CN102864745A - PC beam prestressed pipeline three-dimensional position indicator - Google Patents

Abstract

The invention relates to the field of bridge precast beam pipeline positioning construction, and in particular relates to a PC beam prestressed pipeline three-dimensional position indicator, in order to solve the problems that the existing traditional manual positioning is multiple in repeated operation, great in manual operation and great in pipeline positioning deviation, and the like. The PC beam prestressed pipeline three-dimensional position indicator comprises a base, a vertical scale and a horizontal scale, wherein the vertical scale is fixed on the base; the horizontal scale is mutually vertical to the vertical scale and movably connected with the vertical scale through a sliding sleeve; an inclined support rod is fixed between the vertical scale and the horizontal scale; two ends of the inclined support rod are respectively and movably connected with the vertical scale and the horizontal scale; a level bubble is fixed above one end of the horizontal scale; and the other end of the horizontal scale is provided with two positioning scales capable of moving along the horizontal scale. A longitudinal, horizontal and vertical three-dimensional coordinate is adopted for positioning, the pipeline coordinates of a pipeline at different cross-section parts can be positioned accurately, and guarantee is provided for the construction quality, and the PC beam prestressed pipeline three-dimensional position indicator has the advantages of simple structure, small size, light weight, high accuracy and the like, is convenient to carry, is repeatedly used, and can perform accurate pipeline positioning.

Description

PC Beam Prestressed Pipeline Three-Dimensional Locator

technical field

The invention relates to the field of bridge prefabricated beam pipeline positioning construction, in particular to a three-dimensional locator for PC beam prestressed pipelines.

Background technique

Prestressed concrete (PC) prefabricated beams are one of the bridge structures widely used in road and railway bridges. Most of this prefabricated prefabricated beams are pre-cast in the beam factory as structural parts of the beam body, and then moved to The construction site is assembled, so the construction time can be greatly saved. After the prefabricated beam is transported from the beam factory to the construction site, it needs to be hoisted in place with the allowable erection accuracy. The magnitude of the prefabricated beam bearing load is directly proportional to the magnitude of the permanent prestress of the beam body, and the magnitude of the permanent prestress in the beam body is directly related to the coordinates of the prestressed steel strand pipeline and the smoothness of the pipeline during the prefabrication process of the beam body. The coordinates of the prestressed pipes are generally given in the design documents, but in actual construction, due to the different positions of the PC beam pipes at different cross-sections, there are bellows in the PC beams, and there are a large number of longitudinal and transverse pipes at the ends of the PC beams. Reinforced steel bars, prestressed pipelines are difficult to locate, and there are many positioning points. In the traditional construction process, only relying on manual pipeline positioning is relatively rough, and there are many shortcomings such as repeated operations, large manual operation errors, and low work efficiency. The positioning deviation of the stress pipeline is large, the pipeline after positioning is not straight, and the frictional resistance is relatively large during the tensioning process of the steel strand, which causes a large loss of permanent prestress in the beam body, which in turn causes quality problems in the beam body.

Contents of the invention

The present invention provides a PC beam prestressed pipeline three-dimensional locator in order to solve the existing prefabricated beam prestressed pipeline positioning using traditional manual positioning, which has many repetitive operations, large manual operation errors, large pipeline positioning deviation and the like.

The present invention is realized by adopting the following technical solutions: PC beam prestressed pipeline three-dimensional locator, including a base, a vertical scale fixed on the base, and a horizontal scale perpendicular to the vertical scale and movably connected through a sliding sleeve, the vertical scale There is a diagonal strut between the scale and the horizontal scale. The two ends of the diagonal strut are respectively connected with the vertical scale and the horizontal scale. A level bubble is fixed above one end of the horizontal scale. positioning scale. The vial is an existing well-known product, and its function is to ensure that the locator is in a horizontal position during measurement, so as to ensure measurement accuracy.

In order to further optimize the structure of the locator and perfect its functions, the present invention has also carried out the following designs,

The vertical scale, the horizontal scale and the diagonal brace are all hollow pipes with a rectangular cross section.

The sliding sleeve is composed of a first longitudinal sliding sleeve movably fitted on the vertical scale and a first horizontal sliding sleeve vertically fixed to the first longitudinal sliding sleeve; 

One end of the diagonal brace is provided with a second longitudinal sliding sleeve which is slidingly matched with the vertical scale, and the other end is hinged with a second horizontal sliding sleeve which is slidingly matched with the horizontal scale.

