CN113026708B

CN113026708B - Static sounding probe

Info

Publication number: CN113026708B
Application number: CN202110318563.5A
Authority: CN
Inventors: 沙鹏; 白浩东; 黄曼; 吴早生; 肖景平; 林东明; 胡春东
Original assignee: University of Shaoxing
Current assignee: University of Shaoxing
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2022-05-27
Anticipated expiration: 2041-03-25
Also published as: CN113026708A

Abstract

The invention discloses a novel static sounding probe which comprises a probe body, a horizontal disc and a fixed shaft. The probe body comprises a connector, a side wall friction cylinder and a conical tip which are sequentially connected from top to bottom, a laser sensor, an inclination angle sensor, a side resistance sensor and an end resistance sensor are sequentially arranged in the probe body from top to bottom, the laser sensor is fixed at one end, close to the connector, of the side wall friction cylinder, a groove is formed in the central position of the upper end face of the conical tip and used for accommodating the end resistance sensor; the inclination angle sensor is fixed on the horizontal disc; the upper end of the fixed shaft abuts against the horizontal disc, the lower end of the fixed shaft abuts against the conical tip and the end resistance sensor at the same time, the inner wall of the side wall friction cylinder is provided with the supporting pad, and the side resistance sensor is arranged in a gap between the fixed shaft and the side wall friction cylinder. Compared with the prior art, the invention can monitor the inclination degree and the depth of the probe penetrating into the soil body in real time and has the characteristic of high safety.

Description

Static sounding probe

Technical Field

The invention relates to the technical field of static sounding, in particular to a static sounding probe.

Background

Static sounding is an important means for in-situ soil exploration in the field of geotechnical engineering, and is to press a feeler lever with a feeler into a test soil layer by using a pressure device, and measure and evaluate physical characteristics of the in-situ soil body, such as deformation modulus of the soil, allowable bearing capacity of the soil and the like, through a sensor in the feeler. In the prior art, the depth of the probe penetrating into the soil body needs to be manually controlled during static sounding, and the equipment can not be ensured to accurately reach the required depth, so that the authenticity and the accuracy of data are influenced. In the static sounding process, the probe is easy to incline along with the increase of the static sounding depth, so that the deviation of the measured data is large, the detection efficiency is low, and the probe rod are easy to break, so that the equipment is damaged. Therefore, how to provide a static sounding probe capable of monitoring the inclination degree of the probe and the depth of the probe penetrating into the soil in real time is a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

The invention aims to provide a static sounding probe, which aims to solve the technical problem that the existing probe cannot monitor the inclination angle and the depth of penetration into a soil body in real time.

In order to achieve the purpose, the invention provides the following scheme:

the invention discloses a static sounding probe, which comprises:

the probe comprises a probe body, wherein the probe body comprises a connector, a side wall friction cylinder and a conical tip which are sequentially connected from top to bottom, a laser sensor, an inclination angle sensor, a side resistance sensor and an end resistance sensor are sequentially arranged in the probe body from top to bottom, the laser sensor is fixed at one end, close to the connector, of the side wall friction cylinder, the emitting end of the laser sensor faces upwards, the connector is provided with a laser detection hole, the laser detection hole corresponds to the emitting end of the laser sensor, a groove is formed in the central position of the upper end face of the conical tip and used for accommodating the end resistance sensor;

the horizontal disc is fixedly connected with the inner wall of the side wall friction cylinder, and the inclination angle sensor is fixed on the horizontal disc;

the fixed axle, the fixed axle the connector the lateral wall friction section of thick bamboo with the awl tip is coaxial, the diameter of fixed axle is less than the internal diameter of a lateral wall friction section of thick bamboo and be greater than the diameter that the end hinders the sensor, the upper end of fixed axle with the horizontal plate offsets, the lower extreme of fixed axle simultaneously with the awl tip with the end hinders the sensor and offsets, install the supporting pad on the inner wall of a lateral wall friction section of thick bamboo, the side hinder the sensor install in the fixed axle with in the clearance between the lateral wall friction section of thick bamboo, the side hinder the one end of sensor with the fixed axle offsets, the side hinder the other end of sensor with the supporting pad offsets.

Preferably, still include the mount, the mount is fixed in the lateral wall friction section of thick bamboo is close to the one end of connector, laser sensor with mount fixed connection.

