CN-117385764-B - Template pre-assembling method

CN117385764BCN 117385764 BCN117385764 BCN 117385764BCN-117385764-B

Abstract

The invention relates to the field of template preassembly, and discloses a template preassembly method which comprises the following steps of firstly preparing a field level, a three-dimensional model, a plurality of templates and horizontal connecting pieces, determining the plane position of the templates on the field level, arranging a plurality of targets on the field level, measuring target coordinates by using a total station, secondly, importing the target coordinates into three-dimensional software, importing the target coordinates into the three-dimensional model according to the target coordinate position, thirdly, assembling a first-layer template, measuring the corner points of the templates by using the total station, roughly adjusting the templates, fourthly, measuring the target coordinates by using a three-dimensional scanner, converting the in-field coordinates into point cloud coordinates, collecting point cloud data of the templates, establishing a point cloud model, thirdly, finely adjusting the templates by using the three-dimensional model and the point cloud model, secondly, connecting two groups of horizontal connecting pieces and welding each group of horizontal connecting pieces between adjacent templates by using bolts, and saving the field measurement time.

Inventors

XIONG BIN
JIN CHUAN
SHEN NAN
ZHOU YIN
Wei Mingzhuan
YAN DONGJIE
TANG WEI
FAN XIANBIN

Assignees

中交一公局第七工程有限公司

Dates

Publication Date: 20260505
Application Date: 20231130

Claims (4)

1. A method of pre-assembling a template, comprising the steps of: Step one, preparing a field level, a three-dimensional model, a plurality of templates and horizontal connecting pieces, determining the plane position of the templates on the field level, arranging a plurality of targets on the field level, and measuring the coordinates of the targets by using a total station; step two, importing target coordinates into three-dimensional software, and importing a three-dimensional model according to the target coordinate positions; assembling the first-layer template, measuring the corner points of the template by using a total station, and carrying out coarse adjustment on the template; measuring target coordinates through a three-dimensional scanner, converting the coordinates in a field into point cloud coordinates, collecting point cloud data of a template, and establishing a point cloud model; fifthly, performing three-dimensional deviation comparison on the three-dimensional model and the point cloud model, and performing fine adjustment on the model; step six, two groups of horizontal connecting pieces are connected through bolts, and each group of horizontal connecting pieces are welded between adjacent templates; In the first step, the target comprises a plurality of plane points and scanning points, wherein the plane points are arranged on the plane position of the template, a prism ball is placed on the scanning points, the scanning points are the circle centers of the prism ball, and the coordinates of the plane points and the scanning points on the plane position are measured by adopting a total station; in the fourth step, the coordinates of the target measured by the three-dimensional scanner are the coordinates of the scanning points; The outer side of the template is provided with a plurality of back ribs, both ends of each back rib are provided with inclined pull rods and two nuts, and both ends of each inclined pull rod penetrate through the two inclined pull seats and are in threaded connection with the two nuts; step three, preparing a supporting piece, supporting the template through the supporting piece, and enabling the template to be enclosed into a rectangle, thereby completing the assembly of the first-layer template; connecting adjacent templates through diagonal rods, and adjusting the relative positions of the adjacent templates through rotating two nuts; the side edges of the templates are respectively provided with a reinforcing part, the inner sides of the reinforcing parts are provided with chamfer surfaces, and the horizontal connecting pieces are arranged on the outer sides of the reinforcing parts; in the third step, after the adjacent templates are vertically spliced, the chamfer faces of the two reinforcing parts are stuck together; The horizontal connecting piece comprises a vertical connecting plate which is vertically arranged and a plurality of arc plates which are horizontally arranged, both ends of each arc plate are respectively connected with the outer side of the reinforcing part and the side surface of each vertical connecting plate, one side of each vertical connecting plate, which is far away from each arc plate, is a connecting surface of two horizontal connecting pieces, and the connecting surfaces are connected through bolts; in the sixth step, two horizontal connecting pieces are combined, two vertical connecting plates are connected through bolts, and arc plates of the two horizontal connecting pieces are welded with the outer sides of two adjacent templates respectively.
2. The method of pre-assembling a form according to claim 1, wherein in step six, after the horizontal connecting piece is welded, the rectangular bridge pier is poured in the form, and after the form is removed, whether the corner points of the rectangular bridge pier are staggered is checked.
3. The method for preassembling the templates according to claim 1, wherein in the sixth step, after arc plates of the horizontal connecting pieces are welded, a second layer of templates is erected, vertical connecting pieces are welded on the upper side and the lower side of the templates respectively, the vertical connecting pieces comprise a horizontal connecting plate and a plurality of triangular supporting plates which are vertically arranged, the supporting plates are connected with the outer sides of the reinforcing parts and the lateral sides of the horizontal connecting plates, and the upper layer of templates and the lower layer of templates are connected through the vertical connecting pieces.
4. The method of pre-assembling a mold plate according to claim 3, wherein in step six, the back ridge can completely block the vertical connecting piece at the lower side of the mold plate, a hollow hole is formed between two arc plates at the same height of a group of horizontal connecting pieces, and the hollow hole is in continuous contact with the chamfer.

