A cable trench layout method for energy storage power stations to prevent uneven settlement of cable trenches

Abstract

The present invention provides a cable trench arrangement method for an energy storage power station for preventing uneven settlement of the cable trench, comprising the following steps: arranging a main cable trench between two adjacent prefabricated cabin foundations, and passing through a first first cable branch trench to be connected to a second first cable branch trench, the main cable trench being erected on a pedestal beam newly added between the prefabricated cabin foundations, the side walls of the first cable branch trench, and the pedestal at the cable entrance; laying the first and second cable branch trenches through the prefabricated cabin foundations, erecting the first cable branch trench on the longitudinal pedestal beam of the prefabricated cabin foundation, and erecting the second cable branch trench on the transverse pedestal beam of the prefabricated cabin foundation and the side walls of the first cable branch trench; setting the pedestal at the cable entrance and the top elevation of each pedestal beam according to the bottom elevation of the bottom plate of each cable trench; and reinforcing the cable trench side wall holes generated by the perpendicular intersection of the main cable trench and the first cable branch trench, and the first cable branch trench and the second cable branch trench.

Description

Technical Field

[0001] The present invention relates to the field of energy storage power station engineering construction, and in particular to a cable trench arrangement method for an energy storage power station for preventing uneven settlement of the cable trench. Background Art

[0002] The existing energy storage power station energy storage area is considered separately in the layout of prefabricated cabin foundation and cable trench, without considering the synergy. Take an energy storage partition as an example, Figure 7 The shaded area in the figure represents the fire protection ring road for this zone, the dashed box represents the prefabricated cabin foundation, and the thick solid line represents the cable trench. Cables are routed from the booster zone's cable inlet to the main cable trench, which then leads to the first branch cable trench. Secondary branch cable trenches then extend from the first branch cable trench to the bottom of each prefabricated cabin and subsequently to the energy storage equipment.

[0003] In the existing layout scheme, the main cable trench and the first cable branch trench are located outside the prefabricated cabin foundation in plane position and do not work together. Although the second cable branch trench is located above the prefabricated cabin foundation, there is no substantial force contact between the two. When the geological conditions of the site are poor, such as there is a deep and weak soil layer, the prefabricated cabin foundation generally adopts a pile foundation solution to solve the settlement problem of the prefabricated cabin. The pile end falls on the incompressible soil layer, and the settlement of the second cable branch trench and the prefabricated cabin foundation is almost synchronized, and is small enough to be negligible. However, the main cable trench and the first cable branch trench are located on a deep and weak soil layer. If anti-settlement measures are not taken, the main cable trench and the first cable branch trench are prone to serious uneven settlement along the longitudinal direction of the trench. Since the settlement of the second cable branch trench is extremely small, more serious uneven settlement occurs at the junction of the first cable main trench and the second cable branch trench.

[0004] Existing technology, such as Chinese patent number "CN106087957A," discloses a method for preventing subsidence in cable trenches for power distribution rooms constructed on coastal muddy soil. The method includes the following steps: chiseling away all cracked floors and reinforcing the foundation using lime piles or high-pressure jet grouting; arranging lime piles around the transformer and cable trench at a depth of 1.5 meters, spaced 3D apart; and repairing existing subsidence by paving with steel or concrete blocks to return it to the original design elevation. This method improves the floor's ability to resist subsidence, meeting foundation design requirements and providing greater building stability. A Chinese patent, CN111181122A, discloses a novel cable trench structure for preventing uneven settlement. The structure comprises a main cable trench body and wing panels disposed on either side of the main cable trench body. The main cable trench body has a rectangular cross-section, with outwardly protruding bottom portions on both sides. The lower ends of the wing panels are hinged to the protruding portions of the lower end of the main cable trench body, and the upper ends of the wing panels are connected to the upper end of the main cable trench body by length-adjustable tie rods. Wedge-shaped concrete blocks are provided at the angle between the main cable trench body and the lower ends of the wing panels. The structure of the present invention is used in weakened strata along the cable trench line. To ensure that the settlement of the cable trench in weakened strata is consistent with that in normal strata, the required foundation width for the cable trench in weakened strata can be calculated using methods such as finite element analysis, and ultimately achieved by adjusting the vertical angle between the wing panels on either side of the cable trench. The present invention can prevent structural damage to the cable trench due to uneven settlement without increasing the amount of earthwork, thereby protecting the normal operation of the cable line.