Preferably, the connector and the side wall friction cylinder are sealed through waterproof materials.

Preferably, the connector is provided with a first wire hole for the laser sensor, the inclination angle sensor, the side resistance sensor and the end resistance sensor to pass through, the horizontal disc is provided with a second wire hole for the side resistance sensor and the end resistance sensor to pass through, and the fixed shaft is provided with a third wire hole for the end resistance sensor to pass through.

Preferably, the fixed shaft is provided with an axial through hole, the upper end surface of the fixed shaft is provided with a radial groove, the axial through hole is communicated with the radial groove, and the third line hole is formed by the axial through hole and the radial groove.

Preferably, the end resistance sensor is a resistance strain type pressure sensor, the end resistance sensor comprises a shell and strain gauges, and the two strain gauges are fixed at two ends of the bottom of the shell respectively.

Preferably, the side resistance sensors are strain gauges, and the side resistance sensors are two and symmetrical with respect to the axis of the side wall friction cylinder.

Preferably, the inclination angle sensor is used for measuring the inclination angle of the static sounding probe in real time, and a ground receiving device electrically connected with the inclination angle sensor can display the inclination angle in real time and give an alarm when the inclination angle exceeds 10 degrees.

Preferably, the laser sensor is used for measuring the penetration depth of the static sounding probe in real time, the laser sensor emits laser every two seconds, a detachable disc serving as a laser emission target is mounted at the top end of the sounding host, and the ground receiving device electrically connected with the detachable disc can display and record the penetration depth in real time.

Compared with the prior art, the invention has the following technical effects:

the invention provides a static sounding probe which comprises a probe body, a horizontal disc and a fixed shaft, wherein the probe body comprises a connector, a side wall friction cylinder and a conical tip which are sequentially connected from top to bottom, and a laser sensor, an inclination angle sensor, a side resistance sensor and an end resistance sensor are sequentially arranged in the probe body from top to bottom. The end resistance sensor converts the resistance borne by the cone tip into a data signal and transmits the data signal to the ground receiving device. The side hinders the sensor and converts the frictional force that a lateral wall friction section of thick bamboo received into data signal to convey this data signal to ground receiving arrangement, install the supporting pad on the inner wall of a lateral wall friction section of thick bamboo, the supporting pad offsets with the side hinders the sensor, guarantees the sensitivity that the side hinders sensor measurement. The inclination angle sensor can monitor the inclination degree of the probe in real time, when the inclination angle of the probe exceeds a preset value, a signal is sent out and is connected to a ground receiving device through a cable, an alarm is sent out, the probe stops working, the situation that the probe and a probe rod are too large in inclination angle to cause fracture can be effectively avoided, and the safety of the device is guaranteed. The laser sensor utilizes laser emission to touch the time difference that the target object reflects laser sensor and calculates the degree of depth, can dismantle the disc at the installation of sounding host computer top as laser emission target object, and after laser passed the disc after laser detection hole, the penetration depth of probe can be accurately surveyed, has simple structure, measurement accuracy height, convenient operation's advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a static cone penetration probe according to the present embodiment;

wherein: 1-conical tip; 2-a termination resistance sensor; 3-a support pad; 4-lateral resistance sensor; 5-side wall friction cylinder; 6-a tilt sensor; 7-horizontal disc; 8-a laser sensor; 9-a fixing frame; 10-a connector; 11-laser probing holes; 12-a first wire hole; 13-a fixed shaft; 14-a second wire hole; 15-third string hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.

As shown in fig. 1, the present embodiment provides a static cone penetration probe comprising a probe body, a horizontal disc 7 and a fixed shaft 13.

