CN111907378A - Passenger-cargo collinear carrier cable and contact line synchronous replacement construction process - Google Patents

Abstract

The invention discloses a passenger-cargo collinear catenary cable and contact line synchronous replacement construction process, and relates to the technical field of railway electrification engineering construction. The synchronous replacement construction process for the passenger-cargo collinear catenary and the contact line has the advantages that the synchronous replacement construction process for the catenary, the contact line and the compensating device optimizes and integrates partial process flows in the traditional construction scheme, the number of parallel operation processes is increased, the utilization rate of the sealing skylight is improved, potential safety hazards such as loads of existing anchor columns along the line direction are effectively avoided, and the times and the duration of high-altitude operation of operators are reduced. The invention is suitable for the construction of simultaneously replacing the carrier cable and the contact wire in the 210-minute blocking power failure point of the passenger-cargo collinear electrification line by adopting a 'small tension paying-off technology', and meets the requirements of replacing a carrier cable seat, a positioning wire clamp, an anchoring compensation device and other construction tasks in the point.

Description

Passenger-cargo collinear carrier cable and contact line synchronous replacement construction process

Technical Field

The invention relates to the technical field of railway electrification engineering construction, in particular to a passenger-cargo collinear catenary and contact line synchronous replacement construction process.

Background

At present, the replacement of a single catenary or a single contact wire (called a wire for short) is carried out under the condition of a V-shaped skylight in the line replacement construction of an electrified railway contact network, or the replacement of the catenary and the contact wire is carried out by adopting two operation vehicles respectively, so that the construction of replacing the catenary and the contact wire needs two skylight points or 2 operation vehicles simultaneously, and the suspension adjustment operation is repeatedly carried out, the construction efficiency is low, the utilization rate of the skylight points, personnel and machinery is not high, the cost is greatly increased, and the management risk of construction safety and quality is caused by project delay.

Disclosure of Invention

Therefore, the invention provides a passenger-cargo collinear catenary and contact line synchronous replacement construction process, which aims to solve the problems of low construction efficiency and greatly increased construction cost caused by respectively replacing the catenary and the contact line in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

the passenger-cargo collinear carrier cable and contact line synchronous replacement construction process comprises the following steps:

1) preparing before operation, testing electricity of a contact net and adding a hanging ground wire, fixing four auxiliary ropes on an anchor ring of a stay wire foundation of an anchor lifting column, wherein tighteners are additionally arranged at the tail ends of the four auxiliary ropes, two auxiliary ropes are horizontally spread to a midspan position in the direction of a conversion column and are used for temporary anchor lifting of a new line, the other two auxiliary ropes are used for replacing a compensation device, and the tail ends of the two auxiliary ropes used for replacing the compensation device are respectively fixed on an existing carrier cable to be removed and an existing contact line to be removed through the tighteners;

2) the new contact line and the new carrier cable are respectively connected with two auxiliary ropes for temporary anchoring of the new line to complete the temporary anchoring of the new line;

3) the new catenary is temporarily suspended on the end head of the flat cantilever, and the new contact line is temporarily suspended on the existing contact line to be dismantled;

synchronously replacing the compensation devices on two sides during the stretching and releasing of a cable, tensioning two auxiliary ropes for replacing the compensation devices, enabling the auxiliary ropes to be in a straightening state, unloading the balance weights on the balance weight rod one by one, loosening and drooping the compensation devices, opening and then unloading the compensation devices from the positions of the insulators, installing a new compensation device in situ after completely removing an old compensation device, lifting and installing the balance weight on the anchor lifting side in place, and piling and aligning the balance weights on the balance weight rod on the anchor falling side;

4) the new line is formally anchored, the newly laid contact line, the carrier cable and the new compensating device are connected in place, and two auxiliary ropes for temporary anchoring are removed;

5) dropping the anchor;

6) removing the old line, and removing the original contact line and the carrier cable;

7) installing a middle anchor, namely installing a carrier cable and a contact line middle anchor;

8) and adjusting a contact net, namely, slowing the saddle from the central anchor knot to the anchoring direction, installing a positioning device and a hanging string, and adjusting a compensation device.

Further, in the step 2), a new line is selected to be anchored at the opening side, the stringing vehicle runs to a position of a conversion column far away from the anchoring column to be stopped, the new contact line and the new carrier cable are manually pulled to advance to the anchoring column along the direction of the existing contact line to be dismantled, and the new cable is connected with two auxiliary ropes reserved on the road shoulder and used for temporarily anchoring the new line, so that temporary anchoring of the new line is completed;

or in the step 2), the new line is selected to be anchored at the cross side, the stringing vehicle runs to the position of the conversion column nearest to the anchoring column to stop, the operator respectively passes the new contact line and the new catenary cable above the existing catenary cable needing to be dismantled and the existing contact line needing to be dismantled of the working support, the new contact line and the new catenary cable are manually pulled to advance to the anchoring column along the direction of the existing contact line needing to be dismantled, and the new cable is connected with two auxiliary ropes reserved on the road shoulder and used for temporary anchoring of the new line, so that temporary anchoring of the new line is completed.

