CN209741934U - Pre-buried type pile body foundation detecting system - Google Patents
Pre-buried type pile body foundation detecting system Download PDFInfo
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- CN209741934U CN209741934U CN201920102106.0U CN201920102106U CN209741934U CN 209741934 U CN209741934 U CN 209741934U CN 201920102106 U CN201920102106 U CN 201920102106U CN 209741934 U CN209741934 U CN 209741934U
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Abstract
The utility model relates to a pre-buried pile foundation detection system, which relates to the technical field of concrete structure building quality detection equipment and aims to solve the problem that the existing pre-buried pile foundation detection system can only detect the pouring quality of the pile bottom and can not detect the pouring quality of other height positions of the pile body; the one end of probe rod is equipped with ultrasonic transducer, the other end is equipped with wireless signal transceiver, and wireless signal transceiver connects the treater, and it has the detection mouth to open on the pre-buried stake lateral wall, and the probe rod is kept away from that wireless signal transceiver one end articulates there is the device of buckling, and ultrasonic transducer locates the device of buckling and keeps away from its tip with the probe rod link. The utility model discloses have the beneficial effect that both quality at the bottom of detectable pile also can detect the not co-altitude position quality of pile body.
Description
Technical Field
The utility model belongs to the technical field of concrete structure building quality check out test set technique and specifically relates to a pre-buried type pile shaft ground detecting system is related to.
Background
The cast-in-place concrete pile is a foundation pile body formed by directly punching and pouring concrete on the ground, and because the cast-in-place concrete pile body is formed directly below the ground surface, the quality of the cast-in-place pile and the quality of a bottom foundation at the pile end cannot be observed visually. In order to ensure the construction quality, the quality of the cast-in-place pile generally needs to be detected after concrete pouring, and the detection method comprises a low-strain method, an ultrasonic method and a core drilling method, wherein the core drilling method is used for detecting the properties of the pile body pouring quality, pile bottom sediment, a pile end bearing layer and the like through pile body core drilling. However, such a detection method has problems: the core drilling along the whole pile leads to complex detection construction, longer detection time and low construction efficiency, and the core drilling machine damages the whole structure of the cast-in-place pile and reduces the structural strength of the cast-in-place pile.
In order to solve the above problems, the chinese invention with the publication number CN106223375B discloses an embedded pile end foundation detection system, which comprises a embedded pile, wherein the embedded pile is a tapered tubular structure, the outer wall of the embedded pile is provided with a reinforcing synapse, and the small end of the embedded pile is formed by an arc-shaped plate; the first plugging rod is in threaded connection with the embedded pile and is provided with a disassembling head and an expansion head, and the expansion head is provided with a shifting plate; the second plugging rod comprises an outer rod and a piston rod, the outer rod is provided with a discharge hole and a loading cavity, and the piston rod is inserted into the loading cavity from the other end of the outer rod; the ultrasonic probe is arranged at one end of the detection rod, and the wireless signal receiving and transmitting device is arranged at one end of the detection rod.
According to the invention, after the cast-in-place pile is poured, the first plugging rod is pulled out to form a through channel. Need not to bore the core operation and just can detect, easy operation, detect the back that finishes and insert this through passage of shutoff in the bored concrete pile with second shutoff pole, can improve whole bored concrete pile's structural strength.
However, in the invention, only the arc-shaped plate at the bottom of the embedded pile can be opened, so that the pouring quality of the pile bottom can be detected only, and the pouring quality of other height positions of the pile body cannot be detected, so that the limitation is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pre-buried type pile shaft ground detecting system, it has the beneficial effect that both quality at the bottom of detectable pile can also detect the not co-altitude position quality of pile shaft.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
A pre-buried pile body foundation detection system comprises a pre-buried pile, a plugging rod and a detection rod, wherein the pre-buried pile is integrally cylindrical, one end of the pre-buried pile is inserted into a cast-in-place pile, the other end of the pre-buried pile is exposed out of the top of the cast-in-place pile, a through hole is axially arranged in the pre-buried pile in a penetrating mode, a thread is arranged in the through hole, and the periphery of the plugging rod is in threaded fit with the through hole of the pre-buried pile; the diameter of probe rod is less than the internal diameter of pre-buried pile, the one end of probe rod is provided with ultrasonic transducer, the other end of probe rod is provided with radio signal transceiver, ultrasonic transducer with the radio signal transceiver electricity links, radio signal transceiver connects the treater, pre-buried pile bottom is equipped with the round flap, the flap rotate connect in the bottom of pre-buried pile, just the flap is conical under the folded state, it has the detection mouth of intercommunication pre-buried pile inside and outside wall to open on the pre-buried pile lateral wall, the probe rod is kept away from radio signal transceiver one end articulates there is the device of buckling, ultrasonic transducer locates buckle the device and keep away from its tip with the probe rod link.
