Real-time monitoring device and method for pouring interface of super-long cast-in-situ bored pile

Abstract

The invention relates to the technical field of pile foundation construction quality monitoring, in particular to a real-time monitoring device and method for a pouring interface of an ultra-long cast-in-situ bored pile. Comprising a monitoring probe mechanism, a tension cable, a control holder, a display industrial personal computer and an alarm, the monitoring probe mechanism is placed in a bored hole of the cast-in-place pile, and the tension cable is electrically connected with the monitoring probe mechanism and the display industrial personal computer; the display industrial personal computer is located on the ground, and the monitoring probe mechanism uploads collected data to the display industrial personal computer on the ground in real time through a tension cable; high-precision real-time monitoring of the pouring interface of the super-long cast-in-situ bored pile is achieved, and it is guaranteed that the position of the pouring interface is accurate; meanwhile, the situation that the monitoring probe is blocked and is difficult to recycle is avoided, and the adaptive capacity of the whole device is greatly improved; continuous measurement of different pouring states and stages is achieved, the real-time monitoring device can feed back position information of a pouring interface in real time, constructors can adjust a construction scheme in time, and the construction quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation construction quality monitoring, and specifically to a real-time monitoring device and method for a casting interface of an ultra-long bored cast-in-place pile. Background Art

[0002] With the rapid development of the economy, super high-rise buildings and large bridges are emerging in urban construction. These projects have extremely high requirements for the bearing capacity and stability of the foundation, and super long bored piles, as an effective foundation reinforcement technology, can meet the strict requirements of these large projects for foundation treatment. Super long bored piles drill holes and pour concrete to form long and thin concrete columns, which significantly improve the bearing capacity and stability of the foundation. Under complex geological conditions, such as settlement and earthquake, super long bored piles can play their superior bearing and seismic performance to ensure the safety and stability of the engineering structure. However, in the pouring process of super long bored piles, due to the large hole depth and complex construction environment, the traditional pouring interface monitoring method often has problems such as low accuracy, poor real-time performance, and complex operation. It is difficult to accurately grasp the actual position of the pouring interface, which affects the quality of piles and construction efficiency. The deficiencies of the existing technology are mainly reflected in the following aspects: First, the accuracy is insufficient. Traditional methods such as manual measurement or relying on experience judgment are difficult to accurately reflect the actual position of the pouring interface, which can easily lead to uneven concrete pouring or over-pouring, under-pouring and other phenomena. Second, the real-time performance is poor. Due to the limitation of the measurement method, the measuring sensor is often fixed on the steel cage, and the interface will not respond until it reaches the depth of the sensor. It is impossible to monitor the pouring interface in real time, and it is difficult to detect and correct problems in construction in time. Third, the operation is complicated. Some monitoring equipment has a complex structure and cumbersome operation. Most sensors also need to be fixed before lowering the steel cage, and professional technicians are required to operate and maintain them, which increases construction costs and time. Summary of the invention

[0003] In order to address the deficiencies in the prior art, the present invention provides a real-time monitoring device and method for the casting interface of an ultra-long bored cast-in-place pile. The present invention realizes high-precision real-time monitoring of the casting interface of the ultra-long bored cast-in-place pile, ensuring that the position of the casting interface is accurate; at the same time, it avoids the situation where the monitoring probe is difficult to recover due to being stuck, greatly improving the adaptability of the entire device; the present invention can realize continuous measurement of different casting states and stages, and the real-time monitoring device can instantly feedback the position information of the casting interface, so that construction personnel can adjust the construction plan in time to ensure construction quality.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A real-time monitoring device for the pouring interface of an extra-long bored pile comprises a monitoring probe mechanism, a tension cable, a control platform, a display industrial computer and an alarm. The monitoring probe mechanism is placed in a bored pile hole, and the tension cable is electrically connected to the monitoring probe mechanism and the display industrial computer; the display industrial computer is located on the ground, and the monitoring probe mechanism uploads collected data to the display industrial computer on the ground in real time through the tension cable; the control platform is installed at the orifice of the bored pile hole, and is used to control the movement of the monitoring probe mechanism; the display industrial computer is also used to display, calculate, analyze and store the data collected by the monitoring probe mechanism; the alarm is electrically connected to the display industrial computer, and the alarm is used for calling.

[0006] Furthermore, the monitoring probe mechanism includes an interface measurement probe, a surrounding obstacle avoidance probe, a calibration reflector, an environmental parameter calibration cavity and an environmental parameter probe; the interface measurement probe is located at the bottom of the monitoring probe mechanism, and the interface measurement probe is a wide-frequency ultrasonic transducer with integrated transmitter and receiver, and is used to measure the distance between the bottom of the monitoring probe mechanism and the upper surface of the concrete; the ultrasonic beam excited by the interface measurement probe is directed vertically downward; the surrounding obstacle avoidance probe is located at the upper part of the interface measurement probe, and there are multiple surrounding obstacle avoidance probes, which are evenly deployed along the circumference of the monitoring probe mechanism, and are ultrasonic ranging probes with integrated transmitter and receiver; multiple surrounding obstacle avoidance probes are all perpendicular to the central axis of the monitoring probe on the monitoring probe mechanism; the surrounding obstacle avoidance probe emits sound wave signals in a direction perpendicular to the central axis of the monitoring probe, so as to measure the distance between the periphery of the monitoring probe mechanism and the surrounding environment inside the bored pile.