Further, in the process of erecting the wire rope in the step 3), the new catenary and the new contact wire are always positioned on the line side of the old wire, and the new catenary is positioned on the line side of the new contact wire, so as to prevent wire stranding.

Further, when the anchor is dropped from the side of the joint opening in the step 5), the catenary cable is hung on the end of the wrist arm far away from the strut in the joint from the position of the central column, a new contact line is hung on the existing contact line to be removed, a worker opens a dropper of another anchor section in the joint before dropping the anchor, and the catenary cable passes through and is installed at the correct position;

and 5) when the joint is crossed and anchored laterally, hanging the new catenary and the new contact line along the direction of the existing contact line to be removed, and installing the pulley block on the new line after the pulley block passes through the upper parts of the existing bearing catenary and the existing bearing contact line respectively by an operator at the midspan position in front of the anchor-dropping column to start anchor-dropping operation.

Furthermore, the anchor dropping operation in the step 5) adopts non-simultaneous anchor dropping of the carrier cable and the contact line, the anchor dropping mode of the carrier cable is firstly carried out and then the anchor dropping mode of the contact line is carried out, and the anchor dropping operation modes of the carrier cable and the contact line are the same; before the anchor is dropped, the line is pre-tightened manually, then the line is tightened by using the pulley block, simultaneously, the tension of the existing catenary cable to be dismantled or the existing contact line to be dismantled is synchronously reduced, the line is tightened after the cable reaches the rated tension and the a value and the b value of the anchor dropping side compensation device meet the requirements, and after the anchor dropping of the catenary cable is completed, a new contact line is hung on the new catenary cable;

and simultaneously when the wire is tightened and the anchor is dropped, the anchor lifting side synchronously loads the balance weight, and the compensation rope between the compensation pulleys is kept continuously stressed in the process of installing the balance weight.

Further, step 6) old line dismantling comprises the following steps:

601) after the anchor falling is finished, hanging the new contact line on the new catenary, and detaching the pulley hung on the old contact line;

602) auxiliary pulley block for installation

After the cable is laid out, a broken cable group is arranged at a middle anchor to assist in dismantling an old contact line, two ends of the pulley group are connected with an old carrier cable by using a tightener, a tail rope of the pulley group is arranged on a steel rail and tightened, the pulley group is firmly fixed to wait for a cable breaking command, and the broken cable is carried out by referring to the carrier cable and pulley group installation mode when the old contact cable breaks;

603) the guide chain hoist on the auxiliary rope for fixing the old wire is loosened, the tension of the old wire is gradually reduced, the existing contact wire to be dismantled is loosened, the wire breaking group tightens the tail rope of the pulley block covering the steel rail, the old contact net in a span is broken after large sag occurs, other operation groups are sequentially broken in sections, the old contact net safely falls to the ground, the old wire is cut and bundled in sections according to a certain length by the recovery group, and the old wire is transported to the outside of the wire to be recovered.

Further, the adjusting and compensating device in the step 8) comprises the following steps:

when the carrier cable and the contact line reach the design tension and are stable, the difference value of the a value during design and installation is rechecked, the position to be broken is marked, and the a value is adjusted after the new carrier cable and the new contact line are pulled by using the hand-drive block, the tightener and the steel wire rope;

and during b value adjustment, the balance weight is lifted to a height exceeding the design height by 150mm +/-20 mm by using a manual hoist to be connected with a double-lug wedge wire clamp at the end part of the compensation rope, and the compensation rope is tightened after the position is adjusted to complete b value adjustment.

Furthermore, replacing the messenger wire seat and the positioning wire clamp in the preparation work before the operation in the step 1), and after the replacement is finished, temporarily fixing the existing messenger wire to be removed on the flat cantilever, and temporarily fixing the existing contact wire and the anti-positioning pipe to be removed on the oblique cantilever.

The invention has the following advantages:

the invention optimizes and integrates partial process flows in the traditional construction scheme, increases the number of parallel operation processes, improves the utilization rate of a sealed skylight or the risk of synchronous operation of a plurality of rail vehicles, effectively avoids the potential safety hazards of the existing anchor post such as load along the direction of a line and the like, and reduces the times and duration of high-altitude operation of operators.

