CN110106924B - Pile soil plug height monitoring device and method in pile sinking process - Google Patents
Pile soil plug height monitoring device and method in pile sinking process Download PDFInfo
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- CN110106924B CN110106924B CN201910303686.4A CN201910303686A CN110106924B CN 110106924 B CN110106924 B CN 110106924B CN 201910303686 A CN201910303686 A CN 201910303686A CN 110106924 B CN110106924 B CN 110106924B
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- 239000002689 soil Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000012806 monitoring device Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims abstract description 10
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- 238000006243 chemical reaction Methods 0.000 description 2
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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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- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention provides a pile soil plug height monitoring device and a pile soil plug height monitoring method in a pile sinking process, wherein the pile soil plug height monitoring device comprises the following steps: the device comprises a first fixed pulley with an encoder, a second fixed pulley with an encoder, a first electric winch, a second electric winch, an encoder acquisition and winch control integrated machine, a computer, a first steel wire rope, a second steel wire rope, a first fixed pulley, a second fixed pulley, a first support, a second support and a heavy ball, wherein the first fixed pulley with the encoder and the second fixed pulley with the encoder record the number of turns of the self-rotation and transmit data information to the encoder acquisition and winch control integrated machine, the encoder acquisition and winch control integrated machine acquires and transmits the number of turns of the rotating turns to the computer to be converted into the winding and unwinding length of the steel wire rope, and the first electric winch and the second electric winch are controlled to wind and unwind the steel wire rope according to the converted length. The device and the method solve the problems that the existing soil plug height measuring device and method are difficult to adapt to the working condition of the marine pile sinking, the safety risk is high and the like.
Description
Technical Field
The invention relates to the technical field of ocean geotechnical engineering and pile foundation engineering, in particular to a device and a method for monitoring the soil plug height of a tubular pile in real time in a pile sinking process.
Background
Steel pipe piles and concrete pipe piles are a common pile foundation form, and in the pile sinking process of open-ended and partially-opened pipe piles, a part of pile end soil enters the pile to form a soil plug. The blocking effect of the pipe pile caused by the soil plug has remarkable influence on the pile sinking process, and plays a key role in the bearing performance of the pipe pile after pile sinking. Therefore, the research on the formation process of the soil plug in the pipe pile (the rule that the soil plug height changes along with the pile penetration depth) has important significance for the prediction of pile sinking feasibility of the pipe pile, the selection of pile sinking parameters and the analysis of bearing characteristics.
Existing methods for measuring the height of a soil plug can be divided into two types: one is to measure the depth of the soil plug directly at the pipe pile mouth after pile driving is stopped so as to calculate the height of the soil plug; and the other is to open holes on the side wall of the tubular pile, and directly measure the depth of the soil plug by placing a measuring rope so as to calculate the height of the soil plug. Because the pile sinking process is generally continuous, the first method cannot obtain the soil plug height change condition in the pile sinking process, and the second method can be used for monitoring the soil plug height change in the pile sinking process in principle, but a platform needs to be erected in advance for measuring and reading near the side wall opening, so that the automation degree is low, the safety risk is high, and the pile sinking method is difficult to operate when piling on the sea, and particularly when piling by adopting a hanging hammer.
With the continuous development and utilization of ocean resources, ultra-long large pipe piles are more applied to ocean engineering, research on the problem of pipe pile soil plugs is more and more necessary, and a device and a method applicable to real-time monitoring of the soil plug height in the pile sinking process of the offshore pipe piles are needed to be provided.
Disclosure of Invention
The invention aims to provide a device and a method for monitoring the height of a soil plug in real time, which can be applied to an engineering site, are simple, convenient and easy to operate, so as to effectively solve the problems that the existing device and method for measuring the height of the soil plug are difficult to be suitable for the working condition of a pile sinking at sea, have high safety risk and the like.
