CN114045859A - Power transmission pole tower foundation waterproof system for loess foundation and construction method thereof - Google Patents
Power transmission pole tower foundation waterproof system for loess foundation and construction method thereof Download PDFInfo
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- CN114045859A CN114045859A CN202111327900.3A CN202111327900A CN114045859A CN 114045859 A CN114045859 A CN 114045859A CN 202111327900 A CN202111327900 A CN 202111327900A CN 114045859 A CN114045859 A CN 114045859A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
本发明公开了一种用于黄土地基的输电杆塔基础防水系统及其施工方法，涉及输电线路基础施工技术领域，主要目的是解决因黄土地基的湿陷而导致杆塔基础不均匀沉降和承载力降低的工程问题。用于黄土地基的输电杆塔基础防水系统，包括：杆塔基础用于固定杆塔的塔腿，多个杆塔基础分别位于正多边形的顶点；散水边坡自正多边形的边缘向正多边形的外围倾斜，集水边坡自正多边形的边缘向正多边形的中心倾斜，集水坑位于正多边形的中心；隔网覆盖于集水坑的上端口，碎石层铺设于隔网的上方，碎石层上方覆盖有回填土，排气管的下端插入碎石层，排气管的上端位于回填土的上方；正电极和负电极分别设置于集水坑内。
The invention discloses a foundation waterproofing system for a transmission pole and tower for loess foundation and a construction method thereof, and relates to the technical field of transmission line foundation construction. engineering problem. The foundation waterproofing system for transmission towers and towers for loess foundations includes: the tower foundations are used to fix the tower legs of the towers, a plurality of tower foundations are located at the vertices of the regular polygon; The water slope slopes from the edge of the regular polygon to the center of the regular polygon, and the sump is located in the center of the regular polygon; the upper port of the sump is covered by the partition net, the gravel layer is laid on the top of the partition mesh, and the top of the gravel layer is covered There is backfill, the lower end of the exhaust pipe is inserted into the gravel layer, and the upper end of the exhaust pipe is located above the backfill; the positive electrode and the negative electrode are respectively arranged in the sump.
Description
Technical Field
The invention relates to the technical field of foundation construction of power transmission lines, in particular to a power transmission pole tower foundation waterproof system for a loess foundation and a construction method thereof.
Background
In the loess area of the large number of extra-high voltage transmission lines, loess is special soil which has vertical joints and large pores and is easy to be collapsed when meeting water, the loess has special physical and mechanical properties, and has high strength and small compressibility when not being soaked by water, and when being soaked by water under certain pressure (or dead weight pressure), the loess structure can be rapidly destroyed to generate large additional sinking phenomenon, and the strength is rapidly reduced.
After the construction of the power transmission line tower foundation is completed, if the foundation soil body in the open range meets water, the water body is easy to seep, the tower foundation is caused to sink and sink, and the safe operation of the power transmission line tower is influenced. Therefore, necessary waterproof measures need to be taken within the range of the power transmission line tower base root of the collapsible loess foundation so as to ensure the stability and safety of the tower foundation.
Disclosure of Invention
In view of the above, the invention provides a power transmission tower foundation waterproof system for a loess foundation and a construction method thereof, and mainly aims to solve the engineering problems of uneven settlement of a tower foundation and reduction of bearing capacity caused by the settlement of the loess foundation.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
in one aspect, the present invention provides a power transmission tower foundation waterproofing system for a loess foundation, the system comprising: the device comprises a plurality of pole tower foundations, a water treatment part, an exhaust part and an electrolysis mechanism;
the tower foundations are used for fixing tower legs of a tower, and the plurality of tower foundations are respectively positioned at the vertexes of the regular polygon;
the water treatment part comprises a water dispersion side slope and a water collecting mechanism, the water dispersion side slope inclines from the edge of the regular polygon to the periphery of the regular polygon, the water collecting mechanism comprises a water collecting side slope and a water collecting pit, the water collecting side slope inclines from the edge of the regular polygon to the center of the regular polygon, the water collecting pit is positioned at the center of the regular polygon, and waterproof material layers are respectively attached to the inner surface of the water collecting pit, the water dispersion side slope and the water collecting side slope;
the exhaust part comprises a separation net, a gravel layer and an exhaust pipe, the separation net covers an upper port of the water collecting pit, the gravel layer is laid above the separation net, backfill soil covers the gravel layer, the lower end of the exhaust pipe is inserted into the gravel layer, and the upper end of the exhaust pipe is located above the backfill soil;
the electrolytic mechanism comprises a positive electrode and a negative electrode, the positive electrode and the negative electrode are respectively arranged in the water collecting pit, and the distance between the positive electrode and the bottom wall of the water collecting pit is equal to the distance between the negative electrode and the bottom wall of the water collecting pit.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, the lower end of the exhaust pipe contacts with the separation net.
