WO2023078334A1

WO2023078334A1 - Intelligent core drilling monitoring system having early-warning function and monitoring method

Info

Publication number: WO2023078334A1
Application number: PCT/CN2022/129480
Authority: WO
Inventors: 王小威; 陈铖; 刘强; 熊睿佳; 洪丽凡
Original assignee: 深圳市房屋安全和工程质量检测鉴定中心; 深圳大学
Priority date: 2021-11-03
Filing date: 2022-11-03
Publication date: 2023-05-11
Also published as: CN114017003A

Abstract

An intelligent core drilling monitoring system having an early-warning function and a monitoring method. The monitoring system comprises a drilling rig and a monitoring assembly; the drilling rig comprises a drill rod (6), an upper crossbeam (1), a lower crossbeam (2), and vertical shafts (3); the upper ends of the vertical shafts (3) are fixedly connected to the upper crossbeam (1); the lower ends of the vertical shafts (3) penetrate through the lower crossbeam (2) and can move up and down relative to the lower crossbeam (2); the drill rod (6) penetrates through the upper crossbeam (1) and the lower crossbeam (2) and can move up and down relative to the upper crossbeam (1) and the lower crossbeam (2); the monitoring assembly comprises springs (4), pressure sensors (5), and displacement sensors (7); the springs (4) are sleeved on the vertical shafts (3) and are located between the upper crossbeam (1) and the lower crossbeam (2); the pressure sensors (5) are mounted on upper and lower ends of the springs (4); and the displacement sensors (7) are mounted on the lower crossbeam (2), and the top portions of the displacement sensors abut against the upper crossbeam (1). A real-time monitoring function for core drilling is implemented by means of compression deformation of the springs (4), defects monitored by a cast-in-place pile are subjected to early-warning analysis and determined by means of datafied languages, and accurate and reliable data support is provided for later processing of a defective pile.

Description

An intelligent drilling core monitoring system and monitoring method with early warning function

technical field

The invention relates to the field of pile foundation core drilling detection, and more specifically relates to an intelligent core drilling monitoring system and monitoring method with an early warning function.

Background technique

With the development of pile foundation core-drilling detection, the core-drilling method is widely used because of its simple method, true results, intuitive data without conversion.

However, there are significant shortcomings in the current core drilling technology: (1) The detection technology is artificial, and the drilling size of the core drill rod is mainly obtained by measuring with an artificial steel ruler, with large errors and no intelligent data real-time monitoring (2) The discovery of defective piles mainly relies on manual observation, without intelligent monitoring technology and corresponding intelligent monitoring data; (3) The supervision of the quality of drilling core inspection mainly depends on the supervisor's on-site side station And the real-time monitoring of the 360-degree camera wastes a lot of manpower and material resources, and cannot provide intelligent monitoring data.

Therefore, how to carry out real-time data monitoring of core drilling detection and how to accurately analyze and judge the defects detected by cast-in-place piles in a digital language are technical problems to be solved urgently by those skilled in the art.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and provide an intelligent drill core monitoring system and monitoring method with an early warning function.

To achieve the above object, the present invention adopts the following technical solutions:

On the one hand, an intelligent drilling core monitoring system with early warning function includes a drilling rig and monitoring components; the drilling rig includes a drill pipe, an upper beam, a lower beam and a vertical shaft; the upper end of the vertical shaft is fixedly connected to the upper beam, and the lower end of the vertical In the lower crossbeam, and can move up and down relative to the lower crossbeam, the drill pipe is passed through the upper crossbeam and the lower crossbeam, and can move up and down relative to the upper crossbeam and the lower crossbeam; the monitoring components include springs, pressure sensors and displacement sensors; springs Sleeved on the vertical shaft and located between the upper beam and the lower beam, the pressure sensor is installed on the upper and lower ends of the spring, the displacement sensor is installed on the lower beam, and its top abuts against the upper beam.

