CN108777470A - A kind of cable duct bank and its construction method - Google Patents

Abstract

The invention discloses a cable pipe arrangement and a construction method thereof. The cable conduit includes a pipe body, a cable duct and a joint U-shaped clamping pillow. The cable duct runs through the interior of the pipe body, and the end surface of the pipe body is provided with a protruding lap joint; the lap joint is placed on the joint U-shaped clamp. pillow. The cable pipe arrangement of the present invention can be produced modularly and assembled in modules, and can realize the assembly and arrangement of horizontal single-layer multi-column and multi-layer multi-row pipe arrangement, satisfying the arrangement forms of various existing pipe design, and having high construction efficiency , simple structure, wide application range, reliable laying connection, economical and environmental protection.

Description

A kind of cable pipe and its construction method

technical field

The invention relates to construction in the electric power field, in particular to a cable pipe arrangement and a construction method thereof.

Background technique

With the development needs of urbanization construction, power cables have gradually changed from aerial erection to underground laying.

The traditional cable laying, especially the laying of multiple cables, generally adopts the form of cable pipes. The foundation trench is excavated on site, the special cable pipes are laid, and then concrete is poured for curing. This traditional method has disadvantages such as large construction area, long construction period, and serious site pollution. Especially in the process of laying municipal cable pipes, it will cause urban roads to be blocked, and concrete pouring on site will pollute the environment and seriously affect people's daily life. , does not meet the needs of modern urban development.

Contents of the invention

Based on the above problems existing in the existing traditional construction technology, the present invention provides a cable pipe arrangement and a construction method thereof, which can realize factory production, assembly assembly and mechanized construction.

The technical scheme that the present invention adopts is as follows:

A cable pipe arrangement, comprising a pipe body, a cable duct and a joint U-shaped clamping pillow, the cable duct runs through the interior of the pipe body, and the end surface of the pipe body is provided with a protruding overlapping joint; the overlapping joint Place it in the U-shaped card pillow of the joint.

Further, the cable duct also includes a joint clamping plate, and the joint clamping plate is connected with the joint U-shaped clamping pillow to form an annular hoop.

Further, the joint clamping plate and the joint U-shaped clamping pillow are fixedly connected by bolts.

Further, a lifting device is pre-embedded on the cable conduit.

Further, the port of the overlapping staggered platform is chamfered.

Further, after the adjacent overlapping joints are docked in a staggered stage, a sealing strip is placed in the chamfered seam formed by the ports.

Further, the port of the cable duct is set as an arc chamfer or an enlarged bell mouth.

Further, the length of the protruding end surface of the overlapped staggered platform is 200 mm to 400 mm.

Further, the cable ducts are arranged in a matrix, arranged in rows×columns: 1×N, 2×N or 3×N, where N=2, 3 and 4.

A kind of construction method of cable pipe arrangement of the present invention, concrete steps are as follows:

1) Excavate the foundation trench, lay the cushion and level it;

2) Lay the U-shaped pillow of the joint, and bury the bottom beam of the U-shaped pillow of the joint in the cushion;

3) Hoist the cable pipes, put the overlapping joints of the pipes into the U-shaped clamping pillow of the joint, and ensure that the edges of the overlapping joints are aligned with the edges of the clamping pillows; according to the needs, carry out horizontal assembly of the cable pipes, And ensure that the overlapping staggered table is aligned in the lateral direction;

4) After the horizontal assembly is completed, paste a sealing strip at the chamfering position at the port of the overlapping staggered platform, and reserve a certain length of the sealing strip;

5) Assemble the cable pipes longitudinally along the axial direction of the cable pipes, put the overlapping joints of the pipes into the U-shaped clamping pillow of the joint and connect them with the overlapping joints of the horizontally assembled cable pipes. The edge of the staggered table is aligned with the edge of the card pillow; after the longitudinal assembly is completed, the reserved sealing strip is tightly attached to the chamfered seam formed by the butt joint of the two rows of pipes;

6) Install the joint clamping plate on the top of the joint U-shaped clamping pillow and compact it, and use bolts to fasten the joint clamping plate and the joint U-shaped clamping pillow as one;

7) Steps 4), 5) and 6) are repeated until the construction of a section is completed; finally, the foundation trench is backfilled, and the construction ends.

