CN108532653B - Portable bored pile hole depth and mud specific gravity method - Google Patents
Portable bored pile hole depth and mud specific gravity method Download PDFInfo
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- CN108532653B CN108532653B CN201810378485.6A CN201810378485A CN108532653B CN 108532653 B CN108532653 B CN 108532653B CN 201810378485 A CN201810378485 A CN 201810378485A CN 108532653 B CN108532653 B CN 108532653B
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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 provides a portable method for detecting the hole depth and the mud weight of a bored pile, which is characterized by comprising the following steps: the measuring rope is wound on the winch, the measuring rope extending from the winch sequentially bypasses a pulley with an angle dial and a pointer and a pulley with a pressure sensor, and a measuring hammer is hung at the tail end of the measuring rope; the pulley with the angle dial and the pointer is provided with a revolution and pointer angle sensor, and the revolution and pointer angle sensor and the pressure sensor are connected with a computer. The invention can accurately measure the hole depth in real time, simultaneously measure the mud specific gravity of different hole depths and display the mud specific gravity in real time, provides reliable guiding data for the construction of the bored pile, can achieve the purpose of real-time control in the construction process, and saves time and labor.
Description
Technical Field
The invention relates to the field of automatic measurement, in particular to a portable instrument and a method for detecting the hole depth and the mud weight of a bored pile.
Background
Bored piles are widely used as a deep foundation, and the actual drilling depth and the specific gravity of pile hole mud are required to be detected in the construction process so as to achieve the purpose of real-time control. Most of the existing hole depth measurement is manually measured by using a measuring rope, the measurement is mainly based on experience, subjective factors are large, and measurement results are inaccurate. There is currently no accurate measurement of mud weight at different depths in the hole. The invention can accurately measure the hole depth and the mud specific gravity of different hole depths at the same time, and has the advantages of rapidness, convenience, accuracy and the like compared with the prior method.
Disclosure of Invention
The invention provides a portable method for detecting the hole depth and the mud weight of a bored pile, which aims to solve the problems of inaccurate hole depth measurement manhole measurement and long time consumption.
In order to solve the problems, the invention adopts a technical scheme that:
a portable method for detecting the hole depth and the mud weight of a bored pile is characterized by comprising the following steps:
the measuring rope is wound on the winch, the measuring rope extending from the winch sequentially bypasses a pulley with an angle dial and a pointer and a pulley with a pressure sensor, and a measuring hammer is hung at the tail end of the measuring rope;
the pulley with the angle dial and the pointer is provided with a revolution number and pointer angle sensor, and the revolution number and pointer angle sensor and the pressure sensor are connected with a computer;
the winch releases a measuring rope, and the measuring rope is formed by L: measuring elongation of the rope; r: the rotating radius of the pulley with the angle dial and the pointer; n: the number of turns of the pulley with the angle dial and the pointer; alpha: the angle pointed by the pointer; according to the formula:
obtaining an elongation value L of the measuring rope;
when the measuring rope is not added with a measuring hammer and the tail end of the measuring rope is positioned on the surface of slurry, the pressure born by the pulley with the pressure sensor is f 1 Length of the measuring rope entering mud is L 0 The pressure value of the pressure applied is f 2 The method comprises the steps of carrying out a first treatment on the surface of the Then according to the formula:
obtaining the gravity f of the measuring rope in the mud in unit length;
the pressure value of the pulley with the pressure sensor when the measuring hammer is positioned on the surface of the slurry is F 1 The pressure value of the pulley with the pressure sensor when the measuring hammer is completely immersed in the slurry is F 2 The method comprises the steps of carrying out a first treatment on the surface of the g: acceleration of gravity; v: measuring the volume of the hammer;
then according to the formula:
obtaining the mud specific gravity gamma of the position where the measuring hammer is positioned;
drawing a gamma-L curve in real time from the moment that the measuring hammer is positioned on the surface of slurry, recording the elongation value of the measuring rope as L when the measuring hammer is about to enter sediment when the slope of the curve starts to change 1 When the slope of the gamma-L curve becomes 0, the measuring hammer reaches the bottom of the drilled hole, and the elongation value of the measuring rope is recorded as L 2 ；
Obtaining the sediment thickness L s The method comprises the following steps:
L s ＝L 2 -L 1
the obtained drilling hole depth d is as follows:
d＝L 2
thereby obtaining the mud specific gravity gamma of the position where the measuring hammer is positioned; thickness of sediment L s The method comprises the steps of carrying out a first treatment on the surface of the Drilling a hole depth d.
The beneficial effects of the invention are as follows:
the invention can accurately measure the hole depth in real time, simultaneously measure the mud specific gravity of different hole depths and display the mud specific gravity in real time, provides reliable guiding data for the construction of the bored pile, can achieve the purpose of real-time control in the construction process, and saves time and labor.