In the prior art, two operation vehicles are mostly adopted for wiring operation, but only one operation vehicle is used in the invention, so that the use efficiency of the vehicle is improved. The compensation device can be taken off when the new line is unfolded, so that time is provided for replacing the compensation device, the new line load can be avoided in the whole paying-off process of the anchor post after the compensation device is taken off, the load of the old line on the anchor post is reduced, the construction safety is improved, and the purposes of optimizing the working procedures, saving the cost, synchronously performing a plurality of operations and the like are achieved.

The pulley block is arranged in the middle of the anchor section, and the old line can safely fall to the ground and the construction is safer by adopting the transformation ratio characteristic of the pulley block. In addition, when a new carrier cable and a contact line are anchored in the prior art, two trolleys are required to be disassembled and independently run to an anchor column for anchoring, and the process is complicated.

The invention is suitable for the construction of simultaneously replacing the carrier cable and the contact wire in the 210-minute blocking power failure point of the passenger-cargo collinear electrification line by adopting a 'small tension paying-off technology', and meets the requirements of replacing a carrier cable seat, a positioning wire clamp, an anchoring compensation device and other construction tasks in the point.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.

Fig. 1 is a flow chart of a passenger-cargo collinear catenary and contact line synchronous replacement construction process provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view showing temporary anchoring of a new thread in accordance with embodiment 1 of the present invention;

fig. 3 is a schematic view of suspension of a carrier cable and a contact wire in embodiment 1 of the invention;

FIG. 4 is a schematic view of the new line layout in embodiment 1 of the present invention;

FIG. 5 is a schematic view of an articulated cross-over side drop anchor according to example 1 of the present invention;

in the figure: 1-bracing wire foundation 2-auxiliary rope 3-anchor-lifting column 4-compensating device 5-existing contact wire 6 to be dismantled-existing carrier cable 7 to be dismantled-new contact wire 8-new carrier cable 9-tightener 10-anchor-falling column 11-S hook 12-existing supporting cable 13-existing supporting contact wire.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof are also regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1, the construction process for synchronously replacing the passenger-cargo collinear catenary and contact line comprises the following steps:

1) preparation before work

101) Construction survey

Selecting a starting point

The anchor post position in the anchor section is generally selected for measurement and the measurement is carried out according to the whole anchor section.

② longitudinal positioning and carrier cable, contact line height and pull-out value measurement

From a starting point, according to a plane layout diagram of a contact network, the span of a strut is measured along a steel rail by a steel tape, and the heights of a carrier cable and a contact line and a pull-out value are measured by a DJJ-8 measuring instrument. The hanger is calculated and pre-configured by software.

Writing mark

Paint dipping with a painting brush is used for marking the position measured along the longitudinal direction of the steel rail.

Fourthly, finishing one measurement, and arranging and storing measurement records by a measurer.

102) Electricity testing grounding

Firstly, after an equipment management unit receives a power failure command of a contact network, the contact network is tested and a ground wire is added, and a responsible person for site construction supervises and confirms the whole process.

And secondly, after receiving the construction permission command, the on-site construction responsible person can inform the operator to start construction.

103) Installation auxiliary rope

Four auxiliary ropes 2 with the length of about 30 meters are fixed on an anchor ring of a stay wire foundation 1 of an anchor lifting column 3 through a 3T lever hoist, the auxiliary ropes 2 adopt GJ-50 type steel wire ropes, and the tail end of each auxiliary rope 2 is connected with 1 tightener 9. Two sealing pulleys are respectively hung on two sides of the lower anchor angle steel of the existing catenary 6 and the existing contact line 5 to be dismantled through steel wire sleeves, two auxiliary ropes 2 penetrate through the two sealing pulleys, and a wire tightener 9 at the tail end of each auxiliary rope 2 is fixed on the existing catenary 6 and the existing contact line 5 to be dismantled. The other two auxiliary ropes 2 are horizontally spread to the midspan position towards the direction of the conversion column and are paved on the road shoulder for temporary anchoring of a new line.

104) Replacement of carrier cable seat and positioning cable clamp

And arranging an adjusting operation group to carry out replacement operation of the carrier cable seat and the positioning wire clamp while the anchor lifting and dropping preparation work is carried out. After finishing, the existing carrier cable 6 to be dismantled is temporarily fixed on the flat cantilever, and the existing contact wire 5 and the reverse positioning pipe to be dismantled are temporarily fixed on the inclined cantilever.