By adopting the technical scheme, the plugging rod is screwed in the embedded pile through threads, the embedded pile is embedded in the middle position of the cast-in-place pile before the cast-in-place pile is solidified, after the embedded pile is initially solidified, the plugging rod is continuously screwed in towards the pile bottom, so that the plugging rod pushes open the valve gathered at the bottom of the embedded pile, the concrete at the bottom of the embedded pile is exposed, then the plugging rod is gradually screwed out, at the moment, not only the exposed concrete is arranged at the bottom of the embedded pile, but also the concrete is exposed at the detection port on the side wall of the embedded pile, when the pouring quality of the cast-in-place pile is detected, the detection rod is a straight rod, and the end of the detection rod provided with the ultrasonic probe gradually extends into the bottom of the embedded pile, so that the concrete at the bottom of the cast-in-place pile can be detected; in addition, the detection rod can be extended to the corresponding position of the detection port and the bending device is started, so that the ultrasonic probe is aligned to the detection port, and the concrete on the height of the detection port is detected, thereby ensuring the pouring quality of the whole pile body on different heights.
The utility model discloses further set up to: an isolation membrane is clamped between the embedded pile and the plugging rod and is arranged at the position of the detection port, and the area of the isolation membrane is larger than that of the detection port.
Through adopting above-mentioned technical scheme, before screwing in the pre-buried stake with the shutoff pole through the screw thread, can be fixed in the detection mouth department of pre-buried stake in advance with the barrier film, then twist the shutoff pole into, when the pre-buried stake is buried underground in the concrete pile body, because the isolation of barrier film, the concrete that detects the mouth outside can not directly contact with the shutoff pole to can not be on the shutoff pole after solidifying the adhesion, consequently the shutoff pole can be convenient twist out from the shutoff pole and can not additionally receive the resistance of the concrete of detection mouth department. After the plugging rod is screwed out, the isolating membrane can be poked by any rod with a sharp thorn, and the concrete at the detection port is exposed for convenient detection.
The utility model discloses further set up to: the screw thread interval in the embedded pile sets up, the part that the shutoff pole stretches into in the embedded pile all is equipped with the screw thread, detect the mouth and correspond the screw thread interval setting in the embedded pile.
Through adopting above-mentioned technical scheme, the screw thread section is spaced connects the shutoff pole in the pre-buried pile, not only can fix the shutoff pole, compares with the whole terminal threaded mode of all establishing in pre-buried pile hole moreover, and the interval sets up the screw thread mode and more is favorable to the back-off of shutoff pole, makes the moment of torsion that the shutoff pole back-off in-process bore littleer.
The utility model discloses further set up to: the valve is connected with the bottom end of the embedded pile through a torsion spring, and the valve is gathered together under the natural state of the torsion spring.
Through adopting above-mentioned technical scheme, the torsional spring makes gathering together between the valve each other to avoid at the in-process of concreting pile, during the concrete flowed into the embedded pile between the valve, influence the measurement degree of depth of pile body bottom, thereby lead to measuring the position inaccurate.