Drawings
FIG. 1 is a schematic elevational view of a portable bored pile hole depth and mud weight measuring apparatus according to a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of a portable bored pile hole depth and mud weight detecting instrument for measuring hammer and rope entering mud and sediment.
Detailed Description
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other embodiments may be obtained according to these drawings without inventive effort for a person skilled in the art.
Please refer to fig. 1 and 2:
a, B, C, D, E of fig. 2 is the process of the hammer gradually reaching the bottom of the borehole after entering the borehole.
The invention provides a portable bored pile hole depth and mud specific gravity detection instrument, which comprises a measuring hammer 1 with known mass and volume, a measuring rope 2, a winch 5 for providing power, a pulley 3 with a pressure sensor and a pulley 4 with an angle scale and a pointer.
The measuring rope 2 is wound on the winch 5, the measuring rope 2 extending from the winch 5 sequentially winds around the pulley 4 with an angle dial and a pointer and the pulley 3 with a pressure sensor, and the measuring hammer 1 is hung at the tail end of the measuring rope 2.
The pulley 3 with pressure sensor can calculate the pressure value of the pulley 3 with pressure sensor in real time, and the position of the measuring hammer 1 can be judged by the change of the pressure value
The pulley 4 with the angle dial and the pointer is provided with a revolution and pointer angle sensor, and the revolution and pointer angle sensor and the pressure sensor are connected with a computer 6.
The angle dial with the angle dial and the angle dial of the pulley 4 of the pointer are fixed, the pointer rotates along with the rotation of the pulley, and the revolution and pointer angle sensor can automatically record the number of turns of the rotation of the pulley and the angle pointed by the pointer. The sinking depth of the measuring hammer 1 can be automatically calculated through the over-rotation number and the angle shown by the pointer.
The computer 6 can calculate the mud weight in real time and can draw the weight-depth curve in real time and save it as a data form.
The specific scheme is that the winch 5 releases the measuring rope 2, the measuring rope 2 drives the pulley 4 with the angle dial and the pointer to rotate, the revolution and pointer angle sensor automatically records the rotation number of the pulley 4 with the angle dial and the pointer and the angle pointed by the pointer, and then the calculation formula of the elongation value of the measuring rope 2 is as follows:
wherein:
elongation value of L-measuring rope 2
r-radius of rotation of pulley 4 with angle dial and pointer
n-number of turns of rotation of pulley 4 with angle dial and pointer
Alpha-pointer pointing angle
The weight force f of the measuring rope 2 per unit length in the slurry 10 is measured before the measuring instrument detects. The depth of the hole and the thickness of the sediment are determined according to the buoyancy of the measuring hammer 1 in the mud 10 with different densities.
The measuring method of the gravity f of the measuring rope 2 in the mud 10 in unit length is that when the measuring rope 2 is not provided with the measuring hammer 1 and the tail end of the measuring rope 2 is positioned on the surface of the mud 10, the pressure born by the pulley 3 with the pressure sensor is f 1 Length of rope 2 entering mud 10 is L 0 The pulley 3 with pressure sensor receives a pressure value f 2 Gravity of the measuring rope 2 per unit length in the mud
The method for measuring the mud weight by the detecting instrument is that the pressure value of the pulley 3 with the pressure sensor is F when the measuring hammer 1 is positioned on the surface of the mud 10 1 The pressure value of the pulley 3 with pressure sensor when the measuring hammer 1 is completely immersed in the slurry 10 is F 2 The specific gravity of the mud at the location of the hammer 1 is:
wherein:
slurry specific gravity of gamma-hammer
g-gravity acceleration
V-volume of the hammer
All the above data can be calculated by the revolution number, the pointer angle sensor and the pressure sensor transmitted to the computer 6 in real time.
