CN115808157A - Foundation pile core drilling perpendicularity detection device applying laser and application method thereof - Google Patents
Foundation pile core drilling perpendicularity detection device applying laser and application method thereof Download PDFInfo
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- CN115808157A CN115808157A CN202211645933.7A CN202211645933A CN115808157A CN 115808157 A CN115808157 A CN 115808157A CN 202211645933 A CN202211645933 A CN 202211645933A CN 115808157 A CN115808157 A CN 115808157A
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Abstract
The invention relates to the field of foundation pile detection, in particular to a foundation pile core drilling perpendicularity detection device and a using method thereof. The utility model provides an use laser's foundation pile bored core hole straightness detection device that hangs down, includes the detection device body, and the detection device body includes first A-frame, second A-frame, is equipped with the capstan winch on the first A-frame, is equipped with the leveling support on the second A-frame, is equipped with laser range finder on the leveling support, and laser range finder's below is equipped with and shows receiving cylinder, links to each other through the connecting rope between capstan winch and the demonstration receiving cylinder, and the upper portion that shows receiving cylinder is equipped with laser receiving target dish. The invention enables the movement direction and the deflection degree of the drill core hole to be visualized, and can play a key role in judging the result, solving disputes and preventing engineering quality accidents; the defect that the traditional inclination measurement method depends on data formed by the posture of the probe rod to judge and the testability is not strong due to excessive influence factors of the posture of the probe rod is overcome, the test effect is improved, and the relative error influence is small.
Description
Technical Field
The invention relates to the field of foundation pile detection, in particular to a foundation pile drill core hole verticality detection device and a using method thereof.
Background
The core drilling method detection is an important means for detecting the integrity of the foundation pile, but in the core drilling detection process, besides the common drill bit drills out the pile body, especially in aeolian uneven rock strata such as phyllite, the construction of the bored pile easily causes the inclination of the foundation pile, the accident frequently occurs, and disputes are easily caused by the inclination of the pile body or the inclination of the core drilling hole due to the construction reason; if a large amount of pile body inclinations can cause serious quality accidents, so when the drilling method is used for detecting and drilling out the pile body, the verticality of a drilling hole needs to be judged by adopting a corresponding technology, and whether the verticality is caused by the inclination of the drilling hole, or the inclination of the pile body and the drilling hole is caused simultaneously is judged.
The existing method for detecting the perpendicularity of the drill core hole is realized by adopting a gyroscope high-precision inclinometer, the high-precision inclinometer depends on the posture of a probe rod for detecting the perpendicularity of the drill hole and must ensure that the posture of the probe rod is parallel to the drill hole, the parallel detection is realized by adopting a heavy hammer principle or a support in the prior art, but the motion track of the probe rod and the drill hole track are difficult to ensure to be completely parallel under the influence of the traction of the probe rod or the structural rigidity of the support in different directions, so that the tested data can not be proved to represent the track of the drill hole, the posture of the probe rod of the inclinometer directly determines the testing accuracy, but the posture of the probe rod can not be accurately controlled and can not directly reflect the drill hole track, the proving of the perpendicularity of the drill core hole by only testing data has no convincidences, and disputes and potential safety hazards can not be solved.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The invention aims to provide a device for detecting the perpendicularity of a drill core hole of a foundation pile by using laser and a using method thereof, so as to solve at least one technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
the device for detecting the verticality of the drilled core hole of the foundation pile by using the laser comprises a detection device body and is characterized in that the detection device body comprises a first triangular support and a second triangular support, wherein a winch is arranged on the first triangular support, a leveling support is arranged on the second triangular support, and the winch is arranged above the leveling support;
the leveling support is provided with a laser range finder, a display receiving cylinder used for placing a drill core hole is arranged below the laser range finder, and the winch is connected with the display receiving cylinder through a connecting rope;
the upper part of the display receiving cylinder is provided with a laser receiving target disc made of a light-transmitting material, the laser irradiation direction of the laser range finder faces the laser receiving target disc, a camera is arranged in the display receiving cylinder, the shooting direction of the camera faces the laser receiving target disc, and the camera is connected with a display device arranged outside the drill core hole;
and a pulley used for propping against the inner wall of the core drilling hole is arranged on the side wall of the display receiving cylinder.