In order to achieve the above object, the present invention provides a pile soil plug height monitoring device in pile sinking process, comprising: the first fixed pulley with the encoder, the second fixed pulley with the encoder, the first electric winch, the second electric winch, the encoder acquisition and winch control integrated machine, the computer, the first steel wire rope, the second steel wire rope, the first fixed pulley, the second fixed pulley, the first bracket, the second bracket and the heavy ball,
the first fixed pulley with the encoder and the second fixed pulley with the encoder are erected in the same vertical plane of the monitoring platform at the same outer side of the tubular pile to be tested and are erected at the same height; the first fixed pulley and the second fixed pulley are respectively arranged in and outside the wall of the reserved hole of the tubular pile to be tested and are identical in arrangement height; naturally hanging a heavy ball in a pile hole of the pipe pile to be tested to the mud surface in the pipe, wherein the heavy ball is connected with the first steel wire rope and the second steel wire rope; the first steel wire rope sequentially bypasses the first fixed pulley, the second fixed pulley and the first fixed pulley with the encoder and then is connected with the first electric winch; the second steel wire rope sequentially bypasses the first fixed pulley, the second fixed pulley and the second fixed pulley with the encoder and is connected with a second electric winch; the first fixed pulley with the encoder, the second fixed pulley with the encoder, the first electric winch and the second electric winch are all connected to the encoder collection and winch control integrated machine through circuits, the encoder collection and winch control integrated machine is connected with a computer, the first fixed pulley with the encoder and the second fixed pulley with the encoder record the number of turns of rotation of the first fixed pulley with the encoder and transmit data information to the encoder collection and winch control integrated machine, the encoder collection and winch control integrated machine collects the number of turns of rotation and transmits the number of turns to the computer to be converted into a wire rope collection and release length, and the first electric winch and the second electric winch are controlled to collect and release the wire rope according to the converted length.
Specifically, the first fixed pulley and the second fixed pulley are respectively installed and fixed on the wall of the reserved hole of the tubular pile to be tested through the first bracket and the second bracket.
Preferably, the first electric winch, the second electric winch, the encoder acquisition and winch control integrated machine and the computer are all arranged on the monitoring platform.
It is another object of the present invention to provide a method for monitoring the pile soil plug height during pile sinking.
In order to achieve the above purpose, the invention provides a pile soil plug height monitoring method in pile sinking process, which comprises the following steps:
s1, before piling begins, assembling the pile soil plug height monitoring device in the pile sinking process according to any one of claims 1-3, controlling the first winch and the second winch to be retracted and released, enabling the first steel wire rope and the second steel wire rope to be kept in a tight state, and calculating the length of the steel wire rope from the fixed pulley with the encoder to the heavy ball as an initial length according to the total length of the steel wire rope which is not wound into the winch and the length of the steel wire rope from the fixed pulley with the encoder to the winch;
s2, measuring and recording the following data: horizontal distance l between fixed pulley of first belt encoder and tubular pile to be tested 1 Horizontal distance l between second fixed pulley with encoder and tubular pile to be tested 2 Horizontal distance l between second fixed pulley and wall of preformed hole of tubular pile to be tested 3 Horizontal distance l between first fixed pulley and wall of reserved hole of tubular pile to be tested 4 Vertical distance h between first belt encoder fixed pulley and monitoring platform 3 Monitoring the vertical distance d between the platform and the mud surface W Vertical distance LP between first fixed pulley and tubular pile top to be measured 1 The length LP of the tubular pile to be measured;
s3, after the position data is recorded, resetting the encoder, and preparing for piling;
s4, piling is started, the open tubular pile is driven into the soil to form a soil plug, the heavy ball is lifted and then the first electric winch and the second electric winch are controlled by the encoder to wind the steel wire rope and record the winding length through the winch control integrated machine and the computer, and the winding length is subtracted from the initial length to obtain the length y from the current first fixed pulley with the encoder and the second fixed pulley with the encoder to the steel wire rope of the heavy ball 1 Y 2 The method comprises the steps of carrying out a first treatment on the surface of the Finding the height h from the first fixed pulley to the heavy ball 1 And the vertical distance from the first top pulley to the first fixed pulley with the encoder is h 2 ，
b 1 ＝(l 1 -l 3 ) 2 ，b 2 ＝(l 2 -l 3 ) 2 ，b 3 ＝(y 1 -y 2 ) 2 ；
S5, calculating the soil plug height and the pipe pile soil penetration depth at the current moment: soil plug height = LP-LP 1 -h 1 Pile penetration = LP-LP 1 -h 2 -h 3 -d W 。
The beneficial effects of the invention are as follows:
compared with the prior art, the invention can rapidly monitor the change condition of the soil plug height along with the pile penetration depth in the pile sinking process of the tubular pile in real time, and has the advantages of wide application range, simple operation, high automation degree and small safety risk.
Drawings
FIG. 1 is a schematic view of a pile soil plug height monitoring device in the pile sinking process.
Fig. 2 is a schematic diagram of the parameter values of the pile soil plug height monitoring device in the pile sinking process.
