CN209745143U - measuring scale for improving installation precision of prestressed pipeline of prefabricated box girder - Google Patents

Abstract

The utility model discloses an improve measuring tape of prefabricated case roof beam prestressing force piping erection precision, including base and scale, the base forms the contained angle with the scale, the scale is the cube structure, and the scale outside four sides is provided with the scale. The utility model has the advantage of simple structure, easy operation has improved pipeline coordinate efficiency of measurationing, has reduced the error, measuring tape low in cost, durable, the commonality is good, makes the installation accuracy of prefabricated case roof beam prestressing force pipeline obtain effectual assurance.

Description

Measuring scale for improving installation precision of prestressed pipeline of prefabricated box girder

Technical Field

The utility model relates to a prestressed pipe installs technical field, concretely relates to improve measuring tape of prefabricated case roof beam prestressing force piping erection precision.

Background

In the construction process of bridge and highway engineering, the box girder belongs to the superstructure of bridge and highway engineering, and is the main bearing structure of bridge system, and the box girder component is prefabricated generally, and then assembles to the construction site, and the prestressed pipe need be pre-buried in the box girder structure construction of box girder, is the passageway that passes prestressed steel bundle in the box girder prefabrication process, and the installation accuracy of prestressed pipe directly influences the mechanical properties of later stage prestressing force even the life of box girder component, so the installation accuracy of prestressed pipe is crucial in the construction.

In the prior art, the installation and position inspection of the prestressed pipeline of the precast box girder directly measure the distance on a web reinforcing steel bar by using a tape measure, determine the X and Y coordinates of the pipeline, and then weld the positioning reinforcing steel bar of the prestressed pipeline, thereby installing the corrugated pipe. Vertical Y coordinate is bellows pipe bottom to the perpendicular distance of case roof beam bottom plate usually, and single case roof beam web has certain angle of looking up, and the distance of measurationing is the slope distance, if adopt ordinary steel tape measure, the straightness and the angle of elevation goodness of fit of steel tape measure and web reinforcing bar can not obtain complete assurance when measurationing, all can cause certain error during installation and the detection, influences the accuracy of prefabricated case roof beam prestressing force coordinate pipeline position, has certain influence to the life-span and the use of prefabricated case roof beam.

Therefore, it is necessary to provide a new measuring tape for improving the installation accuracy of the prestressed pipe of the precast box girder to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improve measuring tape of prefabricated case roof beam prestressing force piping erection precision, guarantee case roof beam prestressing force piping erection precision, ensure case roof beam structure quality and intensity.

The utility model provides an improve measuring tape of prefabricated case roof beam prestressing force piping erection precision, including base and scale, the scale can be dismantled with the base and be connected, the scale slope sets up on the base, form the contained angle, the scale is the cube structure, and the scale outside four sides all is provided with the scale.

The base is a flat plate base.

Dull and stereotyped base one end sets up the step, ensures the laminating of base and the pedestal of case roof beam structure.

Set up U type mounting panel on the dull and stereotyped base, set up the mounting hole on the U type mounting panel, correspond on the scale and set up the mounting hole, the scale passes through the bolt with dull and stereotyped base and realizes dismantling to be connected, fixes base and scale with the bolt during use, and the bolt is not occupation space not torn open to the time spent.

The angle value of the included angle is 72 degrees. Of course, the angle value can be adjusted according to actual requirements.

the utility model discloses a dull and stereotyped base, including dull and stereotyped base, telescopic rod, scale, connecting rod, telescopic rod, scale, the dull and stereotyped base other end sets up the pedestal, but the welding telescopic rod in the pedestal, and telescopic rod upwards direction setting perpendicularly, telescopically activity cup joints at least two sections single rod-like telescopic rod festival in the pedestal, and the connected mode between two adjacent telescopic rod festival is scalable cup joints, and the telescopic rod festival top of the position of the top during operation contacts with the scale, plays the effect of pointing out the scale and the effect of handle, makes things convenient for.

Adopt the utility model provides an improve measuring tape of prefabricated case roof beam prestressing force pipeline installation precision, prefabricated case roof beam prestressing force pipeline coordinate measuring tape is by the base, the scale two parts are constituteed, base and scale pass through welded connection together, become certain angle (72 °) between the two, directly put the base at the pedestal top surface of prefabricated case roof beam when prefabricated case roof beam prestressing force pipeline coordinate (Y axle) lofting, let the scale hug closely prefabricated case roof beam web reinforcing bar, the four sides all sets up the scale, and the scale is confirmed according to the design document of case roof beam, to quadrature and the skew case roof beam that length is the same, and easy operation, the pipeline coordinate measurement efficiency is improved, the error is reduced, measuring tape low in cost, durability, make the installation precision of prefabricated case roof beam prestressing force pipeline obtain effectual assurance.

Drawings

FIG. 1 is a front view of the measuring tape for improving the installation accuracy of the pre-stressed pipeline of the precast box girder of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a rear view of FIG. 1;

Fig. 4 is a usage state diagram of the present invention.

In the figure, a flat plate base-1, a graduated scale-2, a mounting plate-3, a telescopic rod-4 and a step-5.

