Current cable trench protection structure in soft soil area

Abstract

The utility model relates to a current cable trench protection structure in a soft soil area. The current cable trench protection structure comprises a current cable trench, a self-stabilizing filling body, a cover plate, a cover plate base and a buffer layer, the self-stabilizing filling bodies are arranged on the two sides of the current cable trench. The cover plate base is fixedly arranged at the top of the inner side of the self-stabilizing filling body; the cover plate is detachably mounted on the cover plate base; gaps are reserved between the current cable trench and the self-stabilizing filling bodies on the two sides, and buffer layers are arranged. According to the utility model, the current cable trench cover plate is prevented from receiving vertical vehicle load; lateral soil pressure on the side wall of the cable trench is avoided, the work amount of earth excavation is reduced, and the manufacturing cost is saved; long-term settlement is reduced, and the method is more suitable for soft soil areas; the cover plate and the self-stabilizing filling bodies on the two sides are prevented from sliding in the transverse direction due to vehicle running; local fracture of concrete at the edge of the cover plate is avoided; and lifting after prefabrication and uncovering maintenance during use are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal road widening and reconstruction, and particularly relates to a protection structure for an existing cable trench in soft soil areas. Background Art

[0002] At present, with the gradual improvement of urbanization construction and the tightening of urban scale expansion, China has entered an important period of urban renewal that emphasizes both the improvement of the quality of existing stock and the adjustment of the incremental structure instead of large-scale incremental construction in the past. This means that there are fewer new municipal road projects in the outlying areas, and instead, a large number of existing municipal road widening and reconstruction projects are carried out in the main urban areas. Widening means converting the original green belt and sidewalk parts into motor vehicle lanes or non-motor vehicle lanes. However, the particularity of municipal roads lies in that many pipelines are laid under the original green belt and sidewalk, mainly including strong and weak electricity, rainwater and sewage, and gas. Among them, the high-voltage cable trench is a pipeline with a relatively large cross-section and requires frequent maintenance. The cable trench originally located on the sidewalk can only be used for pedestrians to pass. After the road is widened, it needs to bear the driving and parking of motor vehicles. In order to ensure the protection of the cable trench during construction and road operation, carrying out research in this area has high engineering application value.

[0003] The defects of the prior art are as follows:

[0004] Since the cable trench originally located on the sidewalk can only be used for pedestrians to pass, after the road is widened, it needs to bear the driving and parking of motor vehicles, which leads to the damage of the cable trench structure and further interferes with the normal operation of the cable. Summary of the Invention

[0005] The utility model aims at the above problems and provides a protection structure for an existing cable trench in soft soil areas, aiming to avoid the vertical vehicle load on the existing cable trench cover plate; avoid the lateral earth pressure on the side wall of the existing cable trench, reduce the earthwork excavation volume and thus save the cost; reduce the long-term settlement, be more suitable for soft soil areas; avoid the lateral sliding of the cover plate and the self-stabilizing filling bodies on both sides caused by vehicle driving; avoid the local cracking of the concrete at the edge of the cover plate; facilitate hoisting after prefabrication and uncovering for maintenance during use.

[0006] To solve the above problems, the technical solution provided by the utility model is as follows:

[0007] A protection structure for an existing cable trench in soft soil areas includes an existing cable trench, self-stabilizing filling bodies, a cover plate, a cover plate base, and a buffer layer, wherein: the self-stabilizing filling bodies are arranged on both sides of the existing cable trench; the cover plate base is fixedly arranged at the top of the inner side of the self-stabilizing filling bodies; the cover plate is detachably installed on the cover plate base; a gap is reserved between the existing cable trench and the self-stabilizing filling bodies on both sides, and the buffer layer is arranged.

[0008] Preferably, the cover plate is a precast reinforced concrete cover plate; a steel lifting ring is provided on the top of the cover plate; a stainless steel edging is provided around the cover plate; and the stainless steel edging is fixedly connected to the first steel bars embedded in the cover plate.