2) Temporary anchor of new line

Referring to fig. 2, when a new line is selected to be anchored at the opening side, the stringing vehicle runs to a position of a conversion column far away from an anchoring column to be stopped, a carrier cable and a contact line are manually pulled to advance to the anchoring column 3 along the direction of the existing contact line to be dismantled, and the new cable is connected with two auxiliary ropes 2 which are reserved on a road shoulder and used for temporarily anchoring the new line, so that the temporary anchoring of the new line is completed;

when a new line is selected to be anchored at the cross side, the stringing vehicle runs to the position of the conversion column closest to the anchoring column 3 to stop, an operator respectively penetrates a new catenary 8 and a new contact line 7 above the existing catenary 6 and the existing contact line 5 of the working support to be dismantled, and after the new line is manually dragged to the position of the anchoring column 3, the new line is connected with two auxiliary ropes 2 which are reserved on a road shoulder and used for temporarily anchoring the new line, so that the temporary anchoring of the new line is completed.

3) Exhibition of clues

Referring to fig. 3, after the temporary anchoring of the new line is completed, the stringing vehicle spreads a new carrier cable 8 and a new contact line 7 according to the running speed of not more than 5 km/h. And a new catenary 8 is temporarily suspended at the end of the flat wrist arm by adopting a plastic sealing pulley at each wrist arm, a new contact wire 7 is suspended on the existing contact wire 5 to be dismantled through the pulley, and the number of the suspended catenary per span is not less than 4.

For the curved section, a new carrier cable 8 can be directly placed above the flat cantilever and fixed by a sealing pulley, so that the saddle is convenient for the ladder truck or the working truck.

Referring to fig. 4, the new messenger 8 and the new contact wire 7 should always be on the line side of the old wire and the new messenger 8 on the line side of the new contact wire 7 during the erection of the cable to prevent twisting.

Synchronously replacing the compensating device of the anchor section during the cable spreading period, wherein the replacement operation modes of the anchor lifting side and the anchor falling side are consistent;

old compensation demolition

After a wire tightener on the auxiliary rope 2 is firmly connected with an existing carrier cable 6 and a contact wire 5 which need to be removed, a person under the rod shakes a chain block at the other end of the auxiliary rope 2, the auxiliary rope 2 is gradually stressed and stops after being in a straightening state, the person on the rod unloads all balance weights on the balance weight rod one by one from top to bottom, the balance weights are stacked beside the support, the compensating device 4 relaxes and droops, and an operator above the balance weight 4 is opened from the position of the insulator and then is tied down by a small rope.

New compensating installation

And after the old compensation device 4 is completely disassembled, the ground matching personnel install the new compensation device in situ. Before installation, the values of a and b are determined according to the length of an anchor section and the construction temperature, and the distance between two compensating pulleys is determined by considering the elongation of a new line. (put construction preparation department), adopt 3 copper wire checkposts to fix together two compensation ropes between the side compensation pulley of anchoring, prevent that the cable wire exhibition from putting and taking place the drunkenness when falling the anchor. The balance weight on the anchor lifting side is not installed temporarily. After the compensation device is replaced on the anchor side, the balance weight is stacked on the weigh beam, and a compensation pulley block for anchoring is arranged on the new compensation device 4.

4) New line formal anchor

And connecting the newly laid new contact wire 7, the new carrier cable 8 and the new compensating device 4 in place, and removing the two auxiliary ropes 2 for temporary anchor lifting.

5) Drop anchor

When the anchor is dropped from the side of the joint opening, the carrier cable is hung from the position of the central column on the end of the wrist arm far away from the support column in the joint, the new contact wire 7 is hung on the existing contact wire 5 to be dismantled, and before the anchor is dropped, a worker opens the dropper of the other anchor section in the joint to pass through and install the carrier cable at the correct position.

Referring to fig. 5, when the joint is anchored at the side in a crossing manner, the new catenary 8 and the contact line are both suspended along the direction of the existing contact line to be removed, and at the midspan position in front of the anchor post 10, an operator passes through the pulley block from above the existing supporting catenary 12 and the existing supporting contact line 13, and then installs the pulley block on the new line, and starts the anchor dropping operation.

The anchor dropping operation specifically comprises the following steps:

501) anchor falling group tightening line anchor falling

Firstly, the anchor dropping operation is carried out by adopting a non-simultaneous anchor dropping mode of the carrier cable and the contact line, wherein the anchor dropping mode is carried out firstly after the carrier cable, and the anchor dropping operation mode of the carrier cable and the contact line is the same. Before falling into the anchor, the line is manually pre-tightened, and then the line is tightened by using the pulley block. And simultaneously, the tension of the existing carrier cable 6 to be removed or the existing contact wire 5 to be removed is synchronously reduced. And stopping tightening the cable and manufacturing a terminal when the cable reaches the rated tension and the a value and the b value of the anchor falling side compensation device 4 meet the requirements. After the suspension of the catenary cable is completed, each crane group suspends the new contact line 7 on the new catenary cable 8 by using a long S-hook.

