Combined cable trench collapse prevention device and use method thereof

Abstract

The invention relates to a combined collapse prevention device for a cable trench. The combined collapse prevention device comprises a protective square steel tube, square tube split bolts, double-end tightening bolts, a cantilever square steel tube, a sleeve square steel tube and fixing bolts, four sections of protective square steel pipes are taken, and every two sections of protective square steel pipes are fixed and clamped through the split bolts; a double-end tightening bolt is inserted between the transversely adjacent protective square steel pipes for fixing; two rows of sleeve square steel pipes are welded to the tops of the two protective square steel pipes located on the upper portion, the cantilever square steel pipes are inserted into the sleeve square steel pipes, a plurality of corresponding positioning holes are formed between the sleeve square steel pipes and the cantilever square steel pipes, and proper positioning holes are selected to be fixed through fixing bolts and keep scalability. According to the invention, temporary support can be carried out near the intersecting part of the cable trench in the earth excavation process, and after the backfilling action of the part where the pipeline construction is completed is completed, the temporarily supported part can be adjusted along the length direction of the pipeline; and meanwhile, the mounting, the dismounting and the adjustment are very convenient.

Description

Technical Field

[0001] This invention relates to a combined cable trench anti-collapse device and its application method, belonging to the field of urban underground pipeline construction technology. Background Technology

[0002] Cable trenches are generally made of concrete and are used to place underground cables. They are usually long strips of concrete with a U-shaped cross-section.

[0003] Urban underground pipelines (such as water pipes and sewage pipes) are often installed below cable trenches, usually at a certain angle. When excavation is carried out during pipeline maintenance and repair, the cable trench often sinks when it intersects with the trench, which affects the construction.

[0004] There is no suitable solution in the existing technology for the problem of cable trench subsidence caused by pipeline excavation. Summary of the Invention

[0005] The purpose of this invention is to provide a combined cable trench anti-collapse device that can provide temporary support near the intersection of cable trenches during earthwork excavation. After the backfilling is completed at the section where pipeline construction is finished, the temporary support can be adjusted along the length of the pipeline. At the same time, installation, dismantling and adjustment are very convenient.

[0006] The present invention adopts the following technical solution:

[0007] A combined cable trench anti-collapse device includes a protective square steel pipe 1, square pipe tie bolts 2, double-ended tightening bolts 4, a cantilevered square steel pipe 5, a sleeve square steel pipe 8, and fixing bolts 7. Four sections of the protective square steel pipe 1 are taken and fixed and clamped together in pairs by the tie bolts 2. Double-ended tightening bolts 4 are inserted between the horizontally adjacent protective square steel pipes 1 for fixation. Two rows of sleeve square steel pipes 8 are welded to the top of the two upper protective square steel pipes 1, and the cantilevered square steel pipes 5 are inserted therein. Several corresponding positioning holes are provided between them. The appropriate positioning holes are selected and fixed by fixing bolts 7 to maintain extensibility.

[0008] Preferably, the horizontally adjacent cantilevered square steel pipes 5 are fixedly connected by cantilever balance bolts 9 to improve the overall integrity and stability.

[0009] Preferably, the cross-section of the sleeve square steel tube 8 is inverted U-shaped, so that the lower end of the fixing bolt 7 is suspended.

[0010] Preferably, the protective square steel pipe 1 is a rectangular pipe.

[0011] Preferably, it also includes a sponge pad 3, which is disposed between the two upper protective square steel pipes 1 in the cable trench.

[0012] Preferably, it also includes a wooden template 6, which is disposed between the two lower protective square steel pipes 1 and the cable trench.

[0013] Preferably, the double-headed tightening bolts 4 have three bolts, which are equally spaced.

[0014] Preferably, the four sections of the protective square steel pipe 1 are of equal length.

[0015] A method for using the aforementioned combined cable trench anti-collapse device involves excavating on both sides of the cable trench in the area of ​​interference during pipeline excavation when interference occurs. The combined cable trench anti-collapse device is used to temporarily suspend the cable trench and place it on the road surface or cable trench cover via the cantilevered square steel pipes 5 on both sides. Based on the progress of pipeline construction and backfilling, after disassembling and assembling the two lower protective square steel pipes 1 and tightening the double-headed bolts 4, the sleeve square steel pipe 8, along with the two protective square steel pipes 1 welded to it, is moved laterally. This allows for the gradual adjustment of the suspended position of the cable trench by the combined cable trench anti-collapse device. Backfilling is carried out during this gradual adjustment process, thereby completing the re-fixation of the cable trench.

