CN204040163U - cable trench drainage structure - Google Patents

Abstract

The utility model provides a cable ditch drainage structure, which comprises: a water collecting ditch, a seepage well and a connecting pipe. The water collecting ditch is located at the bottom of the cable trench of a road section; the seepage well is located outside the cable trench of the passage road section; the connecting pipe is used for connecting the water collecting ditch and the seepage well. The utility model can achieve the purpose of automatically discharging the accumulated water in the cable ditch of the road section.

Description

cable trench drainage structure

technical field

The utility model relates to a cable ditch drainage structure, in particular to a cable ditch drainage structure in a road section.

Background technique

The problem of water accumulation in the cable trench in the substation has always been a hidden danger to the safety of the substation area. Safety accidents caused by water-soaked cables in cable trenches occur from time to time. In order to avoid this phenomenon and further improve and ensure the safe operation of cables, it is necessary to pay attention to the drainage of cable trenches.

In a cable trench in a substation, usually the cable trench will pass through the road in the station and cross perpendicularly with the road in the station. The road in the station will be 150mm to 200mm lower than the ground in the station area. The bottom of the trench will be about 500mm lower than the bottom of the cable trench on the road section. However, if the net space of the cable trench remains unchanged in the cable trench at the road in the crossing station, the accumulated water on both sides of the cable trench in the passing road section will naturally sink to the bottom of the cable trench in the passing road section. Waterlogged in the cable trench of the road section. In response to this phenomenon, in the prior art, a water pump is mainly placed at the position of the accumulated water, and when the accumulated water is too large, the accumulated water in the cable trench is drawn out. But adopting this method can only set water pump under the cable trench of some or a few passages, and it cannot guarantee that the accumulated water in the cable trench at each passage can be discharged. If the method of placing water pumps is adopted in every place, it will also lead to high equipment costs and maintenance costs, and special staff will be required to take care of them. Therefore, how to effectively and economically solve the water accumulation in the cable trench in the passage section Problem is the important problem that the utility model will discuss.

Utility model content

The technical problem to be solved by the utility model is to provide a cable ditch drainage structure to realize the effect that the accumulated water in the cable ditch of the road section can be automatically discharged.

The technical solution of the utility model is a cable ditch drainage structure, comprising:

The water collecting ditch is located at the bottom of the cable ditch in the passage section;

The seepage well is located outside the cable trench of the section of the passage;

The connecting pipe is used for connecting the gutter and the seepage well.

The cable ditch drainage structure as described above, wherein iron grates are arranged on the water collecting ditch.

The cable trench drainage structure as described above, wherein the bottom of the seepage well is 1.0m-1.2m lower than the bottom of the water collection ditch.

The above-mentioned cable trench drainage structure, wherein a graded sandstone cushion and a medium-sand cushion are arranged at the bottom of the seepage well.

The cable trench drainage structure as described above, wherein the graded sandstone cushion layer includes stones and sand, and the ratio of the stones to sand is 3:7, and the medium sand is arranged under the graded sandstone cushion layer As for the cushion layer, the thickness of the graded sandstone cushion layer is 600 mm to 1000 mm, and the thickness of the medium sand cushion layer is 900 mm to 1100 mm.

In the cable trench drainage structure described above, the diameter of the connecting pipe is proportional to the depth of the trench wall of the water collection trench, and the ratio is between 1/5 and 1.5/5.

The cable trench drainage structure as described above, wherein, the connecting pipe is located at a position lower than the trench wall of the water collecting trench.

The above-mentioned cable trench drainage structure, wherein, the first end of the connecting pipe extends into the water collecting ditch and is flat with the wall of the water collecting ditch, and the second end of the connecting pipe extends into the water seepage well and the well wall of the water seepage well flat.

The cable trench drainage structure above, wherein the connecting pipe is arranged obliquely, and the position of the first end of the connecting pipe is 100mm-200mm higher than the second end of the connecting pipe.

The cable trench drainage structure as described above, wherein a plurality of road cable trenches share a seepage well, and the roads and the plurality of cable trenches are interlaced to form a closed or non-closed arrangement.

To sum up, the drainage structure of the cable trench provided by the utility model can realize the effect of automatic drainage of accumulated water in the cable trench of the crossing road section, reduce maintenance costs and reduce manual care.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a cable trench in a road section in a specific embodiment of the present invention.

Fig. 2 is a schematic plan view of the cable trench in the passageway section in a specific embodiment of the present invention.

Explanation of symbols in the figure:

S0: cable trench in crossing road section

S01: Cable bracket

S02: plain concrete layer

S03: Pebble grouting layer

S1: road

S2: Sites on both sides of the road

S3: Ditch

S4: connecting pipe

S41: connect the first end of the tube

S42: Connect the second end of the tube

S5: seepage well

S51: Graded sand and gravel cushion

S52: medium sand cushion

Detailed ways

In order to make the utility model purpose and technical features of the utility model obvious and easy to understand, the following special examples are given in detail in conjunction with the accompanying drawings. The specific examples disclosed here are only used to illustrate the specific methods of the utility model, and It is not intended to limit the scope of the present utility model.

