CN112160743A - Method for detecting perpendicularity of drilled hole and method for detecting perpendicularity of pile body - Google Patents
Method for detecting perpendicularity of drilled hole and method for detecting perpendicularity of pile body Download PDFInfo
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- CN112160743A CN112160743A CN202010962296.0A CN202010962296A CN112160743A CN 112160743 A CN112160743 A CN 112160743A CN 202010962296 A CN202010962296 A CN 202010962296A CN 112160743 A CN112160743 A CN 112160743A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000003550 marker Substances 0.000 claims abstract description 51
- 238000005553 drilling Methods 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims description 17
- 239000011148 porous material Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 19
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention relates to the technical field of engineering quality detection, and discloses a method for detecting the perpendicularity of a drilled hole, wherein a device for measuring the perpendicularity of the drilled hole and a pile body is adopted, and the device comprises a circular ring body, a rope line and a marker, wherein one end of the rope line is connected to the center of the circular ring body, and the marker is movably arranged on the rope line; the detection method comprises the following steps: after drilling and coring are carried out on the pile body, filling water into the drill hole; putting the circular ring body into the drill hole, and lowering the rope line to expose the marker out of the water surface; once the circular ring body is close to the wall of the drilled hole, the rope line is stopped to be lowered; measuring the distance S between the marker and the center of the drill hole, measuring the length L of the rope line below the water surface, and then the inclination angle of the drill hole: α ═ arc tan (S/L). Through transferring circular ring body to drilling, press close to the pore wall of drilling through circular ring body, calculate the angle of inclination of drilling, simple structure, it is convenient to measure.
Description
Technical Field
The invention relates to the technical field of engineering quality detection, in particular to a drilling perpendicularity detection method and a pile body perpendicularity detection method.
Background
The verticality of the pile should be well controlled in engineering construction, and if the pile body is inclined too much, the risk of easy dumping exists. Technical standards generally require that the perpendicularity deviation, i.e. the inclination (ratio of horizontal deviation to pile length) of the pile must not exceed 0.5-1.0%, the perpendicularity of the pile body on the ground is easier to measure, but some pile bodies are buried under the ground. Since the verticality of a pile embedded in the ground is difficult to measure, the actual verticality is usually unknown, i.e. whether the deviation meets the technical standard. In addition, after the pile is formed, usually, holes are drilled to detect the pile quality, the probability that the drilled holes in the long pile deviate from the pile body is high, the longer the pile body is, the higher the probability that the drilled holes deviate from the pile body is, the harder the drilled holes are drilled to the bottom, and when the situation occurs, the difficulty in judging whether the pile deviates, the hole drilling deviates or both the pile deviation and the hole drilling deviate is caused, and disputes are often caused.
The prior art lacks a simple method for effectively detecting the perpendicularity of a drill hole or the perpendicularity of a pile body buried under the ground.
Disclosure of Invention
The invention aims to provide a method for detecting the perpendicularity of a drill hole and a method for detecting the perpendicularity of a pile body, and aims to solve the problem that the perpendicularity of the drill hole or the pile body buried under the ground is difficult to effectively detect in the prior art.
The invention is realized in this way, a method for detecting the verticality of a drilled hole adopts a device for measuring the verticality of the drilled hole and a pile body, the measuring device comprises a circular ring body, a rope line and a marker, one end of the rope line is connected to the center of the circular ring body, and the marker is movably arranged on the rope line; the detection method comprises the following steps:
(1) after drilling and coring are carried out on the pile body, filling water into the drill hole;
(2) putting the circular ring body into the drill hole, and adjusting the position of the marker at any time when the rope is put down to enable the marker to be exposed out of the water surface; once the circular ring body is close to the hole wall of the drilled hole, the rope line is stopped to be lowered;
(3) measuring the distance S between the marker and the center of the drill hole, measuring the length L of the rope line below the water surface, and then the inclination angle of the drill hole: α ═ arc tan (S/L).
Further, the measuring device further comprises a cross, and after the step (2), the cross is placed on the hole of the drilled hole, so that the center of the cross is coincident with the center of the drilled hole.
Further, rotating the cross about the center of the cross such that the marker engages one side of the cross.
Further, the azimuth angle of the marker is measured using a compass.
