CN213926400U - Rotary jet grouting pile forming diameter detection device - Google Patents
Rotary jet grouting pile forming diameter detection device Download PDFInfo
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- CN213926400U CN213926400U CN202022655950.1U CN202022655950U CN213926400U CN 213926400 U CN213926400 U CN 213926400U CN 202022655950 U CN202022655950 U CN 202022655950U CN 213926400 U CN213926400 U CN 213926400U
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Abstract
The utility model relates to a pile-forming diameter detection device of a jet grouting pile, which comprises a hollow pipe, a vibration sensor and a signal processing device; 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 utility model can monitor in real time and 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 utility model relates to a spout stake pile diameter detection device soon for detect MJS worker method stake, RJP worker method stake, high pressure spout stake pile diameter and construction quality soon.
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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a spout stake pile-forming diameter detection device soon can detect the stake diameter and the construction quality of spouting the stake soon in the work progress.
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 beneficial effects of the utility model reside in 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 view of the pile-forming diameter detecting device of the jet grouting pile of the present invention.
Fig. 2 is a plan view of the pile diameter detecting device of the jet grouting pile of the present 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 present invention will be further described with reference to the accompanying drawings and specific embodiments.
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.
The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements on the basis of the above embodiments, which should fall within the scope of the present invention as claimed.
Claims (6)
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 2, 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022655950.1U CN213926400U (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 |
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| CN202022655950.1U CN213926400U (en) | 2020-11-17 | 2020-11-17 | Rotary jet grouting pile forming diameter detection device |
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| CN213926400U true CN213926400U (en) | 2021-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267499A (en) * | 2020-11-17 | 2021-01-26 | 上海长凯岩土工程有限公司 | Rotary jet grouting pile forming diameter detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267499A (en) * | 2020-11-17 | 2021-01-26 | 上海长凯岩土工程有限公司 | Rotary jet grouting pile forming diameter detection device |
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