The transversal ring form of personally submitting of leveling support, be equipped with the slide rail that is horizontal setting on the leveling support, and then the slide rail with form the opening that is used for passing the connection rope between the inner wall of leveling support, the slide rail includes the slider, laser range finder sets up on the slider.
The leveling support includes support ring, base, the support ring with the cross section of base all is the ring form, the support ring sets up on the base, the slide rail sets up on the support ring, be equipped with at least three bolt hole on the support ring, at least three the bolt hole is followed angle such as the circumferencial direction of support ring arranges, the downthehole wrong bolt that has connect of bolt, the lower part of bolt supports the base.
An electronic level gauge is arranged in the laser range finder.
The cross section of the laser receiving target disc is circular, a first cross-shaped reference line is arranged on the laser receiving target disc, and the center point of the first reference line is located at the center of the laser receiving target disc. The laser receiving target disc is provided with at least three second reference lines which are circular, the diameters of the at least three second reference lines are gradually increased and are arranged in concentric circles, and the circle center of the second reference line coincides with the center point of the first reference line.
The side wall of the display receiving cylinder is provided with two groups of pulley blocks, the two groups of pulley blocks are vertically arranged on the side wall of the display receiving cylinder, each pulley block comprises at least three pulleys, and the at least three pulleys are arranged in an equal angle mode along the circumferential direction of the display receiving cylinder.
The display receiving cylinder is characterized in that a pulley mounting groove is formed in the side wall of the display receiving cylinder, a spring is arranged in the pulley mounting groove, the pulley comprises a wheel body and a pulley support, the wheel body is fixed on the pulley support, one side portion of the spring is abutted against the inner wall of the pulley mounting groove, the other side portion of the spring is abutted against the pulley support, the wheel body extends out of an opening of the pulley mounting groove, and a protrusion used for abutting against the pulley support is arranged at the opening of the pulley mounting groove.
The application method of the device for detecting the perpendicularity of the core drilling hole of the foundation pile by using laser is characterized by comprising the following steps of:
the method comprises the following steps: early preparation, pumping water in a core drilling hole of the foundation pile out through a liquid pump;
step two: installing equipment, namely erecting a first triangular support and a second triangular support on the ground, installing a winch on the first triangular support, connecting a display receiving cylinder and the winch through a connecting rope, placing the display receiving cylinder at the position of an orifice of a drill core hole, and fixing a laser range finder on a leveling support of the second triangular support;
step three: adjusting equipment, namely adjusting the inclination angle of a leveling support to enable a laser range finder to be in a vertical state, starting the laser range finder, controlling the laser range finder to continuously emit laser to irradiate on a laser receiving target disc on the upper part of a display receiving cylinder, and taking the position of the laser point irradiated on the laser receiving target disc as an initial position;
step four: observing the laser spot, rotating the winch to move the display receiving cylinder, sliding the display receiving cylinder along the hole wall of the drill core hole through the pulley on the side wall of the display receiving cylinder, shooting the picture of the laser receiving target disc by a camera positioned in the display receiving cylinder, and observing the moving direction of the laser spot on the laser receiving target disc and the horizontal moving distance of the laser spot on the laser receiving target disc through a display device;
step five: and calculating the deflection angle, namely calculating the deflection angle of the drill core hole according to the distance measuring length of the laser distance measuring instrument and the horizontal moving distance of the laser point on the laser receiving target disc when the receiving cylinder slides along the hole wall of the drill core hole.
And in the third step, adjusting the inclination angle of the leveling support to enable the laser range finder to be in a vertical state and enable laser emitted by the laser range finder to irradiate the central point on the laser receiving target disc, and taking the central point on the laser receiving target disc as an initial position.
Through the design, the invention provides the device for detecting the perpendicularity of the drilled core hole of the foundation pile by using the laser and the use method thereof, so that the movement direction and the deflection degree of the drilled core hole are visualized, and the device plays a key role in judging a result, solving disputes and preventing engineering quality accidents; the defect that the testability is not strong due to excessive influence factors of the posture of the probe rod when the traditional inclination measurement method relies on data formed by the posture of the probe rod for judgment is overcome, the test effect is improved, and the relative error influence is small.