[0007] Furthermore, the calibration reflector is disc-shaped and is located on the upper part of the surrounding obstacle avoidance probes; a cylindrical environmental parameter calibration cavity is provided above the calibration reflector, and the environmental parameter calibration cavity has an opening for automatically filling the mud in the borehole in real time; the environmental parameter probe is located on the upper part of the environmental parameter calibration cavity; the environmental parameter probe extends into the environmental parameter calibration cavity to measure the acoustic attenuation characteristics of the calibration sound wave signal propagating in the environmental parameter calibration cavity, and is used to monitor the sound speed and frequency parameters of the mud environment in the deep borehole where the probe mechanism is located.

[0008] Furthermore, the interface measurement probe, the surrounding obstacle avoidance probe, the calibration reflector, the environmental parameter calibration cavity and the environmental parameter probe have the same central axis, and the central axis thereof coincides with the central axis of the monitoring probe.

[0009] Furthermore, the control gimbal includes a depth concave roller, a Y-axis guide rail, an X-axis guide rail, a vertical motor component, an X-axis motor component, and a Y-axis motor component; the depth concave roller is a grooved disc, the tension cable is wound around the depth concave roller, and the depth concave roller moves the monitoring probe mechanism up and down by rotating; a depth encoder is installed inside the depth concave roller to measure the depth between the bottom of the monitoring probe mechanism and the bored hole of the bored pile in real time.

[0010] Furthermore, the Y-axis guide rail is a linear guide rail, which controls the deep concave roller to move forward and backward; the X-axis guide rail is a linear guide rail located at both ends of the Y-axis guide rail, which controls the left and right movement of the Y-axis guide rail.

[0011] Furthermore, the vertical motor component is transmission-connected with the deep concave roller to control the forward and reverse rotation of the deep concave roller; the display industrial computer is electrically connected to the vertical motor component to control the drive of the vertical motor component; the X-axis motor component is transmission-connected with the X-axis guide rail to control the left and right movement of the Y-axis guide rail on the X-axis guide rail; the display industrial computer is electrically connected to the X-axis motor component to control the drive of the X-axis motor component; the Y-axis motor component is transmission-connected with the Y-axis guide rail to control the forward and backward movement of the deep concave roller on the Y-axis guide rail; the display industrial computer is electrically connected to the Y-axis motor component to control the drive of the Y-axis motor component.

[0012] A method for monitoring the pouring interface of the super-long bored pile using the real-time monitoring device comprises the following steps: step 1, determining the best measurement position; step 2, determining the working frequency of the sound wave; step 3, determining the pouring interface position;

[0013] The optimal measurement position in step 1 is determined by the following steps:

[0014] Step 1.1: Place the monitoring probe mechanism into the borehole. When the monitoring probe mechanism is located at the hole mouth, the depth encoder on the control platform is cleared to zero, i.e., set to depth 0;

[0015] Step 1.2: The display industrial computer sends acoustic wave excitation and acquisition instructions to the interface measurement probe, surrounding obstacle avoidance probe, and environmental parameter probe in the monitoring probe mechanism, and records the time t1, t2, and t3 used for the first echo respectively; then the mud sound velocity v at the location of the monitoring probe mechanism is v = 2h / t3; h represents the vertical height in the environmental parameter calibration chamber; then the distance between the bottom of the monitoring probe mechanism and the upper surface of the concrete is h1 = t1*v;

[0016] The distance between the periphery of the monitoring probe mechanism and the surrounding environment in the borehole is h2=t2*v; since the surrounding obstacle avoidance probe includes multiple ultrasonic ranging probes, h2 includes multiple values;

[0017] Step 1.3: If h1 is less than the safety threshold H1 set in the monitoring probe mechanism, it means that there is an obstacle below the monitoring probe mechanism; if h1 is not less than the safety threshold H1 set in the monitoring probe mechanism, it means that there is no obstacle below the monitoring probe mechanism; if h2 is less than the safety threshold H2 set in the monitoring probe mechanism, it means that there is an obstacle around the monitoring probe mechanism; if h2 is not less than the safety threshold H2 set in the monitoring probe mechanism, it means that there is no obstacle around the monitoring probe mechanism;

[0018] Step 1.4: The display industrial computer controls the PTZ according to the comparison result of step 1.3.

[0019] If h1≥H1, and h2≥H2, the PTZ is controlled to descend to the set depth H11 under the drive of the vertical motor component, and the monitoring probe mechanism goes to step 1.2;

[0020] If h1≥H1, and h2<H2, the PTZ is controlled to move the monitoring probe mechanism forward and backward or left and right under the joint drive of the X-direction motor component and the Y-direction motor component, so that the monitoring probe mechanism moves to the direction farthest away from the surrounding obstacles, and then proceed to step 1.2;

[0021] If h1

[0022] If h1

[0023] If h1=H1, and h2≧H2, the position of the monitoring probe mechanism is the optimal measurement position.

