Diameter measuring device and detection method thereof

Abstract

The invention belongs to the technical field of building construction, and discloses a diameter measuring device and a detection method thereof.The diameter measuring device comprises a shell and a measuring assembly, the shell is detachably connected to the bottom of a jet grouting pile drill bit, and the measuring assembly comprises a measuring rod; a pressure sensor; a driving device; a displacement sensor; and a calculation unit. The diameter measuring device is installed at the bottom of the jet grouting pile drill bit, pile diameter detection can be carried out in the construction process, and it is not needed to wait for solidification of a pile body; technical reference can be provided for follow-up construction by detecting the pile diameter in the construction process, and workers can conveniently adjust construction parameters, so that it is ensured that the jet grouting pile meets the design requirement; automatic detection is achieved through cooperation of the pressure sensor, the displacement sensor, the calculation unit and other structures, interference of human factors is reduced, and the detection result is more accurate.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a diameter measuring device and its testing method. Background Technology

[0002] Currently, the main method for measuring the diameter of jet grouting piles is core drilling. However, core drilling can only be performed after the pile body has reached a certain strength following a period of construction. Therefore, core drilling has a lag effect in verifying the pile diameter, which is not conducive to dynamic adjustment during construction. Furthermore, accurate pile diameter data requires verification through multiple core holes, which can cause significant damage to the reinforced body. Therefore, we propose a diameter measuring device and its detection method to solve the above problems. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a diameter measuring device and its detection method, which solves the problems that traditional diameter measuring methods are not conducive to dynamic adjustment during construction and can damage the reinforced body.

[0004] This invention is achieved through the following solution: a diameter measuring device, comprising a housing and a measuring component, wherein the housing is detachably connected to the bottom of a jet grouting drill bit, and the measuring component comprises: The measuring rod is hinged at one end to the outside of the housing; A pressure sensor, fixedly connected to the other end of the measuring rod, is used to send a feedback signal when it comes into contact with the edge of the jet grouting pile; The driving device includes a hydraulic jack, a rack, and a gear ring. The hydraulic jack is fixed to the housing. The gear ring is fixed to one end of the measuring rod that is hinged to the housing. The rack is fixedly connected to the output end of the hydraulic jack and meshes with the gear ring. The hydraulic jack drives the rack to move, which in turn drives the gear ring to rotate the measuring rod, so that the pressure sensor comes into contact with the edge of the jet grouting pile. A displacement sensor is used to measure the distance the output end of the hydraulic jack moves upon receiving the feedback signal; and The calculation unit is equipped with calculation logic for calculating the pile diameter. The calculation unit is connected to a displacement sensor to obtain the distance moved by the output end of the hydraulic jack, and substitutes the distance value into the calculation logic to calculate the pile diameter.

[0005] A further improvement of the diameter measuring device of the present invention is that the number of measuring components is two, and the two measuring components are symmetrically arranged along the centerline of the housing.

[0006] A further improvement of the diameter measuring device of the present invention is that the calculation logic includes a calculation formula: in, The radius of the pile; This is the distance from the pressure sensor to the center of the toothed ring. The distance the output end of the hydraulic jack moves; Where is the radius of the toothed ring; This is the distance from the center of the gear ring to the centerline of the housing.

[0007] A further improvement of the diameter measuring device of the present invention is that each of the measuring components further includes a receiving cavity opened outside the housing for accommodating the corresponding measuring rod.

[0008] A further improvement of the diameter measuring device of the present invention is that the housing is provided with two sliding grooves that are respectively connected to two receiving cavities, and the two sliding grooves are arranged vertically. The rack can slide along the longitudinal direction of the corresponding sliding groove under the drive of the hydraulic jack.

[0009] A further improvement of the diameter measuring device of the present invention is that the pressure sensor is a three-dimensional force sensor.

[0010] A method for detecting a diameter measuring device includes the following steps: Provide the diameter measuring device as described above; The diameter measuring device is installed at the bottom of the jet grouting drill bit and lowered along with the drill bit to the set construction depth. After the jet grouting pile drill bit is started and the machine is stopped at the set height, the hydraulic jack is started to drive the rack to move, which in turn drives the gear ring to rotate the measuring rod. When the pressure sensor sends a feedback signal, the hydraulic jack is stopped to achieve diameter measurement.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention installs a diameter measuring device at the bottom of the jet grouting pile drill bit, allowing for pile diameter detection during construction without waiting for the pile to solidify. Furthermore, the diameter measurement during construction provides technical reference for subsequent work, facilitating adjustments to construction parameters to ensure the jet grouting pile meets design requirements. The invention also achieves automated detection through the integration of pressure sensors, displacement sensors, and a calculation unit, reducing human error and resulting in more accurate detection results. Attached Figure Description

[0012] Figure 1 A schematic diagram of the overall structure of the present invention is shown.

