CN110657777A - Wind tunnel body surcharge preloading deformation measurement process - Google Patents
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Abstract
The invention discloses a wind tunnel body surcharge preloading deformation measurement process, which is used for respectively carrying out point arrangement measurement on a template plane, a vertical frame body and a frame body foundation of wind tunnel body construction. The method comprises the following steps: the principle of template plane distribution, the method of triangle point deformation measurement, the principle of vertical frame distribution, the principle of frame foundation distribution and the like. The deformation measurement process can obtain high-precision and omnibearing preloading deformation values, provides detailed analysis data for deformation analysis of foundations, frames and templates, and can be popularized and used in various buildings with high requirements on concrete pouring deformation precision. Therefore, the method has high use value and popularization value.
Description
Technical Field
The invention relates to the field of building construction measurement, in particular to a process for measuring the preloading deformation of a wind tunnel body.
Background
The preloading is one of the methods for treating soft soil foundation, namely the preloading drainage consolidation method. The method is characterized in that prepressing is loaded on the site, so that pore water in the soil body is discharged along the drainage plate and gradually solidified, the foundation is settled, and the strength is gradually improved.
The principle of preloading: in order to simulate the deformation of the support body in the concrete pouring process, in the support body building process of the support system, the inelastic deformation of the support frame is eliminated by adopting a pre-pressing and stacking method, the amount of the elastic deformation is measured, and finally the elastic deformation is counteracted in a support system pre-arching mode.
Implementation of the deformation measurement: the deformation measurement can be divided into the following steps according to the step of preloading: measurement before stacking, measurement during stacking and measurement after unloading. The deformation measurement can be divided into: template plane measurement, support body vertical measurement and support body foundation measurement.
Most of the existing preloading technologies only aim at eliminating inelastic deformation, the measurement and control of elastic deformation are basically not considered in a key way, relevant specifications and technical instruction documents of preloading deformation measurement are not related at home temporarily, but elastic deformation is particularly important for buildings with extremely high position degree requirements (the position degree deviation is less than or equal to 3mm), and meanwhile, due to the complex conditions of construction sites, the precision of an elastic deformation value simulated by software cannot be directly used for construction, and the preloading of each section of construction must be independently carried out and measured.
Disclosure of Invention
The invention aims to provide a wind tunnel body surcharge preloading deformation measurement process, which mainly solves the problems of low precision of an elastic deformation value simulated by the existing software and inconvenience in surcharge preloading measurement.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a wind tunnel body surcharge preloading deformation measurement process is characterized in that point arrangement measurement is respectively carried out on a template plane, a vertical frame body and a frame body foundation of wind tunnel body construction;
(S1) the measuring of the pre-load deflection on the plane of the die plate includes the steps of:
(S10) due to the difference of the frame erection and the building structure form, the prepressing deformations of different structure positions in the same template plane are completely different, and the same structure points are selected as a group of measuring positions;
(S11) measuring the surcharge pre-stress deformation of each measurement point in each set of measurement positions, respectively, and measuring the total deformation by the average value of the surcharge pre-stress deformation of each set of measurement positions;
(S2) measuring the preloading deformation of the vertical frame body by the aid of the method comprises the following steps:
(S20) arranging measuring points on each section of steel pipe of the vertical frame body;
(S21) measuring the preloading deformation of each measurement point, respectively, and measuring the total deformation by averaging the preloading deformation of each measurement point;
(S3) the measurement of the preloading deformation of the frame foundation comprises the following steps:
(S30) transmitting all load on the frame body to the cushion layer through the steel pipe, so that deformation near the steel pipe is measured, the bottom of the steel pipe is taken as the center of an equilateral triangle, and three angular points of the equilateral triangle are set as measuring points on the basis of the frame body;
(S31) measuring three-point average values of the preloading deformation of the frame body foundation.
Further, in the step (S10), three sets of measurement positions are selected, and are respectively marked as a set of measurement positions, B set of measurement positions, and C set of measurement positions.
Furthermore, the A group of measurement positions are template angular point positions at the intersection of the beam and the beam, and are 4 measurement positions in total, and 1 measurement point is distributed at each measurement position, and is 4 measurement points in total; in the step (S11), the a-group measurement position total deformation amount is averaged for each corner point.
Further, the B group of measurement positions are the measurement positions of each template edge line arranged at the quartering position, and the total number of the measurement positions is 12, and each measurement position is provided with 1 measurement point and 12 measurement points; in the step (S11), the B-group measurement position total deformation amount measures an average value of the respective edge deformation amounts, and the respective edge deformation amounts measure an average value of three points for each template edge.
Furthermore, the group C of measurement positions are 9 measurement positions in total at the center of each nine-grid after the plane of the template is divided into nine-grid grids, and each measurement position is provided with 3 measurement points in total at 27 measurement points; and C group of measurement position total deformation amount is an average value of the deformation amount of each measurement position.
