Intelligent pile foundation dynamic tester

Abstract

The utility model discloses an intelligent pile foundation dynamic testing instrument which comprises an adjustable supporting frame, a pile foundation to be tested is arranged in the adjustable supporting frame, an impact hammer is installed on the adjustable supporting frame, and the impact hammer is arranged on the top of the pile foundation to be tested. A plurality of sensors used for detecting reflected waves of the to-be-detected pile foundation are arranged on the side wall of the to-be-detected pile foundation, a control unit, a displayer and an alarm are arranged on the adjustable supporting frame, and the displayer, the alarm, the sensors and the impact hammer are all electrically connected with the control unit; a plurality of preset simulation waveforms are arranged in the control unit, the control unit receives the waveforms detected by the plurality of sensors, compares the waveforms with the preset simulation waveforms, and outputs and displays the waveforms through the display and the alarm. The dynamic measuring instrument can be suitable for measuring pile foundations of various sizes, has good universality and high measuring precision, avoids measuring errors caused by human factors, is clear in data analysis, facilitates judgment of operators, and is high in measuring efficiency and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation detection equipment, in particular to an intelligent pile foundation dynamic measuring instrument. Background Art

[0002] Pile body quality integrity detection is an important part of building pile foundation detection. The usual pile body quality integrity detection adopts the low-strain detection method, using one channel, a single probe, and a method of collecting a signal curve with one hammer. When multiple curves need to be collected on the same foundation pile, or signal curves at different parts need to be compared, multiple hammering and multiple collections are required. However, since the hammering is artificial, it often causes inconsistency in the source, which directly leads to artificial deviation in the comparison of signal curves. Coupled with the system error of the instrument and equipment, it is more difficult to compare and judge the quality of the pile body. The invention patent with application number 201811056198.X discloses an intelligent pile foundation dynamic measuring instrument, including: a shell and a detection body, the detection body is arranged in the shell; a sensor and a data transmission line, the sensor is used to be arranged at the pile foundation detection point, and is connected to the detection body through the data transmission line communication; a locking plate, a locking threaded rod and a locking nut; a striking hammer, the striking hammer includes a hammer handle, a connecting rod, a sleeve, and a torque spring, the sleeve is sleeved on the locking plate, one end of the connecting rod is connected to the sleeve, one end of the hammer handle is hinged to the other end of the connecting rod, the hammer head of the hammer handle can be set on the top of the pile foundation, one end of the torque spring is connected to the connecting rod and the other end is connected to the hammer handle, it has the advantages of more uniform knocking force and accurate control of the knocking position, but the locking plate used may cause pile necking phenomenon, thereby forming a false defect column waveform, forming a necking at the bottom of the casing, this type of steel casing will form a more obvious defect reflection on the detection curve, and the waveform displayed on the instrument requires professionals to understand, which increases the requirements for the professional ability of the detection personnel and increases the labor cost. Utility Model Content

[0003] The utility model aims to provide an intelligent pile foundation dynamic measuring instrument, which can be used for measuring pile foundations of various sizes, has good versatility, high measurement accuracy, avoids measurement errors caused by human factors, has clear data analysis, is easy for operators to judge, has high measurement efficiency and strong practicality.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An intelligent pile foundation dynamic measuring instrument comprises an adjustable support frame, in which the pile foundation to be measured is arranged, and an impact hammer is installed on the adjustable support frame, and the impact hammer is arranged on the top of the pile foundation to be measured; a plurality of sensors for detecting reflected waves of the pile foundation to be measured are arranged on the side walls of the pile foundation to be measured, and a control unit, a display and an alarm are arranged on the adjustable support frame, and the display, the alarm, the plurality of sensors and the impact hammer are all electrically connected to the control unit; a plurality of preset analog waveforms are arranged in the control unit, and the control unit receives waveforms detected by the plurality of sensors, compares them with the preset analog waveforms, and outputs them through the display and the alarm.

[0006] Preferably, the adjustable support frame includes a support base, a plurality of vertical support rods detachably mounted on the support base, a support top seat detachably mounted on the tops of the plurality of vertical support rods, and a cross slide mounted on the support top seat.

[0007] Preferably, reinforcing rods are provided on the plurality of vertical support rods.

[0008] Preferably, a mounting plane is provided on the surface of the pile foundation to be tested, and the sensor is bonded to the mounting plane by butter.

[0009] Preferably, the display is used to display waveforms detected by different sensors.

[0010] Preferably, when the waveform detected by the sensor exceeds a preset analog waveform, the alarm emits a warning sound.

[0011] In the utility model, the dynamic measuring instrument as a whole is not in contact with the pile foundation to be measured, so as to avoid the phenomenon of false measurement defects caused by external forces and improve the overall measurement accuracy. The impact hammer provided can apply shock waves of different magnitudes to the pile foundation to be measured as needed, and has good versatility. The adjustable support frame provided can be adjusted according to the size of the pile foundation to be measured, and has good universal effect. The preset analog waveform pre-set in the control unit can serve as a reference for the measured waveform, which is convenient for the comparative analysis of the measurement personnel. The alarm provided can automatically issue an error alarm according to the result of the comparative analysis of the control unit, which can remind the measurement personnel to make targeted observations and improve the efficiency of data analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] In the figure: 1. adjustable support frame; 2. pile foundation to be tested; 3. impact hammer; 4. sensor; 5. control unit; 6. display; 7. alarm; 10. support base; 11. vertical support rod; 12. support top seat; 13. cross slide; 14. reinforcement rod. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] like Figure 1 The intelligent pile foundation dynamic measuring instrument shown includes an adjustable support frame 1, which includes a support base 10, a plurality of vertical support rods 11 detachably mounted on the support base 10 by bolts, a support top seat 12 detachably mounted on the top of the plurality of vertical support rods 11 by bolts, and a cross slide 13 fixedly mounted on the support top seat 12 by bolts. During the measurement construction, the length and width of the adjustable support frame 1 are adjusted according to the size of the pile foundation 2 to be measured, the support base 10 is arranged around the bottom circumference of the pile foundation 2 to be measured, and then the plurality of vertical support rods 11 are plugged into the support base 10, and finally the support top seat 12 is connected to the top of the vertical support rod 11. Specifically, a total of four vertical support rods 11 are arranged between the support top seat 12 and the support base 10. Reinforcement rods 14 are fixedly arranged on the circumference of the plurality of vertical support rods 11 by fasteners to improve the stability of the adjustable support frame 1. Vertical support rods 11 of different heights are selected according to the height of the pile foundation 2 to be tested, so that the cross slide 13 is located above the top of the pile foundation 2 to be tested.

