Socketed pile sediment detection device based on high-resolution parametric array sonar detection

Abstract

The invention discloses a socketed pile sediment detection device based on high-resolution parametric array sonar detection, and relates to the technical field of detection equipment.The socketed pile sediment detection device comprises an ultrasonic transceiver and a crane and further comprises a self-centering mechanism, the self-centering mechanism comprises a connecting block arranged vertically, a supporting shaft is concentrically and fixedly installed at the top of the connecting block, and the supporting shaft is connected with the ultrasonic transceiver; a baffle is fixedly installed at the top end of the supporting shaft, and the supporting shaft between the connecting block and the baffle is slidably sleeved with a main balancing weight in the vertical direction. A plurality of vertically-arranged centering rods are evenly arranged on the circumferential side of the connecting block in the circumferential direction. According to the socketed pile sediment detection device based on high-resolution parametric array sonar detection, through cooperative arrangement of the crane and the self-centering mechanism, the ultrasonic transceiver can be rapidly located at the axis of a pile hole and is parallel to the axis of the pile hole, the detection efficiency is improved, and the accuracy of a measurement result can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, and in particular to a rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection. Background Art

[0002] Pile foundations are generally used in projects with high requirements for foundations, especially in the construction of high-rise buildings, important structures and foundations of buildings with large loads. However, the sediment formed at the bottom of the hole by the broken sand and gravel dropped during the pile foundation drilling process has high compressibility, which will increase the settlement, change the bearing performance of the pile foundation, and affect the bearing capacity of the bored pile. The application of ultrasonic detection technology in the detection of pile bottom sediment thickness has been studied and developed. This technology captures the reflected signal of the ultrasonic wave at the bottom of the pile and its surrounding environment by arranging an ultrasonic probe below the liquid surface at the pile mouth. Due to the differences in the penetration ability and reflection characteristics of ultrasonic waves of different frequencies to the medium, by analyzing the reflection characteristics of these multi-frequency signals, the thickness and properties of the pile bottom sediment can be more comprehensively understood. When using ultrasonic waves to detect the thickness and properties of the pile bottom sediment, in order to ensure the accuracy of the test results, the ultrasonic transmitter and receiver need to be placed at the axis of the pile hole and parallel to the axis of the pile hole. However, due to the lack of corresponding placement tools, manual placement is required, but manual placement has large deviations and errors, and requires repeated adjustments, and low work efficiency. Summary of the invention

[0003] Technical problem to be solved: The purpose of the present invention is to provide a rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection, so as to solve the problems raised in the above-mentioned background technology that the manual placement of ultrasonic transmitters and receivers has large deviations and errors, and requires repeated adjustments, resulting in low work efficiency.

[0004] Technical solution: To achieve the above purpose, the present invention is implemented through the following technical solutions: a rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection, including an ultrasonic transmitter and receiver and a crane, and also including a self-centering mechanism, the self-centering mechanism includes a connecting block arranged vertically, a support shaft is fixedly installed concentrically on the top of the connecting block, a baffle is fixedly installed on the top of the support shaft, a main counterweight block is vertically slidably sleeved on the support shaft between the connecting block and the baffle, and the main counterweight block is suspended on the hook of the crane; a plurality of vertically arranged centering rods are evenly arranged along the circumference on the circumference of the connecting block, two mutually parallel connecting rods are vertically spaced between each centering rod and the connecting block, and the two ends of the two connecting rods are respectively hinged to the connecting block and the centering rod; at least two horizontal rods are evenly fixedly installed on the upper part of the connecting block along the circumference, a pull rod is hinged on the top of each centering rod, and the other end of the pull rod is hinged to the main counterweight block, and the ultrasonic transmitter and receiver is fixedly installed at the bottom of the connecting block.

[0005] Preferably, three lifting ears are evenly and fixedly installed on the top of the main counterweight block along the circumference, a hanging ring is hung on the hook of the crane, and the three lifting ears are connected to the hanging ring through steel wire ropes.