[0005] The problems with the above-mentioned prior art are: for example, the solution with patent number "CN106087957A" adopts a solution of performing composite foundation treatment on the entire energy storage area to solve the settlement problem of the prefabricated cabin foundation and the cable trench. The main disadvantage of this solution is that the energy storage area of ​​the distributed energy storage power station occupies a large area, and the cost of composite foundation treatment for the entire site is high, which has a high economic cost. Another commonly used solution is to use a local replacement solution for the soft soil layer under the cable trench. This solution is only applicable to cases where the thickness of the soft soil layer is less than 3m. When the soft soil layer is thicker, the replacement solution can only treat the soft soil layer with a thickness of about 2m under the trench, and there is still a thicker soft soil layer under the replacement soil layer. For example, the solution of changing the cable trench structure is adopted in patent number "CN111181122A". This solution increases the cost of the cable trench, increases the difficulty of construction, and has poor economy and feasibility in actual engineering use. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a convenient, economical and feasible method for arranging cable trenches in energy storage power stations to prevent uneven settlement of cable trenches, so as to solve the problems raised in the above background technology. The present invention combines the energy storage cabin foundation and the cable trench for overall arrangement, and combines the elevation and reasonable structural structure to transfer the loads of the main cable trench, the first cable branch trench, and the second cable branch trench to the pedestal, thereby utilizing the pile foundation under the pedestal to solve the problem of uneven settlement of all cable trenches in the energy storage area.

[0007] The technical solutions of the present invention are as follows:

[0008] A method for arranging a cable trench in an energy storage power station to prevent uneven settlement of the cable trench comprises:

[0009] The main cable trench is arranged between two adjacent prefabricated cabin foundations, and passes through the first cable branch trench and connects to the second first cable branch trench. The main cable trench is erected on the newly added pedestal beam between the prefabricated cabin foundations, the side wall of the first cable branch trench, and the pedestal at the cable entrance;

[0010] Lay the first and second cable branch trenches through the prefabricated cabin foundation, erect the first cable branch trench on the longitudinal pedestal beam of the prefabricated cabin foundation, and erect the second cable branch trench on the transverse pedestal beam of the prefabricated cabin foundation and the side wall of the first cable branch trench;

[0011] The top elevation of the newly added pedestal beam between the pedestal at the cable entrance and the prefabricated cabin foundation, the top elevation of the longitudinal pedestal beam of the prefabricated cabin foundation, and the top elevation of the transverse pedestal beam of the prefabricated cabin foundation shall be set according to the bottom elevation of the bottom plate of the main cable trench, the bottom elevation of the bottom plate of the first cable branch trench, and the bottom elevation of the bottom plate of the second cable branch trench;

[0012] The cable trench sidewall holes generated by the vertical intersection of the cable main trench and the first cable branch trench and the first cable branch trench and the second cable branch trench are reinforced.

[0013] As a preferred embodiment, the newly added pedestal beams between the prefabricated cabin foundations are formed by connecting and erecting the transverse pedestal beams of the prefabricated cabin foundations on both sides of the main cable trench laying path.

[0014] As a preferred embodiment, during the process of reinforcing the cable trench side wall holes produced by the vertical intersection of the main cable trench and the first cable branch trench and the first cable branch trench and the second cable branch trench, hidden beams and hidden column load-bearing structures are formed at the bottom and both sides of the cable trench side wall holes.

[0015] As a preferred embodiment, the cable trench side wall holes produced by the vertical intersection of the main cable trench and the first cable branch trench and the first cable branch trench and the second cable branch trench use the original lintel and the structured bottom beam and hole edge concealed column to form a new box beam section.

