CN108590318B

CN108590318B - Construction method of crossing protective equipment and method for crossing construction protection above line

Info

Publication number: CN108590318B
Application number: CN201810451275.5A
Authority: CN
Inventors: 黄松和; 周国华; 李倩; 吴向东; 黄志辉; 田宝祯; 刘翔云
Original assignee: Guangzhou Southwest Jiaotong University Research Institute Co ltd
Current assignee: Guangzhou Southwest Jiaotong University Research Institute Co ltd
Priority date: 2018-05-11
Filing date: 2018-05-11
Publication date: 2020-04-14
Anticipated expiration: 2038-05-11
Also published as: CN108590318A

Abstract

The invention provides a construction method for crossing over construction protection equipment and a method for crossing over construction above a protected line. The construction method comprises the following steps: fixing the equipment to be unfolded; then, rotating, forming a net hanging space between two adjacent cross beams, and then adjusting the cross beams and the auxiliary tower; a protective net is arranged between two adjacent cross beams; then, erecting the main tower; in the blocking time, enabling the beam to cross the protected line; lowering the auxiliary tower to support the cross beam; the beam is fixed with the main tower and the auxiliary tower respectively. The construction method of the crossing construction protection equipment provided by the invention has simple steps, does not need manual frame building or manual traction of a guide rope, and has short construction time and low construction cost; the construction process can be completed in a short blocking time, and the safety of crossing construction can be ensured.

Description

Construction method of crossing protective equipment and method for crossing construction protection above line

Technical Field

The invention relates to the field of power transmission line construction, in particular to a construction method for crossing construction protection equipment and a method for crossing construction above a protected line.

Background

With the comprehensive construction and the investment operation of domestic railways, the construction of newly-built power transmission line engineering crossing railways is inevitable. In order to guarantee the railway operation safety, according to the relevant regulations of railway departments, when the cross-track construction operation is carried out above the railway, corresponding protection operation must be carried out, and dangerous operation is only allowed to be carried out in a skylight point.

At present, the cross-line construction protection operation is to manually build scaffolds on two sides of a railway, and after the building is completed, a traction rope and a protective net are manually pulled in a plurality of skylight points. However, the crossing structure of this structure has a large limitation in the height and the crossing distance, and the overall strength and stability of the crossing structure are poor because the bending resistance and the pressure resistance of the single member are small. Meanwhile, the crossing frame needs more materials and manpower, and has large transportation workload and longer time consumption. Furthermore, the crossing construction mode is only suitable for the condition that the road surfaces on two sides of the railway are good, and if one side of the crossing construction mode is not flat, the method for manually building the two sides cannot be carried out. With the continuous improvement of the engineering construction speed in China, the defects of the construction mode are increasingly obvious.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to provide a construction method for spanning construction protection equipment, which has the advantages of convenience and quickness in construction, short period, low cost and the like.

The second purpose of the invention is to provide a method for the over-route construction above the protected line, which comprises the construction method of the over-route construction protection equipment.

In order to achieve the above purpose of the present invention, the following technical solutions are adopted:

a construction method of spanning construction protective equipment, the construction method comprising the steps of:

fixing the equipment to be unfolded; then, rotating, forming a net hanging space between two adjacent cross beams, and then adjusting the cross beams and the auxiliary tower; a protective net is arranged between two adjacent cross beams; then, erecting the main tower; in the blocking time, enabling the beam to cross the protected line; lowering the auxiliary tower to support the cross beam; the beam is fixed with the main tower and the auxiliary tower respectively.

Preferably, in the construction method of the spanning construction protection equipment, the protection equipment is transported and prepared on one side of the protected line, and frame structures are formed on two sides of the protected line to realize protection.

Preferably, in the construction method of crossing construction protection equipment according to the present invention, the fixing the device to be deployed includes:

and after the supporting leg arm is unfolded, the supporting leg is placed downwards, the base is leveled, and then the supporting leg is fixed with the supporting leg arm and the base respectively.

Preferably, in the construction method of the spanning construction protection equipment according to the present invention, the adjusting beam and the sub-tower include:

and pulling out the second-stage cross beam, and fixing the first-stage cross beam and the second-stage cross beam at the joint.

the length of the auxiliary tower is increased at the tail part of the auxiliary tower, and the length of the auxiliary tower meets the height requirement.

Preferably, in the construction method of the spanning construction protective equipment, the construction method further comprises the step of installing a buffering energy-absorbing device at the beam hanging net before installing the protective net.