The probe body comprises a connector 10, a side wall friction cylinder 5 and a conical tip 1 which are sequentially connected from top to bottom, a laser sensor 8, an inclination angle sensor 6, a side resistance sensor 4 and an end resistance sensor 2 are sequentially arranged in the probe body from top to bottom, the laser sensor 8 is fixed at one end, close to the connector 10, of the side wall friction cylinder 5, the emitting end of the laser sensor 8 faces upwards, the connector 10 is provided with a laser detecting hole 11, the laser detecting hole 11 corresponds to the emitting end of the laser sensor 8, a groove is formed in the central position of the upper end face of the conical tip 1 and used for accommodating the end resistance sensor 2; the horizontal disc 7 is fixedly connected with the inner wall of the side wall friction cylinder 5, and the tilt angle sensor 6 is fixed on the horizontal disc 7; fixed axle 13, connector 10, lateral wall friction cylinder 5 is coaxial with awl tip 1, the diameter of fixed axle 13 is less than the internal diameter of lateral wall friction cylinder 5 and is greater than the diameter that the end hinders sensor 2, the upper end and the horizontal disc 7 of fixed axle 13 offset, the lower extreme of fixed axle 13 offsets with awl tip 1 and end simultaneously and hinder sensor 2, install supporting pad 3 on the inner wall of lateral wall friction cylinder 5, side hinders sensor 4 and installs in the clearance between fixed axle 13 and the lateral wall friction cylinder 5, the one end that the side hinders sensor 4 offsets with fixed axle 13, the other end that the side hinders sensor 4 offsets with supporting pad 3.

In this embodiment, when the static cone penetration probe penetrates into the soil, the cone tip 1 receives the resistance of the soil and transmits the resistance to the end resistance sensor 2, and the end resistance sensor 2 converts the resistance received by the cone tip 1 into a data signal and transmits the data signal to the ground receiving device. When the static sounding probe penetrates into a soil body, the side wall friction cylinder 5 rubs with the soil body, the side resistance sensor 4 converts the friction force applied to the side wall friction cylinder 5 into a data signal and transmits the data signal to the ground receiving device, the supporting pad 3 is installed on the inner wall of the side wall friction cylinder 5, the supporting pad 3 is abutted to the side resistance sensor 4, and the measuring sensitivity of the side resistance sensor 4 is guaranteed. The inclination angle sensor 6 is installed on the horizontal disc 7, the inclination angle sensor 6 is guaranteed to be perpendicular to the axis of the probe, the inclination degree of the probe can be monitored in real time, when the inclination angle of the probe exceeds a preset value, a signal is sent out and is connected to a ground receiving device through a cable, an alarm is sent out, the probe stops working, the situation that the probe and a probe rod are too large in inclination angle and break is caused can be effectively avoided, and the safety of the device is guaranteed. Laser sensor 8 utilizes laser emission to touch the time difference that target object reflects laser sensor 8 and calculates the degree of depth, can dismantle the disc as laser emission target object in the installation of sounding host computer top, and after laser passed laser detection hole 11 back and touch the disc, the penetration depth that can accurate survey probe, ground receiving arrangement rather than the electricity is connected can show in real time and take notes the penetration depth, has simple structure, measurement accuracy is high, convenient operation's advantage.

The laser sensor 8 and the side wall friction cylinder 5 can be fixed in various ways, and the skilled person can select the fixing mode according to the needs. The embodiment further comprises a fixing frame 9, the fixing frame 9 is fixed at one end, close to the connector 10, of the side wall friction cylinder 5, and the laser sensor 8 is fixedly connected with the fixing frame 9. Further, the laser sensor 8 emits laser light every two seconds.

In order to improve the sealing performance and the waterproof performance of the connector 10 and the side wall friction cylinder 5, so as to ensure the accuracy of the data measured by the probe, in the embodiment, the connector 10 and the side wall friction cylinder 5 are sealed by a waterproof material.

In this embodiment, the connector 10 is provided with a first wire hole 12 through which the cables of the laser sensor 8, the tilt angle sensor 6, the side resistance sensor 4 and the end resistance sensor 2 pass, the horizontal disc 7 is provided with a second wire hole 14 through which the cables of the side resistance sensor 4 and the end resistance sensor 2 pass, and the fixing shaft 13 is provided with a third wire hole 15 through which the cable of the end resistance sensor 2 passes. Further, the fixed shaft 13 is provided with an axial through hole, the upper end surface of the fixed shaft 13 is provided with a radial groove, the axial through hole is communicated with the radial groove, and the third line hole 15 is composed of the axial through hole and the radial groove. Can guarantee that the cable of each sensor arranges regularly in the probe, avoid arranging the condition that probably appears the signal emergence mutual interference between each sensor when being mixed and disorderly when the cable to make things convenient for the installation and the dismantlement of sensor.