Its further technical solution is: it also includes a dynamic acquisition box and a computer; the dynamic acquisition box receives the data collected by the pressure sensor and the displacement sensor, and sends it to the computer, and the computer performs visual processing on the collected data.

Its further technical solution is: the spring adopts a linear spring whose stiffness does not change with the load.

On the other hand, a monitoring method using an intelligent drilling core monitoring system with an early warning function, the method includes:

Real-time collection of elastic force data generated when the spring displacement changes within each cycle;

Real-time collection of displacement data when spring elasticity changes in each cycle;

According to the relationship between elastic force data and displacement data and time in each cycle, it is determined whether there is a defect in the cast-in-situ pile and the position of the defect.

Its further technical scheme is: the method also includes:

Send elastic data, displacement data and time data to the computer;

The computer draws a visualization based on the elastic force data, displacement data and time data.

Its further technical solution is: according to the relationship between the elastic force data and displacement data and time in each cycle, it is determined whether there is a defect in the cast-in-situ pile and the location of the defect, specifically including:

Calculate the time spent when the spring compresses and deforms to the maximum or when the elastic force increases to the maximum in each cycle;

The time it takes to determine when the spring compresses and deforms to the maximum or when the elastic force increases to the maximum in a certain cycle is compared to the time spent when the spring compresses and deforms to the maximum or when the elastic force increases to the maximum in other cycles Whether the time is reduced;

If so, it is determined that the cast-in-situ pile has defects in the return cycle when the spring compression deformation reaches the maximum or the time spent when the elastic force increases to the maximum decreases;

The location of the defect is calculated according to the displacement of the spring in the cycle in which the defect occurs and the displacements of all cycles before the defect occurs.

Its further technical solution is to collect in real time the elastic force data generated when the spring displacement changes in each cycle through the pressure sensor.

Its further technical solution is: real-time collection of displacement data of spring elasticity changes in each cycle through displacement sensors.

Its further technical solution is: sending the elastic force data and displacement data to the computer through the dynamic acquisition box.

The beneficial effect of the present invention compared with the prior art is that the present invention adds a monitoring component on the basis of the existing drilling rig, according to the displacement change, elastic change and time of the spring in the monitoring component in each return cycle Therefore, it is possible to accurately determine in which cycle the cast-in-situ pile has defects and the location of the defect, which solves the current history that can only be observed manually without real-time monitoring, and solves the problem that can only be roughly measured through steel rulers. The history of measuring or visually estimating without accurate data, using data language and real-time monitoring technology to accurately analyze and judge the defects of cast-in-place piles, provides accurate and reliable data support for later processing.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following A preferred embodiment is specifically cited, and detailed description is as follows.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is a kind of intellectualization and the structure schematic diagram (the spring is not compressed state) of the drilling core monitoring system with early warning function provided by the specific embodiment of the present invention;

Fig. 2 is a kind of intellectualized and has the structure schematic diagram of the drilling core monitoring system with early warning function provided by the specific embodiment of the present invention (spring compression reaches the maximum state);

Fig. 3 is the schematic diagram of the stress-strain curve of the spring that the specific embodiment of the present invention provides;

Fig. 4 is the schematic diagram of the curve of the elastic force and the displacement of the spring provided by the specific embodiment of the present invention (under the situation that no defect occurs in the cast-in-place pile);

Fig. 5 is the schematic diagram of the curve of the elastic force and time of the spring provided by the specific embodiment of the present invention (under the situation that no defect occurs in the cast-in-place pile);

Fig. 6 is the schematic diagram of the displacement and the time curve of the drilling rod provided by the specific embodiment of the present invention (under the situation that no defect occurs in the cast-in-place pile);

Fig. 7 is the schematic diagram of the curve of the elastic force and displacement of the spring provided by the specific embodiment of the present invention (in the case of defects in cast-in-situ piles);

Fig. 8 is a schematic diagram of the curve of spring force and time provided by a specific embodiment of the present invention (in the case of defects in cast-in-situ piles);