[0013] Figure 2 The present invention is shown. Figure 1 Schematic diagram of the cross-sectional structure of AA.

[0014] Figure 3 A schematic diagram of the rack region connection structure of the present invention is shown.

[0015] Figure 4The diagram shows a schematic of the parameters in the calculation formula of the present invention when the pressure sensor is attached to the edge of the jet grouting pile.

[0016] Figure 5 A schematic diagram of the detection steps of the present invention is shown.

[0017] In the diagram: 1. Jet grouting drill bit; 2. Shell; 3. Receiving cavity; 4. Measuring rod; 5. Pressure sensor; 6. Gear ring; 7. Gear rack; 8. Slide groove; 9. Hydraulic jack; 10. Displacement sensor; 11. Diameter measuring device. Detailed Implementation

[0018] To address the problems of traditional diameter measuring methods being unsuitable for dynamic adjustments during construction and causing damage to reinforced structures, this invention provides a diameter measuring device and its testing method. The following detailed description, in conjunction with the accompanying drawings, further illustrates this diameter measuring device and its testing method.

[0019] See Figures 1-5 As shown, a diameter measuring device 11 includes a housing 2 and a measuring assembly. The housing 2 is detachably connected to the bottom of the jet grouting drill bit 1. The measuring assembly includes: Measuring rod 4, one end of which is hinged to the outside of housing 2; Pressure sensor 5 is fixedly connected to the other end of measuring rod 4 and is used to send a feedback signal when it comes into contact with the edge of the jet grouting pile; The driving device includes a hydraulic jack 9, a rack 7, and a gear ring 6. The hydraulic jack 9 is fixed on the housing 2. The gear ring 6 is fixed to the end of the measuring rod 4 that is hinged to the housing 2. The rack 7 is fixedly connected to the output end of the hydraulic jack 9 and meshes with the gear ring 6. The hydraulic jack 9 drives the rack 7 to move, which in turn drives the gear ring 6 to rotate the measuring rod 4, so that the pressure sensor 5 is pressed against the edge of the jet grouting pile. Displacement sensor 10 is used to measure the distance moved by the output end of hydraulic jack 9 upon receiving a feedback signal; and The calculation unit is equipped with calculation logic for calculating the pile diameter. The calculation unit is connected to the displacement sensor 10 to obtain the distance moved by the output end of the hydraulic jack 9, and substitutes the distance value into the calculation logic to calculate the pile diameter.

[0020] By installing the diameter measuring device 11 at the bottom of the jet grouting pile drill bit 1, the pile diameter can be detected during construction without waiting for the pile body to solidify. The detection of the pile diameter during construction can also provide technical reference for subsequent construction, making it convenient for workers to adjust the construction parameters to ensure that the jet grouting pile meets the design requirements. Moreover, the automatic detection is achieved through the cooperation of pressure sensor 5, displacement sensor 10, calculation unit and other structures, which reduces the interference of human factors and makes the detection results more accurate.

[0021] Among them, see Figure 2 As shown, there are two measuring components, and the two measuring components are symmetrically arranged along the centerline of the housing 2.

[0022] By adopting the above design and using two measuring components to start simultaneously, the radii on both sides of the center of the pile can be measured, which is the diameter of the pile.

[0023] The calculation logic includes the calculation formula: in, The radius of the pile; The distance from the center of pressure sensor 5 to the center of toothed ring 6; The distance the output end of the hydraulic jack 9 moves; The radius of the toothed ring is 6. It is the distance from the center of the toothed ring 6 to the centerline of the housing 2.

[0024] By using the above calculation formula, the pile radius can be calculated quickly and conveniently by simply detecting the distance the output end of the hydraulic jack 9 moves as measured by the displacement sensor 10 when the pressure sensor 5 is pressed against the edge of the jet grouting pile.

[0025] Among them, see Figure 2 As shown, each measuring component also includes a receiving cavity 3 located outside the housing 2 and for accommodating the corresponding measuring rod 4.

[0026] By adopting the above design, the design of the receiving cavity 3 can provide storage space for the measuring rod 4. When the measuring rod 4 is retracted into the receiving cavity 3, it does not protrude from the housing 2, ensuring convenient insertion and removal during construction.

