Multi-channel pile foundation detection equipment based on side hole transmission wave method

Abstract

The utility model provides multichannel pile foundation detection equipment based on a side hole transmission wave method, which belongs to the technical field of building detection and comprises a transport case, partition plates are mounted in an inner cavity of the transport case, and the inner cavity of the transport case is divided into a first cavity, a second cavity and a third cavity by the partition plates. The bottom of one side of the transport box is provided with a moving mechanism used for moving the transport box so as to facilitate transfer, and the first cavity is internally provided with a seismic wave source assembly used for detecting the pile foundation. The utility model has the beneficial effects that a pile foundation can be hammered through the seismic wave source assembly to generate vibration so as to form mechanical waves, and then the generated mechanical waves can be collected and analyzed through the composite multi-channel collection assembly and the data analysis assembly, so that data collection and analysis are integrated; the length of the pile foundation is detected in real time with high precision and high efficiency, reliable data is provided for follow-up engineering construction safety, and engineering quality and safety are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of building detection, in particular to a multi-channel pile foundation detection device based on a side-hole transmission wave method. Background Art

[0002] Among the various foundation forms currently used in engineering construction, pile foundation is widely used in various projects such as industrial and civil buildings, highway and railway bridges, water conservancy and hydropower, ports and oceans due to its large bearing capacity, high safety performance and strong applicability. Pile foundation is an underground hidden project. Its structural characteristics and the state of the surrounding and underlying rock and soil are difficult to observe non-destructively, so it is difficult to find quality problems. Once a hidden danger occurs, it is also very challenging for subsequent disposal work. The quality of the pile foundation project will directly affect the structural safety of the structures constructed by the entire project. Therefore, during the construction process, it is very important to regularly inspect the quality of the pile body.

[0003] Traditional pile length detection technologies such as low-strain method, high-strain method, core drilling method, etc., which detect the length of existing pile foundations that are not exposed above the pile top, will be affected by the structural components above the pile top, which limits the detection space and makes the applicability weak. By using the side-hole transmission wave method, the integrity and pile length of the foundation piles under the existing buildings can be effectively detected, which can solve the hidden dangers of the project and ensure safe construction.

[0004] The single-channel acquisition component used in the conventional side-hole transmission method device requires multiple lifting of the detector and multiple excitations to collect complete detection data. The manual lifting process is prone to human errors and has low operating efficiency. At the same time, it needs to be moved multiple times to complete the detection during use, which leads to large human errors and a long data collection time, reducing work efficiency. Utility Model Content

[0005] In view of this, the utility model aims to propose a multi-channel pile foundation detection device based on the side-hole transmission wave method, in order to solve at least one of the above-mentioned technical problems.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A multi-channel pile foundation detection device based on a side-hole transmission wave method comprises a transport box, an inner cavity of the transport box is provided with a partition, the inner cavity of the transport box is divided into a first cavity, a second cavity and a third cavity by the partition, and a moving mechanism for moving the transport box for easy transfer is provided at the bottom of one side of the transport box;

[0008] The first cavity is provided with a seismic wave source assembly for detecting pile foundations, the second cavity is provided with a composite multi-channel acquisition assembly for acquiring data, and the third cavity is provided with a data analysis assembly for analyzing the acquired data.

[0009] Furthermore, the moving mechanism includes a moving rod, the lower end of which is connected to the bottom of one side of the transport box, and fixed boxes are installed above one side of the transport box and on the front and rear sides of the moving rod. The inner sides of the fixed boxes are provided with grooves, and the inner sliding connection of the grooves is connected to limit rods. The inner ends of the limit rods respectively pass through the grooves and extend to the outside of the grooves to engage with the front and rear sides of the moving rod. The inside of the grooves is connected to return springs, and the inner ends of the return springs are respectively connected to the outer ends of the moving rods.

[0010] Furthermore, the seismic wave source assembly includes a hammer source and a trigger, and one side of the hammer source is connected to one end of the trigger.

[0011] Furthermore, the composite multi-channel acquisition component includes a hydrophone chain, a multi-channel seismograph, a laptop computer and a battery. The hydrophone chain is electrically connected to the multi-channel seismograph, the multi-channel seismograph is electrically connected to the other end of the trigger and the laptop computer through a data transmission line, and the battery is electrically connected to the multi-channel seismograph and the laptop computer.

[0012] Furthermore, the inner end of the movable rod is spherical, and limiting grooves are provided at the front and rear ends of the movable rod and at corresponding positions of the movable rod, and the inner ends of the movable rod are respectively engaged with the limiting grooves.

