Construction method for improving absolute position acquisition precision of original structure column grid

Abstract

The invention discloses a construction method for improving the absolute position acquisition precision of an original structure column grid. The construction method comprises the following steps: 1, introducing control points into an existing building; 2, mounting a laser range finder in the existing building in a sliding manner; 3, when the laser range finder slides, projecting two points to each cylindrical surface of each original structure column position to form laser receiving points; 4, acquiring absolute plane position coordinates of each laser receiving point through a laser range finder; 5, two laser receiving points on each cylindrical surface are connected to form a laser positioning line, extension lines of the laser positioning lines on two adjacent cylindrical surfaces intersect, and the extension lines of the laser positioning lines on all cylindrical surfaces on the original structure column position enclose to form a section contour of the original structure column position; and calculating the absolute plane position coordinates of the original structure column position through the absolute plane position coordinates of all the laser receiving points. The invention relates to the technical field of existing building reconstruction and extension projects, and can solve the problems of low absolute position acquisition precision and time and labor waste of an original structure column grid in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of existing building renovation and expansion engineering, and in particular to a construction method for improving the absolute position acquisition accuracy of an original structural column grid. Background Art

[0002] With the increasing demand for urban renewal, the demand for renovation and expansion of existing buildings in the city has also increased. When renovating and expanding existing buildings, the absolute position information of the original structural column grid is one of the important design bases for the early stage of renovation and expansion of existing buildings. Therefore, it is necessary to collect the absolute position of the original structural column grid of the existing building. The conventional method for collecting the absolute position information of the original structural column grid is to introduce the measurement control points into the interior of the existing building, and then install the total station measuring instrument based on the control points, and use the total station measuring instrument to collect the absolute position coordinate information of each column position.

[0003] The collection of the absolute position coordinate information of each original structural column position requires at least the collection of the coordinates of the three corner points on the original structural column position. The dense original structural column network often blocks the sight of the measuring instrument. During the coordinate information collection process, the position of the total station measuring instrument needs to be constantly moved, resulting in the continuous accumulation of measurement errors and human operation errors, which leads to a serious decrease in the collection accuracy of the absolute position of the original structural column network, and also consumes a lot of physical energy of the surveying personnel. Therefore, it is necessary to provide a construction method for improving the absolute position collection accuracy of the original structural column network, which can solve the problems of low absolute position collection accuracy and time-consuming and labor-intensive of the original structural column network in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a construction method for improving the absolute position acquisition accuracy of the original structure column grid, which can solve the problems of low absolute position acquisition accuracy and time-consuming and labor-intensive of the original structure column grid in the prior art.

[0005] The present invention is achieved in that:

[0006] A construction method for improving the absolute position acquisition accuracy of an original structural column grid comprises the following steps:

[0007] Step 1: Introduce at least two control points in the existing building;

[0008] Step 2: Slidably install a laser rangefinder in the existing building, and enable the laser rangefinder to project a laser onto each column surface of each original structural column;

[0009] Step 3: The laser rangefinder projects at least two points onto each cylindrical surface of each original structural column while sliding, forming at least two laser receiving points on each cylindrical surface;

[0010] Step 4: Obtain the absolute plane position coordinates of each laser receiving point through a laser rangefinder;

[0011] Step 5: At least two laser receiving points on each column are connected to form a laser positioning line, and the extension lines of the laser positioning lines on two adjacent columns intersect, so that the extension lines of the laser positioning lines on all columns on the original structural column position are enclosed to form a cross-sectional profile of the original structural column position;

[0012] Step 6: Calculate the absolute plane position coordinates of the original structure column through the absolute plane position coordinates of all laser receiving points on the cross-sectional profile.

[0013] The control points are secondary benchmark control points introduced into the interior of existing buildings, and are introduced by setting layout holes using a high-precision total station measuring instrument.

[0014] The step 2 comprises the following sub-steps:

[0015] Step 2.1: Lay guide rails on the bottom surface of the existing building, the guide rails include a first guide rail circumferentially surrounding the outside of the original structural column grid and a second guide rail arranged inside the first guide rail and located beside the original structural column position, and a guide rail parallel to the column surface is provided beside each column surface;

[0016] Step 2.2: Install the pulley at the bottom of the sliding bracket;

[0017] Step 2.3: Slidingly embed the pulley into the guide rail so that the sliding bracket can be slidably installed in the existing building;

[0018] Step 2.4: The laser rangefinder is fixedly mounted on the sliding bracket, and the laser emission of the laser rangefinder is set vertically toward the cylindrical surface.

[0019] Two laser receiving points are projected onto each of the cylinders, and the length of the line connecting the two laser receiving points is smaller than the width of the cylinder. During the sliding process of the laser rangefinder, the position where the laser rangefinder emits the laser is synchronously recorded.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention is provided with a guide rail, a sliding bracket, a pulley and a laser rangefinder. The pulley and the sliding bracket are used to slide the laser rangefinder along the guide rail which is straight and parallel to the cylindrical surface, so as to improve the collection efficiency and accuracy of the laser rangefinder for the absolute position information of the cylindrical surface, and facilitate the acquisition of the absolute position information of the original structure column position based on the control point, and calculate the absolute position information of the original structure column network, which not only greatly improves the accuracy and efficiency of the measurement and collection information, but also greatly reduces the difficulty of operation and the labor intensity and labor cost of the surveying personnel.