Fig. 9 is a schematic diagram of the displacement and time curve of the drill pipe provided by the specific embodiment of the present invention (in the case of defects in cast-in-situ piles).

reference sign

1. Upper beam; 2. Lower beam; 3. Vertical shaft; 4. Spring; 5. Pressure sensor; 6. Drill pipe; 7. Displacement sensor; 8. Scale; 9. Oil cylinder; 91. Upper cavity of oil cylinder; 92. Oil cylinder Lower chamber; 10, flow indicator.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be understood that when used in this specification and claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and/or components, but do not exclude one or more The presence or addition of other features, integers, steps, operations, elements, components and/or collections thereof.

It should also be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

It should also be further understood that the term "and/or" used in the description of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations .

The present invention provides an intelligent drilling core monitoring system with an early warning function, which includes a drilling rig and a monitoring component, wherein the drilling rig can be a drilling rig currently on the market, for example, an XY-1A drilling rig, but the drilling rig currently on the market directly Use cannot solve the technical problem to be solved by the present invention, let alone achieve the technical effect to be achieved by the present invention. For the present invention, its invention point is to transform the existing drilling rig, increase the monitoring components, and cooperate with specific The detection method can intuitively and quickly determine whether there is a defect in the cast-in-situ pile and the specific location of the defect. The present invention will be described below through specific embodiments.

As shown in Figures 1 and 2, an intelligent drilling core monitoring system with early warning function includes a drilling rig and monitoring components. 1. The lower beam 2 and the vertical shaft 3; the upper end of the vertical shaft 3 is fixedly connected with the upper beam 1, the lower end of the vertical shaft 3 is installed in the lower beam 2, and can move up and down relative to the lower beam 2, and the drill pipe 6 is installed in the upper beam 1 and the lower beam 2, and can move up and down relative to the upper beam 1 and the lower beam 2; the monitoring assembly includes a spring 4, a pressure sensor 5 and a displacement sensor 7; the spring 4 is sleeved on the vertical shaft 3 and is located between the upper beam 1 and the lower beam Between the beams 2 , the pressure sensor 5 is installed on the upper and lower ends of the spring 4 , the displacement sensor 7 is installed on the lower beam 2 , and its top abuts against the upper beam 1 . During the drilling process, the drill rod 6 and the upper crossbeam 1 will move downward synchronously, while the lower crossbeam 2 will remain motionless. At this time, the spring 4 will be compressed, and the displacement sensor 7 will detect the compressed displacement of the spring 4. The pressure sensor 7 detects the load generated when the spring 4 is compressed.

Preferably, the spring 4 is a linear spring whose stiffness does not change with the load. According to Hooke's law, when the spring 4 is elastically deformed, the elastic force F _f of the spring 4 is proportional to the elongation (or compression) x of the spring 4, that is, F=-k*x, where k is the elasticity of the spring 4 Modulus, x is the amount of compression of the spring 4, which is determined by the nature of the material, and its size is equal to the slope of the stress-strain curve from 0 to 1 segment. The stress-strain curve is shown in Figure 3, and the negative sign indicates the spring 4 produced The elastic force is in the opposite direction of its elongation (or compression). The displacement that the drilling rod 6 of drilling rig drills down just can be reflected by the displacement amount that spring 4 is compressed like this.

When the drilling rig just started to work, the weight of the spring 4 and the elastic force of the spring 4 reached a balanced state. Assuming that the compression of the spring 4 by the drill rod 6 was 0 at this moment, as shown in Figure 1, after the drilling rig started to work, the spring 4 is gradually compressed, but the compressed speed is also constant at this time. When the drilling rig drills down at a constant speed, the spring 4 is compressed with the displacement in the elastic stage, and the pressure sensor 5 and the displacement sensor 7 will be sensed. When the compression of the spring 4 is in the range of 0 to S1, the spring 4 will be In the elastic stage, when the amount of compression reaches S1, as shown in Figure 2, the elastic force generated by the spring 4 and the downward pressure of the drilling machine at a constant speed reach a dynamic balance, and it is approximately considered that the spring 4 has reached the limit state, because the drilling machine is moving toward The speed of drilling down is relatively slow, so the influence of inertia on spring 4 is ignored, and the load of spring 4 during the entire detection process is shown in the following formula:

