Prefabricated cable trench and construction method

Abstract

The present invention relates to a prefabricated cable trench and a construction method, including side plates, a top plate and a bottom plate. The side plates include a first end and a second end which are oppositely arranged. The first end is provided with a first male tenon, and the second end is provided with a second male tenon. There are at least two side plates, and the two side plates are oppositely arranged. The two ends of the top plate are respectively connected to the two oppositely arranged side plates, and the end of the top plate is engaged with the first male tenon. The two ends of the bottom plate are respectively connected to the two oppositely arranged side plates, and the end of the bottom plate is engaged with the second male tenon. The prefabricated cable trench provided by this embodiment effectively prevents the damage to the original cable trench during the construction process, ensures the normal operation of the original cable trench, the construction steps are simple and easy to implement, and the construction efficiency is improved. In addition, the prefabricated cable trench provided by this embodiment is constructed step by step. First, the side plates are constructed, then the top plate is constructed, and finally the bottom plate is constructed. The construction steps are simple and easy to implement, and the construction difficulty is relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of power engineering construction, and particularly to a prefabricated cable trench and a construction method thereof. Background Art

[0002] During the renovation of an operating substation, it is inevitable that the newly built cable trench will cross the existing cable trench. The newly built cable trench often needs to pass through the bottom of the existing cable trench to meet the cable laying requirements. At the position where the routes of the newly built cable trench and the existing cable trench cross, there are the following several laying methods for the newly built cable trench: Method 1 is to bury a pipe body at the bottom of the existing cable trench. The pipe body passes through the bottom of the existing cable trench. After the cable is laid to the position of the existing cable trench, it is changed to be laid in the pipe body, and then it is laid along the newly built cable trench. However, the amount of buried pipe bodies is large (the buried area with the same cross-sectional area is much larger than the area of the cable trench), the excavation area at the bottom of the cable trench is large, the bearing stratum at the bottom of the existing cable trench is greatly disturbed, and the technical difficulty is high. Method 2 is to demolish part of the existing cable trench at the intersection of the newly built cable trench and the existing cable trench. After building a new cable trench at the bottom of the existing cable trench, the demolished part of the existing cable trench is restored to meet the power laying requirements. However, when the existing cable trench is demolished and rebuilt, the technical difficulty of protecting the existing cables is high, it is very difficult to perform live work, and the risk is relatively high. Summary of the Invention

[0003] Based on this, in view of the above technical problems, it is necessary to provide a prefabricated cable trench and a construction method thereof, which can effectively prevent the damage to the existing cable trench during the construction process, ensure the normal operation of the existing cable trench, the construction steps are simple and easy to implement, and the construction efficiency is improved.

[0004] A prefabricated cable trench, when the prefabricated cable trench crosses the existing cable trench, the prefabricated cable trench passes through the bottom of the existing cable trench. The prefabricated cable trench includes:

[0005] Side plates, the side plates include a first end and a second end arranged oppositely. The first end is provided with a first male tenon, the second end is provided with a second male tenon, and there are at least two side plates, and the two side plates are arranged oppositely;

[0006] A top plate, both ends of the top plate are respectively connected to the two oppositely arranged side plates, and the end of the top plate is engaged with the first male tenon;

[0007] A bottom plate, both ends of the bottom plate are respectively connected to the two oppositely arranged side plates, and the end of the bottom plate is engaged with the second male tenon.

[0008] The technical solution is further described below:

[0009] In one embodiment, the side plate further includes an abutting end and a jacking end that are oppositely arranged. The abutting end and the jacking end are both vertically connected to the first end and the second end. The abutting end is used to bear the force applied by the thrust device, and the jacking end is used to jack into the soil under the action of the thrust device.

[0010] In one embodiment, the jacking end is wedge-shaped or conical.

[0011] In one embodiment, the first tenon and the second tenon are coated with a protective layer.

[0012] In one embodiment, first connectors are pre-embedded in the first end and the second end of the side plate. The first connector at the first end is connected to the top plate, and the first connector at the second end is connected to the bottom plate; second connectors are pre-embedded in the top plate and the bottom plate. The second connector in the top plate is connected to the side plate, and the second connector in the bottom plate is connected to the side plate.

