220kv subsection spanning blocking net construction erection structure and construction method

Abstract

The invention discloses a 220kv segmented spanning blocking net construction erection structure and a construction method.The segmented spanning blocking net construction erection structure comprises a first spanning object, a second spanning object and a spanning net, a middle spanning frame is arranged between the first spanning object and the second spanning object, a first spanning frame is arranged on the left side of the first spanning object, and a second spanning frame is arranged on the right side of the second spanning object; a first spanning frame is arranged on the right side of the first spanning object, a second spanning frame is arranged on the right side of the second spanning object, a spanning net is arranged above the first spanning object, the second spanning object and the middle spanning frame, a standing main rope and a net pulling rope are arranged on the left side and the right side of the spanning net respectively, and the standing main rope and the net pulling rope are fixedly connected with the ground through ground anchors. According to the method, crossing construction is divided into a plurality of stages, mutual operation in the construction process is reduced, railway outage or delay caused by construction is avoided, and continuity and stability of railway operation are ensured; the multiple layers of stay wires are arranged on the two sides and the front face of the crossing frame and fixed through the high-strength steel wire ropes and the ground anchors, the stability of the crossing frame in the construction process is guaranteed, the construction risk is effectively reduced, and the safety of railway operation is further guaranteed.

Description

Technical Field

[0001] The present invention relates to a tension wire laying construction, in particular to a 220kV segmented spanning network sealing construction erection structure and a construction method, belonging to the technical field of spanning network construction. Background Art

[0002] In power line construction, especially when high-voltage transmission lines cross railways, roads or other important facilities, construction safety and efficiency are crucial issues; traditional crossing construction methods usually use simple spanning frames and wire structures, but these methods have the following disadvantages: ①. The construction process of traditional spanning frames is cumbersome and requires a lot of manpower and time, especially when crossing multiple railway lines, the construction period will be significantly extended; ②. In the construction of crossing railways, traditional construction methods are difficult to ensure a safe distance between the conductors and the railway, especially in complex railway environments, such as when crossing high-speed railways and ordinary railways at the same time, the construction risk is extremely high; ③. Large interference with railway operations: Traditional crossing construction methods often need to occupy the railway operation time window, causing great interference to the normal operation of the railway. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing technology and provide a 220kV segmented spanning network closure construction erection structure and construction method. The segmented spanning structure is adopted to divide the spanning construction into multiple stages, reducing mutual interference during the construction process and improving construction efficiency.

[0004] The technical solution adopted by the present invention to solve the technical problem is: A 220kV segmented spanning and net closure construction and erection structure comprises a first spanning object, a second spanning object and a spanning net, wherein an intermediate spanning frame is arranged between the first spanning object and the second spanning object, a first spanning frame is arranged on the left side of the first spanning object, and a second spanning frame is arranged on the right side of the second spanning object, and a spanning net is arranged above the first spanning object, the second spanning object and the intermediate spanning frame, and main supporting ropes and net pulling ropes are respectively arranged on the left and right sides of the spanning net, and the main supporting ropes and net pulling ropes are fixedly connected to the ground through ground anchors.

[0005] A side pull line is provided on the outside of the outermost supporting main rope, and the side pull line is fixedly connected to the bottom surface through a ground anchor.

