Small and miniature single-pipe tower for cable-stayed bridge and signal covering method

Abstract

The invention discloses a small and miniature single-pipe tower for a cable-stayed bridge and a signal covering method, and belongs to the technical field of communication, the small and miniature single-pipe tower comprises a small and miniature single-pipe tower body, a layer of support derrick is arranged on the small and miniature single-pipe tower body, and the small and miniature single-pipe tower body is divided into three sections including a first tower section, a second tower section and a third tower section. The adaptive problem that the height of a conventional iron tower exceeds the standard in the scene that the height of the stay wire bridge is limited to be 12 meters is solved, meanwhile, the structural stability of a tower body in the high wind pressure environment is ensured, the 11-meter tower height accurately meets the 12-meter height limiting requirement of the stay wire bridge, the wind-resistant reinforcing design that the third tower section is connected with the guardrail hoop can resist 0.85 kN / m < 2 > high wind pressure, and the sectional thick-wall steel pipe and guardrail hoop design can resist 0.85 kN / m < 2 > high wind pressure. The stability of the tower body meets the standard of strong wind once encountering 50 years, and the problems that the height of a traditional iron tower exceeds the standard and the wind resistance is insufficient are solved.

Description

Technical Field

[0001] This invention belongs to the field of communication technology, and in particular relates to a miniature single-tube tower for cable-stayed bridges and a signal coverage method thereof. Background Technology

[0002] There are two main schemes for signal coverage on existing cross-river bridges. The first is main structure pole coverage: poles are directly welded to the main structure of the bridge, such as piers and railings. Each pole has only one operator antenna installed, with power supplied by the bridge deck distribution box and transmission via fiber optic cables laid along the bridge. This scheme lacks unified planning, resulting in uneven pole spacing (typically 50-100 meters), which easily leads to weak signal areas. Furthermore, each pole requires independent power supply / transmission, resulting in a massive construction workload. The second is conventional single-tube tower coverage: conventional single-tube towers ≥15 meters high are built on land at both ends of the bridge, using high-gain antennas to cover the bridge deck. However, due to tower height limitations, the signal has difficulty penetrating the double-layered bridge deck, with severe signal attenuation on the lower highway. Additionally, the towers are far from the bridge deck, creating significant coverage blind spots in the middle area. Therefore, there are four core drawbacks: 1. Poor adaptability to special scenarios: Conventional single-tube towers exceeding 15 meters in height cannot meet the 12-meter height restriction requirement of the Changtai Bridge; 2. No reinforcement structure was designed for the high wind pressure of the guyed bridge, resulting in insufficient tower stability. 2. High construction costs: The dispersed construction of poles leads to duplicate power connection / transmission points, with an investment exceeding 200,000 yuan per kilometer. Conventional single-tube tower foundation construction requires damage to the bridge deck structure, adding extra repair costs. 3. Low maintenance convenience: The equipment is installed on high-altitude poles or tower tops, requiring the closure of the bridge deck and the use of aerial work platforms for maintenance, with a single maintenance cost exceeding 5,000 yuan and affecting traffic flow. 4. Insufficient coverage continuity: Uneven pole spacing and signal attenuation from conventional towers result in signal blind spots at the junction of the double-layer bridge deck and in the middle of the bridge, with call drop rates exceeding 5% and large fluctuations in 5G speeds. Summary of the Invention

[0003] The purpose of this invention is to address the problems of poor stability, high cost, difficult operation and maintenance, and low maintenance efficiency of signal coverage equipment for cross-river bridges, and to propose a miniature single-tube tower and signal coverage method for cable-stayed bridges.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A miniature single-tube tower for cable-stayed bridges includes a miniature single-tube tower with a support strut layer on it. The miniature single-tube tower is divided into three sections: tower section one, tower section two, and tower section three.

[0006] As a further description of the above technical solution:

[0007] The first tower section is a seamless steel pipe with a length of 4m, a bottom diameter of 194mm, an top diameter of 194mm, a wall thickness of 12mm, and a weight of 321.62KG.

[0008] As a further description of the above technical solution:

[0009] The second tower section is a seamless steel pipe with a length of 3.5m, a bottom diameter of 203mm, an top diameter of 203mm, a wall thickness of 16mm, and a weight of 372.97KG.

[0010] As a further description of the above technical solution:

[0011] The third tower section is a seamless steel pipe with a length of 3.5m, a bottom diameter of 219mm, an top diameter of 219mm, a wall thickness of 20mm, and a weight of 480.41KG.

[0012] As a further description of the above technical solution:

[0013] The number of miniature single-tube towers is nine, and the nine miniature single-tube towers are set up on both sides of the highway in a "Z" shape.

[0014] As a further description of the above technical solution:

[0015] The number of support rods is four, with two long and two short rods arranged in an "X" shape around the miniature single-tube tower.

