Construction method of simple installation device for embedded parts in side wall of exposed concrete cable trench

Abstract

The present invention discloses a simple installation device and construction method for embedded parts in the side walls of a clear water concrete cable trench. The device includes a reaction support, and a plurality of pairs of adjustable end plates are correspondingly provided at both ends of the reaction support. The method includes the following steps: first, completing the steel bar binding of the bottom plate and the side wall of the cable trench, and then pre-embedding the integrated embedded parts on the steel bars of the side wall. After the integrated embedded parts are pre-embedded, formwork is laid on the bottom plate and the side wall of the cable trench. The present invention utilizes the principle of prestressing and adopts tensioning fasteners to tension and fix the integrated embedded parts, so that the integrated embedded parts do not deviate during the pouring process; thereby, the integrated embedded parts are installed flat, positioned accurately, and formed in one step after the formwork is removed, further realizing the clear water pouring process of the cable trench, and making full use of on-site construction tools. Not only is the aesthetics high, but the operation and installation are also simpler, which greatly improves construction efficiency and saves material and labor costs.

Description

Technical Field

[0001] The invention relates to the technical field of substation cable laying, in particular to a construction method of a simple installation device for embedded parts in a side wall of a plain concrete cable trench. Background Art

[0002] In existing power transmission and transformation projects, cable trench structures are widely used and essential in substations, primarily for cable laying. Cable supports are typically welded to pre-embedded components on the trench sidewalls, and the cables are then supported on these supports. Exposed concrete structures are cast-in-place concrete structures. After the formwork is removed, the wall surface is smooth and flat, requiring no surface plastering. Embedded components consist of steel plates and anchor bars. The anchor bars connect the embedded components to the cast-in-place concrete structure, and the embedded steel plates connect them to other steel components, such as cable supports. These components typically include block-type embedded components and full-length flat iron embedded components. During cable trench construction, expansion joints are typically installed every 15-20 meters, with a width of approximately 10-20 mm. Hereinafter, this 15-20 meter section of cable trench will be referred to as a "cable trench segment."

[0003] Currently, most cable trenches in substations are still constructed with cast-in-place concrete. Embedded parts in the sidewalls of these trenches must be fixed to the reinforcement after the sidewall formwork is installed and before concrete is poured. After concrete pouring, the surface of the embedded parts often does not fit tightly against the sidewall formwork. After the formwork is removed, the dynamics of pouring concrete and the fluidity of the concrete cause the embedded parts to shift with the weaker reinforcement during the concrete vibrating process. This causes the surface of the embedded parts to become submerged in the concrete, while the exposed parts become uneven and rotate around their center. When welding and installing cable supports, construction workers must locate the embedded parts submerged in the trench sidewalls and tap the concrete sidewalls with a hammer to expose them. This results in uneven, rough, and even pitted surfaces on the sidewalls, creating an unsightly appearance and increasing the workload, hindering construction progress.

[0004] Those skilled in the art are dedicated to solving the above technical deficiencies. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical purpose of the present invention is to solve the problem that most of the cable trenches in the current substations are still mainly cast-in-place concrete structures, which results in the surface of the embedded parts not being able to fit with the side wall formwork, and thus the embedded parts exposed on the side wall surface appearing uneven and the surface of the embedded parts rotating around the center of the embedded parts, which is not only unsightly but also affects the construction progress.

[0006] In order to achieve the above technical objectives, the present invention provides a simple installation device for embedded parts in the side wall of a plain concrete cable trench, including a reaction support, and several pairs of adjustable end plates are correspondingly provided at both ends of the reaction support, and each of the two ends of the adjustable end plate is respectively provided with a tensioning fastener, and each of the tensioning fasteners is connected to one end of an integrated embedded part embedded in the side wall of the cable trench.

[0007] Preferably, the reaction force bracket is a bracket with a rectangular structure formed by connecting and combining a plurality of cross bars and vertical bars.

[0008] Preferably, the adjustable end plate is connected to the end upright of the reaction support via an end plate fastener, and the adjustable end plate has a longitudinal adjustment function.

[0009] Preferably, an end plate fastening hole is reserved on the adjustable end plate, and the end plate fastener is a U-shaped structure. The end plate fastener wraps the ends of the end uprights of the reaction support, passes through the end plate fastening hole and is fixed by a nut.