[0006] The first span is a high-speed railway, and the second span is a railway; The construction method of a 220kV segmented spanning network closure construction erection structure comprises the following steps: S1. Construction preparation: ①. Prepare the tension wires required for construction. The tension wires are made of steel wire ropes. There are 4 double-layer tension wires on each side of the front of the frame and 1 double-layer tension wire on the side. The connection between the tension wires and the steel pipe frame is at the intersection of the vertical pole and the horizontal pole. The double-layer tension wires should be staggered horizontally, with a spacing of one span, to avoid horizontal V-tensioning. ② Prepare the main rope for the net closure required for construction. The main rope is made of insulated Dyneema rope. The two ends and the middle bend are tied with wire to form a 24-meter long rope loop, and then hung on the main rope with a 2t shackle; ③. Prepare the wire-laying pulleys required for construction. Install four 80kV lifting pulleys on both sides of the first and second spans as the main rope deployment pulleys for the net closure. Install four 50kV lifting pulleys on both sides of the middle span as the main rope deployment pulleys for the net closure. ④. Prepare 12 20kV transfer pulleys as net rope pulleys; ⑤. Install 4 main rope anchors and 4 guy wire anchors on the front of the first span and the second span respectively, for a total of 16. Install 1 guy wire anchor on each side of the first span and the second span, for a total of 4. Fix the main rope of the middle span to the span, install 4 guy wire anchors on the front and 1 guy wire anchor on each side, for a total of 6. S2. Erection of crossing frame: ①. The first span frame is set up on the first span, the second span frame is set up on the outside of the second span, and the middle span frame is set up between the first span and the second span; wherein: the first span frame and the second span frame are socket-type disc-type span frames, and the middle span frame is a trapezoidal disc-type scaffold; ② The vertical distance of the vertical poles of the socket-type disc-type steel pipe scaffolding is 1.80m, the horizontal distance is 1.80m, and the step distance is 1.5m. The bottom of the vertical poles is padded with 200mm wide and 6m long channel steel, and a sweeping rod is set to prevent settlement. Extending cleats are installed on both sides of the top of the frame, and the effective width of the cleats is 2m; S3. Setting of the first spanning frame and the second spanning frame guy wires: ① The guy wires of the first and second spanning frames are set in the same way, and the angle between the guy wires and the ground is not greater than 60°; ② There are 8 guy wires on both sides of the front of the first and second span frames. The guy wires are set on the first row of span frames. The first layer of guy wires is set at the junction of the vertical poles and the horizontal poles of the first layer from the top of the frame. The first layer of guy wires is on the first, fifth, tenth and fourteenth vertical poles. The second layer of guy wires is set at the junction of the horizontal poles and the vertical poles of the 11th layer from the bottom of the frame, 16.5m high. The second layer of guy wires is on the first, fifth, tenth and fourteenth vertical poles. ③. The guy wire connection points of the first and second spanning frames are both set on the side close to the first spanning object; two guy wires at each location share one ground anchor, for a total of four ground anchors; two guy wires are set on each side of the frame, and the guy wire positions are located at the top layer of the spanning frame and the connection between the 11th-layer horizontal bar and the vertical bar, respectively. The upper and lower connection points should not be in the same plane, and the two guy wires share one ground anchor; the guy wires use Φ11 steel wire ropes, and the guy wire ground anchors are all 5t, connected to the ground anchor sleeves with 50kN shackles and fixed with steel wire rope clips of corresponding specifications. Three steel wire rope clips are used for each guy wire to ensure stability and firmness; vertical diagonal rods need to be arranged for each span of the top step of the frame; ④. Setting of guy wires for the middle span frame: The angle between the guy wires and the ground is no more than 60°. There are 8 guy wires on the second layer of the front of the span frame. The guy wires are set at the junction of the first and fifth rows of vertical poles and horizontal poles from top to bottom on the north side of the second span. The connection points are set close to the second span. Each of the two guy wires uses one ground anchor, for a total of 4 ground anchors. One guy wire is set on each side of the frame. The guy wire position is located at the junction of the horizontal pole and the vertical pole on the top layer of the span frame. The guy wire ground anchors are all 5t, connected to the ground anchor sleeve with a 5t shackle and fixed with a wire rope clip of the corresponding specification. Three wire rope clips are used for each guy wire to ensure stability and firmness. S4. Arrangement of capping net rope: ① The main ropes of the spanning net are made of Φ18 Dyneema rope and Φ12 Dyneema rope respectively, and the capping rope of the spanning frame is made of Φ10 Dyneema rope, with the spacing between the capping ropes being 2m; ② The Dyneema net-closing rope is passed through a 2-ton shackle and secured to the 2-ton shackle at both ends with a rope loop. The rope loops on each end should be at least 150mm long. The shackles should be passed through the main rope with the rounded ends facing upwards. Each span requires four net-closing ropes. The net-closing ropes are secured to the Φ10 net-closing ropes every 2m along the route. ③. The horizontal lines of the capping net rope are set on the capping main rope at intervals of 7.2m-9.4m-7.2m. Both ends are fixed to the main rope with 2t shackles. The capping rope is set above the main rope. To prevent the capping rope from falling when load is generated, the two main ropes in the middle of the capping rope are fixed with a shackle; the shackle pins used for fixing are facing the ground. Since the capping direction is from north to south, the rotation direction of the pins should also be from north to south. The shackle elbow is set on the side of the main rope; S5. Setting up the main rope and top net ① Use the drone to deploy the guide rope and pass it through the span. The middle span is manually pulled from the large side span by a Φ10 Dyneema rope. A Φ12 Dyneema rope (main load-bearing rope) and a Φ10 Dyneema rope (net rope) are pulled from the middle span to the large side span in sequence. ② At the large side span frame, manually drag a Φ10 Dyneema rope (one to two) from the large side span frame, and pull a Φ18 Dyneema (main rope for the catenary) and a Φ10 Dyneema (net rope) from the small side span frame to the large side span frame; until all four catenary ropes and four net ropes are released; ③ Pull the head of the released Dyneema main rope to the anchor of the main rope of the catenary. After the main ropes and the net ropes on both sides are released, first fix the large side to the anchor; tighten the main rope at the anchor of the small side main rope, use a 3t lever hoist to adjust the sag value of the main rope, and fix the small side main rope to the anchor of the catenary. ④. The main rope and the net rope from the middle spanning frame to the second spanning frame are fixed to the frame body with a back buckle after passing through the lifting pulleys on both sides, and then fixed to the bottom layer of the scaffolding along the frame to serve as the second protection; S6. Installation of the capping net: ① The capping net is made of 25 Φ10 Dyneema mesh sheets with a length of 24 meters, spaced 2 meters apart, and connected in advance with 2T shackles. It is placed on the top of the small side frame. The contact parts of the capping net and the four main ropes of the load-bearing cables must be connected with shackles to prevent the capping net from moving between the main ropes. ② The capping net is connected to the rope nose of the net, and the distance between each net rope is controlled by the distance of the rope nose of the net; the large side is pulled, and the small side pays out the net rope evenly, keeping the net on the load-bearing rope at a consistent payout speed until the net reaches the predetermined position; S7. Selection and burial of ground anchor pits ①. Ground anchor adjustment: buried on the extension line of each load-bearing cable outside the spanning tower, use 5t ground anchor, buried 2m deep, the main rope ground anchor bridleway angle shall not exceed 45°, the guy wire ground anchor bridleway angle shall not exceed 60°, the main rope and the net rope share the same ground anchor; ② After the cable connection is completed, three rope clamps are required at the end of each cable. The spacing between the rope clamps should be no less than 6 times the diameter of the wire rope, and the opening should be pressed on the main force rope; ③. When burying, set 200-300mm thick anti-sinking soil and lay colored strips to prevent rain. Dig drainage ditches around the anchor and hang the anchor burial acceptance sign after the burial is completed; ④. At the through-line between the first span and the second span, a buckle spanning frame is set up and the net is sealed; before the through-line spanning frame is set up, the cable transition treatment is carried out in the through-line section.