Further, in the C groups of measurement points, the deformation average value of each measurement position is a triangle point layout deformation measurement method, which specifically includes the following steps:
a: randomly laying one point, then laying another point along the direction which forms an angle of 30 degrees with the batten keel and has the length of 3 times the width L of the batten keel, and finally determining a third point according to an equilateral triangle principle;
b: and measuring data of three points, and when the data of one point in the three-point measurement data has larger deviation with the data of the other two points, abandoning the data of the point and using the data of the other two points to calculate the average value.
Further, in the step (S20), the measuring points are respectively arranged at positions of each section of steel pipe 50cm away from the upper part and 50cm away from the lower part, and the two control points of the upper and lower sections of steel pipe are ensured to be just 1 meter apart.
Further, in the step (S30), the side length of the equilateral triangle is determined according to the frame pitch.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method carries out split measurement on the preloading deformation measurement in the wind tunnel construction, respectively carries out point distribution measurement on the plane of the template, the vertical frame body and the frame body foundation, adopts different distribution methods for different measurement objects, adopts a method of multi-point measurement and averaging to obtain a high-precision and omnibearing preloading deformation value, provides detailed analysis data for deformation analysis of the foundation, the frame body and the template, and can be popularized and used in various buildings with high requirements on concrete pouring deformation precision.
(2) When the template plane is subjected to point distribution measurement, a triangular point deformation measurement method is adopted, so that the problem that the position of a batten keel below the template cannot be observed when the template center is subjected to point distribution, the position of the batten keel is not selected skillfully, and the accuracy of a measurement result is influenced is avoided. By the method, at least two points are not arranged on the batten keel, when one point of the three-point measurement data has larger deviation with the other two points, the point data is abandoned, and the average value is obtained by applying the other two points of data, so that the measurement accuracy is improved.
Drawings
FIG. 1 is a flow chart of the measurement process of the present invention.
FIG. 2 is a layout diagram of the A and B groups of measurement positions in the template plane.
FIG. 3 is a layout diagram of C sets of measurement positions in the plane of the template according to the present invention.
FIG. 4 is a layout diagram of C sets of measurement points in the plane of the template according to the present invention.
FIG. 5 is a schematic diagram of a triangular point deformation measurement layout according to the present invention.
Fig. 6 is a schematic diagram of the frame foundation arrangement of the present invention.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Examples
As shown in fig. 1, the technique for measuring the preloading deformation of the wind tunnel body disclosed by the invention is used for respectively carrying out point distribution measurement on a template plane, a vertical frame body and a frame body foundation in the construction of the wind tunnel body.
(S1) the measuring of the pre-load deflection on the plane of the die plate includes the steps of:
(S10) due to the difference of the frame erection and the building structure form, the pre-pressing deformation of different structure positions in the same template plane is completely different, and the same structure points are selected as a group of measuring positions. As shown in fig. 2 and 3, three sets of measurement positions are selected and respectively marked as a set of measurement positions, B set of measurement positions, and C set of measurement positions.
(S11) the preload deformation amount of each measurement point in each set of measurement positions is measured separately, and the total deformation amount is an average value of the preload deformation amounts of each set of measurement positions. The A group of measurement positions are template angular point positions at the intersection of the beam and the beam, 4 measurement positions are provided in total, 1 measurement point and 4 measurement points are distributed at each measurement position, and the average value of each angular point is measured by the total deformation of the A group of measurement positions. The B groups of measurement positions are 12 measurement positions of each template edge line arranged at the quartering position, and each measurement position is provided with 1 measurement point and 12 measurement points. And B, measuring the total deformation of the measuring positions to obtain the average value of the deformation of each sideline, and measuring the three-point average value of each template sideline by using the deformation of each sideline. As shown in fig. 4, the C groups of measurement positions are 9 measurement positions in total at the center measurement position of each nine-grid after the template plane is divided into nine-grid grids, and 3 measurement points are arranged at each measurement position, and are recorded as D points, and 27 measurement points in total are arranged at each measurement position. And C group of measurement position total deformation amount is an average value of the deformation amount of each measurement position.
In the C group of measuring points, because the position of the batten keel below the template cannot be observed when the center of the template is distributed, if the position of the batten keel is not selected skillfully when the center of the template is distributed, the precision of a measuring result can be influenced, and in order to solve the problem, a triangle point distribution deformation measuring method is adopted for the average value of the deformation of each measuring position in an innovative way, and the method specifically comprises the following steps:
a: randomly laying one point, then laying another point along the direction which forms an angle of 30 degrees with the batten keel and has the length of 3 times the width L of the batten keel, and finally determining a third point according to an equilateral triangle principle;
b: and measuring data of three points, and when the data of one point in the three-point measurement data has larger deviation with the data of the other two points, abandoning the data of the point and using the data of the other two points to calculate the average value.
(S2) measuring the preloading deformation of the vertical frame body by the aid of the method comprises the following steps:
(S20) in order to analyze the change condition of the vertical frame body in inelastic deformation and elastic deformation in detail, measuring points are distributed on each section of steel pipe of the vertical frame body, as shown in figure 5, the measuring points are respectively distributed at the positions of each section of steel pipe, 50cm away from the upper part and 50cm away from the lower part, two control points of the upper section of steel pipe and the lower section of steel pipe are ensured to be just 1 meter apart, and elastic deformation calculation and actual operation control are facilitated.