Furthermore, the cross is provided with scale marks for measuring and reading the distance between the marker and the center of the cross.
Furthermore, the rope line is provided with scale marks for measuring and reading the length of the rope line below the water surface.
Further, in the steps (1) to (3), if the borehole is not full of water, supplementing water into the borehole.
A pile body perpendicularity detection method, which adopts the drill hole perpendicularity detection method as claimed in any one of claims 1-7, and measures the inclination angle alpha of the drill hole;
if the drilled hole is drilled to the bottom of the pile body smoothly, the verticality deviation of the pile body meets the technical standard requirement, and measurement is not needed;
if the drill hole deviates from the side wall of the pile body, detecting according to the following steps:
if the inclination rate of the drilled hole is larger than the technical standard allowable range, re-drilling the hole for detection, and ensuring the verticality of the drilled hole;
if the inclination rate of the drilled hole is not larger than the technical standard allowable range, measuring the radius r of the pile body; measuring the length h of the drill hole in the pile body;
when the inclination direction of drilling is the same with the inclination direction of pile body, the inclination angle of pile body is: θ ═ arc tan (r/h) + arc tan (S/L);
when the inclination direction of drilling is opposite to the inclination direction of pile body, the inclination angle of pile body is: θ ═ arc tan (r/h) -arc tan (S/L).
Further, the technical standard allowable range of the inclination rate of the drill hole is as follows: tan alpha is less than or equal to 1 percent.
Further, if the drill hole deviates from the side wall of the pile body and the inclination rate of the drill hole is not larger than the technical standard allowable range, a drill hole is made to further find out the inclination rate of the pile body.
Compared with the prior art, the detection method provided by the invention adopts the device for measuring the inclination rate of the drilled hole and the perpendicularity of the pile body to detect the inclination rate of the drilled hole, and the drilled hole is filled with water, so that a marker on a rope line can be easily and accurately marked at the drilling opening position of the drilled hole; through transferring circular ring body to drilling, until the pore wall of drilling is pressed close to circular ring body, can confirm the skew distance and the skew direction at rope line and drilling center, can record the length of rope line below the surface of water to calculate the angle of inclination of drilling, simple structure, it is convenient to measure.
Drawings
FIG. 1 is a schematic diagram of a borehole verticality test according to the present invention;
FIG. 2 is a schematic diagram of borehole perpendicularity detection and borehole deviation direction detection according to the present invention;
FIG. 3 is a schematic perspective view of a device for measuring perpendicularity of a drilled hole and a pile body according to the present invention;
FIG. 4 is a schematic perspective view of a connector of the device for measuring perpendicularity of a drilled hole and a pile body provided by the invention;
FIG. 5 is a schematic cross-sectional view of a drill hole drilled to the bottom of a pile in the process of detecting the perpendicularity of a pile body provided by the invention;
FIG. 6 is a schematic cross-sectional view of a pile body with a vertical pile body and an excessive inclination of a drill hole in the process of detecting the perpendicularity of the pile body provided by the invention;
FIG. 7 is a schematic cross-sectional view of a pile shaft with an excessive inclination rate due to vertical drilling in the process of detecting the perpendicularity of the pile shaft provided by the invention;
fig. 8 is a schematic cross-sectional view of the inclination of both the drilled hole and the pile body in the process of detecting the perpendicularity of the pile body provided by the invention.
Description of reference numerals:
the method comprises the following steps of (1) a pile body, a drill hole 2 and a measuring device 3;
the cross-shaped ring comprises a circular ring body 10, a rope line 20, a marker 30, a cross wire 40, a connector 50, a horizontal pipe 51a, a vertical pipe 52 and a cross 60.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-8, preferred embodiments of the present invention are shown.
A method for detecting the verticality of a drilled hole adopts a device 3 for measuring the verticality of the drilled hole and a pile body, wherein the measuring device 3 comprises a circular ring body 10, a rope line 20 and a marker 30, one end of the rope line 20 is connected to the center of the circular ring body 10, and the marker 30 is movably arranged on the rope line 20; the method for detecting the perpendicularity of the drill hole comprises the following steps:
(1) after drilling and coring are carried out on the pile body 1, filling water into the drill hole 2, and if the water is not full, filling water into the drill hole 2;
(2) putting the circular ring body 10 of the measuring device 3 into the drill hole 2, and adjusting the position of the marker 30 at any time when the rope line 20 is lowered to enable the marker 30 to be exposed out of the water surface; once the circular ring 10 is close to the wall of the borehole 2, the lowering of the string 20 is stopped;
(3) measuring the distance S of the marker 30 from the center of the borehole 2, measuring the length L of the line 20 below the water surface, the inclination angle of the borehole 2: α ═ arc tan (S/L).