[0007] The positive beneficial effects of the present invention are: 1. The present invention divides the spanning construction into multiple stages, which reduces the interactions during the construction process, avoids railway suspension or delays caused by construction, and ensures the continuity and stability of railway operations; multiple layers of guy wires are set on both sides and the front of the spanning frame, and are fixed with high-strength steel wire ropes and ground anchors to ensure the stability of the spanning frame during construction, effectively reducing construction risks.

[0008] 2. The present invention uses a drone to deploy the guide rope, which can quickly complete the deployment of the guide rope and significantly shorten the construction time. At the same time, the sag value is adjusted by manually dragging the main rope and a hand hoist, further improving the construction speed.

[0009] 3. The capping net of the present invention is made of prefabricated Dyneema rope mesh, which reduces on-site installation time and improves construction efficiency. By optimizing the design of the span frame and the layout of the capping net, a safe distance between the conductor and the railway is ensured, and the construction task can be completed efficiently within the window time of railway operation, reducing interference with the normal operation of the railway. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention provides a structure for erecting a segmented spanning closure net; Figure 2 This is a schematic diagram of the structure of the on-site crossover of the present invention; Figure 3 This is the distribution diagram of the ground anchors of the side spanning frame of the present invention; Figure 4 Distribution diagram of the ground anchors of the intermediate spanning frame of the present invention; Among them: 1-first span frame, 2-second span frame, 3-middle span frame, 4-first span frame, 5-second span frame, 6-span net, 7-supporting main rope, 8-net pulling rope, 9-ground anchor. DETAILED DESCRIPTION

[0011] The present invention will be further explained and illustrated below with reference to the accompanying drawings: Example 1, see Figure 1 A 220kv segmented spanning net construction and erection structure includes a first spanning object 1, a second spanning object 2 and a spanning net 6. An intermediate spanning frame 3 is arranged in the middle of the first spanning object 1 and the second spanning object 2, a first spanning frame 4 is arranged on the left side of the first spanning object 1, and a second spanning frame 5 is arranged on the right side of the second spanning object 2. A spanning net 6 is arranged above the first spanning object 1, the second spanning object 2 and the intermediate spanning frame 3, and a supporting main rope 7 and a net pulling rope 8 are respectively arranged on the left and right sides of the spanning net 6, and the supporting main rope 7 and the net pulling rope 8 are fixed to the ground through ground anchors 9.

[0012] A side pull line 10 is provided on the outside of the outermost supporting main rope 7, and the side pull line 10 is fixedly connected to the bottom surface through a ground anchor 9.

[0013] The first spanning structure 1 is a high-speed railway, and the second spanning structure 2 is a railway.

