CN207144959U - A kind of plastics pre-buried channel flow device for positioning and securing - Google Patents

Abstract

The utility model belongs to the technical field of building construction, and relates to a positioning and fixing device for a pre-buried channel made of plastic, which is used in the construction occasions of the pre-buried channel in the field of subway, high-speed rail and construction; The problem of long length and low embedded precision, its main structure includes fixed cover, anti-grouting gasket, hexagon socket flat end set screw, embedded channel, segment mold, double-headed fastening bolt and anchor rod, vertically arranged The fixed cover of the upper and lower structures is connected with the pre-buried channel through the anti-grouting gasket. The top of the fixed cover is provided with an anchor rod for anchoring. The bottom of the fixed cover is fixedly connected with the double-headed fastening bolt by the hexagon socket flat-end fastening screw. The double-headed fastening bolts are fixedly connected with the segment mold by threads. Its structure is simple, easy to disassemble and assemble, and it is economical and practical. It improves construction efficiency, saves engineering costs, and ensures construction quality. It has good economic benefits and broad market application prospects. .

Description

A plastic pre-buried channel positioning and fixing device

Technical field:

The utility model belongs to the technical field of building construction, and relates to a positioning and fixing device for a pre-buried channel made of plastic, which is used for the construction occasions of the pre-buried channel in the field of subway, high-speed rail and construction.

Background technique:

The pre-embedded channel is widely used and can be used in subways, high-speed rail, construction and other occasions, but the pre-embedded channel needs to be fixed on the segment in advance, so it is necessary to fix the pre-embedded channel on the segment mold. At present, welding is often used for fixing, because the construction of subways and high-speed rails has high anti-corrosion requirements for pre-embedded channels. There are problems such as that the pre-embedded position accuracy of the pre-embedded channel cannot be guaranteed, and the pre-embedded channel and the segment mold cannot be effectively bonded, which not only affects the pre-embedded quality of the pre-embedded channel, but also brings difficulties to the installation of tunnel supports in the later stage.

In the prior art, Chinese patent CN204646255U discloses a plastic pre-buried channel positioning and fixing device, including a fixed cover, a gasket, a pre-buried channel, a hexagon socket flat-end set screw, a fixed shaft, and a segment mold. The pre-embedded channel is a hollow structure with a longitudinal opening on the bottom and a positioning reference hole on the top. The fixed cover is integrally formed. The upper end section of the fixed cover is cross-shaped, and there is an anti-grouting Gasket, there are threads inside the lower end of the fixed cover, and the lower end of the fixed cover passes through the positioning reference hole of the embedded channel. The set screw with flat end of the hexagon socket is a national standard part. Shaft connection, the fixed shaft, one end is an internal thread, connected to the hexagon socket flat end set screw, and the other end is an external thread, connected and fixed with the threaded hole on the segment mold. The upper end section of the fixed cover is cross-shaped, which is convenient for tightening the fixed cover. The two sides of the end of the cylindrical position of the fixed shaft are milled to facilitate the installation and fixation of the fixed shaft on the segment mold with an installation tool. The threaded holes on the segment mold are through holes. When the positioning position is changed, bolts can be screwed into the outside of the segment mold for sealing. However, the pre-embedded bolts take too long to install, resulting in a long foundation construction period, and Embedding accuracy is low. Chinese patent CN204646260U discloses the connecting member between the pre-embedded channel and the segment mold, which consists of a fixed nut, an anti-grouting gasket, a hexagon socket flat end set screw, an intermediate connector, a hexagon socket flat end set screw, and a segment mold. The fixing nut is integrally formed, the cross-sectional shape of the upper end is cross-shaped, and there are threads inside the lower end. There is a positioning reference hole at the upper end of the embedded channel, a longitudinal opening at the lower end, and an anti-grouting gasket between the fixing nut and the embedded channel. The hexagon socket flat end set screws are all national standard parts. Both ends of the intermediate connector have internal threads, which are used to connect the hexagon socket flat end set screws at both ends. One end of the hexagon socket flat end set screw with the internal hexagon is facing upwards, and the lower end of the hexagon socket flat end set screw is connected to the segment mold, but the pre-embedded installation time of the pre-embedded bolts is too long, resulting in a long foundation construction period and pre-installation. The buried accuracy is low.

