500 kilovolt narrow-base tower capable of passing through goaf and reducing foundation earthwork digging and filling amount

Abstract

The utility model relates to a 500 kilovolt narrow base tower capable of passing through a goaf and reducing foundation earthwork digging and filling amount, which comprises tower legs above a tower base body, a tower body detachably mounted at the top ends of the tower legs, a tower head detachably mounted at the top end of the tower body, an iron tower foundation fixedly mounted at the bottom ends of the tower legs, and a composite foundation plate fixedly mounted at the bottom end of the iron tower foundation. The composite foundation plate is fixedly connected with the tower base body, the overall height of the tower legs, the tower body and the tower head is the total height of the iron tower, the bottom end width of the tower legs is the width of an opening in the root of the iron tower, and the ratio of the total height of the iron tower to the width of the opening in the root of the iron tower is larger than 6: 1 and smaller than 10: 1. The joint of the tower head and the tower body is an iron tower neck, and the iron tower neck is provided with redundant bolts. The structure can reduce the earthwork digging and filling amount of the iron tower foundation, protect the earth surface environment and the ecological environment, reduce the possibility of geological disasters such as water and soil loss and landslide, and reduce the project investment.

Description

TECHNICAL FIELD

[0001] The utility model relates to 500 kilovolt narrow base tower technical field especially through mined -out area and reduce the foundation earthwork amount of excavation and filling of 500 kilovolt narrow base tower. BACKGROUND

[0002] In the industry of electric power, communication, etc., the tower is widely used as an important infrastructure. The construction of the tower usually involves foundation construction, and the excavation and filling operation is a key link. The conventional design scheme and construction technology are often used in the traditional tower foundation construction, and the size and burial depth of the foundation are determined according to the height, load, geological conditions and other factors of the tower, and the control of the amount of excavation and filling is less considered comprehensively and optimized. This leads to a large amount of earthwork excavation and backfilling operation in many projects, especially in complex terrain areas such as mountainous areas and hilly areas.

[0003] At present, when constructing high-voltage transmission lines, the transmission line inevitably passes through a coal mine area. There is a coal mining area in the mine area, and the surface becomes unstable after the coal mining, which will cause uneven settlement to different degrees. When constructing the transmission line in the mined-out area, the tower usually adopts a plate straight column foundation combined with a composite foundation plate to resist the deformation caused by uneven settlement. According to the conventional design idea, the existing 500 kilovolt single-loop transmission line tower has a large root width, which leads to a large foundation area and a large amount of foundation earthwork excavation and filling.

[0004] On the one hand, large-scale excavation and filling operation causes serious damage to the original topography and ecological environment. The excavation process will damage the original vegetation cover, soil structure and topography, which may cause soil erosion, landslides and other geological disasters, and has a long-term and irreversible negative impact on the balance of the surrounding ecological system, which is contrary to the current increasing emphasis on environmental protection.

[0005] On the other hand, the increase of the amount of excavation and filling directly leads to high engineering cost. A large amount of earthwork excavation, transportation, backfilling and disposal of discarded soil requires a large amount of human, material and financial resources.

[0006] Therefore, how to reduce the amount of tower foundation earthwork excavation and filling has become a problem to be solved. INVENTION CONTENTS

[0007] The utility model aims to provide a kind of 500 kilovolt narrow base tower through mined -out area and reduce the foundation earthwork amount of excavation and filling, to solve the problems existing in the prior art.

[0008] To achieve the above object, the utility model provides the following scheme: the utility model provides a 500 kilovolt narrow base tower through mined -out area and reduces basic earthwork amount of excavation and filling, including tower basic body top tower leg, the top of tower leg can detachable installation has tower body, the top of tower body can detachable installation has tower head;

[0009] The bottom end of the tower leg is fixedly installed with a tower foundation, the bottom end of the tower foundation is fixedly installed with a composite foundation plate, the composite foundation plate is fixedly connected with the tower basic body, the overall height of the tower leg, the tower body and the tower head is the overall height of the tower, the bottom end width of the tower leg is the opening width of the tower root, the ratio of the overall height of the tower to the opening width of the tower root is greater than 6:1 and less than 10:1;

[0010] The connection between the tower head and the tower body is the tower neck, and the tower neck is provided with redundant bolts.

[0011] Preferably, the width of the tower neck is much smaller than the width of the tower root opening.

[0012] Preferably, the adjustment range of the redundant bolts is 10mm-15mm.

[0013] Preferably, the height of the overall height of the tower is 18m-54m.

[0014] Preferably, the slope of the tower body is obtained by simulation adjustment by using finite element calculation software.

[0015] Preferably, the opening size of the tower leg and the tower body considers the factor of eccentricity.

[0016] Preferably, all the welds of the tower leg, the tower body and the tower head are provided with seals.

[0017] Preferably, the tower leg, the tower body and the tower head are all B-grade Q235 steel, Q355 steel or Q420 steel.