[0013] In one embodiment, the side plate, the top plate, and the bottom plate are all precast reinforced concrete plates.

[0014] An assembled cable trench construction method for constructing the assembled cable trench as described above includes the following steps:

[0015] Precast the side plate, the top plate, and the bottom plate, and pre-embed the first connectors in the side plate, and pre-embed the second connectors in the top plate and the bottom plate respectively;

[0016] Install the side plate at the bottom of the original cable trench by the jacking method;

[0017] Install the top plate at the first end of the side plate;

[0018] Install the bottom plate at the second end of the side plate.

[0019] In one embodiment, the step of installing the side plate at the bottom of the original cable trench by the jacking method specifically includes:

[0020] Excavate pits on both sides of the original cable trench;

[0021] Place the side plate in the pits, and apply force to the abutting end of the side plate using a thrust device, so that the jacking end of the side plate jacks into the soil at the bottom of the original cable trench.

[0022] In one embodiment, the step of installing the top plate at the first end of the side plate specifically includes:

[0023] Excavate the soil between the two oppositely arranged side plates that have been installed;

[0024] Both ends of the top plate are engaged with the first convex tenons of the side plates, the second connecting member of the top plate is connected to the first end of the side plates, and the first connecting member of the side plates is connected to the top plate.

[0025] In one embodiment, the step of installing the bottom plate at the second end of the side plates specifically includes:

[0026] Excavate the soil between the two relatively arranged side plates that have been installed;

[0027] Both ends of the bottom plate are engaged with the second convex tenons of the side plates, the second connecting member of the bottom plate is connected to the second end of the side plates, and the first connecting member of the side plates is connected to the bottom plate.

[0028] The above-mentioned prefabricated cable trench and construction method have at least the following beneficial effects:

[0029] (1) In the prefabricated cable trench provided in this embodiment, the side plates are provided with the first convex tenons and the second convex tenons. The first convex tenons and the second convex tenons play a role in temporarily supporting the top plate and the bottom plate, facilitating the subsequent installation of the top plate and the bottom plate between the two side plates. In addition, the top plate and the bottom plate are respectively engaged with the first convex tenons and the second convex tenons, so that the top plate and the bottom plate can be fixed on the side plates, and the operation is simple and convenient.

[0030] (2) In the prefabricated cable trench provided in this embodiment, the side plates are constructed by the jacking method. The jacking end of the side plate is used to bear the force applied by the thrust device, and the jacking end of the side plate is used to jack into the soil under the action of the thrust device. In this way, when constructing the side plates, there is no need to excavate the soil at the bottom of the original cable trench. The constructed side plates can be used as the supporting members of the original cable trench, so that the bottom of the original cable trench is suspended and exposed for a short time, effectively preventing damage to the original cable trench during the construction process and ensuring the normal operation of the original cable trench.

[0031] (3) The side plates, top plates, and bottom plates of the prefabricated cable trench provided in this embodiment are all prefabricated, which is convenient for on-site installation, greatly shortening the construction time and being beneficial to improving the construction efficiency. In addition, the prefabricated cable trench provided in this embodiment is constructed step by step. First, the side plates are constructed, then the top plate is constructed, and finally the bottom plate is constructed. The construction steps are simple and easy to implement, and the construction difficulty is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a prefabricated cable trench provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the side plate of a prefabricated cable trench provided by an embodiment of the present invention;

[0034] Figure 3 is Figure 2 A schematic structural diagram of the side plate shown from another angle;

[0035] Figure 4 is Figure 3 Schematic cross-sectional structure diagram along line A-A;

[0036] Figure 5 Schematic structure diagram of the assembly of the side plate, top plate and bottom plate provided by an embodiment of the present invention;

[0037] Figure 6 Schematic structure diagram of the installation of the side plate provided by an embodiment of the present invention;

[0038] Figure 7 Schematic structure diagram of the installation of the top plate provided by an embodiment of the present invention;

[0039] Figure 8 Schematic structure diagram of the installation of the bottom plate provided by an embodiment of the present invention.