[0009] Preferably, the cover plate base is a cast-in-place reinforced concrete structure and is provided with a tongue-and-groove joint; a stainless steel angle steel is embedded at the tongue-and-groove joint; and the stainless steel angle steel is fixedly connected to the second steel bars embedded in the cover plate base.

[0010] Preferably, the specification of the stainless steel edging is 50x4; and the specification of the stainless steel angle steel is 100x4.

[0011] Preferably, the bottom of the self-stabilizing filling body is stepped, and the ratio of the height to the width of each step is set within a proportional range that ensures the stability of the slope after the excavation of the original soil.

[0012] Preferably, a graded broken stone cushion layer is provided at the bottom of the self-stabilizing filling body for coordinating the uneven settlement of the self-stabilizing filling body.

[0013] Preferably, the self-stabilizing filling body is made of aerated lightweight soil, with a unit weight grade of W10 and a strength grade of CF1.0.

[0014] Preferably, the width of the bottom step of the self-stabilizing filling body is 0.75 m, the height is 0.5 m, and the ratio of the height to the width of each step is 1:1.5.

[0015] Preferably, the material of the buffer layer is a closed-cell polyethylene foam plastic board.

[0016] Preferably, the thickness of the closed-cell polyethylene foam plastic board is 30 mm.

[0017] The present utility model has the following advantages compared with the prior art:

[0018] 1. Since the present utility model transfers the top load of the cable trench to the two side self-stabilizing filling bodies through the setting of the cover plate, and evenly transfers the load to the soil on both sides of the cable trench through the stepped bottom of the filling body, the direct vertical vehicle load on the existing cable trench cover plate is avoided.

[0019] 2. Since the present utility model excavates the original soil to a stepped shape and ensures its stability during the trench excavation, the earth pressure on both sides of the existing cable trench is eliminated, and then the self-stabilizing filling body is poured, so that the lateral earth pressure on the side wall of the existing cable trench is avoided, and the earthwork excavation quantity is also reduced, thus saving the cost.

[0020] 3. Since the utility model has a relatively large bottom area of the self-stabilizing filling body, it better evenly distributes the vehicle load on the upper part of the cover plate, generates less additional stress on the original soil, thereby reducing long-term settlement and being more suitable for soft soil areas.

[0021] 4. Since the utility model is provided with a rabbet at the cover plate base, it better avoids the lateral sliding of the cover plate and the self-stabilizing filling bodies on both sides caused by vehicle driving.

[0022] 5. Since the utility model is provided with a stainless steel edging around the cover plate and stainless steel angle steel at the cover plate base, both of which are connected by pre-buried steel bars, it strengthens the ability of the structure to withstand the dynamic load of vehicle driving, thereby avoiding local cracking of the concrete at the edge of the cover plate.

[0023] 6. Since the utility model is provided with steel lifting rings on the cover plate, it is convenient for hoisting after prefabrication and uncovering for maintenance during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the protection structure of the existing cable trench in soft soil areas of the specific embodiment of the utility model;

[0025] Figure 2 Schematic diagram of the cover plate base of the protection structure of the existing cable trench in soft soil areas of the specific embodiment of the utility model;

[0026] Figure 3 Schematic plan view of the cover plate of the protection structure of the existing cable trench in soft soil areas of the specific embodiment of the utility model;

[0027] Figure 4 Schematic diagram of the A-A cross-section in 3;

[0028] Wherein: 1. Existing cable trench, 2. Self-stabilizing filling body, 3. Cover plate, 4. Cover plate base, 5. Stainless steel edging, 6. Stainless steel angle steel, 7. Buffer layer, 8. Angle steel pre-buried steel bar, 9. Cover plate steel lifting ring, 10. Edging pre-buried steel bar. DETAILED DESCRIPTION OF THE INVENTION

[0029] The following further clarifies the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art fall within the scope defined by the appended claims of this application.

