Weak current cable duct laying structure

Abstract

The utility model provides a weak-current cable duct laying structure. The weak-current cable duct laying structure comprises a duct package, a backfill layer, a pavement structure layer and a roadway surface layer which are sequentially arranged from bottom to top, the calandria package comprises a concrete package and cable calandrias, wherein the cable calandrias are uniformly embedded in the concrete package in an array manner along the width and height directions; the thickness of the backfill layer is larger than that of the calandria package; the thickness of the pavement structure layer is smaller than that of the backfill layer; the concrete encapsulation adopts C20 concrete, the backfill layer is paved by adopting an original pavement milling material, and the pavement structure layer is paved by adopting C25 concrete. The utility model has the advantages of simple and reasonable structure, strong integrality, improved structural strength and stability and simple construction, and reduces the emission of construction wastes, reduces the pollution and protects the environment by using the original pavement milling material for the construction of the backfill layer; the maintainability of the structure is improved, rainwater is prevented from being injected, damage is reduced, potential safety hazards are reduced, the process is simplified, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering construction, in particular to a weak-current cable pipe laying structure. Background Art

[0002] At present, there are four main ways to lay cables: direct burial, pipe laying, cable trench laying, and pipe laying. Scientific and reasonable laying methods can not only ensure the smooth and safe transmission of cables, but also effectively utilize the space and resources of the entire city to avoid waste.

[0003] Among them, the requirements for direct burial cable laying technology are relatively low, the construction process is simple, the cost investment is low, and the land space occupied is small. However, some sections have a large number of outgoing lines and complex terrain conditions, making it difficult to repair trenches. In such sections, pipe laying becomes an important choice, especially in some sections with crowded underground corridors and heavy traffic. Pipe laying can not only meet the demand for the number of cables in these sections, but also save space and economy, which has obvious advantages.

[0004] Cable conduit laying is suitable for urban roads with dense underground pipelines or road passages that are difficult to dig; areas where urban sidewalk construction is inconvenient and cables are laid in stages; planned or newly built road sections; areas that are easily damaged by external forces; intersections of cables and highways; and areas where urban roads are narrow and traffic is busy.

[0005] Cable conduit laying first requires the construction of good underground conduits, and then the cables are laid in the conduits. Compared with other laying methods, it has obvious advantages and can well solve the legacy problems of direct burial laying. Compared with cable trench laying, it requires less land space and financial support.

[0006] However, the current cable conduit laying structure is easily subjected to external pressure and other effects during its later use, which can easily cause the overall structure to sink. When encountering rainy and snowy weather, rainwater will flow into the structure and easily damage the cable conduits, making cable short circuits and burning very likely to occur, which directly increases maintenance costs and poses a great risk of safety accidents. Utility Model Content

[0007] In view of this, the purpose of the utility model is to design a low-voltage cable conduit laying structure, improve the strength and stability of the overall structure, reduce the occurrence of damage, enhance maintainability, reduce potential safety hazards, simplify the process, and use original road milling materials for well bottom structure construction to reduce construction waste emissions and reduce costs.

[0008] The utility model provides a weak current cable pipe laying structure, which is suitable for use under a roadway, and includes: a pipe encapsulation, a backfill layer, a pavement structure layer, and a roadway surface layer arranged in sequence from bottom to top; the pipe encapsulation includes: a concrete encapsulation and a cable pipe, and the cable pipe is evenly embedded in the concrete encapsulation in an array along the width and height directions;

[0009] The thickness of the backfill layer is greater than the thickness of the pipe packaging, and the thickness of the pavement structure layer is less than the thickness of the backfill layer, thereby improving the overall structural strength and stability.

[0010] The concrete encapsulation adopts C20 concrete, and the backfill layer is paved with the original road milling material;

[0011] The original road milling material is an asphalt gravel mixture scraped off the original damaged asphalt sand road surface with a milling machine; the original road milling material is used as the backfill material of the original road surface, which improves the structural strength and reduces the emission of construction waste, saves costs, reduces pollution and protects the environment.

[0012] At the same time, the original road milling material replaces the traditional backfill soil, which can better prevent rainwater from entering.

[0013] The pavement structure layer is paved with C25 concrete.