[0040] Explanation of reference numerals: 100, side plate; 110, first end; 111, first tenon; 120, second end; 121, second tenon; 130, pressing end; 140, pushing end; 150, first connecting member; 200, top plate; 210, second connecting member; 300, bottom plate; 400, angle steel; 500, original cable trench. Detailed implementation manners

[0041] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0044] This embodiment provides a prefabricated cable trench, which has the advantages of effectively preventing damage to the original cable trench during construction, ensuring the normal operation of the original cable trench, simple and easy construction steps, and improving construction efficiency. The following will be described in detail with reference to the drawings.

[0045] In one embodiment, please refer to Figure 1 and Figure 2 , a prefabricated cable trench. When the prefabricated cable trench intersects with the original cable trench 500, the prefabricated cable trench is arranged to pass through the bottom of the original cable trench 500. The prefabricated cable trench specifically includes side plates 100, a top plate 200, and a bottom plate 300. The side plates 100 include a first end 110 and a second end 120 which are oppositely arranged. The first end 110 is provided with a first male tenon 111, and the second end 120 is provided with a second male tenon 121. At least two side plates 100 are included, and the two side plates 100 are oppositely arranged. The two ends of the top plate 200 are respectively connected to the two oppositely arranged side plates 100, and the end of the top plate 200 is engaged with the first male tenon 111. The two ends of the bottom plate 300 are respectively connected to the two oppositely arranged side plates 100, and the end of the bottom plate 300 is engaged with the second male tenon 121. The fact that the prefabricated cable trench is arranged to pass through the bottom of the original cable trench 500 means that the prefabricated cable trench is laid under the original cable trench 500.

[0046] During the process of reconstructing an operating substation, it is inevitable that the newly built cable trench will cross the existing cable trench 500, and the newly built cable trench often needs to pass through the bottom of the existing cable trench 500 to meet the cable laying requirements. At the position where the routes of the new cable trench and the existing cable trench 500 cross, there are several traditional laying methods as follows: Method 1 is to bury a pipe body at the bottom of the existing cable trench 500. The pipe body passes through the bottom of the original cable trench. After the cable is laid to the position of the existing cable trench 500, it is changed to be laid through the pipe body, and then laid along the newly built cable trench. However, the amount of buried pipe bodies is large (the buried area with the same cross-sectional area is much larger than the area of the cable trench), the excavation area at the bottom of the cable trench is large, the bearing stratum at the bottom of the existing cable trench 500 is greatly disturbed, and the technical difficulty is high. Method 2 is to demolish part of the existing cable trench 500 at the intersection of the newly built cable trench and the existing cable trench 500. After building a new cable trench at the bottom of the existing cable trench 500, the demolished part of the existing cable trench 500 is restored to meet the power laying requirements. However, the technical difficulty of protecting the original cables during the demolition and reconstruction of the existing cable trench 500 is high, it is very difficult to carry out live work, and the risk is relatively high.

[0047] However, referring to Figures 1 to 3 , the construction difficulty of the prefabricated cable trench provided in this embodiment is small and it is not necessary to demolish the existing cable trench 500. Specifically, the prefabricated cable trench provided in this embodiment passes through the bottom of the existing cable trench 500, and first tenons 111 and second tenons 121 are provided on its side plates 100. The first tenons 111 and the second tenons 121 play a role in temporarily supporting the top plate 200 and the bottom plate 300, which is beneficial to reducing the damage to the cable trench and also facilitates the subsequent installation of the top plate 200 and the bottom plate 300. In addition, the top plate 200 and the bottom plate 300 are respectively engaged with the first tenons 111 and the second tenons 121, so that the top plate 200 and the bottom plate 300 can be fixed on the side plates 100, and the operation is simple and convenient.

