CN204645103U - A kind of device measuring drag-line horizontal displacement of foundation - Google Patents

Abstract

The utility model provides a device for measuring the horizontal displacement of the cable foundation, including a displacement traction system, a displacement conversion system and a measurement system; the utility model can effectively convert the horizontal displacement into a vertical displacement, and collect structural displacement information remotely, It greatly improves the possibility of safe measurement by surveyors; reduces the size of the measurement result error caused by the foundation rotation angle, and further improves the accuracy of the measurement result; under the condition that the technician is easy and the construction is convenient, the measurement error is controlled within 1.25‰, which strictly meets the requirements The precision of engineering structure displacement.

Description

A device for measuring the horizontal displacement of the cable foundation

Technical field:

The utility model relates to the field of building structures, in particular to a device for measuring the horizontal displacement of a cable foundation.

Background technique:

In recent years, the speed of construction of various projects has accelerated, and the number of foundation projects for large-scale lifting and rapid transportation has increased. Since the displacement state of the stressed structure involves engineering safety and directly affects the construction and personal safety of the staff, some stressed structures have to be monitored in real time to prevent engineering accidents. For example, the wind rope foundation of the ultra-high portal gantry and the cable foundation of the suspension bridge tower are subjected to large horizontal forces, and horizontal displacement may occur under the action of the horizontal force, which reduces the restraint of the wind rope on the main structure , making the gantry potentially dangerous.

At present, the measurement of the horizontal displacement of the structure foundation is mostly based on observation and calculation methods. The measurement accuracy is greatly affected by human factors and environmental factors, and the accuracy is difficult to meet the requirements.

Utility model content:

The purpose of the utility model is to solve the above problems, and propose an accurate and stable device for measuring the horizontal displacement of the cable foundation in real time.

The technical solution adopted by the utility model is: a device for measuring the horizontal displacement of the cable foundation, including a displacement traction system, a displacement conversion system and a measurement system; the displacement traction system includes a base, a traction column, a column foot support and a traction line, and The system includes a weight, a measuring pedestal and a base. The measuring system includes a displacement meter, an inclinometer and a magnetic table; On the pedestal, the top of the pedestal frame is equipped with a fixed pulley, and the middle part is equipped with a fixed bucket. One end of the traction line is connected to the top of the traction column, and the other end is connected to the weight through the fixed pulley. There is a displacement gauge at the bottom of the weight. Magnetic table Clamped on the displacement gauge and placed on the bottom of the measuring stand.

Further, the inclinometer is arranged next to the traction column.

Furthermore, an information collection system is also provided in the device for measuring the horizontal displacement of the cable base, and the information collection system includes strain gauges, data collection lines and a computer.

The beneficial effects produced by the utility model are: the utility model can effectively convert the horizontal displacement into a vertical displacement, collect structural displacement information at a long distance, and greatly improve the possibility of safe measurement by surveyors; considering the foundation rotation angle displacement compensation, The size of the measurement result error caused by the foundation rotation angle is reduced, and the measurement result is further accurate; under the condition that the technicians are easy and the construction is convenient, the measurement error is controlled within 1.25‰, which strictly meets the accuracy of the displacement of the engineering structure.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of measuring pedestal;

Fig. 3 is a side view of the measuring stand.

Detailed ways:

This utility model is described further below in conjunction with accompanying drawing.

As shown in Figure 1, the displacement traction system of the utility model device is connected with the foundation 12, and the base 11 is made of steel plates, and is connected with the foundation 12 with expansion screws; the traction column 8 is made of steel pipe concrete, and the nominal diameter of the steel pipe is about 50mm. If the traction column is too long, the nominal diameter of the steel pipe should be appropriately increased. The traction column 8 is welded to the base 11 and the column base is welded with Φ25 steel bars to support the column 10. Three triangular braces are formed at the bottom of the traction column 8. Plain concrete is poured into the steel pipe to ensure the rigidity of the traction column 8 and prevent the traction column 8 from collapsing due to vibration caused by the external environment. A dynamic error occurs. The hole on the top of the traction column 8 is used to thread the traction line 7, and clamp the traction line 7 with a steel strand clamp to prevent the traction line 7 from slipping and causing measurement errors.