[0022] 2. The present invention uses a laser rangefinder to emit a laser beam to the cylindrical surface of the original structure column to form a laser receiving point. The laser positioning lines of the two laser receiving points determine a cylindrical surface. The extended lines of the laser positioning lines of each cylindrical surface determine the contour of the original structure column. Therefore, the absolute position information of the original structure column can be calculated based on the control point. The measurement method is simple and easy to operate, and the measurement result is accurate, which is beneficial to improving the quality of the later renovation and expansion project of the existing building, and has high application value and prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic plan view of a construction method for improving the absolute position acquisition accuracy of an original structural column grid according to the present invention;

[0024] Figure 2 It is a schematic elevation diagram of a construction method for improving the absolute position acquisition accuracy of an original structural column grid according to the present invention;

[0025] Figure 3 It is a plan view of the cylindrical laser receiving point of the construction method of the present invention for improving the absolute position acquisition accuracy of the original structure column network;

[0026] Figure 4 It is a schematic diagram of cylindrical contour line drawing of a construction method for improving the absolute position acquisition accuracy of the original structural column grid according to the present invention.

[0027] In the figure, 1 is the existing building, 2 is the control point, 3 is the laser rangefinder, 31 is the guide rail, 32 is the sliding bracket, 33 is the pulley, 4 is the original structure column position, 5 is the laser receiving point, and 6 is the laser positioning line. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] A construction method for improving the absolute position acquisition accuracy of an original structural column grid comprises the following steps:

[0030] Please see attached Figure 1 , Step 1: Introduce at least two control points 2 in the existing building 1.

[0031] The control point 2 is a secondary reference control point introduced into the interior of an existing building. It can be introduced by setting up layout holes using a high-precision total station measuring instrument. The method of introducing the control point 2 can be the same as the prior art and will not be repeated here.

[0032] Step 2: A laser rangefinder 3 is slidably installed in the existing building 1 , and the laser rangefinder 3 is enabled to project laser light onto each column surface of each original structural column position 4 .

[0033] Please see attached Figure 2 , the step 2 comprises the following sub-steps:

[0034] Step 2.1: Lay a guide rail 31 on the bottom surface of the existing building 1. The guide rail 31 includes a first guide rail circumferentially surrounding the outside of the original structural column grid and a second guide rail arranged inside the first guide rail and located beside the original structural column position 4. A guide rail 31 parallel to the column is provided on the side of each column surface. The guide rail 31 is used to provide guidance and limit for the sliding of the laser rangefinder 3.

[0035] When the guide rail 31 is laid on the ground, it is necessary to ensure that the guide rail 31 is straight, so as to ensure the smooth sliding and accurate measurement of the laser rangefinder 3. At the same time, in order to ensure that the laser rangefinder 3 can vertically project the laser beam on each cylindrical surface, a guide rail 31 parallel to it is arranged on the outside of each cylindrical surface. Since the laser rangefinder 3 slides along the guide rail 31, compared with the fixed measurement of the traditional total station measuring instrument, its measurement point will not be blocked or hindered, and the measurement information is collected with high accuracy.

[0036] Step 2.2: Install the pulley 33 at the bottom of the sliding bracket 32.

[0037] Preferably, the pulley 33 and the guide rail 31 use matching sliding components to ensure that the pulley 33 can slide stably and smoothly along the sliding bracket 32.

[0038] Step 2.3: Slidingly embed the pulley 33 in the guide rail 31 so that the sliding bracket 32 ​​can be slidably arranged in the existing building 1.

[0039] Step 2.4: The laser rangefinder 3 is fixedly mounted on the sliding bracket 32, and the laser emission of the laser rangefinder 3 is arranged vertically toward the cylindrical surface.

[0040] Preferably, the sliding bracket 32 ​​can adopt a triangular bracket, which has a stable structure and a strong bearing capacity, and can ensure the reliable installation of the laser rangefinder 3.

[0041] Please see attached Figure 3 , Step 3: The laser rangefinder 3 projects at least two points onto each cylindrical surface of each original structural column 4 while sliding, forming at least two laser receiving points 5 on each cylindrical surface.

[0042] Preferably, the axle of the pulley 33 can be controlled by a motor via a computer to achieve uniform rotation, so that when the laser rangefinder 3 slides through each cylinder, it can project at least two laser beams onto each cylinder, thereby forming at least two laser receiving points 5 on each cylinder. The rotation speed of the pulley 33 can be adaptively set according to the cylinder width.

[0043] Using a motor to control the rotation of the pulley 33 to achieve movement and steering along the guide rail 31 is a conventional operation method in the art and will not be described in detail here.

[0044] Two laser receiving points 5 are projected onto each of the cylinders, and the length of the line connecting the two laser receiving points 5 is slightly smaller than the width of the cylinder. During the sliding process of the laser rangefinder 3, the position where the laser rangefinder 3 emits the laser is synchronously recorded.