When 0<x<S ₁ , F elastic force=k*x; when x≥S ₁ , F elastic force=F _max ;

In order for the staff to more intuitively perceive the defects of the cast-in-situ pile, the monitoring system of the present invention also includes a dynamic acquisition box and a computer; the computer can be a commonly used computer on the market, or an industrial computer commonly used in industry. The pressure sensor 5 collects the load generated when the displacement of the spring 4 changes, and the displacement sensor 7 collects the displacement of the spring 4 when the elasticity changes. The dynamic acquisition box receives the data collected by the pressure sensor 5 and the displacement sensor 7 and sends it to the computer. Visualization. As shown in Figure 4-9, after the visualization process, the computer can finally draw a chart based on the data, and from the chart, the defect parts and the positions of the defect parts of the cast-in-place pile can be accurately determined. Specifically, the position where the defect occurs can be calculated according to the displacement of the spring in the cycle in which the defect occurs and the displacements of all cycles before the defect occurs. Assuming that the displacement of the spring in the return cycle of the defect is S _n , the number of return cycles of the spring before the defect is n times, and the displacement of the spring in each return cycle S ₁ , then the drill pipe drilling can be determined The displacement is S=nS ₁ +S _n , and the position of the defect can be known by the displacement of the drill pipe. Accurate data provides data support for subsequent treatment of cast-in-place pile defects, and observation is convenient.

From the chart, it can be seen intuitively whether there are defects in cast-in-situ piles because: when the drilling rig starts to work normally, the drill pipe 6 will move downward at a constant speed driven by the motor and under the action of hydraulic pressure. When the drilling rig just starts to work, The weight of the spring 4 and the elastic force of the spring 4 are in an equilibrium state (as shown in Figure 1). After the drill starts to work, the spring 4 is gradually compressed, but at this time the compressed speed is also constant. The spring 4 will be gradually compressed as the drill pipe 6 moves downward at a constant speed. When the drill pipe 6 has a defect in the cast-in-place pile, the spring 4 will be compressed rapidly in a short time. At this time, the pressure sensor 5 and the displacement sensor 7 will feel the sharp change of the spring 4, so that it can be seen intuitively from the drawn chart that in each return cycle (the return cycle refers to the process in which the drill rod 6 drills downward and then moves back upwards) The relationship between the elastic force of the inner spring 4 and the time and the displacement of the spring 4 and the time will change.

Fig. 3 is the stress-strain curve schematic diagram of spring 4, and Fig. 4, Fig. 5 and Fig. 6 are Ft curve diagram, FS curve diagram, St curve diagram of spring 4 under the situation that no defect occurs in cast-in-place pile, and the displacement of drilling is equal to The sum of the displacements of multiple return-period springs 4 is: S=n*S ₁ , where S ₁ is the displacement of one return-period spring.

Fig. 7, Fig. 8 and Fig. 9 are the Ft curve diagram, the FS curve diagram and the St curve diagram of the spring 4 in the case of a defect in the cast-in-place pile. It can be seen from Fig. 7, Fig. 8 and Fig. 9 that there is no difference between the elastic force and displacement curve of spring 4 and the elastic force and displacement curve of spring 4 when there is no defect in the cast-in-situ pile, but the elastic force and time curve of spring 4 and the drill pipe The displacement and time curve of 6 is significantly different from the curve of elastic force and time of spring 4 without defects in the cast-in-situ pile, and the displacement of drill pipe 6. In the curve of elastic force and time of spring 4 (that is, Figure 8) , the slope of the cast-in-place pile becomes significantly larger in the cycle of defects (the angle β ₁ in Figure 8 is greater than the angle α ₁ ), and the time taken for the spring 4 to reach the ultimate load is obviously shortened, and the times t ₁ and t ₂ in Figure 8 It can be clearly identified as the position where the cast-in-situ pile has defects. In addition, in the displacement and time curve of the drill pipe 6 (Fig. 9), the slope of the cast-in-place pile becomes significantly larger in the cycle of the defect (the angle in Fig. 9 β ₂ is greater than the angle α ₂ ), and the cycle time used to complete a cycle is obviously shortened, and the t ₁ and t ₂ sections in Figure 9 can be clearly identified as the positions where the cast-in-place piles have defects.