[0006] Preferably, an annular groove is provided at the upper end of the main counterweight block, and an auxiliary counterweight block is slidably mounted on the support shaft between the baffle and the main counterweight block. Three vertical through holes are evenly arranged at the top of the auxiliary counterweight block along the circumference, and a suspension rod is slidably installed in the through holes. Each lifting ear is fixedly installed on the top of the corresponding suspension rod, and the bottom end of the suspension rod is fixedly connected to the main counterweight block. Limiting components are provided on the support shafts below the main counterweight block and the auxiliary counterweight block.

[0007] Preferably, a cavity is provided inside the support shaft, and a slide groove connected to the cavity is radially provided on the support shaft. The limiting assembly includes a pin slidably installed in the slide groove, one end of the pin extends into the cavity of the support shaft and is fixedly installed with a sleeve, a sliding rod is slidably sleeved in the sleeve, and one end of the sliding rod away from the pin is fixedly connected to the inner wall of the cavity, and a spring is sleeved on the sliding rod between the sleeve and the inner wall of the cavity.

[0008] Preferably, the two limit assemblies are symmetrically arranged on both sides of the support shaft, and a transmission assembly is provided between the two limit assemblies, the transmission assembly includes a rotating shaft fixedly installed radially in the cavity of the support shaft, a connecting plate is rotatably installed on the rotating shaft, slots are provided at both ends of the connecting plate, sliders are slidably installed in the slots, and the two sliders are respectively fixedly connected to the pins on the adjacent sides.

[0009] Preferably, the distance between the latch pin below the main counterweight block and the top of the connecting block is a, and the thickness of the main counterweight block is b, wherein a <b。

[0010] Preferably, the depth of the annular groove is c, the thickness of the auxiliary counterweight block is d, and the distance between the latch pin below the auxiliary counterweight block and the bottom of the baffle is e, wherein d <e<d+c。

[0011] Beneficial effect: Compared with the prior art, the present invention provides a rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection. The rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection has a unique structure and is easy to use. The detection device moves the self-centering mechanism to the top of the pile hole by a crane and slowly descends until the horizontal rod contacts the ground. At this time, the self-centering mechanism is stably supported on the pile hole, and the ultrasonic transmitter and receiver is immersed in the mud in the pile hole to prepare for subsequent measurements. The main counterweight block continues to move downward, and through the connection between the pull rod and the centering rod, multiple centering rods are simultaneously expanded radially outward. Due to the parallel four-bar mechanism composed of the connecting block, the centering rod and the connecting rod, it is ensured that the centering rod can be evenly and stably expanded until it touches the inner wall of the pile hole, thereby not only quickly making the ultrasonic transmitter and receiver located at the axis of the pile hole and parallel to the axis line of the pile hole, thereby improving the detection efficiency, but also effectively improving the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 It is a front view schematic diagram of the self-centering mechanism of the present invention; Figure 3 It is a cross-sectional schematic diagram of the present invention; Figure 4 It is a schematic diagram of the initial state of the main and auxiliary counterweight blocks of the present invention; Figure 5 It is a schematic diagram of the main counterweight of the present invention when it falls; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure of area A in the middle.

[0013] In the figure: 1. connecting block; 2. ultrasonic transmitter and receiver; 3. centering rod; 4. connecting rod; 5. pulling rod; 6. supporting shaft; 7. main counterweight; 8. baffle; 9. lifting ear; 10. horizontal rod; 11. crane; 12. latch; 13. sleeve; 14. sliding rod; 15. spring; 16. rotating shaft; 17. connecting plate; 18. ring groove; 19. auxiliary counterweight; 20. hanging rod. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Embodiment 1: This embodiment 1 provides a rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection, which is directly improved on the existing ultrasonic pile bottom sediment thickness detection device and has a unique structure. Figure 1-6As shown, it includes an ultrasonic transmitter and receiver 2 and a crane 11, and also includes a self-centering mechanism, which includes a connecting block 1 arranged vertically, a supporting shaft 6 is concentrically fixedly installed on the top of the connecting block 1, a baffle 8 is fixedly installed on the top of the supporting shaft 6, and a main counterweight block 7 is vertically slidably sleeved on the supporting shaft 6 between the connecting block 1 and the baffle 8, and the main counterweight block 7 is suspended on the hook of the crane 11.

