CN112267499A - Rotary jet grouting pile forming diameter detection device - Google Patents
Rotary jet grouting pile forming diameter detection device Download PDFInfo
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- CN112267499A CN112267499A CN202011286822.2A CN202011286822A CN112267499A CN 112267499 A CN112267499 A CN 112267499A CN 202011286822 A CN202011286822 A CN 202011286822A CN 112267499 A CN112267499 A CN 112267499A
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 15
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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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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- Engineering & Computer Science (AREA)
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- 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 relates to a pile-forming diameter detection device for a jet grouting pile, which comprises a hollow pipe, a vibration sensor and signal processing equipment, wherein the hollow pipe is connected with the vibration sensor; the edge position of the preset pile-forming radius is provided with the hollow pipe parallel to the designed pile body, and the inner wall of the hollow pipe is provided with at least two guide rails in the direction parallel to the axial direction; a plurality of vibration sensors are installed on the guide rail in a hollow pipe at intervals; the vibration sensor is connected with a signal processing device, and the signal processing device is connected with a control system; the vibration sensor is used for detecting vibration parameters of the hollow pipe caused by high-pressure fluid ejected by the drill rod at the position of the middle shaft of the spin jet pile. The invention monitors in real time and can visually judge whether the pile diameter and the pile length meet the design requirements; the pile-forming quality of the pile body with the corresponding height can be obtained. The operation is simple, and the steel pipe and the sensor can be recycled; the detection is carried out in the construction process, and real-time feedback can be achieved.
Description
Technical Field
The invention relates to a device for detecting the pile forming diameter of a jet grouting pile, which is used for detecting the pile forming diameter and the construction quality of an MJS construction method pile, an RJP construction method pile and a high-pressure jet grouting pile.
Background
In the foundation pit supporting and foundation engineering construction, a conventional high-pressure jet grouting pile is often used, and the process is used for cutting a soil body to form a pile body by jetting a high-pressure jet flow through a nozzle, so that the soil body is reinforced. The RJP method and the MJS method belong to the improvement of the conventional high-pressure jet grouting pile technology. The RJP construction method is named as Rodin Jet Pile (ultrahigh pressure Jet grouting construction method), and the process is characterized in that the Pile diameter of the Jet grouting Pile is enlarged by adopting first cutting and relay cutting. The MJS construction method is called Metro Jet System (all-dimensional high-pressure Jet grouting construction method), and the MJS construction method has the technical characteristics that the forced slurry discharge in the hole can be realized, and the influence on the surrounding environment is reduced.
In general, the major working principle of the MJS-method pile, the RJP-method pile and the conventional high-pressure jet grouting pile is a construction process for cutting a soil body by using a high-pressure jet to form a cement soil pile body.
The existing pile quality detection method mainly comprises the steps of detecting pile quality through dynamic sounding after pile forming or detecting integrity through a core drilling method after 28 days, but specific detection measures are lacked in the construction process.
Disclosure of Invention
The invention aims to provide a device for detecting the pile-forming diameter of a jet grouting pile, which can detect the pile-forming diameter and construction quality of the jet grouting pile in the construction process.
A rotary jet grouting pile forming diameter detection device comprises a hollow pipe, a vibration sensor 5 and a signal processing device 4; the edge position of the preset pile-forming radius is provided with the hollow pipe parallel to the designed pile body, and the inner wall of the hollow pipe is provided with at least two guide rails 6 in the direction parallel to the axial direction; a plurality of vibration sensors 5 are arranged on the guide rail 6 in the hollow pipe at intervals; the vibration sensor 5 is connected with the signal processing device 4, and the signal processing device 4 is connected with the control system; the vibration sensor 5 is used for detecting vibration parameters of the hollow pipe caused by high-pressure fluid ejected by the drill rod at the position of the middle shaft of the spin jet pile.
Preferably, the guide rail 6 protrudes inwards from the inner wall of the hollow pipe, and the outer wall of the vibration sensor 5 is provided with a chute component 7 matched with the guide rail 6; the vibration sensors 5 are connected in series through flexible ropes and are placed in the hollow pipe from the upper end.
Preferably, the chute member 7 protrudes laterally from the body of the vibration sensor 5.
Preferably, the hollow tube is a steel tube.
Further, the chute member 7 has a rectangular groove thereon, and the rectangular groove is in sliding fit with the guide rail 6.
Preferably, the vibration sensors 5 are uniformly arranged along the height range of the hollow pipe.
The detection method of the device for detecting the pile forming diameter of the jet grouting pile comprises the steps of positioning the pile forming radius on a plane, and driving a hollow pipe into the edge of the radius; if the high-pressure fluid jet distance reaches the design radius, the vibration sensor 5 positioned at the edge of the designed pile diameter can detect more obvious vibration, if the high-pressure fluid cannot be jetted in the soil body to reach the design radius, the vibration sensor 5 positioned at the edge of the designed pile diameter cannot detect obvious vibration, and the vibration sensor 5 feeds back the detection parameters to the control system; and the control system detects the pile forming diameter through detecting the vibration.