[0016] As a preferred embodiment, the second cable branch trench is erected on the transverse pedestal beam of the prefabricated cabin foundation and the side wall of the first cable branch trench, and the connection points are all located within the plane projection range of the prefabricated cabin foundation.

[0017] The present invention has the following beneficial effects:

[0018] 1. Through reasonable structural measures, a perfect force transmission path is formed to transfer the cable trench load to the pile foundation, solving the settlement problem of the cable trench itself and fundamentally solving the problem of uneven settlement of the cable trench;

[0019] 2. Low economic cost, high cost performance, no need for complicated structure, etc., a storage zone only needs to add a small amount of pedestal beams, a pedestal, a pile foundation, and a number of stirrups to achieve the perfect effect; BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall layout of the cable trench plane of the present invention;

[0021] Figure 2 This is a schematic diagram of the force transmission path connecting the first cable branch trench and the main trench of the present invention;

[0022] Figure 3 Schematic diagram of the force transmission path of the first cable branch trench and the second cable branch trench of the present invention;

[0023] Figure 4 Schematic diagram of the force transmission path of the second cable branch trench of the present invention;

[0024] Figure 5 Schematic diagram of the force transmission path of the main trench of the cable of the present invention;

[0025] Figure 6 This is a sample diagram of the cable trench side wall structure at the vertical intersection of the cable trenches of the present invention;

[0026] Figure 7 This is a schematic diagram of the overall layout of the cable trench in the prior art;

[0027] In the figure: 1-main cable trench; 11-side wall of main cable trench; 12-lintel of main cable trench; 13-bottom plate of main cable trench; 2-first branch cable trench; 21-side wall of first branch cable trench; 22-lintel of first branch cable trench; 23-bottom plate of first branch cable trench; 3-second branch cable trench; 31-side wall of second branch cable trench; 32-lintel of second branch cable trench; 33-bottom plate of second branch cable trench; 4-capping platform of prefabricated cabin foundation; 41-capping platform at cable entrance; 51-lateral support of prefabricated cabin foundation 52-Longitudinal pier beam for precast cabin foundation; 6-New pier beam for precast cabin; 7-Fire ring road for this section; 8-Pile foundation for precast cabin foundation; 81-Pile foundation at cable entrance; 9-Cable trench cover; 101-Horizontal distribution reinforcement at top of cable trench side wall; 102-Horizontal distribution reinforcement at bottom of cable trench side wall; 103-Newly added stirrups for concealed beam; 104-Blind beam at bottom of hole; 105-Vertical force reinforcement for side wall of cable trench; 106-Newly added stirrups for concealed column; 107-Blind column at hole edge; DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be understood that the step numbers used herein are only for convenience of description and are not intended to limit the order in which the steps are to be executed.

[0030] It should be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0032] The term "and / or" refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] Example 1:

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following will be combined with the specific embodiments of the present application and refer to the attached Figure 1 , clearly and completely describe the technical solution of the present invention.

[0035] To solve the problems of the prior art, the present invention proposes a cable trench arrangement method for an energy storage power station to prevent uneven settlement of the cable trench, which specifically includes the following steps:

[0036] Taking an energy storage partition as an example, the cable trench layout scheme adopted in this case is as follows Figure 1 : The main cable trench, the first cable branch trench and the second cable branch trench are all passed through the prefabricated cabin foundation. Combined with the elevation and reasonable structural structure, the loads of the main cable trench, the first cable branch trench and the second cable branch trench are all transferred to the pedestal, so as to use the pile foundation under the pedestal to solve the settlement problem of all cable trenches in the energy storage area.

