CN217758919U

CN217758919U - Installation construction structure of box transformer substation in soft soil layer

Info

Publication number: CN217758919U
Application number: CN202221794461.7U
Authority: CN
Inventors: 钱勇; 钱叶; 刘和东
Original assignee: Sichuan Yonglian Power Equipment Co ltd
Current assignee: Sichuan Yonglian Power Equipment Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-11-08
Anticipated expiration: 2032-07-12

Abstract

The utility model relates to a soft soil layer box transformer substation installation construction structure, including foundation ditch and box transformer substation, the bottom of foundation ditch is provided with bed course and first enhancement post, and the upper surface of bed course is provided with the bottom plate, and the upper end of first enhancement post is located the bottom plate, and the lower extreme stretches into in the soil; the side wall of the foundation pit is obliquely arranged, a reinforcing layer and a second reinforcing column are arranged on the side wall of the foundation pit, the lower part of the reinforcing layer is connected with the bottom plate, the lower end of the second reinforcing column extends into the soil, and the upper end of the second reinforcing column is positioned in the reinforcing layer; the edge of bottom plate is provided with vertical side wall, is provided with the backfill between side wall and the enhancement layer, and the upper end of side wall is higher than ground, and the box transformer substation is installed in the top of side wall. The utility model discloses set up enhancement layer and second at the foundation ditch lateral wall and strengthen the post, set up bed course and first enhancement post in the foundation ditch bottom simultaneously to make the enhancement layer link to each other with the bottom plate, can improve the stability on basis, the basis has obtained the reinforcement, can prevent that the basis from subsiding, slope, the stability of guarantee box transformer substation installation.

Description

Installation construction structure of box transformer substation in soft soil layer

Technical Field

The utility model belongs to the technical field of the case becomes the construction, especially, weak soil layer case becomes construction and installation structure.

Background

An 800KVA box-type substation needs to be installed in suburban construction engineering of a certain construction unit, because the soil layer at the construction position is a soft soil layer and the bearing capacity is weak, when the box-type substation is installed according to a conventional construction method, conditions such as foundation settlement, inclination and the like can occur, and the installation and construction requirements of the box-type substation are difficult to meet. In addition, the soft soil layer can cause the increase of the grounding resistance, and the grounding requirement is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a soft soil layer case becomes installation construction structure is provided, can guarantee the stability of case transformer substation installation, prevents that the case transformer substation basis from subsiding or inclining.

In order to solve the above problem, the utility model adopts the technical scheme that: the soft soil layer box transformer substation installation construction structure comprises a foundation pit and a box transformer substation, wherein a cushion layer and a first reinforcing column are arranged at the bottom of the foundation pit, a bottom plate is arranged on the upper surface of the cushion layer, the upper end of the first reinforcing column is positioned in the bottom plate, and the lower end of the first reinforcing column extends into soil; the side wall of the foundation pit is obliquely arranged, a reinforcing layer and a second reinforcing column are arranged on the side wall of the foundation pit, the lower part of the reinforcing layer is connected with the bottom plate, the lower end of the second reinforcing column extends into the soil, and the upper end of the second reinforcing column is positioned in the reinforcing layer; the edge of bottom plate is provided with vertical side wall, be provided with the backfill between side wall and the enhancement layer, the upper end of side wall is higher than ground, the box transformer substation is installed in the top of side wall.

Furthermore, a threading hole is formed in the side wall.

Further, the cushion layer includes a fine sand layer and a gravel layer located above the fine sand layer.

Further, the bottom plate and the reinforcing layer are integrally cast to form a concrete slab.

Furthermore, a conductive support beam is arranged at the top of the side wall, a horizontal conductive plate is arranged at the top of the first reinforcing column, the conductive support beam is connected with the conductive plate through a down conductor, a vertical grounding column is arranged inside the first reinforcing column, the lower end of the grounding column extends into the soil, and the upper end of the grounding column is connected with the conductive plate.

Furthermore, the conductive support beam is a channel steel, the first reinforcing column is a concrete column, the conductive plate is a steel plate, and the grounding column is a steel pipe.

Further, concrete is poured in the steel pipe.

Further, the second reinforcing column is made of round steel.