[0016] As a further description of the above technical solution:

[0017] The miniature single-tube tower is equipped with two support poles at its base.

[0018] As a further description of the above technical solution:

[0019] The top of the miniature single-tube tower is equipped with four antennas, which are arranged in an "X" shape with two long and two short antennas.

[0020] A signal coverage method for a miniature monotube tower used in a cable-stayed bridge includes the following steps:

[0021] S1. The steel foundation of the reserved bridge is connected to the small and micro single-tube tower using 8.8 grade 8M33 anchor bolts to reduce the amount of tower foundation construction work.

[0022] S2. Considering the high wind pressure on the bridge throughout the year, the tower wall thickness will be increased, which will increase the safety risk.

[0023] S3. Considering the high height of the bridge and the high wind pressure throughout the year, a clamp is added to connect the third tower section to the bridge railing to increase the safety of the tower.

[0024] S4. At a height of 250mm from the bottom of the micro-tower, add two 2-meter support poles for installing operator equipment to reduce the load on the micro-tower.

[0025] S5. Nine small single-tube towers were constructed and set up in a "Z" shape on both sides of the expressway. Eleven poles have been installed at various locations on the lower-level highway side to achieve high-quality public network signal coverage on the double-layer bridge deck, ultimately realizing cross-industry sharing between the communications industry and the double-layer bridge industry.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. This invention solves the compatibility problem of conventional tower height exceeding the 12-meter height limit for guyed bridges, while ensuring the structural stability of the tower body under high wind pressure. The 11-meter tower height precisely matches the 12-meter height limit requirement of guyed bridges. The wind-resistant reinforcement design connecting the three tower sections to the guardrail clamps, and the segmented thick-walled steel pipe + guardrail clamp design can withstand 0.85kN / m 2 High wind pressure ensures the tower's stability meets the 50-year return period gale standard, solving the problems of excessive height and insufficient wind resistance of traditional iron towers.

[0028] 2. This invention solves the problems of duplicate power connection / transmission points and high construction costs caused by the traditional decentralized construction of poles, enabling multi-operator co-construction and sharing. It also solves the problems of high maintenance difficulty and high cost caused by high-altitude equipment installation. By using prefabricated foundations, the amount of construction work is reduced by 30%. Multiple operators share tower, power connection and transmission resources, reducing the investment per kilometer from 200,000 yuan to less than 140,000 yuan, and the overall cost is reduced by more than 30%. At the same time, it avoids repeated construction, shortens the construction period by 50%, and the equipment is centrally installed on the ground pole at the base of the tower. Maintenance does not require high-altitude operations or closure of the bridge deck. The single maintenance time is shortened from 4 hours to 1 hour, reducing maintenance costs and improving the efficiency of later maintenance.

[0029] 3. This invention solves the problem of uneven signal coverage and blind spots on the double-layer bridge deck, and achieves continuous signal coverage for highways, intercity railways and first-class highways in a "three-in-one" manner. The upper layer has 9 "Z"-shaped single-tube towers and the lower layer has 11 shared poles, achieving full bridge deck coverage of 10.03 kilometers. The signal blind spot rate is reduced from 15% in the traditional solution to 0, the 5G speed is stable at over 300Mbps, and the call drop rate is ≤0.5%, meeting the communication needs of the "three-in-one" traffic scenario. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a technical solution: a miniature single-tube tower for cable-stayed bridges, comprising a miniature single-tube tower, characterized in that a support frame is provided on the miniature single-tube tower, and the miniature single-tube tower is divided into three sections, namely tower section one, tower section two and tower section three.

[0032] The first tower section is a seamless steel pipe with a length of 4m, a bottom diameter of 194mm, an top diameter of 194mm, a wall thickness of 12mm, and a weight of 321.62KG.

[0033] The second tower section is a seamless steel pipe with a length of 3.5m, a bottom diameter of 203mm, an top diameter of 203mm, a wall thickness of 16mm, and a weight of 372.97KG.

[0034] The third tower section is a seamless steel pipe with a length of 3.5m, a bottom diameter of 219mm, an top diameter of 219mm, a wall thickness of 20mm, and a weight of 480.41KG.

[0035] The number of miniature single-tube towers is nine, and the nine miniature single-tube towers are set on both sides of the highway in a "Z" shape to achieve continuous coverage of the highway at intervals of 500-600 meters.

[0036] The number of support rods is four, with two long and two short rods arranged in an "X" shape around the miniature single-tube tower.

[0037] The miniature single-tube tower is equipped with two support poles at its base, which are positioned 250mm above the tower bottom. These poles are used to centrally install RRUs, power supplies, and transmission equipment, thereby improving maintenance convenience.