[0016] There are many ways to suspend the main counterweight block 7, for example: three lifting ears 9 are evenly fixedly installed on the top of the main counterweight block 7 along the circumference, and a hanging ring is hung on the hook of the crane 11. The three lifting ears 9 are connected to the hanging ring by wire ropes, so that the crane 11 always keeps the self-centering mechanism in a vertical state when moving the self-centering mechanism; a plurality of vertically arranged centering rods 3 are evenly arranged on the circumference of the circumference of the connecting block 1, and two parallel connecting rods 4 are vertically spaced between each centering rod 3 and the connecting block 1, and the two ends of the two connecting rods 4 are respectively hinged to the connecting block 1 and the centering rod 3; at least two horizontal rods 10 are evenly fixedly installed on the upper part of the connecting block 1 along the circumference, and a pull rod 5 is hinged on the top of each centering rod 3, and the other end of the pull rod 5 is hinged to the main counterweight block 7, and the ultrasonic transmitter and receiver 2 is fixedly installed at the bottom of the connecting block 1.

[0017] Working principle: When we use the detection device to detect the thickness of the sediment in the pile hole, first move the self-centering mechanism to the top of the pile hole through the crane 11, and then slowly move the self-centering mechanism downward until the horizontal rod 10 contacts the ground. At this time, the self-centering mechanism is supported on the pile hole, and the ultrasonic transmitter and receiver 2 is immersed in the mud in the pile hole, and then continue to move the main counterweight block 7 downward. During the downward movement, the main counterweight block 7 drives the centering rod 3 to move through the pull rod 5. In addition, since the connecting block 1 and the centering rod 3 and the connecting rod 4 between the connecting block 1 and the centering rod 3 together constitute a parallel four-bar linkage, when the pull rod 5 drives the centering rod 3 to move, multiple centering rods 3 simultaneously expand radially outward until multiple centering rods 3 are in contact with the inner wall of the pile hole. At this time, the ultrasonic transmitter and receiver 2 is located at the axis of the pile hole and parallel to the axis of the pile hole, thereby effectively improving the accuracy of the measurement result.

[0018] Then, turn on the power, the phased parametric transmitting array in the ultrasonic transmitter and receiver 2 emits sound waves after signal amplification processing, and emits multiple high-frequency ultrasonic waves of different frequencies from the mud surface layer at the hole mouth. During the propagation in the mud, a difference frequency wave is formed due to the nonlinear effect of the medium, thereby synthesizing a parametric array sonar with a low-frequency pulse sound wave signal, which propagates in the mud, sediment, and rock and soil layers at the bottom of the pile; the receiver receives the sonar signal reflected by the interface of different density layers in the pile hole, including different reflected waves at the interface between mud and sediment, sediment and rock layer at the bottom of the pile, and below the rock layer at the bottom of the pile during the sound wave propagation process, and after preliminary signal processing such as amplification and filtering, , which is wirelessly transmitted to the data processing device by the communication interface module; the data processing device models the signal through the Gauss modulated pulse model, and uses the characteristics of the Gauss function to filter the signal. Since the Gauss function is a smooth and gradually decaying waveform in the time domain, this characteristic enables the algorithm to effectively suppress high-frequency noise and random noise in the signal, thereby improving the signal-to-noise ratio and extracting useful defect information; then, the processed data is converted into time-depth to obtain the distance from the mud surface to the interface of each layer, thereby obtaining the thickness of the pile bottom sediment. The time-depth conversion expression is: T1C1+T2-T1C2+T3-T2C3+...+Tn-Tn-1Cn=2L Where T1, T2, ...Tn are the time differences from the emission of sound waves to their reflection back to the receiver through the interface, and C1, C2, ...Cn are the sound speeds of sound waves in different media.