[0048] In one embodiment, please refer to Figures 2 to 4, the side plate 100 further includes an abutting end 130 and a jacking end 140 which are oppositely arranged. The abutting end 130 and the jacking end 140 are both vertically connected to the first end 110 and the second end 120. The abutting end 130 is used to bear the force applied by the thrust device, and the jacking end 140 is used to jack into the soil under the action of the thrust device. Specifically, the thrust device can be a jack. During the installation process of the side plate 100, the jack abuts against the abutting end 130, and the abutting end 130 is stressed. This force is transmitted to the jacking end 140 to push the jacking end 140 to move towards the soil inside the bottom of the original cable trench 500 until the side plate 100 reaches a suitable installation position. The jacking end 140 is designed in a shape such as a wedge or a cone that is convenient for drilling, which facilitates the side plate 100 to be pushed into the soil. The fabricated cable trench side plate 100 provided in this embodiment is constructed by the jacking method. The abutting end 130 of the side plate 100 is used to bear the force applied by the thrust device, and the jacking end 140 of the side plate 100 is used to jack into the soil under the action of the thrust device. In this way, when constructing the side plate 100, it is not necessary to excavate the soil at the bottom of the original cable trench 500. The constructed side plate 100 can be used as a supporting member for the original cable trench 500, so that the bottom of the original cable trench 500 is suspended and exposed for a short time, effectively preventing damage to the original cable trench 500 during the construction process and ensuring the normal operation of the original cable trench 500.

[0049] Furthermore, the first tenon 111 and the second tenon 121 are coated with a protective layer (not shown). Specifically, the protective layer can be a steel sheet. Wrapping the first tenon 111 and the second tenon 121 with a steel sheet can effectively prevent the first tenon 111 and the second tenon 121 from being damaged due to collision. It can be understood that in addition to being a steel sheet, the protective layer can also be made of other materials with higher hardness.

[0050] In one embodiment, please refer to Figures 2 to 5, a first connector 150 is embedded in the first end 110 and the second end 120 of the side plate 100, the first connector 150 of the first end 110 is connected to the top plate 200, and the first connector 150 of the second end 120 is connected to the bottom plate 300; a second connector 210 is embedded in the top plate 200 and the bottom plate 300, the second connector 210 in the top plate 200 is connected to the side plate 100, and the second connector 210 in the bottom plate 300 is connected to the side plate 100. Specifically, the first connector 150 and the second connector 210 are both threaded sleeves. Angle steel 400 is provided at the connection between the top plate 200 and the side plate 100 and at the connection between the bottom plate 300 and the side plate 100. When the first cams 111 of the top plate 200 and the side plate 100 are engaged and fixed, the angle steel 400 at the connection between the top plate 200 and the side plate 100 is screwed and connected with the threaded sleeve in the top plate 200, and the angle steel 400 at the connection between the top plate 200 and the side plate 100 is also screwed and connected with the threaded sleeve in the first end 110, so that the top plate 200 and the side plate 100 are further fixed together. Similarly, when the second cams 121 of the bottom plate 300 and the side plate 100 are engaged and fixed, the angle steel 400 at the connection between the bottom plate 300 and the side plate 100 is screwed and connected with the threaded sleeve in the bottom plate 300, and the angle steel 400 at the connection between the bottom plate 300 and the side plate 100 is also screwed and connected with the threaded sleeve in the second end 120, so that the bottom plate 300 and the side plate 100 are further fixed together. The side panels 100 and the top panel 200, and the side panels 100 and the bottom panel 300 are all fixed by screw connection, which is conducive to simplifying the installation steps and is convenient and quick to install. It is understandable that in addition to the above-mentioned screw connection, the side panels 100 and the top panel 200, and the side panels 100 and the bottom panel 300 can also be connected by clamping, riveting, etc., which are not specifically limited here.

[0051] In one embodiment, the side panels 100, the top panel 200 and the bottom panel 300 are prefabricated reinforced concrete panels. In this way, they can be directly installed on site without the need for on-site pouring and other steps, which greatly shortens the construction time and helps improve construction efficiency.

[0052] In one embodiment, a method for constructing an assembled cable trench is provided, wherein the assembled cable trench described in the above embodiment is used for installation, and the assembled cable trench construction comprises the following steps:

[0053] Step S1, prefabricating the side panels 100, the top panel 200 and the bottom panel 300, and pre-embedding the first connecting member 150 in the side panel 100, and pre-embedding the second connecting member 210 in the top panel 200 and the bottom panel 300 respectively;

[0054] Step S2, installing the side plate 100 at the bottom of the original cable trench 500 by using the jacking method;

[0055] Step S3, installing the top plate 200 on the first end 110 of the side plate 100;

[0056] Step S4 , installing the bottom plate 300 on the second end 120 of the side plate 100 .