[0010] Preferably, a tensioning and fastening hole is reserved on the adjustable end plate, and a hanging hole is reserved on the end of the integrated embedded part. One end of the tensioning fastener is a hook structure and is hung in the hanging hole, and the other end of the tensioning fastener is a screw structure that passes through the tensioning and fastening hole and is fixed by a nut.

[0011] Preferably, one of the integrated embedded parts is a full-length embedded part that is continuous with the side wall of the cable trench.

[0012] Preferably, one of the integrated embedded parts is composed of a plurality of block embedded parts and a fixing rib, and the plurality of block embedded parts are arranged along the length direction of the side wall of the cable trench and connected into a whole by the fixing rib.

[0013] The present invention also provides a construction method for the above-mentioned simple installation device for embedded parts in the side wall of a clear concrete cable trench, comprising the following steps:

[0014] Step 1: First, complete the steel bar binding of the cable trench bottom plate and side wall, and then embed the integrated embedded parts on the steel bars of the side wall. After the integrated embedded parts are embedded, lay the template on the cable trench bottom plate and side wall;

[0015] Step 2: Then, install the reaction support. Install the adjustable end plates corresponding to the vertical rods at both ends of the reaction support and fix them with end plate fasteners;

[0016] Step 3: Next, adjust the height of the adjustable end plate to be consistent with the height of the corresponding pair of integrated embedded parts, and then keep the force directions of the tension fasteners, the hanging holes of the integrated embedded parts, and the tension fastening holes of the adjustable end plate consistent, install the tension fasteners one by one and tighten the nuts on the tension fasteners;

[0017] Step 4. Finally, pour concrete in the formwork. After the concrete pouring is completed and reaches the designed strength, gradually remove the tensioning fasteners, adjustable end plates, reaction supports and formwork.

[0018] Preferably, in the above step three, the one-piece embedded part is tightened and pressed against the side surface of the formwork, and the nut on the tensioning fastener is tightened.

[0019] Preferably, in the above step 4, the concrete is plain concrete.

[0020] Preferably, after the above step 4 is completed, a cable bracket is set up on the integrated embedded part, and then the cable is laid on the cable bracket.

[0021] Beneficial effects of the present invention:

[0022] Due to the above-mentioned design, the present invention utilizes the prestressed principle and adopts tensioning fasteners to tension and fix the integrated embedded parts, so that the integrated embedded parts will not deviate during the casting process, ensuring that the surface of the integrated embedded parts and the side wall template surface can fit closely; thereby, the integrated embedded parts are installed flat, positioned accurately, and formed in one step after the template is removed, further realizing the cable trench clean water casting process, and can make full use of on-site construction tools, which is not only more beautiful, but also easier to operate and install, greatly improving construction efficiency, saving materials and labor costs.

[0023] In summary, compared with the prior art, the implementation of the present invention is easier to install and operate, fully utilizes construction site tools, saves construction time, and reduces labor costs and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 Schematic diagram of the planar structure of one end portion of the reaction support in the present invention;

[0026] Figure 3 Schematic diagram of the three-dimensional structure of the reaction support part of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the adjustable end plate, tensioning fastener and end plate fastener in the present invention;

[0028] Figure 5 Schematic diagram of the structure of the adjustable end plate, tensioning fastener and end plate fastener in the present invention;

[0029] Figure 6 This is a structural diagram of the embedded parts of the present invention using block-type embedded parts;

[0030] Figure 7 This is a structural diagram of the block-type embedded parts of the present invention connected by fixed ribs;

[0031] Figure 8 This is a schematic structural diagram of the embedded parts of the present invention using full-length embedded parts;

[0032] Figure 9 It is a structural schematic diagram of the cast-in-situ concrete, full-length embedded parts and casting template of the present invention.

[0033] In the figure: 1 concrete, 2 block embedded parts, 3 full-length embedded parts, 3a formwork, 4 reaction support, 5 adjustable end plate, 6 tensioning fasteners, 7 end plate fasteners, 8 fixing reinforcement. DETAILED DESCRIPTION

[0034] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0035] Example:

[0036] like Figures 1-9 As shown, a simple installation device for embedded parts in the side wall of a plain concrete cable trench includes a reaction support 4, and a plurality of pairs of adjustable end plates 5 are correspondingly provided at both ends of the reaction support 4. The two ends of each adjustable end plate 5 are respectively provided with tensioning fasteners 6, and each tensioning fastener 6 is connected to one end of an integrated embedded part embedded in the side wall of the cable trench.