[0037] The detailed plan is as follows:

[0038] like Figure 2 、 Figure 3 As shown, the first cable branch trench is erected on the longitudinal pedestal beam of the prefabricated cabin foundation. The top elevation of the longitudinal pedestal beam 52 of the prefabricated cabin foundation is adjusted according to the bottom elevation of the bottom plate 23 of the first cable branch trench, and the side wall 21 of the first cable branch trench is erected on multiple longitudinal pedestal beams 52 of the prefabricated cabin foundation. In this way, the load and deformation of the first cable branch trench can be transferred to the longitudinal pedestal beam 52 of the prefabricated cabin foundation, and then the original pedestal 4 of the prefabricated cabin foundation and the pile foundation 8 of the prefabricated cabin foundation can be used to control the settlement of the first cable branch trench. Among them, at the place where the main cable trench and the second cable branch trench are vertically intersected and cut off, considering the placement of the cover plate 9 of the cable trench, the lintel 22 of the first cable branch trench is still set below the cover plate 9 of the cable trench along the longitudinal direction of the first cable branch trench according to the original design of the cable trench.

[0039] like Figure 4 As shown, the second cable branch trench is constructed on the transverse pier beams of the prefabricated cabin foundation and the side walls of the first cable branch trench. The top elevation of the transverse pier beams 51 of the prefabricated cabin foundation is adjusted according to the bottom elevation of the second cable branch trench's floor 33, and the side walls 31 of the second cable branch trench are constructed on multiple transverse pier beams 51 of the prefabricated cabin foundation. This allows the load and deformation of the second cable branch trench to be transmitted to the transverse pier beams 51 of the prefabricated cabin foundation. At the point where the second cable branch trench is interrupted by the first cable branch trench, the load and deformation are transferred to the side walls 21 of the first cable branch trench and then to the longitudinal pier beams 52 of the prefabricated cabin foundation. This allows the settlement of the second cable branch trench to be controlled using the existing pier 4 and pile foundation 8 of the prefabricated cabin foundation. At the point where the second cable branch trench is perpendicularly interrupted by the first cable branch trench, to accommodate the placement of the cable trench cover plate 9, the second cable branch trench's lintel 32 is installed below the cable trench cover plate 9 along the longitudinal direction of the second cable branch trench, as per the original cable trench design.

[0040] like Figure 5As shown, the main cable trench is installed on the newly added pedestal beams between the prefabricated cabin foundations, the side walls of the first cable branch trench, and the pedestal at the cable entrance. The top elevations of the newly added pedestal beams 6 between the prefabricated cabin foundations and the pedestal 41 at the cable entrance are adjusted according to the bottom elevation of the main cable trench's floor 13. The side walls 11 of the main cable trench are installed on multiple newly added pedestal beams 6 between the prefabricated cabin foundations and the pedestal 41 at the cable entrance. In this way, most of the load and deformation of the main cable trench can be transferred to the newly added pedestal beams 6 between the prefabricated cabin foundations. At the point where it is interrupted by the second cable branch trench on the right, the load and deformation are transferred to the side walls 21 of the first cable branch trench and then to the longitudinal pedestal beams 52 of the prefabricated cabin foundation. The existing pedestal 4 and pile foundation 8 of the prefabricated cabin foundation can then be used to control the settlement of the main cable trench. At the cable entrance, the newly added pedestal 41 and pile foundation 81 at the cable entrance are used to control the settlement of the main cable trench. Among them, at the place where the first cable branch trench is vertically intersected and cut off, considering the placement of the cover plate 9 of the cable trench, the lintel 12 of the cable main trench is still set below the cover plate 9 of the cable trench along the longitudinal direction of the cable main trench according to the original design of the cable trench.

[0041] like Figure 6 As shown, the holes in the cable trench sidewalls caused by the vertical intersection of each cable trench are reinforced to ensure the stress integrity of the cable trench sidewalls. At the top of the hole, the cable trench lintel is set according to the original cable trench design. At the bottom of the hole, the existing horizontal distribution reinforcement 102 at the bottom of the cable trench sidewall and the newly added hidden beam stirrups 103 are used to form a hole bottom hidden beam 104 at the intersection of the bottom of the cable trench sidewall and the bottom plate. On both sides of the hole, the existing vertical force reinforcement 105 on the sidewalls of the cable trench and the newly added hidden column stirrups 106 are used to form hole side hidden columns 107 on both sides of the hole in the cable trench sidewalls. In this way, at the vertical intersection of each cable trench, the existing cable trench lintel, the newly constructed hole bottom hidden beam, and the hole side hidden columns are combined to form a new box beam section, which, combined with the sidewalls of the cable trench, ensures the stress integrity of the sidewalls.