[0030] As Figure 1As shown in the figure, the existing cable trench protection structure in soft soil areas includes the existing cable trench 1, the self-stabilizing filling body 2, the cover plate 3, the cover plate base 4, and the buffer layer 7. Among them: The self-stabilizing filling body 2 is arranged on both sides of the existing cable trench 1; the cover plate base 4 is fixedly arranged at the top inside the self-stabilizing filling body 2; the cover plate 3 is detachably installed on the cover plate base 4; a gap is reserved between the existing cable trench 1 and the self-stabilizing filling bodies 2 on both sides, and a buffer layer 7 is arranged.

[0031] As Figure 3 , Figure 4 shown, it should be noted that the cover plate 3 is a precast reinforced concrete cover plate; a steel lifting ring 9 is provided on the top of the cover plate 3; a stainless steel edging 5 is arranged around the cover plate 3; the stainless steel edging 5 is fixedly connected to the first steel bar 10 embedded inside the cover plate 3.

[0032] It should be further noted that the precast reinforced concrete cover plate 3 can save the construction period; the steel lifting ring 9 on the cover plate is convenient for hoisting after precasting and uncovering for maintenance during use; the stainless steel edging 5 is used to prevent the dynamic load of vehicle driving from damaging the edge concrete of the cover plate.

[0033] As Figure 2 shown, it should be noted that the cover plate base 4 is a cast-in-place reinforced concrete structure and is provided with a tongue-and-groove joint; a stainless steel angle steel 6 is embedded at the tongue-and-groove joint; the stainless steel angle steel 6 is fixedly connected to the second steel bar 8 embedded inside the cover plate base 4.

[0034] It should be further noted that the tongue-and-groove joint structure of the cover plate base 4 avoids the lateral sliding of the cover plate 3 and the self-stabilizing filling bodies 2 on both sides caused by vehicle driving; the stainless steel angle steel 6 is used to prevent the dynamic load of vehicle driving from damaging the cover plate base concrete.

[0035] In this specific embodiment, the specification of the stainless steel edging 5 is 50x4; the specification of the stainless steel angle steel 6 is 100x4.

[0036] In this specific embodiment, the self-stabilizing filling body 2 is made of aerated lightweight soil, with a bulk density grade of W10 and a strength grade of CF1.0.

[0037] It should be noted that the bottom of the self-stabilizing filling body 2 is stepped, and the ratio of the height to the width of each step is set in a ratio range that ensures the stability of the slope after the excavation of the original soil.

[0038] In this specific embodiment, the width of the bottom step of the self-stabilizing filling body 2 is 0.75 m, the height is 0.5 m, and the ratio of the height to the width of each step is 1:1.5. The excavation method of the self-stabilizing filling body 2 can ensure the stability of the slope of the original soil and the overall stability of the self-stabilizing filling body 2.

[0039] It should be further noted that a graded crushed stone cushion layer is provided at the bottom of the self-stabilizing filling body 2 for coordinating the uneven settlement of the self-stabilizing filling body 2. The graded crushed stone cushion layer can not only facilitate the pouring construction of the self-stabilizing filling body, but also play the role of coordinating the uneven settlement of the self-stabilizing filling body 2.

[0040] In this specific embodiment, the material of the buffer layer 7 is a closed-cell polyethylene foam board. The thickness of the closed-cell polyethylene foam board is 30 mm.

[0041] It should be noted that the buffer layer 7 can ensure that the self-stabilizing filling body 2 does not interact with the existing cable trench 1 during pouring, and the two are completely separated, and their long-term settlements do not affect each other.

[0042] It should be noted that the specific implementation steps of the protection structure for the existing cable trench in soft soil areas of the present utility model are as follows:

[0043] Step 1: Reconnoiter the site and investigate the structural form and dimensions of the existing cable trench 1.

[0044] Step 2: Excavate the trenches on both sides of the existing cable trench 1 and excavate them into a stepped shape.

[0045] Step 3: After setting the buffer layer 7 at the side wall of the existing cable trench 1, lay the graded crushed stone cushion layer.

