CN113154993A

CN113154993A - Device and method for detecting thickness of sediment at bottom of drilled pile

Info

Publication number: CN113154993A
Application number: CN202110457502.7A
Authority: CN
Inventors: 王晗; 姚志鹏; 李明建
Original assignee: Beijing China Railway Chengye Engineering Construction Supervision Co Ltd
Current assignee: Beijing China Railway Chengye Engineering Construction Supervision Co Ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-07-23
Anticipated expiration: 2041-04-27
Also published as: CN113154993B

Abstract

The application relates to a device for detecting the thickness of sediment at the bottom of a drilled pile, which comprises a mounting box and a vertical measuring rod rotatably arranged on the bottom surface of the mounting box, wherein a driving device for driving the measuring rod to rotate is arranged in the mounting box, and the end part of the measuring rod, far away from the mounting box, is a measuring tip; the measuring rod is provided with a plurality of hemispheroids along the vertical direction, the measuring rod is hugged closely to one side of hemisphere plane, and mud storage cavity has been seted up to one side of hemisphere plane, has seted up the breach on the hemisphere, and the breach is towards the oblique top, breach and mud storage cavity intercommunication. The measuring speed is obviously accelerated by arranging the measuring rod and the driving device; the fixing component is arranged, so that the situation that the measuring rod inserted into the pile bottom and the pile bottom do not rotate and the mounting box rotates is prevented; through setting up measuring sleeve, bracing piece, it is convenient to make the clearance of storing up the mud chamber. The device and the method are used for measuring the thickness of the sediment at the bottom of the rotary hole pile, so that the measuring speed is high, the measured value is accurate, and the measuring method is simple and convenient.

Description

Device and method for detecting thickness of sediment at bottom of drilled pile

Technical Field

The application relates to the field of detecting the thickness of the sediment at the bottom of a drilled pile, in particular to a device and a method for detecting the thickness of the sediment at the bottom of the drilled pile.

Background

The cast-in-situ bored pile has the advantages of wide application range, high single-pile bearing capacity, low construction noise, small vibration, low unit price and the like, and is widely applied to various building projects. With the increasing of high-rise buildings, the requirement on the bearing capacity of the pile foundation is higher and higher. However, due to the particularity of the construction process of the cast-in-situ bored pile, the bearing capacity of the cast-in-situ bored pile is greatly influenced by factors in construction, and particularly, the bearing capacity of the cast-in-situ bored pile is seriously influenced by a hole bottom slag layer. Therefore, the control of the thickness of the sediment layer at the bottom of the hole plays an important role in the construction of the cast-in-situ bored pile.

The navigation mark JGJ94-2008 reduces the friction pile sediment thickness from 30 cm to 10 cm, reduces the end-supported pile sediment thickness from 10 cm to 5 cm, and increases the difficulty in construction and detection, so that the industry urgently needs a simple and quantitative efficient detection means.

The invention patent with the publication number of CN107059954B discloses a device and a method for detecting the thickness of drilled pile bottom sediment, which comprises a seat body and at least 3 supporting legs for supporting the seat body, wherein the seat body is connected with the supporting legs, and the outer surfaces of the supporting legs are provided with at least two grooves which are vertically arranged at intervals.

When the device detects the thickness of the sediment at the bottom of the drilled pile, the supporting legs and the sediment can be fully rubbed to wear the film only after 10 to 20 times of free fall, and the height of the sediment is determined by measuring the height from the worn groove to the bottom surface of the supporting legs.

In view of the above-mentioned related art, the cover device needs to pass through 10 to 20 times of free fall in use, resulting in a long measurement time, thereby affecting the construction progress.

Disclosure of Invention

In order to reduce the time spent on measurement, the application provides a device and a method for detecting the thickness of the sediment at the bottom of a bored pile.