[0057] In the construction method of the assembled cable trench, the side panels 100, the top panel 200, and the bottom panel 300 of the assembled cable trench are all prefabricated, and the on-site installation is convenient, which greatly shortens the construction time and is conducive to improving the construction efficiency. In addition, the assembled cable trench provided in this embodiment is constructed in steps, first constructing the side panels 100, then constructing the top panel 200, and finally constructing the bottom panel 300. The construction steps are simple and easy, and the construction difficulty is relatively low.

[0058] In step S2, the step of installing the side plate 100 at the bottom of the original cable trench 500 by using the jacking method specifically includes:

[0059] Step S21, excavate pits on both sides of the original cable trench 500. Specifically, the width of the pit needs to be determined according to the width of the newly built assembled cable trench and the construction equipment, and the depth of the pit is determined according to the height of the side plate 100 to ensure that the side plate 100 can be accommodated in the pit.

[0060] Step S22: Refer to Figure 6 , place the side plate 100 in the pit, and use the thrust equipment to apply force to the top pressure end 130 of the side plate 100, so that the jacking end 140 of the side plate 100 is pushed toward the soil at the bottom of the original cable trench 500. Specifically, during the installation of the side plate 100, the jack supports the top pressure end 130, and the top pressure end 130 is subjected to force. The force is transmitted to the jacking end 140 to push the jacking end 140 toward the soil at the bottom of the original cable trench 500 until the side plate 100 reaches a suitable installation position. The jacking end 140 is designed to be a wedge or cone shape that is convenient for drilling, so that the side plate 100 can be pushed into the soil. The assembled cable trench side plate 100 is constructed by the jacking method. The top pressure end 130 of the side plate 100 is used to withstand the force applied by the thrust equipment, and the jacking end 140 of the side plate 100 is used to push into the soil under the action of the thrust equipment. In this way, there is no need to excavate the soil at the bottom of the original cable trench 500 when constructing the side plate 100. The completed side plate 100 can be used as a supporting component of the original cable trench 500, so that the bottom of the original cable trench 500 is suspended and exposed for a shorter time, which effectively prevents damage to the original cable trench 500 during the construction process and ensures that the original cable trench 500 can operate normally.

[0061] Step S3, the step of installing the top plate 200 on the first end 110 of the side plate 100, specifically includes:

[0062] Step S31: dig out the soil between the two installed side plates 100. Figure 7, when excavating the soil at the location for installing the top plate 200, the already installed side plates 100 can serve as the supporting members for the original cable trench 500, such that the bottom of the original cable trench 500 is suspended and exposed for a relatively short time. During this process, steps such as formwork support are not required, and the soil can be directly excavated without the original cable trench 500 collapsing, effectively preventing damage to the original cable trench 500 during construction, ensuring the normal operation of the original cable trench 500, and also facilitating the reduction of construction steps such as formwork support, thereby improving construction efficiency.

[0063] Step S32: The two ends of the top plate 200 are engaged with the first tenons 111 of the side plates 100. Connect the second connecting member 210 of the top plate 200 to the first end 110 of the side plate 100, and connect the first connecting member 150 of the side plate 100 to the top plate 200. Specifically, in this step, both the first connecting member 150 and the second connecting member 210 are threaded sleeves. First, engage the top plate 200 with the first tenons 111 to preliminarily fix the top plate 200 and the side plates 100. Further, angle steels 400 are provided at the joints between the top plate 200 and the side plates 100 as well as at the joints between the bottom plate 300 and the side plates 100. After the top plate 200 and the first tenons 111 of the side plates 100 are engaged and fixed, the angle steel 400 at the joint between the top plate 200 and the side plates 100 is screwed to the threaded sleeve inside the top plate 200, and the angle steel 400 at the joint between the top plate 200 and the side plates 100 is also screwed to the threaded sleeve inside the first end 110, further fixing the top plate 200 and the side plates 100 together. The side plates 100 are fixed to the top plate 200 and the bottom plate 300 by screwing, which is conducive to simplifying the installation steps and enabling convenient and fast installation. It can be understood that, in addition to the above-mentioned screwing connection method, the side plates 100 and the top plate 200 can also adopt connection methods such as snap connection and riveting, which are not specifically limited herein.