Preferably, in the construction method of the crossing construction protection equipment, the construction method further includes:

the relative position of two adjacent cross beams is kept fixed during erection of the main tower.

Preferably, in the construction method of the crossing construction protection equipment according to the present invention, the installation side member includes:

and (4) manually using a hoisting tool, and installing and fixing the longitudinal beam between the adjacent cross beams.

Meanwhile, the invention also provides spanning construction protection equipment obtained by the construction method.

Further, the invention also provides a method for the cross-line construction above the protected line, which comprises the step of using the cross-construction protection equipment.

Compared with the prior art, the invention has the beneficial effects that:

the construction method of the crossing construction protection equipment provided by the invention has simple steps, does not need manual frame building or manual traction of a guide rope, and has short construction time and low construction cost; the construction process can be completed in a short skylight point, and the safety of crossing construction can be ensured.

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.

FIG. 1 is a schematic flow chart illustrating a ground leveling step of a construction method of a spanning construction protection device according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart illustrating a leg opening step of a construction method for spanning construction protection equipment according to an embodiment of the present invention;

FIG. 3 is a schematic flow chart of steps of a construction method for spanning construction protection equipment, which is provided by the embodiment of the invention, for adjusting a cross beam and an auxiliary tower;

FIG. 4 is a schematic flow chart of steps of a construction method for spanning construction protection equipment, adjusting a cross beam and an auxiliary tower, according to an embodiment of the present invention;

FIG. 5 is a schematic flow chart of steps of a construction method for spanning construction protection equipment, adjusting a cross beam and an auxiliary tower, according to an embodiment of the present invention;

FIG. 6 is a schematic view of a construction method of spanning a construction protection device according to an embodiment of the present invention;

FIG. 7 is a schematic flow chart illustrating a simultaneous erection step of two main towers of the construction method for crossing over the construction protection equipment according to the embodiment of the present invention;

FIG. 8 is a schematic flow chart illustrating steps of erecting a main tower according to a construction method for spanning a construction protection device according to an embodiment of the present invention;

FIG. 9 is a schematic flow chart illustrating a synchronous rotation step of two cross beams of the construction method of the spanning construction protection equipment according to the embodiment of the present invention;

FIG. 10 is a schematic view (front view) of a construction method cross beam rotation completion structure of the spanning construction protection equipment according to the embodiment of the present invention;

fig. 11 is a schematic view (perspective view) of a construction method of spanning construction protection equipment according to an embodiment of the present invention;

FIG. 12 is a schematic flow chart illustrating the erection step of the auxiliary tower according to the construction method of the spanning construction protection equipment according to the embodiment of the present invention;

fig. 13 is a schematic view (front view) of a construction method of crossing over construction protection equipment according to an embodiment of the present invention, illustrating a secondary tower erecting completion structure;

fig. 14 is a schematic view (isometric view) of a construction method of crossing construction protection equipment, which is provided by the embodiment of the invention, of a secondary tower erecting completion structure;

FIG. 15 is a schematic flow chart illustrating a sub-tower descending procedure of a construction method for spanning construction protection equipment according to an embodiment of the present invention;

FIG. 16 is a schematic view of a construction method for spanning a construction protection device according to an embodiment of the present invention illustrating a structure for completing descending of an auxiliary tower;

FIG. 17 is a schematic (elevation) view of a construction truss structure spanning the construction equipment;

fig. 18 is a structural truss structure spanning a construction safety equipment (isometric view).

In the figure 17, 1-main tower, 2-cross beam, 3-auxiliary tower, 4-protective net, 5-landing leg, 6-slewing mechanism, 7-base, 8-transport vehicle, 9-main tower amplitude-variable oil cylinder, 10-cross beam amplitude-variable oil cylinder, 11-auxiliary tower amplitude-variable oil cylinder and 12-auxiliary tower lifting mechanism.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

In view of the defects of long construction time, large consumption of manpower and material resources, high cost and the like of the conventional over-line construction method, the invention particularly provides a novel construction method of over-construction protection equipment to solve the problems in the conventional method.

The crossing construction protection equipment can be used for crossing construction protection in engineering environments such as railways, electric power high-voltage lines, highways, bridges and the like, namely, the protected lines can be railways, electric power high-voltage lines, highways and bridges.

Specifically, the construction method of the crossing construction protection equipment provided by the invention comprises two stages of preparation and skylight point;

the preparation stage can be carried out in the period of non-blocking time (non-skylight point), so that the operation of the train cannot be influenced in the early preparation process of the construction method, and the spanning construction protection equipment can be formed in the short skylight point.