The detection method provided by the embodiment adopts the drilling and pile body perpendicularity measuring device 3 to detect the inclination rate of the drilling hole 2, water is filled in the drilling hole 2, and the marker 30 on the rope line 20 can be easily and accurately marked at the drilling opening position of the drilling hole 2; through transferring circular ring body 10 to drilling 2, until circular ring body 10 presses close to the pore wall of drilling 2, can confirm the skew distance and the skew direction at rope line 20 and drilling 2 center, can record the length of rope line 20 below the surface of water to calculate the angle of inclination of drilling 2, simple structure, it is convenient to measure.
Referring to fig. 3-4, the device 3 for measuring the perpendicularity of a drilling hole and a pile body used in the present embodiment includes:
the connector comprises a circular ring body 10, wherein a connector is arranged on the central axis of the circular ring body 10; the outer diameter of the circular ring body 10 is slightly smaller than the diameter of the borehole 2, and can be generally 3-10mm smaller; the diameter of the bore 2 is about 10 cm.
The bottom end of the rope 20 is connected to the connecting head;
and a marker 30, the marker 30 being movably disposed on the cord 20.
In this embodiment, the structure that adopts the circular ring body makes it more smooth and easy transferring the in-process, and circular ring body 10 is difficult for the card in drilling 2, and the degree of depth that can transfer is great to improve the measurement accuracy of drilling inclination. The connecting head is hung on the central axis of the circular ring body 10 through the rope line 20, so that the rope line 20 is ensured to be positioned on the central axis of the circular ring body 10 during measurement, and meanwhile, the circular ring body 10 is positioned on a horizontal plane, so that the radial distance between the rope line 20 and the outer surface of the circular ring body 10 is half of the outer diameter of the circular ring body 10; through the movable marker 30 arranged on the rope line 20, the depth and the position of the measuring device 3 extending into the ring body can be conveniently determined, so that the inclination degree and the position of the drilled hole 2 can be measured, the inclination degree and the position of the pile body 1 can be further deduced, and the measurement of the perpendicularity of the pile body 1 can be realized.
The circular ring body 10 can be made by bending materials such as steel bars and steel bars, and the diameter of the steel bars is 10-30 mm; it can also be made by casting metal material. Two mutually perpendicular steel wires are arranged on the circular ring body 10 to form a cross wire 40, the center of the cross wire 40 is on the central axis of the circular ring body 10, and the diameter of the steel wire is 0.5-2.0 mm. The rope 20 can be a fishing line, one end of the rope 20 is fixed at the center of the cross-shaped wire 40, the marker 30 is arranged at the other end of the rope 20, and the marker 30 can be a float which is arranged on the rope 20 in a penetrating way. The steel wires vertically arranged on the circular ring body 10 can relatively simply determine the center of the circular ring body 10, and simultaneously the circular ring body 10 is not easy to generate side rollover. When no external force is applied, the buoy stays on the rope 20 and keeps still; when an external force is applied, the float can move on the line 20. While lowering a length of the string 20, the float is moved a length of the string 20 at the same time, so that the depth of the circular ring 10 extending into the borehole 2 can be measured. The drilling and pile body verticality measuring device 3 provided by the embodiment has the advantages of simple structure, convenience in mass production and manufacturing, simplicity in material drawing and convenience in measurement.
The measuring device 3 may comprise a connecting head 50, the connecting head 50 comprising two horizontal pipes arranged perpendicular to each other and a vertical pipe arranged vertically, the vertical pipe being located at the vertical intersection of the two horizontal pipes. The pipe inner diameter of the horizontal pipe fitting is slightly larger than the diameter of the steel wire, and the pipe inner diameter of the vertical pipe fitting is slightly larger than the diameter of the rope 20.