The two positioning scales are both composed of a third horizontal sliding sleeve that is slidingly matched with the horizontal scale, and a caliper fixed on the upper edge of the third horizontal sliding sleeve. The positions of the calipers on the two positioning scales are symmetrical to each other.

In order to facilitate the operation on the construction site and read data, the first longitudinal sliding sleeve, the first horizontal sliding sleeve, the second longitudinal sliding sleeve, the second horizontal sliding sleeve and the third horizontal sliding sleeve are all provided with positioning holes. A positioning nut is installed at the position opposite to the position of the positioning hole, and a tightening screw is installed through the positioning nut. After adjusting the positions of the horizontal scale, vertical scale and positioning scale, the sliding sleeve can be fixed to the desired position by tightening the tightening screw. The rulers are fastened together to play a positioning role.

With the structural design of the present invention, when positioning the pipeline, first loosen the first longitudinal sliding sleeve and the tightening screw of the second longitudinal sliding sleeve at one end of the diagonal brace, so that the sliding sleeve and the horizontal scale are in a free state, and then according to the drawing coordinates Calculate the longitudinal coordinates of the current section, slowly move the horizontal scale on the vertical scale to make it reach the ordinate position of the drawing design, and then tighten the jacking screws on the first longitudinal sliding sleeve and the second longitudinal sliding sleeve to make it vertically Then, calculate the transverse coordinates of the current section according to the design drawings, unscrew the tightening screw of the first transverse sliding sleeve and the second transverse sliding sleeve at one end of the diagonal brace, so that the sliding sleeve and the transverse scale are in a free state, and then according to the drawing Horizontal coordinates, slowly move the horizontal scale left and right to the actual horizontal coordinate position of the design drawing, then tighten the jacking screws on the first horizontal sliding sleeve and the second horizontal sliding sleeve, and then loosen the top tightening screw on the third horizontal sliding sleeve on the positioning scale Screw, move the two positioning scales left and right, respectively locate the left and right positions of the PC beam hole, and finally tighten the jacking screw of the third transverse sliding sleeve to fix it.

In order to reduce the impact of traditional construction procedures on the bridge structure, the PC beam pipeline locator of the present invention adopts vertical, horizontal and vertical three-dimensional coordinate positioning, which can accurately locate the pipeline coordinates of the pipeline at different cross-sectional positions, and provides guarantee for the construction quality. Simple structure, small size, light weight, easy to carry, reusable, accurate positioning of pipes, high precision, etc., not only can be used to locate the exact position of prestressed pipes in PC beams, but also can be used in other bridge structures with higher requirements Accurate positioning of steel bars or other components. It solves the problem of accurate positioning of the prestressed pipeline in the PC beam body and the smoothness of the whole pipeline. Using this equipment with two workers to cooperate with the operation, the coordinates of the prestressed pipeline can be precisely controlled, so that the whole pipeline is round and smooth, and the vertical, horizontal and vertical alignment of the pipeline is ensured. The vertical position is accurate, thereby reducing the stress loss in the tension of the prestressed steel strand.

Beneficial effects compared with prior art:

1) Compared with the traditional prestressed pipeline positioning method, the locator of the present invention can accurately locate the vertical, horizontal and vertical prestressed pipeline coordinates, which has a great effect on improving the smoothness of the prestressed pipeline;

2) Lightweight, portable, can be processed anywhere, low production cost, convenient and fast to use;

3) It can position multiple prestressed pipes on the beam body section at one time, with small investment and high production efficiency, and is suitable for the positioning of prestressed pipes in large PC beam prefabrication yards;

4) Benefit comparison

① Traditional pipeline positioning requires 4 people to work, that is, 2 people weld and position the steel bars in front, and 2 people wear the pipeline. With this locator, only 2 people need to measure the position while wearing the pipeline, weld and position the steel bars and adjust the pipeline. Economical In terms of benefits, there are certain economic benefits and savings compared with traditional methods;

② Compared with the traditional method, using this locator to locate the prestressed pipeline has greatly improved the quality in terms of the longitudinal, horizontal and vertical coordinates of the pipeline, and the overall smoothness of the pipeline, which can reduce the loss of prestressed tension and improve the permanent prestress of the beam body. , and then improve the bearing capacity of the beam has very good social benefits.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a schematic structural view of the diagonal brace in Fig. 1;