[0018] Preferably, the tower leg, the tower body and the tower head are all provided with a corrosion-resistant galvanized layer.

[0019] Preferably, the main components in the tower leg, the tower body and the tower head all use M24 high-strength bolts with a strength grade of 8.8, and the remaining components all use bolts with a strength grade of 6.8.

[0020] The utility model discloses following technical effects: the utility model provides a 500kV narrow base tower through goaf and reduce basic earthwork amount of excavation and filling, through the ratio of the full height of iron tower and the opening width of iron tower root is controlled between 6:1 and 10:1, has reduced the opening width of iron tower root, has reduced the base surface excavation amount and the amount of filling produced in composite foundation plate construction, and further protected the surface environment and ecological environment, also reduced the possibility of water and soil loss, mountain landslide and other geological disasters, also reduced the investment of engineering simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0022] Figure 1 It is the side view overall structure schematic diagram of the utility model;

[0023] Figure 2 It is the three-dimensional overall structure schematic diagram of the utility model;

[0024] 1, tower basic body;2, composite foundation plate;3, iron tower foundation;4, tower body;5, iron tower root opening width;6, iron tower full height;7, iron tower neck;8, tower head;9, tower leg. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described in the following by combining with the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0026] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the following will be further detailed to the utility model by combining with the drawings and specific embodiments.

[0027] The utility model provides a 500 kilovolt narrow base tower through goaf and reduce basic earthwork amount of excavation, including tower basic body 1 top tower leg 9, the top end detachably installed with tower body 4 of tower leg 9, the top end detachably installed with tower head 8 of tower body 4, the bottom end fixed mounting of tower leg 9 has iron tower foundation 3, the bottom end fixed mounting of iron tower foundation 3 has composite foundation plate 2, and composite foundation plate 2 is fixedly connected with tower basic body 1, and the overall height of tower leg 9, tower body 4 and tower head 8 is iron tower full height 6, and the bottom end width of tower leg 9 is iron tower root opening width 5, and the ratio of iron tower full height 6 and iron tower root opening width 5 is greater than 6:1 and less than 10:1.

[0028] The utility model discloses a narrow base tower, which is subjected to precise calculation in the design stage, including calculation of parameters such as the weight of the tower itself, wind load and line tension; then, according to the calculated load, the foundation structure is repeatedly optimized and model test is calculated, and simulation is simulated by using advanced finite element calculation and analysis software, the stress condition of the foundation under different structure forms is simulated, the slope of the tower body 4 is continuously adjusted, and then the iron tower root opening width 5 is gradually shortened under the condition of ensuring safety and stability and meeting the requirement of the stress strength of the iron tower; after repeated tests, the ratio of the iron tower full height 6 and the iron tower root opening width 5 can be set to 6:1-10:1 under the condition of ensuring safety and stability and meeting the requirement of the stress strength of the iron tower, and the overall cost will not increase greatly, and then the iron tower root opening width 5 in the utility model is reduced by more than 12% compared with the traditional iron tower, and the tower weight is increased by less than 3%, so that the earthwork amount of excavation generated by the construction of the composite foundation plate 2 can be reduced by about 15%, the amount of filling can be reduced by about 10%, the surface environment and ecological environment are protected, the possibility of geological disasters such as water and soil loss and mountain landslide is reduced, and the investment of manpower, material resources and foundation engineering is also reduced.

[0029] In the embodiment, the tower type of the 500 kilovolt narrow base tower can be a straight-line suspension tower type or a corner strain tower type, so that the design and use requirements of the modern high-voltage transmission line passing through the goaf area of the coal mine can be met to the greatest extent.

[0030] In a further optimization scheme, the connection between the tower head 8 and the tower body 4 is an iron tower neck 7, and the width of the iron tower neck 7 is much smaller than the iron tower root opening width 5; the utility model reduces the iron tower root opening width 5 by adjusting the slope of the tower body 4, but the adjusted iron tower root opening width 5 is also much larger than the width of the iron tower neck 7; after simulation calculation and analysis by the finite element calculation and analysis software, it can be proved that this design scheme will not bring negative effects on the structural stability of the narrow base tower of the utility model, and the safety and stability of the narrow base tower of the utility model are further ensured.

[0031] Further optimization scheme, the neck part 7 of the iron tower is provided with a redundant bolt, the adjustment range of the redundant bolt can be 10mm-15mm; in the use process of the narrow-base tower of the utility model, if the settlement occurs, the redundant bolt can also adjust the stress inside the narrow-base tower, and part of the stress is released, so that the stress inside the narrow-base tower can meet the strength requirement of the rod piece, and the safety and stability are further ensured.

[0032] In the embodiment, when the narrow-base tower of the utility model is designed and simulated, a certain stress allowance is left at the key nodes and components of the tower body 4, when the settlement occurs, the bolts at the nodes can be adjusted to release part of the stress inside the narrow-base tower, and the safety and stability are further ensured.