[0046] Step 4: Pour the self-stabilizing filling body 2 and the cover base 4.

[0047] Step 5: Hoist the new cover plate 3.

[0048] The construction process of the present utility model is mature, has no disturbance to the existing cable trench, and is convenient for construction.

[0049] In the above detailed description, various features are combined in a single embodiment to simplify the present disclosure. This method of disclosure should not be construed as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly recited in each claim. On the contrary, as reflected in the appended claims, the present invention is in a state with fewer features than all the features of the disclosed single embodiment. Therefore, the appended claims are hereby clearly incorporated into the detailed description, where each claim stands alone as a separate preferred embodiment of the present invention.

[0050] The above-described disclosed embodiments are provided so that any person skilled in the art can implement or use the present invention. For those skilled in the art, various modifications to these embodiments are obvious, and the general principles defined herein can also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0051] The above description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but those of ordinary skill in the art should recognize that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, this term is covered in a manner similar to the term "including", as interpreted when "including" is used as a transitional word in a claim. In addition, any use of the term "or" in the claims or specification is intended to mean "non-exclusive or".

[0052] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cable trench protection structure for existing applications in soft soil areas, characterized by: The invention comprises an existing cable trench (1), a self-stabilizing filling body (2), a cover plate (3), a cover plate base (4), and a buffer layer (7), wherein: the self-stabilizing filling body (2) is arranged on both sides of the existing cable trench (1); the cover plate base (4) is fixedly arranged on the top of the inner side of the self-stabilizing filling body (2); the cover plate (3) is detachably mounted on the cover plate base (4); a gap is reserved between the existing cable trench (1) and the self-stabilizing filling bodies (2) on both sides, and the buffer layer (7) is arranged.

2. The existing cable trench protection structure in soft soil area according to claim 1 is characterized by: The cover plate (3) is a prefabricated reinforced concrete cover plate; a cover plate steel lifting ring (9) is provided on the top of the cover plate (3); stainless steel edging (5) is provided around the cover plate (3); the stainless steel edging (5) is fixedly connected to a first steel bar (10) pre-buried inside the cover plate (3).

3. The existing cable trench protection structure in soft soil area according to claim 2 is characterized by: The cover plate base (4) is a cast-in-place reinforced concrete structure and is provided with a tongue and groove; a stainless steel angle steel (6) is pre-buried in the tongue and groove; the stainless steel angle steel (6) is fixedly connected to a second steel bar (8) pre-buried inside the cover plate base (4).

4. The existing cable trench protection structure in soft soil area according to claim 3 is characterized by: The specification of the stainless steel edging (5) is 50x4; the specification of the stainless steel angle steel (6) is 100x4.

5. The existing cable trench protection structure in soft soil area according to claim 4 is characterized by: The bottom of the self-stabilizing filling body (2) is stepped, and the ratio of the height to the width of each step is set to a ratio range that ensures that the slope remains stable after the original soil is excavated.

6. The existing cable trench protection structure in soft soil area according to claim 5 is characterized by: The bottom of the self-stabilizing compact (2) is provided with a graded crushed stone cushion layer for coordinating the uneven settlement of the self-stabilizing compact (2).

7. The existing cable trench protection structure in soft soil area according to claim 6 is characterized by: The self-stabilizing filling body (2) is made of air bubble mixed lightweight soil, and has a bulk density grade of W10 and a strength grade of CF1.

0.

8. The existing cable trench protection structure in soft soil area according to claim 7 is characterized by: The width of the bottom step of the self-stabilizing compact (2) is 0.75m, the height is 0.5m, and the ratio of the height to the width of each step is 1:1.

5.

9. The existing cable trench protection structure in soft soil area according to claim 8 is characterized by: The material of the buffer layer (7) is a closed-cell polyethylene foam plastic board.

10. The existing cable trench protection structure in soft soil area according to claim 9, characterized in that: The thickness of the closed-cell polyethylene foam plastic board is 30 mm.

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