[0016] Preferably, the specific steps include: selecting four equal-length square steel pipes as protective square steel pipes 1, fixing them in pairs in the vertical direction with tie bolts 2, using sponge pads to protect the contact surface between the protective square steel pipes 1 and the cable trench, and using equal-section wooden templates to support the bottom of the cable trench; drilling holes at equal intervals in the middle of the protective square steel pipes 1, inserting double-ended tightening bolts 4 for fixation, and simultaneously welding two rows of sleeve square steel pipes 8 to the top of the protective square steel pipes 1, inserting cantilever square steel pipes 5 into them, both of which are drilled with holes, and maintaining extensibility through fixing bolts 7, forming a top telescopic cantilever structure, which is adjusted for telescopic expansion according to the construction distance on both sides.

[0017] The beneficial effects of this invention are as follows:

[0018] 1) Temporary supports can be installed near the intersection of cable trenches during earthwork excavation. After the backfilling is completed at the pipeline construction site, the temporary supports can be adjusted along the length of the pipeline. Installation, removal, and adjustment are all very convenient.

[0019] 2) This combined cable trench anti-collapse device is a temporary device built using conventional on-site construction materials. All materials used, such as square steel pipes and tie bolts, are common on-site materials. Drilling can be easily completed on-site, making it very convenient to implement. No matching products are required, and no product assistance is needed from the manufacturer. It is easy to implement, has good reliability, and is highly scalable.

[0020] 3) The entire protective device is tightly fixed by adjusting the vertical distance with tie bolts, and the sponge pads protect the original cable trench structure. The cantilever structure is adopted, like a carrying pole, with two sections supporting the surrounding road surface. At the same time, the top telescopic cantilever structure can be adjusted in real time according to the construction distance on both sides to achieve the effect of double protection. The modular structure is assembled and installed when in use and disassembled when not in use. (Except for the welded part between the top sleeve square steel pipe 8 and the protective square steel pipe 1), each part is placed as a single unit, which does not occupy space and can be reused.

[0021] 4) In particular, it solves the problem of excavation and protection at the bottom of cable trenches in the technical renovation project of old factory area. It adopts an upper cantilever structure to avoid bottom support, creating convenient conditions for construction at the bottom of cable trenches (such as laying underground pipelines). The structure is reasonable and easy to install. Attached Figure Description

[0022] Figure 1 This is the front view (elevation) of the combined cable trench anti-collapse device of the present invention.

[0023] Figure 2 This is a left view (elevation) of the combined cable trench anti-collapse device of the present invention.

[0024] Figure 3 This is a schematic diagram of the cross-section of the cable trench.

[0025] In the diagram, 1. Protective square steel pipe, 2. Square pipe tie bolt, 3. Sponge gasket, 4. Double-ended tightening bolt, 5. Cantilevered square steel pipe, 6. Wooden template, 7. Fixing bolt, 8. Sleeve square steel pipe, 9. Cantilever balance bolt. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Cable trenches are cast-in-place concrete structures, typically with a concave cross-section (e.g., ...). Figure 3 The top groove is used to hold cables. Figure 1 The shaded area in the image represents the side of the cable trench.

[0028] During metallurgical engineering construction, many older plant areas require technical upgrades. The cable trenches in these areas are often shallowly buried due to limitations in the construction techniques used at the time. Since these trenches cannot be damaged during upgrades, excavation is necessary at the bottom of the trenches. To ensure construction safety during excavation, these trenches must be protected to prevent accidental collapse. This invention provides a structurally sound and easily installed combined cable trench anti-collapse device using conventional construction materials. Its main principle is to fix the protective device with tie bolts, and increase the contact area through a cantilevered top structure, achieving a double protective effect and ensuring structural safety to prevent collapse.

[0029] See Figure 1-2 A combined cable trench anti-collapse device includes a protective square steel pipe 1, square pipe tie bolts 2, double-headed tightening bolts 4, a cantilevered square steel pipe 5, a sleeve square steel pipe 8, and fixing bolts 7. Four sections of the protective square steel pipe 1 are taken and fixed and clamped together in pairs by the tie bolts 2. Double-headed tightening bolts 4 are inserted between the horizontally adjacent protective square steel pipes 1 for fixation. Two rows of sleeve square steel pipes 8 are welded to the top of the two upper protective square steel pipes 1, and the cantilevered square steel pipes 5 are inserted therein. Several corresponding positioning holes are provided between them. The appropriate positioning holes are selected and fixed by fixing bolts 7 to maintain extensibility.