[0014] Furthermore, the cable conduit is a double-wall corrugated tube with an outer diameter of Φ110 mm.

[0015] Double-wall corrugated pipe is a new type of pipe with an annular outer wall and a smooth inner wall. The promotion and application of HDPE double-wall corrugated pipe is in an upward trend, and all technical indicators have reached the use standard. High-density polyethylene (HDPE) has excellent chemical stability, aging resistance and environmental stress cracking resistance. The main properties of HDPE double-wall corrugated pipe produced from HDPE as raw material are as follows:

[0016] 1. Strong ability to resist external pressure:

[0017] The outer wall has an annular corrugated structure, which greatly enhances the ring stiffness of the pipe, thereby enhancing the pipe's resistance to soil load. In this performance, HDPE double-wall corrugated pipe has obvious advantages compared with other pipes.

[0018] 2. Low project cost:

[0019] Under the same load conditions, HDPE double-wall corrugated pipes only need thinner walls to meet the requirements. Therefore, compared with solid wall pipes of the same material specifications, it can save about half of the raw materials, so the cost of HDPE double-wall corrugated pipes is also lower. This is another outstanding feature of this pipe.

[0020] 3. Convenient construction:

[0021] Because HDPE double-wall corrugated pipe is light in weight, easy to carry and connect, it is quick to construct and simple to maintain. The advantages are more obvious when the construction period is tight and the construction conditions are poor.

[0022] 4. Small friction coefficient and large flow rate:

[0023] HDPE double-wall corrugated pipes made of HDPE can pass a larger flow rate than other pipes of the same diameter. Under the same flow requirements, HDPE double-wall corrugated pipes with relatively smaller diameters can be used.

[0024] 5. Low temperature resistance and impact resistance:

[0025] The brittle temperature of HDPE double-wall corrugated pipe is -70℃. No special protective measures are required during construction under normal low temperature conditions (above -30℃), which makes construction convenient in winter. In addition, HDPE double-wall corrugated pipe has good impact resistance.

[0026] 6. Good chemical stability:

[0027] Since HDPE molecules have no polarity, they have excellent chemical stability. Except for a few strong oxidants, most chemical media will not damage them. The soil, electricity, acid and alkali factors in the general use environment will not damage the pipe, will not breed bacteria, will not scale, and its flow area will not decrease with the increase of operating time.

[0028] 7. Long service life:

[0029] Under the condition of not being exposed to sunlight ultraviolet rays, the service life of HDPE double-wall corrugated pipe can reach more than 50 years.

[0030] 8. Excellent wear resistance:

[0031] Tests have shown that the wear resistance of HDPE is even several times higher than that of steel pipes.

[0032] 9. Appropriate deflection:

[0033] A certain length of HDPE double-wall corrugated pipe can be slightly bent axially and is not affected by a certain degree of uneven settlement of the ground. It can be laid directly in a slightly crooked groove without pipe fittings.

[0034] Furthermore, the sum of the thickness of the pavement structure layer and the backfill layer is greater than 700 mm, which plays a role in reinforcing the structural strength of the pipe laying.

[0035] Furthermore, the distance between the outer diameter of the cable conduit closest to the upper part of the concrete encapsulation and the upper surface of the concrete encapsulation is 80-85 mm.

[0036] Furthermore, the distance between the outer diameter of the cable conduit closest to the lower part of the concrete encapsulation and the lower surface of the concrete encapsulation is 80-85 mm.

[0037] Furthermore, the distance between the outer diameter of the cable conduit closest to the side of the concrete encapsulation and the side surface of the concrete encapsulation is 80-85 mm.

[0038] Furthermore, the number of holes of the cable conduit is one of 9 holes and 4 holes.

[0039] Furthermore, the slopes on both sides of the pavement structure layer and the backfill layer are both 1:0.5.

[0040] Furthermore, the radial spacing between each cable tube is 19-21 mm.