When the circular ring 10 is installed, the two perpendicular steel wires are respectively arranged on the two perpendicular horizontal pipe fittings 51 and 51a in a penetrating way, so that the two perpendicular steel wires are not easy to deviate, and the center of the circular ring 10 is easier to determine and maintain. The rope 20 passes through the vertical pipe 52 and then is fixedly connected to the connector 50, the inner wall of the vertical pipe 52 limits the rope 20 to turn over, so that the circular ring 10 is not easy to turn over in the measuring process, and the rope 20 can be kept on the central axis of the circular ring 10 to ensure the measuring precision of the measuring device 3.
The marker 30 of the measuring device 3 is movably arranged on the line 20. The marker 30 may be provided with a fastening portion which is elastically fastened by a spring. When the clasp is opened, the marker 30 is free to move on the cord 20; when the clasp is closed, the marker 30 is locked onto the cord 20. By opening or closing the marker 30 with the elastic closing part, the marker 30 can be conveniently moved or locked on the string 20, and the string 20 and the marker 30 are prevented from being worn or worn too fast.
In another embodiment of the measuring device 3, a device 3 for measuring perpendicularity of a drilled hole and a pile body comprises:
the connector comprises a circular ring body 10, wherein a connector is arranged on the central axis of the circular ring body 10; the outer diameter of the circular ring body 10 is slightly smaller than the diameter of the borehole 2, and can be generally 3-10mm smaller;
the bottom end of the rope 20 is connected to the connecting head;
and a marker 30, the marker 30 being movably disposed on the cord 20;
the circular ring body 10 includes a plurality of connecting pieces, and the one end of a plurality of connecting pieces is evenly arranged on circular ring body 10, and the other end of a plurality of connecting pieces intersects in the central axis of circular ring body 10.
The plurality of connecting members of the circular ring body 10 may be rigid spokes of equal length, one ends of the spokes of equal length are uniformly arranged on the inner circumference of the circular ring body 10, the other ends of the spokes of equal length intersect at the center of the circular ring body 10, the spokes of equal length and the circular ring body 10 may be integrally formed, and the cord 20 is connected at the center of the circular ring body 10. The rope thread 20 can be always kept at the center of the circular ring body 10 and can not be always deviated.
Or, the plurality of connecting members of the circular ring body 10 may be three or more steel wires with equal length, for example, four steel wires with equal length may be uniformly arranged on the circumference of the circular ring body 10, the length of the steel wire is greater than the radius of the circular ring body 10, and the top ends of the steel wires are connected with the bottom ends of the cords 20. Since the evenly arranged steel wires are of equal length, the connection between the top ends of the steel wires and the bottom end of the cord 20 is located on the central axis of the circular ring body 10. The uniform arrangement of the plurality of steel wires with equal length can easily determine the central axis of the circular ring body 10 on one hand, and provide the circular ring body 10 with better stability and difficult turnover on the other hand.
The connecting part of the top ends of the equal-length steel wires and the rope line 20 can be provided with a connecting head, the top ends of the equal-length steel wires are connected below the connecting head, a section of vertical pipe fitting is arranged above the connecting head, and the rope line 20 penetrates through the vertical pipe fitting to be connected to the connecting head, so that the measuring device 3 is not easy to generate turnover, and the measuring accuracy is guaranteed.
The connecting head is hung on the central axis of the circular ring body 10 through the rope line 20, so that the rope line 20 is ensured to be positioned on the central axis of the circular ring body 10 during measurement, and meanwhile, the circular ring body 10 is positioned on a horizontal plane, so that the radial distance between the rope line 20 and the outer surface of the circular ring body 10 is half of the outer diameter of the circular ring body 10; through the movable marker 30 arranged on the rope line 20, the depth and the position of the measuring device 3 extending into the ring body can be conveniently determined, so that the inclination degree and the position of the drilled hole 2 can be measured, the inclination degree and the position of the pile body 1 can be further deduced, and the measurement of the perpendicularity of the pile body 1 can be realized.
In the embodiment of the present invention, the string 20 may be provided with a scale mark, which is beneficial for measuring and reading the length, and conveniently measuring and reading the depth of the circular ring 10 extending into the borehole 2.