[0019] Embodiment 2: Embodiment 2 is different from Embodiment 1 in that Figure 4-6 As shown, an annular groove 18 is provided at the upper end of the main counterweight block 7, and an auxiliary counterweight block 19 is slidably mounted on the support shaft 6 between the baffle plate 8 and the main counterweight block 7. The top of the auxiliary counterweight block 19 is evenly provided with three vertical through holes along the circumference, and a suspension rod 20 is slidably installed in the through hole. Each lifting ear 9 is fixedly installed at the top of the corresponding suspension rod 20, and the bottom end of the suspension rod 20 is fixedly connected to the main counterweight block 7. A limit assembly is provided on the support shaft 6 below the main counterweight block 7 and the auxiliary counterweight block 19; a cavity is provided inside the support shaft 6, and a radially extending groove is provided on the support shaft 6 to communicate with the cavity. The slide groove, the limit assembly includes a pin 12 slidably installed in the slide groove, one end of the pin 12 extends into the cavity of the support shaft 6 and is fixedly installed with a sleeve 13, a sliding rod 14 is slidably sleeved in the sleeve 13, and the end of the sliding rod 14 away from the pin 12 is fixedly connected to the inner wall of the cavity, and a spring 15 is sleeved on the sliding rod 14 between the sleeve 13 and the inner wall of the cavity. The ends of the adjacent surfaces of the two pins 12 that are away from each other are both provided with inclined slopes, and the inclined surface on the pin 12 below the auxiliary counterweight block 19 is inclined upward, and the inclined surface on the pin 12 below the main counterweight block 7 is inclined downward.

[0020] Two limiting components are symmetrically arranged on both sides of the support shaft 6, and a transmission component is arranged between the two limiting components. The transmission component includes a rotating shaft 16 fixedly installed in the cavity of the support shaft 6 along the radial direction. A connecting plate 17 is rotatably installed on the rotating shaft 16. Notches are formed at both ends of the connecting plate 17, and sliders are slidably installed in the notches. The two sliders are respectively fixedly connected to the adjacent pins 12.

[0021] In the initial state, the secondary counterweight 19 is always stuck at the upper part of the support shaft 6. During the downward movement of the main counterweight 7, the centering rod 3 is driven to act through the pull rod 5. In addition, since the connecting block 1, the centering rod 3, and the connecting rod 4 between the connecting block 1 and the centering rod 3 together form a parallel four-bar linkage mechanism, when the pull rod 5 drives the centering rod 3 to act, multiple centering rods 3 expand radially outwards simultaneously. When multiple centering rods 3 come into contact with the inner wall of the pile hole at the same time, the main counterweight 7 will contact the pin 12 below it. While pressing the pin 12 into the cavity of the support shaft 6, it will also push the connecting plate 17 to rotate. After the connecting plate 17 rotates, it will drive the pin 12 below the secondary counterweight 19 to synchronously retract into the cavity of the support shaft 6. At this time, the secondary counterweight 19 suddenly drops and impacts the main counterweight 7. By using the impact of the secondary counterweight 19 on the main counterweight 7, multiple centering rods 3 are made to fit more closely to the inner wall of the pile hole.

[0022] Since the distance between the pin 12 below the main counterweight 7 and the top of the connecting block 1 is a, and the thickness of the main counterweight 7 is b, where a < b, when the main counterweight 7 moves down to the lowest point, the pin 12 below the main counterweight 7 will still contact the inner wall of the main counterweight 7. Therefore, after the detection is completed, only by lifting the main counterweight 7 again, the main counterweight 7 can be separated from the corresponding pin 12, and the two pins 12 can return to the initial state. Then, the main counterweight 7 and the secondary counterweight 19 are continued to be lifted upwards. Since the inclined surface of the pin 12 corresponding to the secondary counterweight 19 is inclined downwards, when the top of the secondary counterweight 19 contacts the corresponding pin 12, the pin 12 will be pressed into the cavity of the support shaft 6 again. Then, the main counterweight 7 continues to push the secondary counterweight 19 upwards until the secondary counterweight 19 contacts the baffle 8. In addition, since the depth of the annular groove 18 is c, the thickness of the secondary counterweight 19 is d, and the distance between the pin 12 below the secondary counterweight 19 and the bottom of the baffle 8 is e, where d < e < d + c, when the secondary counterweight 19 contacts the baffle 8, the pin 12 below the secondary counterweight 19 is located in the annular groove 18. At this time, the pin 12 pops out and gets stuck below the secondary counterweight 19, so that both counterweights return to the initial state.