Preferably, the sensors are distributed in the guide rail, cover the depth range of the whole designed pile body, and detect the top elevation, the bottom elevation, the diameter and the pile forming depth of the pile forming pile body.
Further, the method comprises the following steps: performing plane positioning according to the pile position and the designed pile diameter, and driving a steel pipe 8; aligning the sliding groove 7 with the guide rail 6 and lowering a rope of the series vibration sensor to a designed elevation; the jet grouting drill rod 1 drills into the stratum to start construction, the vibration sensor 5 starts to collect vibration signals and transmits the signals to the signal processing equipment 4; and the signal processing equipment 4 performs summary processing on the vibration frequency and amplitude and feeds back whether the diameter of the construction pile reaches a target position in real time.
The invention has the beneficial effects that:
1) real-time detection is carried out, and whether the pile diameter and the pile length meet the design requirements can be visually judged;
2) the pile-forming quality of the pile body with the corresponding height can be obtained.
2) The operation is simple, and the steel pipe and the sensor can be recycled;
3) the detection is carried out in the construction process, and real-time feedback can be achieved.
Drawings
Fig. 1 is a schematic diagram of a pile-forming diameter detection device of a jet grouting pile.
Fig. 2 is a plan position view of the pile forming diameter detection device of the jet grouting pile of the invention.
Fig. 3 is a top view of the vibration sensor and the chute member thereon.
Figure 4 is a top view of a steel pipe and its internal components.
Fig. 5 is a longitudinal sectional view of the steel pipe.
In the figure, 1, a construction pile body, 2 rotary spraying drill rods, 3 detection rods, 4 signal processing devices, 5 vibration sensors, 6 guide rails, 7 sliding chute components and 8 steel pipes.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1-5, a device for detecting the pile forming diameter of a jet grouting pile comprises a hollow steel pipe 8, a vibration sensor 5, a signal processing device 4, and a detection rod 3 formed by combining a hollow pipe and the vibration sensor; the edge position of the preset pile-forming radius is provided with the hollow pipe parallel to the designed pile body, and the inner wall of the hollow pipe is provided with at least two guide rails 6 in the direction parallel to the axial direction; a plurality of vibration sensors 5 are arranged on the guide rail 6 in the hollow pipe at intervals; the vibration sensor 5 is connected with the signal processing device 4, and the signal processing device 4 is connected with the control system; the vibration sensor 5 is used for detecting vibration parameters of the hollow pipe caused by high-pressure fluid ejected by the drill rod at the position of the middle shaft of the spin jet pile.
Referring to fig. 1, 3 and 4, the guide rail 6 protrudes inwards from the inner wall of the hollow pipe, and the outer wall of the vibration sensor 5 is provided with a chute component 7 matched with the guide rail 6; the vibration sensors 5 are connected in series through flexible ropes and are placed in the hollow pipe from the upper end.
Referring to fig. 3, the chute member 7 protrudes laterally from the body of the vibration sensor 5.
The hollow pipe is a steel pipe 8.
Referring to fig. 1, the chute member 7 has a rectangular groove thereon, which is slidably fitted with the guide rail 6.
In this embodiment, the vibration sensors 5 are uniformly arranged along the height range of the hollow tube.
According to the detection method of the device for detecting the pile forming diameter of the jet grouting pile, the pile forming radius is positioned on the plane, and a hollow pipe is driven into the edge of the radius; because high-pressure fluid is sprayed outwards in the construction process of the MJS construction method pile, the RJP construction method pile and the high-pressure jet grouting pile, if the spraying distance of the high-pressure fluid reaches the design radius, the vibration sensor 5 positioned at the edge of the designed pile diameter can detect obvious vibration, if the high-pressure fluid can not be sprayed in the soil body to reach the design radius, the vibration sensor 5 positioned at the edge of the designed pile diameter can not detect obvious vibration, and the vibration sensor 5 feeds back the detection parameters to the control system; and the control system detects the pile forming diameter through detecting the vibration.
The sensors are distributed in the guide rail, cover the depth range of the whole designed pile body, and detect the top elevation, the bottom elevation, the diameter and the pile forming depth of the pile forming pile body.
During the specific construction, the method comprises the following steps: performing plane positioning according to the pile position and the designed pile diameter, and driving a steel pipe 8; aligning the sliding groove 7 with the guide rail 6 and lowering a rope of the series vibration sensor to a designed elevation; the jet grouting drill rod 1 drills into the stratum to start construction, the vibration sensor 5 starts to collect vibration signals and transmits the signals to the signal processing equipment 4; and the signal processing equipment 4 performs summary processing on the vibration frequency and amplitude and feeds back whether the diameter of the construction pile reaches a target position in real time.