The utility model discloses further set up to: the bending device comprises an end rod, the end rod is hinged to the end portion of the detection rod, the ultrasonic probe is arranged at the end portion, far away from the end portion, connected with the detection rod, of the end rod, the detection rod is far away from the end portion, one end of the end rod is hinged to a traction rod, the end rod is consistent with the hinged rotating direction of the traction rod, and the traction rod is parallel to the end rod and is provided with a traction wire.
by adopting the technical scheme, when the concrete at the bottom of the embedded pile is detected, one end of the detection rod, which is connected with the end rod and the ultrasonic probe, vertically extends into the embedded pile without touching the traction rod, and at the moment, the end rod naturally droops under the action of gravity, so that the end rod and the detection rod extend into the bottom of the embedded pile together to measure the concrete at the bottom; when detecting the concrete on each height of pile body, the one end that is connected with probe rod and ultrasonic transducer is vertical to stretch into the detection mouth position on the corresponding height in the pre-buried stake, then the pulling traction lever, make the traction lever rotate to keeping away from end rod one end around the pin joint, thereby it is rotatory around its articulated position to drive traction wire pulling end rod, on the end rod fixed connection ultrasonic transducer's one end is just to detecting the mouth position after rotatory, thereby can detect the quality of pouring that detects the concrete pile that the mouth corresponds highly, this bending apparatus simple structure, high durability and convenient use, can easily reach the effect that the pile bolck one end control probe rod from probe rod stretches into the bending of pre-buried stake one end.
The utility model discloses further set up to: the end part of the detection rod connected with the end rod is provided with a baffle plate, the baffle plate is parallel to the detection rod and clings to one side of the end rod, which is not connected with the traction wire, and an elastic part is arranged between the end rod and the detection rod and penetrates through the baffle plate.
Through adopting above-mentioned technical scheme, the end rod hugs closely on the baffle under the traction of elastic component to guaranteed that the end rod is located the extending direction of probe rod and can not swing at will when not being drawn by the traction wire, the influence is to the detection effect of pile bottom quality.
the utility model discloses further set up to: the detection rod is provided with scales along the length direction of the detection rod.
Through adopting above-mentioned technical scheme, the scale on the gauge rod is used for showing the degree of depth that ultrasonic probe stretched into in the pre-buried stake to make things convenient for the staff of testing to control the probe rod stretch into speed and stop position, guarantee measuring accuracy.
The utility model discloses further set up to: the upper end of the plugging rod is provided with a hexagonal boss.
Through adopting above-mentioned technical scheme, the hexagonal boss makes things convenient for personnel to twist out it in the mode of overlapping the spanner on the hexagonal boss from shutoff pole upper end after the concrete has solidified to make the screw-out of shutoff pole more convenient and laborsaving.
To sum up, the utility model discloses a beneficial technological effect does:
Through set up the inspection hole on the pre-buried stake lateral wall to set up the device of buckling at the tip of gauge rod, make this device not only can be used for detecting the concrete pile bottom pour the quality, can be used for detecting the concrete placement quality on the different degree of depth of concrete pile body in addition, detection range is wider, and the suitability is stronger.
Drawings
Fig. 1 is a cross-sectional view of a pre-buried pile in the pre-buried pile foundation detection system disclosed by the utility model.
Fig. 2 is a schematic view of the construction of the plugging rod.
Fig. 3 is a schematic view of the probe rod structure.
In the figure, 1, pre-burying piles; 11. a valve; 12. a detection port; 13. a torsion spring; 2. a plugging rod; 21. a hexagonal boss; 3. a probe rod; 30. a bending device; 31. an end bar; 32. an ultrasonic probe; 33. drawing wires; 34. a draw bar; 35. a baffle plate; 36. an elastic member; 37. a handle; 38. a wireless signal transceiver; 39. and (4) calibration.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, the pre-buried pile foundation detection system disclosed by the present invention comprises a pre-buried pile 1 (refer to fig. 1), a plugging rod 2 (refer to fig. 2) and a detection rod 3 (refer to fig. 3), wherein the pre-buried pile 1 is overall cylindrical, one end of the pre-buried pile is inserted into the cast-in-place pile, and the other end is exposed out of the top of the cast-in-place pile, in this embodiment of the present invention, after the pre-buried pile 1 is inserted into the cast-in-place pile, the top end of the pre-buried pile is flush with the top end of the cast-in-place pile, the pre-buried pile 1 is provided with a through hole along the length direction, a thread is arranged in the through hole, the bottom of the pre-buried pile 1 is also provided with a circle of valves 11, the number of the valves 11 in the utility model is four, the valves 11 are connected with the bottom end of the pre-buried pile 1 by adopting a torsional spring 13, the valves 11 are mutually gathered to form a closed cone under the natural state of the torsional spring 13, and the side wall of the pre-buried pile 1 is provided with a detection port 12 which is communicated; the outer diameter of the plugging rod 2 is matched with the threads in the through hole of the embedded pile 1, the length of the plugging rod 2 is larger than that of the embedded pile 1, and a hexagonal boss 21 for clamping a wrench is arranged at the part, exposed out of the top end of the embedded pile 1, of the plugging rod 2; the detection rod 3 is a rod with the diameter smaller than the inner diameter of the embedded pile 1, one end of the detection rod is provided with an ultrasonic probe 32, the other end of the detection rod is provided with a wireless signal transceiver 38, the ultrasonic probe 32 is connected with the wireless signal transceiver 38, the wireless signal transceiver 38 is connected with a processor, and one end of the detection rod 3, which is close to the ultrasonic probe 32, is provided with a bending device 30.