Since the compression deformation of the spring 4 realizes the early warning function for the detection of defective piles, for the cast-in-place piles without defects in the cast-in-situ piles, the time taken for the compression deformation of the spring 4 to reach the limit value and the elastic force of the spring 4 in one return cycle of the drill pipe 6 The slope of the curve versus time is maintained at a constant level. For defects in cast-in-situ piles, the time it takes for the compression deformation of the spring 4 to reach the limit value of the drill pipe 6 in one return cycle will become smaller and the elastic force of the spring 4 and time The slope of the curve will become larger. According to the abnormal data in the early warning, combined with the concrete core sample drilled out and the phenomenon of returning mud water, the most reasonable judgment of the defective pile is given, which provides data for the final review of the bearing capacity of the design institute. support on . Accurately collected data is used to reflect whether there is a defect in the cast-in-situ pile and the length of the defect.

It should be noted that although changing the rotation speed of the drilling rig will also reduce the time it takes for the spring to compress and deform to the maximum or when the elastic force increases to the maximum, there is still a significant difference in this speed compared to the sharp drop in the defect position of the cast-in-place pile. Yes, through data analysis, it can be clearly distinguished whether the shortening of time is caused by increasing the drilling speed or the shortening of time caused by defects in cast-in-place piles.

In some embodiments, a scale 8 is provided below the upper beam, and scales are engraved on the scale 8, and the scale 8 has the function of a reference object.

It should be noted that the pressure change of the hydraulic system of the drilling rig and the change of oil volume can also reflect the phenomenon of defects in the cast-in-situ pile, and at the same time, the displacement of the drill pipe 6 can be reversed by the change of the pressure value to determine the position of the defect in the cast-in-situ pile. The method is a good supplement to monitoring the core drilling process through the spring 4, and has good engineering practical value.

Specifically, the drilling rig relies on the electric motor to drive the water mill drill bit and the oil pressure system to work together. The motor simply drives the water mill drill pipe 6 to rotate, and the oil pressure system acts from the upper chamber 91 of the oil cylinder to the drill pipe 6 during the drilling process. The top-down push action, the bottom-up push action on the drill pipe 6 from the oil cylinder lower cavity 92 during the tripping process. The displacement of the drill rod 6 is reversed by monitoring the change of the flow rate and the oil pressure in the flow indicator 10 .

During normal drilling, the drilling rig maintains a constant power. Since the volume of the space in the upper chamber 91 of the oil cylinder gradually increases, the air pressure in the upper chamber 91 of the oil cylinder will decrease slightly. 91 oil quantity. When there is a defect in the cast-in-place pile, the volume of the space in the upper chamber 91 of the oil cylinder increases rapidly, and the air pressure in the upper chamber 91 of the corresponding oil cylinder drops sharply, and the reduced air pressure is converted into work done to the drill pipe 6, so that the drill pipe 6 Under the action of the air pressure, the downward acceleration movement can calculate the displacement of the drill pipe 6 when there is a defect in the cast-in-situ pile, so that the pressure value on the indicator and the change of the oil volume can be monitored to warn of the defect in the cast-in-situ pile.