Optionally, the water collecting pit further comprises a plurality of reinforced concrete plates, and the plurality of reinforced concrete plates are fixedly mounted on the bottom wall and the peripheral side wall of the water collecting pit respectively.
Optionally, the separation net is a dense mesh steel bar net.
Optionally, the exhaust pipe further comprises a rain-proof cap, wherein the rain-proof cap is fixedly arranged at the upper end of the exhaust pipe and used for preventing rainwater from being drenched into the exhaust pipe.
Optionally, the number of the tower foundations is four.
Optionally, the waterproof material layer is made of an SBS material.
In another aspect, the present invention provides a method for constructing a power transmission tower foundation waterproof system for a loess foundation, including the steps of:
(1) digging a water collecting pit at a tower position center pile (the geometric center of a regular polygon surrounded by connecting lines of a plurality of tower foundations), and fixedly installing reinforced concrete slabs on the bottom wall and the peripheral side wall of the water collecting pit respectively;
(2) making a water collecting side slope in the range of the regular polygon, and making a water dispersing side slope outside the range of the regular polygon;
(3) paving waterproof material layers on the inner surface of the water collecting pit, the water collecting side slope and the water dispersing side slope;
(4) installing a positive electrode and a negative electrode of an electrolysis mechanism in the water collecting pit, and covering a separation net on an upper port of the water collecting pit;
(5) erecting an exhaust pipe on the separation net, laying a gravel layer on the separation net, covering backfill soil on the gravel layer, and mounting a rain-proof cap at the upper end of the exhaust pipe.
By the technical scheme, the invention at least has the following advantages:
each tower leg of shaft tower is fixed mounting respectively on different shaft tower bases, and a plurality of shaft tower bases are located regular polygon's summit respectively, guarantee the overall stability of shaft tower.
On the basis, in a rainy day, the loess is gradually soaked by rainwater and permeates to the surface of the waterproof material of the water collecting side slope and the surface of the waterproof material of the water dispersing side slope, and the rainwater outside the regular polygon flows along the inclined surface of the water dispersing side slope so as to be dispersed outside the range of the root opening of the tower foundation; rainwater in the regular polygon flows towards the water collecting pit along the inclined surface of the water collecting side slope, so that the rainwater is collected in the water collecting pit.
When the liquid level of the rainwater in the water collecting pit is below the positive electrode and the negative electrode, the rainwater naturally evaporates and rises along the gravel layer and the exhaust pipe in sequence; when the liquid level of rainwater in the water collecting pit rises and the rainwater contacts the positive electrode and the negative electrode, water in the water collecting pit is electrolyzed to generate hydrogen and oxygen, and the part of gas is discharged to the atmosphere along the exhaust pipe, so that the effect of consuming the rainwater in the water collecting pit is achieved.
The waterproof material layer prevents rainwater from continuously permeating downwards, the physical and mechanical characteristics of the tower foundation bearing layer are not affected, and loess collapse is avoided; simultaneously, the sump pit is collected and is consumed the rainwater, and waterproof material layer top loess just can not be soaked by the rainwater for a long time, and the loess structure just can not destroyed, and intensity also can not reduce rapidly.
Therefore, through the arrangement, the engineering problems of uneven settlement of the tower foundation and reduction of the bearing capacity caused by the settlement of the loess foundation are solved.
Meanwhile, the collected rainwater is decomposed through electrolytic reaction, and the generated gas is harmless and can be directly discharged into the air.
Drawings
Fig. 1 is a side sectional view of a power transmission tower foundation waterproof system for a loess foundation according to an embodiment of the present invention;
fig. 2 is a top view of a power transmission tower foundation waterproof system for a loess foundation according to an embodiment of the present invention;
fig. 3 is an enlarged view of a portion a in fig. 1.