Further, the construction method of the crossing construction protection device of the invention is specifically described by taking the protection device for crossing railway construction as an example with reference to the following drawings:

the conditioning phase comprises the following steps:

(1) leveling the ground, and placing equipment (equipment to be unfolded) to a specified place;

referring to fig. 1, in this step, firstly, the ground of the area to be constructed is leveled, so that the equipment can be more stably supported on the ground after being unfolded;

the equipment is then placed at the site, in which step the equipment to be deployed (mainly the telescopic tower, and the corresponding slewing, supporting and telescopic drives including cylinders) is transported to the construction site, preferably by means of transport vehicles;

preferably, the equipment has at least two sets, and the at least two sets of equipment have the same structure and synchronously run in a further process.

(2) Opening support leg

Referring to fig. 2, after the equipment is placed, the preparation work is started, the supporting leg arm oil cylinder is operated to unfold the supporting leg arm to a designated angle, the supporting leg is lowered, and the base is leveled; after the supporting legs move in place, a supporting leg swing arm fixing rod and a supporting leg fixing pin are installed, and the supporting legs are fixed with the supporting leg arms and the base respectively.

The number of the supporting leg arms is preferably 4, and the supporting leg arms are respectively and symmetrically arranged on two sides of the base; and the supporting arm plays a role of a base support.

After the supporting arms are used for supporting, the vehicle can be moved away for carrying subsequent equipment.

Different from the traditional hoisting construction mode, the vehicle only plays a role in equipment transportation, after the equipment is transported to a specified place and erected, the vehicle can be evacuated from the construction site, and the subsequent actions are independently completed by the equipment supported on the ground;

in the traditional hoisting method, large special vehicles need to be hoisted continuously or used as supports for construction, and the development of the large special vehicles with required special structures can be avoided by adopting the spanning type protective equipment (because the spanning type protective equipment has a special structure, the existing hoisting equipment cannot finish the construction of the protective equipment), and meanwhile, the special vehicles do not need to be stored in a specific field.

(3) Adjusting beam and auxiliary tower

After the equipment is fixed, the adjustment of the beam and the auxiliary tower is carried out (the telescopic tower comprises three parts, namely a main tower, the beam and the auxiliary tower which are connected in sequence), and the step comprises three processes:

① referring to fig. 3, the turning system is started, the turning mechanism (the turning mechanism is arranged on the base and bears the telescopic tower) and the upper equipment (mainly including the telescopic tower) turn a small angle (the upper equipment is initially fixed and keeps parallel to the railway, after turning, the upper equipment and the railway form a small included angle, and the two upper equipment synchronously turn the same angle), so that a net hanging space can be formed between the two beams, at the moment, the telescopic tower still keeps a large distance with the railway, and normal train passing is prevented from being influenced;

in addition, because the length of the cross beam and the length of the auxiliary tower are long, the interference of two machines when the auxiliary tower is lengthened needs to be prevented, so that two devices are required to synchronously rotate to avoid the interference;

② referring to FIG. 4, the second section of the beam is pulled out manually by using a tool, and a connecting plate and a bolt are added at the joint between the first-stage beam and the second-stage beam;

the beam part of the telescopic tower consists of two telescopic sections of structures, namely a first-stage beam and a second-stage beam;

③ referring to FIG. 5, the auxiliary tower is lengthened at its tail end to make the length of the auxiliary tower meet the height requirement;

in this step, by increasing the length of the sub-tower, the sub-tower can be enough to support the cross beam to keep horizontal, and a stable support structure is formed.

The main tower, the cross beam and the auxiliary tower are arranged in a set of equipment through a telescopic structure, and the other key point of the invention is that.

For traditional over-the-road construction protection, construction needs to be carried out on two sides of a railway, and the method can be implemented under the condition of good working conditions on two sides of the railway (although the method is high in cost);

in many cases, however, especially for ordinary railroads, complex terrains are often traversed, and in these areas, only one side is often a relatively flat road surface, while the other side may be a complex topography such as a valley, a river or a steep slope, a mountain wall, etc. In these areas, the traditional method cannot be adopted to carry out the cross-line construction protection operation.