[0024] Furthermore, the determination of the sound wave operating frequency in step 2 specifically includes the following steps:

[0025] Step 2.1: The industrial computer sends an acoustic wave excitation and acquisition instruction to the environmental parameter probe, and records the maximum sound amplitude of the transmitted sound beam pulse as w1, and the maximum sound amplitude of the first echo sound beam pulse as w2. Then the mud attenuation coefficient A at the location of the monitoring probe mechanism is (ln(w1 / w2)) / (2*h); ln represents the natural logarithm with base e;

[0026] Step 2.2: The calculation expression of the optimal operating frequency ff is: ff = M / (H1*A) 2 ​​; Assume that the highest frequency value of the broadband transducer of the interface measurement probe is FMAX, and the lowest frequency value of the broadband transducer of the interface measurement probe is FMIN, where M is the frequency control factor, which can be selected according to engineering experience data.

[0027] If FMIN≦ff≦FMAX, the value of the optimal operating frequency ff is the acoustic wave operating frequency.

[0028] If ff<FMIN, then the lowest frequency value FMIN of the broadband transducer is the operating frequency of the sound wave.

[0029] If ff>FMAX, the highest frequency value FMAX of the broadband transducer is the operating frequency of the sound wave.

[0030] Furthermore, the casting interface position determination in step 3 specifically includes the following steps:

[0031] Step 3.1: The display industrial computer sends an acoustic wave excitation and acquisition instruction to the interface measurement probe, and the signal frequency of the interface measurement probe is the acoustic wave working frequency determined by step 2; the display industrial computer records the time t1 used by the interface measurement probe to receive the first echo corresponding to the acoustic wave working frequency;

[0032] Step 3.2: The display industrial computer calculates the distance between the bottom of the monitoring probe mechanism and the concrete pouring interface h1 = t1 * mud sound speed v;

[0033] Step 3.2: Display the depth value HS read by the industrial computer from the depth encoder;

[0034] Step 3.3: The distance between the casting interface and the drill hole is h1+HS;

[0035] By determining the optimal measurement position in step 1, determining the acoustic wave working frequency in step 2, and determining the casting interface position in step 3, a single measurement of the casting interface of the super-long bored pile can be achieved. By repeating the above steps, the real-time monitoring process of the casting interface of the super-long bored pile can be achieved.

[0036] If the depth of the super-long bored pile pouring interface is set to HB;

[0037] When h1+HS>HB, after a period of time, h1+HS does not change, that is, concrete pouring is stopped on site, indicating that the pouring interface is insufficient during the pouring process, and the alarm is activated;

[0038] When h1+HS<HB, it means that over-pouring occurs during the pouring process, and the alarm is activated;

[0039] When Δh1<ΔV, it means that the pouring is too slow and the alarm starts to sound;

[0040] When Δh1>ΔV, it means pouring is too fast and the alarm starts to sound;

[0041] Among them, ΔV sets the ideal pouring rate, and Δh1 is the change in the distance between the bottom of the monitoring probe mechanism and the concrete pouring interface per unit time.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] (1) The present invention can not only realize obstacle avoidance of the monitoring probe in the borehole, but also realize the calibration of the characteristic parameters of the environment in the borehole, thereby realizing high-precision real-time monitoring of the casting interface of the ultra-long bored pile, and ensuring the accurate position of the casting interface; at the same time, the present invention can adapt to different mud environments, and the device can ensure that the monitoring probe in the borehole is not in a small space, avoiding the situation where the monitoring probe is difficult to recover due to being stuck, and greatly improving the adaptability of the whole device.

[0044] (2) The device of the present invention can realize automatic control of the position of the monitoring probe mechanism by controlling the pan-tilt head, can realize continuous measurement of different casting states and stages, and can monitor the position of the casting interface in real time, so that construction personnel can adjust the construction plan in time to ensure the construction quality. At the same time, the device of the present invention can realize monitoring work by lowering the monitoring probe mechanism into the borehole only by tensioning the cable. The new monitoring device has a simple structure and is easy to operate, which reduces the technical requirements for operators and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of a real-time monitoring device for the pouring interface of an ultra-long bored pile according to the present invention;

[0046] Figure 2 A schematic diagram of the monitoring probe mechanism structure of a real-time monitoring device for the casting interface of an ultra-long bored pile according to the present invention;

[0047] Figure 3 The present invention is a schematic diagram of the control pan-tilt structure of a real-time monitoring device for the casting interface of an ultra-long bored pile.

[0048] The reference numerals are as follows:

[0049] 1- monitoring probe mechanism; 2- tension cable; 3- control pan / tilt; 4- display industrial computer; 5- alarm; 1.1- interface measurement probe; 1.2- surrounding obstacle avoidance probe; 1.3- calibration reflector; 1.4- environmental parameter calibration chamber; 1.5- environmental parameter probe; 1.6- monitoring probe central axis; 3.1- depth concave roller; 3.2- Y-axis guide rail; 3.3- X-axis guide rail; 3.4- vertical motor component; 3.5- X-axis motor component; 3.6- Y-axis motor component. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0051] Although the steps in the present invention are arranged with numbers, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" used in this article involves and covers any and all possible combinations of one or more of the associated listed items.