Reference numerals in the drawings of the specification include: the tower foundation 1, the water-dispersing side slope 2, the water-collecting side slope 3, the water-collecting pit 4, the separation net 5, the gravel layer 6, the exhaust pipe 7, the backfill soil 8, the positive electrode 9, the negative electrode 10 and the rain-proof cap 11.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined object, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, 2 and 3, in one aspect, an embodiment of the present invention provides a power transmission tower foundation waterproofing system for a loess foundation, including: a plurality of pole tower foundations 1, a water treatment part, an exhaust part and an electrolysis mechanism;
the tower foundations 1 are used for fixing tower legs of a tower, and the tower foundations 1 are respectively positioned at the vertexes of a regular polygon;
the water treatment part comprises a water dispersing side slope 2 and a water collecting mechanism, the water dispersing side slope 2 inclines from the edge of the regular polygon to the periphery of the regular polygon, the water collecting mechanism comprises a water collecting side slope 3 and a water collecting pit 4, the water collecting side slope 3 inclines from the edge of the regular polygon to the center of the regular polygon, the water collecting pit 4 is positioned at the center of the regular polygon, and waterproof material layers are respectively attached to the inner surface of the water collecting pit 4, the water dispersing side slope 2 and the water collecting side slope 3;
the exhaust part comprises a separation net 5, a gravel layer 6 and an exhaust pipe 7, the separation net 5 covers an upper port of the water collecting pit 4, the gravel layer 6 is laid above the separation net 5, backfill soil 8 covers the gravel layer 6, the lower end of the exhaust pipe 7 is inserted into the gravel layer 6, and the upper end of the exhaust pipe 7 is located above the backfill soil 8;
the electrolysis mechanism comprises a positive electrode 9 and a negative electrode 10, the positive electrode 9 and the negative electrode 10 are respectively arranged in the water collecting pit 4, and the distance between the bottom wall of the positive electrode 9 and the bottom wall of the water collecting pit 4 is equal to the distance between the bottom wall of the negative electrode 10 and the bottom wall of the water collecting pit 4.
The working process of the power transmission pole tower foundation waterproof system for the loess foundation is as follows:
each tower leg of shaft tower is fixed mounting respectively on different shaft tower basis 1, and a plurality of shaft tower basis 1 are located regular polygon's summit respectively, guarantee the overall stability of shaft tower.
On the basis, in a rainy day, the rainwater gradually soaks loess and permeates to the surface of the waterproof material of the water collecting side slope 3 and the surface of the waterproof material of the water dispersing side slope 2, and the rainwater outside the regular polygon flows along the inclined surface of the water dispersing side slope 2 and is dispersed outside the range of 1 opening of the tower foundation; the rainwater in the regular polygon flows toward the sump 4 along the inclined surface of the water collecting slope 3, so that the rainwater is collected in the sump 4.
When the rainwater liquid level in the water collecting pit 4 is below the positive electrode 9 and the negative electrode 10, the rainwater naturally evaporates and rises along the separation net 5, the gravel layer 6 and the exhaust pipe 7 in sequence; when the liquid level of rainwater in the water collecting pit 4 rises and the rainwater contacts the positive electrode 9 and the negative electrode 10, water in the water collecting pit 4 is electrolyzed to generate hydrogen and oxygen, and the part of gas is discharged to the atmosphere along the separation net 5 and the exhaust pipe 7, so that the effect of consuming the rainwater in the water collecting pit 4 is achieved.
The waterproof material layer prevents rainwater from continuously permeating downwards, the physical and mechanical characteristics of the bearing layer of the tower foundation 1 are not affected, and loess collapse is avoided; simultaneously, the sump 4 is collected and is consumed the rainwater, and waterproof material layer top loess just can not be soaked by the rainwater for a long time, and the loess structure just can not destroyed, and intensity also can not reduce rapidly.
In the technical scheme of the invention, through the arrangement, the engineering problems of uneven settlement of the tower foundation 1 and reduction of the bearing capacity caused by the settlement of the loess foundation are solved.
Meanwhile, the collected rainwater is decomposed through electrolytic reaction, and the generated gas is harmless and can be directly discharged into the air.
Specifically, the backfill 8 covers the gravel layer 6, the catchment side slope 3 and the bulk water side slope 2 at the same time, and the backfill 8 is tamped.
Specifically, waterproof material layer part adheres to the side of shaft tower basis 1, avoids the rainwater to permeate downwards along the side of shaft tower basis 1.
Specifically, the clearance of adjacent rubble piece in the rubble layer 6 is big for the clearance of the adjacent granule of the soil body, can guarantee on the one hand that the gas in the sump pit 4 can discharge smoothly, and on the other hand can filter earth as the anti-filter bed, avoids dropping back fill 8 soil bodies in the sump pit 4.
Specifically, the exhaust pipe 7 is made of glass fiber reinforced plastic resin, and is light in weight and high in strength.
Specifically, the electrolysis mechanism is electrically connected to a power transmission line erected on a tower to provide current for the electrolysis mechanism.