In addition, the working principle of the hydraulic system is as follows:

The oil pump of the drilling rig absorbs oil from the oil tank through the oil filter, and the discharged pressure oil enters the control valve through the pipeline, and the pressure in the system is adjusted through the overflow valve in the control valve, so as to control the pressure at the bottom of the hole to make the drilling rig work normally. Use the quick pressurization handle to increase the pressure in the system rapidly, so that the feed cylinder 9 can be lifted quickly, and the direction of oil in and out of the cylinder 9 can be controlled by operating the reversing lever in the valve, so that the feed cylinder 9 can be raised, For actions such as descending and stopping, there is a one-way throttle valve between the lower chamber 92 of the oil cylinder and the control valve, which is used to adjust the descending speed of the drilling rod 6 . Because there is no one-way valve in this valve, so it does not affect the rapid rise of the drilling rod 6, an indicator is installed between the upper chamber 91 of the oil cylinder and the lower chamber 92 of the oil cylinder through an alternate valve, and the indicator can monitor the change of the air pressure in the oil cylinder 9 and Oil volume changes.

The specific implementation of the present invention also provides a monitoring method using the above-mentioned intelligent drilling core monitoring system with an early warning function, the method comprising the following steps:

S10, collecting in real time the elastic force data generated when the displacement of the spring 4 changes in each cycle;

S20, real-time collection of displacement data of spring 4 elastic changes in each cycle;

S30. Determine whether there is a defect in the cast-in-situ pile and the position of the defect according to the relationship between the elastic force data and the displacement data and time in each cycle.

The elastic force data generated when the displacement of the spring 4 changes within each cycle is collected in real time through the pressure sensor 5 . The displacement data when the spring 4 changes elastically in each cycle is collected in real time by the displacement sensor 7.

Further, the detection method also includes the following steps:

S40, sending the elastic force data, displacement data and time data to the computer;

S50. The computer draws a visual chart according to the elastic force data, displacement data and time data.

In order for the staff to be more intuitively aware of defects in cast-in-situ piles, the pressure sensor 5 collects the load generated when the displacement of the spring 4 changes, the displacement sensor 7 collects the displacement of the spring 4 when the elasticity changes, and the dynamic acquisition box receives the pressure sensor 5 and the displacement. The sensor 7 collects data and sends it to the computer, and the computer performs visual processing on the collected data. After visual processing, the computer can finally draw a chart based on the data, from which the location of the cast-in-place pile defect can be accurately determined, providing data support for the subsequent treatment of cast-in-place pile defect, and easy to observe.

Further, step S30 specifically includes the following steps:

S301. Calculate the time spent when the spring 4 is compressed and deformed to the maximum extent or the elastic force is increased to the maximum extent in each cycle;

S302, judging the time spent when the spring 4 is compressed and deformed to the maximum or the elastic force is increased to the maximum in a certain cycle compared with the spring 4 in other cycles when the compression is deformed to the maximum or the elastic force is increased to the maximum Whether the time spent during the degree decreases, if so, then execute step S303,

S303, then it is determined that the cast-in-place pile has a defect in the cycle in which the spring 4 compresses and deforms to the maximum or the time spent when the elastic force increases to the maximum decreases;

S304. Calculate the position where the defect occurs according to the displacement of the spring 4 in the cycle in which the defect occurs and the displacements of all cycles before the defect occurs.

Since the compression deformation of the spring 4 realizes the early warning function for the detection of defective piles, for the cast-in-place piles without defects in the cast-in-situ piles, the time taken for the compression deformation of the spring 4 to reach the limit value and the elastic force of the spring 4 in one return cycle of the drill pipe 6 The slope of the curve versus time is maintained at a constant level. For defects in cast-in-situ piles, the time it takes for the spring 4 to compress and deform to the limit value within one round of the drill pipe 6 will become smaller and the elastic force of the spring 4 and the time The slope of the curve will become larger. According to the abnormal data in the early warning, combined with the concrete core sample drilled out and the phenomenon of returning mud water, the most reasonable judgment of the defect position of the cast-in-place pile is given, which is the bearing capacity of the final design institute. Reviews provide data support. Accurately collected data is used to reflect the situation and location of defects in cast-in-place piles.