[0052] Example

[0053] like Figure 1 to Figure 3 As shown, a real-time monitoring device for the pouring interface of an extra-long bored pile comprises a monitoring probe mechanism 1, a tension cable 2, a control platform 3, a display industrial computer 4 and an alarm 5. The monitoring probe mechanism 1 is placed in the bored pile hole, and the tension cable 2 is electrically connected to the monitoring probe mechanism 1 and the display industrial computer 4; the display industrial computer 4 is located on the ground, and the monitoring probe mechanism 1 uploads the collected data to the display industrial computer 4 on the ground in real time through the tension cable 2; the control platform 3 is installed at the orifice of the bored pile hole, and is used to control the movement of the monitoring probe mechanism 1; the display industrial computer 4 is also used for displaying, calculating, analyzing and storing the data collected by the monitoring probe mechanism 1; the alarm 5 is electrically connected to the display industrial computer 4, and the alarm 5 is used for calling.

[0054] It is worth noting that the industrial computer 4, the alarm 5, etc. displayed in the present invention are all existing technologies, and are powered by an external power supply, which will not be described in detail here.

[0055] Furthermore, the monitoring probe mechanism 1 includes an interface measurement probe 1.1, a surrounding obstacle avoidance probe 1.2, a calibration reflector 1.3, an environmental parameter calibration cavity 1.4 and an environmental parameter probe 1.5; the interface measurement probe 1.1 is located at the bottom of the monitoring probe mechanism 1, and the interface measurement probe 1.1 is a wide-frequency ultrasonic transducer with integrated transmitter and receiver, and is used to measure the distance between the bottom of the monitoring probe mechanism 1 and the upper surface of the concrete; the ultrasonic beam excited by the interface measurement probe 1.1 is vertically downward; the surrounding obstacle avoidance probe 1.2 is located at the upper part of the interface measurement probe 1.1, and there are multiple surrounding obstacle avoidance probes 1.2, which are evenly deployed along the circumference of the monitoring probe mechanism 1, and are ultrasonic ranging probes with integrated transmitter and receiver; multiple surrounding obstacle avoidance probes 1.2 are all perpendicular to the central axis 1.6 of the monitoring probe on the monitoring probe mechanism 1; the surrounding obstacle avoidance probe 1.2 emits sound wave signals in a direction perpendicular to the central axis 1.6 of the monitoring probe, so as to measure the distance between the periphery of the monitoring probe mechanism 1 and the surrounding environment in the bored pile.

[0056] Furthermore, the calibration reflector 1.3 is disc-shaped and is located on the upper part of the surrounding obstacle avoidance probe 1.2; a cylindrical environmental parameter calibration cavity 1.4 is provided above the calibration reflector 1.3, and the environmental parameter calibration cavity 1.4 has an opening for automatically filling the mud in the borehole in real time; the environmental parameter probe 1.5 is located on the upper part of the environmental parameter calibration cavity 1.4; the environmental parameter probe 1.5 extends into the environmental parameter calibration cavity 1.4, and is used to measure the acoustic attenuation characteristics of the calibration sound wave signal propagating in the environmental parameter calibration cavity 1.4, and is used to monitor the sound speed and frequency parameters of the mud environment in the deep borehole where the probe mechanism 1 is located.

[0057] Furthermore, the interface measurement probe 1.1, the surrounding obstacle avoidance probe 1.2, the calibration reflector 1.3, the environmental parameter calibration cavity 1.4 and the environmental parameter probe 1.5 have the same central axis, and the central axis thereof coincides with the central axis 1.6 of the monitoring probe.

[0058] Furthermore, the control gimbal 3 includes a depth concave roller 3.1, a Y-axis guide rail 3.2, an X-axis guide rail 3.3, a vertical motor component 3.4, an X-axis motor component 3.5, and a Y-axis motor component 3.6; the depth concave roller 3.1 is a grooved disc, the tension cable 2 is wound around the depth concave roller 3.1, and the depth concave roller 3.1 moves the monitoring probe mechanism 1 up and down by rotating; the depth concave roller 3.1 is equipped with a depth encoder to measure the depth from the bottom of the monitoring probe mechanism 1 to the bored pile hole in real time.

[0059] It is worth noting that the depth encoder is a linear encoder that can measure changes in length or depth. It is a prior art and will not be described in detail here.

[0060] Furthermore, the Y-axis guide rail 3.2 is a linear guide rail, which controls the deep concave roller 3.1 to move forward and backward; the X-axis guide rail 3.3 is a linear guide rail located at both ends of the Y-axis guide rail 3.2, which controls the left and right movement of the Y-axis guide rail 3.2.

[0061] It is worth noting that the linear guide is an existing mature technology. For example, a platform is slidably connected to the guide, and a controlled object is mounted on the platform. The platform moves through a motor gear meshing connection or a lead screw connection. As long as the movement can be achieved, no further limitation is made here.