[0013] Furthermore, positioning blocks are equidistantly installed on the surface of the limiting rod, and a positioning groove is provided inside the groove at the positioning position of the positioning block, and the surface of the positioning block is slidably connected to the inner cavity of the positioning groove.

[0014] Furthermore, a sealing cover is connected to the top of the transport box, and the sealing cover is snap-connected to the transport box via a buckle.

[0015] Compared with the prior art, the multi-channel pile foundation detection device based on the side-hole transmission wave method described in the utility model has the following beneficial effects:

[0016] Through the setting of the seismic wave source component, the composite multi-channel acquisition component and the data analysis component, the seismic wave source component can be used to hammer the pile foundation to generate vibration, thereby forming a mechanical wave, and then the composite multi-channel acquisition component and the data analysis component can be used to collect and analyze the generated mechanical waves, integrating data acquisition and analysis, and detecting the length of the pile foundation in real time with high precision and high efficiency, providing reliable data for the safety of subsequent engineering construction, and ensuring the quality and safety of the project;

[0017] A multi-channel pile foundation high-precision detection equipment based on the side-hole transmission wave method can obtain complete detection data with a single deployment and single excitation, with small human error and high operation efficiency; through the setting of a transportation box and a moving mechanism, when in use, the transportation box can store seismic wave source components, composite multi-channel acquisition components and data analysis components for easy transfer, and the transportation box can be easily moved through the moving mechanism, thereby improving the convenience of moving the transportation box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the pile foundation detection equipment according to an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the first cavity structure according to an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the mobile mechanism according to an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the seismic wave source assembly according to an embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the composite multi-channel acquisition component described in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Transport box; 2. Partition; 3. First cavity; 4. Second cavity; 5. Third cavity; 6. Moving mechanism; 7. Seismic wave source assembly; 8. Composite multi-channel acquisition assembly; 61. Moving pull rod; 62. Fixed box; 63. Limit rod; 64. Reset spring; 71. Hammer source; 72. Trigger; 81. Hydrophone chain; 82. Multi-channel seismograph; 83. Laptop computer; 84. Battery; 10. Sealing cover. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] like Figure 1-5 As shown: a multi-channel pile foundation detection device based on the side-hole transmission wave method, including a transport box 1, the inner cavity of the transport box 1 is installed with a partition 2, the inner cavity of the transport box 1 is divided into a first cavity 3, a second cavity 4 and a second cavity 4 by the partition 2, and a moving mechanism 6 for moving the transport box 1 for easy transfer is arranged at the bottom of one side of the transport box 1. Through the arrangement of the transport box 1 and the moving mechanism 6, when in use, the transport box 1 can store the seismic wave source component 7, the composite multi-channel acquisition component 8 and the data analysis component for easy transfer, and the transport box 1 is easily moved by the moving mechanism 6, thereby improving the convenience of moving the transport box 1;

[0031] The first cavity 3 is provided with a seismic wave source component 7 for detecting the pile foundation, the second cavity 4 is provided with a composite multi-channel acquisition component 8 for acquiring data, and the third cavity 5 is provided with a data analysis component for analyzing the acquired data. Through the setting of the seismic wave source component 7, the composite multi-channel acquisition component 8 and the data analysis component, the pile foundation can be hammered by the seismic wave source component 7 to generate vibrations to form mechanical waves, and then the generated mechanical waves can be acquired and analyzed by the composite multi-channel acquisition component 8 and the data analysis component, integrating data acquisition and analysis, and detecting the length of the pile foundation in real time with high precision and high efficiency, providing reliable data for the safety of subsequent engineering construction, and ensuring the quality and safety of the project.

[0032] The moving mechanism 6 includes a moving rod 61, the lower end of which intersects with the bottom of one side of the transport box 1, and a fixing box 62 is installed above one side of the transport box 1 and on both the front and rear sides of the moving rod 61. The inner side of the fixing box 62 is provided with a groove, and the inner side of the groove is slidably connected to a limit rod 63. The inner ends of the limit rod 63 respectively penetrate the groove and extend to the outside of the groove to engage with the front and rear sides of the moving rod 61. The inner side of the groove is connected with a return spring 64, and the inner ends of the return spring 64 are respectively connected to the outer ends of the moving rod 61. When in use, pull the moving rod 61 and the moving rod 61 moves out from between the fixed boxes 62. At this time, the transport box 1 can be moved by pulling the moving rod 61. When not in use, push the moving rod 61 into between the fixed boxes 62. At this time, the moving rod 61 will squeeze the limit rod 63 to make the limit rod 63 retract into the groove and compress the reset spring 64. When the limit grooves on both sides of the moving rod 61 are aligned with the limit rod 63, under the action of the reset spring 64, the two ends of the limit rod 63 are inserted into the limit grooves and engaged with the limit grooves, so that the moving rod 61 can be fixed.