Invention content:

The purpose of this utility model is to overcome the deficiencies of the prior art, seek to provide a plastic pre-embedded channel positioning and fixing device, and solve the problems of long pre-embedded installation time of pre-embedded bolts and low pre-embedded precision in the construction of the frame foundation. Easy assembly, short time-consuming reinforcement, high installation accuracy and repeatable disassembly and assembly.

In order to achieve the above object, the main structure of the positioning and fixing device for the plastic pre-buried channel involved in the utility model includes the main structure of the positioning and fixing device for the plastic pre-buried channel, which includes a fixed cover, an anti-grouting gasket, and a hexagon socket flat-end set screw , pre-buried channels, segment molds, double-headed fastening bolts and anchor rods, wherein fan-shaped holes are provided on the fixed cover, milling grooves are provided on the double-ended fastening bolts, and the vertically arranged fixed covers of the upper and lower structures pass through The anti-grouting gasket is connected with the embedded channel, and the top of the fixed cover is provided with an anchor rod for anchoring. Segment mold threaded fixed connection.

The fixed cover has an integrated structure, the upper end is a square structure, the lower end is a cylindrical structure, and the internal thread inside the lower end matches the external thread at one end of the hexagon socket flat end set screw; the connection between the square structure and the cylindrical structure is radial Evenly set more than one fan-shaped hole to facilitate demoulding;

The set screw with flat end of the hexagon socket is a national standard;

The pre-buried channel is two U-shaped steels with the same size and structure;

The hexagon socket flat-end fastening bolt at one end of the double-headed fastening bolt has the same axial cross-section size as the hexagon socket flat-end fastening bolt; The threaded holes are matched; there are milling grooves on both sides of the middle and upper parts of the double-headed fastening bolts, which is convenient for installation and fixing.

The working principle of the plastic pre-buried channel positioning and fixing device involved in the utility model is as follows: the upper end of the fixed cover is rectangular in shape, compared with the current technology, the processing is simple, and the installation tool is convenient for installation and fixing; the fixed cover and There are anti-grouting gaskets between the pre-embedded channels, which can effectively improve the sealing performance and prevent concrete and mud from entering the channel when the segments are poured; the fixed cover is used in conjunction with the stud bolts, which can be conveniently and accurately pre-embedded The position adjustment of the bolts can effectively prevent the sliding of the embedded channel and ensure accurate positioning for a long time.

The specific operation steps of the plastic pre-buried channel positioning and fixing device involved in the utility model are as follows:

1. Material selection: First, determine the stud bolts for installation according to the pre-embedded position of the channel on the construction site and the positioning holes. The number of stud bolts must be determined according to the length of the channel, and more than 2 stud bolts for installation are used;

2. Process the segment formwork: Then open the installation holes on the segment formwork, tighten the stud bolts and fix them on the segment formwork, so that when the installation plan of the embedded channel is not used, the fixing bolts for installation can be replaced with ordinary round Head bolts to restore the segment formwork to the unopened state, reducing damage to the segment formwork;

3. Fix the pre-embedded channel: Then corresponding to the position where the stud bolts are installed on the segment template, there are corresponding holes on the back of the pre-embedded channel, and the fixed cover is connected with the stud bolts with the hexagon socket flat-end set screw. In order to press the embedded channel tightly on the segment mold;

4. Hoisting into the reinforcement cage: Then hoist the tied reinforcement cage into the segment formwork, and avoid the collision between the reinforcement cage and the anchor rod during the mold entry process, so as to avoid loosening of the pre-embedded channel and prevent flow loss. If the pre-embedded channel is found to be loose, it should be adjusted immediately. The surface of the pre-embedded channel is treated with hot-dip galvanizing and sealing coating. In addition to achieving anti-corrosion effects, the sealing coating can insulate the pre-embedded channel. When the channel is in contact with the structural steel bars, the stray current is derived from it, causing electrical corrosion to the embedded channel, external brackets and pipelines, and trying to protect the coating of the embedded channel from being damaged;

5. Concrete pouring: Then the segment formwork is poured. If the overall vibration method is used during the process, no special care is required. If a vibrator is used to vibrate, special care is required. It is strictly forbidden to touch the embedded channel and segment formwork. To avoid loosening of the pre-buried channel;

6. Mold demoulding: increase the total force of the segment demoulding during the final demoulding, so that the fan-shaped hollows at the upper end and the lower end of the fixed cover are disconnected, and the demoulding is completed;

7. Clean up and record: Clean up the cement attached to the surface of the pre-embedded channel and the internal foam filler, and check various technical indicators such as channel spacing error and embedding difference, and make records to accumulate construction experience.