Before the device is used, a plugging rod 2 is screwed in a pre-buried pile 1 in advance through threads, the pre-buried pile 1 is vertically buried in the center of the pre-buried pile 1 before the pre-buried pile is initially set, when the setting degree of the pre-buried pile 1 is more than eighty percent, concrete is basically set but still has certain fluidity, at the moment, the plugging rod 2 is continuously screwed in towards the bottom of the pre-buried pile 1, so that the plugging rod 2 pushes a flap 11 gathered at the bottom of the pre-buried pile 1, the flap 11 extrudes the concrete at the bottom of the pre-buried pile 1 to be gradually opened, thereby exposing the concrete at the bottom of the pre-buried pile 1, after a little moment, the flap 11 is fixed in an opening state by the concrete, then the plugging rod 2 is gradually screwed out, at the moment, not only is the exposed concrete at the bottom of the pre-buried pile 1, but also the concrete is exposed at a detection port 12 on the side wall of the pre-buried pile 1, when the pouring quality of the pouring pile is detected, when the device 30, the detection rod 3 is a straight rod, and one end of the detection rod 3, which is provided with the ultrasonic probe 32, gradually extends into the bottom of the embedded pile 1, so that the concrete at the bottom of the cast-in-place pile can be detected.
When the pouring quality of the pile body at different heights needs to be detected, the detecting rod 3 can be extended to the corresponding position of the detecting port 12 and the bending device 30 is started, so that the ultrasonic probe 32 is aligned to the detecting port 12 to detect the concrete at the height of the detecting port 12, the ultrasonic probe 32 transmits the detected signal to the wireless signal transceiver 38, the wireless signal transceiver 38 feeds the signal back to the processor for analysis and processing, and finally, the personnel can know the integral quality condition of the poured pile. The arrangement of the hexagonal boss 21 on the plugging rod 2 is convenient for personnel to rotate the plugging rod 2 by using a hexagonal wrench, so that the use is convenient and labor-saving.
After the detection is finished, in order to ensure the structural stability of the cast-in-place pile, the cast-in-place pile is filled with concrete manually into the inner hole of the embedded pile 1. The pouring quality of the filling pile at each height can be detected on the premise that only one pre-buried pile 1 is embedded on the filling pile, construction is more convenient, applicability is stronger, and structural damage to the filling pile is smaller.
Referring to fig. 3, the bending device 30 on the detecting rod 3 includes an end rod 31, the end rod 31 is connected between the detecting rod 3 and the ultrasonic probe 32, the end rod 31 is hinged to the end of the detecting rod 3, the end of the detecting rod 3 near the wireless signal transceiver 38 is hinged to a drawbar 34, the direction of the end rod 31 is consistent with the direction of the drawbar 34, a handle 37 is fixedly connected between the drawbar 34 and the end of the detecting rod 3 far from the end rod 31, the handle 37 is perpendicular to the detecting rod 3, the handle 37 is convenient for a person to hold the detecting rod 3 during the process of putting in the detecting rod 3, and can assist in applying force when the person rotates the drawbar 34, a pull wire 33 is arranged between the drawbar 34 and the end rod 31 in parallel to the detecting rod 3, the pull wire 33 can be a steel wire, an iron wire or the like, a baffle 35 is arranged at the end of the detecting rod 3 connected to the end rod 31, the baffle 35 extends along the length direction of the detecting rod, an elastic part 36 penetrates through the baffle 35 between the end rod 31 and the detection rod 3, and the elastic part 36 in the embodiment is a spring; meanwhile, in order to facilitate the personnel to know the penetration depth of the detection rod 3 from the upper part of the cast-in-place pile, the detection rod 3 is also provided with scales 39 along the length direction of the detection rod 3.