[0062] Furthermore, the vertical motor component 3.4 is transmission-connected with the deep concave roller 3.1 for controlling the forward and reverse rotation of the deep concave roller 3.1; the display industrial computer 4 is electrically connected with the vertical motor component 3.4 for controlling the drive of the vertical motor component 3.4; the X-axis motor component 3.5 is transmission-connected with the X-axis guide rail 3.3 for controlling the left and right movement of the Y-axis guide rail 3.2 on the X-axis guide rail 3.3; the display industrial computer 4 is electrically connected with the X-axis motor component 3.5 for controlling the drive of the X-axis motor component 3.5; the Y-axis motor component 3.6 is transmission-connected with the Y-axis guide rail 3.2 for controlling the forward and backward movement of the deep concave roller 3.1 on the Y-axis guide rail 3.2; the display industrial computer 4 is electrically connected with the Y-axis motor component 3.6 for controlling the drive of the Y-axis motor component 3.6.

[0063] A method for monitoring the pouring interface of the super-long bored pile using the real-time monitoring device comprises the following steps: step 1, determining the best measurement position; step 2, determining the working frequency of the sound wave; step 3, determining the pouring interface position;

[0064] The optimal measurement position in step 1 is determined by the following steps:

[0065] Step 1.1: Place the monitoring probe mechanism 1 into the borehole. When the monitoring probe mechanism 1 is located at the hole mouth, the depth encoder on the control platform 3 is cleared to zero, that is, set to depth 0;

[0066] Step 1.2: The industrial computer 4 sends acoustic wave excitation and acquisition instructions to the interface measurement probe 1.1, the surrounding obstacle avoidance probe 1.2, and the environmental parameter probe 1.5 in the monitoring probe mechanism 1, and respectively records the time t1, t2, and t3 used for the first echo; then the mud sound velocity v at the location of the monitoring probe mechanism 1 is v = 2h / t3; h represents the vertical height in the environmental parameter calibration cavity 1.4; then the distance between the bottom of the monitoring probe mechanism 1 and the upper surface of the concrete is h1 = t1*v;

[0067] The distance between the periphery of the monitoring probe mechanism 1 and the surrounding environment in the borehole is h2=t2*v; since the surrounding obstacle avoidance probe 1.2 includes multiple ultrasonic ranging probes, h2 includes multiple values;

[0068] Step 1.3: If h1 is less than the safety threshold H1 set in the monitoring probe mechanism 1, it means that there is an obstacle below the monitoring probe mechanism 1; if h1 is not less than the safety threshold H1 set in the monitoring probe mechanism 1, it means that there is no obstacle below the monitoring probe mechanism 1; if h2 is less than the safety threshold H2 set in the monitoring probe mechanism 1, it means that there is an obstacle around the monitoring probe mechanism 1; if h2 is not less than the safety threshold H2 set in the monitoring probe mechanism 1, it means that there is no obstacle around the monitoring probe mechanism 1;

[0069] Step 1.4: The display industrial computer 4 controls the PTZ 3 according to the comparison result of step 1.3.

[0070] If h1≥H1, and h2≥H2, the pan / tilt platform 3 is controlled to lower the monitoring probe mechanism 1 to the set depth H11 under the drive of the vertical motor component 3.4, and the process goes to step 1.2;

[0071] If h1≥H1, and h2<H2, the pan / tilt 3 is controlled to move the monitoring probe mechanism 1 forward and backward or left and right under the joint drive of the X-direction motor component 3.5 and the Y-direction motor component 3.6, so that the monitoring probe mechanism 1 moves to the direction farthest away from the surrounding obstacles, and then proceeds to step 1.2;

[0072] If h1

[0073] If h1

[0074] If h1=H1, and h2≧H2, the position of the monitoring probe mechanism 1 is the optimal measurement position.

[0075] Furthermore, the determination of the sound wave operating frequency in step 2 specifically includes the following steps:

[0076] Step 2.1: The industrial computer 4 sends an acoustic wave excitation and acquisition instruction to the environmental parameter probe 1.5, and records the maximum sound amplitude of the transmitted sound beam pulse as w1, and the maximum sound amplitude of the first echo sound beam pulse as w2. Then the mud attenuation coefficient A at the location of the monitoring probe mechanism 1 is (ln(w1 / w2)) / (2*h); ln represents the natural logarithm with base e; ​​

[0077] Step 2.2: The calculation expression of the optimal operating frequency ff is: ff = M / (H1*A) 2 ; Assume that the highest frequency value of the broadband transducer of the interface measurement probe 1.1 is FMAX, and the lowest frequency value of the broadband transducer of the interface measurement probe 1.1 is FMIN, where M is the frequency control factor, which can be selected according to engineering experience data,

[0078] If FMIN≦ff≦FMAX, the value of the optimal operating frequency ff is the acoustic wave operating frequency.

[0079] If ff<FMIN, then the lowest frequency value FMIN of the broadband transducer is the operating frequency of the sound wave.

[0080] If ff>FMAX, the highest frequency value FMAX of the broadband transducer is the operating frequency of the sound wave.

