CN114045859B - Transmission tower foundation waterproof system for loess foundation and construction method thereof - Google Patents

Abstract

The invention discloses a foundation waterproof system for transmission poles and towers for loess foundations and a construction method thereof, relates to the technical field of transmission line foundation construction, and mainly aims to solve uneven settlement and lower bearing capacity of poles and towers foundations caused by collapsing of loess foundations engineering problems. The waterproof system for transmission tower foundations for loess foundations includes: the tower foundation is used to fix the tower legs of the tower, and multiple tower foundations are respectively located at the vertices of the regular polygon; the water slope slopes from the edge of the regular polygon to the periphery of the regular polygon, and the set The water slope slopes from the edge of the regular polygon to the center of the regular polygon, and the sump is located at the center of the regular polygon; There is backfill soil, 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 positive electrode and the negative electrode are respectively arranged in the sump.

Description

Waterproof system and construction method for transmission tower foundation used in loess foundation

technical field

The invention relates to the technical field of transmission line foundation construction, in particular to a foundation waterproof system for transmission poles and towers used on loess foundations and a construction method thereof.

Background technique

Loess is a special soil with vertical joints and large pores, which is prone to collapsibility when exposed to water. Its physical and mechanical properties are special. When it is not soaked by water, its general strength Higher and less compressible, when soaked by water under a certain pressure (or self-weight pressure), the soil structure will be destroyed rapidly, resulting in a large additional subsidence phenomenon, and the strength will decrease rapidly.

After the construction of the transmission line tower foundation is completed, if the foundation soil within the root opening range encounters water, it is easy to cause water seepage, which will lead to the subsidence of the tower foundation and affect the safe operation of the transmission line tower. Therefore, it is necessary to take necessary waterproof measures to ensure the stability and safety of the tower foundation within the scope of the foundation of the transmission line tower on the collapsible loess foundation.

Contents of the invention

In view of this, the present invention provides a transmission tower foundation waterproof system for loess foundation and its construction method. The main purpose is to solve the engineering problems of uneven settlement and bearing capacity reduction of the tower foundation caused by the collapsibility of the loess foundation.

In order to achieve the above object, the present invention mainly provides the following technical solutions:

On the one hand, the present invention provides a foundation waterproofing system for power transmission poles and towers for loess foundations. The system includes: a plurality of poles and towers foundations, a water treatment unit, an exhaust unit, and an electrolysis mechanism;

The tower foundation is used to fix the tower legs of the tower, and a plurality of the tower foundations are respectively located at vertices of regular polygons;

The water treatment part includes a water-distributing slope and a water collection mechanism, the water-distributing slope is inclined from the edge of the regular polygon to the periphery of the regular polygon, and the water collection mechanism includes a water-collecting slope and a sump, The water collection slope is inclined from the edge of the regular polygon to the center of the regular polygon, the sump is located at the center of the regular polygon, the inner surface of the sump, the water distribution slope and The water-collecting slopes are respectively attached with waterproof material layers;

The exhaust part includes a screen, a gravel layer and an exhaust pipe, the screen covers the upper port of the sump, the gravel layer is laid on the screen, and the gravel The layer is covered with backfill soil, 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 electrolysis mechanism includes a positive electrode and a negative electrode, the positive electrode and the negative electrode are respectively arranged in the sump, and the distance between the positive electrode and the bottom wall of the sump is equal to the distance between the negative electrode and the sump. Describe the distance from the bottom wall of the sump.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

Optionally, the lower end of the exhaust pipe is in contact with the partition net.

Optionally, it also includes a plurality of reinforced concrete slabs, and the plurality of reinforced concrete slabs are respectively fixedly installed on the bottom wall and the surrounding side walls of the sump.

Optionally, the spacer is a dense mesh reinforced mesh.

Optionally, a rainproof cap is also included, and the rainproof cap is fixedly arranged on the upper end of the exhaust pipe for preventing rainwater from pouring into the exhaust pipe.

Optionally, the number of the tower foundations is four.

Optionally, the waterproof material layer is made of SBS.

On the other hand, the present invention provides a construction method for the foundation waterproofing system of transmission towers on loess foundations, comprising the following steps:

(1) Dig a sump at the center pile of the tower (the geometric center of the regular polygon surrounded by the connection lines of multiple tower foundations), and install reinforced concrete on the bottom wall and surrounding side walls of the sump respectively. plate;

(2) make water-collecting slope within the scope of described regular polygon, make loose water slope outside the scope of described regular polygon;

(3) laying a waterproof material layer on the inner surface of the sump, the water collection slope and the scattered water slope;

(4) Install the positive electrode and the negative electrode of the electrolysis mechanism in the described sump, and cover the upper port of the described sump with a screen;

(5) Set up an exhaust pipe on the spacer, then lay a gravel layer on the spacer, cover the backfill soil on the gravel layer, and install a rainproof cap on the upper end of the exhaust pipe.