The calculation method of the position of the defect in the cast-in-situ pile is as follows: Assume that the displacement of the spring in the return cycle of the defect is S _n , the number of return cycles of the spring before the defect occurs is n times, and the displacement of the spring in each return cycle S ₁ , then, it can be determined that the displacement of the drill pipe is S=nS ₁ +S _n , and the position of the defect can be known by the displacement of the drill pipe. Accurate data provides data support for subsequent treatment of cast-in-place pile defects, and observation is convenient.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the present invention. Modifications or replacements shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

An intelligent drilling core monitoring system with an early warning function is characterized in that it includes a drilling rig and a monitoring component; the drilling rig includes a drill pipe, an upper beam, a lower beam and a vertical shaft; the upper end of the vertical shaft is fixedly connected to the upper beam, and the lower end of the vertical shaft passes through the It is installed in the lower crossbeam and can move up and down relative to the lower crossbeam. The drill pipe is passed through the upper and lower crossbeams and can move up and down relative to the upper and lower crossbeams; the monitoring components include springs, pressure sensors and displacement sensors; The spring is sleeved on the vertical shaft and located between the upper beam and the lower beam. The pressure sensor is installed on the upper and lower ends of the spring. The displacement sensor is installed on the lower beam, and its top abuts against the upper beam.
A kind of intelligent drilling core monitoring system with early warning function according to claim 1, is characterized in that, also comprises dynamic acquisition box and computer; Dynamic acquisition box receives pressure sensor and displacement sensor to collect data, and sends to computer, The computer visualizes the collected data.
An intelligent drill core monitoring system with an early warning function according to claim 1, wherein the spring is a linear spring whose stiffness does not change with the load.
A monitoring method using an intelligent drilling core monitoring system with an early warning function, characterized in that the method includes:

Real-time collection of elastic force data generated when the spring displacement changes within each cycle;

Real-time collection of displacement data when spring elasticity changes in each cycle;

According to the relationship between elastic force data and displacement data and time in each cycle, it is determined whether there is a defect in the cast-in-situ pile and the position of the defect.
The monitoring method using an intelligent drilling core monitoring system with an early warning function according to claim 4, wherein the method further comprises:

Send elastic data, displacement data and time data to the computer;

The computer draws a visualization based on the elastic force data, displacement data and time data.
According to claim 4, the monitoring method using an intelligent drill core monitoring system with an early warning function is characterized in that, according to the relationship between elastic data and displacement data and time in each return cycle, the cast-in-situ pile is determined Whether there is a defect and the location of the defect, including:

Calculate the time spent when the spring compresses and deforms to the maximum or when the elastic force increases to the maximum in each cycle;

The time it takes to determine when the spring compresses and deforms to the maximum or when the elastic force increases to the maximum in a certain cycle is compared to the time spent when the spring compresses and deforms to the maximum or when the elastic force increases to the maximum in other cycles Whether the time is reduced;

If so, it is determined that the cast-in-situ pile has a defect in the return cycle when the spring compresses and deforms to the maximum or the time spent when the elastic force increases to the maximum decreases;

The location of the defect is calculated according to the displacement of the spring in the cycle in which the defect occurs and the displacements of all cycles before the defect occurs.
The monitoring method using an intelligent drill core monitoring system with early warning function according to claim 4, characterized in that the elastic force data generated when the spring displacement changes in each cycle is collected in real time through the pressure sensor.
According to claim 4, the monitoring method using an intelligent drilling core monitoring system with an early warning function is characterized in that the displacement data of spring elasticity changes in each return cycle is collected in real time by a displacement sensor.
The monitoring method using an intelligent drill core monitoring system with an early warning function according to claim 4, characterized in that the elastic force data and displacement data are sent to the computer through the dynamic acquisition box.