The displacement traction system converts horizontal displacement into vertical displacement through displacement conversion system. As shown in Figure 2 and Figure 3, the displacement conversion system consists of a weight 3, a measuring platform 5 and a base 6. The traction line 7 walks around the fixed pulley 4 on the measuring pedestal, penetrates the weight ring, and tightens the traction line 7 with a clamp. The pedestal frame 13 adopts a stainless steel frame, which is fixed on the base 6 with expansion screws 16, and the bottom of the pedestal frame 13 is provided with a diagonal brace 14. Each bar of the steel frame adopts stainless steel square steel pipe, and the side length of the square steel pipe is 30mm to 40mm; The fixed barrel 15 is used to guide the weight 3 to go up and down, standardize the lifting behavior of the weight 3, and prevent the weight 3 from shaking left and right. The bottom of the measuring base 5 is welded with a layer of steel plate, which is convenient for the magnetic table base 1 to be adsorbed and fixed. An expansion screw hole is respectively reserved at the four corners of the bottom of the measuring pedestal 5 for fixing the pedestal to the base with expansion screws, so as to prevent the measuring pedestal 5 from moving or overturning due to the horizontal pulling force of the traction line 7 . The base 6 is made of plain concrete and has a flat surface, which can easily fix the measuring base 5 and keep the measuring base 5 level.

The measuring system is installed on the measuring pedestal 5, and the magnetic table 1 clamps the displacement gauge 2 and is adsorbed on the measuring pedestal 5. The thimble of the displacement meter 2 withstands the weight 3, and the length of the thimble can be determined according to the basic displacement direction judged in advance. As shown in Figure 1, if the foundation 12 moves to the left, it is only necessary to let the weight 3 just press the thimble. It is recommended that the weight 3 press the thimble and move down a little to prevent errors caused by the weight 3 falling out of the air; if Foundation 12 moves to the right, then need allow heavy hammer 3 to press thimble to the end, need not complete to the end, to prevent from producing error because of traction line 7 slack. Since a slight inclination of the foundation 12 will cause a large horizontal displacement at the top of the traction column 8, the inclinometer 9 is used to correct the horizontal displacement of the foundation 12. Grind and flatten a small area next to the traction column 8, stick the base of the inclinometer 9 on it, put the inclinometer 9 into the base 11 and fix it.

The information acquisition system includes data acquisition lines, strain acquisition instruments and computers. The displacement meter 2 and the inclinometer 9 are connected to the strain acquisition instrument through the data acquisition line, and the strain acquisition instrument is connected to the computer through the usb serial port line, and the strain acquisition instrument is controlled by the computer to collect and store data.

Claims (3)

1. A device for measuring the horizontal displacement of the cable foundation, characterized in that: it comprises a displacement traction system, a displacement conversion system and a measurement system; the displacement traction system comprises a base, a traction column, a column foot support and a traction line, and the displacement conversion system comprises a weight Hammer, measuring pedestal and base, measuring system includes displacement meter, inclinometer and magnetic table base; Described measuring pedestal is fixed on the base, and measuring pedestal is made up of pedestal frame and brace, and pedestal frame is arranged on the pedestal, There is a fixed pulley on the top of the pedestal frame, and a fixed barrel in the middle. One end of the traction line is connected to the top of the traction column, and the other end is connected to the weight through the fixed pulley. There is a displacement gauge at the bottom of the weight. The magnetic table is clamped on on the displacement gauge and place it on the bottom of the measuring pedestal. 2. A device for measuring the horizontal displacement of the cable foundation according to claim 1, characterized in that: said inclinometer is arranged next to the traction column. 3. The device for measuring the horizontal displacement of the cable base according to claim 1, characterized in that: an information acquisition system is also provided in the horizontal displacement device for measuring the cable base, and the information acquisition system includes a strain gauge, Data acquisition line and computer.