Description

Template pre-assembling method Technical Field The invention relates to the field of template preassembly, in particular to a template preassembly method. Background When designing the rectangular bridge pier templates, a simple quality detection is performed in a manufacturing field, the templates are not pre-assembled, and a fixed connection mode is not adopted, so that each template is in a free state and is not fixedly matched. Thus, as each segment is cast, the template now in use requires template positioning with a total station prior to each cast to determine the template position. The method for measuring and determining the perpendicularity of the template adopts a plumb line method to measure, namely, a plumb is fixed at the top of the template, and the distance between the plumb lines at the top and the bottom of the template and the template is measured, so that the perpendicularity of the template is determined. Thus, measuring and positioning the template each time the rectangular pier is poured can take a lot of time, and the on-site platform construction machinery can affect the template measurement. Disclosure of Invention The invention aims to provide a template pre-assembly method, which saves on-site measurement time. In order to achieve the purpose, the invention adopts the following technical scheme that the template pre-assembling method comprises the following steps: firstly, preparing a field level, a three-dimensional model, a plurality of templates and horizontal connecting pieces, determining the plane position of the templates on the field level, arranging a plurality of targets on the field level, and measuring the coordinates of the targets by using a total station; step two, importing target coordinates into three-dimensional software, and importing a three-dimensional model according to the target coordinate positions; assembling the first-layer template, measuring the corner points of the template by using a total station, and carrying out coarse adjustment on the template; measuring target coordinates through a three-dimensional scanner, converting the coordinates in a field into point cloud coordinates, collecting point cloud data of a template, and establishing a point cloud model; fifthly, performing three-dimensional deviation comparison on the three-dimensional model and the point cloud model, and performing fine adjustment on the model; And step six, two groups of horizontal connecting pieces are connected through bolts, and each group of horizontal connecting pieces are welded between adjacent templates. The beneficial effect of this scheme is: 1. And the position and the perpendicularity of the template are adjusted by comparing the three-dimensional deviation of the point cloud model based on the BIM model, so that the precision of the template leaving the factory is improved, and the perpendicularity of the assembled template is ensured. 2. The perpendicularity of the assembled templates is guaranteed, the measurement workload in field construction is reduced, and accordingly the field measurement time is saved. 3. Compared with the manual measurement by adopting the vertical line method, the three-dimensional scanning instrument is adopted in the scheme for detection, the accuracy is higher, the subjective judgment of the person has weaker influence, and the sufficient precision is achieved. 4. After detection, the template is welded and fixed through the horizontal connecting pieces, so that the shape of the assembled template is fixed, then bolts between each group of horizontal connecting pieces are removed, and the template is disassembled so as to be transported to the site for assembly. In the first step, the target comprises a plurality of plane points and scanning points, wherein the plane points are arranged on the plane position of the template, a prism ball is placed on each scanning point, each scanning point is the center of the prism ball, and the coordinates of the plane point and the scanning point on the plane position are measured by a total station; In the fourth step, the coordinates of the target measured by the three-dimensional scanner are the coordinates of the scanning point. Further, a plurality of back ribs are arranged on the outer side of the template, inclined pull rods and two nuts are arranged between the inclined pull seats of the adjacent templates, and the two ends of the inclined pull rods penetrate through the two inclined pull seats and are in threaded connection with the two nuts; step three, preparing a supporting piece, supporting the template through the supporting piece, and enabling the template to be enclosed into a rectangle, thereby completing the assembly of the first-layer template; and fifthly, the fine adjustment mode is that adjacent templates are connected through diagonal draw bars, and the relative positions of the adjacent templates are adjusted through rotating two nuts. Furthermore, the side edges of the