In the invention, the crossing construction protection equipment can be set up only by depending on a relatively flat road surface on one side of the railway, the vehicle conveys the equipment to a specified place on one side of the railway, and the main tower supported by the supporting arms realizes the railway crossing of the cross beam and the auxiliary tower through rotation without manual intervention;

the auxiliary tower used for supporting the other end of the cross beam can fall down automatically under the driving of the oil cylinder and is supported by the supporting block arranged on the ground on the other side of the railway, so that the spanning type protective equipment is directly established; and no matter what kind of complicated topography, set up the supporting shoe that can play certain supporting role, still realize comparatively easily.

(4) Hanging net

Referring to fig. 6, in this step, a buffering energy-absorbing device is added at the position of the beam where the net is to be hung, so as to absorb the impact force of the falling object, and further enhance the protection effect; then, the protection net is mounted on two crossbeams (the two opposite sides of the protection net are respectively mounted on the corresponding crossbeams), and the protection net between the crossbeams is in a parallelogram shape.

(5) The two main towers are erected simultaneously to keep the beam parallel to the ground

Referring to fig. 7, after the installation of the protection net is completed, the luffing cylinder of the main tower and the luffing cylinder of the cross beam work synchronously, the main tower starts to erect, the cross beam is always kept parallel to the ground under the pushing of the luffing cylinder, and the protection net keeps the original state between the two cross beams (i.e., the original parallelogram is kept, and the relative positions of the two cross beams are kept unchanged).

After erecting, the main tower frame and the revolving frame are connected by the connecting and fixing device, and the cross beam and the main tower frame are connected, so that the reliable connection between the equipment parts is realized.

(6) Completion of erecting main tower

Referring to fig. 8, after the main tower is erected, the preparation phase is completed, and the skylight is waited for the skylight to be operated in the skylight phase.

The skylight point stage includes:

(7) two machine crossbeams rotate synchronously, span and display

Referring to fig. 9, in the skylight point time, the two slewing systems are started and synchronously rotated until the beam is perpendicular to the railway direction, so as to complete the action of crossing the railway;

meanwhile, the protective net is uniformly arranged between the two cross beams under the traction of the cross beams;

8. the beam rotation is completed.

Referring to fig. 10 and 11, about 2 min is required for the beam to start rotating to finish.

9. Erecting auxiliary tower

Referring to fig. 12, the sub-tower is pushed by the sub-tower luffing cylinder to start to be erected from the inside of the cross beam and finally to be perpendicular to the cross beam.

10. Erecting the auxiliary tower

Referring to fig. 13 and 14, the secondary tower is erected to completion, requiring about 2 min.

11. The secondary tower descends.

Referring to fig. 15, the auxiliary tower lifting device is started to lower the auxiliary tower;

12. completion of lowering of sub-tower

Referring to fig. 16, when the auxiliary tower descends to contact the supporting blocks and can bear the weight of the upper devices such as the cross beam together with the main tower, the auxiliary tower is completely descended.

After the auxiliary tower is in place, the beam and the main tower and the beam and the auxiliary tower need to be fixed manually, and the longitudinal beam needs to be installed manually by using a hoisting tool.

The structure of the spanning construction protection equipment obtained by the steps is shown in fig. 17 and 18, and comprises the following steps:

the tower comprises a main tower 1, cross beams 2 and an auxiliary tower 3 which are sequentially and fixedly connected, wherein a protective net is arranged between the two cross beams 2 which are symmetrically arranged;

meanwhile, the main tower 1 is arranged on a slewing mechanism 6, the slewing mechanism is arranged on a base 7, and the base 7 is supported by supporting legs 5;

the main tower 1 is driven by a main tower amplitude variation oil cylinder 9, the crossbeam 2 is driven by a crossbeam amplitude variation oil cylinder 10, and the auxiliary tower 3 is driven by an auxiliary tower amplitude variation oil cylinder 11 to rise and fall and is driven by an auxiliary tower lifting mechanism 12 to lift.

Furthermore, the invention can also provide a method for the line crossing construction above the protected line, wherein in the method, firstly, the construction of crossing construction protective equipment is carried out according to the method, and then, the crossing construction is carried out by taking the crossing equipment as protective equipment, so that the protected line is prevented from being damaged by falling objects in the line pulling construction process.

Example 1

The construction of crossing construction protection equipment is carried out near a railway line in a certain place in the south, and the concrete steps are as follows:

1. after the ground of a region to be constructed is leveled, two pieces of equipment are respectively conveyed to an appointed position by a transport vehicle, the two transport vehicles are arranged on the same side of a rail and are parallel to the rail, and the distance between the two transport vehicles is about 18 m;

2. and respectively operating the supporting leg arm oil cylinders on the two devices, unfolding the supporting leg arms to a specified angle, lowering the supporting legs and leveling the base. And after the supporting legs act in place, a supporting leg swing arm fixing rod and a supporting leg fixing pin are installed.