By virtue of the above technical solutions, the present invention has at least the following advantages:

Each tower leg of the tower is fixedly installed on different tower foundations, and multiple tower foundations are respectively located at the vertices of the regular polygon to ensure the overall stability of the tower.

On this basis, when it rains, the rainwater gradually soaks the loess and penetrates to the waterproof material surface of the catchment slope and the waterproof material surface of the diffuse slope, and the rainwater outside the regular polygon flows along the inclined surface of the diffuse slope. Thereby dispersing to the outside of the root opening range of the tower foundation; the rainwater in the regular polygon flows along the slope of the catchment slope towards the sump, so that the rainwater is collected in the sump.

When the rainwater level in the sump is below the positive electrode and the negative electrode, the rainwater evaporates naturally and rises sequentially along the gravel layer and the exhaust pipe; when the rainwater level in the sump rises, the rainwater contacts the positive electrode and the negative electrode. When the electrode is used, the water in the sump is electrolyzed to generate hydrogen and oxygen, and this part of the gas is discharged into the atmosphere along the exhaust pipe to consume the rainwater in the sump.

The waterproof material layer prevents rainwater from continuously penetrating downward, and the physical and mechanical characteristics of the bearing layer of the tower foundation will not be affected, avoiding loess collapsibility; at the same time, the sump collects and consumes rainwater, so the loess above the waterproof material layer will not be long-term rainwater If soaked in water, the loess structure will not be destroyed, and the strength will not decrease rapidly.

Therefore, through the above setting, the engineering problems of uneven settlement and bearing capacity reduction of the tower foundation due to the collapsing of the loess foundation are solved.

At the same time, the collected rainwater is decomposed through electrolysis, and the gas produced is harmless and can be directly discharged into the air.

Description of drawings

Fig. 1 is a side view sectional view of a waterproof system for transmission tower foundations for loess foundations provided by an embodiment of the present invention;

Fig. 2 is a top view of a transmission tower foundation waterproof system for loess foundation provided by an embodiment of the present invention;

Fig. 3 is an enlarged view of part A in Fig. 1 .

The reference signs in the accompanying drawings of the description include: pole tower foundation 1, loose water slope 2, water collection slope 3, sump pit 4, partition net 5, gravel layer 6, exhaust pipe 7, backfill soil 8, positive electrode 9. Negative electrode 10, rainproof cap 11.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the application according to the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. . In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, on the one hand, an embodiment of the present invention provides a waterproof system for transmission tower foundations for loess foundations, which includes: a plurality of tower foundations 1, water treatment parts, drainage Gas department and electrolysis mechanism;

The tower foundation 1 is used to fix the tower legs of the tower, and a plurality of the tower foundations 1 are respectively located at the vertices of the regular polygon;

The water treatment section includes a water-distributing slope 2 and a water collection mechanism. The water-distributing slope 2 is inclined from the edge of the regular polygon to the periphery of the regular polygon. The water-collecting mechanism includes a water-collecting slope 3 and a water collection mechanism. Water pit 4, described catchment slope 3 is inclined to the center of described regular polygon from the edge of described regular polygon, and described sump pit 4 is positioned at the center of described regular polygon, and the inner surface of described sump pit 4 , The water-dispersing slope 2 and the water-collecting slope 3 are respectively attached with waterproof material layers;

The exhaust part includes a screen 5, a gravel layer 6 and an exhaust pipe 7, the screen 5 covers the upper port of the sump 4, and the gravel layer 6 is laid on the screen 5 Above the gravel layer 6 is covered with backfill soil 8, 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;

Described electrolysis mechanism comprises positive electrode 9 and negative electrode 10, and described positive electrode 9 and described negative electrode 10 are arranged in described sump 4 respectively, and the bottom wall of described positive electrode 9 and described sump 4 The distance is equal to the distance between the negative electrode 10 and the bottom wall of the sump 4 .

The working process of the transmission tower foundation waterproof system for the loess foundation is as follows:

Each tower leg of the tower is fixedly installed on different tower foundations 1 respectively, and multiple tower foundations 1 are respectively located at vertices of regular polygons to ensure the overall stability of the tower.