First aspect, the application provides a drilling pile bottom sediment thickness detection device adopts following technical scheme:

a pile bottom sediment thickness detection device for a drilled pile comprises a mounting box and a vertical measuring rod rotatably arranged on the bottom surface of the mounting box, wherein a driving device for driving the measuring rod to rotate is arranged in the mounting box, and the end part, far away from the mounting box, of the measuring rod is a measuring tip;

the measuring rod is provided with a plurality of hemispheroids in a vertical direction in an arrayed mode, one side of the plane of each hemisphere is tightly attached to the measuring rod, a mud storage cavity is formed in one side of the plane of each hemisphere, a notch is formed in each hemisphere, the notch faces to the upper oblique direction, and the notch is communicated with the mud storage cavity.

Through adopting above-mentioned technical scheme, when this device used, the vertical pile bottom that inserts of measurement tip, drive arrangement drive measuring stick rotates, and measuring stick pivoted direction is the horizontal direction of breach slope, and the breach is scraped the sediment and is stored up the mud chamber, through measuring the distance that contains the hemisphere and the measuring stick bottom of sediment in storing up the mud chamber, seeks sediment thickness. The breach tilt up sets up, under the circumstances that guarantees that the breach can be scraped the sediment, when making the measurement tip insert the pile bottom, the sediment at the bottom of the pile is difficult for getting into the mud storage intracavity after splashing, makes measured data accurate. The measuring rod is rotated by the driving device, so that the gap scrapes off the sediment quickly and stores the sediment in the mud storage cavity, and the device does not need to freely fall for 10-20 times, thereby accelerating the measuring speed.

Optionally, a fixing assembly for fixing the mounting box to the pile bottom is arranged on the mounting box, and the fixing assembly includes a driving structure and at least two fixing structures;

at least two fixed knot constructs and sets up in the horizontal both ends of mounting box, fixed knot constructs including the axis of rotation of vertical setting, with the fixed stationary blade of axis of rotation top, the stationary blade level sets up, drive structure drive axis of rotation rotates.

Through adopting above-mentioned technical scheme, the drive structure drive rotates the roller bearing and rotates to drive the stationary blade and rotate towards the direction of keeping away from each other, make the stationary blade keep away from on the tip of fixed axle inserts the inner wall at the bottom of the stake, thereby fix the mounting box in the bottom of the stake department. The measuring rod inserted into the pile bottom is prevented from rotating together with the pile bottom when the driving device drives the measuring rod to rotate, and the mounting box is prevented from rotating to influence measurement.

Optionally, two fixing structures are arranged, and the driving structure comprises a toothed belt, a driving gear, two driving bevel gears and two driven bevel gears; the toothed belt is meshed with the driving gear, a rotating shaft of the driving gear is transverse, a hole through which the toothed belt penetrates is formed in the top surface of the mounting box, and the two driving bevel gears are coaxially fixed on two sides of the driving gear;

the two driven bevel gears are coaxially fixed on the two rotating shafts respectively, and the driven bevel gears are meshed with the driving bevel gear.

Through adopting above-mentioned technical scheme, personnel are drilling pile top surface and make drive gear rotate and drive the rotation of initiative bevel gear through manpower pull cingulum, make driven bevel gear rotate the back and drive rotation axis, stationary blade rotation, two stationary blades rotate towards the direction of keeping away from each other.

Optionally, the measuring rod comprises a supporting rod and a measuring sleeve tightly sleeved on the supporting rod, the top end of the supporting rod is rotatably connected with the mounting box, and the sludge storage cavity and the hemisphere are formed by outwards protruding the inner wall of the measuring sleeve.

Through adopting above-mentioned technical scheme, measure the cover and establish with the bracing piece cover, store up the mud chamber and be the space between bracing piece lateral wall and the hemisphere inner wall. The measuring sleeve can be detached from the supporting rod, the mud storage cavity is exposed towards the direction of the inner cavity of the measuring sleeve at the moment, and sediment in the mud storage cavity can be cleaned by the high-pressure water washing mode, so that the mud storage cavity is convenient to clean.

Optionally, a threaded hole is formed in the support rod, a fixing hole opposite to the threaded hole is formed in the measuring sleeve, and the support rod and the measuring sleeve are fixed through the threaded hole and the fixing hole by penetrating a screw.

