CN111829413A - Device and method for detecting thickness of sediment at hole bottom of drilled pile - Google Patents
Device and method for detecting thickness of sediment at hole bottom of drilled pile Download PDFInfo
- Publication number
- CN111829413A CN111829413A CN202010637726.1A CN202010637726A CN111829413A CN 111829413 A CN111829413 A CN 111829413A CN 202010637726 A CN202010637726 A CN 202010637726A CN 111829413 A CN111829413 A CN 111829413A
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- measuring
- hole
- sediment
- hammer
- roller
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- 239000013049 sediment Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention provides a device and a method for detecting the thickness of sediment at the hole bottom of a drilled pile, wherein the device comprises a cross beam, one end of the cross beam is provided with a bracket, the bracket is provided with a roller, and the roller is wound with two measuring ropes; the cross beam is also connected with two support rods, and the front ends of the two support rods respectively extend outwards in an inclined manner towards the two sides of the cross beam; the front end of each supporting rod is provided with a through hole, the front ends of the two measuring ropes respectively penetrate through the through holes at the front ends of the two supporting rods and are respectively connected with different measuring hammers, one measuring hammer is used for detecting the elevation of the top surface of the sediment, the other measuring hammer is used for detecting the elevation of the bottom of the hole, the two measuring hammers are simultaneously lowered into the hole through the operation roller, and the thickness of the sediment at the bottom of the hole is measured by calculating the difference between the elevation of the top surface of the sediment and the elevation of the bottom of the. The invention can ensure the safety of constructors, improve the detection efficiency and ensure the accurate detection result.
Description
Technical Field
The invention relates to the field of drilling construction of bridge pile foundations, in particular to a device and a method for detecting the thickness of hole bottom sediments after drilling of drilled piles is completed.
Background
After the pile foundation is drilled and formed, whether the sediment thickness at the bottom of the hole meets the standard requirement needs to be detected. The existing method is to bind a section of steel bar at the end of a measuring rope, a detector holds the other end of the measuring rope to slowly lower the steel bar into a hole, when the steel bar contacts the top surface of the sediment, the length of the measuring rope is recorded, the measuring rope is continuously lowered, when the steel bar passes through the sediment and reaches the bottom of the hole, the length of the measuring rope is observed again, and the thickness of the sediment is obtained by calculating the difference between the lengths of the measuring ropes on two sides. In the testing process, need set up the platform and supply the operation of the handheld measuring rope in drill way top for the testing personnel, there is certain potential safety hazard, moreover because there is mud in the hole, whether the reinforcing bar contacts the sediment top surface can only be judged through operating personnel's experience, therefore the sediment thickness that records often is inaccurate.
Disclosure of Invention
The invention aims to solve the problems and provides a device and a method for detecting the thickness of the sediment at the hole bottom of a drilled pile, so as to improve the accuracy of the detection of the sediment at the hole bottom and ensure the safety of constructors.
The technical scheme of the invention is as follows:
the utility model provides a drilling pile hole bottom sediment thickness detection device which characterized in that: the pile support structure comprises a cross beam, wherein the length of the cross beam is larger than the diameter of a pile hole, one end of the cross beam is fixedly provided with a support, the support is provided with a roller, two sides of the support are respectively provided with a support plate, two ends of a rotating shaft of the roller are respectively supported on the two support plates, and one end of the rotating shaft of the roller is provided with a rotating handle; the middle of the roller is provided with an annular partition plate which divides the surface of the roller into two parts, and each part is wound with a measuring rope with the length larger than the depth of the pile hole; the cross beam is connected with two support rods, the rear ends of the two support rods are fixed on the cross beam close to the mounting position of the support, each support rod has an acute included angle with two sides of the cross beam, and the front ends of the two support rods extend obliquely outwards to two sides of the cross beam; the front end of each supporting rod is provided with a vertical through hole, the front ends of two measuring ropes on the roller respectively pass through the through holes at the front ends of the two supporting rods and then droop, the front end of one measuring rope is connected with an A-shaped measuring hammer, and the lower end of the A-shaped measuring hammer is provided with a conical tip; the front end of the other measuring rope is connected with a B-shaped measuring hammer, and the bottom of the B-shaped measuring hammer is a flat plate; the bottom heights of the A-type measuring hammer and the B-type measuring hammer are consistent.