On this basis, when it rains, the rainwater gradually soaks the loess and penetrates to the surface of the waterproof material of the catchment slope 3 and the surface of the waterproof material of the diffuser slope 2, and the rainwater outside the regular polygon follows the slope of the diffuser slope 2 The rainwater in the regular polygon flows along the slope of the catchment slope 3 towards the sump 4, so that the rainwater is collected in the sump 4.

When the rainwater liquid level in the sump 4 is below the positive electrode 9 and the negative electrode 10, the rainwater evaporates naturally and rises successively along the separator 5, the gravel layer 6 and the exhaust pipe 7; When the rainwater level rises, when the rainwater touches the positive electrode 9 and the negative electrode 10, the water in the sump 4 is electrolyzed to generate hydrogen and oxygen, and this part of the gas is discharged into the atmosphere along the screen 5 and the exhaust pipe 7 to reach consumption. Effect of rainwater in sump 4.

The waterproof material layer prevents rainwater from continuously penetrating downward, and the physical and mechanical characteristics of the bearing layer of the tower foundation 1 will not be affected, avoiding loess collapsibility; at the same time, the sump 4 collects and consumes rainwater, and the loess above the waterproof material layer will not last for a long time. Soaked by rain, the loess structure will not be damaged and its strength will not decrease rapidly.

In the technical solution of the present invention, through the above arrangement, the engineering problems of uneven settlement and bearing capacity reduction of the tower foundation 1 caused by the collapsing of the loess foundation are solved.

At the same time, the collected rainwater is decomposed through electrolysis, and the gas produced is harmless and can be directly discharged into the air.

Specifically, the backfill soil 8 covers the gravel layer 6 , the water collection slope 3 and the water distribution slope 2 at the same time, and the backfill soil 8 is compacted.

Specifically, the waterproof material layer is partially adhered to the side of the tower foundation 1 to prevent rainwater from penetrating downward along the side of the tower foundation 1 .

Specifically, the gap between adjacent crushed stones in the crushed stone layer 6 is larger than the gap between adjacent particles of the soil, which can ensure that the gas in the sump 4 can be discharged smoothly on the one hand, and can be used as an anti-filter layer on the other hand. Filter the soil to avoid falling backfill soil 8 soil bodies in the sump 4 .

Specifically, the exhaust pipe 7 is made of glass fiber reinforced plastic resin, which is light in weight and high in strength.

Specifically, the electrolysis mechanism is electrically connected to the power transmission line erected on the tower to provide current for the electrolysis mechanism.

As shown in FIG. 1 and FIG. 3 , in a specific embodiment, the lower end of the exhaust pipe 7 is in contact with the partition net 5 .

In this embodiment, specifically, the gas in the sump 4 can rise along the exhaust pipe 7 when it reaches the partition screen 5, so as to prevent the lower end of the exhaust pipe 7 from being blocked by gravel.

In a specific embodiment, it also includes a plurality of reinforced concrete slabs, and the plurality of reinforced concrete slabs are respectively fixedly installed on the bottom wall and the peripheral side wall of the sump 4 .

In this embodiment, specifically, the reinforced concrete slab is fixedly attached to the bottom wall and surrounding side walls of the sump 4 to increase the structural strength of the sump 4 and prevent the soil around the sump 4 from moving toward the sump. The water pit 4 collapses, thereby ensuring that the volume in the sump 4 will not shrink; on this basis, the waterproof material layer is attached to the outer surface of the reinforced concrete slab.

In a specific embodiment, the spacer 5 is a dense mesh reinforced mesh sheet.

In this embodiment, specifically, a plurality of steel bars are criss-crossed and woven into a network shape, which has high mechanical strength and can bear the weight of the crushed stone layer 6 and the backfill soil 8 .

As shown in Figures 1 and 2, in a specific embodiment, a rainproof cap 11 is also included, and the rainproof cap 11 is fixedly arranged on the upper end of the exhaust pipe 7 for preventing rainwater from pouring into the exhaust gas. Tube 7.

In this embodiment, specifically, when it is raining, due to the blocking of the rainproof cap 11, the rainwater will not directly pour into the upper nozzle of the exhaust pipe 7, but the gas generated in the sump 4 can flow along the exhaust pipe. Tube 7 exits.

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 vertices of the regular quadrilateral. When the tower legs of the tower are fixedly installed on the tower foundation 1, the tower is evenly supported by the four support points to ensure the overall stability of the tower.

In a specific embodiment, the waterproof material layer is made of SBS.