[0042] At this point, only the cost of adding the pedestal 41 at the cable entrance, the pile foundation 81 at the cable entrance, several newly added pedestal beams 6 between the prefabricated cabin foundations, several newly added hidden beam stirrups 103 and newly added hidden column stirrups 106 is required to build a complete force transmission path for the main cable trench, the first cable branch trench and the second cable branch trench, and finally the pile foundation is used to control the settlement of the cable trench, thereby solving the problem of uneven settlement of the cable trench from the root.

[0043] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c or a and b and c, where a, b, c can be single or multiple.

[0044] Those skilled in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented using a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0045] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0046] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for arranging cable trenches in energy storage power stations to prevent uneven settlement of cable trenches, characterized in that: include: The main cable trench (1) is arranged between two adjacent prefabricated cabin foundations and passes through the first first cable branch trench (2) to be connected to the second first cable branch trench (2). The main cable trench (1) is erected on a pedestal beam (6) newly added between the prefabricated cabin foundations, a side wall (21) of the first cable branch trench, and a pedestal (41) at the cable entrance. Laying the first cable branch trench (2) and the second cable branch trench (3) through the prefabricated cabin foundation, erecting the first cable branch trench (2) on the longitudinal pedestal beam (52) of the prefabricated cabin foundation, and erecting the second cable branch trench (3) on the transverse pedestal beam (51) of the prefabricated cabin foundation and the side wall (21) of the first cable branch trench; The top elevation of the pedestal (41) at the cable entrance and the newly added pedestal beam (6) between the prefabricated cabin foundation, the top elevation of the longitudinal pedestal beam (52) of the prefabricated cabin foundation, and the top elevation of the transverse pedestal beam (51) of the prefabricated cabin foundation are set according to the bottom elevation of the bottom plate (13) of the cable main trench, the bottom elevation of the bottom plate (23) of the first cable branch trench, and the bottom elevation of the bottom plate (33) of the second cable branch trench; The cable trench sidewall holes generated by the vertical intersection of the cable main trench (1) and the first cable branch trench (2) and the first cable branch trench (2) and the second cable branch trench (3) are reinforced.

2. A cable trench arrangement method for energy storage power stations to prevent uneven settlement of cable trenches according to claim 1, characterized in that: The newly added pedestal beam (6) between the prefabricated cabin foundations is formed by connecting and erecting the transverse pedestal beams (51) of the prefabricated cabin foundations on both sides of the cable main trench (1) laying path.

3. The method for arranging cable trenches in energy storage power stations to prevent uneven settlement of cable trenches according to claim 1, characterized in that: During the process of reinforcing the cable trench sidewall holes generated by the vertical intersection of the main cable trench (1) and the first cable branch trench (2) and the first cable branch trench (2) and the second cable branch trench (3), hidden beam and column stress-bearing structures are formed at the bottom and both sides of the cable trench sidewall holes.

4. The method for arranging cable trenches in energy storage power stations to prevent uneven settlement of cable trenches according to claim 1, characterized in that: The cable trench sidewall holes generated by the vertical intersection of the main cable trench (1) and the first cable branch trench (2) and the first cable branch trench (2) and the second cable branch trench (3) are formed by utilizing the original lintel and the hole bottom hidden beam (104) and the hole side hidden column (107) formed by the structure to form a new box beam section.

5. The method for arranging cable trenches in energy storage power stations to prevent uneven settlement of cable trenches according to claim 1, characterized in that: The second cable branch trench (3) is installed on the transverse support beam (51) of the prefabricated cabin foundation and the side wall (21) of the first cable branch trench, and the connection points are all located within the projection range of the prefabricated cabin foundation plane.

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