CN103061363B - Device for monitoring soil plug lifting height of prestressed pipe pile in hydrostatic process - Google Patents

Abstract

The invention discloses a device for monitoring the rising height of a soil plug during the static pressure process of a prestressed pipe pile, which includes a measuring instrument, a fixed disc, a multi-turn potentiometer, a synchronous wheel, a synchronous belt, a first counterweight and a second counterweight, The fixed disc is provided with a fixed foot, the multi-turn potentiometer is fixed on the fixed disc, the synchronous wheel is inlaid on the multi-turn potentiometer, and the synchronous belt is wound on the synchronous wheel Above, the first counterweight and the second counterweight are respectively arranged at both ends of the synchronous belt, the weight of the first counterweight is greater than the weight of the second counterweight, and the measuring instrument is connected to the multi-turn potential device. The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile of the present invention can accurately monitor the change process of the height of the soil plug during the static pressure process of the prestressed pipe pile in real time, and has a simple structure, ingenious design, low manufacturing cost and reliable data high sex.

Description

A device for monitoring the rising height of soil plugs during static pressure of prestressed pipe piles

technical field

The invention relates to a device for monitoring the rising height of a soil plug during the static pressure process of a prestressed pipe pile.

Background technique

In the prior art, there is no device capable of monitoring the rising height of the soil plug in the pile cavity during the pile driving static pressure process. The general practice in engineering is to measure the final rising height of the soil plug with a tape measure after the piling is completed. The real-time monitoring of the rising height of the soil plug can clarify the whole process of the rising of the soil plug during the piling process, the growth of the soil plug height when the pipe pile is driven into different types of soil layers, and the composition of the bearing capacity of the pipe pile. , to verify and revise the design of the pile bearing capacity.

Therefore, a device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile is needed to solve the above problems.

Contents of the invention

Purpose of the invention: The present invention provides a simple and convenient device for monitoring the rising height of the soil plug during the static pressure process of prestressed pipe piles, aiming at the defects of the prior art monitoring device for the rising height of the soil plug during the static pressure process of the prestressed pipe pile.

Technical solution: In order to solve the above technical problems, the device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile of the present invention adopts the following technical solution:

A device for monitoring the rising height of the soil plug during the static pressure process of prestressed pipe piles, including a measuring instrument, a fixed disc, a multi-turn potentiometer, a synchronous wheel, a synchronous belt, a first counterweight and a second counterweight, the fixed disc The disk is provided with a fixed foot, the multi-turn potentiometer is fixed on the fixed disk, the synchronous wheel is embedded on the multi-turn potentiometer, the synchronous belt is wound on the synchronous wheel, the The first counterweight and the second counterweight are respectively arranged at both ends of the synchronous belt, the weight of the first counterweight is greater than the weight of the second counterweight, and the measuring instrument is connected to the multi-turn potentiometer.

Preferably, three or four fixed feet are arranged on the fixed disk, the fixed feet are evenly arranged along the circumference of the fixed disk, and the fixed feet are arranged vertically to the fixed disk. The fixing foot is used for fixing the disc and the end of the pipe pile, and the fixing effect is better.

Preferably, the fixing feet are cylindrical.

Preferably, the fixed foot has a length of 5±0.1cm and a diameter of 8±1mm.

Preferably, the diameter of the fixed disc is equal to the outer diameter of the prestressed pipe pile. The outer diameter of the fixed disk is the same as that of the prestressed pipe pile, so that the fixed disk can be conveniently fixed on the end of the pipe pile.

Preferably, a slot is provided on the synchronous wheel, and the synchronous belt is embedded in the slot. The timing belt is not easy to slip out.

Preferably, the synchronous wheel is arranged in the middle of the fixed disc. It is convenient to put the first counterweight and the second counterweight into the cavity of the pipe pile.

Invention principle: Before the construction of the pipe pile, the disc equipped with the test device is clamped on the pile head, and the timing belt and counterweight are placed in the cavity of the pipe pile. Due to the balance of self-weight, the large counterweight at one end of the timing belt falls to the ground. Small counterweights hang in the air. With the rise of the soil plug in the pipe pile cavity, the large counterweight rises and the small counterweight falls relative to the pipe pile, the multi-turn potentiometer rotates synchronously, and the linear motion of the counterweight is converted into a synchronous wheel and a multi-turn potentiometer The rotational movement of the pipe pile, the height change of the soil plug in the pipe pile is converted into the change of the resistance value of the multi-turn potentiometer in real time. The voltage signal is transmitted to the measuring instrument through the wire, and the relationship between the height change of the soil plug and the output voltage of the multi-turn potentiometer is established according to the calibration coefficient, so as to achieve the purpose of real-time monitoring of the height of the soil plug. .

Beneficial effects: The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile of the present invention can accurately monitor the change process of the height of the soil plug during the static pressure process of the prestressed pipe pile in real time. The principle of the invention is simple and ingenious, the production cost is low, and the data reliability is high. The engineering application effect is good, and it has a wide prospect of popularization and application.