[0045] Preferably, the two laser receiving points 5 on each cylindrical surface should be kept as far apart as possible, so that the planar position information of the cylindrical surface can be determined by using the two laser receiving points 5 on the same cylindrical surface, making the planar position information of the cylindrical surface more accurate.

[0046] Each time the laser rangefinder 3 emits a laser, the emission position of the laser beam is recorded, which can be used to improve the control point 5 to determine the absolute position information of the laser receiving point 5 formed by the laser beam on the cylindrical surface, thereby facilitating the subsequent determination of the absolute position information of the cylindrical surface.

[0047] The original structural column position 4 is usually a rectangular column with four cylindrical surfaces. Two laser receiving points 5 are projected on each cylindrical surface, and there are 8 laser receiving points 5 in total.

[0048] Step 4: Obtain the absolute plane position coordinates of each laser receiving point 5 through the laser rangefinder 3.

[0049] The working principle of the laser rangefinder 3 is: the transmitting end of the laser rangefinder 3 transmits a laser beam to the target object, the laser beam is reflected on the surface of the target object, and the receiving end of the laser rangefinder 3 receives the reflected laser beam, thereby calculating the vertical distance between the laser rangefinder 3 and the target object.

[0050] Since the positions of the control point 2 and the guide rail 31 are determined, the absolute plane position coordinates of the laser receiving point 5 on the cylindrical surface within the existing building 1 can be calculated using the vertical distance between the laser rangefinder 3 and the target object.

[0051] Please see attached Figure 4 Step 5: At least two laser receiving points 5 on each cylindrical surface are connected to form a laser positioning line 6, and the extension lines of the laser positioning lines 6 on two adjacent cylindrical surfaces intersect, so that the extension lines of the laser positioning lines 6 on all cylindrical surfaces of the original structural column position 4 are enclosed to form the cross-sectional contour of the original structural column position 4.

[0052] Step 6: Calculate the absolute plane position coordinates of the original structure column 4 through the absolute plane position coordinates of all laser receiving points 5 on the cross-sectional profile.

[0053] Due to the introduction of the control point 2 and the fixed laying of the guide rail 31, based on the position information of the control point 2, the absolute plane position coordinates of at least 8 laser receiving points 5 on the original structure column position 4 can be used to determine the absolute plane position coordinates of the original structure column position 4 in the existing building 1, thereby realizing the absolute position acquisition of the original structure column network, avoiding the deployment of total station measuring instruments in traditional operations, and making the operation more convenient and less costly.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction method for improving the absolute position acquisition accuracy of the original structural column grid, characterized by: The following steps are involved: Step 1: Introduce at least two control points (2) in the existing building (1); Step 2: Slidably install a laser rangefinder (3) in the existing building (1), and enable the laser rangefinder (3) to project laser light onto each column surface of each original structural column position (4); Step 3: The laser rangefinder (3) projects at least two points onto each cylindrical surface of each original structural column position (4) while sliding, forming at least two laser receiving points (5) on each cylindrical surface; Step 4: Obtain the absolute plane position coordinates of each laser receiving point (5) through the laser rangefinder (3); Step 5: at least two laser receiving points (5) on each cylindrical surface are connected to form a laser positioning line (6), and the extension lines of the laser positioning lines (6) on two adjacent cylindrical surfaces intersect, so that the extension lines of the laser positioning lines (6) on all cylindrical surfaces on the original structural column position (4) are enclosed to form a cross-sectional profile of the original structural column position (4); Step 6: Calculate the absolute plane position coordinates of the original structure column position (4) through the absolute plane position coordinates of all laser receiving points (5) on the cross-sectional profile.

2. The construction method for improving the absolute position acquisition accuracy of the original structural column grid according to claim 1 is characterized by: The control point (2) is a secondary reference control point introduced into the interior of an existing building, and is introduced by setting holes for laying out lines using a high-precision total station measuring instrument.

3. The construction method for improving the absolute position acquisition accuracy of the original structural column grid according to claim 1 is characterized by: The step 2 comprises the following sub-steps: Step 2.1: laying a guide rail (31) on the bottom surface of the existing building (1), wherein the guide rail (31) comprises a first guide rail circumferentially surrounding the outer side of the original structural column grid and a second guide rail arranged inside the first guide rail and located beside the original structural column position (4), and a guide rail (31) parallel to the column surface is provided beside each column surface; Step 2.2: Install the pulley (33) at the bottom of the sliding bracket (32); Step 2.3: Slidingly embedding the pulley (33) in the guide rail (31) so that the sliding bracket (32) can be slidably arranged in the existing building (1); Step 2.4: The laser rangefinder (3) is fixedly mounted on the sliding bracket (32), and the laser emission of the laser rangefinder (3) is arranged vertically toward the cylindrical surface.

4. The construction method for improving the absolute position acquisition accuracy of the original structural column grid according to claim 1 is characterized by: Two laser receiving points (5) are projected onto each cylindrical surface, and the length of the line connecting the two laser receiving points (5) is smaller than the width of the cylindrical surface. During the sliding process of the laser rangefinder (3), the position where the laser rangefinder (3) emits laser light is synchronously recorded.

Images