Drawings
FIG. 1 is a schematic view of a portion of the structure of the present invention;
FIG. 2 is a top view of a portion of the structure at a leveling support of the present invention;
FIG. 3 is a side view of a portion of the structure at the leveling feet of the present invention;
FIG. 4 is a schematic cross-sectional view of a portion of the structure of the present invention shown at the receiver drum;
FIG. 5 is a partial schematic view of the laser receiving target disk of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 5, a device for detecting perpendicularity of a drilled core hole of a foundation pile by using laser comprises a detection device body, wherein the detection device body comprises a first triangular support 1 and a second triangular support 2, a winch is arranged on the first triangular support 1, a leveling support 4 is arranged on the second triangular support 2, and a winch 3 is arranged above the leveling support 4; the leveling support 4 is provided with a laser range finder 5, a display receiving barrel 6 used for placing a drill core hole 8 is arranged below the laser range finder 5, and the winch 3 is connected with the display receiving barrel 6 through a connecting rope; the upper part of the display receiving cylinder 6 is provided with a laser receiving target disk 14 made of a light-transmitting material, the laser irradiation direction of the laser range finder 5 faces the laser receiving target disk 14, a camera 16 is arranged in the display receiving cylinder 6, the shooting direction of the camera 16 faces the laser receiving target disk 14, and the camera 16 is connected with a display device 9 arranged outside the drill core hole; the side wall of the receiving cylinder 6 is shown with a pulley 15 for abutting against the inner wall of the core hole. Through the design, the invention provides the device for detecting the perpendicularity of the drilled core hole of the foundation pile by using the laser and the use method thereof, so that the movement direction and the deflection degree of the drilled core hole are visualized, and the device plays a key role in judging a result, solving disputes and preventing engineering quality accidents; the defect that the testability is not strong due to excessive influence factors of the posture of the probe rod when the traditional inclination measurement method relies on data formed by the posture of the probe rod for judgment is overcome, the test effect is improved, and the relative error influence is small.
The cross section of the leveling support 4 is in a circular ring shape, a sliding rail 12 which is transversely arranged is arranged on the leveling support 4, an opening used for penetrating a connecting rope is formed between the sliding rail 12 and the inner wall of the leveling support 4, the sliding rail 12 comprises a sliding block, and the laser range finder 5 is arranged on the sliding block. The leveling support 4 comprises a support ring 11 and a base 13, the cross sections of the support ring 11 and the base 13 are both in a circular ring shape, the support ring 11 is arranged on the base, a slide rail 12 is arranged on the support ring 11, at least three bolt holes are arranged on the support ring 11, the at least three bolt holes are distributed along the circumferential direction of the support ring 11 at equal angles, bolts 10 are screwed in the bolt holes, and the lower parts of the bolts 10 abut against the base 13. An electronic level is built in the laser range finder 5. The bolt head is used as an adjusting knob, the inclination angle of the support ring is changed by rotating the adjusting knob, and then the inclination angle of the laser range finder 5 is adjusted through the leveling support 4, so that the laser range finder 5 can emit laser to irradiate the laser receiving target disc 14 in a vertical state.
The cross section of the laser receiving target disc 14 is circular, a first cross-shaped reference line is arranged on the laser receiving target disc 14, and the center point of the first reference line is located at the center of the laser receiving target disc 14. The laser receiving target disk 14 is provided with at least three second reference lines which are circular, the diameters of the at least three second reference lines are gradually increased and are arranged in concentric circles, and the circle centers of the second reference lines coincide with the center point of the first reference line. So that the moving direction and the horizontal moving distance of the laser spot 17 can be known by the first reference line and the second reference line. In order to facilitate shooting by the camera 16, the laser receiving target disk 14 is made of a transparent acrylic plate or a semitransparent acrylic plate.