The method for detecting the thickness of the sediment at the bottom of the hole by adopting the device for detecting the thickness of the sediment at the bottom of the hole of the drilled pile is characterized by comprising the following steps of:
(1) the beam stretches over the pile hole, the roller is rotated by rotating the handle, the measuring rope is loosened, and the A-type measuring hammer and the B-type measuring hammer are slowly lowered into the pile hole;
(2) observing the state of the measuring rope connecting the two measuring hammers, wherein the two measuring ropes are in a tensioned state at the beginning, when the measuring rope connecting the B-shaped measuring hammer just reaches a loose state, the B-shaped measuring hammer is proved to be in contact with the top surface of the sediment, and recording the scales on the two measuring ropes at the moment, wherein the scales are the elevation of the top surface of the sediment at the bottom of the hole;
(3) continuing to rotate the roller to lower the measuring rope, when the measuring rope connected with the A-shaped measuring hammer just reaches a loose state, indicating that the A-shaped measuring hammer passes through the sediment and contacts the bottom of the hole, and recording the scale of the measuring rope connected with the A-shaped measuring hammer at the moment, wherein the scale is the elevation of the bottom of the hole;
(4) and calculating the difference between the elevation of the hole bottom and the elevation of the sediment top surface to obtain the thickness of the sediment at the hole bottom.
According to the invention, the measuring rope is arranged below the roller, so that a detector can operate the measuring rope to be lowered at a certain distance outside the hole, and the construction safety can be ensured; two different measuring hammers are suspended by the two measuring ropes, the elevation of the top and the bottom of the sediment is respectively detected, the detection efficiency is high, and the detection result is accurate.
Drawings
FIG. 1 is a schematic structural view of one side of a device for detecting the thickness of the sediment at the bottom of a hole of a bored pile;
FIG. 2 is another schematic structural view of the device for detecting the thickness of the sediment at the bottom of the hole of the bored pile;
FIG. 3 is a schematic structural diagram of a drilling pile hole bottom sediment thickness detection device in a top view;
FIG. 4 is a schematic view showing a state that a B-type measuring hammer reaches the top surface of a sediment layer when the sediment thickness at the bottom of a hole of a bored pile is detected;
FIG. 5 is a schematic view showing a state that an A-type measuring hammer penetrates through sediment to reach the bottom of a hole when the thickness of the sediment at the bottom of the hole of the drilled pile is detected;
Detailed Description
As shown in fig. 1, 2 and 3, the device for detecting the thickness of the sediment at the bottom of the hole of the drilled pile comprises a beam 1 with the length larger than the diameter of the pile hole, wherein one end of the beam 1 is fixedly provided with a bracket 2 through a bolt, the bracket is provided with a roller 3, two sides of the bracket are respectively provided with a support plate 4, two ends of a rotating shaft of the roller 3 respectively penetrate through the two support plates, the two support plates are supported on the two support plates and can rotate on the support plates, and one end of the rotating shaft of the roller is provided with a rotating handle 5; the middle of the roller is provided with an annular partition plate 6 which divides the surface of the roller into two parts, and each part is wound with a measuring rope 7 with the length larger than the depth of the pile hole; the cross beam 1 is connected with two support rods 8, the rear ends of the two support rods 8 are fixed on the cross beam 1 close to the support mounting position through bolts, each support rod 8 forms an acute included angle with two sides of the cross beam 1, and the front ends of the two support rods 8 extend outwards in an inclined mode towards two sides of the cross beam 1; the front end of each supporting rod is provided with a vertical through hole 9, the front ends of two measuring ropes 7 on the roller respectively pass through the through holes at the front ends of the two supporting rods 8 and then droop, the front end of one measuring rope is connected with an A-shaped measuring hammer 10, and the lower end of the A-shaped measuring hammer 10 is provided with a conical tip; the front end of the other measuring rope is connected with a B-shaped measuring hammer 11, and the bottom of the B-shaped measuring hammer 11 is a flat plate; the bottom heights of the A-type measuring hammer 10 and the B-type measuring hammer 11 are consistent, and the weights of the A-type measuring hammer and the B-type measuring hammer are all larger than the buoyancy of mud in a hole.