[0064] Further, the threaded sleeves inside the first end 110 of the side plates 100 and the threaded sleeves inside the top plate 200 are arranged in one-to-one correspondence, and the threaded sleeves inside the second end 120 of the side plates 100 and the threaded sleeves inside the bottom plate 300 are arranged in one-to-one correspondence. Further, a threaded sleeve is provided every 300 mm or 400 mm at the first end 110 of the side plates 100. Similarly, the spacing distance of the threaded sleeves on the top plate 200 and the bottom plate 300 is equal to the spacing distance of the threaded sleeves at the first end 110.

[0065] Step S4: The step of installing the bottom plate 300 at the second end 120 of the side plates 100 specifically includes:

[0066] Step S41: Excavate the soil between the two relatively arranged side plates 100 that have been installed. Specifically, refer to Figure 8, when excavating the soil at the location for installing the bottom plate 300, the already installed side plates 100 and the top plate 200 can both serve as support members for the original cable trench 500, such that the bottom of the original cable trench 500 is suspended and exposed for a short time, preventing damage to the original cable trench 500 caused by excessive excavation range. During this process, steps such as formwork support are not required, and the soil can be directly excavated, and the original cable trench 500 will not collapse, effectively preventing damage to the original cable trench 500 during construction, ensuring that the original cable trench 500 can operate normally, and also being beneficial to reducing construction steps such as formwork support and improving construction efficiency.

[0067] Step S42: The two ends of the bottom plate 300 are engaged with the second male tenons 121 of the side plates 100, connect the second connecting member 210 of the bottom plate 300 to the second end 120 of the side plate 100, and connect the first connecting member 150 of the side plate 100 to the bottom plate 300. Specifically, in this step, both the first connecting member 150 and the second connecting member 210 are threaded sleeves. First, engage the bottom plate 300 and the second male tenons 121 to preliminarily fix the top plate 200 and the side plates 100. Further, angle steels 400 are provided at the connection between the bottom plate 300 and the side plates 100 and at the connection between the bottom plate 300 and the side plates 100. When the first male tenons 111 of the bottom plate 300 and the side plates 100 are engaged and fixed, the angle steel 400 at the connection between the bottom plate 300 and the side plates 100 is screwed and connected to the threaded sleeve inside the bottom plate 300, and the angle steel 400 at the connection between the bottom plate 300 and the side plates 100 is also screwed and connected to the threaded sleeve inside the second end 120, such that the bottom plate 300 and the side plates 100 are further fixed together. The side plates 100 and the bottom plate 300 are fixed by a screwing connection method, which is beneficial to simplifying the installation steps and is convenient and fast for installation. It can be understood that in addition to the above-mentioned screwing connection method, the side plates 100 and the bottom plate 300 can also adopt connection methods such as snap connection and riveting, which are not specifically limited herein.

[0068] The side plates 100 of the prefabricated cable trench provided in this embodiment are provided with first male tenons 111 and second male tenons 121, and the first male tenons 111 and the second male tenons 121 play a role of temporarily supporting the top plate 200 and the bottom plate 300, facilitating the subsequent installation of the top plate 200 and the bottom plate 300 between the two side plates 100. In addition, the top plate 200 and the bottom plate 300 are respectively engaged with the first male tenons 111 and the second male tenons 121, and the top plate 200 and the bottom plate 300 can be fixed on the side plates 100, and the operation is simple and convenient.

[0069] In addition, the side plate 100 of the prefabricated cable trench is constructed by the jacking method. The jacking end 130 of the side plate 100 is used to bear the force applied by the thrust device, and the jacking end 140 of the side plate 100 is used to jack into the soil under the action of the thrust device. In this way, when constructing the side plate 100, it is not necessary to excavate the soil at the bottom of the original cable trench 500. The constructed side plate 100 can be used as a supporting member for the original cable trench 500, so that the bottom of the original cable trench 500 is suspended and exposed for a short time, effectively preventing damage to the original cable trench 500 during the construction process and ensuring the normal operation of the original cable trench 500.