The beneficial effects of the present invention are:

(1) The cable pipe arrangement of the present invention can be produced and assembled in a modular manner, and can realize the assembly and arrangement of horizontal single-layer multi-row and multi-layer multi-row pipe arrangement, satisfying the arrangement forms of various existing pipe design.

(2) The U-shaped clamping pillow of the joint effectively hugs the horizontally arranged cable pipes together to form a whole, which limits the lateral movement of the cable pipes and ensures the integrity of the pipes and the accuracy of the butt connection of the longitudinal cable pipes; It forms an annular hoop with the joint clamping plate through bolts, and holds the cable pipes in both vertical and horizontal directions at the joint to further ensure the connection strength of the joint.

(3) The bottom beam of the joint U-shaped card sleeper can be thickened according to the engineering requirements, and also has the function of the sleeper, so that the cable pipe joints will not be displaced longitudinally and laterally due to the force, ensuring the integrity of the cable pipes. In areas with poor foundations, only the foundation treatment of the lower part of the U-shaped clamp can be done, and the pipe as a whole has a simply supported structure at both ends, which saves the overall foundation treatment cost.

(4) A circle of closed sealing rubber strips is set in the chamfered seam space formed at the overlapping joints. After being compacted and connected by clamps, the waterproof performance of the joints is effectively guaranteed to prevent mud water from seeping into the cables. inside the pipe.

(5) The arc chamfering of the port of the cable duct or one end is set as a flared bell mouth, which effectively eliminates the misalignment of the pipe opening caused by the inaccurate alignment of the two longitudinal sections of the pipe, ensures the smooth penetration of the cable, and eliminates the Scratching the cable by the wrong station.

(6) The construction methods of the cable pipes of the present invention all adopt dry connection, there is no large amount of wet work on site, environmental protection and pollution-free, no formwork disassembly operation, no need for concrete maintenance, the soil can be sealed to restore the original appearance of the site after installation, fast and efficient.

Description of drawings

Fig. 1 is a schematic diagram of the end face of the prefabricated cable pipe in the embodiment of the present invention, (a) the structure of the cable pipe, (b) another structure of the cable pipe.

Fig. 2 is a schematic side view of the prefabricated cable conduit in the embodiment of the present invention.

Fig. 3 is a schematic diagram of the joint card board, (a) front view, (b) side view.

Fig. 4 is a schematic diagram of a U-shaped clamping pillow of a joint, (a) a front view, (b) a side view.

Fig. 5 is a schematic transverse cross-sectional view of the assembly joint of the cable pipe arrangement.

Fig. 6 is a schematic diagram of a longitudinal section of a cable pipe assembly joint.

Fig. 7 is a schematic diagram of the installation of cable ducts in the embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, the cable duct in this embodiment includes a pipe body 1, a cable duct and an overlapping joint 3. The cross section of the pipe body 1 is rectangular, and the two ends are provided with an overlapping joint 3, and the interior is provided with Cable conduit. In the pipe body 1, only the cable duct 2 with a larger diameter can be arranged (see figure (a)), or the cable duct 2 and the communication cable duct 4 with a smaller diameter can be arranged at the same time (see figure (b)). The periphery of the cable duct is arranged with steel bars, and the cable duct is formed by pouring concrete as a whole.

As shown in FIG. 2 , the overlapping joint 3 is also rectangular and protrudes from the end surface of the pipe body 1 , and the protruding length is 200 mm to 400 mm. The cross-section of the overlapping staggered platform 3 is smaller than that of the pipe body 1 , and the side walls around the overlapping staggered platform 3 are inwardly recessed by 20 mm to 40 mm. The four peripheral corners at the ends of the lapped wrong platform 3 are all chamfered 6 at 10mm-20mm*45°. The upper surface of the pipe body 1 is pre-embedded with a lifting nail 5 as a lifting device, and of course other lifting structures such as lifting rings or threaded sleeves can also be used.