In this embodiment, specifically, the SBS waterproof material is impregnated and coated with asphalt made of styrene-butadiene-styrene (SBS) waterproof membrane thermoplastic elastomer as a modifier, and the upper surface is covered with polystyrene. Rollable sheet-shaped waterproof membrane made of vinyl film, fine sand, mineral flakes (granules) or aluminum foil, copper foil and other insulating materials. Advantages: (1) Thermoplastic processing equipment can be used for processing and molding, such as extrusion, injection, blow molding, etc., and the molding speed is faster than the traditional vulcanized rubber process; (2) No vulcanization is required, which can save the vulcanization in the process of general thermosetting rubber processing process, so the equipment investment is low, the production energy consumption is low, the process is simple, the processing cycle is short, the production efficiency is high, and the processing cost is low; (3) the corner-adding surplus material can be recycled many times, saving resources, and is conducive to environmental protection.

On the other hand, another embodiment of the present invention provides a construction method for a foundation waterproof system for transmission poles and towers on a loess foundation, comprising the following steps:

(1) Excavate the sump 4 at the center pile of the tower position (the geometric center of the regular polygon surrounded by the connection of a plurality of pole tower foundations 1), and fix the bottom wall and the peripheral side wall of the sump 4 respectively installation of reinforced concrete slabs;

(2) make water-collecting slope 3 within the scope of described regular polygon, make water-dissipating slope 2 outside the scope of described regular polygon;

(3) laying a waterproof material layer on the inner surface of the sump 4, the water-collecting slope 3 and the water-distributing slope 2;

(4) Install the positive electrode 9 and the negative electrode 10 of the electrolysis mechanism in the described sump 4, and cover the upper port of the described sump 4 with the screen 5;

(5) Set up exhaust pipe 7 on described spacer 5, then lay crushed stone layer 6 on described spacer 5, then cover backfill soil 8 on described gravel layer 6, and in described exhaust The upper end of pipe 7 is fixedly installed rainproof cap 11.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (8)

1. A transmission tower foundation waterproof system for loess foundation, comprising:

the tower foundations are used for fixing tower legs of the tower, and the tower foundations are respectively positioned at the top points of the regular polygons;

the water treatment part comprises a water scattering side slope and a water collecting mechanism, the water scattering 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 a waterproof material layer is respectively attached to the inner surface of the water collecting pit, the water scattering 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 the upper port of the water collecting pit, the gravel layer is laid above the separation net, backfill soil covers the upper part of 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 positioned above the backfill soil;

the electrolysis mechanism comprises a positive electrode and a negative electrode, wherein 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 transmission tower foundation waterproof system for loess foundation according to claim 1, wherein,

the lower end of the exhaust pipe is contacted with the separation net.

3. The transmission tower foundation waterproof system for loess foundation according to claim 1, wherein,

the water collecting pit further comprises a plurality of reinforced concrete plates, and the reinforced concrete plates are respectively and fixedly installed on the bottom wall and the peripheral side wall of the water collecting pit.

4. The transmission tower foundation waterproof system for loess foundation according to claim 1, wherein,

the separation net is a dense mesh steel bar net sheet.

5. The transmission tower foundation waterproof system for the loess foundation according to any one of claims 1 to 4, wherein,

the rain-proof cap is fixedly arranged at the upper end of the exhaust pipe and used for preventing rainwater from being sprayed into the exhaust pipe.

6. The transmission tower foundation waterproof system for the loess foundation according to any one of claims 1 to 4, wherein,

the number of the tower foundations is four.

7. The transmission tower foundation waterproof system for the loess foundation according to any one of claims 1 to 4, wherein,

the waterproof material layer is made of SBS material.

8. A construction method of a transmission tower foundation waterproof system for loess foundation as set forth in claim 1, comprising the steps of:

(1) Digging a water pit at a central pile (a geometric center of a regular polygon surrounded by connecting lines of a plurality of tower foundations) of a tower position, and respectively and fixedly mounting reinforced concrete plates on the bottom wall and the peripheral side wall of the water pit;

(2) Manufacturing a water collecting side slope in the range of the regular polygon, and manufacturing 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 scattering side slope;

(4) A positive electrode and a negative electrode of an electrolysis mechanism are arranged in the water collecting pit, and a separation net is covered on the upper port of the water collecting pit;

(5) And (3) setting up an exhaust pipe on the screen, paving a gravel layer on the screen, covering backfill soil on the gravel layer, and installing a rain cap at the upper end of the exhaust pipe.