[0014] Example 2, see Figure 2-Figure 4 The above-mentioned construction method of a 220kV segmented spanning network closure construction erection structure includes the following steps: S1. Construction preparation: ①. Prepare the tension wires required for construction. The tension wires are made of steel wire ropes. There are 4 double-layer tension wires on each side of the front of the frame and 1 double-layer tension wire on the side. The connection between the tension wires and the steel pipe frame is at the intersection of the vertical pole and the horizontal pole. The double-layer tension wires should be staggered horizontally, with a spacing of one span, to avoid horizontal V-tensioning. ② Prepare the main rope for the net closure required for construction. The main rope is made of insulated Dyneema rope. The two ends and the middle bend are tied with wire to form a 24-meter long rope loop, and then hung on the main rope with a 2t shackle; ③. Prepare the wire-laying pulleys required for construction. Install four 80kV lifting pulleys on both sides of the first and second spans as the main rope deployment pulleys for the net closure. Install four 50kV lifting pulleys on both sides of the middle span as the main rope deployment pulleys for the net closure. ④. Prepare 12 20kV transfer pulleys as net rope pulleys; ⑤. Install 4 main rope anchors and 4 guy wire anchors on the front of the first spanning frame 4 and the second spanning frame 5, respectively, for a total of 16. Install 1 guy wire anchor on each side of the first spanning frame 4 and the second spanning frame 5, for a total of 4. Secure the main rope of the middle spanning frame 3 to the spanning frame, install 4 guy wire anchors on the front, and install 1 guy wire anchor on each side, for a total of 6. S2. Erection of crossing frame: ①. Set up the first span frame 4 on the first span 1, set up the second span frame 5 on the outside of the second span 2, and set up the middle span frame 3 between the first span 1 and the second span 2; wherein: the first span frame 4 and the second span frame 5 are socket-type disc-type span frames, and the middle span frame 3 is a trapezoidal disc-type scaffold; ② The vertical distance of the vertical poles of the socket-type disc-type steel pipe scaffolding is 1.80m, the horizontal distance is 1.80m, and the step distance is 1.5m. The bottom of the vertical poles is padded with 200mm wide and 6m long channel steel, and a sweeping rod is set to prevent settlement. Extending cleats are installed on both sides of the top of the frame, and the effective width of the cleats is 2m; S3. Setting of the first spanning frame and the second spanning frame guy wires: ① The first spanning frame 4 and the second spanning frame 5 are arranged in the same way, and the angle between the spanning wire and the ground is not greater than 60°; ②. There are 8 guy wires on both sides of the front of the first span frame 4 and the second span frame 5. The guy wires are set on the first row of the span frame. Among them: the first layer of guy wires are set at the connection point between the vertical poles and the horizontal poles of the first layer from the top of the frame. The first layer of guy wires are on the first, fifth, tenth and fourteenth vertical poles; the second layer of guy wires are set at the connection point between the horizontal poles and the vertical poles of the 11th layer from the bottom of the frame, 16.5m high; the second layer of guy wires are on the first, fifth, tenth and fourteenth vertical poles; ③. The guy wire connection points of the first span frame 4 and the second span frame 5 are both set on the side close to the first span; two guy wires at each location share one ground anchor, for a total of four ground anchors; two guy wires are set on each side of the frame, and the guy wire positions are located at the top layer of the span frame and the connection between the 11th layer crossbar and the vertical pole respectively. The upper and lower connection points should not be in the same plane, and the two guy wires share one ground anchor; the guy wires use Φ11 steel wire ropes, and the guy wire ground anchors are all 5t, connected to the ground anchor sleeves with 50kN shackles and fixed with steel wire rope clips of corresponding specifications. Three steel wire rope clips are used for each guy wire to ensure stability and firmness; vertical diagonal rods need to be arranged for each span of the top step of the frame; ④. Setting of guy wires for the middle span frame: The angle between the guy wires and the ground is no more than 60°. There are 8 guy wires on the second layer of the front of the span frame. The guy wires are set at the junction of the first and fifth rows of vertical poles and horizontal poles from top to bottom on the north side of the second span 2. The connection points are set near the side of the second span 2. Each of the two guy wires uses