CN216898698U

CN216898698U - Tunnel is steel bow member testing platform just

Info

Publication number: CN216898698U
Application number: CN202220122343.5U
Authority: CN
Inventors: 刘波; 潘睿; 彭旭旺; 蒋东; 屠元奎; 牛卫东
Original assignee: Gansu Luqiao Highway Investment Co ltd; China Railway No 5 Engineering Group Co Ltd; Fourth Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd; South China Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Current assignee: Gansu Luqiao Highway Investment Co ltd; China Railway No 5 Engineering Group Co Ltd; Fourth Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd; South China Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-07-05
Anticipated expiration: 2032-01-17

Abstract

The utility model relates to a tunnel primary support steel arch frame detection platform. The utility model relates to a tunnel primary support steel arch frame detection platform, which comprises: the device comprises a movable frame, a dial and a plurality of sliding seats; the movable rack with calibrated scale fixed connection, be equipped with a plurality of groups of circular arc scale of the same centre of a circle on the calibrated scale, every the sliding seat can follow on the calibrated scale the normal direction motion of a plurality of groups of circular arc scale. The detection platform for the primary support steel arch of the tunnel, provided by the utility model, has the advantages of simple and reasonable structural design and high accuracy, and can effectively detect the forming sizes of different steel arches, improve the processing efficiency and reduce the construction cost.

Description

Tunnel is steel bow member testing platform just

Technical Field

The utility model relates to the technical field of tunnel engineering, in particular to a tunnel primary support steel arch frame detection platform.

Background

After the tunnel is excavated, in order to control the stress of surrounding rocks to be properly released and deformed, increase the structural safety and facilitate construction, a structural layer which has smaller rigidity and is used as a part of a permanent bearing structure is immediately constructed to serve as an initial support. The primary support generally adopts a steel arch to form a closed loop structure, the radius of the steel arch is different along with the grade of the surrounding rock of the tunnel, and the primary support needs a plurality of steel arches with different radiuses. The steel arch is composed of a plurality of sections of I-shaped steel units, each section of I-shaped steel unit is formed by cold bending of a section steel bending machine, and finally the steel arch is formed by connecting bolts on a connecting plate.

In the production and construction process, in order to ensure that the closed loop forming size of the steel arch frame meets the requirement, a measurer is needed to manually measure the chord length and the chord height by using a steel tape measure in the construction process and then calculate whether the radius and the circular arc of the steel arch frame meet the standard or not. However, the manual steel tape measure has high working strength, deviation is easy to occur in the operation and calculation process, the repair phenomenon is often caused, and the construction cost is increased.

SUMMERY OF THE UTILITY MODEL

Based on the above, the utility model aims to provide the detection platform for the primary support steel arch of the tunnel, which has the advantages of simple and reasonable structural design and high accuracy, can effectively detect the forming sizes of different steel arches, improves the processing efficiency and reduces the construction cost.

A tunnel primary support steel arch detection platform comprises a movable frame, a dial and a plurality of sliding seats; the movable frame is fixedly connected with the dial, a plurality of groups of arc scales with the same circle center are arranged on the dial, and each sliding seat can move on the dial along the normal direction of the arc scales.

When the platform is used, the formed steel arch is placed on the plurality of sliding seats, the plurality of sliding seats are pushed to enable the steel arch to be close to the arc scales on the dial, each group of arc scales can represent a scale value because each group of arc scales is concentric with a circle but different in diameter, and the steel arch outer diameter size can be measured according to the number on the arc scales, so that whether the steel arch conforms to the size or not can be measured.

Further, the movable frame comprises a movable base and universal wheels; the universal wheel is fixedly connected with the movable base. The universal wheel is stable and reliable, so that the movable frame can move flexibly.

Furthermore, the dial comprises a dial body and a plurality of positioning frames which correspond to the sliding seats one by one, and each positioning frame is fixedly connected with the dial body; the sliding seat is connected with the positioning frame and can do linear reciprocating motion along the normal direction of the plurality of groups of circular arc scales.

Furthermore, the dial body is formed by splicing a plurality of dial units in sequence. The manufacturing process is simplified and several dial units may be identical or different.

Furthermore, the dial body comprises two first dial units and two second dial units which are sequentially connected according to the first dial unit, the second dial unit and the first dial unit. Only two dial units can be manufactured and then spliced into the dial, so that the production efficiency is improved.

Furthermore, the dial is provided with 5 circular arc-shaped long strip hole groups, each circular arc-shaped long strip hole group comprises a plurality of circular arc-shaped long strip holes which are concentric and have the same width, and the width is the extension length of the circular arc-shaped long strip holes in the normal direction; the upper edge lines of all the circular arc-shaped long-strip holes in the same circular arc-shaped long-strip hole group are concentric circular arc lines with the same diameter and form a group of circular arc scales, the lower edge lines of all the circular arc-shaped long-strip holes in the same circular arc-shaped long-strip hole group are concentric circular arc lines with the same diameter and form another group of circular arc scales, and thus 10 groups of circular arc scales are formed in 5 circular arc-shaped long-strip hole groups.