[0041] Compared with the prior art, the utility model has the following beneficial effects on the culvert structure for reinforcing the roadbed bottom:

[0042] The utility model has a simple and reasonable structure for laying low-voltage cable conduits, strong integrity, improved strength and stability of the cable conduit laying structure, simple construction, and uses original road milling materials for backfill layer construction, which reduces construction waste emissions, reduces pollution, and protects the environment; it improves the maintainability of the cable conduit laying structure, prevents rainwater from entering, reduces the occurrence of damages, reduces safety hazards, simplifies the process, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 It is a cross-sectional schematic diagram of a 9-hole weak-current cable conduit laying structure according to an embodiment of the utility model;

[0045] Figure 2 It is a cross-sectional schematic diagram of a 4-hole weak-current cable conduit laying structure according to an embodiment of the utility model.

[0046] The symbols in the accompanying drawings are:

[0047] 1. Pipe packaging, 2. Backfill layer, 3. Pavement structure layer, 4. Driveway surface layer, 5. Cable pipe. DETAILED DESCRIPTION

[0048] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0052] The utility model embodiment provides a weak current cable pipe laying structure, see Figure 1 , 2 As shown, it includes: a pipe package 1, a backfill layer 2, a pavement structure layer 3, and a road surface layer 4 arranged in sequence from bottom to top; the pipe package 1 includes: a concrete package, a cable pipe 5, and the cable pipe 5 is evenly arranged in an array along the width and height directions and embedded inside the concrete package;

[0053] The thickness of the backfill layer 2 is greater than the thickness of the pipe packaging 1 , and the thickness of the pavement structure layer 3 is less than the thickness of the backfill layer 2 , thereby improving the overall structural strength and stability.

[0054] The concrete encapsulation adopts C20 concrete, and the backfill layer 2 is paved with the original road milling material; the original road milling material is the asphalt gravel mixture scraped off the original damaged asphalt sand road surface by a milling machine; the original road milling material is used as the material of the original road surface to backfill and serve as the backfill layer material, which improves the structural strength, reduces the emission of construction waste, saves costs, reduces pollution, and protects the environment. At the same time, the original road milling material replaces the traditional backfill soil, which can better prevent rainwater from entering.

[0055] The pavement structure layer 3 is paved with C25 concrete.

[0056] The cable conduit 5 is a double-wall corrugated tube with an outer diameter of Φ110 mm.

[0057] Double-wall corrugated pipe is a new type of pipe with an annular outer wall and a smooth inner wall. The promotion and application of HDPE double-wall corrugated pipe is in an upward trend, and all technical indicators have reached the use standard. High-density polyethylene (HDPE) has excellent chemical stability, aging resistance and environmental stress cracking resistance. The main properties of HDPE double-wall corrugated pipe produced from HDPE as raw material are as follows:

[0058] 1. Strong ability to resist external pressure:

[0059] The outer wall has an annular corrugated structure, which greatly enhances the ring stiffness of the pipe, thereby enhancing the pipe's resistance to soil load. In this performance, HDPE double-wall corrugated pipe has obvious advantages compared with other pipes.

[0060] 2. Low project cost:

[0061] Under the same load conditions, HDPE double-wall corrugated pipes only need thinner walls to meet the requirements. Therefore, compared with solid wall pipes of the same material specifications, it can save about half of the raw materials, so the cost of HDPE double-wall corrugated pipes is also lower. This is another outstanding feature of this pipe.

[0062] 3. Convenient construction:

[0063] Because HDPE double-wall corrugated pipe is light in weight, easy to carry and connect, it is quick to construct and simple to maintain. The advantages are more obvious when the construction period is tight and the construction conditions are poor.

[0064] 4. Small friction coefficient and large flow rate:

[0065] HDPE double-wall corrugated pipes made of HDPE can pass a larger flow rate than other pipes of the same diameter. Under the same flow requirements, HDPE double-wall corrugated pipes with relatively smaller diameters can be used.

[0066] 5. Low temperature resistance and impact resistance:

[0067] The brittle temperature of HDPE double-wall corrugated pipe is -70℃. No special protective measures are required during construction under normal low temperature conditions (above -30℃), which makes construction convenient in winter. In addition, HDPE double-wall corrugated pipe has good impact resistance.

[0068] 6. Good chemical stability:

[0069] Since HDPE molecules have no polarity, they have excellent chemical stability. Except for a few strong oxidants, most chemical media will not damage them. The soil, electricity, acid and alkali factors in the general use environment will not damage the pipe, will not breed bacteria, will not scale, and its flow area will not decrease with the increase of operating time.