Fig. 4 is a schematic structural view of the sliding sleeve in Fig. 1;

Fig. 5 is the structural representation of positioning ruler in Fig. 1;

In the figure: 1-base; 2-vertical scale; 3-horizontal scale; 4-diagonal strut; 5-level bubble; 6-bellows; 7-first longitudinal sliding sleeve; 8-first horizontal sliding sleeve; 9-the second longitudinal sliding sleeve; 10-the second horizontal sliding sleeve; 11-the third horizontal sliding sleeve; 12-caliper; 13-locating nut; 14-top tightening screw.

Detailed ways

The PC beam prestressed pipeline three-dimensional locator, as shown in Figures 1 and 2, includes a base 1, a vertical scale 2 fixed on the base, and a horizontal scale 3 perpendicular to the vertical scale and movably connected through a sliding sleeve. A diagonal strut 4 is arranged between the horizontal scale and the horizontal scale. The two ends of the diagonal strut are respectively connected with the vertical scale and the horizontal scale. A level bubble 5 is fixed above one end of the horizontal scale. Positioning ruler for horizontal ruler movement. The vertical scale 2, the horizontal scale 3 and the diagonal brace 4 are all hollow pipes with a rectangular cross section. Among the above components, the base is used to fix the pipeline locator to prevent it from swinging from side to side and affect the accuracy of the positioning instrument; the vertical scale is used to accurately locate the position of the prestressed pipeline in the vertical section as a scale, the unit is mm; the horizontal scale is used To accurately locate the coordinate ruler of the horizontal position of the prestressed pipe in the positioning section, the unit is mm; the diagonal brace is used to fix the position of the horizontal ruler and the vertical ruler to keep them perpendicular to each other; the level bubble is used to adjust the horizontal ruler to keep it Horizontal position; the sliding sleeve enables the horizontal scale and vertical scale to move freely, and accurately locate the coordinates of the pipeline; the positioning scale is used to locate the scales on both sides of the horizontal position of the pipeline.

As shown in Figure 4, the sliding sleeve is composed of the first longitudinal sliding sleeve 7 which is movably fitted on the vertical scale and the first transverse sliding sleeve 8 which is vertically fixed to the first longitudinal sliding sleeve; as shown in Figure 3, the diagonal brace 4. One end is provided with a second longitudinal sliding sleeve 9 that slides with the vertical scale, and the other end is hinged with a second horizontal sliding sleeve 10 that slides with the horizontal scale. As shown in Figure 5, the two positioning scales are composed of a third horizontal sliding sleeve 11 that is slidably matched with the horizontal scale, and a caliper 12 fixed on one end edge above the third horizontal sliding sleeve, and the positions of the calipers on the two positioning scales are mutually symmetrical. . The first longitudinal sliding sleeve 7, the first transverse sliding sleeve 8, the second longitudinal sliding sleeve 9, the second transverse sliding sleeve 10, and the third transverse sliding sleeve 11 all have positioning holes, and the positions opposite to the positioning holes are installed with The positioning nut 13 is provided with a tightening screw rod 14 through the positioning nut.

The specific operation process is as follows:

(1) The mold of the steel bar binding table is made of section steel, and the slots are cut longitudinally according to the spacing of the steel bars to ensure accurate positioning of the steel bars and easy operation.

(2) The beam body ballast groove slab reinforcement and the beam bottom web reinforcement are separately bound, and the beam bottom web reinforcement and the prestressed channel positioning network are bound and formed on the reinforcement binding platform. There are fixed steel bars and pre-embedded tire clamps on the steel bar binding platform to ensure that their positions are relatively accurate.

(3) Use a gantry crane to hoist it into the beam-making pedestal. Then adjust and supplement the steel bars and install the embedded parts.