[0030] In this embodiment, such as Figure 1-2 As shown, the horizontally adjacent cantilevered square steel pipes 5 are fixedly connected by cantilever balance bolts 9 to improve the overall integrity and stability.

[0031] In this embodiment, see Figure 2 The cross-section of the sleeve square steel tube 8 is inverted U-shaped, so that the lower end of the fixing bolt 7 is suspended.

[0032] In this embodiment, see Figure 1 The protective square steel pipe 1 is a rectangular pipe.

[0033] In this embodiment, see Figure 1-2 It also includes a sponge pad 3, which is disposed between the two upper protective square steel pipes 1 in the cable trench.

[0034] In this embodiment, see Figure 1-2 It also includes a wooden template 6, which is set between the two lower protective square steel pipes 1 and the cable trench.

[0035] In this embodiment, see Figure 2 The double-headed tightening bolt 4 has three bolts, which are evenly spaced.

[0036] In this embodiment, see Figure 1-2 The four sections of the protective square steel pipe 1 are all of equal length.

[0037] When encountering interference from cable trenches during pipeline excavation, excavation is carried out on both sides of the cable trench in the area of ​​interference. The cable trench is temporarily suspended using this combined cable trench anti-collapse device and placed on the road surface or cable trench cover by the cantilevered square steel pipes 5 on both sides. According to the progress of pipeline construction and earthwork backfilling, after disassembling and assembling the two lower protective square steel pipes 1 and tightening the double-headed bolts 4 on them, the sleeve square steel pipe 8 together with the two protective square steel pipes 1 welded to it is moved laterally. This allows the combined cable trench anti-collapse device to gradually adjust the suspension position of the cable trench. Earthwork backfilling is carried out during the gradual adjustment process, thereby completing the re-fixation of the cable trench.

[0038] Specifically, the steps include: selecting four equal-length square steel pipes as protective square steel pipes 1, fixing them in pairs in the vertical direction with tie bolts 2; using sponge pads to protect the contact surface between the protective square steel pipes 1 and the cable trench; and using equal-section wooden templates to support the bottom of the cable trench; drilling holes at equal intervals in the middle of the protective square steel pipes 1, inserting double-ended tightening bolts 4 for fixation; simultaneously welding two rows of sleeve square steel pipes 8 to the top of the protective square steel pipes 1, inserting cantilever square steel pipes 5 into them, and drilling holes in both; maintaining flexibility through fixing bolts 7 to form a top telescopic cantilever structure; the top telescopic cantilever structure is adjusted according to the construction distance on both sides to achieve a double protection effect.

[0039] The combined cable trench anti-collapse device includes: 1. Protective square steel pipe; 2. Square pipe tie bolt; 3. Sponge gasket; 4. Double-ended tightening bolt; 5. Wooden template; 6. Cantilevered square steel pipe; 7. Sleeve square steel pipe; 8. Fixing bolt; 9. Cantilevered balance bolt, etc.

[0040] Four sections of equal-length square steel pipe are selected as the protective square steel pipe 1, and the four sides are fixed and clamped by tie bolts 2. The contact surface between the protective square steel pipe 1 and the cable trench is protected with sponge pads, and the bottom of the cable trench is supported by wooden templates with equal cross-section.

[0041] To ensure the balance of the protective square steel pipes, holes of equal length are drilled in the middle of the pipes, and double-headed bolts 4 are inserted and tightened for fixation. At the same time, two rows of sleeve square steel pipes 8 are welded to the top of the protective square steel pipe 1, and cantilever square steel pipes 5 are inserted and concentrated. The two are drilled together, and the expansion and contraction are maintained by fixing bolts 7. The upper cantilever structure, like a carrying pole, is supported on the surrounding road surface in two sections. At the same time, the top expansion and contraction cantilever structure can be adjusted in real time according to the construction distance on both sides to achieve the effect of double protection.