By adopting the technical scheme, the measuring sleeve and the supporting rod are fixed firmly, so that when the supporting rod rotates, the supporting rod and the measuring sleeve are prevented from mutual displacement or looseness, and the pile bottom sediment has stronger friction force on the measuring sleeve, so that the measuring sleeve is easy to fall off from the supporting rod, the supporting rod and the measuring sleeve are fixed, and the measuring sleeve and the supporting rod can be effectively prevented from falling off.

Optionally, the driving device is a driving motor, and a motor shaft of the driving motor is coaxially fixed with the supporting rod.

Through adopting above-mentioned technical scheme, driving motor drive bracing piece rotates, and the bracing piece drives and measures the cover and rotate.

Optionally, the mounting box includes a box casing and a partition board fixed in the box casing, the partition board partitions an inner cavity of the box casing to form a mounting cavity and a motor cavity, the driving motor is fixed in the motor cavity, and a buffer layer is arranged in the motor cavity.

Through adopting above-mentioned technical scheme, need carry out free fall when this device uses, lead to driving motor to damage easily, the baffle keeps apart and forms the motor chamber, and driving motor is fixed in the motor chamber, and during free fall, the buffer layer has certain cushioning effect to driving motor, makes driving motor not fragile.

Optionally, the gear both sides are provided with spacing piece, when the cingulum and drive gear meshing, spacing piece is located the both sides of cingulum.

By adopting the technical scheme, the toothed belt and the rack are easy to fall off due to the fact that the device needs to be subjected to free falling, the limiting pieces are arranged, and the toothed belt is limited between the two limiting pieces, so that on one hand, when the toothed belt moves, the toothed belt and the tooth part of the driving gear are convenient to keep a meshed state; on the other hand, when the gear falls freely, the toothed belt and the driving gear are not easy to fall off.

In a second aspect, the application provides a method for detecting the thickness of the sediment at the bottom of the drilled pile, which adopts the following technical scheme:

a method for detecting the thickness of the sediment at the bottom of a drilled pile uses a device for detecting the thickness of the sediment at the bottom of the drilled pile, and the detection steps are as follows:

s1, fixing the drilled pile bottom sediment thickness detection device with a crane through a rope, placing the drilled pile bottom sediment thickness detection device into the pile bottom of the drilled pile, and inserting the measuring rod into the pile bottom;

s2, pulling the toothed belt to enable the driving gear and the driving bevel gear to rotate, enabling the driven bevel gear to rotate, enabling the two fixing pieces to rotate towards the direction away from each other, enabling the end parts, far away from the rotating shaft, of the fixing pieces to be inserted into the side walls of the hole piles, and fixing the mounting box;

s3, starting the driving device, driving the measuring rod to rotate by the driving device, scraping sediment by the notch, storing the sediment in the sediment storage cavity, and closing the driving device;

and S4, lifting the device for detecting the thickness of the sediment at the bottom of the drilled pile out of the ground, and measuring the distance from the hemisphere of the sediment at the top of the measuring rod to the bottom of the supporting rod to obtain the thickness of the sediment.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the measuring speed is obviously accelerated by arranging the measuring rod and the driving device;

2. the fixing component is arranged, so that the situation that the measuring rod inserted into the pile bottom and the pile bottom do not rotate and the mounting box rotates is prevented;

3. through setting up measuring sleeve, bracing piece, it is convenient to make the clearance of storing up the mud chamber.

Drawings

Fig. 1 is an overall schematic diagram of an embodiment of the present application.

Fig. 2 is a structural display view in the mounting box of the embodiment.

Fig. 3 is an enlarged view at a of fig. 2.