[0070] In addition, the side plate 100, the top plate 200, and the bottom plate 300 of the prefabricated cable trench provided in this embodiment are all prefabricated, which is convenient for on-site installation, greatly shortening the construction time and being beneficial to improving the construction efficiency. In addition, the prefabricated cable trench provided in this embodiment is constructed step by step. First, the side plate 100 is constructed, then the top plate 200 is constructed, and finally the bottom plate 300 is constructed. The construction steps are simple and easy to implement, and the construction difficulty is relatively low.

[0071] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0072] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A construction method for an assembled cable trench, characterized in that, When the prefabricated cable trench intersects with the existing cable trench, the prefabricated cable trench penetrates through the bottom of the existing cable trench; the prefabricated cable trench includes: Side plates, the side plates include a first end and a second end arranged oppositely, the first end is provided with a first male tenon, the second end is provided with a second male tenon, at least two side plates are included, and the two side plates are arranged oppositely; A top plate, both ends of the top plate are respectively connected to the two oppositely arranged side plates, and the end of the top plate is engaged with the first male tenon; A bottom plate, both ends of the bottom plate are respectively connected to the two oppositely arranged side plates, and the end of the bottom plate is engaged with the second male tenon; The construction method of the prefabricated cable trench includes the following steps: Prefabricate side plates, a top plate and a bottom plate, and embed a first connecting piece in the side plates, and embed second connecting pieces in the top plate and the bottom plate respectively; Install the side plates at the bottom of the existing cable trench by the pipe jacking method; Install the top plate at the first end of the side plate; Install the bottom plate at the second end of the side plate.

2. The prefabricated cable trench construction method according to claim 1, wherein, The side plate further includes a jacking pressure end and a jacking end arranged oppositely, the jacking pressure end and the jacking end are both vertically connected to the first end and the second end, the jacking pressure end is used to bear the force applied by the thrust device, and the jacking end is used to jack into the soil under the action of the thrust device.

3. The construction method of the prefabricated cable trench according to claim 2, characterized in that, The jacking end is wedge-shaped or conical.

4. The prefabricated cable trench construction method according to any one of claims 1 to 3, characterized in that The first male tenon and the second male tenon are coated with a protective layer.

5. The construction method of the prefabricated cable trench according to any one of claims 1 to 3, characterized in that, A first connecting piece is embedded in the first end and the second end of the side plate, the first connecting piece at the first end is connected to the top plate, and the first connecting piece at the second end is connected to the bottom plate; A second connecting piece is embedded in the top plate and the bottom plate, the second connecting piece in the top plate is connected to the side plate, and the second connecting piece in the bottom plate is connected to the side plate.

6. The construction method of the prefabricated cable trench according to any one of claims 1 to 3, characterized in that, The side plates, the top plate and the bottom plate are all precast reinforced concrete plates.

7. The construction method of the prefabricated cable trench according to claim 1, characterized in that, The step of installing the side plates at the bottom of the existing cable trench by the pipe jacking method specifically includes: Excavate pits on both sides of the existing cable trench; Place the side plates in the pits, and apply force to the jacking pressure end of the side plates by using a thrust device, so that the jacking end of the side plates jacks into the soil at the bottom of the existing cable trench.

8. The construction method of the prefabricated cable trench according to claim 1, characterized in that The step of installing the top plate at the first end of the side plate specifically includes: Excavate the soil between the two oppositely arranged side plates that have been installed; Both ends of the top plate are engaged with the first male tenons of the side plates, connect the second connecting piece of the top plate to the first end of the side plate, and connect the first connecting piece of the side plate to the top plate.

9. The construction method of the prefabricated cable trench according to claim 1, characterized in that, The step of installing the bottom plate at the second end of the side plate specifically includes: Excavate the soil between the two oppositely arranged side plates that have been installed; Both ends of the bottom plate are engaged with the second male tenons of the side plates, connect the second connecting piece of the bottom plate to the second end of the side plate, and connect the first connecting piece of the side plate to the bottom plate.

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