Description of drawings

Fig. 1 is the perspective view of the device of the monitoring prestressed pipe pile static pressure process soil plug rising height of the present invention;

Fig. 2 is the front view of the device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile of the present invention;

Fig. 3 is a top view of the device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile according to the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

Please refer to Fig. 1, Fig. 2 and shown in Fig. 3, the device for monitoring the rising height of the soil plug in the static pressure process of the prestressed pipe pile of the present invention includes a measuring instrument, a fixed disc 1, a multi-turn potentiometer 2, a synchronous wheel 3, Timing belt 4, first counterweight 5 and second counterweight 6. Wherein, the diameter of the fixed disk 1 is equal to the diameter of the prestressed pipe pile, and three fixed feet 11 are arranged on the fixed disk 1 . Wherein, the number of fixed feet 11 can also be four. The fixed foot 11 is cylindrical. The fixed foot 11 has a length of 5±0.1cm and a diameter of 8±1mm. The fixed feet 11 are evenly arranged along the circumference of the fixed disk 1, and the fixed feet 11 are arranged vertically to the fixed disk 1 for fixing the disk 1 and the end of the pipe pile. The multi-turn potentiometer 2 is fixed on the fixed disk 1, the synchronous wheel 3 is embedded on the multi-turn potentiometer 2, and the synchronous wheel 3 and the multi-turn potentiometer 2 keep rotating synchronously. The synchronous belt 4 is wound on the synchronous wheel 3, wherein the synchronous wheel 3 is provided with a card slot, the synchronous belt 4 is embedded in the card slot, the synchronous belt 4 is embedded in the card slot of the synchronous wheel 3, and is at the same speed as the synchronous wheel 3 rotate. The weight of the first counterweight 5 is greater than the weight of the second counterweight 6 , and the first counterweight 5 and the second counterweight 6 are respectively arranged at both ends of the synchronous belt 4 . The measuring instrument is connected with the multi-turn potentiometer 2.

Before the construction of the pipe pile, the fixed disc 1 equipped with the test device is stuck on the pile head, and the timing belt 4, the first counterweight 5 and the second counterweight 6 are put into the cavity of the pipe pile. Due to the balance of self-weight, the timing belt 4 The large counterweight at one end falls to the ground, and the small counterweight hangs in the air. With the rise of the soil plug in the pipe pile cavity, the large counterweight of the pipe pile rises and the small counterweight falls, the multi-turn potentiometer 2 rotates synchronously, and the linear motion of the counterweight is converted into synchronous wheel 3 and multi-turn The rotary motion of the potentiometer 2 and the height change of the soil plug in the pipe pile are converted into the change of the resistance value of the multi-turn potentiometer 2 in real time. The voltage signal is transmitted to the measuring instrument through the wire, and the relationship between the change of the soil plug height and the output voltage of the multi-turn potentiometer 2 is established according to the calibration coefficient, so as to achieve the purpose of real-time monitoring of the soil plug height.

The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile of the present invention can accurately monitor the change process of the soil plug height during the static pressure process of the prestressed pipe pile in real time, and the rise of the soil plug in the pile during the static pressure process of the prestressed pipe pile Height is a parameter needed to calculate the bearing capacity of pipe piles. The principle of the invention is simple and ingenious, the production cost is low, and the data reliability is high. The engineering application effect is good, and it has a wide prospect of popularization and application.

Claims (7)

1. A device for monitoring the rising height of the soil plug during the static pressure process of prestressed pipe piles is characterized in that it includes a measuring instrument, a fixed disc, a multi-turn potentiometer, a synchronous wheel, a synchronous belt, a first counterweight and a second counterweight Heavy, the fixed disc is provided with a fixed foot, the multi-turn potentiometer is fixed on the fixed disc, the synchronous wheel is inlaid on the multi-turn potentiometer, and the synchronous belt is wound on the On the synchronous wheel, the first counterweight and the second counterweight are respectively arranged at both ends of the synchronous belt, the weight of the first counterweight is greater than the weight of the second counterweight, and the measuring instrument is connected to the multiple ring potentiometer. 2. The device for monitoring the rising height of the soil plug in the process of static pressure of prestressed pipe piles as claimed in claim 1, wherein three or four fixed feet are arranged on the fixed disk, and the fixed feet are arranged along the The circumference of the fixed disk is evenly arranged, and the fixed feet are arranged vertically to the fixed disk. 3. The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile as claimed in claim 2, wherein the fixed foot is cylindrical. 4. The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile as claimed in claim 1, wherein the length of the fixed foot is 5 ± 0.1 cm, and the diameter is 8 ± 1 mm. 5. The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile according to claim 1, wherein the diameter of the fixed disc is equal to the outer diameter of the prestressed pipe pile. 6. The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile according to claim 1, characterized in that, the synchronous wheel is provided with a slot, and the synchronous belt is embedded in the slot. 7. The device for monitoring the rising height of the soil plug during the static pressure process of the prestressed pipe pile according to claim 1, wherein the synchronous wheel is arranged in the middle of the fixed disk.