Further, the dial is semi-annular. The dial is the same as or similar to the steel arch to be measured in shape, so that the material and the production and manufacturing cost can be saved.

Furthermore, the sliding seat is connected with the positioning frame in a screw rod transmission manner. The screw rod has high transmission precision and small error.

Further, the sliding seat comprises a sliding seat body, a screw rod, a first nut, a second nut, a third nut and a fourth nut; a lateral wall of the sliding seat body is provided with a through hole, a lateral wall of the positioning frame is provided with a through hole, the screw rod penetrates through the through hole in the positioning frame and is connected with the through hole of the sliding seat body, the first nut is fixedly connected with the positioning frame and is coaxial with the through hole, the second nut is arranged at one end of the through hole and is fixedly connected with the screw rod, the third nut is arranged at the other end of the through hole and is fixedly connected with the screw rod, and the fourth nut is fixedly connected with the tail end of the screw rod. The screw rod is screwed to enable the sliding seat body to move linearly and reciprocally along the axial direction of the screw rod, so that the measured part is driven to be compared with the arc scales on the dial, judgment is made, and operation is simple and convenient.

Furthermore, the sliding seat body is provided with an accommodating groove. The measured piece is stable during measurement, the offset displacement is small, and the measurement precision is improved.

For a better understanding and practice, the utility model is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a top view of a detection platform for a primary support steel arch of a tunnel according to the utility model;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a structural diagram of a moving frame 1 of a tunnel primary support steel arch detection platform of the utility model;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a first dial 211 structure of the detection platform for the initial steel arch support of the tunnel according to the present invention;

FIG. 6 is a second dial 212 of the detection platform for the steel arch for initial support of tunnel according to the present invention;

FIG. 7 is an assembly view of the sliding seat 3 and the positioning frame 22 of the detection platform for the primary support steel arch of the tunnel according to the present invention;

fig. 8 is a top view of fig. 7.

Detailed Description

Referring to fig. 1 and 2, a platform for detecting a steel arch centering of a primary support of a tunnel comprises a movable frame 1, a dial 2 and a plurality of sliding seats 3; the movable frame 1 is fixedly connected with the dial 2, a plurality of groups of concentric circular arc scales are arranged on the dial 2, and each sliding seat 3 can move on the dial 2 along the normal direction of the plurality of groups of circular arc scales.

During measurement, the movable frame 1 is moved to place the detection platform in a wide horizontal space, the steel arch to be detected is placed on the sliding seat 3, the sliding seat 3 is moved to enable the steel arch to be detected to be close to the arc scale on the dial 2, the arc scale corresponding to the outer side face of the steel arch to be detected is read, and a result is judged.

Referring to fig. 2, 3 and 4, the moving frame 1 may include a moving base 11, universal wheels 12; universal wheel 12 and 11 fixed connection of removal base, preferably, remove base 11 and form by many steel sheet assembly welding, remove frame 1 and include 3 universal wheelsets, set up respectively at the left end, middle part, the right-hand member that remove frame 1, and every universal wheelset includes 2 universal wheels 12, has guaranteed remove frame 1's stability and can remove in arbitrary direction.

Referring to fig. 1, 2 and 5 to 8, in a specific embodiment, the dial 2 includes a dial body 21 and a plurality of positioning frames 22 corresponding to the plurality of sliding seats 3 one by one, and each positioning frame 22 is fixedly connected to the dial body 21; the sliding seat 3 is connected with the positioning frame 22, and the sliding seat 3 can do linear reciprocating motion along the normal direction of a plurality of groups of circular arc scales.

The dial 2 can be formed by splicing a plurality of dial units in sequence, and the dial units can be the same or different. Preferably, the scale disk 2 includes two first scale disks 211 and two second scale disks 212, which are sequentially connected by the first scale disk 211, the second scale disk 212, the second scale disk unit 212, and the first scale disk 211. Thus, only two dial units can be manufactured and then spliced into the dial, and the production efficiency is improved.

Referring to fig. 5 and 6, the dial body 21 is provided with 5 circular arc-shaped long strip hole groups 23, and each circular arc-shaped long strip hole group 23 comprises a plurality of circular arc-shaped long strip holes 231 which are concentric and have the same width and are sequentially arranged; the upper edge lines of the circular arc-shaped elongated holes 231 in the same circular arc-shaped elongated hole group 23 are concentric circular arc lines with the same diameter and form a group of circular arc scales, and the lower edge lines of the circular arc-shaped elongated holes 231 in the same circular arc-shaped elongated hole group 23 are concentric circular arc lines with the same diameter and form another group of circular arc scales. Thus, the 5 circular arc-shaped long strip hole groups enable the detection platform to be capable of measuring 10 steel arches with different radiuses.

Referring to fig. 1, in a preferred embodiment, the dial 2 is made into a semi-ring shape, and the shape of the dial is the same as or similar to that of the steel arch to be detected, so that the material consumption, the production and manufacturing cost and the weight of the detection platform are saved, and the use is more convenient and flexible.