As shown in fig. 1 and 3, in the embodiment, the lower end of the exhaust pipe 7 is in contact with the screen 5.
In the present embodiment, specifically, the gas in the sump 4 can rise along the exhaust pipe 7 when reaching the partition net 5, thereby preventing the lower end of the exhaust pipe 7 from being clogged with the crushed stones.
In the specific embodiment, the water collecting device further comprises a plurality of reinforced concrete plates, and the plurality of reinforced concrete plates are fixedly mounted on the bottom wall and the peripheral side wall of the water collecting pit 4 respectively.
In the embodiment, specifically, the reinforced concrete slab is fixedly attached to the bottom wall and the peripheral side wall of the sump 4, so as to increase the structural strength of the sump 4, prevent the soil around the sump 4 from collapsing into the sump 4, and ensure that the volume in the sump 4 is not reduced; on the basis, the waterproof material layer is attached to the outer surface of the reinforced concrete slab.
In a specific embodiment, the partition net 5 is a dense mesh steel mesh.
In this embodiment, specifically, the plurality of reinforcing bars are criss-cross woven into a net shape, and have high mechanical strength, and can bear the weight of the gravel layer 6 and the backfill soil 8.
As shown in fig. 1 and 2, in a specific embodiment, the exhaust pipe further includes a rain-proof cap 11, and the rain-proof cap 11 is fixedly disposed at an upper end of the exhaust pipe 7, so as to prevent rainwater from entering the exhaust pipe 7.
In this embodiment, specifically, in rainy weather, due to the blocking of the rain hat 11, the rainwater cannot directly flow into the upper pipe orifice of the exhaust pipe 7, but the gas generated in the water collection pit 4 can be discharged along the exhaust pipe 7.
In a specific embodiment, the number of the tower foundations 1 is four.
In this embodiment, specifically, the four tower foundations 1 are respectively located at the vertexes of the regular quadrangle, and when the tower legs of the tower are fixedly installed on the tower foundations 1, the tower is uniformly supported by the four supporting points, so that the overall stability of the tower is ensured.
In a specific embodiment, the waterproof material layer is made of SBS material.
In the present embodiment, the SBS waterproof material is a coiled sheet waterproof material which is made by using asphalt as a dipping and coating material, wherein a styrene-butadiene-styrene (SBS) waterproof coiled material thermoplastic elastomer is used as a modifier, and the upper surface of the asphalt is coated with a polyethylene film, fine sand, a mineral sheet (particle) material, or an aluminum foil, a copper foil, or other isolation materials. The advantages are that: (1) the thermoplastic plastic processing equipment can be used for processing and forming, such as extrusion, injection, blow molding and the like, and the forming speed is higher than that of the traditional vulcanized rubber process; (2) the vulcanization is not needed, and the vulcanization procedure in the common thermosetting rubber processing process can be saved, so that the equipment investment is low, the production energy consumption is low, the process is simple, the processing period is short, the production efficiency is high, and the processing cost is low; (3) the leftover materials can be recycled for a plurality of times, so that the resource is saved, and the environment protection is facilitated.
In another aspect, another embodiment of the present invention provides a method for constructing a power transmission tower foundation waterproof system for a loess foundation, including the steps of:
(1) digging a water collecting pit 4 at a tower position center pile (the geometric center of a regular polygon surrounded by connecting lines of a plurality of tower foundations 1), and fixedly installing reinforced concrete slabs on the bottom wall and the peripheral side wall of the water collecting pit 4 respectively;
(2) manufacturing a water collecting side slope 3 in the range of the regular polygon, and manufacturing a water dispersing side slope 2 outside the range of the regular polygon;
(3) paving waterproof material layers on the inner surface of the water collecting pit 4, the water collecting side slope 3 and the water dispersing side slope 2;
(4) installing a positive electrode 9 and a negative electrode 10 of an electrolysis mechanism in the sump 4, and covering the upper port of the sump 4 with a separation net 5;
(5) erecting an exhaust pipe 7 on the separation net 5, laying a gravel layer 6 on the separation net 5, covering backfill soil 8 on the gravel layer 6, and fixedly mounting a rain-proof cap 11 at the upper end of the exhaust pipe 7.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A power transmission tower foundation waterproof system for a loess foundation, comprising:
the tower foundations are used for fixing tower legs of a tower, and the tower foundations are respectively positioned at the vertexes of a regular polygon;
the water treatment part comprises a water dispersion side slope and a water collecting mechanism, the water dispersion side slope inclines from the edge of the regular polygon to the periphery of the regular polygon, the water collecting mechanism comprises a water collecting side slope and a water collecting pit, the water collecting side slope inclines from the edge of the regular polygon to the center of the regular polygon, the water collecting pit is positioned at the center of the regular polygon, and waterproof material layers are attached to the inner surface of the water collecting pit, the water dispersion side slope and the water collecting side slope respectively;
the exhaust part comprises a separation net, a gravel layer and an exhaust pipe, the separation net covers an upper port of the water collecting pit, the gravel layer is laid above the separation net, backfill soil covers the gravel layer, the lower end of the exhaust pipe is inserted into the gravel layer, and the upper end of the exhaust pipe is located above the backfill soil;
the electrolytic mechanism comprises a positive electrode and a negative electrode, the positive electrode and the negative electrode are respectively arranged in the water collecting pit, and the distance between the positive electrode and the bottom wall of the water collecting pit is equal to the distance between the negative electrode and the bottom wall of the water collecting pit.