In the specific implementation of the invention, in order to ensure the construction safety and facilitate the detection of the sediment thickness at different positions in the pile hole, the length of the cross beam 1 is preferably set to be not less than 1.5 times of the diameter of the pile hole, and the length of each support rod 8 is not less than the radius of the pile hole.
The A-shaped measuring hammer 10 is used for measuring elevation of a hole bottom and is inserted into the hole bottom through a hole bottom sediment layer. During specific implementation, the steel bar can be used for manufacturing, the upper end of the steel bar is provided with a lifting lug and connected with the measuring rope, and the lower end of the steel bar is conical.
The B-type measuring hammer 11 is used for measuring the height level of the sediment and can stop not sinking on the top surface of the sediment layer. During specific implementation, a connecting rod 111 which is vertically arranged can be adopted, a lifting lug is arranged at the upper end of the connecting rod and is connected with the measuring rope, and the lower end of the connecting rod is welded with the middle of a steel plate 112 which is horizontally arranged. The steel plate 112 is of sufficient area to be restrained from stopping on top of the sediment layer.
As shown in fig. 4 and 5, when the device for detecting the thickness of the sediment at the bottom of the hole of the bored pile is used for detecting the thickness of the sediment at the bottom of the hole, the specific method is as follows:
(1) the beam 1 is spanned above the pile hole 12, the beam is moved to enable the measuring hammer to be aligned above the position of the sediment to be detected in the pile hole, and the roller 3 is ensured to have enough safety distance from the hole opening; an operator rotates the roller by rotating the handle, and releases the measuring rope 7 to slowly lower the A-type measuring hammer and the B-type measuring hammer into the pile hole at the same time;
(2) observing the state of the measuring rope 7 connecting the two measuring hammers, wherein the two measuring ropes are in a tightened state at the beginning, when the measuring rope connecting the B-type measuring hammer just reaches a loosened state, the B-type measuring hammer 11 is proved to be in contact with the top surface of the sediment layer 13, and recording the scales on the two measuring ropes at the moment, wherein the scales are the elevation of the top surface of the sediment at the bottom of the hole;
(3) continuing to rotate the roller to lower the measuring rope 7, when the measuring rope connected with the A-shaped measuring hammer just reaches a loose state, indicating that the A-shaped measuring hammer 10 penetrates through the slag layer 13 to contact the bottom of the hole at the moment, and recording the scale of the measuring rope connected with the A-shaped measuring hammer at the moment, wherein the scale is the elevation of the bottom of the hole;
(4) and calculating the difference between the elevation of the hole bottom and the elevation of the sediment top surface to obtain the thickness of the sediment at the hole bottom.