[0033] The seismic wave source assembly 7 includes a hammer source 71 and a trigger 72. One side of the hammer source 71 is connected to one end of the trigger 72. When the hammer source 71 collides with the pile foundation, mechanical vibration is generated. The mechanical vibration propagates in the medium to form mechanical waves. The propagation speed of mechanical waves in different media is different. This feature can be used to infer the length of the pile foundation through the difference in the propagation speed of mechanical waves in the pile foundation and the surrounding soil.

[0034] The composite multi-channel acquisition assembly 8 includes a hydrophone chain 81, a multi-channel seismograph 82, a laptop computer 83 and a battery 84. The hydrophone chain 81 is electrically connected to the multi-channel seismograph 82. The multi-channel seismograph 82 is electrically connected to the other end of the trigger 72 and the laptop computer 83 through a data transmission line. The battery 84 is electrically connected to the multi-channel seismograph 82 and the laptop computer 83 respectively.

[0035] Since the hydrophone chain 81 is a chain-like hydrophone string with variable channel spacing composed of multiple hydrophones connected by cables, it is easy to detect. The multi-channel seismograph 82 is an instrument that supports simultaneous data acquisition of forty-eight or more detectors. At the same time, seismic data acquisition software is installed in the laptop computer 83. Parameters can be collected through the data acquisition software. At the same time, the number of switches and channel spacing of the hydrophone chain 81 can be controlled by the data acquisition software, which is convenient for data acquisition. The battery 84 can power the multi-channel seismograph 82 and the laptop computer 83.

[0036] The data analysis component includes a data import module, a first arrival wave picking module, a manual fitting module and a data saving module. The data analysis component is written in MATLAB language to form an independent professional data processing and analysis software. The data import module decodes the collected seismic wave segy data and imports the data into the data analysis component, inputs the magnification scale deep part and the magnification scale shallow part, adjusts the data gain, and is convenient for observing the first arrival position to form a seismic wave image. The first arrival wave picking module is a human-computer interaction extraction method, that is, human-computer interaction extraction is performed according to the first arrival wave position of the seismic wave. After the extraction is completed, a time-depth curve image is directly generated. The manual fitting module determines two straight lines according to the time-depth curve image and the slope of the curve by linear fitting. The intersection position corresponds to the depth of the pile bottom. The depth information does not need to be read manually, and the software can automatically generate the depth information. The data saving module can save the seismic wave image in the data import module and the time-depth curve data and image in the first arrival wave picking module.

[0037] The inner end of the moving rod 61 is spherical, and limiting grooves are provided at the front and rear ends of the moving rod 61 and at the corresponding positions of the moving rod 61. The inner ends of the moving rod 61 are respectively engaged with the limiting grooves, which is convenient for fixing the moving rod 61 and easy to use. Positioning blocks are equidistantly installed on the surface of the limiting rod 63, and positioning grooves are provided inside the groove and at the positioning position of the positioning block. The surface of the positioning block is slidably connected to the inner cavity of the positioning groove, which can limit the limiting rod 63 and prevent the limiting rod 63 from moving out of the groove. A sealing cover 10 is connected to the top of the transport box 1, and the sealing cover 10 is engaged with the transport box 1 through a buckle, which is convenient to use.

[0038] Working principle:

[0039] S1. The side hole transmission method is suitable for detecting the pile length of foundation piles with hidden pile heads, pile bodies that cannot be excavated, and piles that can be drilled near the piles. Clean the top and surrounding of the pile head or the cap to expose the surface of the pile head or the cap; and drill detection holes within a radius of 1.5m with the pile body as the center to place the hydrophone chain 81;

[0040] S2. After the construction of the detection hole is completed, a hydrophone chain 81 is placed vertically in the hole and connected to the composite multi-channel acquisition assembly 8;

[0041] S3, fix the trigger 72 20 cm above the hammer head of the hammer, and wrap it with tape to ensure that the trigger 72 is tightly and firmly connected to the hammer;

[0042] S4, using a data transmission line to connect the trigger 72 to the composite multi-channel acquisition component 8;