one ground anchor, for a total of 4 ground anchors. One guy wire is set on each side of the frame. The guy wire position is located at the junction of the horizontal pole and the vertical pole on the top layer of the span frame. The guy wire ground anchors are all 5t, connected to the ground anchor sleeve with a 5t shackle and fixed with a wire rope clip of the corresponding specification. Three wire rope clips are used for each guy wire to ensure stability and firmness. S4. Arrangement of capping net rope: ① The main ropes of the spanning net are made of Φ18 Dyneema rope and Φ12 Dyneema rope respectively, and the capping rope of the spanning frame is made of Φ10 Dyneema rope, with the spacing between the capping ropes being 2m; ② The Dyneema net-closing rope is passed through a 2-ton shackle and secured to the 2-ton shackle at both ends with a rope loop. The rope loops on each end should be at least 150mm long. The shackles should be passed through the main rope with the rounded ends facing upwards. Each span requires four net-closing ropes. The net-closing ropes are secured to the Φ10 net-closing ropes every 2m along the route. ③. The horizontal lines of the capping net rope are set on the capping main rope at intervals of 7.2m-9.4m-7.2m. Both ends are fixed to the main rope with 2t shackles. The capping rope is set above the main rope. To prevent the capping rope from falling when load is generated, the two main ropes in the middle of the capping rope are fixed with a shackle; the shackle pins used for fixing are facing the ground. Since the capping direction is from north to south, the rotation direction of the pins should also be from north to south. The shackle elbow is set on the side of the main rope; S5. Setting up the main rope and top net ① Use the drone to deploy the guide rope and pass it through the span. The middle span is manually pulled from the large side span by a Φ10 Dyneema rope. A Φ12 Dyneema rope (main load-bearing rope) and a Φ10 Dyneema rope (net rope) are pulled from the middle span to the large side span in sequence. ② At the large side span frame, manually drag a Φ10 Dyneema rope (one to two) from the large side span frame, and pull a Φ18 Dyneema (main rope for the catenary) and a Φ10 Dyneema (net rope) from the small side span frame to the large side span frame; until all four catenary ropes and four net ropes are released; ③ Pull the head of the released Dyneema main rope to the anchor of the main rope of the catenary. After the main ropes and the net ropes on both sides are released, first fix the large side to the anchor; tighten the main rope at the anchor of the small side main rope, use a 3t lever hoist to adjust the sag value of the main rope, and fix the small side main rope to the anchor of the catenary. ④. The main rope and the net rope from the middle spanning frame to the second spanning frame are fixed to the frame body with a back buckle after passing through the lifting pulleys on both sides, and then fixed to the bottom layer of the scaffolding along the frame to serve as the second protection; S6. Installation of the capping net: ① The capping net is made of 25 Φ10 Dyneema mesh sheets with a length of 24 meters, spaced 2 meters apart, and connected in advance with 2T shackles. It is placed on the top of the small side frame. The contact parts of the capping net and the four main ropes of the load-bearing cables must be connected with shackles to prevent the capping net from moving between the main ropes. ② The capping net is connected to the rope nose of the net, and the distance between each net rope is controlled by the distance of the rope nose of the net; the large side is pulled, and the small side pays out the net rope evenly, keeping the net on the load-bearing rope at a consistent payout speed until the net reaches the predetermined position; S7. Selection and burial of ground anchor pits ①. Ground anchor adjustment: buried on the extension line of each load-bearing cable outside the spanning tower, use 5t ground anchor, buried 2m deep, the main rope ground anchor bridleway angle shall not exceed 45°, the guy wire ground anchor bridleway angle shall not exceed 60°, the main rope and the net rope share the same ground anchor; ② After the cable connection is completed, three rope clamps are required at the end of each cable. The spacing between the rope clamps should be no less than 6 times the diameter of the wire rope, and the opening should be pressed on the main force rope; ③. When burying, set 200-300mm thick anti-sinking soil and lay colored strips to prevent rain. Dig drainage ditches around the anchor and hang the anchor burial acceptance sign after the burial is completed; ④. At the through-line between the first span 1 and the second span 2, a buckle spanning frame is set up and the net is sealed; before the through-line spanning frame is set up, the cable transition treatment is carried out in the through-line section.