The measuring device 3 further comprises a cross 60, the cross 60 comprising two bars perpendicular to each other, the midpoints of the two bars coinciding to form the center of the cross 60. The length of cross 60 pole is not less than the diameter of drilling 2, and cross 60 can be settled on the surface of drilling 2 like this, and the center of cross 60 coincides with the center of drilling 2, conveniently cooperates compass, compass etc. to confirm the position that rope line 20 deviates from drilling 2 center, conveniently measures the distance that rope line 20 deviates from drilling 2 center. The cross 60 has graduation marks to facilitate the measurement of the distance that the string 20 deviates from the center of the borehole 2.
Measuring device 3 still includes the spiral storage device of rope wire 20, and spiral storage device includes spiral cylinder and hand handle, and rope wire 20 connects in the winding groove of spiral cylinder, and hand handle and spiral cylinder transmission are connected. When hand handle rotated, the spiral cylinder was along with rotating or the antiport, and simultaneously the rope-line 20 was drawn in to the spiral inslot or was emitted from the spiral inslot by the spiral, made the rope-line be difficult to the winding together like this, accomodate and use all convenient much more.
The measuring device 3 is simple in structure and mechanical components and convenient to manufacture in a large scale. When the measuring device 3 is used for measuring the verticality of the drilled hole, the operation is more convenient, and the measurement can be completed by a single person.
In the process of detecting the perpendicularity of the drilled hole by using the device for measuring the perpendicularity of the drilled hole and the pile body in the embodiment, after the step (2), the cross 60 is placed on the hole opening of the drilled hole 2, so that the center of the cross 60 coincides with the center of the drilled hole 2. This allows the position of the centre of the borehole 2 to be determined, and thus the distance and direction of deviation of the line 20 from the centre of the borehole 2 to be determined, for convenience.
The distance of the line 20 from the center of the borehole 2 and the length of the line 20 below the water surface (i.e., the depth of the circular ring 10 down into the borehole 2 when the circular ring 10 is proximate to the wall of the borehole 2) can be measured using a steel ruler.
In the detection process, the cross 60 can be rotated around the center of the cross 60, so that the marker 30 is attached to one side of the cross 60, the distance between the rope line 20 and the center of the borehole 2 can be measured more conveniently, and the azimuth angle of the position of the marker 30 can be measured conveniently.
A compass, or the like is employed to measure the azimuth of the marker 30. The compass, etc. can clearly indicate the geographical orientation of the south, east, west and north, taking the center of the bore 2 as the center, and can indicate the orientation of the south, east, west and north at the orifice of the bore 2. When one side of the cross 60 is adjacent to the marker 30, the azimuth of the one side of the cross 60 is the azimuth of the marker 30, which also represents the inclination direction of the borehole 2.
In the detection process, the cross 60 is provided with scale marks for measuring and reading the distance between the marker 30 and the center of the cross 60, so that the measurement is more convenient and faster.
In the detection process, the line 20 is provided with scale marks for measuring and reading the length of the line 20 below the water surface, so that the measurement is more convenient and faster.
In the detection process, in the steps (1) to (3), if the water in the drill hole 2 is not full, water is supplemented into the drill hole 2. The marker 30 is always positioned on the water surface and at the hole opening position of the drill hole 2, so that the measurement is more convenient and the accuracy is higher.
During the drilling process, when the pressure is controlled correctly and the water is supplied properly, the pressure reduction measure is also considered when the weight of the drilling tool exceeds a certain weight.
In the process of drilling, the force is proper in magnitude and direction, the aperture is required to be uniform and not to be neglected, and too much measurement error is avoided.
The pile body buried under the bottom surface can reach several meters, more than ten meters or even dozens of meters, certain requirements are made on the verticality of the pile body, and if the pile body is inclined too much, the risk of toppling, breaking, collapsing and the like is caused under the influence of the gravity of the pile body.
Referring to fig. 5-8, a method for detecting perpendicularity of a pile body adopts the method for detecting perpendicularity of a drilled hole in the above embodiments, and an inclination angle α of the drilled hole 2 and an inclination direction of the drilled hole 2 are measured;
referring to fig. 5, if the drill hole 2 is drilled to the bottom of the pile body 1, the verticality deviation of the pile body 1 is generally considered to meet the technical standard requirement in the engineering, and measurement is not needed;
if the bore hole 2 deviates from the side wall of the pile shaft 1, the length of the bore hole 2 in the pile shaft 1 is smaller than the length of the pile shaft 1, the length of the pile shaft 1 is generally known or measurable, and the length of the bore hole 2 in the pile shaft 1 is measurable.