[0043] S5, using a data transmission line to connect the composite multi-channel acquisition component 8 to the notebook computer 83;

[0044] S6, connecting the composite multi-channel acquisition component 8 to the 12V battery 84;

[0045] S7, turn on the composite multi-channel acquisition component 8 and connect it to the laptop computer 83, open the data acquisition software, set the acquisition parameters, and perform an instrument consistency check;

[0046] S8, using a hammer to hit the surface of the pile foundation to excite seismic waves, using the composite multi-channel acquisition component 8 to record the seismic waves, after the recording is completed, the data acquisition software interface displays the single shot record, checks the data for missing channels, signal-to-noise ratio and other information, and saves it after confirming that it is correct;

[0047] S9, importing the collected data file into the data analysis component, inputting the magnification scale deep part and the magnification scale shallow part, adjusting the data gain, facilitating the observation of the first arrival position, and forming a seismic wave image;

[0048] S10, selecting a method of picking up direct waves to perform first arrival picking, and obtaining a time-depth curve after the picking is completed;

[0049] S11. According to the time-depth curve image and the slope of the curve, two straight lines are determined by linear fitting. The intersection position corresponds to the depth of the pile bottom. The depth information does not need to be read manually, and the software can automatically generate the depth information.

[0050] S12, saving the time-depth curve image, the fitting straight line, and the pile bottom depth information.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-channel pile foundation detection device based on a side-hole transmission wave method, comprising a transport box (1), characterized in that: The inner cavity of the transport box (1) is provided with a partition (2), and the inner cavity of the transport box (1) is divided into a first cavity (3), a second cavity (4) and a third cavity (5) by the partition (2); a moving mechanism (6) for moving the transport box (1) for facilitating transfer is provided at the bottom of one side of the transport box (1); The first cavity (3) is provided with a seismic wave source component (7) for detecting pile foundations, the second cavity (4) is provided with a composite multi-channel acquisition component (8) for acquiring data, and the third cavity (5) is provided with a data analysis component for analyzing the acquired data.

2. The multi-channel pile foundation detection device based on the side-hole transmission wave method according to claim 1 is characterized in that: The moving mechanism (6) comprises a moving rod (61), the lower end of which is connected to the bottom of one side of the transport box (1), and a fixed box (62) is installed above one side of the transport box (1) and on both the front and rear sides of the moving rod (61), and the inner side of the fixed box (62) is provided with a groove, and the inner side of the groove is slidably connected to a limit rod (63), and the inner ends of the limit rod (63) respectively penetrate the groove and extend to the outside of the groove to engage with the front and rear sides of the moving rod (61), and the inner side of the groove is connected to a return spring (64), and the inner ends of the return spring (64) are respectively connected to the outer ends of the moving rod (61).

3. The multi-channel pile foundation detection equipment based on the side-hole transmission wave method according to claim 1 is characterized in that: The seismic wave source assembly (7) comprises a hammer source (71) and a trigger (72), and one side of the hammer source (71) is connected to one end of the trigger (72).

4. The multi-channel pile foundation detection equipment based on the side-hole transmission wave method according to claim 1 is characterized in that: The composite multi-channel acquisition assembly (8) comprises a hydrophone chain (81), a multi-channel seismograph (82), a laptop computer (83) and a storage battery (84); the hydrophone chain (81) is electrically connected to the multi-channel seismograph (82); the multi-channel seismograph (82) is electrically connected to the other end of the trigger (72) and the laptop computer (83) via a data transmission line; and the storage battery (84) is electrically connected to the multi-channel seismograph (82) and the laptop computer (83) respectively.

5. The multi-channel pile foundation detection equipment based on the side-hole transmission wave method according to claim 2 is characterized in that: The inner end of the movable rod (61) is spherical, and limiting grooves are provided at the front and rear ends of the movable rod (61) and at corresponding positions of the movable rod (61), and the inner ends of the movable rod (61) are respectively engaged with the limiting grooves.

6. The multi-channel pile foundation detection equipment based on the side-hole transmission wave method according to claim 2 is characterized by: Positioning blocks are equidistantly mounted on the surface of the limiting rod (63); a positioning groove is provided inside the groove and at the location of the positioning block; the surface of the positioning block is slidably connected to the inner cavity of the positioning groove.

7. The multi-channel pile foundation detection equipment based on the side-hole transmission wave method according to claim 1 is characterized in that: A sealing cover (10) is connected to the top of the transport box (1), and the sealing cover (10) is snap-fitted to the transport box (1) via a buckle.

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