tighten the first adjustment bolts at both ends after the installation is completed.
The construction method for temporary positioning of the catenary in disadvantageous terrain according to claim 2, characterized in that: In step S5, the mounting height of the anchorage angle steel is the average of the height of the messenger wire and the height of the contact wire at the catenary lateral adjustment positioning point plus 150 mm.
The construction method for temporary positioning of catenaries in disadvantageous terrain according to claim 1, characterized in that: A first connecting section is provided at one end of the adjusting mechanism, and a double hall yoke plate, an insulator and a second connecting section are sequentially connected to the other end of the adjusting mechanism, and the first connecting section comprises: a first copper strand and first wedge wire clips provided on both ends of said first copper strand, each of said two first wedge wire clips carrying said auxiliary cord and said adjustment mechanism. used to connect, the second connecting section includes a second copper strand and second wedge wire clips provided at both ends of the second copper strand, two of the second wedge wire clips are used to connect messenger wires of the insulator and the catenary,
wherein the adjustment mechanism is a second adjustment bolt;
The construction method for temporary positioning of catenaries in disadvantageous terrain according to claim 1, characterized in that: In step S5,
The first wedge wire clip at one end of the lateral stay rope is connected to the auxiliary cord via a first suspension wire clip, and the second wedge wire clip at the other end of the lateral stay rope is a second wedge wire clip. The second copper strand of the second connecting section is provided with an eye-shaped wire clip connected to the messenger wire via a hanging wire clip and connected to the contact wire via a tubular positioner, and the tube the positioning wire clip of the mold positioner and the second hanging wire clip of the messenger wire are arranged one above the other along a vertical plane;
The construction method for temporary positioning of the catenary in disadvantageous terrain according to claim 5, characterized in that: The auxiliary cord and the messenger wire each include a main cord, an anti-skid backup line, and a parallel groove clamp, the parallel groove clamp for fixedly connecting the main cord and the anti-skid backup line. The anti-slip backup line of the messenger wire adopts a copper strand, and the anti-slip backup line and the auxiliary cord of the auxiliary cord both adopt steel strands of the same material.
The construction method for temporary positioning of a catenary in disadvantageous terrain according to claim 6. The stay wire pit is excavated at a point 8 m from the outside of the support, and the temporary stay wire angle of the temporary stay wire is inclined 6 to 10 degrees toward the outside of the catenary,
The temporary stay wire and the anchorage angle steel are connected via a single lug wedge wire clip,
The construction method for temporary positioning of the catenary in disadvantageous terrain according to claim 2, characterized in that: The auxiliary cord and the horizontal stay rope are both one cord,
The construction method for temporary positioning of a catenary in disadvantageous terrain according to any one of claims 1 to 8. There are two auxiliary cords and two horizontal stay ropes, the two auxiliary cords are arranged vertically, the two horizontal stay ropes are arranged vertically, and the upper horizontal stay rope is the messenger correspondingly connected to a wire, and the lower lateral stay rope is correspondingly connected to the contact wire through the tubular positioner;
The construction method for temporary positioning of a catenary in disadvantageous terrain according to claim 6 or 7 , characterized in that:

Images