The utility model provides a cable ditch drainage structure for a road section, as shown in Figure 1, which is a schematic cross-sectional view of a cable ditch for a road section in a specific embodiment of the utility model, a cable bracket S01 is arranged inside the cable ditch S0, and the cable The bottom of the ditch is a plain concrete layer S02, and a pebble grouting layer S03 is arranged under the plain concrete layer S02. The cable trench drainage structure of the crossing road section includes: a water collecting ditch S3, a seepage well S5 and a connecting pipe S4. The water collecting ditch S3 is located at the bottom of the cable trench S0 of the passageway; the seepage well S5 is located outside the cable trench S0 of the passageway section; the connecting pipe S4 is used to connect the water collecting trench S3 and the seepage well S5.

According to the plan view of the cable trench in the crossing road section in a specific embodiment of the present invention, as shown in Figure 2, the water collecting ditch S3 is a rectangular groove, and the cross section of the water collecting ditch S3 is a square with a width and a height of 500 mm. , the length of the water collecting ditch is the same as the width of the cable ditch, as shown in Figure 1. The gutter S3 is preferably provided with an iron grate. Certainly, the size of the aforementioned water collection ditch is only used to illustrate the technical solution of the utility model, and is not used for specific limitation. The size and shape of the water collection ditch can be set according to the actual situation.

The connecting pipe can be a steel pipe or a PVC pipe fitting, which is not limited here and depends on the specific conditions of the construction of the cable trench.

Referring back to Fig. 1, the bottom of the seepage well is 1.0m to 1.2m lower than the bottom of the gutter. A graded sandstone cushion S51 and a medium sand cushion S52 are arranged at the bottom of the seepage well S5. The graded sand and gravel cushion layer S51 includes gravel and sand, the ratio of the said gravel and sand is preferably 3:7, and a medium sand cushion layer S52 is set under the graded sand and gravel cushion layer S51, and the graded sand and gravel cushion layer S52 is arranged. The thickness of the stone cushion layer S51 is preferably 600mm-1000mm, and the thickness of the medium-sand cushion layer S52 is preferably 900mm-1100mm.

Refer again to Fig. 1, shown in Fig. 2, in one embodiment of the present utility model, the pipe bottom elevation of this connecting pipe is 50mm higher than the ditch bottom elevation of water collecting ditch, in practical application, the diameter of this connecting pipe S4 and this collecting ditch The depth of the wall of the ditch S3 is proportional, and the ratio is preferably between 1/5 to 1.5/5, so as to facilitate rapid discharge of accumulated water in the gutter S3. The first end S41 of the connecting pipe is located at the lower part of the wall of the gutter, and is preferably located near the middle of the side wall of the gutter in the longitudinal direction, so as to avoid water accumulation in the gutter S3. Preferably, the first end S41 of the connecting pipe S4 is higher than the bottom of the gutter by a certain distance, for example, 100-200mm. In this way, it can facilitate the sinking of water and sand particles in the gutter, and avoid a large amount of sand under special circumstances. Stones enter the connecting pipe S4 and cause blockage, which affects the drainage of the cable trench.

Please refer again to shown in Fig. 1, the connecting pipe S4 that one embodiment of the present utility model chooses is the steel pipe that a diameter is 100mm, and the first end S41 of this connecting pipe stretches in the catchment ditch S3 and is connected with the ditch of the catchment ditch. The wall is flat, and the second end S42 of the connecting pipe extends into the seepage well S5 and is flush with the well wall of the seepage well. The connecting pipe S4 is arranged obliquely, and the first end S41 of the connecting pipe is higher than the second end S42 of the connecting pipe, for example, 100mm-200mm, or the angle between the connecting pipe S4 and the horizontal plane is preferably 5°- 15°, so that the water in the gutter can be quickly discharged into the seepage well through the connecting pipe.

Fig. 2 is a schematic plan view of the cable trench of the passageway section in a specific embodiment of the present invention, the seepage well S5 is located outside the cable trench S0 of the passageway section, and the seepage well S5 is preferably an internal expansion structure, as shown in Fig. 1 As shown, that is, it has an opening with a smaller diameter and a wellbore with an increased inner diameter, and the opening and the wellbore are connected by a tapered neck structure.