Compared with the existing technology, this utility model has the advantages of convenient installation, high installation position accuracy, good fit between the pre-embedded channel and the segment mold, which improves the pre-embedded quality, and at the same time, the surface coating of the channel will not be damaged during installation. The anti-corrosion ability of the embedded channel is guaranteed, and the stud bolts are more suitable for the installation of segments and channels. The solid top cover is made of plastic, which can effectively reduce weight. Its structure is simple, easy to disassemble and assemble, and it is economical and practical. It improves construction efficiency, saves engineering costs, ensures construction quality, and has good economic benefits and broad market application prospects.

Description of drawings:

Fig. 1 is a schematic diagram of the main structure of the plastic pre-embedded channel positioning and fixing device involved in the present invention.

Fig. 2 is a schematic diagram of the structure and principle of the fixed cover involved in the present invention.

Fig. 3 is a schematic diagram of the structure and principle of the stud bolt involved in the present invention.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described.

Example 1:

The main structure of the plastic pre-embedded channel positioning and fixing device involved in this embodiment includes a fixed cover 1, an anti-grouting gasket 2, a hexagon socket flat-end set screw 3, a pre-embedded channel 4, a segment mold 5, a double-headed clamp Fastening bolts 6 and anchor rods 9, wherein, the fixed cover 1 is provided with fan-shaped holes 7, the double-headed fastening bolts 6 are provided with milling grooves 8, and the vertically arranged fixed cover 1 of the upper and lower structure passes through the anti-grouting gasket 2 and The pre-buried channel 4 is connected, the top of the fixed cover 1 is provided with an anchor rod 9 for anchoring, the bottom of the fixed cover 1 is fixedly connected with the double-headed fastening bolt 6 through the hexagon socket flat-end fastening screw 3, and the double-headed fastening bolt 6 is fixedly connected with the segment mold 5 in a threaded manner.

The fixed cover 1 has an integrated structure, the upper end is a square structure, the lower end is a cylindrical structure, and the internal thread inside the lower end matches the external thread at one end of the hexagon socket flat-end set screw 3; the connection between the square structure and the cylindrical structure More than one fan-shaped hole 7 is uniformly arranged in the radial direction to facilitate demoulding.

The set screw 3 with flat end of the hexagon socket is a national standard part;

The embedded channel 4 is two hollow U-shaped steels with the same size and structure;

The hexagon socket flat-end fastening bolt at one end of the double-headed fastening bolt 6 has the same axial cross-sectional size as the hexagon socket flat-end fastening bolt 3; The threaded holes on the sheet mold 5 match; the two sides of the middle and upper parts of the double-headed fastening bolt 6 are provided with milling grooves 8, which are convenient for installation and fixing.

Claims (5)

1. A plastic pre-embedded channel positioning and fixing device, characterized in that: the main structure includes a fixed cover, an anti-grouting gasket, a hexagon socket flat-end set screw, a pre-embedded channel, a segment mold, and a double-headed fastening bolt and anchor rods, wherein the fixed cover is provided with fan-shaped holes, and the double-headed fastening bolts are provided with milling grooves. There is an anchor rod for anchoring, and the bottom of the fixed cover is fixedly connected with the double-headed fastening bolt through the hexagon socket flat-end set screw, and the double-ended fastened bolt is threaded and fixedly connected with the segment mold. 2. The plastic embedded channel positioning and fixing device according to claim 1, wherein the embedded channel is two hollow U-shaped steels with the same size and structure. 3. The plastic pre-buried channel positioning and fixing device according to any one of claims 1-2, characterized in that: the fixed cover is an integral structure, the upper end is a square structure, and the lower end is a cylindrical structure, square More than one fan-shaped hole is evenly arranged in the radial direction at the joint between the structure and the cylindrical structure. 4. The plastic pre-buried channel positioning and fixing device according to any one of claims 1-2, characterized in that: the hexagon socket flat end fastening bolt at one end of the double-headed fastening bolt is tightly fixed to the internal hexagon flat end The axial cross-section dimensions of the screws are the same; the external thread of the hexagon socket flat-end fastening bolt at the other end of the double-headed fastening bolt matches the threaded hole on the segment mold; milling grooves are provided on both sides of the middle and upper parts of the double-headed fastening bolt. 5 . The positioning and fixing device for plastic pre-buried channels according to claim 3 , wherein milling grooves are provided on both sides of the middle and upper parts of the double-headed fastening bolts. 6 .