1. The first fixed pulley with the encoder, the second fixed pulley with the encoder, the first electric winch, the second electric winch, the lead, the encoder acquisition and winch control all-in-one machine, the computer, 8, a first steel wire rope, 9, a second steel wire rope, 10, a first fixed pulley, 11, a second fixed pulley, 12, a first bracket, 13, a second bracket, 14, a heavy ball, 15, a monitoring platform, 16, a pipe pile, 17, a soil plug, 18, a mud surface,
l 1 horizontal distance l between fixed pulley 1 of first belt encoder and tubular pile 16 2 The second fixed pulley 2 with encoder is horizontally away from the tubular pile 16, c 1 Second fixed pulley 11 and first belt codeDistance c of fixed pulley 1 2 Distance l between the second fixed pulley 11 and the second fixed pulley 2 with encoder 3 Horizontal distance l between the second fixed pulley 11 and the tubular pile 16 4 Horizontal distance h between first fixed pulley 10 and tubular pile 16 1 The first fixed pulley 10 is at a vertical distance h from the heavy ball 14 2 The first fixed pulley 10 is at a vertical distance h from the first encoder fixed pulley 1 3 The vertical distance d between the first fixed pulley 1 with encoder and the monitoring platform 15 W Monitoring the vertical distance between the platform 15 and the mud surface 18, LP 1 The first fixed sheave 10 is vertically spaced from the top of the tube stake 16, LP. the length of the tube stake 16.
Detailed Description
In order to make the technical features, objects and effects of the present invention more clearly and intuitively known, a detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, in the pile sinking process of the present invention, the pile soil plug height monitoring device comprises a first fixed pulley with encoder 1, a second fixed pulley with encoder 2, a first electric winch 3, a second electric winch 4, an encoder acquisition and winch control integrated machine 6, a computer 7, a first steel wire rope 8, a second steel wire rope 9, a first fixed pulley 10, a second fixed pulley 11, a first bracket 12, a second bracket 13, a heavy ball 14, etc.
The outside of the tubular pile to be tested is provided with a monitoring platform, and the monitoring platform is provided with a first fixed pulley 1 with an encoder, a second fixed pulley 2 with an encoder, a first electric winch 3, a second electric winch 4, an encoder acquisition and winch control integrated machine 6 and a computer 7. The first fixed pulley with the encoder 1 and the second fixed pulley with the encoder 2 are positioned in the same vertical plane on the same side of the tubular pile to be tested, and the erection heights of the fixed pulleys with the encoder 1 and the second fixed pulley with the encoder are the same. The inner side and the outer side of the wall of the reserved hole of the tubular pile to be tested are respectively fixed with a first bracket 12 and a second bracket 13, and the first fixed pulley 10 and the second fixed pulley 11 are respectively installed and fixed on the wall of the reserved hole of the tubular pile to be tested through the first bracket 12 and the second bracket 13, and are identical in setting height. Naturally hanging the heavy ball 14 in a pile hole of the pipe pile to be tested to the mud surface in the pipe, wherein the heavy ball 14 is connected with the first steel wire rope and the second steel wire rope; the first steel wire rope sequentially bypasses the first fixed pulley 10, the second fixed pulley 11 and the first encoder fixed pulley 1 and then is connected with the first electric winch 3; the second steel wire rope sequentially bypasses the first fixed pulley 10, the second fixed pulley 11 and the second fixed pulley with encoder 2 and then is connected with the second electric hoist 4; the first fixed pulley with encoder 1, the second fixed pulley with encoder 2, the first electric hoist 3, the second electric hoist 4 all circuit connection is to encoder collection and hoist control all-in-one 6, encoder collection and hoist control all-in-one 6 is connected with computer 7, first fixed pulley with encoder and second fixed pulley with encoder record self pivoted number of turns and with data information transfer to encoder collection and hoist control all-in-one, encoder collection and hoist control all-in-one is with pivoted number of turns collection and transmission to the computer conversion into wire rope receive and release length to control first electric hoist and second electric hoist receive and release wire rope according to the length that the conversion obtained.
