Self-drainage cable trench cover plate optimization method and cable trench cover plate

Abstract

The invention belongs to the technical field of cable trench cover plates, and provides a self-drainage cable trench cover plate optimization method and a cable trench cover plate, and the two ends of a cable trench cover plate body are respectively provided with a bottom end splicing head and a top end splicing head; a splicing insertion block is vertically arranged on the splicing head at the bottom end, and a splicing cavity located between the splicing insertion block and the cable trench cover plate body is obtained; a drainage ditch with a slope is formed in the position, located in the splicing cavity, of the splicing head at the bottom end; splicing insertion grooves matched with the splicing insertion blocks are formed between the top end splicing head and the cable trench cover plate body. Through the cooperation of the splicing insertion blocks and the splicing insertion grooves on the adjacent cable trench cover plates, the connection of the adjacent cable trench cover plates is realized, and the disassembly and maintenance are convenient. And meanwhile, the slope drainage ditches are arranged, when rainwater enters the splicing cavities, the rainwater can be drained in time, the slope drainage ditches are arranged to be in an arc shape, the radius of the slope drainage ditches is set according to the rainfall conditions of different areas, and the purpose of automatically flushing sludge during drainage can be achieved on the basis that the stability is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable trench covers, and in particular relates to a self-draining cable trench cover optimization method and a cable trench cover. Background Art

[0002] With the continuous upgrading of science and technology industries, electricity consumption is increasing every year, and the structure of power plants is also being optimized. The optimized structure also has obvious defects. For example, the cable trench cover of the power plant was prefabricated concrete cover before optimization. This cover has stable structural performance and is not prone to cracking. After the construction is completed, the construction joint needs to be sealed with mortar. The cable trench is not prone to water ingress on rainy days, but it is difficult to repair and the cover needs to be re-sealed after lifting.

[0003] After optimization, high-strength inorganic finished cover plates are used for general sections. This type of cover plate is light in weight and convenient for maintenance, but the construction joints are obvious after laying. The cable trench is prone to water ingress after heavy rain, which may cause major safety hazards such as leakage. In addition, as rainwater enters the cable trench, silt will also enter the cable trench, causing problems with the cleaning of the cable trench. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a self-draining cable trench cover optimization method and a cable trench cover, which realizes the connection of adjacent cable trench covers through the cooperation of splicing blocks and splicing slots on adjacent cable trench covers, and is convenient for disassembly and maintenance; at the same time, a sloped drainage ditch is set at the position of the splicing cavity, and when rainwater enters the splicing cavity, it can be discharged in time, and the sloped drainage ditch is set in an arc shape, and its radius is set according to the rainfall conditions in different areas. By determining the arc radius, the purpose of automatic flushing of silt during drainage can be met on the basis of ensuring stability.

[0005] In order to achieve the above objectives, in a first aspect, the present invention provides a method for optimizing a self-draining cable trench cover, which adopts the following technical solution:

[0006] A method for optimizing a self-draining cable trench cover, comprising:

[0007] A bottom splicing joint and a top splicing joint are respectively arranged at both ends of the cable trench cover body;

[0008] A splicing plug is vertically arranged on the bottom splicing joint to a splicing cavity between the splicing plug and the cable trench cover body; a sloped drainage ditch is arranged on the bottom splicing joint at the position of the splicing cavity; a splicing slot matching the splicing plug is arranged between the top splicing joint and the cable trench cover body;

[0009] The sloped drainage ditch is arranged in an arc shape, and its radius is set according to the rainfall conditions in different areas.

[0010] Furthermore, the uppermost end of the splicing block is higher than the top plane of the cable trench cover body, and the inner bottom end surface of the splicing slot is higher than the top plane of the cable trench cover body.

[0011] Furthermore, the sloped drainage ditch is a sloped structure that inclines from the middle to both ends.

[0012] Furthermore, when the actual rainfall in the area increases, the arc radius of the sloped drainage ditch is increased within a preset range; when the actual rainfall in the area decreases, the arc radius of the sloped drainage ditch is reduced.