[0015] The present invention divides the spanning construction into multiple stages, reducing the interactions during the construction process, avoiding railway suspension or delays caused by construction, and ensuring the continuity and stability of railway operations; multiple layers of guy wires are set on both sides and the front of the spanning frame, and are fixed with high-strength steel wire ropes and ground anchors to ensure the stability of the spanning frame during construction, effectively reducing construction risks.

Claims

1. A 220kV segmented spanning and sealing network construction and erection structure, comprising a first spanning object (1), a second spanning object (2) and a spanning network (6), characterized in that: An intermediate spanning frame (3) is provided between the first spanning object (1) and the second spanning object (2), a first spanning frame (4) is provided on the left side of the first spanning object (1), and a second spanning frame (5) is provided on the right side of the second spanning object (2), and a spanning net (6) is provided above the first spanning object (1), the second spanning object (2) and the intermediate spanning frame (3), and a supporting main rope (7) and a net pulling rope (8) are provided on the left and right sides of the spanning net (6), respectively, and the supporting main rope (7) and the net pulling rope (8) are fixedly connected to the ground through ground anchors (9).

2. A 220kV segmented spanning network closure construction and erection structure according to claim 1, characterized in that: A side pull line (10) is provided on the outer side of the outermost supporting main rope (7), and the side pull line (10) is fixedly connected to the bottom surface through a ground anchor (9).

3. A 220kV segmented spanning network closure construction and erection structure according to claim 2, characterized in that: The first spanning object (1) is a high-speed railway, and the second spanning object (2) is a railway.