According to the above description, it can be seen that in a specific embodiment of the present utility model, a water seepage well S5 can also be shared by multiple road cable trenches S0, for example, for the situation where multiple roads and multiple cable trenches are staggered to form a "well" arrangement , if the mutual spacing is appropriate, the seepage well S5 can be selected to be located in the middle of the word "well", such as the center position, etc., so that the water collection ditch S3 at the bottom of the cable trench S0 of multiple crossing roads can be connected through the connecting pipe S4 To the seepage well S5, automatic drainage of multiple cable trenches can be realized, and the construction cost can also be greatly reduced. Of course, it is not limited to the above-mentioned "well" arrangement, other closed or non-closed multiple cable trenches such as triangle, polygon, U-shape, etc. can be implemented by sharing the seepage well.

The utility model can set the water collecting ditch S3 at the bottom of the road cable ditch S0 after the formation of the road cable ditch S0, and pre-bury the steel pipe on the side of the cable ditch; set the seepage well S5 outside the crossing road cable ditch S0, the A medium-sand cushion layer S52 is arranged at the bottom of the seepage well S5, and a graded sandstone cushion layer S51 is arranged on the medium-sand cushion layer S52. The thickness of the graded sandstone cushion layer S51 is 600 mm to 1000 mm. The thickness of the medium sand cushion layer S52 is 900mm-1100mm, and the bottom of the seepage well S5 is 1.0m-1.2m lower than the bottom of the gutter S3; steel pipes on the side of the seepage well are pre-buried at a predetermined position between the gutter and the seepage well , and communicate with the steel pipe on the side of the cable trench to form a connecting pipe, connect the water collecting ditch S3 and the seepage well S5 with the connecting pipe S4, connect the pipe S4 obliquely, and set the connecting pipe at the lower position of the wall of the water collecting ditch The first end S41 of the pipe; the second end S42 of the connecting pipe is provided at the well wall of the seepage well, wherein the first end S41 of the connecting pipe is 100mm-200mm higher than the second end S42 of the connecting pipe.

Reinforced concrete cable trench construction sequence: plain soil tamping→pebble cushion→poured concrete cushion; binding bottom plate and side wall reinforcement; formwork; pre-embedded steel pipes; pouring cable trench bottom plate and side wall concrete; Set up formwork, tie steel bars on the passing cable trench, pour concrete as the cable trench roof and road surface; set expansion joints at the connection between the road surface and the phase side.

Construction sequence of seepage wells: tamping of medium sand layer; tamping of graded sand and gravel layer; masonry of brick seepage wells and pre-embedded steel pipes. Preferably, the bottom of the seepage well is larger than the head of the well and retracts toward the ground in a trumpet shape. The diameter of the bottom of the well is 500-1000mm wider than the head of the well. Such a large bottom space is conducive to the improvement of water seepage efficiency.

For each technical detail of the specific construction steps, reference may be made to the foregoing description about the drainage structure and the prior art, and details will not be repeated here.

To sum up, the utility model can realize the effect of automatic discharge of accumulated water in the cable ditch of the crossing road section, and at the same time reduce maintenance costs and manual care. The specific embodiments are not intended to limit the utility model, and the size, material and location of the water collecting ditch, the connecting pipe and the seepage well depend on the specific conditions of the substation. Any person skilled in the technical field can make some changes without departing from the spirit and scope of the present utility model, and the protection scope of the present utility model depends on the scope described in the claims.

Claims (9)

1. A cable ditch drainage structure, the cable ditch drainage structure comprises a road section cable ditch, characterized in that the cable ditch drainage structure comprises: The water collecting ditch is located at the bottom of the cable ditch in the passage section; Water seepage well, located outside the cable trench of the crossing section; The connecting pipe is used for connecting the gutter and the seepage well. the 2. The cable ditch drainage structure according to claim 1, characterized in that an iron grate is arranged on the water collecting ditch. the 3. The cable trench drainage structure according to claim 1, characterized in that the bottom of the seepage well is 1.0m-1.2m lower than the bottom of the water collecting ditch. the 4. The cable trench drainage structure according to claim 1, characterized in that a graded sandstone cushion and a medium sand cushion are arranged at the bottom of the seepage well. the 5. The cable trench drainage structure according to claim 1, characterized in that, the diameter of the connecting pipe is proportional to the depth of the wall of the gutter, and the ratio is between 1/5 and 1.5/5. the 6 . The drainage structure for cable trenches according to claim 5 , wherein the connecting pipe is located at a position lower than the trench wall of the gutter. 7 . the 7. The cable trench drainage structure according to claim 1, characterized in that, the first end of the connecting pipe extends into the gutter and is flush with the ditch wall of the gutter, and the second end of the connecting pipe extends into the water seepage The center of the well is level with the well wall of the seepage well. the 8. The cable trench drainage structure according to claim 7, wherein the connecting pipe is arranged obliquely, and the position of the first end of the connecting pipe is 100mm-200mm higher than the second end of the connecting pipe. the 9. The cable trench drainage structure according to any one of claims 1 to 8, characterized in that a plurality of road cable trenches share a seepage well, and the roads and multiple cable trenches are interlaced to form a closed or non-closed arrangement. the