CN217903983U

CN217903983U - Temporary cable trench structure for construction transition stage

Info

Publication number: CN217903983U
Application number: CN202221695723.4U
Authority: CN
Inventors: 华坤; 沙少川; 刘伟亮; 吴尚志; 吴波; 徐静; 肖鑫鑫; 王熙骏
Original assignee: Shanghai Electric Power Design Institute Co Ltd
Current assignee: Shanghai Electric Power Design Institute Co Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-25
Anticipated expiration: 2032-07-01

Abstract

The utility model belongs to the technical field of cable construction, a temporary cable trench structure for a construction transition stage is disclosed, the temporary cable trench structure comprises a channel side slope, a channel pit bottom, a cross arm, a cable clamp, a grounding flat iron and a reinforced concrete cover plate, and the tops of the channel side slopes at two sides are inclined towards directions away from each other; the surfaces of the side slope of the trench and the bottom of the trench pit need to be repaired to be smooth; the cross arm is clamped between the side slopes of the channels at the two sides and used for supporting the cable; one end of the grounding flat iron is connected with the cross arm, and the other end of the grounding flat iron penetrates through the channel slope and extends into the soil body; the reinforced concrete cover plate is erected at the tops of the side slopes of the channels on the two sides. The utility model discloses combine the soil body side slope among the interim cable pit excavation process to set up, both possessed conventional operation requirements such as general cable pit cabling, electrical grounding, drainage, also show the convenience that has increased the construction, reduced newly-built and later stage demolish the engineering volume, shortened construction cycle.

Description

Temporary cable trench structure for construction transition stage

Technical Field

The utility model relates to a cable construction technical field especially relates to an interim cable pit structure for constructing transition phase.

Background

The cable trench is an underground pipeline for laying and replacing electric power or telecommunication cable facilities, is also an enclosure structure of laid cable facilities, and has pipeline structure forms of rectangle, circle, arch and the like. Generally, a cable trench is a trench with a cover plate, and a cable holder is installed in the trench and fixed on a trench wall for holding a cable. When cables are laid and maintained, the cover plate needs to be uncovered, the operation is complicated and inconvenient, and dirt and accumulated water are easy to deposit in the ditch. In some power transformation projects, temporary cable ducts for construction transition stages need to be arranged, the service life of the cable ducts is about several months to one year, the requirements on service life and daily operation and maintenance are not high, and only the normal use in the construction transition stages needs to be guaranteed. At this time, if the construction is still performed according to the standard of the general reinforced concrete cast-in-place cable trench, unnecessary construction investment and construction period are increased, and a large dismantling amount is also existed in the later period. Therefore, the temporary cable trench used in the construction transition stage should have basic functional requirements for cabling, electrical grounding, drainage and the like when in use, but a structural form which is more convenient to construct, smaller in engineering quantity, quicker to dismantle and shorter in construction period should be sought.

The person skilled in the art is dedicated to solving the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a interim cable pit structure for constructing transition phase, it is little with demolising the engineering volume to build, and construction cycle is short.

To achieve the purpose, the utility model adopts the following technical proposal:

a temporary cable trench structure for a construction transition stage comprises trench side slopes, trench pit bottoms, cross arms, cable clamps, grounding flat irons and reinforced concrete cover plates, wherein the tops of the trench side slopes on two sides are inclined in a direction away from each other; the surfaces of the channel side slope and the channel pit bottom need to be repaired to be smooth; the cross arm is clamped between the channel side slopes on the two sides and used for supporting cables; one end of the grounding flat iron is connected with the cross arm, and the other end of the grounding flat iron penetrates through the channel side slope and extends into a soil body; the reinforced concrete cover plates are erected at the tops of the channel side slopes on the two sides.

Preferably, the slope rate of the channel side slopes on both sides is not more than 1.75, and each the surface of channel side slope is provided with 5 centimetres of thickness plain concrete surface course, and inserts a plurality of bank protection short reinforcement, the diameter of bank protection short reinforcement is 6-8 millimeters, and single length is not less than 10 centimetres, and a plurality of bank protection short reinforcement is along the slope body plane of channel side slope is quincunx and is arranged, and level, vertical interval are not more than 200 millimeters.