4. The construction method of a 220kV segmented spanning network closure construction erection structure according to claim 3 is characterized in that: The steps include: S1. Construction preparation: ①. Prepare the tension wires required for construction. The tension wires are made of steel wire ropes. There are 4 double-layer tension wires on each side of the front of the frame and 1 double-layer tension wire on the side. The connection between the tension wires and the steel pipe frame is at the intersection of the vertical pole and the horizontal pole. The double-layer tension wires should be staggered horizontally, with a spacing of one span, to avoid horizontal V-tensioning. ② Prepare the main rope for the net closure required for construction. The main rope is made of insulated Dyneema rope. The two ends and the middle bend are tied with wire to form a 24-meter long rope loop, and then hung on the main rope with a 2t shackle; ③. Prepare the wire-laying pulleys required for construction. Install four 80kV lifting pulleys on both sides of the first and second spans as the main rope deployment pulleys for the net closure. Install four 50kV lifting pulleys on both sides of the middle span as the main rope deployment pulleys for the net closure. ④. Prepare 12 20kV transfer pulleys as net rope pulleys; ⑤. Set 4 main rope anchors and 4 guy wire anchors on the front of the first spanning frame (4) and the second spanning frame (5), respectively, for a total of 16. Set 1 guy wire anchor on each side of the first spanning frame (4) and the second spanning frame (5), for a total of 4. Fix the main rope of the middle spanning frame (3) on the spanning frame, set 4 guy wire anchors on the front, and set 1 guy wire anchor on each side, for a total of 6. S2. Erection of crossing frame: ①, a first spanning frame (4) is set up on the first spanning object (1), a second spanning frame (5) is set up on the outside of the second spanning object (2), and an intermediate spanning frame (3) is set up between the first spanning object (1) and the second spanning object (2); wherein: the first spanning frame (4) and the second spanning frame (5) are socket-type disc-type spanning frames, and the intermediate spanning frame (3) is a trapezoidal disc-type scaffolding; ② The vertical distance of the vertical poles of the socket-type disc-type steel pipe scaffolding is 1.80m, the horizontal distance is 1.80m, and the step distance is 1.5m. The bottom of the vertical poles is padded with 200mm wide and 6m long channel steel, and a sweeping rod is set to prevent settlement. Extending cleats are installed on both sides of the top of the frame, and the effective width of the cleats is 2m; S3. Setting of the first spanning frame and the second spanning frame guy wires: ① The first spanning frame (4) and the second spanning frame (5) have the same setting method for the guy wires, and the angle between the guy wires and the ground is not greater than 60°; ②, there are 8 tension wires on both sides of the front of the first span frame (4) and the second span frame (5), and the tension wires are set on the first row of the span frame, wherein: the first layer of tension wires are set at the junction of the vertical pole and the horizontal pole of the first layer from the top to the bottom of the frame body, and the first layer of tension wires are at the first vertical pole, the fifth vertical pole, the tenth vertical pole, and the fourteenth vertical pole; the second layer of tension wires are set at the junction of the horizontal pole and the vertical pole of the eleventh layer from the bottom to the top of the frame body, 16.5m high; the second layer of tension wires are at the first vertical pole, the fifth vertical pole, the tenth vertical pole, and the fourteenth vertical pole; ③. The connection points of the guy wires of the first span frame (4) and the second span frame (5) are both set on the side close to the first span object; two guy wires share one ground anchor at each location, for a total of four ground anchors; two guy wires are set on the sides of the frame on both sides, and the guy wire positions are located at the top layer of the span frame, the connection between the 11th layer horizontal bar and the vertical bar, and the upper and lower connection points should not be in the same plane, and the two guy wires share one ground anchor; the guy wires use Φ11 steel wire ropes, and the guy wire ground anchors are all 5t, connected to the ground anchor sleeves with 50kN shackles, and fixed with steel wire rope clips of corresponding specifications, and three steel wire rope clips are used for each guy wire to ensure stability and firmness; vertical diagonal rods need to be arranged for each span of the top step of the frame; ④. Setting of the guy wires of the middle span frame: the angle between the guy wires and the ground is not greater than 60°, and there are 8 guy wires on the second layer of the front of the span frame; the guy wires are set at the junction of the first and fifth rows of vertical poles and horizontal poles from top to bottom on the north side of the second span (2); the connection point is set on the side close to the second span (2), and 1 ground anchor is used for each of the 2 guy wires, for a total of 4 ground anchors; 1 guy wire is set on each side of the frame, and the guy wire position is located at the junction of the top horizontal pole and the vertical pole of the span frame. The guy wire ground anchors are all 5t, connected to the ground anchor sleeve with a 5t shackle, and fixed with a wire rope clip of the corresponding specification. 