There are 3 possibilities for this: deviation caused by overlarge inclination rate of the drill hole 2; deviation caused by overlarge inclination rate of the pile body 1; and deviation caused by inclination of the drilling hole 2 and the pile body 1.
At the moment, the verticality deviation of the drill hole 2 needs to be measured to judge whether the drill hole 2 is excessively inclined or the pile body 1 is excessively inclined.
Then the detection is carried out according to the following steps:
if the inclination rate of the drill hole 2 is larger than the technical standard allowable range (the technical standard allowable range of the inclination rate of the drill hole 2 is generally 0.5% -1%), the drill hole 2 is detected again, and the verticality of the drill hole 2 is ensured; technical standards generally require that the perpendicularity deviation, i.e. the inclination of the pile (the ratio of the amount of horizontal deviation to the length of the pile) should not exceed 0.5% to 1.0%.
If the inclination rate of the drill hole 2 is not larger than the technical standard allowable range, measuring the radius r of the pile body 1; measuring the length h of the drill hole 2 in the pile body 1;
if the inclination direction of pile shaft 1 is known, measurable or determinable
When the inclined direction of drilling 2 is the same with the inclined direction of pile body 1, the angle of inclination of pile body 1 is: θ ═ arc tan (r/h) + arc tan (S/L);
when the inclination direction of drilling 2 is opposite to the inclination direction of pile body 1, the inclination angle of pile body 1 is: θ ═ arc tan (r/h) -arc tan (S/L).
If the inclination direction of the pile body 1 is unknown, in this case, a drill hole 2 is additionally drilled, the inclination rate and the inclination direction of the drill hole 2 and the inclination rate of the pile body 1 are measured by the same method, and the inclination direction of the pile body 1 can be judged according to the inclination rates of the drill hole 2 and the pile body 1 measured in the front and back directions and in different inclination directions, so that the inclination rate of the pile body 1 is further determined. For example, the inclination direction of the current drilling hole 2 is the same as the inclination direction of the pile body 1, and the inclination direction of the next drilling hole 2 is opposite to the inclination direction of the pile body 1, so that the actual inclination direction of the pile body 1 can be distinguished from the inclination rate of the pile body 1 calculated twice from the front and the back, and the measurement accuracy of the perpendicularity of the pile body 1 is improved.
Referring to fig. 7, if the inclination angle of bore 2 is 0, i.e. bore 2 is vertical, it means that the inclination of shaft 1 is greater such that bore 2 is offset from the side wall of shaft 1, and the inclination angle of shaft 1 is: θ ═ arc tan (r/h).
The detection method provided by the embodiment adopts the device for measuring the perpendicularity of the drill hole and the pile body to detect the inclination rate of the drill hole 2, water is filled in the drill hole 2, and the marker 30 on the rope line 20 can be easily and accurately marked at the drill opening position of the drill hole 2; the deviation distance and the deviation direction of the rope line 20 and the center of the drill hole 2 can be determined by descending the circular ring body 10 to the drill hole 2 until the circular ring body 10 is close to the hole wall of the drill hole 2, the length of the rope line 20 below the water surface can be measured, and the inclination angle of the drill hole 2 can be calculated; and then the inclination rate of the pile body 1 is judged according to the position relation between the drill hole 2 and the pile body 1 and the length of the drill hole 2 in the pile body 1, the structure is simple, and the measurement is convenient.
In engineering detection, a certain error is allowed to exist, but the detection error is controlled within a certain range, the detection value can reflect the main condition of the detected target, and the reference detection value can evaluate the detected target to a certain degree. The inclination rate of the drill hole and the inclination rate of the pile body measured by the detection method in the embodiment have good value for detecting the engineering quality, and can be widely applied.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for detecting the verticality of a drilled hole is characterized in that a device for measuring the verticality of the drilled hole and a pile body is adopted in the detection method, the measuring device comprises a circular ring body, a rope line and a marker, one end of the rope line is connected to the center of the circular ring body, and the marker is movably arranged on the rope line; the detection method comprises the following steps:
(1) after drilling and coring are carried out on the pile body, filling water into the drill hole;
(2) putting the circular ring body into the drill hole, and adjusting the position of the marker at any time when the rope is put down to enable the marker to be exposed out of the water surface; once the circular ring body is close to the hole wall of the drilled hole, the rope line is stopped to be lowered;
(3) measuring the distance S between the marker and the center of the drill hole, measuring the length L of the rope line below the water surface, and then the inclination angle of the drill hole: α ═ arc tan (S/L).
