Railway support preformed hole measuring device

Abstract

The utility model discloses a railway support preformed hole measuring device. A main longitudinal beam and a main cross beam are welded in a cross manner; the auxiliary longitudinal beam is connected with the main cross beam through an adjusting bolt; the support measuring formwork is fixed with the auxiliary longitudinal beam through a bolt; an adjusted support is firstly placed on the top of a bridge pier, the prisms at the positions of the four supports are measured after a total station is arranged, when actual measurement and theoretical coordinates of the positions of the supports are smaller than 2 mm, and the relative height difference is smaller than 1 mm, the supports are fixed to a padstone template, and padstone concrete is poured. After the railway support preformed hole measuring device is adopted, the position of a support preformed hole can be rapidly and accurately measured, the device is more convenient and more accurate than the device which is fixed on a padstone reinforcing steel bar through PVC after traditional point-by-point lofting, the time for a measuring procedure is greatly shortened, personnel allocation is reduced, and the device has extremely wide popularization value.

Description

Technical Field

[0001] The utility model relates to the field of measuring reserved holes of straight and curved supports of railway bridges, and in particular to a measuring device for reserved holes of railway supports. Background Art

[0002] Currently, the construction of high-speed rail, passenger-dedicated lines, and conventional railways primarily focuses on bridge structures. The erection of simply supported beams is a major step in bridge construction. With the stringent quality requirements for high-speed rail tracks, the precise positioning of simply supported beams is particularly important. Erection of straight bridges is relatively simple, with the support centers and beam end lines essentially parallel, making layout and construction straightforward. However, post-erection re-measurements of precast beams for curved bridges reveal varying degrees of deviation in their planar position, particularly for small-radius curves. During installation, anchor bolts have sometimes deviated from their designated holes, requiring the re-drilling of pre-designated holes in the pad stones. This not only increases construction costs but also makes subsequent acceptance difficult. Summary of the Invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a railway support pre-hole measuring device, which can quickly realize the accurate measurement and positioning of the position of straight and curved bridge support pre-holes by adjusting the bracket deflection angle and measuring the four forced prisms of the support mold.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A railway support reserved hole measuring device comprises a main longitudinal beam (1) and a main cross beam (2), and is characterized in that: the main longitudinal beam (1) and the main cross beam (2) are cross-welded; the auxiliary longitudinal beam (3) and the main cross beam (2) are connected by adjusting bolts (4); the support measuring mold frame (7) is fixed to the auxiliary longitudinal beam (3) by bolts (6); and each support measuring mold frame (7) is installed with a forced centering prism (5).

[0006] The auxiliary longitudinal beam (3) is connected to the main cross beam (2) by two adjustment bolts, so that the angle between the auxiliary longitudinal beam (3) and the main longitudinal beam (1) can be adjusted.

[0007] When the support measuring mold frame (7) is connected to the secondary longitudinal beam (3), the axis of the secondary longitudinal beam (3) and the axis of the support measuring mold frame (7) coincide with each other, and the deviation is no more than 2 mm.

[0008] The support measuring mold frame (7) has four corners with reserved molds for the support anchor bolts, with a length of 30 to 50 cm, which is adjusted according to the design requirements. The relative deviation of the four corner support anchor bolt molds is not more than 2 mm.

[0009] Four of the forced centering prisms (5) are placed in each device, and the position of the prism is the center position of the support, with a relative error of less than 2 mm.

[0010] The beneficial effects of the utility model are:

[0011] The utility model is suitable for the layout and construction of railway bridge supports. The adjusted bracket is first placed on the top of the bridge pier, and the prism of the four support positions is measured after the total station is set up. When the measured and theoretical coordinates of the support position are less than 2mm, and the relative height difference is less than 1mm, the bracket is fixed on the cushion stone template and the cushion stone concrete is poured. By adopting a railway support reserved hole measuring device, the position of the support reserved hole can be measured quickly and accurately. It is more convenient and accurate than the traditional point-by-point layout and then fixed on the cushion stone steel bar with PVC. It greatly shortens the measurement process time and reduces personnel allocation, and has extremely wide promotion value.

[0012] The utility model is suitable for the layout and construction of railway bridge supports, which not only improves the measurement efficiency but also ensures the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a top view structural diagram of the utility model when the straight bridge support holes are installed at equal distances;

[0014] Figure 2 This is a schematic diagram of the structure of the installation of the curved bridge support holes with unequal distances;

[0015] Figure 3 This is a schematic diagram of the front structure of the utility model;

[0016] Figure 4 It is a side structural diagram of the utility model;

[0017] Figure 5 Plan view of the layout of the straight bridge support holes of the utility model;

[0018] Figure 6 Plan view of the layout of the support holes of the curved bridge of this utility model;