3. Adjusting beam and auxiliary tower

3.1 synchronously starting the rotating systems of the two devices, synchronously rotating the rotating frame and the upper device by a smaller angle, and forming a net hanging space between the two beams;

3.2 manually using tools to respectively pull out the second sections of the two telescopic tower beams, and additionally arranging a connecting plate and a bolt at the joint between the first-level beam and the second-level beam to enable the length of the beam to reach 18 m;

3.3 a plurality of sections are respectively added at the tail parts of the two telescopic tower auxiliary towers, so that the height requirements are met.

4. Hanging net

The buffering energy absorption devices are respectively added at the net hanging positions of the two cross beams, then the customized protective net is installed on the two machine cross beams, and the installed protective net is in a parallelogram shape.

5. Two main towers are erected simultaneously, and the cross beam keeps parallel

After the protective net is installed, the main tower supporting oil cylinder and the cross beam supporting oil cylinder work synchronously, the main tower frame starts to stand up, the cross beam is always kept parallel to the ground under the pushing of the supporting oil cylinder, and the protective net is kept in an original state between the two cross beams. After erecting, the main tower frame and the revolving frame are connected by the connecting and fixing device, and the cross beam and the main tower frame are connected, so that the reliable connection between the equipment parts is realized.

6. Completion of erecting main tower

7. Two machine crossbeams rotate synchronously, span and display

And in the skylight point time, starting the rotating systems, synchronously rotating the two rotating systems until the cross beams are vertical to the railway direction, finishing the crossing action, and meanwhile, uniformly arranging the protective net between the two cross beams under the traction of the cross beams.

8. The beam rotation is completed.

9. The auxiliary tower is erected and is pushed by the auxiliary tower amplitude variation oil cylinder to be erected from the inside of the cross beam and finally is perpendicular to the cross beam.

10. And finishing erecting the auxiliary tower.

11. Descending the auxiliary tower; starting the auxiliary tower lifting device to lower the auxiliary tower;

12. completion of lowering of sub-tower

And when the auxiliary tower descends to be in contact with the supporting block and can bear the weight of the upper devices such as the cross beam and the like together with the main tower, finishing the descending of the auxiliary tower.

After the auxiliary tower is in place, fixing between the cross beam and the main tower and between the cross beam and the auxiliary tower are finished manually, and the longitudinal beam is installed manually by using a hoisting tool.

While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

1. A construction method for spanning construction protection equipment is characterized by comprising the following steps:

fixing the equipment to be unfolded; then, rotating, forming a net hanging space between two adjacent cross beams, and then adjusting the cross beams and the auxiliary tower;

a protective net is arranged between two adjacent cross beams; then, erecting the main tower;

in the blocking time, enabling the beam to cross the protected line;

lowering the auxiliary tower to support the cross beam;

respectively fixing the cross beam with the main tower and the auxiliary tower;

stride across construction protective equipment includes:

the device comprises a main tower, cross beams and an auxiliary tower which are sequentially and fixedly connected, wherein a protective net is also arranged between the two cross beams which are symmetrically arranged;

meanwhile, the main tower is arranged on a slewing mechanism, the slewing mechanism is arranged on a base, and the base is supported by supporting legs;

the main tower is driven by a main tower amplitude variation oil cylinder, the crossbeam is driven by a crossbeam amplitude variation oil cylinder, and the auxiliary tower is driven by an auxiliary tower amplitude variation oil cylinder to erect and is driven by an auxiliary tower lifting mechanism to lift;

the protective equipment is transported and prepared on one side of the protected line, and frame structures are formed on two sides of the protected line to realize protection.

2. The construction method across construction safety equipment of claim 1, wherein said securing the equipment to be deployed comprises:

3. The construction method across construction safety equipment of claim 1, wherein the adjusting beam and sub-tower comprises:

4. The construction method across construction safety equipment of claim 1, wherein the adjusting beam and sub-tower comprises:

5. The construction method of crossing construction protective equipment according to claim 1, further comprising the step of installing a buffering energy-absorbing device at the beam hanging net before installing the protective net.

6. The construction method across construction safety equipment according to claim 1, further comprising:

7. The construction method of spanning construction protective equipment according to claim 1, wherein installing the longitudinal beam comprises:

8. A method for cross-line construction protection above a protected line, which is characterized by using the construction method of the cross-line construction protection equipment in claim 1.