[0038] The top of the miniature single-tube tower is equipped with four antennas arranged in an "X" shape with two long and two short antennas. This supports the shared installation of antennas by multiple operators, avoiding signal interference. The upper and lower layer coverage is designed in a coordinated manner. Through optimization of antenna tilt angle / direction angle, the signal overlap of the double-layer bridge deck is achieved to be ≥90%.

[0039] A signal coverage method for a miniature monotube tower used in a cable-stayed bridge includes the following steps:

[0040] S1. The steel foundation of the reserved bridge is connected to the small and micro single-tube tower using 8.8 grade 8M33 anchor bolts to reduce the amount of tower foundation construction work.

[0041] S2. Considering the high wind pressure on the bridge throughout the year, the tower wall thickness will be increased, which will increase the safety risk.

[0042] S3. Considering the high height of the bridge and the high wind pressure throughout the year, the third tower section is connected to the bridge railing with a clamp to increase the safety of the tower. The tower load is optimized (axial force 15.12KN, shear force 15.06KN, bending moment 127.34kN·m) to adapt to the high wind pressure environment.

[0043] S4. At a height of 250mm from the bottom of the micro-tower, add two 2-meter support poles for installing operator equipment to reduce the load on the micro-tower.

[0044] S5. Nine small-scale single-tube towers were constructed and set up in a "Z" shape on both sides of the highway. Eleven poles have been installed at various locations on the lower-level highway side to achieve high-quality public network signal coverage on both bridge decks. This ultimately enables cross-industry sharing between the communications industry and the double-layer bridge industry. The 11 shared poles on the lower highway side share supporting facilities with the upper towers, achieving full coverage in a "three-in-one" scenario. The solution combines centralized equipment installation with layered coverage, balancing coverage quality and operation and maintenance efficiency. Furthermore, the centralized arrangement of fiber distribution boxes and power distribution boxes improves fault diagnosis efficiency by 60%.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A miniature monotube tower for cable-stayed bridges, comprising a miniature monotube tower, characterized in that, The miniature single-tube tower is equipped with a support pole. The miniature single-tube tower is divided into three sections: tower section one, tower section two, and tower section three.

2. A miniature single-tube tower for cable-stayed bridges according to claim 1, characterized in that, The first tower section is a seamless steel pipe with a length of 4m, a bottom diameter of 194mm, an top diameter of 194mm, a wall thickness of 12mm, and a weight of 321.62KG.

3. A miniature single-tube tower for cable-stayed bridges according to claim 1, characterized in that, The second tower section is a seamless steel pipe with a length of 3.5m, a bottom diameter of 203mm, an top diameter of 203mm, a wall thickness of 16mm, and a weight of 372.97KG.

4. A miniature single-tube tower for cable-stayed bridges according to claim 1, characterized in that, The third tower section is a seamless steel pipe with a length of 3.5m, a bottom diameter of 219mm, an top diameter of 219mm, a wall thickness of 20mm, and a weight of 480.41KG.

5. A miniature single-tube tower for cable-stayed bridges according to claim 1, characterized in that, The number of miniature single-tube towers is nine, and the nine miniature single-tube towers are set up on both sides of the highway in a "Z" shape.

6. A miniature single-tube tower for cable-stayed bridges according to claim 1, characterized in that, The number of support rods is four, with two long and two short rods arranged in an "X" shape around the miniature single-tube tower.

7. A miniature single-tube tower for cable-stayed bridges according to claim 1, characterized in that, The miniature single-tube tower is equipped with two support poles at its base.

8. A miniature single-tube tower for cable-stayed bridges according to claim 1, characterized in that, The top of the miniature single-tube tower is equipped with four antennas, which are arranged in an "X" shape with two long and two short antennas.

9. A signal coverage method for a miniature single-tube tower used in a cable-stayed bridge according to any one of claims 1-8, characterized in that, Specifically, the following steps are included: S1. The steel foundation of the reserved bridge is connected to the small and micro single-tube tower using 8.8 grade 8M33 anchor bolts to reduce the amount of tower foundation construction work. S2. Considering the high wind pressure on the bridge throughout the year, the tower wall thickness will be increased, which will increase the safety risk. S3. Considering the high height of the bridge and the high wind pressure throughout the year, a clamp is added to connect the third tower section to the bridge railing to increase the safety of the tower. S4. At a height of 250mm from the bottom of the micro-tower, add two 2-meter support poles for installing operator equipment to reduce the load on the micro-tower. S5. Nine small single-tube towers were constructed and set up in a "Z" shape on both sides of the expressway. Eleven poles have been installed at various locations on the lower-level highway side to achieve high-quality public network signal coverage on the double-layer bridge deck, ultimately realizing cross-industry sharing between the communications industry and the double-layer bridge industry.