[0037] Specifically, for the integrated embedded part being a full-length embedded part 3, the reaction support 4 is an independent stable frame, with adjustable end plates 5 installed at both ends thereof, and the adjustable end plates 5 can be moved up and down by end plate fasteners 7 to adapt to the installation of the integrated embedded part at different positions of the side wall of the cable trench; tensioning fastening holes are provided at both ends of the adjustable end plate 5 for passing through the tensioning fasteners 6; the tensioning fasteners 6 are connected to the reserved hanging holes at the ends of the integrated embedded parts and pass through the tensioning fastening holes of the adjustable end plates 5; by tightening the nuts at the ends of the tensioning fasteners 6 at both ends of the cable trench section to be cast (15 to 20 m), and providing reaction force through the reaction support 4 and the adjustable end plates 5 of the stable frame, the integrated embedded part is tensioned and fits the surface of the template 3a.

[0038] Specifically, the integrated embedded parts are composed of several block embedded parts 2 and a fixed rib 8. The functions of the reaction bracket 4, the adjustable end plate 5, the tensioning fastener 6, and the end plate fastener 7 are the same as the installation process of the full-length embedded parts 3. Two fixed ribs 8 are usually provided to integrate the block embedded parts 2 evenly distributed on the cable trench section to form a similar full-length embedded part 3, which is convenient for overall tensioning so that all block embedded parts 2 fit the template 3a board surface.

[0039] Specifically, the adjustable end plate 5 is a steel plate of a certain thickness. Since its two ends are cantilevered components relative to the reaction support 4, in order to prevent the adjustable end plate 5 from deforming during the tensioning process, the adjustable end plate 5 needs to have a certain thickness to provide a larger tensioning force, so that the integrated embedded parts are tensioned and fit the surface of the template 3a; end plate fastening holes are reserved on the adjustable end plate 5, and the end plate fasteners 7 are U-shaped structures. The end plate fasteners 7 wrap the end vertical rods of the reaction support 4, pass through the end plate fastening holes and are fixed by nuts.

[0040] Specifically, a tensioning and fastening hole is reserved on the adjustable end plate 5, and a hanging hole is reserved at the end of the integrated embedded part. One end of the tensioning fastener 6 is a hook structure and is hung in the hanging hole, and the other end of the tensioning fastener 6 is a screw structure that passes through the tensioning and fastening hole and is fixed by a nut. The tensioning fastener 6 is a connecting part with a certain rigidity, one end of which is an openable and closable ring, which is connected to the hanging hole reserved for the integrated embedded part, and one end is provided with a screw, which can pass through the tensioning and fastening holes at both ends of the adjustable end plate 5 and be tightened by a nut; the tensioning fastener 6, the integrated embedded part, and the end holes of the adjustable end plate 5 need to be in the same force direction to ensure that the integrated embedded part does not flip over when the tensioning is applied to the integrated embedded part.

[0041] Specifically, the fixed rib 8 uses threaded steel bars with a smaller diameter of 8 to 10, which are spot-welded to each block-type embedded part 2. A thread is set at the end of the fixed rib 8, and two tensioning fixing holes are reserved at the end of the adjustable end plate 5. A sleeve for mechanical connection of steel bars is used to connect and tighten the steel bar thread passing through the adjustable end plate 5.

[0042] The present invention provides a construction method for a simple installation device for embedded parts in a side wall of a clear concrete cable trench, comprising the following steps:

[0043] Step 1: First, complete the steel bar binding of the cable trench bottom plate and side wall, and then embed the integrated embedded parts on the steel bars of the side wall. After the integrated embedded parts are embedded, lay the template 3a on the cable trench bottom plate and side wall;

[0044] Step 2: Then, install the reaction support 4, which is connected by steel pipes and fasteners used for scaffolding on the construction site; set pads at the contact points between the vertical steel pipes of the reaction support 4 and the bottom plate of the cable trench; according to the horizontal number and position of the side walls of the cable trench, install adjustable end plates 5 with end plate fastening holes and tensioning fastening holes corresponding to the vertical poles at both ends of the reaction support 4, and fix the adjustable end plates 5 with end plate fastening holes by end plate fasteners 7;

[0045] Step 3: Next, loosen the nuts on the end plate fasteners 7 and adjust the height of the adjustable end plate 5 up and down. When the height of the adjustable end plate 5 and its corresponding integrated embedded parts are consistent, tighten the nuts. That is, adjust the height of the adjustable end plate 5 to be consistent with the height of the pair of integrated embedded parts corresponding to it. Then, install the tensioning fasteners 6 one by one and tighten the nuts on the tensioning fasteners 6.