[0033] Further optimization scheme, the height of the iron tower full height 6 is 18m-54m, so that the narrow-base tower of the utility model can be used under different conditions.

[0034] Further optimization scheme, the opening size of the tower leg 9 and the tower body 4 considers the eccentric factor, so that the installation precision requirement can be reduced, and the small position deviation between the components caused by thermal expansion and cold contraction, external force impact, foundation settlement and other factors in the use process can be better coped with, and the safety and stability are further ensured.

[0035] In the embodiment, the connection part of the tower leg 9 and the iron tower foundation 3 can adopt a special lengthened foundation bolt, after the settlement occurs, the exposed thread length of the adjustable foundation bolt is adjusted, the base top surface is leveled, the deformation stress is released, the deformation of the iron tower is reduced, the tower overturning risk of the goaf operation line is relieved, and the safe operation of the high-voltage transmission line is ensured; wherein, the lengthened foundation bolt is the prior art known in the art, and will not be described here.

[0036] Further optimization scheme, all the welds of the tower leg 9, the tower body 4 and the tower head 8 are provided with a seal; the weld seal can improve the integrity of the overall structure, can better transfer the stress inside the tower, and can also prevent external factors such as moisture, dust or corrosive gas from entering the weld inside to cause corrosion, so that the service life is prolonged while the safety and stability are further ensured.

[0037] Further optimization scheme, the tower leg 9, the tower body 4 and the tower head 8 are all any one of B-grade Q235 steel, Q355 steel or Q420 steel, in the embodiment, the main stress component of the narrow-base tower selects B-grade Q420 high-strength steel, which can provide good yield strength, welding performance and relatively economical structure weight for the narrow-base tower, so as to ensure the safety and stability of the normal operation of the structure.

[0038] Further optimization scheme, tower leg 9, tower body 4 and tower head 8 are all used hot-dip galvanizing anticorrosion treatment, the galvanized layer will generate a very thin, dense zinc oxide protective film in the atmospheric environment, form the anticorrosion layer, it can resist corrosion under the complex external natural environment for a long time, further prolong the service life;And the cost of hot-dip galvanizing is relatively low, once galvanizing treatment can effectively prevent corrosion from occurring in a long time, reduces the maintenance and replacement cost.

[0039] Further optimization scheme, the main components in tower leg 9, tower body 4 and tower head 8 are all used M24 high-strength bolts with strength grade 8.8, the rest of the components are all used bolts with strength grade 6.8;M24 high-strength bolts with strength grade 8.8 can use its higher tensile strength, yield strength and toughness to ensure the safety and stability of the narrow base tower;The bolt with strength grade 6.8 can reduce the cost and universality while ensuring a certain tensile strength, yield strength and toughness, which is convenient for later maintenance and replacement.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0041] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A 500kV narrow base tower passing through mined-out area and reducing the amount of foundation earthwork, comprising a tower basic body (1) and a tower leg (9) above the tower basic body (1), a tower body (4) detachably mounted at the top end of the tower leg (9), and a tower head (8) detachably mounted at the top end of the tower body (4), characterized in that: an iron tower foundation (3) is fixedly mounted at the bottom end of the tower leg (9), a composite foundation plate (2) is fixedly mounted at the bottom end of the iron tower foundation (3), the composite foundation plate (2) is fixedly connected with the tower basic body (1), the overall height of the tower leg (9), the tower body (4) and the tower head (8) is an iron tower overall height (6), the width of the bottom end of the tower leg (9) is an iron tower root opening width (5), the ratio of the iron tower overall height (6) to the iron tower root opening width (5) is greater than 6:1 and less than 10:1; the connection between the tower head (8) and the tower body (4) is an iron tower neck (7), the iron tower neck (7) is provided with redundant bolts. The width of the iron tower neck (7) is much smaller than the iron tower root opening width (5). The adjustment range of the redundant bolts is 10mm-15mm.

2. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, characterized in that, The height of the iron tower overall height (6) is 18m-54m.

3. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, characterized in that, The slope of the tower body (4) is obtained by simulation adjustment using finite element calculation software.

4. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, wherein, The opening size of the tower leg (9) and the tower body (4) considers eccentricity.

5. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, characterized in that, All welds of the tower leg (9), the tower body (4) and the tower head (8) are provided with seals.

6. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, characterized in that, The tower leg (9), the tower body (4) and the tower head (8) are all B-grade Q235 steel, Q355 steel or Q420 steel.

7. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, characterized in that, The tower leg (9), the tower body (4) and the tower head (8) are all provided with a corrosion-resistant galvanized layer.

8. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, wherein, The main components in the tower leg (9), the tower body (4) and the tower head (8) all use M24 high-strength bolts with a strength grade of 8.8, and the remaining components all use bolts with a strength grade of 6.

8.

9. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, wherein, ​ 10. The 500 kV narrow base tower passing through the goaf and reducing the amount of foundation earthwork excavation according to claim 1, wherein, ​

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