CN211548122U - Cable trench expansion joint structure - Google Patents
Cable trench expansion joint structure Download PDFInfo
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- CN211548122U CN211548122U CN201921969051.XU CN201921969051U CN211548122U CN 211548122 U CN211548122 U CN 211548122U CN 201921969051 U CN201921969051 U CN 201921969051U CN 211548122 U CN211548122 U CN 211548122U
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Abstract
The utility model discloses a cable pit expansion joint structure, this cable pit expansion joint structure are prefabricated construction, including elasticity shaped steel, elasticity shaped steel is mouthful style of calligraphy, elasticity shaped steel's cross sectional shape is a plurality of V style of calligraphy combinations, is fixed with a plurality of overlap joint reinforcing bars along the both sides of elasticity shaped steel axis, and the waterstop is all being fixed along elasticity shaped steel sideline in the both sides of elasticity shaped steel axis, the waterstop is ㄩ type. The utility model discloses both satisfied concrete structure expend with heat and contract with cold's flexible space requirement, guaranteed the continuity of cable pit expansion joint both sides cable pit structure again, improved the rigidity of cable pit expansion joint structure to prevent that both sides cable pit structure from subsiding or the inside cable conductor of cable pit structure that the side shifted and leads to because of the difference is tensile or drop, just the utility model discloses can adopt assembled and standardized construction, guaranteed the construction quality and the progress of cable pit expansion joint structure.
Description
Technical Field
The utility model relates to an electric power construction field especially relates to a cable pit expansion joint structure and construction method thereof.
Background
As the demand of urban power supply is increasing, high-grade voltage lines begin to enter central areas of cities and gradually change from aerial erection to underground laying, and cable trenches are one of the most common structures for laying cable lines, so that the cable trenches are widely used for laying high-voltage cables in cities due to a series of advantages of simple civil engineering construction, low manufacturing cost, wider width compared with small-diameter cable tunnels and cable ducts and the like.
However, with the process of urbanization, a large amount of external operations such as engineering construction and the like endanger buried high-voltage cable lines, and the problem is more prominent particularly in soft soil areas along the coastal areas of the bead triangle. The foundation soil subsides in a 220KV high-voltage cable trench of the Zhuhai, so that uneven settlement occurs at the expansion joint structure of the cable trench, the expansion joint structure is expanded, and potential safety hazards such as water seepage and cable falling occur.
The root of the potential safety hazards of the cable ditches is that the traditional cable ditch expansion joint structure is a concrete structure expansion joint which is arranged according to the concrete structure construction specification and requirements, and the joint is only plugged by filling materials such as asphalt hemp and the like so as to realize the waterproof requirement of the contraction joint structure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cable pit expansion joint structure to prior art's not enough, both guaranteed concrete structure expend with heat and contract with cold's flexible space, improved cable pit expansion joint structure rigidity and biography force characteristic again.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a cable pit expansion joint structure, its characterized in that includes elasticity shaped steel, elasticity shaped steel is mouthful style of calligraphy, the cross sectional shape of elasticity shaped steel is a plurality of V style of calligraphy combinations, is fixed with a plurality of overlap joint reinforcing bars along the both sides of elasticity shaped steel axis, and the waterstop is all being fixed along elasticity shaped steel sideline to the both sides of elasticity shaped steel axis, the waterstop is ㄩ type. The square elastic section steel is used for creating an elastic space for the expansion deformation of the concrete structure caused by thermal expansion and cold contraction, and the U-shaped water stop belt is used for improving the waterproof performance of the contact interface between the elastic section steel and the cable trench concrete; the lap joint reinforcing steel bars are used for connecting the cable trench expansion joint structures with the cable trench structures on the two sides, so that the structural continuity of the cable trench expansion joint structures and the cable trenches on the two sides is guaranteed, the internal force transmission and the coordinated deformation of the cable trench structures on the two sides are further realized, and a series of potential safety hazards of a power grid caused by the expansion problem of the cable trench expansion joint structures are avoided.
Furthermore, the section of the elastic section steel is M-shaped and is combined into two V-shaped sections. The thickness of the elastic profile steel is about 3mm, the specific section size and the thickness are determined according to the size of the cable trench structure, and the purpose is to ensure the elastic space required by longitudinal expansion and contraction deformation of the cable trench structure and ensure the transverse structural rigidity and the force transmission characteristic of the expansion joint structure.
Further, in order to ensure the waterproof and anti-permeability performance of the expansion joint structure, the water stop is a rubber water stop. Furthermore, the width of the water stop is more than or equal to 200mm, and the thickness of the water stop is more than or equal to 5 mm. In addition, in the process of positioning the water stop and concreting, attention should be paid to the positioning method and the pressure of concreting so as to prevent the water stop from being punctured and affecting the waterproof and anti-permeability performance of the expansion joint structure.