[0081] Furthermore, the casting interface position determination in step 3 specifically includes the following steps:

[0082] Step 3.1: The display industrial computer 4 sends an acoustic wave excitation and acquisition instruction to the interface measurement probe 1.1, and the signal frequency of the interface measurement probe 1.1 is the acoustic wave working frequency determined by step 2; the display industrial computer 4 records the time t1 taken by the interface measurement probe 1.1 to receive the first echo corresponding to the acoustic wave working frequency;

[0083] Step 3.2: The industrial computer 4 calculates the distance h1=t1*mud sound velocity v between the bottom of the monitoring probe mechanism 1 and the concrete pouring interface;

[0084] Step 3.2: Display the depth value HS read by the industrial computer 4 from the depth encoder;

[0085] Step 3.3: The distance between the casting interface and the drill hole is h1+HS;

[0086] The present invention can not only realize obstacle avoidance of the monitoring probe in the borehole, but also realize the calibration of characteristic parameters of the environment in the borehole, thereby realizing high-precision real-time monitoring of the casting interface of the super-long bored pile, and ensuring the accurate position of the casting interface; at the same time, the present invention can adapt to different mud environments, and the device can ensure that the monitoring probe in the borehole is not in a small space, avoiding the situation where the monitoring probe is difficult to recover due to being stuck, and greatly improving the adaptability of the whole device.

[0087] By determining the optimal measurement position in step 1, determining the acoustic wave working frequency in step 2, and determining the casting interface position in step 3, a single measurement of the casting interface of the super-long bored pile can be achieved. By repeating the above steps, the real-time monitoring process of the casting interface of the super-long bored pile can be achieved.

[0088] If the depth of the super-long bored pile pouring interface is set to HB;

[0089] When h1+HS>HB, after a period of time, h1+HS does not change, that is, the concrete pouring is stopped on site, indicating that the pouring interface is insufficient during the pouring process, and the alarm 5 starts to alarm;

[0090] When h1+HS<HB, it indicates that over-pouring occurs during the pouring process, and the alarm 5 starts to alarm;

[0091] When Δh1<ΔV, it means that the pouring is too slow, and the alarm 5 starts to alarm;

[0092] When Δh1>ΔV, it means that the pouring is too fast, and the alarm 5 starts to alarm;

[0093] Among them, ΔV sets the ideal pouring rate, and Δh1 is the change value of the distance between the bottom of the monitoring probe mechanism 1 and the concrete pouring interface per unit time.

[0094] The device of the present invention can realize automatic control of the position of the monitoring probe mechanism by controlling the pan-tilt platform, can realize continuous measurement of different casting states and stages, and can monitor the device in real time to instantly feedback the position information of the casting interface, so that construction personnel can adjust the construction plan in time to ensure the construction quality; at the same time, the device of the present invention can realize the monitoring work only by lowering the monitoring probe mechanism to the inside of the borehole through the tension cable. The new monitoring device has a simple structure and is easy to operate, which reduces the technical requirements for operators and improves construction efficiency.

[0095] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and changes without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A real-time monitoring device for the pouring interface of an ultra-long bored pile, characterized in that: The invention comprises a monitoring probe mechanism (1), a tension cable (2), a control platform (3), a display industrial computer (4) and an alarm (5), wherein the monitoring probe mechanism (1) is placed in a bored pile hole, the tension cable (2) is electrically connected to the monitoring probe mechanism (1) and the display industrial computer (4); the display industrial computer (4) is located on the ground, and the monitoring probe mechanism (1) uploads the collected data to the display industrial computer (4) on the ground in real time through the tension cable (2); the control platform (3) is installed at the opening of the bored pile hole and is used to control the movement of the monitoring probe mechanism (1); the display industrial computer (4) is also used to display, calculate, analyze and store the data collected by the monitoring probe mechanism (1); the alarm (5) is electrically connected to the display industrial computer (4), and the alarm (5) is used for calling.

2. According to claim 1, a real-time monitoring device for the pouring interface of an ultra-long bored pile, characterized in that: The monitoring probe mechanism (1) comprises an interface measurement probe (1.1), a surrounding obstacle avoidance probe (1.2), a calibration reflector (1.3), an environmental parameter calibration cavity (1.4) and an environmental parameter probe (1.5); the interface measurement probe (1.1) is located at the bottom of the monitoring probe mechanism (1), and the interface measurement probe (1.1) is a wide-frequency ultrasonic transducer with integrated transceiver and is used to measure the distance between the bottom of the monitoring probe mechanism (1) and the upper surface of concrete; the ultrasonic beam excited by the interface measurement probe (1.1) is directed vertically downward; the surrounding obstacle avoidance probe (1.2) is directed vertically downward; the surrounding obstacle avoidance probe (1.3) is directed vertically downward; the surrounding obstacle avoidance probe (1.2) is directed vertically downward; the surrounding obstacle avoidance probe (1.3) is directed vertically downward; the surrounding obstacle avoidance probe (1.3) is directed vertically downward; the surrounding obstacle avoidance probe (1.4) is directed vertically downward; the surrounding obstacle avoidance probe (1.5 .... The surrounding obstacle avoidance probe (1.2) is located on the upper part of the interface measurement probe (1.1); there are a plurality of surrounding obstacle avoidance probes (1.2), which are evenly deployed along the circumference of the monitoring probe mechanism (1), and are ultrasonic distance measurement probes with integrated transmission and reception; the plurality of surrounding obstacle avoidance probes (1.2) are all perpendicular to the central axis (1.6) of the monitoring probe on the monitoring probe mechanism (1); the surrounding obstacle avoidance probe (1.2) emits a sound wave signal in a direction perpendicular to the central axis (1.6) of the monitoring probe, so as to measure the distance between the periphery of the monitoring probe mechanism (1) and the surrounding environment in the bored pile hole.