Further, the upper surface slope of bottom plate sets up, and is provided with water drainage tank in the lower of bottom plate upper surface, water drainage tank intussuseption is filled with fine sand.

Furthermore, a ladder is arranged on the ground outside the side wall.

The utility model has the advantages that: conventional foundation ditch is the comparatively regular rectangular bodily form of shape, and the lateral wall is vertical, the utility model discloses set up the lateral wall slope of foundation ditch to set up enhancement layer and second at the foundation ditch lateral wall and strengthen the post, set up bed course and first enhancement post in the foundation ditch bottom simultaneously, and make the enhancement layer link to each other with the bottom plate, can improve the stability on basis, the basis has obtained the reinforcement, can prevent that the basis from subsiding, inclining, thereby guarantee the stability of case transformer substation installation, satisfy the construction process requirement.

Drawings

Fig. 1 is a schematic view of the present invention;

reference numerals: 1-cushion layer; 2-a bottom plate; 3-a first reinforcement column; 4-a reinforcing layer; 5-a second reinforcing column; 6, side wall; 7-backfilling; 8, the ground; 9-threading holes; 10, box transformer substation; 11-an electrically conductive support beam; 12-a conductive plate; 13-a ground post; 14-down conductor; 15-a drainage channel; 16-step.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

The utility model discloses a soft soil layer box transformer substation installation construction structure, as shown in fig. 1, including foundation ditch and box transformer substation 10, the bottom of foundation ditch is provided with bed course 1 and first reinforcement post 3, the upper surface of bed course 1 is provided with bottom plate 2, the upper end of first reinforcement post 3 is located in bottom plate 2, the lower extreme of first reinforcement post 3 stretches into in the soil; the side wall of the foundation pit is obliquely arranged, a reinforcing layer 4 and a second reinforcing column 5 are arranged on the side wall of the foundation pit, the lower part of the reinforcing layer 4 is connected with the bottom plate 2, the lower end of the second reinforcing column 5 extends into the soil, and the upper end of the second reinforcing column 5 is positioned in the reinforcing layer 4; the edge of bottom plate 2 is provided with vertical side wall 6, is provided with backfill soil 7 between side wall 6 and the enhancement layer 4, and the upper end of side wall 6 is higher than ground 8, and box transformer substation 10 installs in the top of side wall 6.

The installation basis of box transformer substation 10 is constituteed such as bottom plate 2, side wall 6, enhancement layer 4, first reinforcement post 3 and second reinforcement post 5, and wherein, bottom plate 2 and enhancement layer 4 adopt concrete placement to form, can pour bottom plate 2 and enhancement layer 4 simultaneously for bottom plate 2 and enhancement layer 4 form a whole, thereby improve stability.

The side wall 6 can be built by bricks or can be a reinforced concrete wall, the thickness of the side wall 6 is between 40cm and 50cm, the upper end of the side wall is higher than the ground 8 by about 30 cm to 40cm, the waterproof capability of the box-type substation 10 can be improved, and external rainwater and the like are prevented from entering the box-type substation 10. The side wall 6 is provided with a threading hole 9 for laying an incoming and outgoing cable, and the threading hole 9 can be one or more and is determined according to cable laying requirements. The through wires hole 9 is reserved during the construction of the side wall 6, the stainless steel material through wires pipe can be pre-buried in the side wall 6, and the inner hole of the through wires pipe is used as the through wires hole 9.

The bed course 1 is located between the soil layer of foundation ditch bottom and bottom plate 2, can consolidate the soil layer of foundation ditch bottom, improves bearing capacity, and specifically, bed course 1 includes fine sand layer and gravel layer, and the gravel layer is located the top of fine sand layer. The fine sand layer is made of fine sand with the particle size of less than 2mm and the thickness of about 10cm, and the gravel layer is made of gravel with the particle size of 5mm to 8mm and the thickness of about 8cm. When the gravel layer is paved, fine sand is paved firstly and tamped, then the gravel layer is paved and tamped, cement mortar can be smeared on the surface of the gravel layer, the surface of the gravel layer is leveled, and then the bottom plate 2 is poured.