The monitoring method of the invention comprises the following steps:
s1, before piling, assembling the pile soil plug height monitoring device in the pile sinking process: the first fixed pulley with the encoder 1 and the second fixed pulley with the encoder 2 are erected on a monitoring platform 15 and are respectively connected with an encoder acquisition and winch control integrated machine 6 through a lead 5; the first electric winch 3 and the second electric winch 4 are connected with the encoder acquisition and winch control integrated machine 6 through a lead 5; the encoder acquisition and winch control integrated machine 6 is connected with the computer 7 through a lead 5; the first fixed pulley 10 and the second fixed pulley 11 are respectively arranged and fixed on the inner wall and the outer wall of a reserved hole of the tubular pile 16 through a first bracket 12 and a second bracket 13; connecting the heavy ball 14 with one ends of the first steel wire rope 8 and the second steel wire rope 9, placing the heavy ball in a reserved hole of the tubular pile 16 and naturally hanging the heavy ball on the mud surface in the tubular pile; the two steel wire ropes sequentially pass through the first fixed pulley 10 and the second fixed pulley 11, then respectively pass through the first fixed pulley with encoder 1 and the second fixed pulley with encoder 2 and are respectively connected with the first electric hoist 3 and the second electric hoist 4. The winding and unwinding of the winding machine is controlled, so that the two steel wire ropes are kept in a tight state. And calculating the length of the steel wire rope from the fixed pulley with the encoder to the heavy ball as an initial length according to the total length of the steel wire rope which is not wound into the winch and the length of the steel wire rope from the fixed pulley with the encoder to the winch.
S2, measuring and recording the following data by using a ruler: horizontal distance l between fixed pulley 1 of first belt encoder and tubular pile 16 1 Horizontal distance l between second fixed pulley 2 with encoder and tubular pile 16 2 Horizontal distance l between second fixed pulley 11 and tubular pile 16 3 Horizontal distance l between first fixed pulley 10 and tubular pile 16 4 Vertical distance h between first belt encoder fixed pulley 1 and monitoring platform 15 3 The vertical distance d between the monitoring platform 15 and the mud surface 18 W Vertical distance LP between first fixed sheave 10 and top of pipe pile 16 1 The tube stake 16 is of length LP.
S3, after the position data is recorded, resetting the encoder, and preparing for piling.
S4, piling is started, the pipe pile 16 is driven into the soil, a soil plug 17 is formed, and the heavy ball 14 is lifted. The electric hoist is controlled to wind the steel wire rope through the encoder collection and hoist control integrated machine 6 and the computer 7, the winding length is recorded, and the initial length is subtracted by the winding length, namely the length of the steel wire rope from the current fixed pulley with the encoder to the heavy ball. The lengths of the steel wire ropes from the first fixed pulley with the encoder to the heavy ball and the second fixed pulley with the encoder are respectively y 1 、y 2 . The height from the first fixed pulley 12 to the heavy ball 14 is h 1 And the vertical distance from the first top pulley 12 to the first encoder crown block 1 is h 2 The method can be calculated as follows:
b 1 ＝(l 1 -l 3 ) 2 ，b 2 ＝(l 2 -l 3 ) 2 ，b 3 ＝(y 1 -y 2 ) 2 。
s5, calculating the height of the soil plug 17 and the depth of the pipe pile 16 into the soil at the current moment:
soil plug height = LP-LP 1 -h 1 ，
Pile penetration depth = LP-LP 1 -h 2 -h 3 -d W 。
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (2)
1. Pile soil plug height monitoring device in pile sinking process, its characterized in that includes: the first fixed pulley with the encoder, the second fixed pulley with the encoder, the first electric winch, the second electric winch, the encoder acquisition and winch control integrated machine, the computer, the first steel wire rope, the second steel wire rope, the first fixed pulley, the second fixed pulley, the first bracket, the second bracket and the heavy ball,
the first fixed pulley with the encoder and the second fixed pulley with the encoder are erected in the same vertical plane of the monitoring platform at the same outer side of the tubular pile to be tested and are erected at the same height; the first fixed pulley and the second fixed pulley are respectively arranged in and outside the wall of the reserved hole of the tubular pile to be tested and are identical in arrangement height; naturally hanging a heavy ball in a pile hole of the pipe pile to be tested to the mud surface in the pipe, wherein the heavy ball is connected with the first steel wire rope and the second steel wire rope; the first steel wire rope sequentially bypasses the first fixed pulley, the second fixed pulley and the first fixed pulley with the encoder and then is connected with the first electric winch; the second steel wire rope sequentially bypasses the first fixed pulley, the second fixed pulley and the second fixed pulley with the encoder and is connected with a second electric winch; the first fixed pulley with the encoder, the second fixed pulley with the encoder, the first electric winch and the second electric winch are all connected to the encoder acquisition and winch control integrated machine in a circuit mode, the encoder acquisition and winch control integrated machine is connected with a computer, the first fixed pulley with the encoder and the second fixed pulley with the encoder record the number of turns of rotation of the first fixed pulley with the encoder and transmit data information to the encoder acquisition and winch control integrated machine, the encoder acquisition and winch control integrated machine acquires the number of turns of rotation and transmits the number of turns to the computer to be converted into a wire rope winding and unwinding length, and the first electric winch and the second electric winch are controlled to wind and unwind the wire rope according to the converted length; the first fixed pulley and the second fixed pulley are respectively fixed on the wall of the reserved hole of the tubular pile to be tested through a first bracket and a second bracket, and the first electric winch, the second electric winch, the encoder acquisition and winch control integrated machine and the computer are all arranged on the monitoring platform.