And secondly, after the new contact wire 7 is hung upside down, the contact wire is anchored, and the anchoring is carried out according to the manner of the anchor of the carrier cable.

Centers of two insulator chains on the carrier cable and the contact line are aligned, and construction allowable deviation is +/-30 mm.

502) Anchor weighing and assembling matched drop anchor

Firstly, when the anchor falling group falls in a tight line, the anchor lifting side is required to synchronously load the balance weight to the designed quantity, and the continuous stress of the compensation ropes among the compensation pulleys is required to be kept in the process of installing the balance weight. The balance weight should be stacked orderly, and the gaps thereof are staggered by 180 degrees.

Secondly, after the new line is formally anchored, an operator should adjust the values of a and b according to the installation curve and ensure that the weight string can freely move up and down without clamping stagnation when changing with the temperature.

6) Old wire dismantling

601) After the anchor is dropped, the new contact wire 7 is hung on the new carrier cable 8 by the S hook 11, the pulley hung on the existing contact wire 5 needing to be dismantled is dismantled, and the preparation for dismantling the old wire is made.

602) Installation auxiliary pulley block

After the cable is laid, the cable breaking group is provided with a pulley block at a middle anchor to assist in dismantling an old contact network, two ends of the pulley block are connected with an existing carrier cable 6 needing to be dismantled by using a wire tightener 9, a tail cable of the pulley block is laid on a steel rail and tightened, and the pulley block is fixed firmly to wait for a cable breaking command. And when the old contact line is broken, the mounting mode of the catenary pulley block is referred.

603) The anchor lifting personnel and the anchor falling personnel quickly loosen and fix the chain guide hoist on the old wire auxiliary rope 2, the tension of the old wire is gradually reduced, the existing contact wire 5 to be dismantled is loosened, the wire breaking group tightens the pulley block tail rope on the steel rail, the old contact net in a span is broken after a large sag occurs, other operation groups are sequentially broken in sections, the old contact net safely falls to the ground, the old wire rope is cut in sections according to a certain length and bundled by the recovery group, and the recovery is completed after the old wire rope is carried out of the line.

7) Middle anchor mounting

701) After the anchor falling is finished, the anchor falling responsible person can inform the anchor centering personnel that the anchor centering personnel can carry out the installation of the contact wire anchor centering.

702) The carrier cable is placed in the side groove of carrier cable seat, the central anchoring rope is placed in the side groove of supporting column, and the preformed protective strip is mounted according to the requirements. Anchor clamps in the carrier cable are arranged at positions 200mm away from two sides of a suspension point, bolts penetrate towards the field, and fastening torque 44N.M is achieved.

703) The contact wire center anchor rope F is installed in a standard position with the anchor rope 500mm from the adjacent dropper, fastening torque 44 N.M.

704) The length of the central anchoring auxiliary rope 2 is required to meet the design requirement, and the construction allowable deviation is 20 mm. The height of the lead at the middle anchor is raised by 20-50 mm. After the central anchor knot is installed, the anchor lifting group can freely move along with the temperature change after the steel wire clamp fixed on the compensation device 4 is removed.

8) Adjustment of contact net

801) Carrier cable buffer saddle

After the anchor wire clamps in the carrier cables are installed, the ladder vehicle group personnel perform saddle buffering from the central anchoring node to the anchoring direction. And reserving an offset for adjusting the wrist according to the installation curve of the wrist and the numerical requirement of the elongation rate of the cable. (in the operation, the extension quantity can be reserved according to L0.7 per mill, wherein L is the distance from the positioning point to the hard anchor or the middle anchor, and the construction allowable deviation is adjusted by the deflection value of the wrist arm +/-20 mm).

802) Positioning device mounting

Firstly, whether the compensation weight can freely move along with the temperature change is checked.

And secondly, two groups of ladder cars closest to the middle anchor are respectively stroked from the middle anchor to the lower anchor direction and are provided with a positioner and a dropper along the line surface of the contact line.

When the positioner is installed, the tooth shape of the positioner wire clamp is matched with the contact line groove, and the stress surface of the positioning wire clamp or the anchor supporting positioning clamp meets the technical requirements of products.

Adjusting the position of the positioning wire clamp to ensure that the positioning wire clamp and the positioning pipe are in the same vertical plane with the flat cantilever and the inclined cantilever, and fastening a wire clamp bolt to a standard torque by adopting a torque wrench.