Preferably, a plain concrete cushion layer with the thickness not less than 10 cm is arranged on the surface of the bottom of the trench pit, a fine sand permeable layer with the thickness not less than 10 cm is arranged at the position close to one side of the trench slope, and the plain concrete cushion layer is used for one-way slope finding towards the fine sand permeable layer according to the slope rate of 2 per thousand.

Preferably, the cross arm is angle steel, two ends of the cross arm are processed into shapes fitting the channel side slopes, and the cross arm is clamped and limited in the middles of the channel side slopes on two sides.

Preferably, the cable clamp is fixed on the cross arm through a bolt connecting piece; and the grounding flat iron is welded with the cross arm.

Preferably, a plurality of pull rings are arranged on the reinforced concrete cover plate.

The utility model has the advantages that:

the utility model discloses the soil body side slope of excavation sets up when combining interim cable pit to build, directly sets up the channel side slope of slope in the soil pit after the excavation, forms the opening section of "big-end-up. Thus, when the cross arm bearing the cable is placed later, the cross arm can be stably clamped on the side slopes of the two side channels without falling. Similar to the cross-arm, the reinforced concrete cover plate does not fall down, thereby protecting the cables inside. The cross arm and the reinforced concrete cover plate are installed without using embedded parts. And then, when the temporary cable trench is dismantled, the reinforced concrete cover plate is directly uncovered, and then the cross arm is upwards taken up. The whole building and dismantling process is convenient and fast. Besides, the fine sand permeable layer at the bottom of the cable trench discharges rainwater flowing into the cable trench, so that water is not accumulated easily in the trench. The grounding flat iron is connected with the cross arm of the supporting cable to realize electrical grounding. The temporary cable trench is used in the construction transition stage, not only has the conventional use requirements of common cable trench for cable laying, electrical grounding, drainage and the like, but also obviously increases the convenience of construction, reduces the engineering quantity of new construction and later-stage demolition, and shortens the construction period.

Drawings

Fig. 1 is a schematic structural diagram of a temporary cable trench provided in an embodiment of the present invention.

In the figure:

1. a trench side slope; 11. plain concrete surface course; 12. slope protection short steel bars; 2. a trench pit bottom; 21. a plain concrete cushion; 22. a fine sand permeable layer; 3. a cross arm; 4. a cable clamp; 41. a bolt connection; 5. grounding flat iron; 6. a reinforced concrete cover plate; 61. and (4) a pull ring.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and can include, for example, fixed or removable connections, mechanical or electrical connections, direct connections, indirect connections through an intermediary, communication between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not in direct contact, but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The embodiment provides a temporary cable trench structure for a construction transition stage, which comprises a trench side slope 1, a trench pit bottom 2, a cross arm 3, a cable clamp 4, a grounding flat iron 5 and a reinforced concrete cover plate 6, as shown in fig. 1. The tops of the channel side slopes 1 on the two sides incline to the direction away from each other; the surfaces of the channel side slope 1 and the channel pit bottom 2 are required to be repaired to be smooth; the cross arm 3 is clamped between the channel side slopes 1 on the two sides and used for supporting cables; one end of the grounding flat iron 5 is connected with the cross arm 3, and the other end of the grounding flat iron penetrates through the channel side slope 1 and extends into the soil body; the reinforced concrete cover plate 6 is erected on the tops of the side slopes 1 with the channels on the two sides.

Specifically, the slope rate of both sides channel side slope 1 is all not more than 1.75 to guarantee channel side slope 1's stability, make cross arm 3 can block the limit between both sides channel side slope 1 and stabilize, be difficult for dropping. The surface of both sides channel side slope 1 all is provided with 5 centimetres thick plain concrete surface course 11 to insert a plurality of bank protection short reinforcement 12, suitably strengthens the intensity of channel side slope 1, makes channel side slope 1 can be connected firmly with the soil body. The diameter of the slope protection short steel bars 12 is 6-8 mm, the length of each short steel bar is not less than 10 cm, the slope body plane of the plurality of slope protection short steel bars 12 along the channel side slope 1 is in quincunx arrangement, and the horizontal and vertical intervals are not more than 200 mm.