2. The power transmission tower base waterproof system for the loess foundation according to claim 1,
the lower end of the exhaust pipe is in contact with the separation net.
3. The power transmission tower base waterproof system for the loess foundation according to claim 1,
the water collecting pit further comprises a plurality of reinforced concrete plates, and the reinforced concrete plates are fixedly mounted on the bottom wall and the peripheral side wall of the water collecting pit respectively.
4. The power transmission tower base waterproof system for the loess foundation according to claim 1,
the separation net is a dense mesh steel bar net.
5. The power transmission tower base waterproof system for the loess foundation according to any one of claims 1 to 4,
still include rain-proof cap, rain-proof cap fixed set up in the upper end of blast pipe is used for avoiding the rainwater to drench the blast pipe.
6. The power transmission tower base waterproof system for the loess foundation according to any one of claims 1 to 4,
the number of the tower foundations is four.
7. The power transmission tower base waterproof system for the loess foundation according to any one of claims 1 to 4,
the waterproof material layer is made of SBS.
8. The construction method of the power transmission tower foundation waterproof system for the loess foundation is characterized by comprising the following steps of:
(1) digging a water collecting pit at a tower position center pile (the geometric center of a regular polygon surrounded by connecting lines of a plurality of tower foundations), and fixedly installing reinforced concrete slabs on the bottom wall and the peripheral side wall of the water collecting pit respectively;
(2) making a water collecting side slope in the range of the regular polygon, and making a water dispersing side slope outside the range of the regular polygon;
(3) paving waterproof material layers on the inner surface of the water collecting pit, the water collecting side slope and the water dispersing side slope;
(4) installing a positive electrode and a negative electrode of an electrolysis mechanism in the water collecting pit, and covering a separation net on an upper port of the water collecting pit;
(5) erecting an exhaust pipe on the separation net, laying a gravel layer on the separation net, covering backfill soil on the gravel layer, and mounting a rain-proof cap at the upper end of the exhaust pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111327900.3A CN114045859B (en) | 2021-11-10 | 2021-11-10 | Transmission tower foundation waterproof system for loess foundation and construction method thereof |
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| CN202111327900.3A CN114045859B (en) | 2021-11-10 | 2021-11-10 | Transmission tower foundation waterproof system for loess foundation and construction method thereof |
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| CN114045859B CN114045859B (en) | 2023-08-11 |
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| CN113174993A (en) * | 2021-06-03 | 2021-07-27 | 中国电建集团青海省电力设计院有限公司 | Waterproof drainage structure for base plane of power transmission line iron tower and construction method of waterproof drainage structure |
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| CN102926398A (en) * | 2012-10-10 | 2013-02-13 | 青海省电力设计院 | Construction method of inclined column type corrosion resistant foundation for power line in salt lake area |
| CN203924109U (en) * | 2014-05-26 | 2014-11-05 | 江苏开来预应力工程有限公司 | Post stretching bonded prestress underground garage splash guard stub structure |
| CN209482442U (en) * | 2018-12-25 | 2019-10-11 | 北京四汇建筑工程有限责任公司 | Underground sumping, exhaust system |
| CN111119226A (en) * | 2020-02-17 | 2020-05-08 | 中国电建集团西北勘测设计研究院有限公司 | Wind power tower pile foundation for self-weight collapsible loess field and construction method |
| CN113174993A (en) * | 2021-06-03 | 2021-07-27 | 中国电建集团青海省电力设计院有限公司 | Waterproof drainage structure for base plane of power transmission line iron tower and construction method of waterproof drainage structure |
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