The first reinforcing column 3 and the second reinforcing column 5 are used for reinforcing the soft soil layer and improving the anti-falling and anti-inclination capabilities of the foundation. The first reinforcing column 3 and the second reinforcing column 5 can be both metal columns or concrete columns, preferably, the first reinforcing column 3 is a concrete column which can be a square column or a circular column, the cross-sectional area of the first reinforcing column is larger than that of the second reinforcing column 5, and the supporting capacity is high. The second reinforced column 5 is round steel, and the soil layer can be squeezed into fast to the round steel, need not to pour after punching, construction convenience.

In order to reduce ground resistance, the top of side wall 6 is provided with electrically conductive supporting beam 11, and electrically conductive supporting beam 11 is the channel-section steel, and its opening is downward, when building by laying bricks or stones side wall 6, with the channel-section steel pre-buried at 6 tops of side wall, when the installation case becomes 10, the channel-section steel becomes 10's shell welding with the case, makes channel-section steel and case become 10 shells and switches on, when the case becomes 10 and appears the electric leakage, the electric charge can transmit to the channel-section steel.

The top of the first reinforcing column 3 is provided with a horizontal conductive plate 12, the conductive support beam 11 is connected with the conductive plate 12 through a down conductor 14, the conductive plate 12 can be made of a steel plate, and the down conductor 14 can be made of a flat iron. The first reinforcing column 3 is internally provided with a vertical grounding column 13, the lower end of the grounding column 13 extends into the soil, the upper end of the grounding column 13 is connected with the conductive plate 12, and the grounding column 13 can be a steel pipe. The box transformer substation 10, the conductive support beam 11, the down lead 14, the conductive plate 12 and the grounding column 13 are connected in sequence, so that electric charges can be conducted underground, and grounding protection is realized. The lower end of the grounding post 13 goes deep into the ground, so that the falling resistance and the inclination resistance of the foundation can be further improved, and the grounding function can be achieved. Concrete can be poured in the steel pipe, and the strength of the steel pipe is improved. Except the earthing pole 13, still according to the mode commonly used earthing device has set up, if squeeze into many earthing poles around the foundation ditch, the earthing pole adopts the galvanized angle steel, link to each other through electrically conductive crossbeam between the two adjacent earthing poles, the earthing pole links to each other with earthing pole 13 through electrically conductive crossbeam simultaneously, electrically conductive crossbeam can adopt galvanized angle steel or galvanized band iron, and electrically conductive supporting beam 11 links to each other with the earthing pole through electrically conductive materials such as galvanized band iron, form the less ground net of ground resistance. The surfaces of the conductive support beam 11, the down lead 14, the conductive plate 12 and the grounding column 13 can be galvanized to improve the corrosion resistance, the joints are connected by welding, and the surface of the welding seam is sprayed with anticorrosive materials such as asphalt and the like after welding, so that the corrosion resistance of the welding seam is improved, and the service life is ensured.

In order to discharge the rainwater that gets into the foundation ditch in time, the upper surface slope of bottom plate 2 sets up, and is provided with water drainage tank 15 in the lower of 2 upper surfaces of bottom plate, and water drainage tank 15 intussuseption is filled with fine sand. Rainwater flows to the bottom plate 2 after permeating the inside of the foundation and flows to the drainage groove 15 along the upper surface of the bottom plate 2, and then is discharged to the outside soil layer from the drainage groove 15.

In order to facilitate the installation of the box-type substation 10, steps 16 are provided on the ground 8 outside the side walls 6, and the steps 16 may be formed by pouring concrete.

The utility model discloses a concrete construction method does:

1. and (5) excavating a foundation pit and constructing the grounding device.

2. Punching a hole at the bottom of the foundation pit, placing the grounding post 13 into the hole, and driving the grounding post 13 into the ground to ensure that the grounding post 13 is basically positioned in the center of the hole; and then, driving a plurality of second reinforcing columns 5 into the side wall of the foundation pit, wherein the second reinforcing columns 5 are vertical to the side wall of the foundation pit.

3. And welding the conductive plate 12 at the upper end of the grounding column 13, spraying asphalt on a welding line, and then pouring the first reinforcing column 3, wherein the upper end of the first reinforcing column 3 is higher than the bottom of the foundation pit by about 20 cm.