Specifically, a plain concrete cushion layer 21 with the thickness of not less than 10 centimeters is arranged on the surface of the trench bottom 2, and a fine sand permeable layer 22 with the thickness of not less than 10 centimeters is arranged at the position close to the trench side slope 1 on one side. The plain concrete cushion layer 21 unidirectionally finds a slope to the fine sand permeable layer 22 according to the slope rate of 2 per thousand so as to effectively discharge rainwater in the temporary cable trench into a soil layer.

Specifically, the cross arm 3 is an angle steel, two ends of the angle steel are processed into shapes fitting the channel side slopes 1, and the angle steel is clamped and limited in the middles of the channel side slopes 1 on two sides. Because the whole section is large at the top and small at the bottom, the two ends of the angle steel clamped and limited in the middle part can not fall off without measures such as embedded parts and the like.

Specifically, the cable clamp 4 is fixed on the cross arm 3 through a bolt connecting piece 41 for fixing the cable, and the grounding flat iron 5 is welded with the cross arm 3.

Specifically, the reinforced concrete cover plate 6 is provided with a plurality of pull rings 61, and the thickness and the reinforcing bars of the reinforced concrete cover plate 6 are calculated and determined according to the construction load above the reinforced concrete cover plate. When the temporary cable trench is not used, the trench space backfill earthwork can be directly compacted without leaving obvious underground obstacles, and the demolition work amount is small.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A interim cable pit structure for construction transition phase its characterized in that: the temporary cable trench structure comprises trench side slopes (1), trench pit bottoms (2), cross arms (3), cable clamps (4), grounding flat irons (5) and reinforced concrete cover plates (6), wherein the tops of the trench side slopes (1) on two sides are inclined towards directions away from each other; the surfaces of the channel side slope (1) and the channel pit bottom (2) are required to be repaired and leveled; the cross arm (3) is clamped between the channel side slopes (1) at two sides and used for supporting cables; one end of the grounding flat iron (5) is connected with the cross arm (3), and the other end of the grounding flat iron penetrates through the channel side slope (1) and extends into a soil body; the reinforced concrete cover plates (6) are erected at the tops of the channel side slopes (1) on the two sides.

2. The temporary cable trench structure for construction transition stage according to claim 1, wherein: both sides the slope rate of channel side slope (1) all is not more than 1.75, and every the surface of channel side slope (1) is provided with plain concrete surface course (11) that 5 centimetres are thick, and inserts a plurality of bank protection short reinforcement (12), the diameter of bank protection short reinforcement (12) is 6-8 millimeters, and single length is not less than 10 centimetres, and is a plurality of bank protection short reinforcement (12) are followed the slope body plane of channel side slope (1) is the quincunx and arranges, and level, vertical interval all are not more than 200 millimeters.

3. The temporary cable trench structure for construction transition stage according to claim 1, wherein: the surface of the channel pit bottom (2) is provided with a plain concrete cushion layer (21) with the thickness not less than 10 centimeters, a fine sand permeable layer (22) with the thickness not less than 10 centimeters is arranged at the position close to the channel side slope (1), and the plain concrete cushion layer (21) can be used for one-way slope finding of the fine sand permeable layer (22) according to the slope rate of 2 per thousand.

4. The temporary cable trench structure for construction transition stage according to claim 1, wherein: the cross arm (3) is an angle steel, the two ends of the cross arm are processed into shapes which are attached to the channel side slopes (1), and the cross arm is clamped and limited in the middle of the channel side slopes (1).

5. The temporary cable trench structure for construction transition stage according to claim 1, wherein: the cable clamp (4) is fixed on the cross arm (3) through a bolt connecting piece (41); the grounding flat iron (5) is welded with the cross arm (3).

6. The temporary cable trench structure for construction transition stage according to claim 1, wherein: and a plurality of pull rings (61) are arranged on the reinforced concrete cover plate (6).