When the person does not apply force to the traction rod 34, the end rod 31 is tightly attached to the baffle 35 under the traction of the elastic piece 36, so that the end rod is kept in the forward extending direction of the detection rod 3 to detect the concrete at the bottom of the embedded pile 1; when concrete on each height of the pile body is detected, one end of the detection rod 3, which is connected with the end rod 31 and the ultrasonic probe 32, vertically extends into the position of the detection port 12 on the corresponding height in the embedded pile 1, the position can be judged according to scales 39 on the detection rod 3, then the handle 37 is held by hand, the traction rod 34 is pulled, the free end of the traction rod 34 rotates towards one end far away from the end rod 31 around a hinge point, the traction rod 34 rotates to drive the traction wire 33 to pull the end rod 31 to rotate around the hinge point, one end of the end rod 31, which is fixedly connected with the ultrasonic probe 32, is rotated and then faces the position of the detection port 12, so that the pouring quality of the concrete pile on the corresponding height of the detection port 12 can be detected, the bending device 30 is simple in structure and convenient to use, and the effect of controlling the detection rod 3 to extend into the embedded pile 1 from one end of the pile top.
Referring to fig. 1, in order to avoid that the blocking rod 2 is difficult to rotate and extend into or withdraw from the pre-buried pile 1 due to the bonding of the concrete at the detection port 12, an isolation film (not shown in the figure) is clamped between the pre-buried pile 1 and the blocking rod 2, the isolation film may be made of tinfoil or a plastic film, and the isolation film is disposed at the position of the detection port 12 and has an area larger than that of the detection port 12. Meanwhile, in order to save labor in the process of screwing the plugging rod 2, the threads in the embedded pile 1 are arranged at intervals, the part of the plugging rod 2 extending into the embedded pile 1 is provided with threads, and the detection port 12 is arranged on the side wall of the embedded pile 1 provided with the threads.
Before screwing the plugging rod 2 into the pre-buried pile 1 through the threads, the isolating membrane can be fixed at the detection port 12 of the pre-buried pile 1 in advance by using methods such as adhesion and the like, then the plugging rod 2 is screwed in, and in the process of putting the pre-buried pile 1 into a cast-in-place pile, concrete outside the detection port 12 cannot be directly contacted with the plugging rod 2, so that the concrete cannot be adhered to the plugging rod 2 after solidification, and therefore the plugging rod 2 can be conveniently screwed out of the plugging rod 2 without additionally receiving the resistance of the concrete at the detection port 12. After the plugging rod 2 is screwed out, the isolating membrane can be poked by any rod piece with a sharp thorn, and the concrete at the detection port 12 is exposed for convenient detection; simultaneously, the screw thread interval in the embedded pile 1 sets up in the above-mentioned setting, therefore the axial force that shutoff pole 2 received is littleer, screws out more conveniently.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. A pre-buried pile foundation detection system comprises a pre-buried pile (1), a plugging rod (2) and a detection rod (3), wherein the whole pre-buried pile (1) is cylindrical, one end of the pre-buried pile is inserted into a cast-in-place pile, the other end of the pre-buried pile is exposed out of the top of the cast-in-place pile, a through hole is axially arranged in the pre-buried pile (1) in a penetrating mode, threads are arranged in the through hole, and the periphery of the plugging rod (2) is in threaded fit with the through hole of the pre-buried pile (1); the diameter of gauge stick (3) is less than the internal diameter of pre-buried stake (1), the one end of gauge stick (3) is provided with ultrasonic probe (32), the other end of gauge stick (3) is provided with wireless signal transceiver (38), ultrasonic probe (32) with wireless signal transceiver (38) electricity is even, wireless signal transceiver (38) connect the treater, its characterized in that: the embedded pile is characterized in that a circle of valve (11) is arranged at the bottom of the embedded pile (1), the valve (11) is rotatably connected to the bottom end of the embedded pile (1), the valve (11) is tapered in a furled state, a detection port (12) communicated with the inner wall and the outer wall of the embedded pile (1) is formed in the side wall of the embedded pile (1), a bending device (30) is hinged to one end, far away from the wireless signal transceiver (38), of the detection rod (3), and the ultrasonic probe (32) is arranged at the end, far away from the connecting end between the bending device (30) and the detection rod (3).