The side wall of the display receiving cylinder 6 is provided with two groups of pulley blocks, the two groups of pulley blocks are vertically arranged on the side wall of the display receiving cylinder 6, each pulley block comprises at least three pulleys 15, and the at least three pulleys 15 are arranged at equal angles along the circumferential direction of the display receiving cylinder 6 so that the display receiving cylinder 6 can move along the length direction of the core drilling hole. Be equipped with the pulley mounting groove on the lateral wall of demonstration receiving cylinder 6, be equipped with the spring in the pulley mounting groove, pulley 15 includes wheel body, pulley support, and the wheel body is fixed on pulley support, and one side portion of spring supports on the inner wall of pulley mounting groove, and another lateral part of spring supports pulley support, and the wheel body stretches out from the opening part of pulley mounting groove, and the opening part of pulley mounting groove is equipped with the arch that is used for supporting pulley support. The spring can be a high-strength spring. The pulley 15 is pressed through the spring, so that the display receiving cylinder 6 can be tightly attached to the inner wall of the drill core hole, and the sliding effect of the display receiving cylinder 6 in the drill core hole is improved.
A use method of a foundation pile core drilling hole verticality detection device applying laser comprises the following steps:
the method comprises the following steps: early preparation, pumping out water in the core drilling hole 8 of the foundation pile through a liquid pump; step two: installing equipment, namely erecting a first triangular support 1 and a second triangular support 2 at the ground position, installing a winch 3 on the first triangular support 1, connecting a display receiving cylinder 6 and the winch 3 through a connecting rope, placing the display receiving cylinder 6 at the hole opening position of a drill core hole 8, and fixing a laser range finder 5 on a leveling support 4 of the second triangular support 2; step three: adjusting equipment, namely adjusting the inclination angle of the leveling support 4 to enable the laser range finder 5 to be in a vertical state, starting the laser range finder 5, controlling the laser range finder 5 to continuously emit laser to irradiate on a laser receiving target disc 14 on the upper part of the display receiving cylinder 6, and taking the position of the laser point irradiated on the laser receiving target disc 14 as an initial position; step four: observing the laser spot, rotating the winch 3 to move the display receiving cylinder 6, sliding the display receiving cylinder 6 along the hole wall of the drill core hole through a pulley on the side wall of the display receiving cylinder, shooting the picture of the laser receiving target disc 14 by a camera 16 positioned in the display receiving cylinder 6, and observing the moving direction of the laser spot on the laser receiving target disc 14 and the horizontal moving distance of the laser spot on the laser receiving target disc 14 through the display device 9; step five: and calculating the deflection angle, namely calculating the deflection angle of the drill core hole according to the distance measuring length of the laser distance measuring instrument 5 and the horizontal moving distance of the laser spot 17 on the laser receiving target disc 14 when the display receiving cylinder 6 slides along the hole wall of the drill core hole. The method adopts a laser emission method to judge the deflection direction and the deflection degree of the drill core hole, and has a visualization effect, smaller relative error influence and better test effect compared with the traditional detection mode of the drill core method by means of a heavy hammer principle and a parallel hole wall motion principle.
In the first step, the liquid pump adopts a small-diameter lift pump. As the integrity detection of the foundation pile core drilling method is generally carried out with water, after the core drilling is finished, the water level in a core drilling hole is sometimes higher, and the laser cannot penetrate through a water medium, a small-diameter lift pump is needed to pump water before the test, so that the test can be carried out. The maximum height of the water stored in the hole can not be higher than the length of the drilling tool.
In order to ensure the testing effect, in the third step, the inclination angle of the leveling support 4 is adjusted to enable the laser range finder 5 to be in a vertical state, and the laser emitted by the laser range finder 5 irradiates the central point on the laser receiving target disc 14, and the central point on the laser receiving target disc 14 is used as an initial position. In the third step, the inclination angle of the leveling support 4 is adjusted according to the electronic level meter built in the laser range finder 5, that is, the inclination angle of the leveling support 4 is adjusted, so that the angle of the electronic level meter in two directions is adjusted to be zero, and the laser range finder is ensured to be completely vertical.