The form of the endstop sensor 2 is numerous and can be selected by those skilled in the art as desired. In this embodiment, the end resistance sensor 2 is a resistance strain type pressure sensor, the end resistance sensor 2 includes a housing and strain gauges, and the two strain gauges are respectively fixed at two ends of the bottom of the housing. Further, the side resistive sensor 4 is a strain gauge, and the side resistive sensor 4 is two and symmetrical with respect to the axis of the sidewall friction cylinder 5.

In this embodiment, inclination sensor 6 is high accuracy digital dynamic inclination sensor 6, adopt MEMS accelerometer and gyroscope of high quality and strong reliability, and guarantee measurement accuracy through the algorithm, can be containing the noise, vibrate, accurate output angle in the environment of motion, the error that the interference produced has been eliminated greatly, output data is direct to be connected to receiving arrangement such as ground computer through the cable, the computer can show inclination in real time, and can set up the alarm value, when the probe inclination exceeds 10, data acquisition then can stop immediately, and send out the warning sound, can effectively guarantee the security of device.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. A static cone penetration probe, comprising: the probe comprises a probe body, wherein the probe body comprises a connector, a side wall friction cylinder and a conical tip which are sequentially connected from top to bottom, a laser sensor, an inclination angle sensor, a side resistance sensor and an end resistance sensor are sequentially arranged in the probe body from top to bottom, the laser sensor is fixed at one end, close to the connector, of the side wall friction cylinder, the emitting end of the laser sensor faces upwards, the connector is provided with a laser detection hole, the laser detection hole corresponds to the emitting end of the laser sensor, a groove is formed in the central position of the upper end face of the conical tip and used for accommodating the end resistance sensor;

the fixed shaft, the connector, the side wall friction cylinder and the conical tip are coaxial, the diameter of the fixed shaft is smaller than the inner diameter of the side wall friction cylinder and larger than the diameter of the end resistance sensor, the upper end of the fixed shaft abuts against the horizontal disc, the lower end of the fixed shaft abuts against the conical tip and the end resistance sensor simultaneously, a supporting pad is mounted on the inner wall of the side wall friction cylinder, the side resistance sensor is mounted in a gap between the fixed shaft and the side wall friction cylinder, one end of the side resistance sensor abuts against the fixed shaft, and the other end of the side resistance sensor abuts against the supporting pad;

the laser sensor is used for measuring the penetration depth of the static sounding probe in real time, the laser sensor emits laser every two seconds, a detachable disc serving as a laser emission target object is installed at the top end of the sounding host, and the ground receiving device electrically connected with the laser sensor can display and record the penetration depth in real time.

2. A static cone penetration probe according to claim 1 further comprising a fixing frame, wherein the fixing frame is fixed at one end of the side wall friction cylinder close to the connector, and the laser sensor is fixedly connected with the fixing frame.

3. A static sounding probe according to claim 1, wherein the connector and the side wall friction cylinder are sealed by a water-resistant material.

4. A static sounding probe according to claim 1, wherein the connecting head is provided with a first wire hole for passing the cables of the laser sensor, the tilt sensor, the side resistance sensor and the end resistance sensor, the horizontal plate is provided with a second wire hole for passing the cables of the side resistance sensor and the end resistance sensor, and the fixing shaft is provided with a third wire hole for passing the cable of the end resistance sensor.

5. A static sounding probe according to claim 4, wherein the fixed shaft is provided with an axial through hole, the upper end face of the fixed shaft is provided with a radial groove, the axial through hole is communicated with the radial groove, and the third wire hole is formed by the axial through hole and the radial groove.

6. A static sounding probe according to claim 1, wherein the end resistance sensor is a resistance strain gauge pressure sensor, and the end resistance sensor comprises a housing and strain gauges, and the two strain gauges are respectively fixed at two ends of the bottom of the housing.

7. A static sounding probe according to claim 1, wherein the side resistive sensors are strain gauges, the side resistive sensors being two and symmetrical about the axis of the sidewall friction cylinder.

8. A static sounding probe according to claim 1, wherein the tilt sensor is adapted to measure the tilt of the static sounding probe in real time, and a ground-based receiving device electrically connected to the tilt sensor is adapted to display the tilt in real time and to issue an alarm when the tilt exceeds 10 °.