In the measuring process of the detecting instrument, the computer 6 draws a gamma-L curve in real time from the moment that the measuring hammer is positioned on the surface of slurry, and when the slope of the curve begins to change, the measuring hammer 1 is about to enter the sediment 20 to recordThe elongation value of the lower measuring rope 2 is L 1 When the slope of the gamma-L curve becomes 0, the measuring hammer 1 reaches the bottom of the drilling hole, and the elongation value of the measuring rope 2 is recorded as L 2 。
Thickness of sediment L s The method comprises the following steps:
L s ＝L 2 -L 1
the depth of the drilling hole is d:
d＝L 2
in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A portable method for detecting the hole depth and the mud weight of a bored pile is characterized by comprising the following steps:
the measuring rope is wound on the winch, the measuring rope extending from the winch sequentially bypasses a pulley with an angle dial and a pointer and a pulley with a pressure sensor, and a measuring hammer is hung at the tail end of the measuring rope;
the pulley with the angle dial and the pointer is provided with a revolution number and pointer angle sensor, and the revolution number and pointer angle sensor and the pressure sensor are connected with a computer;
the winch releases a measuring rope, and the measuring rope is formed by L: measuring elongation of the rope; r: the rotating radius of the pulley with the angle dial and the pointer; n: the number of turns of the pulley with the angle dial and the pointer; alpha: the angle pointed by the pointer; according to the formula:
obtaining an elongation value L of the measuring rope;
when the measuring rope is not added with a measuring hammer and the tail end of the measuring rope is positioned on the surface of slurry, the pressure born by the pulley with the pressure sensor is f 1 Length of the measuring rope entering mud is L 0 The pressure value of the pressure applied is f 2 The method comprises the steps of carrying out a first treatment on the surface of the Then according to the formula:
obtaining the gravity f of the measuring rope in the mud in unit length;
the pressure value of the pulley with the pressure sensor when the measuring hammer is positioned on the surface of the slurry is F 1 The pressure value of the pulley with the pressure sensor when the measuring hammer is completely immersed in the slurry is F 2 The method comprises the steps of carrying out a first treatment on the surface of the g: acceleration of gravity; v: measuring the volume of the hammer;
then according to the formula:
obtaining the mud specific gravity gamma of the position where the measuring hammer is positioned;
drawing a gamma-L curve in real time from the moment that the measuring hammer is positioned on the surface of slurry, recording the elongation value of the measuring rope as L when the measuring hammer is about to enter sediment when the slope of the curve starts to change 1 When the slope of the gamma-L curve becomes 0, the measuring hammer reaches the bottom of the drilled hole, and the elongation value of the measuring rope is recorded as L 2 ；
Obtaining the sediment thickness L s The method comprises the following steps:
L s ＝L 2 -L 1
the obtained drilling hole depth d is as follows:
d＝L 2
thereby obtaining the mud specific gravity gamma of the position where the measuring hammer is positioned; thickness of sediment L s The method comprises the steps of carrying out a first treatment on the surface of the Drilling a hole depth d.
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| CN201810378485.6A CN108532653B (en) | 2018-04-25 | 2018-04-25 | Portable bored pile hole depth and mud specific gravity method |
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| CN108532653B true CN108532653B (en) | 2023-10-13 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05222729A (en) * | 1992-02-12 | 1993-08-31 | Takenaka Komuten Co Ltd | Execution method for cast-in-place concrete pile, etc. |
| JPH09203702A (en) * | 1996-01-26 | 1997-08-05 | Tone Chika Gijutsu Kk | Measuring method for slurry physical properties in excavation hole |
| CN102535527A (en) * | 2010-12-14 | 2012-07-04 | 上海市基础工程有限公司 | Testing device and method of breast wall slurry pressure during pore-forming construction of cast-in-situ bored pile |
| CN104018507A (en) * | 2014-06-25 | 2014-09-03 | 中冶集团武汉勘察研究院有限公司 | Underwater cast-in-place concrete pile elevation control device and using method thereof |
| CN205224130U (en) * | 2015-12-27 | 2016-05-11 | 福建省中孚检测技术有限公司 | Shallow soil layer statical head water head test liquid level meter |
| CN106638719A (en) * | 2016-10-20 | 2017-05-10 | 武汉长盛工程检测技术开发有限公司 | Automatic cast-in-place pile quality monitoring and controlling device and method |
-
2018
- 2018-04-25 CN CN201810378485.6A patent/CN108532653B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05222729A (en) * | 1992-02-12 | 1993-08-31 | Takenaka Komuten Co Ltd | Execution method for cast-in-place concrete pile, etc. |
| JPH09203702A (en) * | 1996-01-26 | 1997-08-05 | Tone Chika Gijutsu Kk | Measuring method for slurry physical properties in excavation hole |
| CN102535527A (en) * | 2010-12-14 | 2012-07-04 | 上海市基础工程有限公司 | Testing device and method of breast wall slurry pressure during pore-forming construction of cast-in-situ bored pile |
| CN104018507A (en) * | 2014-06-25 | 2014-09-03 | 中冶集团武汉勘察研究院有限公司 | Underwater cast-in-place concrete pile elevation control device and using method thereof |
| CN205224130U (en) * | 2015-12-27 | 2016-05-11 | 福建省中孚检测技术有限公司 | Shallow soil layer statical head water head test liquid level meter |
| CN106638719A (en) * | 2016-10-20 | 2017-05-10 | 武汉长盛工程检测技术开发有限公司 | Automatic cast-in-place pile quality monitoring and controlling device and method |
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