[0013] Furthermore, the arc radius of the drainage strip is:

[0014]

[0015] Wherein, k is an adjustment parameter, and the arc radius of the sloped drainage ditch is changed by adjusting the k value. The relationship between the k value and the rainfall is obtained by fitting.

[0016] In order to achieve the above object, in a second aspect, the present invention further provides a cable trench cover, which adopts the following technical solution:

[0017] A cable trench cover comprises a cable trench cover body, and a bottom splicing joint and a top splicing joint arranged at two ends of the cable trench cover body;

[0018] A splicing plug is vertically arranged on the bottom splicing joint, and a splicing cavity is arranged between the splicing plug and the cable trench cover body; a sloped drainage ditch is arranged on the bottom splicing joint at the position of the splicing cavity; a splicing slot matching the splicing plug is arranged between the top splicing joint and the cable trench cover body;

[0019] The sloped drainage ditch is arranged in an arc shape, and its radius is set according to the rainfall conditions in different areas.

[0020] Furthermore, the uppermost end of the splicing block is higher than the top plane of the cable trench cover body, and the inner bottom end surface of the splicing slot is higher than the top plane of the cable trench cover body.

[0021] Furthermore, the sloped drainage ditch is a sloped structure that inclines from the middle to both ends.

[0022] Furthermore, when the actual rainfall in the area increases, the arc radius of the sloped drainage ditch is increased within a preset range; when the actual rainfall in the area decreases, the arc radius of the sloped drainage ditch is reduced.

[0023] Furthermore, the arc radius of the drainage strip is:

[0024]

[0025] Wherein, k is an adjustment parameter, and the arc radius of the sloped drainage ditch is changed by adjusting the k value. The relationship between the k value and the rainfall is obtained by fitting.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention respectively arranges a bottom splicing joint and a top splicing joint at both ends of the cable trench cover body; wherein, a splicing plug is vertically arranged on the bottom splicing joint to obtain a splicing cavity located between the splicing plug and the cable trench cover body; a sloped drainage ditch is arranged on the bottom splicing joint at the position of the splicing cavity; a splicing slot matched with the splicing plug is arranged between the top splicing joint and the cable trench cover body; the connection of adjacent cable trench covers is achieved through the cooperation of the splicing plug and the splicing slot on adjacent cable trench covers, and disassembly and maintenance are convenient; at the same time, a sloped drainage ditch is arranged at the position of the splicing cavity, when rainwater enters the splicing cavity, it can be discharged in time, and the sloped drainage ditch is arranged in an arc shape, and its radius is set according to the rainfall conditions in different areas. By determining the arc radius, the purpose of automatically flushing silt during drainage can be met on the basis of ensuring stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0029] Figure 1 It is a schematic diagram of the structure of the cable trench cover of the present invention;

[0030] Figure 2 This is a schematic diagram of the sloped drainage ditch structure of the present invention;

[0031] Figure 3 This is a schematic diagram of two cable trench covers of the present invention before being spliced;

[0032] Figure 4 It is a schematic diagram of the limit stress to the critical failure point when the ratio of the thickness and width of the cover plate of the present invention is 0.01;

[0033] Figure 5 It is a schematic diagram of the limit stress to the critical failure point when the ratio of the thickness and width of the cover plate of the present invention is 0.0125;

[0034] Figure 6 It is a schematic diagram of the limit stress to the critical failure point when the ratio of the thickness and width of the cover plate of the present invention is 0.016;

[0035] Figure 7It is a schematic diagram of the limit stress to the critical failure point when the ratio of the thickness and width of the cover plate of the present invention is 0.02;

[0036] Among them, 1. Cable trench cover body; 101. Bottom splicing joint; 102. Splicing plug; 103. Splicing cavity; 104. Top plane; 105. Top splicing joint; 106. Splicing slot; 107. Bottom plane; 108. Sloped drainage ditch. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0039] Embodiment 1:

[0040] like Figure 1 As shown, this embodiment provides a method for optimizing a self-draining cable trench cover, wherein a bottom splicing joint 101 and a top splicing joint 105 are respectively provided at both ends of a cable trench cover body 1; wherein a splicing plug 102 is vertically provided on the bottom splicing joint 101 to obtain a splicing cavity 103 located between the splicing plug 102 and the cable trench cover body 1; a sloped drainage ditch 108 is provided on the bottom splicing joint 101 at the position of the splicing cavity 103; and a splicing plug 102 is provided between the top splicing joint 105 and the cable trench cover body 1 to cooperate with the splicing plug 102. Splicing slot 106; through the cooperation of the splicing plug 102 and the splicing slot 106 on the adjacent cable trench cover plates, the connection of adjacent cable trench covers is realized, and disassembly and maintenance are convenient; at the same time, a sloped drainage ditch 108 is set at the position of the splicing cavity 103, when rainwater enters the splicing cavity 103, it can be discharged in time, and the sloped drainage ditch 108 is set to an arc shape, and its radius is set according to the rainfall conditions in different areas. By determining the arc radius, the purpose of automatic flushing of silt during drainage can be met on the basis of ensuring stability.

[0041] Optionally, at the construction joint of the cable trench cover, a bottom splicing joint 101 with a length of 5 cm and a height of 2 cm is extended from the lower end of the cable trench cover; the top splicing joint 105 of the rear cable trench cover is adapted to the bottom splicing joint 101; a sloped drainage ditch 108 and a rubber sealing strip are provided at the bottom splicing joint 101.

[0042] The uppermost end of the splicing plug 102 is higher than the top plane 104 of the cable trench cover body 1, and the inner bottom end surface of the splicing slot 106 is higher than the top plane 104 of the cable trench cover body 1. The bottom end surface of the bottom splicing joint 101 is flush with the bottom end plane 107 of the cable trench cover body 1, and the upper end surface of the top splicing joint 105 is flush with the top plane 104 of the cable trench cover body 1.

[0043] In some other embodiments, the cable trench cover is buckled in the most unfavorable way, and the cover is made taking into account certain manufacturing deviations. The maximum water pressure P of the gap is:

[0044] P=ρ*g*h=1000*9.81*0.005=49pa / m 3 ; The maximum water pressure of the gap is 49pa / m 3 .

[0045] Taking the first region as an example, for example, the seasonal heavy rain rainfall of 35mm-40mm in various regions of Shandong, the external water pressure of the cover plate is obtained by the above formula when h=50mm, which can fill the cover plate joints. If extreme weather occurs, such as heavy rain, the rainfall is 40mm-70mm. In this embodiment, the uppermost end of the splicing plug 102 is 25mm higher than the top plane 104, and the water storage capacity of the cover plate reaches 70mm, and rainwater will not flow into the cable trench.

[0046] The cover plate is provided with a sloped drainage ditch 108, and the sloped drainage ditch 108 can be provided with a rubber strip drainage ditch, and the optional slope is 5‰. The design drawing data is substituted into k*drainage flow rate=slope*hydraulic radius*fluid density*gravitational acceleration=0.005*0.005*1000*9.81=25ml / s. In this embodiment, the sloped drainage ditch 108 is designed with a bidirectional slope. The sloped drainage ditch 108 is a sloped structure inclined from the middle to both ends respectively, with a drainage volume of 50ml per second, and the optional k value range is 0.67-2.79.

[0047] The sloped drainage ditch 108 is set to an arc shape, and its radius is set according to the rainfall conditions in different areas. Half of the arc of the sloped drainage ditch 108 is a variable hydraulic radius; optionally, by adjusting K to change the hydraulic radius, the larger the hydraulic radius, the larger the drainage flow, but the smaller the ultimate stress degree, the smaller the stability; therefore, when the actual rainfall in the area is large, it is necessary to increase the hydraulic radius by increasing the K value to increase the drainage flow and ensure the sewage flushing effect, but the hydraulic radius cannot be too large to avoid affecting stability; on the contrary, when the actual rainfall in the area is small, it is necessary to reduce the hydraulic radius by reducing the K value to improve stability, and at the same time, it can ensure the drainage flow and sewage flushing effect. The relationship between the k value and the rainfall can be obtained by fitting. The arc radius of the drain strip is:

[0048]

[0049] Wherein, k is an adjustment parameter, and the arc radius of the sloped drainage ditch is changed by adjusting the k value.