Referring to fig. 1, 2, 7 and 8, as a specific embodiment, the connection mode of the sliding seat 3 and the positioning frame 22 is a screw transmission connection. The sliding seat 3 may include a sliding seat body 31, a lead screw 32, and a first nut 33, a second nut 34, a third nut 35, and a fourth nut 36; a through hole is formed in one side wall of the sliding seat body 31, a through hole is formed in one side wall of the positioning frame 22, the screw rod 32 penetrates through the through hole in the positioning frame 22 and is connected with the through hole of the sliding seat body 31, the first nut 33 is fixedly connected with the positioning frame 22 and is coaxial with the through hole, the second nut 34 is arranged at one end of the through hole and is fixedly connected with the screw rod 32, the third nut 35 is arranged at the other end of the through hole and is fixedly connected with the screw rod 32, and the fourth nut 36 is fixedly connected with the tail end of the screw rod 32. The fourth nut 36 is screwed, and the screw rod 32 rotates to make the sliding seat body 31 do linear reciprocating motion along the axial direction of the screw rod 32, so that the steel arch to be measured is driven to be compared with the scales on the dial, and judgment is made. The screw rod is adopted for transmission connection, so that the measuring precision of the detection platform is high, and the error is small.

Can also be equipped with holding tank 311 on the sliding seat body 31, during the detection, lay the good steel bow member of shaping on the holding tank 311 of sliding seat body 31, play the positioning action to the steel bow member that awaits measuring, difficult removal when making the detection, measuring result is more accurate. When the screw rod 32 is rotated to enable the steel arch to approach the corresponding arc scale on the dial 2, the difference between the outer edge arc of the steel arch and the corresponding standard arc scale is compared to judge whether the size of the steel arch is qualified or not, the operation method is simple, and the working efficiency is high. The accommodating groove 311 is arranged, so that a measured piece is placed stably and has small offset displacement during measurement, the measurement precision is improved, and compared with manual measuring by a tape measure, the measuring tape is higher in precision and higher in efficiency.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, to those skilled in the art, changes and modifications may be made without departing from the spirit of the present invention, and it is intended that the present invention encompass such changes and modifications.

Claims

1. The utility model provides a tunnel first steel bow member testing platform which characterized in that: comprises a movable frame, a dial and a plurality of sliding seats; the movable frame is fixedly connected with the dial, a plurality of groups of arc scales with the same circle center are arranged on the dial, and each sliding seat can move on the dial along the normal direction of the arc scales.

2. The tunnel primary support steel arch detection platform according to claim 1, characterized in that: the moving frame comprises a moving base and universal wheels; the universal wheel is fixedly connected with the movable base.

3. The tunnel primary support steel arch detection platform according to claim 1, characterized in that: the dial comprises a dial body and a plurality of positioning frames which correspond to the sliding seats one by one, and each positioning frame is fixedly connected with the dial body; the sliding seat is connected with the positioning frame and can do linear reciprocating motion along the normal direction of the plurality of groups of circular arc scales.

4. The tunnel primary support steel arch detection platform according to claim 3, characterized in that: the dial body is formed by splicing a plurality of dial units in sequence.

5. The tunnel primary support steel arch detection platform according to claim 4, wherein: the dial body comprises two first dial units and two second dial units which are sequentially connected according to the first dial units, the second dial units and the first dial units.

6. The tunnel primary support steel arch detection platform according to claim 1, characterized in that: the dial is provided with 5 circular arc strip hole groups, and each circular arc strip hole group comprises a plurality of circular arc strip holes which are concentric and have the same width and are sequentially arranged; the upper edge lines of all the circular arc-shaped long holes in the same circular arc-shaped long hole group are concentric circular arc lines with the same diameter and form a group of circular arc scales, and the lower edge lines of all the circular arc-shaped long holes in the same circular arc-shaped long hole group are concentric circular arc lines with the same diameter and form another group of circular arc scales.

7. The tunnel primary support steel arch detection platform according to claim 1, characterized in that: the dial is semi-annular.

8. The tunnel primary support steel arch detection platform according to claim 3, wherein: the sliding seat is connected with the positioning frame in a screw rod transmission mode.

9. The detection platform for the steel arch centering of the primary support of the tunnel according to any one of claims 3 and 8, wherein: the sliding seat comprises a sliding seat body, a screw rod, a first nut, a second nut, a third nut and a fourth nut; a lateral wall of the sliding seat body is provided with a through hole, a lateral wall of the positioning frame is provided with a through hole, the screw rod penetrates through the through hole in the positioning frame and is connected with the through hole of the sliding seat body, the first nut is fixedly connected with the positioning frame and is coaxial with the through hole, the second nut is arranged at one end of the through hole and is fixedly connected with the screw rod, the third nut is arranged at the other end of the through hole and is fixedly connected with the screw rod, and the fourth nut is fixedly connected with the tail end of the screw rod.

10. The tunnel primary support steel arch detection platform according to claim 9, wherein: the sliding seat body is provided with an accommodating groove.