While the preferred embodiments of the present invention have been described, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Claims (9)
1. The utility model provides a spout stake becomes stake diameter detection device soon which characterized in that:
comprises a hollow tube, a vibration sensor (5) and a signal processing device (4);
the edge position of the preset pile-forming radius is provided with the hollow pipe which is parallel to the designed pile body, and the inner wall of the hollow pipe is provided with at least two guide rails (6) in the direction parallel to the axial direction;
a plurality of vibration sensors (5) are installed on the guide rail (6) in the hollow pipe at intervals;
the vibration sensor (5) is connected with a signal processing device (4), and the signal processing device (4) is connected with a control system;
the vibration sensor (5) is used for detecting vibration parameters of the hollow pipe caused by high-pressure fluid ejected by the drill rod at the position of the middle shaft of the spin jet pile.
2. The jet grouting pile forming diameter detection device of claim 1, characterized in that: the guide rail (6) protrudes inwards from the inner wall of the hollow pipe, and a sliding groove component (7) matched with the guide rail (6) is arranged on the outer wall of the vibration sensor (5); the vibration sensors (5) are connected in series through flexible ropes and are placed in the hollow pipe from the upper end.
3. The jet grouting pile forming diameter detection device of claim 1, characterized in that: the sliding groove component (7) protrudes out of the body of the vibration sensor (5) in the lateral direction.
4. The jet grouting pile forming diameter detection device of claim 1, characterized in that: the hollow pipe is a steel pipe.
5. The jet grouting pile forming diameter detection device of claim 2, characterized in that: the sliding groove component (7) is provided with a rectangular groove, and the rectangular groove is in sliding fit with the guide rail (6).
6. The jet grouting pile forming diameter detection device of claim 1, characterized in that: the vibration sensors (5) are uniformly arranged along the height range of the hollow pipe.
7. The detection method of the jet grouting pile forming diameter detection device as claimed in any one of claims 1-6, characterized by comprising the following steps:
the radius of the pile is positioned on the plane, and a hollow pipe is driven into the edge of the radius;
if the high-pressure fluid jet distance reaches the design radius, the vibration sensor (5) positioned at the edge of the designed pile diameter can detect more obvious vibration, if the high-pressure fluid can not be jetted in the soil body to reach the design radius, the vibration sensor (5) positioned at the edge of the designed pile diameter can not detect obvious vibration, and the vibration sensor (5) feeds back the detection parameters to the control system;
and the control system detects the pile forming diameter through detecting the vibration.
8. The detection method of the jet grouting pile forming diameter detection device as claimed in claim 7, wherein: the sensors are distributed in the guide rail, cover the depth range of the whole designed pile body, and detect the top elevation, the bottom elevation, the diameter and the pile forming depth of the pile forming pile body.
9. The detection method of the jet grouting pile forming diameter detection device as claimed in claim 7, characterized by comprising the following steps:
performing plane positioning according to the pile position and the designed pile diameter, and driving a steel pipe (8);
aligning the sliding groove (7) with the guide rail (6) and lowering a rope of the series vibration sensor to a designed elevation;
the rotary jet drilling rod (1) drills into the stratum to start construction, the vibration sensor (5) starts to collect vibration signals and transmits the signals to the signal processing equipment (4);
and the signal processing equipment (4) performs summary processing on the vibration frequency and amplitude and feeds back whether the diameter of the construction pile reaches a target position in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011286822.2A CN112267499A (en) | 2020-11-17 | 2020-11-17 | Rotary jet grouting pile forming diameter detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011286822.2A CN112267499A (en) | 2020-11-17 | 2020-11-17 | Rotary jet grouting pile forming diameter detection device |
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| CN112267499A true CN112267499A (en) | 2021-01-26 |
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| CN202011286822.2A Pending CN112267499A (en) | 2020-11-17 | 2020-11-17 | Rotary jet grouting pile forming diameter detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235582A (en) * | 2021-06-04 | 2021-08-10 | 广东南丰建设工程有限公司 | Safety monitoring device for high-pressure jet grouting pile construction |
| CN115162328A (en) * | 2022-06-13 | 2022-10-11 | 中铁二十局集团第四工程有限公司 | Pile forming method and device for high-pressure jet grouting pile |
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| US20160222619A1 (en) * | 2013-09-03 | 2016-08-04 | Keller Holding Gmbh | Process and assembly for determining the radius of a ground element which can be produced by jet grouting |
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2020
- 2020-11-17 CN CN202011286822.2A patent/CN112267499A/en active Pending
Patent Citations (7)
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| EP2806070A1 (en) * | 2013-05-21 | 2014-11-26 | Bauer Spezialtiefbau GmbH | Device and method for the monitored manufacture of a high pressure injection body |
| US20160222619A1 (en) * | 2013-09-03 | 2016-08-04 | Keller Holding Gmbh | Process and assembly for determining the radius of a ground element which can be produced by jet grouting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235582A (en) * | 2021-06-04 | 2021-08-10 | 广东南丰建设工程有限公司 | Safety monitoring device for high-pressure jet grouting pile construction |
| CN115162328A (en) * | 2022-06-13 | 2022-10-11 | 中铁二十局集团第四工程有限公司 | Pile forming method and device for high-pressure jet grouting pile |
| CN115162328B (en) * | 2022-06-13 | 2024-02-02 | 中铁二十局集团第四工程有限公司 | Pile forming method and pile forming device for high-pressure jet grouting pile |
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