2. A method of detecting the perpendicularity of a borehole as in claim 1, wherein the measuring device further comprises a cross, and after step (2), the cross is placed over the opening of the borehole such that the center of the cross coincides with the center of the borehole.
3. The method of claim 2, wherein the cross is rotated about the center of the cross such that the marker engages one edge of the cross.
4. A borehole perpendicularity detection method as claimed in claim 3, wherein an azimuth angle of the marker is measured using a compass.
5. The method for detecting the perpendicularity of a drilled hole as claimed in claim 3, wherein the cross is provided with scale marks for measuring and reading the distance between the marker and the center of the cross.
6. The method for detecting the perpendicularity of the drilled hole as claimed in claim 2, wherein the string line is provided with scale marks for measuring the length of the string line below the water surface.
7. A method for detecting the verticality of a drilled hole according to claim 2, wherein in steps (1) to (3), if the drilled hole is not full of water, water is supplemented into the drilled hole.
8. A pile body perpendicularity detection method, characterized in that a drill hole perpendicularity detection method according to any one of claims 1-7 is adopted, and an inclination angle α of the drill hole is measured;
if the drilled hole is drilled to the bottom of the pile body smoothly, the verticality deviation of the pile body meets the technical standard requirement, and measurement is not needed;
if the drill hole deviates from the side wall of the pile body, detecting according to the following steps:
if the inclination rate of the drilled hole is larger than the technical standard allowable range, re-drilling the hole for detection, and ensuring the verticality of the drilled hole;
if the inclination rate of the drilled hole is not larger than the technical standard allowable range, measuring the radius r of the pile body; measuring the length h of the drill hole in the pile body;
when the inclination direction of drilling is the same with the inclination direction of pile body, the inclination angle of pile body is: θ ═ arc tan (r/h) + arc tan (S/L);
when the inclination direction of drilling is opposite to the inclination direction of pile body, the inclination angle of pile body is: θ ═ arc tan (r/h) -arc tan (S/L).
9. The pile body verticality detection method according to claim 7, wherein the technical standard allowable range of the inclination rate of the drilled hole is as follows: tan alpha is less than or equal to 1 percent.
10. The method of claim 7, wherein if the bore hole deviates from the sidewall of the pile body and the inclination of the bore hole is not greater than the allowable range of the technical standard, a bore hole is made to find out the inclination of the pile body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010962296.0A CN112160743A (en) | 2020-09-14 | 2020-09-14 | Method for detecting perpendicularity of drilled hole and method for detecting perpendicularity of pile body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719272A (en) * | 2021-09-01 | 2021-11-30 | 航天建筑设计研究院有限公司 | Vertical measurement while drilling control device for drilled pile |
| CN113756375A (en) * | 2021-09-09 | 2021-12-07 | 中国二冶集团有限公司 | Method for measuring pile hole verticality deviation of slurry wall protection rotary drilling cast-in-place pile |
| CN115493562A (en) * | 2022-09-06 | 2022-12-20 | 滕州城建集团有限公司 | Building engineering is with straightness detection device that hangs down |
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2020
- 2020-09-14 CN CN202010962296.0A patent/CN112160743A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719272A (en) * | 2021-09-01 | 2021-11-30 | 航天建筑设计研究院有限公司 | Vertical measurement while drilling control device for drilled pile |
| CN113756375A (en) * | 2021-09-09 | 2021-12-07 | 中国二冶集团有限公司 | Method for measuring pile hole verticality deviation of slurry wall protection rotary drilling cast-in-place pile |
| CN115493562A (en) * | 2022-09-06 | 2022-12-20 | 滕州城建集团有限公司 | Building engineering is with straightness detection device that hangs down |
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