[0070] 7. Long service life:

[0071] Under the condition of not being exposed to sunlight ultraviolet rays, the service life of HDPE double-wall corrugated pipe can reach more than 50 years.

[0072] 8. Excellent wear resistance:

[0073] Tests have shown that the wear resistance of HDPE is even several times higher than that of steel pipes.

[0074] 9. Appropriate deflection:

[0075] A certain length of HDPE double-wall corrugated pipe can be slightly bent axially and is not affected by a certain degree of uneven settlement of the ground. It can be laid directly in a slightly crooked groove without pipe fittings.

[0076] The sum of the thickness of the pavement structure layer 3 and the backfill layer 2 is greater than 700 mm, which serves to strengthen the structural strength of the pipe laying.

[0077] The distance between the outer diameter of the cable conduit closest to the upper part of the concrete encapsulation and the upper surface of the concrete encapsulation is 80 mm.

[0078] The distance between the outer diameter of the cable conduit 5 closest to the lower part of the concrete encapsulation and the lower surface of the concrete encapsulation is 80 mm.

[0079] The distance between the outer diameter of the cable conduit 5 closest to the side of the concrete encapsulation and the side surface of the concrete encapsulation is 80 mm.

[0080] A preferred embodiment of the present invention sets the number of holes of the cable conduit 5 to be 9 (see Figure 1 shown).

[0081] Another preferred embodiment of the present invention sets the number of holes of the cable conduit 5 to be 4 holes (see Figure 2 shown).

[0082] In this embodiment, the radial spacing between each cable tube 5 is 20 mm.

[0083] The slopes on both sides of the pavement structure layer and the backfill layer are both 1:0.5.

[0084] The low-voltage cable conduit laying structure provided by the embodiment of the utility model is simple and reasonable, with strong integrity, improved strength and stability of the cable conduit laying structure, simple construction, and the use of original road milling materials for backfill layer construction, which reduces construction waste emissions, reduces pollution, and protects the environment; improves the maintainability of the cable conduit laying structure, prevents rainwater from entering, reduces the occurrence of damage, reduces safety hazards, simplifies the process, and reduces costs.

[0085] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

[0086] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A weak current cable pipe laying structure, characterized in that: Applicable to the bottom of the roadway, including: pipe packaging, backfill layer, pavement structure layer, and roadway surface layer arranged in sequence from bottom to top; the pipe packaging includes: concrete encapsulation and cable pipes, and the cable pipes are evenly embedded in the concrete encapsulation in an array along the width and height directions; The thickness of the backfill layer is greater than the thickness of the pipe packaging; the thickness of the pavement structure layer is less than the thickness of the backfill layer; The concrete encapsulation adopts C20 concrete, the backfill layer is paved with original road surface milling material, and the road surface structure layer is paved with C25 concrete.

2. The weak-current cable pipe laying structure according to claim 1 is characterized in that: The cable conduit is a double-wall corrugated tube with an outer diameter of Φ110mm.

3. The weak-current cable pipe laying structure according to claim 1 is characterized in that: The sum of the thickness of the pavement structure layer and the backfill layer is greater than 700 mm.

4. The weak-current cable pipe laying structure according to claim 1 is characterized in that: The distance between the outer diameter of the cable conduit closest to the upper part of the concrete encapsulation and the upper surface of the concrete encapsulation is 80-85 mm.

5. The weak-current cable pipe laying structure according to claim 1 is characterized in that: The distance between the outer diameter of the cable conduit closest to the lower part of the concrete encapsulation and the lower surface of the concrete encapsulation is 80-85 mm.

6. The weak-current cable pipe laying structure according to claim 1 is characterized in that: The distance between the outer diameter of the cable conduit closest to the side of the concrete encapsulation and the side surface of the concrete encapsulation is 80-85 mm.

7. The weak-current cable pipe laying structure according to claim 1 is characterized in that: The number of holes of the cable conduit is one of 9 holes and 4 holes.

8. The low-voltage cable pipe laying structure according to claim 1 is characterized in that: The slopes on both sides of the pavement structure layer and the backfill layer are both 1:0.

5.

9. The weak-current cable pipe laying structure according to claim 1, characterized in that: The radial spacing between each cable duct is 19-21mm.

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