[0042] This invention utilizes conventional on-site construction materials to solve the problem of protecting the bottom of cable trenches during renovation projects in old factory areas. It employs a cantilevered structure, eliminating the need for bottom support and facilitating construction at the bottom of the cable trench (such as laying underground pipelines). The structure is rational and easy to install. Using conventional on-site construction materials eliminates the need for additional material procurement. The device is securely fixed by adjusting the vertical distance with tie bolts, while sponge pads protect the existing cable trench structure. The cantilevered structure, like a carrying pole, rests on the surrounding road surface at both ends. The top telescopic cantilever structure can be adjusted in real-time according to the construction distance on both sides, achieving double protection. The modular structure allows for assembly and installation during use and disassembly when not in use; each component functions as a standalone unit, saving space.

[0043] The above are preferred embodiments of the present invention. Those skilled in the art can make various modifications or improvements based on these embodiments. Without departing from the overall concept of the present invention, such modifications or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A combined cable trench anti-collapse device, characterized in that: Includes protective square steel pipe (1), square pipe tie bolt (2), double-ended tightening bolt (4), cantilever square steel pipe (5), sleeve square steel pipe (8), and fixing bolt (7); Take four sections of the protective square steel pipe (1), and fix them together in pairs using the tie bolts (2); insert double-headed tightening bolts (4) between the horizontally adjacent protective square steel pipes (1) for fixation; Two rows of sleeve square steel pipes (8) are welded to the top of the two protective square steel pipes (1) at the top, and the cantilever square steel pipe (5) is inserted therein. Several corresponding positioning holes are provided between the two. The appropriate positioning holes are selected and fixed by fixing bolts (7) to maintain extensibility.

2. The combined cable trench anti-collapse device as described in claim 1, characterized in that: The horizontally adjacent cantilevered square steel pipes (5) are fixedly connected by cantilever balance bolts (9) to improve the integrity and stability.

3. The combined cable trench anti-collapse device as described in claim 1, characterized in that: The cross-section of the sleeve square steel tube (8) is inverted U-shaped, so that the lower end of the fixing bolt (7) is suspended.

4. The combined cable trench anti-collapse device as described in claim 1, characterized in that: The protective square steel pipe (1) is a rectangular pipe.

5. The combined cable trench anti-collapse device as described in claim 1, characterized in that: It also includes a sponge pad (3), which is placed between the two upper protective square steel pipes (1) in the cable trench.

6. The combined cable trench anti-collapse device as described in claim 1, characterized in that: It also includes a wooden template (6), which is set between the two lower protective square steel pipes (1) and the cable trench.

7. The combined cable trench anti-collapse device as described in claim 1, characterized in that: The double-headed tightening bolt (4) has three bolts, which are equally spaced.

8. The combined cable trench anti-collapse device as described in claim 1, characterized in that: The protective square steel pipes (1) in the four sections are of equal length.

9. A method of using the combined cable trench anti-collapse device according to any one of claims 1-8, characterized in that: When the pipeline is excavated and the cable trench is interfered with, the cable trench is excavated on both sides of the interference area, and the cable trench is temporarily suspended by this combined cable trench anti-collapse device and placed on the road surface or cable trench cover by the cantilevered square steel pipes (5) on both sides. According to the progress of pipeline construction and earthwork backfilling, after disassembling and assembling the two lower protective square steel pipes (1) and tightening the double-headed bolts (4) on them, the sleeve square steel pipe (8) together with the two protective square steel pipes (1) welded and fixed to it is moved laterally, thereby realizing the gradual adjustment of the suspension position of the cable trench by this combined cable trench anti-collapse device. During the gradual adjustment process, earthwork backfilling is carried out, thereby completing the re-fixing of the cable trench.

10. The method of using the combined cable trench anti-collapse device as described in claim 9, characterized in that, Specifically, the following steps are included: Four equal-length square steel pipes are selected as protective square steel pipes (1), and they are fixed and clamped in pairs in the upper and lower directions by tie bolts (2). The contact surface between the protective square steel pipe (1) and the cable trench is protected by sponge pads, and the bottom of the cable trench is supported by wooden templates with equal cross-sections. Drill holes at equal lengths in the middle of the protective square steel pipe (1), insert double-headed tightening bolts (4) for fixation, and weld two rows of sleeve square steel pipes (8) to the top of the protective square steel pipe (1), inserting cantilever square steel pipes (5) into them. Both are drilled with holes and the expansion and contraction are maintained by fixing bolts (7), forming a top expansion and contraction cantilever structure. The top expansion and contraction cantilever structure is adjusted according to the construction distance on both sides.

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