3. According to claim 2, a real-time monitoring device for the pouring interface of an ultra-long bored pile is characterized in that: The calibration reflector (1.3) is in the shape of a disk and is located on the upper part of the surrounding obstacle avoidance probe (1.2); a cylindrical environmental parameter calibration cavity (1.4) is provided above the calibration reflector (1.3); the environmental parameter calibration cavity (1.4) has an opening for automatically filling mud in a borehole in real time; the environmental parameter probe (1.5) is located on the upper part of the environmental parameter calibration cavity (1.4); the environmental parameter probe (1.5) extends into the environmental parameter calibration cavity (1.4) and is used to measure the acoustic attenuation characteristics of the calibration sound wave signal propagating in the environmental parameter calibration cavity (1.4), and is used to monitor the sound velocity and frequency parameters of the mud environment in the deep borehole where the probe mechanism (1) is located.

4. According to claim 3, a real-time monitoring device for the pouring interface of an ultra-long bored pile is characterized in that: The interface measurement probe (1.1), the surrounding obstacle avoidance probe (1.2), the calibration reflector (1.3), the environmental parameter calibration cavity (1.4) and the environmental parameter probe (1.5) have the same central axis, and the central axis thereof coincides with the central axis (1.6) of the monitoring probe.

5. According to claim 1, a real-time monitoring device for the pouring interface of an ultra-long bored pile, characterized in that: The control platform (3) comprises a deep concave roller (3.1), a Y-axis guide rail (3.2), an X-axis guide rail (3.3), a vertical motor component (3.4), an X-axis motor component (3.5), and a Y-axis motor component (3.6); the deep concave roller (3.1) is a grooved disc, the tension cable (2) is wound around the deep concave roller (3.1), and the deep concave roller (3.1) moves the monitoring probe mechanism (1) up and down by rotating; a depth encoder is installed inside the deep concave roller (3.1) to measure the depth from the bottom of the monitoring probe mechanism (1) to the bored pile hole in real time.

6. A real-time monitoring device for the pouring interface of an ultra-long bored pile according to claim 5, characterized in that: The Y-axis guide rail (3.2) is a linear guide rail, which controls the deep concave roller (3.1) to move forward and backward; the X-axis guide rail (3.3) is a linear guide rail located at both ends of the Y-axis guide rail (3.2), which controls the left and right movement of the Y-axis guide rail (3.2).

7. A real-time monitoring device for the pouring interface of an ultra-long bored pile according to claim 6, characterized in that: The vertical motor component (3.4) is in driving connection with the deep concave roller (3.1) and is used to control the forward and reverse rotation of the deep concave roller (3.1); the display industrial computer (4) is electrically connected with the vertical motor component (3.4) and is used to control the drive of the vertical motor component (3.4); the X-axis motor component (3.5) is in driving connection with the X-axis guide rail (3.3) and is used to control the left and right movement of the Y-axis guide rail (3.2) on the X-axis guide rail (3.3). The display industrial computer (4) is electrically connected to the X-axis motor component (3.5) to control the driving of the X-axis motor component (3.5); the Y-axis motor component (3.6) is drivingly connected to the Y-axis guide rail (3.2) to control the forward and backward movement of the deep concave roller (3.1) on the Y-axis guide rail (3.2); the display industrial computer (4) is electrically connected to the Y-axis motor component (3.6) to control the driving of the Y-axis motor component (3.6).

8. A method for monitoring using the real-time monitoring device for the pouring interface of an ultra-long bored pile according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: step 1, determining the best measurement position; step 2, determining the working frequency of the acoustic wave; step 3, determining the position of the casting interface; The optimal measurement position in step 1 is determined by the following steps: Step 1.1: Place the monitoring probe mechanism (1) into the borehole. When the monitoring probe mechanism (1) is located at the hole mouth, the depth encoder on the control platform (3) is reset to zero, i.e., set to depth 0; Step 1.2: The display industrial computer (4) sends acoustic wave excitation and acquisition instructions to the interface measurement probe (1.1), the surrounding obstacle avoidance probe (1.2), and the environmental parameter probe (1.5) in the monitoring probe mechanism (1), and respectively records the time t1, t2, and t3 used for the first echo; then the mud sound velocity v at the location of the monitoring probe mechanism (1) is v = 2h / t3; h represents the vertical height in the environmental parameter calibration cavity (1.4); then the distance between the bottom of the monitoring probe mechanism (1) and the upper surface of the concrete is h1 = t1*v; The distance between the periphery of the monitoring probe mechanism (1) and the surrounding environment in the borehole is h2=t2*v; since the surrounding obstacle avoidance probe (1.2) includes multiple ultrasonic ranging probes, h2 includes multiple values; Step 1.3: If h1 is less than the safety threshold H1 set in the monitoring probe mechanism (1), it means that there is an obstacle below the monitoring probe mechanism (1); if h1 is not less than the safety threshold H1 set in the monitoring probe mechanism (1), it means that there is no obstacle below the monitoring probe mechanism (1); if h2 is less than the safety threshold H2 set in the monitoring probe mechanism (1), it means that there is an obstacle around the monitoring probe mechanism (1); if h2 is not less than the safety threshold H2 set in the monitoring probe mechanism (1), it means that there is no obstacle around the monitoring probe mechanism (1); Step 1.4: The display industrial computer (4) controls the PTZ (3) according to the comparison result of step 1.