Further, in order to guarantee the connection and the internal force transmission effect of cable pit structure and expansion joint structure, the overlap joint reinforcing bar is U type reinforcing bar. The overlap joint reinforcing bar only sets up on three edges of elasticity shaped steel every side, does not set up in last side, and the overlap joint reinforcing bar is ㄩ types on the whole. Furthermore, the length of the lapped reinforcing steel bars in the direction of the axis of the square elastic profile steel is more than or equal to 200mm, which is determined according to actual conditions, and the grade and the nominal diameter of the selected reinforcing steel bars are not less than the minimum grade and the nominal diameter of the reinforcing steel bars used in the cable trench structure, so that the lapped reinforcing steel bars are prevented from yielding too early and exiting from working, and further the internal force transmission and the cooperative deformation of the cable trench structures at two sides of the cable trench expansion joint structure are influenced.
A construction method of a cable trench expansion joint is characterized by comprising the following specific steps:
1) excavating a foundation trench, laying a cushion layer and leveling;
2) hoisting the constructed cable trench reinforcement cage into a foundation trench and positioning;
3) hoisting the cable trench expansion joint structure into the foundation trench and positioning, and welding the cable trench reinforcement cage and the cable trench expansion joint structure together through the lapped reinforcement;
4) and (4) supporting a template, pouring and molding the main structure of the cable trench, and maintaining the main structure of the cable trench to a standard value of the compressive strength of concrete.
Compared with the prior art, the utility model discloses have as follows and show the effect:
(1) the utility model provides the high continuity of cable pit expansion joint structure both sides cable pit structure has improved the rigidity and the power transmission characteristic of cable pit expansion joint structure to it subsides or the inside cable conductor of cable pit structure that the side moved and leads to because of the difference to have reduced both sides cable pit structure, and then has avoided producing the influence to the operation safety of electric wire netting, has improved the reliability and the security of electric wire netting construction and operation.
(2) The utility model discloses a prefabricated construction can the modularization production, and the modularization is assembled, and the construction process tradition is simple simultaneously, and is swift high-efficient, can realize quick installation, saves the time limit for a project by a wide margin.
(3) The utility model discloses a standardized assembled structure, traditional cable pit expansion joint structure construction relatively, the standardized enhancement of cable pit expansion joint structure construction and acceptance test has further improved the construction quality of cable pit expansion joint structure.
(4) The utility model discloses in set up the waterstop at both ends, effectively improve the waterproof performance at elasticity shaped steel and cable pit concrete contact interface, and then reduce the safety problem of a series of crisis electric wire netting such as the inside ponding of similar cable pit.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a three-dimensional view of a cable trench expansion joint structure in a cable trench structure according to an embodiment of the present invention;
FIG. 2 is a three-dimensional view of the cable trench expansion joint structure and the cable trench structure disassembled in the embodiment of the present invention;
FIG. 3 is a three-dimensional view of the cable trench expansion joint structure and the steel bar lapping inside the cable trench structure in the embodiment of the present invention;
FIG. 4 is a three-dimensional view of the cable trench expansion joint structure and the reinforcement bar inside the cable trench structure in the embodiment of the present invention;
FIG. 5 is a three-dimensional view of the expansion joint structure of the cable trench according to the embodiment of the present invention;
FIG. 6 is a three-dimensional view of the disassembled expansion joint structure of the cable trench according to the embodiment of the present invention;
FIG. 7 is a three-dimensional view of an elastic steel section according to an example of the present invention;
FIG. 8 is a three-dimensional view of the installation of the cable trench expansion joint structure and the cable trench structure in the embodiment of the present invention;
in the figure: the cable trench comprises 1 elastic profile steel, 11 water stop belts, 12 lap joint reinforcing steel bars, 2 cable trench structures, 21 cable trench structure internal reinforcing steel bars, 22 cable supports and 3 cable trench cover plates.
Detailed Description
As shown in fig. 1-2, be the utility model discloses cable pit expansion joint structural installation is at the schematic diagram of cable pit structure, and cable pit structure 2 is pour by the steel reinforcement cage back mould that the inside reinforcing bar 21 of cable pit structure built up and forms, then installs the cable support 22 of the 2 both sides side walls of cable pit structure again for it is spacing to put the cable conductor, covers prefabricated cable pit apron 3 again in 2 tops of cable pit structure at last, forms the airtight space structure of a protection cable conductor.
As shown in fig. 3~4, cable pit expansion joint structure both sides are equipped with a plurality of U type overlap joint reinforcing bar 12 that the interval is appropriate, and elastic section steel 1 of expansion joint structure just is connected with the inside reinforcing bar 21 of cable pit structure through this overlap joint reinforcing bar 12 in the work progress, and the waterstop 11 of the outer both sides of cable pit expansion joint structure also will cover the reinforcing bar of overlap joint department simultaneously, guarantees the waterproof impervious performance of elastic section steel 1 and the 2 contact interface of cable pit structure of cable pit expansion joint structure.