Description of reference numerals: 1. mounting a box; 11. hanging buckles; 12. measuring a hole; 2. a measuring rod; 21. a measuring sleeve; 211. a measuring tip; 212. a fixing hole; 22. a support bar; 221. a threaded hole; 222. a screw; 3. a drive device; 31. a drive motor; 4. a fixing assembly; 41. a drive structure; 411. a toothed belt; 4111. the holes are arranged; 412. a drive gear; 413. a drive bevel gear; 414. a driven bevel gear; 4121. a limiting sheet; 42. a fixed structure; 421. a rotating shaft; 422. a fixing sheet; 423. rotating the hole; 5. a hemisphere; 51. a sludge storage cavity; 52. a notch; 6. a partition plate; 61. a motor cavity; 62. a mounting cavity; 611. a buffer layer; 7. a balance weight.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses bored pile bottom sediment thickness detection device. Referring to fig. 1 and 2, the device for detecting the thickness of the sediment at the bottom of the drilled pile comprises a mounting box 1 and a measuring rod 2. A suspension buckle 11 fixed with a suspension rope is fixed on the side wall of the mounting box 1. The mounting box 1 is provided with a driving device 3 for driving the measuring rod 2, and the mounting box 1 is provided with a fixing component 4 for fixing the mounting box 1 at the bottom of the pile.

Referring to fig. 1 and 2, the mounting box 1 is hollow, a measuring hole 12 is formed in the bottom of the mounting box 1, and the measuring rod 2 is rotatably arranged in the measuring hole 12 through a bearing. The length direction of measuring stick 2 is vertical direction, and the bottom of measuring stick 2 is provided with measurement cusp 211, and measurement cusp 211 is vertical downwards.

Referring to fig. 2 and 3, the measuring rod 2 includes a measuring sleeve 21 and a supporting rod 22, the measuring sleeve 21 is sleeved on the outer wall of the supporting rod 22, and the inner wall of the measuring sleeve 21 is recessed to form a plurality of mud storage cavities 51. The inner wall of the measuring sleeve 21 is sunken on the outer wall to form a plurality of hemispheroids 5, the plane of each hemisphere 5 faces to the inner cavity of the measuring sleeve 21, and the arrangement direction of the hemispheroids 5 is the same as the length direction of the measuring sleeve 21 and is arranged at intervals. The hemisphere 5 is provided with a notch 52, the notch 52 faces to the upper oblique direction, and the notch 52 is communicated with the mud storage cavity 51.

Referring to fig. 3, a threaded hole 221 is formed in an end portion of the support rod 22 away from the measurement tip 211, a fixing hole 212 is formed in an end portion of the measurement sleeve 21 away from the measurement tip 211, a screw 222 is screwed in the threaded hole 221, and the screw 222 penetrates through the fixing hole 212 to fixedly connect the measurement sleeve 21 and the support rod 22, so that the two are not easy to loosen.

Referring to fig. 2, the driving device 3 is a driving motor 31, and the driving motor 31 is coaxially fixed with the support rod 22. A partition plate 6 is fixed in the mounting box 1, the partition plate 6 partitions an inner cavity of the mounting box 1 into a motor cavity 61 and a mounting cavity 62, the measuring hole 12 is communicated with the motor cavity 61, and the driving motor 31 is fixed on a cavity wall of the motor cavity 61 far away from the measuring hole 12.

Referring to fig. 2, the buffer layer 611 is filled in the motor cavity 61, the buffer layer 611 is made of sponge, and the buffer layer 611 buffers the driving motor 31 and supports the driving motor 31 upward, so that the impact force applied to the driving motor 31 is reduced, and the service life of the driving motor 31 is prolonged.

Referring to fig. 1 and 2, the fixing assembly 4 includes a driving structure 41 and two fixing structures 42. The fixing structure 42 includes a rotating shaft 421 vertically disposed, and a fixing plate 422 fixed to a top end of the rotating shaft 421, and a surface of the fixing plate 422 is horizontal. The rotating shaft 421 rotates and is disposed in the mounting cavity 62, the top surface of the mounting box 1 is provided with a rotating hole 423 through which the rotating shaft 421 rotates, and the fixing piece 422 is located on the top surface of the mounting box 1. The two rotating shafts 421 are disposed at two ends of the mounting box 1 in the horizontal direction, the top surface of the mounting box 1 is square, and the two rotating shafts 421 are located at opposite corners of the top surface of the mounting box 1.

Referring to fig. 2, the driving structure 41 includes a toothed belt 411, a driving gear 412, two driving bevel gears 413, and two driven bevel gears 414. The driving gear 412 is disposed in the mounting cavity 62, and the driving gear 412 is located between the two rotating shafts 421, and the rotating shaft of the driving gear 412 is in a horizontal direction. Two sides of the driving gear 412 are fixed with annular limiting pieces 4121, the toothed belt 411 is meshed with the driving gear 412, and at the moment, the toothed belt 411 is located between the two limiting pieces 4121.