3. If h1≥H1, and h2≥H2, the pan / tilt platform (3) is controlled to be driven by the vertical motor component (3.4), and the monitoring probe mechanism (1) is lowered to the set depth H11, and the process goes to step 1.2; If h1≥H1, and h2<H2, the pan / tilt platform (3) is controlled to move the monitoring probe mechanism (1) forward or backward or left or right under the joint drive of the X-direction motor component (3.5) and the Y-direction motor component (3.6), so that the monitoring probe mechanism (1) moves to the direction farthest away from the surrounding obstacles, and the process goes to step 1.2; If h1<H1, and h2<H2, the alarm (5) is activated, the control platform (3) is driven by the vertical motor component (3.4), the monitoring probe mechanism (1) rises to the borehole, and the control platform (3) is moved to another position, and the process goes to step 1.1; If h1<H1, and h2≧H2, the pan / tilt platform (3) is controlled to rise to the set depth H11 under the drive of the vertical motor component (3.4), and the monitoring probe mechanism (1) is entered into step 1.2; If h1=H1, and h2≧H2, the position of the monitoring probe mechanism (1) is the optimal measurement position.

9. The method according to claim 8, characterized in that The specific steps for determining the acoustic wave operating frequency in step 2 are as follows: Step 2.1: The display industrial computer (4) sends an acoustic wave excitation and acquisition instruction to the environmental parameter probe (1.5), and records the maximum sound amplitude of the transmitted sound beam pulse as w1, and the maximum sound amplitude of the first echo sound beam pulse as w2. Then the mud attenuation coefficient A at the location of the monitoring probe mechanism (1) is (ln(w1 / w2)) / (2*h); ln represents the natural logarithm with base e; Step 2.2: The calculation expression of the optimal operating frequency ff is: ff = M / (H1*A) 2 ; Assume that the maximum frequency value of the broadband transducer of the interface measurement probe (1.1) is FMAX, and the minimum frequency value of the broadband transducer of the interface measurement probe (1.1) is FMIN, where M is a frequency control factor, which can be selected according to engineering experience data, If FMIN≦ff≦FMAX, the value of the optimal operating frequency ff is the acoustic wave operating frequency. If ff<FMIN, then the lowest frequency value FMIN of the broadband transducer is the operating frequency of the sound wave. If ff>FMAX, the highest frequency value FMAX of the broadband transducer is the operating frequency of the sound wave.

10. The method according to claim 9, characterized in that The specific steps to determine the pouring interface position in step 3 are as follows: Step 3.1: the display industrial computer (4) sends an acoustic wave excitation and acquisition instruction to the interface measurement probe (1.1), wherein the signal frequency of the interface measurement probe (1.1) is the acoustic wave operating frequency determined in step 2; the display industrial computer (4) records the time t1 taken by the interface measurement probe (1.1) to receive the first echo corresponding to the acoustic wave operating frequency; Step 3.2: The display industrial computer (4) calculates the distance h1=t1*mud sound velocity v between the bottom of the monitoring probe mechanism (1) and the concrete pouring interface; Step 3.2: The industrial computer (4) reads the depth value HS of the depth encoder; Step 3.3: The distance between the casting interface and the drill hole is h1+HS; By determining the optimal measurement position in step 1, determining the acoustic wave working frequency in step 2, and determining the casting interface position in step 3, a single measurement of the casting interface of the super-long bored pile can be achieved. By repeating the above steps, the real-time monitoring process of the casting interface of the super-long bored pile can be achieved. If the depth of the super-long bored pile pouring interface is set to HB; When h1+HS>HB, after a period of time, h1+HS does not change, that is, the concrete pouring is stopped on site, indicating that the pouring interface is insufficient during the pouring process, and the alarm (5) starts to alarm; When h1+HS<HB, it indicates that over-pouring occurs during the pouring process, and the alarm (5) starts to alarm; When Δh1<ΔV, it means that the pouring is too slow, and the alarm (5) starts to alarm; When Δh1>ΔV, it means that the pouring is too fast, and the alarm (5) starts to alarm; Among them, ΔV sets the ideal pouring rate, and Δh1 is the change value of the distance between the bottom of the monitoring probe mechanism (1) and the concrete pouring interface per unit time.

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