3 wire rope clips are used for each guy wire to ensure stability and firmness; S4. Arrangement of capping net rope: ① The main ropes of the spanning net are Φ18 Dyneema rope and Φ12 Dyneema rope respectively, and the capping rope of the spanning frame is made of Φ10 Dyneema rope, with the spacing between the capping ropes being 2m; ② The Dyneema net-closing rope is passed through a 2-ton shackle and fixed to the 2-ton shackle at both ends with a rope loop. The lashing length of each rope loop should be no less than 150mm. The shackle is passed through the main rope with the round end facing upwards. Four net-closing ropes are required for each span frame. The net-closing ropes are fixed to the Φ10 net-closing rope every 2m along the line direction. ③. The horizontal lines of the capping net rope are set on the capping main rope at intervals of 7.2m-9.4m-7.2m. Both ends are fixed to the main rope with 2t shackles. The capping rope is set above the main rope. To prevent the capping rope from falling when load is generated, the two main ropes in the middle of the capping rope are fixed with a shackle; the shackle pins used for fixing are facing the ground. Since the capping direction is from north to south, the rotation direction of the pins should also be from north to south. The shackle elbow is set on the side of the main rope; S5. Setting up the main rope and top net ① Use the drone to deploy the guide rope and pass it through the span. The middle span is manually pulled from the large side span by a Φ10 Dyneema rope. A Φ12 Dyneema rope (main load-bearing rope) and a Φ10 Dyneema rope (net rope) are pulled from the middle span to the large side span in sequence. ② At the large side span frame, manually drag a Φ10 Dyneema rope to "pull two ropes" on both sides, and pull a Φ18 Dyneema rope (main rope for the catenary) and a Φ10 Dyneema rope (net rope) from the small side span frame to the large side span frame in sequence; until all four catenary ropes and four net ropes are released; ③ Pull the head of the released Dyneema main rope to the anchor of the main rope of the catenary. After the main ropes and the net ropes on both sides are released, first fix the large side to the anchor; tighten the main rope at the anchor of the small side main rope, use a 3t lever hoist to adjust the sag value of the main rope, and fix the small side main rope to the anchor of the catenary. ④. The main rope and the net rope from the middle spanning frame to the second spanning frame are fixed to the frame body with a back buckle after passing through the lifting pulleys on both sides, and then fixed to the bottom layer of the scaffolding along the frame to serve as the second protection; S6. Installation of the capping net: ① The capping net is made of 25 Φ10 Dyneema mesh sheets with a length of 24 meters, spaced 2 meters apart, and connected in advance with 2T shackles. It is placed on the top of the small side frame. The contact parts of the capping net and the four main ropes of the load-bearing cables must be connected with shackles to prevent the capping net from moving between the main ropes. ② The capping net is connected to the rope nose of the net, and the distance between each net rope is controlled by the distance of the rope nose of the net; the large side is pulled, and the small side pays out the net rope evenly, keeping the net on the load-bearing rope at a consistent payout speed until the net reaches the predetermined position; S7. Selection and burial of ground anchor pits ①. Ground anchor adjustment: buried on the extension line of each load-bearing cable outside the spanning tower, use 5t ground anchor, buried 2m deep, the main rope ground anchor bridleway angle shall not exceed 45°, the guy wire ground anchor bridleway angle shall not exceed 60°, the main rope and the net rope share the same ground anchor; ② After the cable connection is completed, three rope clamps are required at the end of each cable. The spacing between the rope clamps should be no less than 6 times the diameter of the wire rope, and the opening should be pressed on the main force rope; ③. When burying, set 200-300mm thick anti-sinking soil and lay colored strips to prevent rain. Dig drainage ditches around the anchor and hang the anchor burial acceptance sign after the burial is completed; ④. At the through-line of the first span (1) and the second span (2), a buckle spanning frame is set up and the net is sealed; before the through-line spanning frame is set up, the cable transition treatment is carried out in the through-line section.

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