803) Dropper mounting

After the carrier cable and the contact line are in place, each ladder car set is installed from a suspension point to a midspan according to the mounting position of the hanger marked on the rail waist, and the deviation of the ladder car set is adjusted in the midspan. In order to reduce the hanging string deflection phenomenon caused by the change of the sag before and after the load of the carrier cable, 3S hooks are temporarily installed at the positions which are 10 meters away from the hanging point and in the midspan respectively, wherein 950mm × 2S hooks and 650mm × 1S hooks are used for simulating the effect after the installation of the hanging strings and reducing the deviation after the installation of the hanging strings.

Secondly, bolts of the contact wire dropper clamp in the linear section penetrate from the field side to the line side, bolts of the contact wire dropper clamp in the curved section penetrate to the outer side of the curve, the mounting directions of the bolts of the carrier cable dropper clamp and the contact wire dropper clamp are opposite, and the clamp fastening torque is 25 N.M. The current-carrying ring of the contact wire dropper wire clamp is consistent with the advancing direction of the train. The installation direction of the U-shaped clamp nail is the direction of the coming vehicle of the carrier cable dropper wire clamp.

Thirdly, the hanger is vertically installed, the allowable deviation of the installation position of the hanger is +/-20 mm, a current-carrying ring of the hanger is fixed on the tail side of a bolt of the hanger wire clamp and cannot intersect with the hanger wire, and a connecting terminal and a contact line form an included angle of 45 degrees. The long piece of the stop washer of the contact wire dropper clamp is tightly clamped with the clamp body, and the two short pieces are tightly clamped with the nut.

804) Electrical connection mounting

The joints are electrically connected and arranged on two sides of the No. 2 suspension string of the working support between the anchor column and the conversion column, the distances between the joints and the suspension string are 400mm respectively, and construction allowable deviation is +/-50 mm. The length of the electrical connection line should take into account the amount of displacement due to temperature changes.

Secondly, before installation, the relative positions of the two electric connecting wire clamps are calculated according to the field temperature, the installation form of the electric connecting wire clamps is determined according to the structure height of the installation position, and the electric connecting wire clamps are S-shaped when the structure height is larger than 1 meter and are C-shaped when the structure height is smaller than 1 meter.

And thirdly, during installation, the electric connecting wires of the carrier cable and the contact wire on the same anchor section are clamped on the same vertical plane, the electric connecting parts of the electric connecting wire clamp, the carrier cable, the contact wire and the like are ground, dedusted and coated with electric compound grease, and the S-shaped or C-shaped radian of the electric connecting wire clamp, the carrier cable, the contact wire and the like faces the direction of the coming vehicle. After installation, the electric connection wire is ensured to have no phenomena of strand scattering and strand breaking, and the height of the contact wire at the wire clamp is equal to that of the adjacent dropper.

When the carrier cable and the contact line reach the designed tension and are stable, the difference value between the a value design and the installation is rechecked, the position to be broken is marked, and the a value is adjusted after the hand-operated hoist, the tightener and the steel wire rope are used for pulling the new carrier cable 8 and the new contact line 7.

And during b value adjustment, the balance weight is stringed and lifted to a height exceeding the design height by about 150mm by using the hand hoist to be connected with the double-lug wedge wire clamp at the end part of the compensation rope, and the compensation rope is tightened after the position is adjusted to complete b value adjustment.

805) Adjustment of the compensating device 4

After the carrier cable and the contact line reach the designed tension and are stable, the difference value between the a value design and the installation is rechecked and marked at the position to be broken, and the a value is adjusted after the new contact line 7 of the new carrier cable 8 is pulled by the hand hoist, the tightener and the steel wire rope.

And secondly, during the b value adjustment, a manual hoist is utilized to lift the balance weight to be about 150mm higher than the design height to be connected with a double-lug wedge-shaped wire clamp at the end of the compensation rope, and the compensation rope is tightened after the position is adjusted to complete the b value adjustment. In the adjusting process, the compensation rope needs to be prevented from rotating along the reverse stranding direction of the rope under the action of gravity of the weight string, so that the compensation rope is prevented from being stranded.

And thirdly, adjusting the spacing (a value) of the pulleys according to the current cable temperature and the length of the corresponding half anchor section. The installation height (b value) of the weight of the guide wire from the ground is in accordance with a designed installation curve, the construction allowable deviation is 0-200 mm, and the distance from the weight of the guide wire to the ground is not less than 200mm under any condition.