[0027] Among them, see Figure 3 As shown, the housing 2 has two sliding grooves 8 that are respectively connected to the two receiving cavities 3, and the two sliding grooves 8 are arranged vertically. The rack 7 can slide along the length of the corresponding sliding groove 8 under the drive of the hydraulic oil top 9.

[0028] By adopting the above design, the rack 7 can be stably slidable by using the groove 8 to limit the rack 7.

[0029] Among them, pressure sensor 5 is a three-dimensional force sensor.

[0030] By adopting the above design, the diameter measuring device 11 has the characteristics of high precision, high stability and high reliability, and can measure values ​​in multiple azimuths to obtain accurate pile range.

[0031] A detection method for a diameter measuring device 11 includes the following steps: Provide the diameter measuring device 11 as described above; The diameter measuring device 11 is installed at the bottom of the jet grouting drill bit 1 and lowered to the set construction depth along with the jet grouting drill bit 1. After the jet grouting pile drill bit 1 is started and constructed to the set height (which is greater than the overall length of the diameter measuring device 11 of this application), the machine is stopped. Then, the hydraulic jack 9 is started to drive the rack 7 to move, which in turn drives the toothed ring 6 to rotate the measuring rod 4. When the pressure sensor 5 sends a feedback signal (if the three-dimensional force sensor reading on the display changes continuously and slightly, it can be determined that the three-dimensional force sensor is within the range of jet grouting destruction, and the pressure is continued to be applied in jogs; if the sensor reading suddenly increases to the set value, it can be determined that the three-dimensional force sensor is in contact with the edge of the jet grouting pile, and only then will a feedback signal be sent), the hydraulic jack 9 is controlled to stop to achieve diameter measurement. After the diameter measurement is completed, the hydraulic jack 9 is retracted, thereby controlling the measuring rod 4 to retract into the receiving cavity 3, and then the jet grouting drill bit 1 is started to continue construction.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A caliper device, characterized in that, The device comprises a shell and a measuring assembly, the shell is detachably connected to the bottom of a rotary jetting pile drill head, and the measuring assembly comprises: a measuring rod hingedly connected to the outside of the shell at one end; a pressure sensor fixedly connected to the other end of the measuring rod for sending a feedback signal when abutting against the edge of the rotary jetting pile; a driving device, the driving device comprises a hydraulic oil jack, a rack and a pinion ring, the hydraulic oil jack is fixed on the shell, the pinion ring is fixed to the end of the measuring rod hingedly connected to the shell, the rack is fixedly connected to the output end of the hydraulic oil jack and engaged with the pinion ring, the rack is driven to move by the hydraulic oil jack, and in turn the pinion ring drives the measuring rod to overturn, so that the pressure sensor abuts against the edge of the rotary jetting pile; a displacement sensor for measuring the distance of the output end of the hydraulic oil jack moving when the feedback signal is received; and a calculation unit, the calculation unit is provided with calculation logic for calculating the pile diameter, the calculation unit is connected with the displacement sensor for obtaining the distance of the output end of the hydraulic oil jack moving and substituting the distance value into the calculation logic to calculate the pile diameter.

2. The calliper device of claim 1, wherein, The number of the measuring assemblies is two, and the two measuring assemblies are symmetrically arranged along the center line of the shell.

3. The calliper device of claim 2, wherein, The calculation logic comprises a calculation formula: wherein, R is the radius of the pile body; L is the distance from the pressure sensor to the center of the gear ring; D is the distance of the output end movement of the hydraulic oil top; R is the radius of the gear ring; L is the distance from the center of the gear ring to the centerline of the housing.

4. The calliper device of claim 2, wherein Each of the measuring assemblies further comprises a containing cavity opened on the outside of the shell and accommodating the corresponding measuring rod.

5. The calliper device of claim 4, wherein, The shell is provided with two sliding grooves respectively communicating with the two containing cavities, and the two sliding grooves are vertically arranged, and the rack can slide along the length direction of the corresponding sliding groove under the driving of the hydraulic oil jack.

6. The calliper device of claim 1, wherein, The pressure sensor is a three-dimensional force sensor.

7. A detection method of a caliper device, characterized by, The method comprises the following steps: providing the device as claimed in claim 1; installing the device on the bottom of the rotary jetting pile drill head and following the rotary jetting pile drill head to lower to the set construction depth; starting the rotary jetting pile drill head to stop at the set height, and then starting the hydraulic oil jack to drive the rack to move, and in turn the pinion ring drives the measuring rod to overturn, when the pressure sensor sends the feedback signal, stopping the hydraulic oil jack to realize the diameter measurement.

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