(S21) the preload deformation amounts at the respective measurement points are measured, and the total deformation amount is an average value of the preload deformation amounts at the respective measurement points.
(S3) the measurement of the preloading deformation of the frame foundation comprises the following steps:
(S30) when the foundation or the bedding of the frame foundation is vertically deformed, the accuracy of the measurement result is affected, so that a measurement point needs to be set on the concrete bedding under the frame. As shown in fig. 6, all the load on the frame body is transferred to the cushion layer through the steel pipe, so that deformation near the steel pipe is measured, the bottom of the steel pipe is taken as the center of the equilateral triangle, three angular points of the equilateral triangle are set on the basis of the frame body as measuring points, which are marked as points E, and the side length of the equilateral triangle is determined according to the distance between the frame bodies.
(S31) measuring three-point average values of the preloading deformation of the frame body foundation.
The method carries out split measurement on the preloading deformation measurement in the wind tunnel construction, respectively carries out point distribution measurement on the plane of the template, the vertical frame body and the frame body foundation, adopts different distribution methods for different measurement objects, adopts a method of multi-point measurement and averaging to obtain a high-precision and omnibearing preloading deformation value, provides detailed analysis data for deformation analysis of the foundation, the frame body and the template, and can be popularized and used in various buildings with high requirements on concrete pouring deformation precision. Therefore, the method has high use value and popularization value.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (8)
1. A wind tunnel body surcharge preloading deformation measurement process is characterized in that point arrangement measurement is respectively carried out on a template plane, a vertical frame body and a frame body foundation of wind tunnel body construction;
(S1) the measuring of the pre-load deflection on the plane of the die plate includes the steps of:
(S10) due to the difference of the frame erection and the building structure form, the prepressing deformations of different structure positions in the same template plane are completely different, and the same structure points are selected as a group of measuring positions;
(S11) measuring the surcharge pre-stress deformation of each measurement point in each set of measurement positions, respectively, and measuring the total deformation by the average value of the surcharge pre-stress deformation of each set of measurement positions;
(S2) measuring the preloading deformation of the vertical frame body by the aid of the method comprises the following steps:
(S20) arranging measuring points on each section of steel pipe of the vertical frame body;
(S21) measuring the preloading deformation of each measurement point, respectively, and measuring the total deformation by averaging the preloading deformation of each measurement point;
(S3) the measurement of the preloading deformation of the frame foundation comprises the following steps:
(S30) transmitting all load on the frame body to the cushion layer through the steel pipe, so that deformation near the steel pipe is measured, the bottom of the steel pipe is taken as the center of an equilateral triangle, and three angular points of the equilateral triangle are set as measuring points on the basis of the frame body;
(S31) measuring three-point average values of the preloading deformation of the frame body foundation.
2. The wind tunnel body surcharge preloading deformation measurement process of claim 1, wherein in the step (S10), three groups of measurement positions are selected in total, and are respectively marked as a group a measurement position, a group B measurement position and a group C measurement position.
3. The wind tunnel body surcharge preloading deformation measurement process according to claim 2, wherein the A group of measurement positions are template angular point positions at the intersection of the beams, 4 measurement positions in total, and 1 measurement point is arranged at each measurement position, 4 measurement points in total; in the step (S11), the a-group measurement position total deformation amount is averaged for each corner point.
4. The wind tunnel body surcharge preloading deformation measurement process of claim 3, wherein the B group of measurement positions are 12 measurement positions where each template side line is arranged at the position of a quartering point, and each measurement position is provided with 1 measurement point and 12 measurement points; in the step (S11), the B-group measurement position total deformation amount measures an average value of the respective edge deformation amounts, and the respective edge deformation amounts measure an average value of three points for each template edge.
5. The wind tunnel body preloading deformation measurement process according to claim 4, wherein the C groups of measurement positions are 9 measurement positions in total for the central measurement position of each nine-grid after the template plane is divided into nine-grid cells, and 3 measurement points are arranged in each measurement position, and 27 measurement points are arranged in total; and C group of measurement position total deformation amount is an average value of the deformation amount of each measurement position.
6. The wind tunnel body surcharge preloading deformation measurement process according to claim 5, wherein in the C groups of measurement points, the deformation average value of each measurement position adopts a triangular point layout deformation measurement method, which specifically comprises the following steps:
a: randomly laying one point, then laying another point along the direction which forms an angle of 30 degrees with the batten keel and has the length of 3 times the width L of the batten keel, and finally determining a third point according to an equilateral triangle principle;
b: and measuring data of three points, and when the data of one point in the three-point measurement data has larger deviation with the data of the other two points, abandoning the data of the point and using the data of the other two points to calculate the average value.
7. The wind tunnel body surcharge preloading deformation measurement process of claim 1, wherein in the step (S20), the measurement points are respectively arranged at the positions of each section of steel pipe 50cm away from the upper part and 50cm away from the lower part, so as to ensure that two control points of the upper and lower sections of steel pipe are just 1 meter apart.
8. The wind tunnel body preloading deformation measuring process of claim 1, wherein in the step (S30), the side length of the equilateral triangle is determined according to the frame pitch.
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