[0023] The electrical devices described in this article are all electrically connected to an external power supply and are all existing devices. In addition, although the embodiments of the present invention have been shown and described, it can be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection, comprising an ultrasonic transmitter and receiver (2) and a crane (11), characterized in that: The self-centering mechanism also includes a connecting block (1) arranged vertically, a supporting shaft (6) being fixedly mounted concentrically on the top of the connecting block (1), a baffle (8) being fixedly mounted on the top of the supporting shaft (6), a main counterweight (7) being vertically slidably sleeved on the supporting shaft (6) between the connecting block (1) and the baffle (8), and the main counterweight (7) being suspended on a hook of a crane (11); a plurality of vertically arranged centering rods (3) being evenly arranged on the circumference of the connecting block (1), each of which is provided with a plurality of centering rods (3) arranged vertically. Two mutually parallel connecting rods (4) are arranged vertically at intervals between each centering rod (3) and the connecting block (1), and the two ends of the two connecting rods (4) are respectively hinged to the connecting block (1) and the centering rod (3); at least two horizontal rods (10) are evenly fixedly installed along the circumference of the upper part of the connecting block (1), and a pull rod (5) is hinged to the top of each centering rod (3), and the other end of the pull rod (5) is hinged to the main counterweight block (7); and the ultrasonic transmitter (2) is fixedly installed at the bottom of the connecting block (1).

2. The rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection according to claim 1 is characterized by: Three lifting ears (9) are evenly and fixedly installed on the top of the main counterweight block (7) along the circumference, and a hanging ring is hung on the hook of the crane (11). The three lifting ears (9) are connected to the hanging ring through steel wire ropes.

3. The rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection according to claim 2 is characterized by: The upper end of the main counterweight (7) is provided with an annular groove (18), and a secondary counterweight (19) is slidably mounted on the support shaft (6) between the baffle (8) and the main counterweight (7). The top of the secondary counterweight (19) is provided with three vertical through holes evenly arranged along the circumference, and a suspension rod (20) is slidably mounted in the through holes. Each suspension ear (9) is fixedly mounted on the top of a corresponding suspension rod (20), and the bottom end of the suspension rod (20) is fixedly connected to the main counterweight (7). Limiting components are provided on the support shaft (6) below the main counterweight (7) and the secondary counterweight (19).

4. The rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection according to claim 3 is characterized by: The support shaft (6) has a cavity formed inside, and a slide groove connected to the cavity is formed radially on the support shaft (6). The limit assembly comprises a latch (12) slidably mounted in the slide groove, one end of the latch (12) extends into the cavity of the support shaft (6) and is fixedly mounted with a sleeve (13), a slide rod (14) is slidably mounted inside the sleeve (13), one end of the slide rod (14) away from the latch (12) is fixedly connected to the inner wall of the cavity, and a spring (15) is mounted on the slide rod (14) between the sleeve (13) and the inner wall of the cavity.

5. The rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection according to claim 4 is characterized by: The two limit assemblies are symmetrically arranged on both sides of the support shaft (6), and a transmission assembly is arranged between the two limit assemblies, the transmission assembly comprising a rotating shaft (16) fixedly installed in the cavity of the support shaft (6) along the radial direction, a connecting plate (17) rotatably installed on the rotating shaft (16), notches are provided at both ends of the connecting plate (17), sliders are slidably installed in the notches, and the two sliders are respectively fixedly connected to the latch pins (12) on the adjacent sides.

6. The rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection according to claim 3 is characterized by: The distance between the latch pin (12) below the main counterweight block (7) and the top of the connecting block (1) is a, and the thickness of the main counterweight block (7) is b, wherein a <b。 7. The rock-embedded pile sediment detection device based on high-resolution parametric array sonar detection according to claim 6 is characterized by: The depth of the annular groove (18) is c, the thickness of the auxiliary counterweight block (19) is d, and the distance between the latch pin (12) below the auxiliary counterweight block (19) and the bottom of the baffle (8) is e, wherein d <e<d+c。

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