Detailed Description

Example one

Referring to fig. 1 and 2 the utility model provides an improve measuring tape of prefabricated case roof beam prestressing force piping erection precision, including dull and stereotyped base 1 and scale 2, set up U type mounting panel 3 on the base, the scale has two offsides of scale to set up the mounting hole, connects through bolt and U type mounting panel, uses bolt fastening with base and scale during the use, and pull out scalable pole 4 and withstand the scale and work as the handle usefulness, the scale is the cube structure, and the scale outside four sides is provided with the scale, and the scale sign on four sides is inconsistent, confirms according to the design document of case roof beam.

The flat base of this embodiment is provided with a step 5 to ensure the attachment of the base to the pedestal of the box girder structure.

the angle value of the included angle in this embodiment is 72 °.

The specific implementation process of this embodiment is as follows:

Referring to fig. 3, when the utility model is used, firstly, the measuring scale base is horizontally arranged on the top surface of the prefabricated pedestal to make the measuring scale base and the pedestal steel plate horizontally attached, and the position of the graduated scale is adjusted according to the design structure of the box girder, and the reading is carried out according to the coordinate of the corresponding coordinate point, so that the Y-axis coordinate corresponding to the X-axis (marked on the prefabricated pedestal according to the design parameters) can be obtained, thereby realizing the purposes of lofting and checking;

The coordinates of the prestressed pipeline need to be lofted point by point, 30% of pipelines are spot-checked in each component (each beam) according to the regulation of highway engineering quality inspection and assessment Standard JTG F80/1-2017, 3 points are measured on each curve section, 1 point is measured on each 10 straight line sections, and the anchoring points and the connecting points are all measured;

The identification data of the front surface (a user uses a base surface system of the measuring scale) of the measuring scale are a mid-span beam N1 beam Y-axis coordinate and an N3 beam coordinate, the back surface is a mid-span beam N2 coordinate, the left side surface is a side-span beam N1 coordinate and an N3 coordinate, the right side surface is a side-span beam N2 coordinate, and the specific numerical value corresponds to a steel beam coordinate value.

Because the prestressed pipeline coordinates are symmetrically arranged by taking the span center line as a symmetry axis, the scales on the measuring tape only mark half of Y-axis coordinates, and the coordinates of 2 points at the left and right of the span of the same beam are consistent, so the marks are only once, the N3 beam is a prefabricated box girder bottom steel beam, the coordinates are changed only at 2Y-axis coordinates at the girder end, so the coordinates are shared with a surface for marking the N1-axis coordinates, the N1 surface marks 11 scales (without mutual influence), and the N2 surface marks 8 scales.

Adopt the utility model discloses an improve measuring tape of prefabricated box girder prestressing force pipeline installation precision, only need an operating personnel can accomplish the measurement, measured error is at 3mm, and the measurement of traditional type needs 2 operating personnel to accomplish the measurement, and measured error range is at 10mm, the utility model discloses compare current steel tape measure easy operation, measurement accuracy is high, and the commonality is good, has both guaranteed construction quality, has shortened construction cycle and has gained economic benefits again.

The foregoing is merely an exemplary embodiment of the invention and other variations may be readily made without departing from the true scope of the invention as described in the following claims.

Claims (7)

1. the utility model provides an improve measuring tape of prefabricated case roof beam prestressing force pipeline installation precision which characterized in that, includes base and scale, and the scale can be dismantled with the base and be connected, the slope of scale sets up on the base, form the contained angle, the scale is the cube structure, and the scale outside four sides all is provided with the scale.

2. The measuring tape for improving the installation accuracy of the prestressed pipeline of the precast box girder as recited in claim 1, wherein said base is a flat plate base.

3. the measuring tape for improving the installation accuracy of the prestressed pipeline of the precast box girder as claimed in claim 2, wherein the slab base is provided with steps.

4. The measuring tape for improving the mounting accuracy of the prestressed pipeline of the precast box girder as claimed in claim 3, wherein the base is provided with a U-shaped mounting plate, the U-shaped mounting plate is provided with mounting holes, the two opposite sides of the graduated scale are correspondingly provided with mounting holes, the graduated scale is connected with the U-shaped mounting plate through bolts, and the base and the graduated scale are fixed by bolts when in use.

5. The measuring tape for improving the mounting accuracy of the prestressed pipe of the precast box girder according to claim 3, wherein the included angle has an angle value of 72 °.

6. The measuring tape for improving the installation accuracy of the prestressed pipeline of the precast box girder as claimed in claim 5, wherein the other end of the slab base is provided with a base body, a telescopic rod is arranged in the base body, the telescopic rod is vertically upwards arranged, at least two single-rod-shaped telescopic rod sections are telescopically and movably sleeved in the base body, the adjacent two telescopic rod sections are telescopically and movably sleeved, and the top end of the telescopic rod section at the uppermost position is in contact with the graduated scale during operation.

7. The measuring tape for improving the mounting accuracy of the prestressed pipeline of the precast box girder as recited in claim 6, wherein the scale marks on four sides of the scale are different.