(4) Accurately calculate the specific coordinate position of the PC beam pipe through the drawings of the design unit;

(5) Stake out the size of the PC beam on site and check it with the specific position of the drawing;

(6) Determine the longitudinal position of the PC beam bellows according to the notch of the pedestal template or use a steel tape, and record the position with a marker;

(7) When positioning the pipeline, loosen the tightening screw of the first longitudinal sliding sleeve and the second longitudinal sliding sleeve at one end of the diagonal brace, so that the sliding sleeve and the horizontal scale are in a free state, and then calculate the current section according to the drawing coordinates Slowly move the horizontal scale on the vertical scale to make it reach the ordinate position of the drawing design, then tighten the jacking screws on the first longitudinal sliding sleeve and the second longitudinal sliding sleeve to fix it in the vertical position;

(8) Then calculate the transverse coordinates of the current section according to the design drawings, unscrew the tightening screw of the first transverse sliding sleeve and the second transverse sliding sleeve at one end of the diagonal brace, so that the sliding sleeve and the transverse scale are in a free state, and then horizontally according to the drawings Coordinates, slowly move the horizontal scale left and right to the actual horizontal coordinate position of the design drawing, then tighten the tightening screws on the first horizontal sliding sleeve and the second horizontal sliding sleeve, and then loosen the top tightening screw on the third horizontal sliding sleeve on the positioning scale , move the two positioning scales left and right, respectively locate the left and right positions of the PC beam channel, and finally tighten the jacking screw of the third transverse sliding sleeve to fix it.

(9) Mark the horizontal steel bars and steel bar brackets at the welding positioning scale;

(10) Before installing the pipeline, it is necessary to ensure its smoothness. If the pipeline is not smooth, it will not only make it difficult to wear the reinforcement, but also generate a lot of frictional resistance, which will affect the accuracy of the tension; the linearity of the pipeline should be guaranteed to be smooth, and the joints will not leak slurry, etc.;

(11) When installing the pipe, the burrs, curls and corners at the end should be removed, and the straight line and smooth curve of the pipe should be strictly ensured. The pressure drop is unobstructed and does not leak;

(12) After the pipeline is installed in place, it is necessary to tie the bellows and the steel bar bracket together with iron wire or weld a steel bar on the top of the bellows to prevent the bellows from floating up when pouring concrete and causing serious quality accidents.

(13) After the corrugated pipe is installed, the joints should be sealed with plastic tape, and then the closed water test should be started from the grouting hole to check whether the corrugated pipe leaks, and the leak should be sealed with plastic tape. The lowest part of the pipe starts to drain the water in the bellows;

(14) Closed bellows.

Claims (6)

1. girder pre-stressed pipeline three-dimensional locating device of PC, it is characterized in that comprising base (1), be fixed on the base vertical scale (2) and with mutual vertical and the horizontal scale (3) by the sliding sleeve flexible connection of vertical scale, be provided with hound (4) between vertical scale and the horizontal scale, the hound two ends are flexibly connected with vertical scale, horizontal scale respectively, laterally scale one end top is fixed with air level (5), and laterally the scale other end is provided with two Position Scales that can move along horizontal scale.

2. the girder pre-stressed pipeline three-dimensional locating device of PC according to claim 1 is characterized in that described vertical scale (2), horizontal scale (3) and hound (4) are the hollow tube that cross section is rectangle.

3. the girder pre-stressed pipeline three-dimensional locating device of PC according to claim 1 is characterized in that described sliding sleeve is made of with vertical the first fixing horizontal sliding sleeve (8) with first vertical sliding sleeve first vertical sliding sleeve (7) of movable set on vertical scale.

4. the girder pre-stressed pipeline three-dimensional locating device of PC according to claim 1, it is characterized in that described hound (4) one ends are provided with the second vertical sliding sleeve (9) that is slidingly matched with vertical scale, the other end is hinged with the second horizontal sliding sleeve (10) that is slidingly matched with horizontal scale.

5. the girder pre-stressed pipeline three-dimensional locating device of PC according to claim 1, it is characterized in that described two Position Scales consist of by the 3rd horizontal sliding sleeve (11) that is slidingly matched with horizontal scale, the slide calliper rule (12) that are fixed on the 3rd horizontal sliding sleeve top one end margin, the slide calliper rule position on two Position Scales is symmetrical.

6. according to claim 3 to the girder pre-stressed pipeline three-dimensional locating device of 5 described PC, it is characterized in that all having locating hole on first vertical sliding sleeve (7), the first horizontal sliding sleeve (8), second vertical sliding sleeve (9), the second horizontal sliding sleeve (10) and the 3rd horizontal sliding sleeve (11), the position relative with position of positioning hole is equipped with setscrew nut (13), runs through in the setscrew nut fastening screw (14) is set.

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