[0050] In view of the different rainfall in different regions, the drainage capacity of the cable trench cover is based on the parameters designed according to the rainfall in the first region, so as to achieve the effect of water storage inside the cover during seasonal heavy rains throughout the year. Table 2 shows the values ​​of k corresponding to each region.

[0051] Table 2 The values ​​of k corresponding to each region

[0052]

[0053]

[0054] In order to ensure the drainage flow of the cover plate in each area, the k value is changed with reference to the hydraulic radius of the first area, so as to achieve the same drainage effect as that of the first area.

[0055] In some other embodiments, the cover plate strength is calculated as: Among them, F is the stress state of the cover plate, is the calculated strength of the cover plate, b is the width of the cover plate, and h is the thickness of the cover plate. Calculation of the bending strength of the cover plate: f = \frac(M)(W); where M = 0.1\times(1.2times q1+1.4\times q2)times 2 , M is the bending moment, W is the moment of the net section of the panel, q1 and q2 are the standard values ​​of static load and dynamic load. Shear strength T = \frac(3Q)(2bh); where Q = 0.6\times(1.2\times q1+1.4\times q2)\times, T is the calculated value of the section shear strength, Q is the maximum shear force, and b and h are the width and thickness of the cover plate.

[0056] Depend on Figure 4 , Figure 5 , Figure 6 and Figure 7 It can be concluded that the preferred ratio of the cover plate thickness to width is 0.016; when the ratio of the cover plate thickness to width is 0.016, the crack resistance is increased by at least 2.5 times when the thickness is increased by 60%, and the crack resistance can be improved while saving materials.

[0057] The cable trench cover plate optimized by this embodiment meets the drainage slope requirements, so that the drainage strip is kept clean; the overlap crack resistance is at least doubled compared to the original design; and the material consumption is saved on the premise of meeting the drainage slope requirements and improving the strength. Considering the impact of construction, the cable trench cover plate is prone to water seepage at the joints, and rainwater entering the cable trench is prone to cause power transmission failures and safety accidents. This embodiment drains rainwater through the rubber pad drainage ditch for seasonal heavy rain. In case of heavy rain, water retaining plates can also be set to prevent rainwater from flowing into the cable trench.

[0058] Embodiment 2:

[0059] This embodiment provides a method for optimizing a self-draining cable trench cover. When the slope of the sloped drainage ditch 108 is generally 1%-3%, it is not suitable to retain slag and slag, and it can be kept clean for a long time. In Example 1, the slope of the sloped drainage ditch 108 is 5‰. Figure 2 As shown, the slope is adjusted to 1%. When the slope is adjusted to 1%, the thickness of the overlap does not meet the requirement. The bottom splicing joint 101 is now adjusted to a thickest of 17.5 mm and a thinnest of 12.5 mm. The top splicing joint 105 is thickest of 7.5 mm and thinnest of 2.5 mm. The splicing slot 106 can be made of channel steel. The top splicing joint 105 is protected by the channel steel, so although the thickness becomes thinner, its crack resistance is higher than that of the lower cover plate.

[0060] Embodiment 3:

[0061] This embodiment provides a cable trench cover, comprising a cable trench cover body, and a bottom splicing joint and a top splicing joint arranged at both ends of the cable trench cover body;

[0062] A splicing plug is vertically arranged on the bottom splicing joint, and a splicing cavity is arranged between the splicing plug and the cable trench cover body; a sloped drainage ditch is arranged on the bottom splicing joint at the position of the splicing cavity; a splicing slot matching the splicing plug is arranged between the top splicing joint and the cable trench cover body;

[0063] The sloped drainage ditch is arranged in an arc shape, and its radius is set according to the rainfall conditions in different areas.