Referring to fig. 1 and 2, the top surface of the mounting box 1 is provided with two holes 4111 for the toothed belt 411 to pass through, when the two toothed belts 411 pass through the holes 4111, the two fixing pieces 422 are located on the same side of the two toothed belts 411, and the rotation direction of the two fixing pieces 422 is a direction away from the toothed belts 411.

Referring to fig. 2, two drive bevel gears 413 are coaxially fixed to the drive gear 412 and fixed to both sides of the drive gear 412. Two driven bevel gears 414 are coaxially fixed to the two rotating shafts 421, and the driven bevel gears 414 are engaged with the drive bevel gear 413. When the toothed belt 411 drives the driving gear 412 and the driving bevel gear 413 to rotate, the driven bevel gear 414 rotates to enable the two fixing pieces 422 to rotate towards directions away from each other, so that the fixing pieces 422 can be inserted into the side wall at the pile bottom of the drilled pile, and the mounting box 1 is fixed.

Referring to fig. 2, the balance weight 7 is fixed in the mounting cavity 62, and the driving motor 31 has a complicated internal structure, so that the device is prone to be in a skew state when falling freely. The balance weight 7 adjusts the gravity center position of the device, so that the measuring tip 211 keeps vertical downwards when the device falls freely, and is not easy to incline.

Referring to fig. 1 and 2, in another aspect, the present application further provides a method for detecting a thickness of a drilled pile bottom sediment, including the following steps:

s1, fixing a lifting rope on the lifting buckle 11, connecting the drilled pile bottom sediment thickness detection device with a lifting machine, and inserting the measuring rod 2 into sediment at the bottom of the pile through free falling for 1-3 times;

s2, a worker pulls the toothed belt 411 to enable the driving gear 412 to rotate and then drive the driving bevel gear 413 to rotate, the driving bevel gear 413 rotates to drive the driven bevel gear 414 to rotate, the two fixing pieces 422 are enabled to rotate to one side far away from each other, and at the moment, the end parts, far away from each other, of the fixing pieces 422 are inserted into the side wall of the pile bottom of the hole pile to fix the mounting box 1;

s3, starting the driving motor 31 to enable the supporting rod 22 to drive the measuring sleeve 21 to rotate, scraping sediment by the notch 52 and storing the sediment in the mud storage cavity 51, and closing the driving motor 31 after the measuring rod 2 rotates for 5-30 circles;

s4, the crane lifts the hole pile bottom sediment thickness detection device out of the ground, and the worker measures the distance from the hemisphere 5 full of the topmost sediment to the bottom of the support rod 22 as the sediment thickness;

s5, the screw 222 is unscrewed, the support rod 22 and the measuring sleeve 21 are detached, the inner wall of the measuring sleeve 21 is cleaned by high-pressure water, and then the support rod 22 and the measuring sleeve 21 are installed to prepare for the next measurement.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a drilling stake pile bottom sediment thickness detection device which characterized in that: the measuring device comprises a mounting box (1) and a vertical measuring rod (2) rotatably arranged on the bottom surface of the mounting box (1), wherein a driving device (3) for driving the measuring rod (2) to rotate is arranged in the mounting box (1), and the end part, far away from the mounting box (1), of the measuring rod (2) is a measuring tip (211);

the measuring rod (2) is provided with a plurality of hemispheroids (5) in a vertical direction in an arrayed mode, the measuring rod (2) is tightly attached to one planar side of each hemisphere (5), a mud storage cavity (51) is formed in one planar side of each hemisphere (5), a notch (52) is formed in each hemisphere (5), the notch (52) faces the obliquely upper side, and the notch (52) is communicated with the mud storage cavity (51).