If the situation that the drill bit drills out of the pile body exists, because the diameter of the pile body 7 is more than 800mm generally and the diameter of the core drilling hole is about 110mm generally, the diameter of the laser receiving target disk 14 can be 95mm generally, when the display receiving cylinder 6 moves to the position where the drill bit drills out of the pile body 7, the laser of the laser range finder 5 can still irradiate the laser receiving target disk 14, the fact that the horizontal moving distance of the core drilling hole 8 is not more than 0 mm-100 mm is shown, namely the moving distance of a laser spot 17 irradiating the laser receiving target disk 14 is reduced by an initial reading, and further the main reason of comprehensive judgment can be judged according to the depth, the hole opening position, the deflection direction and the horizontal moving distance of the laser spot drilling the pile body 7, or the core drilling hole 8, so that the quality accident caused by foundation pile construction inclination or the detection operation of the inclination of the core drilling hole 8 is not standard; when it is shown that the receiving cylinder 6 does not reach the position of the drill bit other than the position where the pile body 7 is drilled during the sliding process, and the laser of the laser range finder 5 has moved out of the laser receiving target disk 14, it indicates that the movement distance of the drill hole 8 in the horizontal direction has exceeded 0mm to 100mm with the inclination of the drill hole 8, that is, the movement distance of the laser spot 17 irradiated onto the laser receiving target disk 14 is reduced by the initial reading, the inclination angle of the drill hole can be calculated by the depth of the position and the movement distance in the horizontal direction, because the concrete strength is high and the diameter of the drill hole is small, according to the drill track theory, the inclination angle and the direction of the drill hole 8 do not change greatly, and the horizontal direction movement distance of the position where the pile body 7 is drilled by the drill hole 8 can be estimated by the measured inclination angle, thereby comprehensively determining the reason other than the drilling of the pile body 7.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A device for detecting the verticality of a drilled core hole of a foundation pile by using laser comprises a detection device body and is characterized in that the detection device body comprises a first triangular support and a second triangular support, wherein a winch is arranged on the first triangular support, a leveling support is arranged on the second triangular support, and the winch is arranged above the leveling support;
the leveling support is provided with a laser range finder, a display receiving cylinder used for placing a drill core hole is arranged below the laser range finder, and the winch is connected with the display receiving cylinder through a connecting rope;
the upper part of the display receiving cylinder is provided with a laser receiving target disc made of a light-transmitting material, the laser irradiation direction of the laser range finder faces the laser receiving target disc, a camera is arranged in the display receiving cylinder, the shooting direction of the camera faces the laser receiving target disc, and the camera is connected with a display device arranged outside the drill core hole;
and a pulley used for propping against the inner wall of the core drilling hole is arranged on the side wall of the display receiving cylinder.
2. The device for detecting the perpendicularity of the drill core hole of the foundation pile by using the laser as claimed in claim 1, wherein the cross section of the leveling support is circular, a sliding rail which is transversely arranged is arranged on the leveling support, an opening for passing through a connecting rope is formed between the sliding rail and the inner wall of the leveling support, the sliding rail comprises a sliding block, and the laser range finder is arranged on the sliding block.
3. The device for detecting the perpendicularity of the drill core hole of the foundation pile by using the laser as claimed in claim 1 or 2, wherein the leveling support comprises a support ring and a base, the cross sections of the support ring and the base are both circular, the support ring is arranged on the base, the slide rail is arranged on the support ring, at least three bolt holes are arranged on the support ring, the at least three bolt holes are arranged in the circumferential direction of the support ring at equal angles, bolts are screwed in the bolt holes, and the lower portions of the bolts abut against the base.
4. The apparatus for detecting the perpendicularity of a drilled hole of a foundation pile using a laser according to claim 1, wherein an electronic level is built in the laser distance measuring device.
5. The apparatus for detecting the verticality of a drilled hole of a foundation pile using laser according to claim 1, wherein the laser receiving target disc has a circular cross-section, and a cross-shaped first reference line is disposed on the laser receiving target disc, and the center point of the first reference line is located at the center of the laser receiving target disc.
6. The apparatus of claim 5, wherein at least three second reference lines are disposed on the laser receiving target disk, the second reference lines have a diameter that increases gradually and are arranged in concentric circles, and a center of the second reference line coincides with a center of the first reference line.
7. The apparatus of claim 1, wherein two sets of pulleys are disposed on the sidewall of the display receiving cylinder, the two sets of pulleys are vertically disposed on the sidewall of the display receiving cylinder, the pulleys include at least three pulleys, and the at least three pulleys are disposed at equal angles along the circumference of the display receiving cylinder.