[0064] The uppermost end of the splicing block is higher than the top plane of the cable trench cover body, and the inner bottom end surface of the splicing slot is higher than the top plane of the cable trench cover body. The sloped drainage ditch is a sloped structure that tilts from the middle to both ends. When the actual rainfall in the area increases, the arc radius of the sloped drainage ditch is increased within a preset range; when the actual rainfall in the area decreases, the arc radius of the sloped drainage ditch is reduced. The arc radius of the drainage strip is:

[0065]

[0066] Wherein, k is an adjustment parameter, and the arc radius of the sloped drainage ditch is changed by adjusting the k value. The relationship between the k value and the rainfall is obtained by fitting.

[0067] The cable trench cover in this embodiment includes all the cable trench covers obtained by the optimization method in Embodiment 1 and Embodiment 2, which will not be described in detail here.

[0068] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A method for optimizing a self-draining cable trench cover, characterized in that: include: A bottom splicing joint and a top splicing joint are respectively arranged at both ends of the cable trench cover body; A splicing plug is vertically arranged on the bottom splicing joint to obtain a splicing cavity between the splicing plug and the cable trench cover body; a sloped drainage ditch is arranged on the bottom splicing joint at the position of the splicing cavity; a splicing slot matching the splicing plug is arranged between the top splicing joint and the cable trench cover body; The sloped drainage ditch is arranged in an arc shape, and its radius is set according to the rainfall conditions in different areas.

2. A method for optimizing a self-draining cable trench cover as claimed in claim 1, characterized in that: The uppermost end of the splicing plug block is higher than the top plane of the cable trench cover body, and the inner bottom end surface of the splicing slot is higher than the top plane of the cable trench cover body.

3. A method for optimizing a self-draining cable trench cover as claimed in claim 1, characterized in that: The sloped drainage ditch is a sloped structure that inclines from the middle to both ends.

4. A method for optimizing a self-draining cable trench cover as claimed in claim 1, characterized in that: When the actual rainfall in the area increases, the arc radius of the sloped drainage ditch is increased within a preset range; when the actual rainfall in the area decreases, the arc radius of the sloped drainage ditch is reduced.

5. A method for optimizing a self-draining cable trench cover as claimed in claim 4, characterized in that: The arc radius of the drain strip is: Wherein, k is an adjustment parameter, and the arc radius of the sloped drainage ditch is changed by adjusting the k value. The relationship between the k value and the rainfall is obtained by fitting.

6. A cable trench cover, characterized in that: It includes a cable trench cover body, and a bottom splicing joint and a top splicing joint arranged at both ends of the cable trench cover body; A splicing plug is vertically arranged on the bottom splicing joint, and a splicing cavity is arranged between the splicing plug and the cable trench cover body; a sloped drainage ditch is arranged on the bottom splicing joint at the position of the splicing cavity; a splicing slot matching the splicing plug is arranged between the top splicing joint and the cable trench cover body; The sloped drainage ditch is arranged in an arc shape, and its radius is set according to the rainfall conditions in different areas.

7. A cable trench cover as claimed in claim 6, characterized in that: The uppermost end of the splicing plug block is higher than the top plane of the cable trench cover body, and the inner bottom end surface of the splicing slot is higher than the top plane of the cable trench cover body.

8. A cable trench cover as claimed in claim 6, characterized in that: The sloped drainage ditch is a sloped structure that inclines from the middle to both ends.

9. A cable trench cover as claimed in claim 6, characterized in that: When the actual rainfall in the area increases, the arc radius of the sloped drainage ditch is increased within a preset range; when the actual rainfall in the area decreases, the arc radius of the sloped drainage ditch is reduced.

10. A cable trench cover as claimed in claim 9, characterized in that: The arc radius of the drain strip is: Wherein, k is an adjustment parameter, and the arc radius of the sloped drainage ditch is changed by adjusting the k value. The relationship between the k value and the rainfall is obtained by fitting.

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