2. The device for detecting the thickness of the drilled pile bottom sediment according to claim 1, characterized in that: the mounting box (1) is provided with a fixing component (4) for fixing the mounting box (1) to a pile bottom, and the fixing component (4) comprises a driving structure (41) and at least two fixing structures (42);

at least two fixed knot constructs (42) and sets up in the horizontal both ends of mounting box (1), fixed knot constructs (42) including vertical axis of rotation (421) that set up, with stationary blade (422) that axis of rotation (421) top is fixed, stationary blade (422) level sets up, drive structure (41) drive axis of rotation (421) rotate.

3. The device for detecting the thickness of the drilled pile bottom sediment according to claim 2, characterized in that: the number of the fixed structures (42) is two, and the driving structure (41) comprises a toothed belt (411), a driving gear (412), two driving bevel gears (413) and two driven bevel gears (414); the toothed belt (411) is meshed with the driving gear (412), a rotating shaft of the driving gear (412) is transverse, a hole (4111) for the toothed belt (411) to penetrate through is formed in the top surface of the mounting box (1), and the two driving bevel gears (413) are coaxially fixed on two sides of the driving gear (412);

the two driven bevel gears (414) are respectively and coaxially fixed on the two rotating shafts (421), and the driven bevel gears (414) are meshed with the driving bevel gear (413).

4. The device for detecting the thickness of the drilled pile bottom sediment according to claim 3, characterized in that: the measuring rod (2) comprises a supporting rod (22) and a measuring sleeve (21) tightly sleeved on the supporting rod (22), the top end of the supporting rod (22) is rotatably connected with the mounting box (1), and the sludge storage cavity (51) and the hemispheroid (5) are formed by outwards protruding the inner wall of the measuring sleeve (21).

5. The device for detecting the thickness of the drilled pile bottom sediment according to claim 4, characterized in that: the support rod (22) is provided with a threaded hole (221), the measuring sleeve (21) is provided with a fixing hole (212) opposite to the threaded hole (221), and the support rod (22) and the measuring sleeve (21) are fixed through a screw (222) penetrating through the threaded hole (221) and the fixing hole (212).

6. The device for detecting the thickness of the drilled pile bottom sediment according to claim 1, characterized in that: the driving device (3) is a driving motor (31), and a motor shaft of the driving motor (31) is coaxially fixed with the supporting rod (22).

7. The device for detecting the thickness of the drilled pile bottom sediment according to claim 6, characterized in that: the mounting box (1) comprises a box shell and a partition plate (6) fixed in the box shell, the partition plate (6) separates an inner cavity of the box shell to form a mounting cavity (62) and a motor cavity (61), the driving motor (31) is fixed in the motor cavity (61), and a buffer layer (611) is arranged in the motor cavity (61).

8. The device for detecting the thickness of the drilled pile bottom sediment according to claim 1, characterized in that: the two sides of the driving gear (412) are provided with limiting pieces (4121), and when the toothed belt (411) is meshed with the driving gear (412), the limiting pieces (4121) are positioned on the two sides of the toothed belt (411).

9. A method for detecting the thickness of the sediment at the bottom of a bored pile, which is characterized in that the device for detecting the thickness of the sediment at the bottom of the bored pile according to any one of claims 1 to 8 is used for detection, and the detection steps are as follows:

s1, fixing the drilled pile bottom sediment thickness detection device with a crane through a rope, placing the drilled pile bottom sediment thickness detection device into the pile bottom of the drilled pile, and inserting the measuring rod (2) into the pile bottom;

s2, pulling the toothed belt (411) to enable the driving gear (412) and the driving bevel gear (413) to rotate, enabling the driven bevel gear (414) to rotate, enabling the two fixing pieces (422) to rotate towards the direction away from each other, enabling the end parts, away from the rotating shaft (421), of the fixing pieces (422) to be inserted into the side walls of the hole piles, and fixing the mounting box (1);

s3, starting the driving device (3), driving the measuring rod (2) to rotate by the driving device (3), scraping sediment by the notch (52) and storing the sediment in the sediment storage cavity (51), and closing the driving device (3);

and S4, lifting the device for detecting the thickness of the sediment at the bottom of the drilled pile out of the ground, and measuring the distance from the hemisphere (5) of the sediment at the top of the measuring rod (2) to the bottom of the supporting rod (22) to obtain the thickness of the sediment.