[0019] Among them, 1 is the main longitudinal beam; 2 is the main transverse beam; 3 is the secondary longitudinal beam; 4 is the adjustment bolt; 5 is the forced centering prism; 6 is the bolt; 7 is the support measurement formwork. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figure 1 、 2As shown in Figures 3 and 4, a railway support pre-hole measuring device is characterized by: the main longitudinal beam (1) and the main cross beam (2) are welded into a cross; the auxiliary longitudinal beam (3) and the main cross beam (2) are connected together by adjusting bolts (4), and the auxiliary longitudinal beam (3) can be rotated to adjust the angle; the support measurement formwork (7) is fixed to the auxiliary longitudinal beam (3) through bolts (6). A forced centering prism (5) is installed on each support formwork, and the relative position is adjusted by four prisms during measurement. When the accuracy is met, the entire measuring device is fixed on the pad stone template for concrete pouring. Through field tests, the device can achieve accurate positioning of railway curved and straight support pre-holes, reducing the cost of secondary rework in the later stage.

[0022] The auxiliary longitudinal beam (3) is connected to the main cross beam (2) by two adjustment bolts, so that the angle of the auxiliary longitudinal beam (3) and the main longitudinal beam (1) can be adjusted to achieve the adjustment of the deflection angle of different supports of straight and curved bridges.

[0023] When the support measuring mold frame (7) is connected to the secondary longitudinal beam (3), the axis of the secondary longitudinal beam (3) and the axis of the support measuring mold frame (7) coincide with each other, and the deviation is no more than 2 mm.

[0024] The support measuring mold frame (7) has four corners with reserved molds for the support anchor bolts, with a length of 30 to 50 cm, which is adjusted according to the design requirements. The relative deviation of the four corner support anchor bolt molds is not more than 2 mm.

[0025] Four of the forced centering prisms (5) are placed in each device, and the position of the prism is the center position of the support, with a relative error of less than 2 mm.

[0026] The working principle of this utility model is:

[0027] The superstructure of railway bridges mainly adopts the layout of simply supported beams. When the bridge is located on a straight line, the working line of the beam coincides with the center line of the line, and the support layout is relatively simple. When the bridge is located on a curve, the layout of the beam generally adopts the bisection mid-vector method. Due to the change in the layout method, the support position and the working line of the beam form an angle, and the calculation of the coordinate position during layout is more cumbersome. Figure 5 、 Figure 6 This is a schematic diagram of the railway bridge layout. By adjusting the angle of the secondary longitudinal beam, this measuring device can accurately position supports at different angles, achieving fast and accurate measurement.

[0028] A forced centering prism is installed on each support formwork. During measurement, the four prisms are used to adjust relative positions. When accuracy is met, the entire measuring device is fixed to the pad stone formwork and concrete pouring begins. Field trials have shown that this device can accurately locate the reserved holes for curved and straight railway supports, reducing the cost of subsequent rework.

[0029] By first placing the adjusted bracket on the top of the bridge pier, and then setting up the total station to measure the prisms of the four support positions, when the measured and theoretical coordinates of the support positions are less than 2mm, and the relative height difference is less than 1mm, the bracket is fixed to the pad stone template and the pad stone concrete is poured. By adopting a railway support pre-hole measurement device, the position of the support pre-hole can be quickly and accurately measured. This is more convenient and accurate than the traditional point-by-point layout followed by PVC fixation to the pad stone reinforcement. It greatly shortens the measurement process time and reduces staffing, and has extremely wide promotion value.

Claims

1. A railway support reserved hole measuring device, comprising a main longitudinal beam (1) and a main transverse beam (2), characterized in that: The main longitudinal beam (1) and the main cross beam (2) are cross-welded; the auxiliary longitudinal beam (3) and the main cross beam (2) are connected by adjusting bolts (4); the support measuring formwork (7) is fixed to the auxiliary longitudinal beam (3) by bolts (6); each support measuring formwork (7) is installed with a forced centering prism (5).

2. A railway support reserved hole measuring device according to claim 1, characterized in that: The auxiliary longitudinal beam (3) is connected to the main cross beam (2) by two adjustment bolts, so that the angle between the auxiliary longitudinal beam (3) and the main longitudinal beam (1) can be adjusted.

3. The railway support reserved hole measuring device according to claim 1, characterized in that: When the support measuring mold frame (7) is connected to the secondary longitudinal beam (3), the axis of the secondary longitudinal beam (3) and the axis of the support measuring mold frame (7) coincide with each other, and the deviation is no more than 2 mm.

4. The railway support reserved hole measuring device according to claim 1, characterized in that: The support measuring mold frame (7) has four corners with reserved molds for the support anchor bolts, with a length of 30 to 50 cm, which is adjusted according to the design requirements. The relative deviation of the four corner support anchor bolt molds is not more than 2 mm.

5. The railway support reserved hole measuring device according to claim 1, characterized in that: Four of the forced centering prisms (5) are placed in each device, and the position of the prism is the center position of the support, with a relative error of less than 2 mm.

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