8. The apparatus for detecting the perpendicularity of the drilled core hole of the foundation pile using the laser according to claim 1 or 7, wherein a pulley installation groove is formed in a side wall of the display receiving cylinder, a spring is disposed in the pulley installation groove, the pulley includes a pulley body and a pulley bracket, the pulley body is fixed on the pulley bracket, one side portion of the spring abuts against an inner wall of the pulley installation groove, the other side portion of the spring abuts against the pulley bracket, the pulley body extends out from an opening of the pulley installation groove, and a protrusion for abutting against the pulley bracket is disposed at the opening of the pulley installation groove.
9. The application method of the device for detecting the perpendicularity of the core drilling hole of the foundation pile by using laser is characterized by comprising the following steps of:
the method comprises the following steps: early preparation, pumping out water in the core drilling hole of the foundation pile through a liquid pump;
step two: installing equipment, namely erecting a first triangular support and a second triangular support on the ground, installing a winch on the first triangular support, connecting a display receiving cylinder and the winch through a connecting rope, placing the display receiving cylinder at the position of an orifice of a drill core hole, and fixing a laser range finder on a leveling support of the second triangular support;
step three: adjusting equipment, namely adjusting the inclination angle of a leveling support to enable a laser range finder to be in a vertical state, starting the laser range finder, controlling the laser range finder to continuously emit laser to irradiate on a laser receiving target disc on the upper part of a display receiving cylinder, and taking the position of the laser point irradiated on the laser receiving target disc as an initial position;
step four: observing the laser spot, rotating the winch to move the display receiving cylinder, sliding the display receiving cylinder along the hole wall of the drill core hole through the pulley on the side wall of the display receiving cylinder, shooting the picture of the laser receiving target disc by a camera positioned in the display receiving cylinder, and observing the moving direction of the laser spot on the laser receiving target disc and the horizontal moving distance of the laser spot on the laser receiving target disc through a display device;
step five: and calculating the deflection angle, namely calculating the deflection angle of the drill core hole according to the length of the connecting rope sent out by the winch and the horizontal moving distance of the laser spot on the laser receiving target disc when the display receiving cylinder slides along the hole wall of the drill core hole.
10. The use method of the apparatus for detecting perpendicularity of a drilled core hole of a foundation pile using laser according to claim 9, wherein in the third step, the inclination angle of the leveling support is adjusted to make the laser distance measuring instrument in a vertical state and the laser emitted from the laser distance measuring instrument irradiates the center point on the laser receiving target disk, and the center point on the laser receiving target disk is used as an initial position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211645933.7A CN115808157A (en) | 2022-12-20 | 2022-12-20 | Foundation pile core drilling perpendicularity detection device applying laser and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211645933.7A CN115808157A (en) | 2022-12-20 | 2022-12-20 | Foundation pile core drilling perpendicularity detection device applying laser and application method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116858190A (en) * | 2023-06-28 | 2023-10-10 | 中煤科工集团武汉设计研究院有限公司 | Intelligent vertical detection equipment for building engineering construction |
| CN117231201A (en) * | 2023-10-12 | 2023-12-15 | 广东省建设工程质量安全检测总站有限公司 | Error elimination method and related device for pile foundation drill hole inclination measurement |
-
2022
- 2022-12-20 CN CN202211645933.7A patent/CN115808157A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116858190A (en) * | 2023-06-28 | 2023-10-10 | 中煤科工集团武汉设计研究院有限公司 | Intelligent vertical detection equipment for building engineering construction |
| CN116858190B (en) * | 2023-06-28 | 2024-04-09 | 中煤科工集团武汉设计研究院有限公司 | Intelligent vertical detection equipment for building engineering construction |
| CN117231201A (en) * | 2023-10-12 | 2023-12-15 | 广东省建设工程质量安全检测总站有限公司 | Error elimination method and related device for pile foundation drill hole inclination measurement |
| CN117231201B (en) * | 2023-10-12 | 2024-03-29 | 广东省建设工程质量安全检测总站有限公司 | Error elimination method and related device for pile foundation drill hole inclination measurement |
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