2. The embedded pile foundation detection system of claim 1, wherein: an isolation membrane is clamped between the embedded pile (1) and the plugging rod (2), and is arranged at the position of the detection port (12), and the area of the isolation membrane is larger than that of the detection port (12).
3. The embedded pile foundation detection system of claim 2, wherein: the screw thread interval in the embedded pile (1) sets up, the part that shutoff pole (2) stretched into in the embedded pile (1) all is equipped with the screw thread, detect mouthful (12) and correspond the screw thread interval setting in the embedded pile (1).
4. The embedded pile foundation detection system of claim 1, wherein: the valve (11) is connected with the bottom end of the embedded pile (1) through a torsion spring (13), and the valves (11) are gathered together under the natural state of the torsion spring (13).
5. The embedded pile foundation detection system of claim 1, wherein: bending device (30) include end lever (31), end lever (31) with the articulated setting of tip of probe rod (3), ultrasonic probe (32) are located end lever (31) are kept away from the tip of its and probe rod (3) link, probe rod (3) are kept away from end lever (31) one end articulates there is traction lever (34), end lever (31) with the articulated rotation direction of traction lever (34) is unanimous, traction lever (34) with be on a parallel with between end lever (31) probe rod (3) is equipped with haulage wire (33).
6. The embedded pile foundation detection system of claim 5, wherein: the detection rod (3) with the tip that end rod (31) are connected is equipped with baffle (35), baffle (35) are on a parallel with detection rod (3) and hug closely end rod (31) do not connect pull wire (33) one side and set up, end rod (31) with run through between detection rod (3) baffle (35) are equipped with elastic component (36).
7. The embedded pile foundation detection system of claim 5, wherein: the detection rod (3) is provided with scales (39) along the length direction of the detection rod (3).
8. The embedded pile foundation detection system of claim 1, wherein: the upper end of the plugging rod (2) is provided with a hexagonal boss (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920102106.0U CN209741934U (en) | 2019-01-21 | 2019-01-21 | Pre-buried type pile body foundation detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920102106.0U CN209741934U (en) | 2019-01-21 | 2019-01-21 | Pre-buried type pile body foundation detecting system |
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| CN209741934U true CN209741934U (en) | 2019-12-06 |
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| CN201920102106.0U Active CN209741934U (en) | 2019-01-21 | 2019-01-21 | Pre-buried type pile body foundation detecting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362735A (en) * | 2020-11-19 | 2021-02-12 | 西安镇青建筑工程有限公司 | Pile bottom geological defect detection equipment and detection process thereof |
| CN112832302A (en) * | 2020-12-31 | 2021-05-25 | 常州市恒正交通工程试验检测中心有限公司 | Concrete composite foundation pile body strength detection system |
-
2019
- 2019-01-21 CN CN201920102106.0U patent/CN209741934U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362735A (en) * | 2020-11-19 | 2021-02-12 | 西安镇青建筑工程有限公司 | Pile bottom geological defect detection equipment and detection process thereof |
| CN112362735B (en) * | 2020-11-19 | 2023-12-26 | 西安镇青建筑工程有限公司 | Pile bottom geological defect detection equipment and pile bottom geological defect detection process |
| CN112832302A (en) * | 2020-12-31 | 2021-05-25 | 常州市恒正交通工程试验检测中心有限公司 | Concrete composite foundation pile body strength detection system |
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