Claims (5)
1. The utility model provides a drilling pile hole bottom sediment thickness detection device which characterized in that: the pile support structure comprises a cross beam, wherein the length of the cross beam is larger than the diameter of a pile hole, one end of the cross beam is fixedly provided with a support, the support is provided with a roller, two sides of the support are respectively provided with a support plate, two ends of a rotating shaft of the roller are respectively supported on the two support plates, and one end of the rotating shaft of the roller is provided with a rotating handle; the middle of the roller is provided with an annular partition plate which divides the surface of the roller into two parts, and each part is wound with a measuring rope with the length larger than the depth of the pile hole; the cross beam is connected with two support rods, the rear ends of the two support rods are fixed on the cross beam close to the mounting position of the support, each support rod has an acute included angle with two sides of the cross beam, and the front ends of the two support rods extend obliquely outwards to two sides of the cross beam; the front end of each supporting rod is provided with a vertical through hole, the front ends of two measuring ropes on the roller respectively pass through the through holes at the front ends of the two supporting rods and then droop, the front end of one measuring rope is connected with an A-shaped measuring hammer, and the lower end of the A-shaped measuring hammer is provided with a conical tip; the front end of the other measuring rope is connected with a B-shaped measuring hammer, and the bottom of the B-shaped measuring hammer is a flat plate; the bottom heights of the A-type measuring hammer and the B-type measuring hammer are consistent.
2. The device for detecting the thickness of the sediment at the bottom of the hole of the drilled pile according to claim 1, characterized in that: the length of the cross beam is not less than 1.5 times of the diameter of the pile hole, and the length of each supporting rod is not less than the radius of the pile hole.
3. The device for detecting the thickness of the sediment at the bottom of the hole of the drilled pile according to claim 1, characterized in that: the A-shaped measuring hammer is made of a steel bar, a lifting lug is arranged at the upper end of the A-shaped measuring hammer and connected with the measuring rope, and the lower end of the A-shaped measuring hammer is conical.
4. The device for detecting the thickness of the sediment at the bottom of the hole of the drilled pile according to claim 1, characterized in that: the B-shaped measuring hammer comprises a vertically arranged connecting rod, a lifting lug is arranged at the upper end of the connecting rod and is connected with the measuring rope, and the lower end of the connecting rod is welded with the middle of a horizontally arranged steel plate.
5. A method for detecting the thickness of the sediment at the bottom of the hole by adopting the device for detecting the thickness of the sediment at the bottom of the hole of the bored pile in claim 1 is characterized in that:
(1) the beam stretches over the pile hole, the roller is rotated by rotating the handle, the measuring rope is loosened, and the A-type measuring hammer and the B-type measuring hammer are slowly lowered into the pile hole;
(2) observing the state of the measuring rope connecting the two measuring hammers, wherein the two measuring ropes are in a tensioned state at the beginning, when the measuring rope connecting the B-shaped measuring hammer just reaches a loose state, the B-shaped measuring hammer is proved to be in contact with the top surface of the sediment, and recording the scales on the two measuring ropes at the moment, wherein the scales are the elevation of the top surface of the sediment at the bottom of the hole;
(3) continuing to rotate the roller to lower the measuring rope, when the measuring rope connected with the A-shaped measuring hammer just reaches a loose state, indicating that the A-shaped measuring hammer passes through the sediment and contacts the bottom of the hole, and recording the scale of the measuring rope connected with the A-shaped measuring hammer at the moment, wherein the scale is the elevation of the bottom of the hole;
(4) and calculating the difference between the elevation of the hole bottom and the elevation of the sediment top surface to obtain the thickness of the sediment at the hole bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010637726.1A CN111829413A (en) | 2020-07-05 | 2020-07-05 | Device and method for detecting thickness of sediment at hole bottom of drilled pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010637726.1A CN111829413A (en) | 2020-07-05 | 2020-07-05 | Device and method for detecting thickness of sediment at hole bottom of drilled pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111829413A true CN111829413A (en) | 2020-10-27 |
Family
ID=72900152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010637726.1A Withdrawn CN111829413A (en) | 2020-07-05 | 2020-07-05 | Device and method for detecting thickness of sediment at hole bottom of drilled pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111829413A (en) |
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2020
- 2020-07-05 CN CN202010637726.1A patent/CN111829413A/en not_active Withdrawn
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| PB01 | Publication | ||
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Application publication date: 20201027 |