[0046] Step 4: Finally, pour concrete 1 in the formwork 3a. After the concrete 1 is poured and reaches the designed strength, gradually remove the tensioning fasteners 6, the adjustable end plate 5, the reaction support 4 and the formwork 3a.

[0047] Specifically, in the above step 3, the integrated embedded part is tightened and adheres closely to the side surface of the formwork 3a, and the nut on the tensioning fastener 6 is tightened.

[0048] Specifically, in the above step 4, the concrete 1 is plain concrete.

[0049] Specifically, after the above step 4 is completed, a cable bracket is set up on the integrated embedded part, and then the cable is laid on the cable bracket.

[0050] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A construction method for a simple installation device for embedded parts in the side wall of a clear concrete cable trench, wherein the simple installation device for embedded parts in the side wall of a clear concrete cable trench comprises a reaction support (4), wherein two ends of the reaction support (4) are correspondingly provided with a plurality of pairs of adjustable end plates (5), and each end of each adjustable end plate (5) is respectively provided with a tensioning fastener (6), and each tensioning fastener (6) is connected to one end of an integrated embedded part pre-buried in the side wall of the cable trench; and the characteristics are: The adjustable end plate (5) is connected to the end upright of the reaction force support (4) via an end plate fastener (7), and the adjustable end plate (5) has a longitudinal adjustment function; The adjustable end plate (5) is provided with an end plate fastening hole, and the end plate fastener (7) is a U-shaped structure. The end plate fastener (7) wraps the end uprights of the reaction support (4), passes through the end plate fastening hole, and is fixed by nuts. A tensioning fastening hole is reserved on the adjustable end plate (5), a hanging hole is reserved at the end of the integrated embedded part, one end of the tensioning fastener (6) is a hook structure and is hung in the hanging hole, and the other end of the tensioning fastener (6) is a screw structure that passes through the tensioning fastening hole and is fixed by a nut; The construction method comprises: Step 1: Complete the steel bar binding of the cable trench bottom plate and the side wall, and then embed the integrated embedded parts on the steel bars of the side wall. After the integrated embedded parts are embedded, lay the template on the cable trench bottom plate and the side wall (3a); Step 2: Install the reaction support (4), and install the adjustable end plates (5) corresponding to the vertical rods at both ends of the reaction support (4) and fix them with end plate fasteners (7); Step 3: Adjust the height of the adjustable end plate (5) to be consistent with the height of the pair of integrated embedded parts corresponding thereto, and then keep the force directions of the tension fastener (6), the hanging hole of the integrated embedded part, and the tension fastening hole of the adjustable end plate (5) consistent, install the tension fasteners (6) one by one, and tighten the nuts on the tension fasteners (6); Step 4: pouring concrete (1) in the formwork (3a). After the concrete (1) is poured and reaches the designed strength, the tensioning fasteners (6), the adjustable end plates (5), the reaction support (4) and the formwork (3a) are gradually removed.

2. The construction method of the simple installation device for embedded parts in the side wall of a clear concrete cable trench according to claim 1 is characterized in that: The reaction force support (4) is a support with a rectangular parallelepiped structure formed by connecting and combining a plurality of cross bars and vertical bars.

3. The construction method of the simple installation device for embedded parts in the side wall of a bare concrete cable trench according to claim 1 is characterized in that: One of the integrated embedded parts is a full-length embedded part (3) that is continuous with the side wall of the cable trench.

4. The construction method of the simple installation device for embedded parts in the side wall of a clear concrete cable trench according to claim 1 is characterized in that: The integrated embedded part is composed of a plurality of block embedded parts (2) and a fixing rib (8); the plurality of block embedded parts (2) are arranged along the length direction of the cable trench side wall and connected into a whole through the fixing rib (8).

5. The construction method of the simple installation device for embedded parts in the side wall of a bare concrete cable trench according to claim 1 is characterized in that: In the above step 3, the integrated embedded part is tightened and adheres closely to the side of the template (3a) and the nut on the tensioning fastener (6) is tightened.

6. The construction method of the simple installation device for embedded parts in the side wall of a bare concrete cable trench according to claim 1 is characterized in that: After the above step 4 is completed, a cable bracket is set up on the integrated embedded part, and then the cable is laid on the cable bracket.

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