The cross-section of the cable duct is circular or rectangular, and it is pre-embedded or formed by concrete core-pulling for special cable ducts. The inner diameters (side lengths) of the ducts are not the same, and the ducts are arranged in a matrix, arranged in rows and columns: 1 ×N, 2×N, 3×N (N=2, 3, 4). The ports of the cable ducts are all chamfered in an arc, and the radius of the arc 7 is 10-20mm. Or set one end of the two ports of the cable duct as a flared mouth, and the other end as a normal size. Through the setting of arc chamfering or bell mouth, the cable can be smoothly inserted into the pipe, and the scratch on the cable caused by the misalignment of the pipe mouth can be eliminated.

The lap joint staggered platform 3 is placed in the U-shaped clamping pillow 8 of the joint. The joint U-shaped clamping pillow 8 is composed of two side walls 9 and a bottom beam 10, and the whole is a reinforced concrete structure. The wall thickness of the side wall 9 in this embodiment is 60 mm to 100 mm, the internal net height = the height of the lap joint of the cable pipe, the length = twice the length of the lap joint, and the upper part of the side wall 9 is pre-embedded with a threaded sleeve 11 . Bottom beam 10 has a thickness of 60mm to 400mm, internal clear width = the width of one cable pipe overlap joint + the sum of the total width of the other joints horizontally parallel cable pipes, length = 2 times the length of the overlap joint.

The structure of the joint clamp 12 is shown in Figure 4. In this embodiment, the joint clamp 12 is a rectangular reinforced concrete slab with a thickness of 60 mm to 100 mm. Fastening bolt mounting holes 13 are reserved at both ends of the plate, and the length of the joint clamp = The inner net length of the bottom beam + 2* side wall thickness. The bolt mounting holes 13 correspond to the threaded sleeves 11 and are tightly connected by bolts to connect the joint clamping plate 12 and the joint U-shaped clamping pillow 8 to form a closed ring.

The cable pipe arrangement of this embodiment can be flexibly assembled in both vertical and horizontal directions, and the horizontal pipe sections are closely arranged side by side. Form a whole in the horizontal direction; the overlapping wrong platform 3 of the two vertical cable pipes is overlapped with the U-shaped clamping pillow 8 of the joint, and the top of the U-shaped clamping pillow 8 of the joint is fastened with the clamping plate 12 of the joint with bolts 15 to form an annular hoop , to connect and fix the vertical cable conduit joints. Lap the chamfered edges of the wrong platform 3, after the longitudinal cable pipes are butted, a circular chamfered seam is formed around the end face of the seam, and a ring of sealing rubber strips is placed in the chamfered seam.

As shown in Figures 5, 6 and 7, the construction method of the cable pipe arrangement of the present embodiment is as follows:

1) Measure the setting-out, excavate the foundation trench, lay the cushion 14 and level it. The cushion 14 is a sandstone cushion, divided into upper and lower layers, and the lower layer is natural graded crushed stone, wherein the maximum particle size is not suitable More than 25mm, the upper layer is medium sand and coarse sand.

2) Hoist the U-shaped card pillow 8 of the joint, and position and level it. The longitudinal distance is the same as the length of the cable pipe. A part of the bottom beam 10 of the card pillow is buried in the cushion 14. The thickness of the cushion under the bottom beam 10 is the same as that of the normal cushion, etc. The height of the bottom beam exposed to the upper surface of the cushion layer is not greater than the depth of the depression of the overlapped staggered platform.

3) To hoist the cable pipes, first perform horizontal assembly, the two ends of the first cable pipe 16 and the second cable pipe 17 are overlapped by the wrong platform 3 and snapped into the bottom beam 10 of the U-shaped clamping pillow 8 of the joint, and the overlap is wrongly connected. The edge of platform 3 is aligned with the edge of the card pillow, and at the same time, paste waterproof material or fill foam block 18 at the vertical seam formed between the horizontally assembled pipes; (Inside the U-shaped clamping pillow) paste the sealing strip 19, and reserve a length that can surround the cross-section of the annular hoop after splicing; then perform longitudinal assembly in the same way to ensure that the next section of the cable pipe is lapped and wrongly connected 3 The edge is aligned with the edge of the card pillow; finally, the reserved sealing rubber strip 19 is tightly attached to the chamfered seam 21 on the end face of the seam of the overlapped staggered table 3 .