9) Horizontal pushing inspection and acceptance

901) When the parts of the contact network are installed, the operation is carried out according to the instruction book for installing and using products. After the adjustment is completed, flat-pushing acceptance inspection is carried out according to the anchor sections, 4 acceptance groups are arranged in each anchor section, the acceptance groups are respectively arranged from the anchor section joints and the central anchor section, construction unit personnel and 1 person in a take-over unit are respectively arranged in each group of ladder cars, and flat-pushing inspection and acceptance inspection are carried out on the installation correctness of positioning wire clamps, middle anchor wire clamps, various bolts, nuts, locking plates, split pins and the like in the construction sections and the torque fastening condition according to the railway electric power and traction power supply engineering construction quality acceptance standard and the power supply section control standard, so that the reliable electrical connection and the good bow net relationship are ensured.

902) The height of the contact line and the pull-out value of the positioning point are required to meet the design requirements, the construction allowable deviation is +/-30 mm, and when the height of the suspension point of the working support of the contact line is changed, the requirements that the general section is not more than 2 per thousand and the difficult section is not more than 4 per thousand are met.

10) End up

And after the operation is finished, cleaning construction machines, road materials and the like, cleaning the finished materials, carrying out safety inspection on the line, filling construction records by a construction responsible person, and signing on a record list by an installer.

And returning to a parking place in the stringing vehicle-mounted locking point, monitoring that the first line passes through when the line is opened, ensuring that the equipment is normal, and completely withdrawing the constructors from the site.

The invention optimizes and integrates partial process flows in the traditional construction scheme, increases the number of parallel operation processes, improves the utilization rate of the sealed skylight, effectively avoids potential safety hazards such as loads of the existing anchor posts along the direction of a line and the like, and reduces the times and the time of high-altitude operation of operators.

The invention is suitable for the construction of simultaneously replacing the carrier cable and the contact wire in the 210-minute blocking power failure point of the passenger-cargo collinear electrification line by adopting a 'small tension paying-off technology', and meets the requirements of the construction tasks of replacing a carrier cable seat, a positioning wire clamp, a lower anchor compensation device 4 and the like in the point.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. A passenger-cargo collinear carrier cable and contact line synchronous replacement construction process is characterized in that: the construction process for synchronously replacing the carrier cable and the contact line of the passenger-cargo collinear carrier cable comprises the following steps:

1) the method comprises the steps of preparing before operation, testing electricity of a contact network and adding a hanging ground wire, fixing four auxiliary ropes (2) on an anchor ring of a stay wire foundation (1) of an anchor lifting column (3), wherein the tail ends of the four auxiliary ropes (2) are provided with tighteners, two auxiliary ropes (2) are horizontally spread to a midspan position in the direction of a conversion column and used for temporary anchoring of a new line, the other two auxiliary ropes (2) are used for replacing a compensation device (4), and the tail ends of the two auxiliary ropes (2) used for replacing the compensation device (4) are respectively fixed on an existing carrier cable (6) needing to be removed and an existing contact wire (5) needing to be removed through the tighteners (9);

2) the new line is temporarily anchored, and the new contact line (7) and the new carrier cable (8) are respectively connected with two auxiliary ropes (2) for temporarily anchoring the new line to complete the temporary anchoring of the new line;

3) the new catenary (8) is temporarily suspended on the end of the flat wrist arm, and the new contact line (7) is temporarily suspended on the existing contact line (5) to be dismantled;

synchronously replacing the compensating devices (4) at two sides during the stretching of a cable, tensioning two auxiliary ropes (2) for replacing the compensating devices (4), enabling the auxiliary ropes (2) to be in a straightening state, unloading the balance weight on the balance weight rod block by block, loosening and drooping the compensating devices (4), opening and then unloading the compensating devices (4) from the position of an insulator, completely dismantling the old compensating devices (4), installing the new compensating devices (4) in situ, lifting and installing the balance weight at the anchor-lifting side in place, and piling and aligning the balance weight on the balance weight rod at the anchor-falling side;

4) the new line is formally anchored, the newly laid contact line, the carrier cable and the new compensating device (4) are connected in place, and two auxiliary ropes (2) for temporary anchoring are removed;

5) dropping the anchor;

6) removing the old line, and removing the original contact line and the carrier cable;

7) installing a middle anchor, namely installing a carrier cable and a contact line middle anchor;

8) and adjusting a contact net, namely, slowing the saddle from the central anchor knot to the anchoring direction, installing a positioning device and a hanging string, and adjusting a compensation device (4).

2. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: in the step 2), a new line is selected to be anchored at the opening side, the stringing vehicle runs to a position of a conversion column far away from an anchoring column to be stopped, a new contact line (7) and a new carrier cable (8) are manually pulled to advance to the anchoring column (3) along the direction of an existing contact line (5) to be dismantled, the new cable is connected with two auxiliary ropes (2) which are reserved on a road shoulder and used for temporarily anchoring the new line, and the temporary anchoring of the new line is completed;

or in the step 2), a new line is selected to be anchored at the cross side, the stringing vehicle runs to the position of the conversion column nearest to the anchoring column to stop, an operator respectively penetrates the new contact line (7) and the new carrier cable (8) above the existing carrier cable (6) to be dismantled and the existing contact line (5) to be dismantled of the working support, the new contact line (7) and the new carrier cable (8) are manually pulled to advance to the anchoring column (3) along the direction of the existing contact line (5) to be dismantled, and the new cable is connected with two auxiliary ropes (2) which are reserved on a road shoulder and used for temporary anchoring of the new line, so that temporary anchoring of the new line is completed.

3. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: and 3) in the process of erecting the wire rope, the new carrier cable (8) and the contact wire are always positioned at the line side of the old wire, and the new carrier cable (8) is positioned at the line side of the new contact wire (7) to prevent wire stranding.

4. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: when the anchor is dropped from the opening side of the joint in the step 5), the catenary cable is hung on the end of the wrist arm far away from the strut in the joint from the position of the central column, a new contact line (7) is hung on the existing contact line (5) to be dismantled, a worker opens a dropper of another anchor section in the joint before the anchor is dropped, and the catenary cable passes through and is installed at the correct position;

and (5) when the joint is subjected to cross side anchorage falling in the step 5), the new carrier cable (8) and the new contact line (7) are hung along the direction of the existing contact line (5) to be dismantled, and at the midspan position in front of the anchorage column (10), an operator passes the pulley block through the upper parts of the existing supporting force cable (12) and the existing supporting contact line (13) respectively, installs the pulley block on the new line and starts anchorage falling operation.

5. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: the anchor dropping operation in the step 5) adopts non-simultaneous anchor dropping of the carrier cable and the contact line, the anchor dropping mode of the carrier cable is firstly carried out and then the anchor dropping mode of the contact line is carried out, and the anchor dropping operation modes of the carrier cable and the contact line are the same; before the anchor is dropped, the line is manually pre-tightened, then the line is tightened by using the pulley block, simultaneously, the tension of the existing catenary (6) to be dismantled or the tension of the existing contact line (5) to be dismantled is synchronously reduced, the line is tightened after the line reaches the rated tension and the a value and the b value of the anchor dropping side compensation device (4) meet the requirements, and after the catenary is dropped, a new contact line (7) is hung on a new catenary (8);

and simultaneously when the wire is tightened and the anchor is dropped, the anchor lifting side synchronously loads the balance weight, and the compensation rope between the compensation pulleys is kept continuously stressed in the process of installing the balance weight.

6. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: step 6) old line dismantling comprises the following steps:

601) after the anchor falling is finished, hanging the new contact line (7) on the new catenary (8), and detaching the pulley hung on the old contact line;

602) auxiliary pulley block for installation

After the cable is laid out, a cable breaking group is arranged at a middle anchor to assist in dismantling an old contact network, two ends of the pulley block are connected with an old carrier cable through a wire tightener (9), a tail rope of the pulley block is pressed on a steel rail and tightened, the pulley block is firmly fixed to wait for a cable breaking command, and the process is carried out according to the carrier cable pulley block installation mode when the old contact cable breaks;

603) and loosening a chain guide hoist on the old wire auxiliary rope (2), gradually reducing the tension of the old wire, loosening the existing contact wire to be dismantled, tightening a pulley block tail rope on a steel rail by a wire breakage group, breaking the old contact net after the old contact net in a span has large looseness, sequentially breaking other operation groups in sections, safely landing the old contact net, cutting and bundling the old wire in sections according to a certain length by a recovery group, and carrying the old wire out of the line to finish recovery.

7. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: the adjusting compensation device (4) in the step 8) comprises the following steps:

when the carrier cable and the contact line reach the designed tension and are stable, the difference value of the a value during design and installation is rechecked and marked at the position to be broken, and the a value is adjusted after the new carrier cable (8) and the new contact line (7) are pulled by a hand-operated block, a tightener (9) and a steel wire rope;

and during b value adjustment, the balance weight is lifted to a height exceeding the design height by 150mm by using a manual hoist to be connected with the double-lug wedge wire clamp at the end part of the compensation rope, and the compensation rope is tightened after the position is adjusted to complete b value adjustment.

8. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: step 1), replacing the carrier cable seat and the positioning wire clamp in the preparation work before the operation, temporarily fixing the existing carrier cable (6) to be removed on the flat cantilever, and temporarily fixing the existing contact wire (5) and the anti-positioning pipe to be removed on the inclined cantilever.

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