As shown in fig. 5 to 6, the cable trench expansion joint structure is composed of three parts, namely elastic section steel 1, a water stop belt 11 and an overlap reinforcement 12; wherein the elastic section steel 1 is a closed steel structure shaped like a Chinese character 'kou' to improve the transverse rigidity of the elastic section steel 1. Further, as shown in fig. 7, the elastic section steel 1 is a profiled steel having a cross-sectional thickness of 3mm and a W-shape or M-shape to secure an elastic space required for the longitudinal expansion and contraction deformation of the cable trench structure 2. Elastic section steel 1 can be prefabricated in advance in the mill according to the size of cable pit structure 2 and accomplish to lay the waterstop 11 of a U type along the outer sideline of elastic section steel 1 bottom and both sides, will utilize overlap joint reinforcing bar 12 with elastic section steel 1 and cable pit structure inside reinforcing bar 21 overlap joint together at the job site of cable pit structure 2 finally, accomplish the installation of cable pit expansion joint structure.
As shown in fig. 8, cable pit expansion joint structure belongs to half assembled prefabricated construction, can come the installation as required according to design and job site actual conditions the utility model discloses a construction process and operation flow are simplified greatly to cable pit expansion joint structure, and is nimble convenient, environmental suitability is strong.
To sum up, use the utility model discloses a construction process does: 1. firstly, two sections of 21 steel bars are constructed according to design drawings. 2. And respectively welding the U-shaped overlap joint reinforcing steel bar 12 with the two sections of 21 reinforcing steel bars. 3. The finished steel bar 12-steel bar 21 are welded on the two sides of the section steel through the internal U-shaped lap joint steel bar 12 to form the integral structure shown in figure 3.
The embodiment of the present invention is not limited to this, according to the above-mentioned contents of the present invention, according to the common techniques and conventional means in the field, without departing from the above-mentioned basic technical idea of the present invention, the elastic profile steel, the lap steel bar and the water stop used in the cable trench expansion joint structure of the present invention can also adopt other similar structural shapes; the section form, the appearance and the size of the elastic profile steel can be customized according to the actual situation on site, and the water stop belt has other types or sizes; the installation of the elastic profile steel and the cable trench structure and the lap joint of the water stop belt, the elastic profile steel and the reinforcing steel bar can also adopt other connection modes; the material and thickness of the elastic profile steel, the type and material of the water stop belt and the like have other embodiments; therefore, the present invention also has various modifications, replacements, or alterations, and all fall within the scope of the right protection of the present invention.
Claims (7)
1. The utility model provides a cable pit expansion joint structure, its characterized in that includes elasticity shaped steel, elasticity shaped steel is mouthful style of calligraphy, the cross sectional shape of elasticity shaped steel is a plurality of V style of calligraphy combinations, is fixed with a plurality of overlap joint reinforcing bars along the both sides of elasticity shaped steel axis, and the waterstop is all being fixed along elasticity shaped steel sideline to the both sides of elasticity shaped steel axis, the waterstop is ㄩ type.
2. The cable trench expansion joint structure of claim 1, wherein: the section of the elastic section steel is M-shaped and is combined into two V-shaped sections.
3. The cable trench expansion joint structure of claim 1, wherein: the water stop is a rubber water stop.
4. The cable trench expansion joint structure of claim 1, wherein: the width of the water stop is more than or equal to 200mm, and the thickness of the water stop is more than or equal to 5 mm.
5. The cable trench expansion joint structure of claim 1, wherein: the lap joint reinforcing steel bars are U-shaped reinforcing steel bars.
6. The cable trench expansion joint structure of claim 1, wherein: the length of the lap joint reinforcing steel bar in the direction of the axis of the elastic profile steel in the shape of the Chinese character kou is more than or equal to 200 mm.
7. The cable trench expansion joint structure of claim 1, wherein: the lap steel bars are only arranged on three edges of each side of the elastic section steel, and the lap steel bars are ㄩ -shaped integrally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921969051.XU CN211548122U (en) | 2019-11-13 | 2019-11-13 | Cable trench expansion joint structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921969051.XU CN211548122U (en) | 2019-11-13 | 2019-11-13 | Cable trench expansion joint structure |
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| CN211548122U true CN211548122U (en) | 2020-09-22 |
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| CN201921969051.XU Active CN211548122U (en) | 2019-11-13 | 2019-11-13 | Cable trench expansion joint structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820965A (en) * | 2019-11-13 | 2020-02-21 | 华南理工大学 | Cable trench expansion joint structure and construction method thereof |
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2019
- 2019-11-13 CN CN201921969051.XU patent/CN211548122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820965A (en) * | 2019-11-13 | 2020-02-21 | 华南理工大学 | Cable trench expansion joint structure and construction method thereof |
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