4) Install the joint clamping plate 12 and compact it, fasten the joint clamping plate 12 and the U-shaped clamping pillow as a whole with fastening bolts 15 to form a closed ring-shaped sleeve, fix the position of the joint and prefabricate the position of the pipe, and use The cement mortar 20 smoothes the bolt mounting holes 13 and the lifting point holes, and the installation and construction of a joint is completed so far.

By adopting the cable pipe arrangement of the present invention, it is possible to achieve rapid construction effects such as road closure and slotting in the evening, construction in the evening, soil sealing in the early morning, and passage in the daytime. It has the characteristics of high construction efficiency, simple structure, wide application range, reliable laying and connection, economical and environmental protection, etc. .

Claims (10)

1. A cable pipe arrangement, characterized in that it comprises a pipe body, a cable duct and a joint U-shaped clamping pillow, the cable duct runs through the interior of the pipe body, and the end face of the pipe body is provided with a protruding lap joint; The overlapping staggered table is placed in the U-shaped clamping pillow of the joint. 2 . The cable pipe arrangement according to claim 1 , wherein the cable pipe arrangement further comprises a joint clip, and the joint clip is connected with a joint U-shaped clamp to form an annular hoop. 3 . 3 . The cable pipe arrangement according to claim 2 , wherein the joint clamping plate and the joint U-shaped clamping pillow are fixedly connected by bolts. 4 . 4. The cable conduit according to any one of claims 1 to 3, wherein a lifting device is pre-embedded on the cable conduit. 5. The cable duct according to any one of claims 1 to 3, characterized in that, the ports of the overlapping staggered platforms are chamfered. 6 . The cable duct according to claim 5 , wherein, after the adjacent lap joints are butt-jointed, a sealing strip is placed in the chamfered joints formed by the ports. 7 . 7. The cable duct according to any one of claims 1 to 3, characterized in that the port of the cable duct is set as a circular arc chamfer or an enlarged diameter bell mouth. 8. The cable duct according to any one of claims 1 to 3, wherein the length of the protruding end surface of the overlapped staggered platform is 200mm-400mm. 9. A cable duct according to any one of claims 1 to 3, characterized in that, the cable ducts are arranged in a matrix, arranged in rows and columns: 1×N, 2×N or 3 ×N, where N=2, 3 and 4. 10. A construction method for cable piping, characterized in that the specific steps are as follows: 1) Excavate the foundation trench, lay the cushion and level it; 2) Lay the U-shaped pillow of the joint, and bury the bottom beam of the U-shaped pillow of the joint in the cushion; 3) Hoist the cable pipes, put the overlapping joints of the pipes into the U-shaped clamping pillow of the joint, and ensure that the edges of the overlapping joints are aligned with the edges of the clamping pillows; according to the needs, carry out horizontal assembly of the cable pipes, And ensure that the overlapping staggered table is aligned in the lateral direction; 4) After the horizontal assembly is completed, paste a sealing strip at the chamfering position at the port of the overlapping staggered platform, and reserve a certain length of the sealing strip; 5) Assemble the cable pipes longitudinally along the axial direction of the cable pipes, put the overlapping joints of the pipes into the U-shaped clamping pillow of the joint and connect them with the overlapping joints of the horizontally assembled cable pipes. The edge of the staggered table is aligned with the edge of the card pillow; after the longitudinal assembly is completed, the reserved sealing strip is tightly attached to the chamfered seam formed by the butt joint of the two rows of pipes; 6) Install the joint clamping plate on the top of the joint U-shaped clamping pillow and compact it, and use bolts to fasten the joint clamping plate and the joint U-shaped clamping pillow as one; 7) Steps 4), 5) and 6) are repeated until the construction of a section is completed; finally, the foundation trench is backfilled, and the construction ends.