2. The method for monitoring the soil plug height of the tubular pile in the pile sinking process is characterized by comprising the following steps of:
s1, before piling begins, assembling the pile soil plug height monitoring device in the pile sinking process according to claim 1, controlling the first winch and the second winch to be retracted, enabling the first steel wire rope and the second steel wire rope to be kept in a tense state, and calculating the length of the steel wire rope from the fixed pulley with the encoder to the heavy ball as an initial length according to the total length of the steel wire rope which is not retracted into the winch and the length of the steel wire rope from the fixed pulley with the encoder to the winch;
s2, measuring and recording the following data: horizontal distance l between fixed pulley of first belt encoder and tubular pile to be tested 1 Horizontal distance l between second fixed pulley with encoder and tubular pile to be tested 2 Horizontal distance l between second fixed pulley and wall of preformed hole of tubular pile to be tested 3 Horizontal distance l between first fixed pulley and wall of reserved hole of tubular pile to be tested 4 Vertical distance h between first belt encoder fixed pulley and monitoring platform 3 Monitoring the vertical distance d between the platform and the mud surface W Vertical distance LP between first fixed pulley and tubular pile top to be measured 1 The length LP of the tubular pile to be measured;
s3, after the position data is recorded, resetting the encoder, and preparing for piling;
s4, piling is started, the open tubular pile is driven into the soil to form a soil plug, the heavy ball is collected through the encoder and the winch control integrated machine after being lifted, the first electric winch and the second electric winch are controlled by the computer to wind the steel wire rope and record the winding length, and the winding length is subtracted from the initial length to obtain the current first belt braidingEncoder fixed pulley and length y of steel wire rope from encoder fixed pulley to heavy ball 1 Y 2 The method comprises the steps of carrying out a first treatment on the surface of the Finding the height h from the first fixed pulley to the heavy ball 1 And the vertical distance from the first top pulley to the first fixed pulley with the encoder is h 2 ，
b 1 ＝(l 1 -l 3 ) 2 ，b 2 ＝(l 2 -l 3 ) 2 ，b 3 ＝(y 1 -y 2 ) 2 ；
S5, calculating the soil plug height and the pipe pile soil penetration depth at the current moment: soil plug height = LP-LP 1 -h 1 Pile penetration = LP-LP 1 -h 2 -h 3 -d W 。
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| CN113466228A (en) * | 2021-06-28 | 2021-10-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Method for detecting quality of lower part of mud surface of in-service pipe pile |
| CN114991144B (en) * | 2022-07-08 | 2023-12-08 | 邵良荣 | Carrier pile automatic construction equipment |
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| JP2006097398A (en) * | 2004-09-30 | 2006-04-13 | Ube Concrete Kogyo Kk | Depth measuring device for pile driver |
| CN102587423A (en) * | 2012-03-02 | 2012-07-18 | 中国石油大学(华东) | Depth testing device for driven type soil plugs of steel pipe piles of ocean platforms |
| CN206223261U (en) * | 2016-07-27 | 2017-06-06 | 博广环保技术股份有限公司 | Novel material position detecting system |
| CN207295797U (en) * | 2017-10-24 | 2018-05-01 | 阳光学院 | Driving into type steel-pipe pile soil plug depth measurement device |
| CN210315693U (en) * | 2019-04-16 | 2020-04-14 | 中交四航工程研究院有限公司 | Pile sinking process pipe pile soil plug height monitoring device |
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- 2019-04-16 CN CN201910303686.4A patent/CN110106924B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006097398A (en) * | 2004-09-30 | 2006-04-13 | Ube Concrete Kogyo Kk | Depth measuring device for pile driver |
| CN102587423A (en) * | 2012-03-02 | 2012-07-18 | 中国石油大学(华东) | Depth testing device for driven type soil plugs of steel pipe piles of ocean platforms |
| CN206223261U (en) * | 2016-07-27 | 2017-06-06 | 博广环保技术股份有限公司 | Novel material position detecting system |
| CN207295797U (en) * | 2017-10-24 | 2018-05-01 | 阳光学院 | Driving into type steel-pipe pile soil plug depth measurement device |
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