[0016] The pile foundation 2 to be tested is arranged inside the adjustable support frame 1, and an impact hammer 3 is fixedly installed on the adjustable support frame 1 through fasteners. The impact hammer 3 is arranged above the top of the pile foundation 2 to be tested, and can apply shock waves of different magnitudes to the top of the pile foundation 2 to be tested according to the control of the control unit 5. Specifically, the impact hammer 3 is fixedly installed on the cross slide 13 through fasteners, and the position of the impact hammer 3 relative to the pile foundation 2 to be tested is adjusted by the cross slide 13, and the top of the pile foundation 2 to be tested can be struck at different positions. The impact hammer 3 uses a pneumatic inflatable hammer.

[0017] A plurality of sensors 4 for detecting reflected waves of the pile foundation to be tested are arranged on the side wall of the pile foundation to be tested 2. The sensor 4 is a lightweight sensor, and specifically, a sonic wave probe of model TCT40-16R / T can be selected. Specifically, a plurality of mounting planes are arranged vertically on the side wall surface of the pile foundation to be tested 2. The sensor 4 is bonded to the mounting plane by butter, which facilitates the disassembly and assembly of the sensor 4 while ensuring the installation stability of the sensor 4. Of course, the sensor 4 can also be mounted on the mounting plane by 502 glue or other methods.

[0018] A control unit 5, a display 6 and an alarm 7 are provided on the adjustable support frame 1 through a connecting plate, and the display 6, the alarm 7, the multiple sensors 4 and the impact hammer 3 are all electrically connected to the control unit 5 through cables. In this embodiment, the control unit 5 is a single chip microcomputer.

[0019] A plurality of preset simulation waveforms are arranged in the control unit 5. The plurality of preset simulation waveforms are based on the process, diameter, length, time, strength and other data of the pile foundation 2 to be measured, and the pile foundation BIM model is constructed. The simulation is performed according to the installation positions of different sensors 4, and the corresponding simulation waveforms are output. The control unit 5 displays different preset simulation waveforms on the display 6 at the same time. During measurement, the sound waves detected by different sensors 4 are respectively displayed on the simulation waveforms, and are distinguished by different colors. The control unit 5 receives the waveforms detected by the plurality of sensors 4 and compares them with the preset simulation waveforms, and outputs and displays them through the display 6 and the alarm 7. The display 6 is used to display the waveforms detected by different sensors 4 at the same time. When the waveform detected by the sensor 4 exceeds the preset simulation waveform, the alarm 7 emits a warning sound, which can also be intuitively seen from the waveform displayed on the display 6. The professional knowledge and ability of the measurement personnel are reduced, the phenomenon of traditional third-party detection is avoided, and the labor cost is reduced.

[0020] The above embodiments are only some descriptions of the concept and implementation of the utility model, and are not intended to limit the concept and implementation of the utility model. Under the concept of the utility model, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. An intelligent pile foundation dynamic measuring instrument, characterized in that: The invention comprises an adjustable support frame, in which the pile foundation to be tested is arranged, and an impact hammer is installed on the adjustable support frame, and the impact hammer is arranged on the top of the pile foundation to be tested; a plurality of sensors for detecting reflected waves of the pile foundation to be tested are arranged on the side walls of the pile foundation to be tested, and a control unit, a display and an alarm are arranged on the adjustable support frame, and the display, the alarm, the plurality of sensors and the impact hammer are all electrically connected to the control unit; a plurality of preset analog waveforms are arranged in the control unit, and the control unit receives waveforms detected by the plurality of sensors, compares them with the preset analog waveforms, and outputs and displays them through the display and the alarm.

2. The intelligent pile foundation dynamic measuring instrument according to claim 1, characterized in that: The adjustable support frame comprises a support base, a plurality of vertical support rods detachably mounted on the support base, a support top seat detachably mounted on the tops of the plurality of vertical support rods, and a cross slide mounted on the support top seat.

3. The intelligent pile foundation dynamic measuring instrument according to claim 2, characterized in that: Reinforcement rods are arranged on the plurality of vertical support rods.

4. The intelligent pile foundation dynamic measuring instrument according to claim 1 or 3, characterized in that: A mounting plane is arranged on the surface of the pile foundation to be tested, and the sensor is bonded to the mounting plane by butter.

5. The intelligent pile foundation dynamic measuring instrument according to claim 1, characterized in that: The display is used to display the waveforms detected by the different sensors.

6. The intelligent pile foundation dynamic measuring instrument according to claim 5, characterized in that: When the waveform detected by the sensor exceeds the preset analog waveform, the alarm emits a warning sound.

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