4. And paving a fine sand layer with the thickness of about 10cm at the bottom of the foundation pit, paving a gravel layer with the thickness of about 8cm on the surface of the fine sand layer after tamping, and smearing cement mortar on the surface of the gravel layer after tamping.

5. Welding the lower end of the down lead 14 on the conductive plate 12, and spraying asphalt on the welding line; then build the template, pour bottom plate 2 and enhancement layer 4, reserve out water drainage tank 15 when pouring bottom plate 2, after the intensity of bottom plate 2 and enhancement layer 4 reached the designing requirement, demolish the template, pack fine sand in water drainage tank 15.

6. The side wall 6 is built, a threading hole 9 is reserved, and a conductive support beam 11 is welded at the upper end of the down conductor 14.

7. And detecting the grounding resistance to ensure that the grounding resistance is not more than 4 omega. And if the grounding resistance does not meet the requirement, increasing the number of grounding electrodes.

8. Cement mortar is coated on the two side surfaces of the side walls 6 and the upper surface of the bottom plate 2; soil is backfilled in the space between the side wall 6 and the reinforcing layer 4 and tamped.

9. And pouring a step 16 on the ground 8 on the outer side surface of the side wall 6, and installing the box transformer substation 10 after the strength of the step 16 meets the design requirement.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Weak soil layer case becomes installation construction structures, its characterized in that: the foundation pit and box transformer substation structure comprises a foundation pit and a box transformer substation (10), wherein a cushion layer (1) and a first reinforcing column (3) are arranged at the bottom of the foundation pit, a bottom plate (2) is arranged on the upper surface of the cushion layer (1), the upper end of the first reinforcing column (3) is positioned in the bottom plate (2), and the lower end of the first reinforcing column (3) extends into soil; the side wall of the foundation pit is obliquely arranged, a reinforcing layer (4) and a second reinforcing column (5) are arranged on the side wall of the foundation pit, the lower portion of the reinforcing layer (4) is connected with the bottom plate (2), the lower end of the second reinforcing column (5) extends into soil, and the upper end of the second reinforcing column (5) is located in the reinforcing layer (4); the edge of bottom plate (2) is provided with vertical side wall (6), be provided with backfill (7) between side wall (6) and enhancement layer (4), the upper end of side wall (6) is higher than ground (8), install in the top of side wall (6) case becomes (10).

2. The weak soil layer box transformer substation installation construction structure of claim 1, characterized in that: and threading holes (9) are formed in the side walls (6).

3. The soft soil layer box transformer substation installation construction structure of claim 1, characterized in that: the underlayment (1) comprises a fine sand layer and a gravel layer, wherein the gravel layer is positioned above the fine sand layer.

4. The weak soil layer box transformer substation installation construction structure of claim 1, characterized in that: the bottom plate (2) and the reinforcing layer (4) are integrally cast into a concrete slab.

5. The weak soil layer box transformer substation installation construction structure of claim 1, characterized in that: the top of side wall (6) is provided with electrically conductive supporting beam (11), the top of first enhancement post (3) is provided with horizontal current conducting plate (12), electrically conductive supporting beam (11) link to each other with current conducting plate (12) through downlead (14), first enhancement post (3) inside is provided with vertical ground connection post (13), the lower extreme of ground connection post (13) stretches into in the soil, and the upper end links to each other with current conducting plate (12).

6. The weak soil layer box transformer substation installation construction structure of claim 5, characterized in that: the conductive supporting beam (11) is a channel steel, the first reinforcing column (3) is a concrete column, the conductive plate (12) is a steel plate, and the grounding column (13) is a steel tube.

7. The soft soil layer box transformer substation installation construction structure of claim 6, characterized in that: concrete is poured in the steel pipe.

8. The soft soil layer box transformer substation installation construction structure of claim 1, characterized in that: the second reinforcing column (5) is made of round steel.

9. The weak soil layer box transformer substation installation construction structure of claim 1, characterized in that: the upper surface slope of bottom plate (2) sets up, and is provided with water drainage tank (15) in the lowest department of bottom plate (2) upper surface, water drainage tank (15) intussuseption is filled with fine sand.

10. The weak soil layer box transformer substation installation construction structure of claim 1, characterized in that: and a step (16) is arranged on the ground (8) outside the side wall (6).