CN112095683A - Testing device and testing method for high strain method detection of foundation pile - Google Patents
Testing device and testing method for high strain method detection of foundation pile Download PDFInfo
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- CN112095683A CN112095683A CN202010987492.3A CN202010987492A CN112095683A CN 112095683 A CN112095683 A CN 112095683A CN 202010987492 A CN202010987492 A CN 202010987492A CN 112095683 A CN112095683 A CN 112095683A
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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Abstract
The invention discloses a testing device and a testing method for high strain method detection of a foundation pile, wherein the testing device comprises: the testing heavy hammer is used for impacting the pile foundation to be tested; the frame body is used for placing a test heavy hammer; the lifting mechanism is arranged on the frame body, connected with the test heavy hammer and used for lifting the test heavy hammer to a test height; the detection assembly is arranged on the frame body and used for detecting the alignment degree and distance between the test heavy hammer and the foundation pile to be detected; the auxiliary supporting component is connected with the frame body and is used for adjusting the verticality of the frame body and the ground; and the sensor component is arranged on the foundation pile to be tested, and is used for acquiring a stress signal and a speed signal of the pile foundation to be tested when the foundation pile to be tested is impacted by the test heavy hammer. According to the invention, the auxiliary supporting component is arranged to adjust the verticality between the frame body and the ground, so that the test heavy hammer can be collided with the pile foundation to be tested in a free-fall manner, and the detection precision is greatly improved.
Description
Technical Field
The invention belongs to the technical field of pile foundation detection, and particularly relates to a testing device and a testing method for high-strain-method detection of a foundation pile.
Background
In order to judge the construction quality and the bearing performance of the foundation pile and ensure the safety of the superstructure, the pile foundation needs to be subjected to corresponding pile foundation quality detection and bearing capacity test before the superstructure is built. Conventional pile foundation detection methods include low strain methods, acoustic transmission methods, core drilling methods, high strain methods, static load methods, and the like. At present, the bearing capacity of the pile foundation is generally detected by a static load method or a high strain method, wherein the high strain method has the advantages of low cost, high efficiency, capability of detecting the integrity of the pile body and the like.
In the prior art, the traditional high-strain testing device has the defects of large tonnage and size, and inflexible detection operation, and in addition, the poor stability of the high-strain crane, the angle of the hammer frame and the horizontal ground, and the eccentric falling of the hammer are difficult points of a high-strain testing method and influence on the testing precision of the high-strain testing method.
Disclosure of Invention
In order to overcome the technical defects, the invention provides a testing device for high-strain-method detection of a foundation pile, which can improve the testing precision.
In order to solve the problems, the invention is realized according to the following technical scheme:
a testing device for foundation pile high strain method detection comprises the following components:
the testing heavy hammer is used for impacting the pile foundation to be tested;
the frame body is used for placing the test heavy hammer;
the lifting mechanism is arranged on the frame body, connected with the test heavy hammer and used for lifting the test heavy hammer to a test height;
the detection assembly is arranged on the frame body and used for detecting the alignment degree and distance between the test heavy hammer and the foundation pile to be detected;
the auxiliary supporting component is connected with the frame body and is used for adjusting the verticality of the frame body and the ground;
and the sensor component is arranged on the foundation pile to be tested and used for acquiring a stress signal and a speed signal of the pile foundation to be tested when the foundation pile to be tested is impacted by the test heavy hammer.
Compared with the prior art, the invention has the beneficial effects that: the support body with the small volume is adopted, the flexibility of the testing device is enhanced, the support body is kept stable and kept in a vertical state through the auxiliary supporting part, the testing heavy hammer can be ensured to impact with a pile foundation to be tested in a free falling mode, and the detection precision is greatly improved.
As a further improvement of the invention, a guide rail is arranged in the frame body along the vertical direction, and the test heavy hammer is arranged in the guide rail and moves up and down in the guide rail.
As a further improvement of the invention, a guide rail cross brace is arranged in the guide rail along the horizontal direction.
As a further improvement of the invention, the invention also comprises: one end of the auxiliary supporting component is arranged on the position adjusting component, and the other end of the auxiliary supporting component is connected with the frame body; the position adjustment part includes: the electronic universal wheel, electronic universal wheel is provided with the service brake.
As a further improvement of the present invention, the auxiliary support member includes: the screw lifting mechanism is arranged on the electric universal wheel;
one end of the outer side inclined stay bar is arranged on the screw lifting mechanism, and the other end of the outer side inclined stay bar is connected with the middle part of the frame body;
one end of the middle inclined stay bar is arranged on the screw lifting mechanism, and the other end of the middle inclined stay bar is connected with the bottom of the frame body;
one end of the bottom inclined support rod is arranged on the screw lifting mechanism, and the other end of the bottom inclined support rod is connected with the guide rail.
As a further improvement of the present invention, the detection assembly includes a plurality of laser centering apparatuses, which are disposed on the guide rail and are used for detecting the alignment degree of the test weight and the foundation pile to be tested.
As a further improvement of the present invention, the detection assembly further includes a laser distance meter for obtaining a distance between the foundation pile to be tested and the test weight.
As a further improvement of the invention, the invention also comprises: and the wireless terminal controller is connected with the position adjusting component through a wireless network and is used for controlling the movement of the position adjusting component.
As a further improvement of the present invention, the lifting mechanism includes: the electric hoist, the side pulley, the centering pulley and the lifting hook;
the electric hoist, the measuring pulley and the centering pulley are all arranged on the frame body, and a steel strand of the electric hoist is wound outside the measuring pulley and the centering pulley and extends into the guide rail; the lifting hook is fixed at the tail end of the steel strand.
In addition, the invention also provides a testing method for detecting the high strain of the foundation pile by adopting the testing device, and the testing method comprises the following steps:
moving the frame body until the testing heavy hammer is positioned above the pile foundation to be tested;
detecting the alignment degree and distance between the test heavy hammer and the foundation pile to be tested through the detection assembly;
adjusting the position of the test heavy hammer to align the test heavy hammer with the foundation pile to be tested, wherein the distance between the heavy hammer and the foundation pile to be tested reaches the test height;
adjusting the auxiliary supporting component to enable the shelf body to be horizontal and vertical to the ground;
installing the sensor assembly on the foundation pile to be detected;
releasing the test heavy hammer to impact the foundation pile to be tested in a free-falling mode;
force and velocity signals are acquired from the sensor assembly.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic structural diagram of a testing apparatus according to an embodiment;
FIG. 2 is a flowchart of the testing method according to the second embodiment.
Description of the labeling:
1. testing a heavy hammer; 2. a frame body; 21. a guide rail; 22. a guide rail cross brace; 3. a lifting mechanism; 31. an electric hoist; 32. a side pulley; 33. a centering pulley; 34. a hook; 35. steel strand wires; 4. a detection component; 41. a laser centering instrument; 42. a laser range finder; 5. an auxiliary support member; 51. a jack; 52. an outboard diagonal brace; 53. a middle diagonal brace; 54. a bottom diagonal brace; 6. a sensor assembly; 7. a position adjusting member; 71. an electric universal wheel; 72. a foot brake; 8. a wireless terminal controller; 100. And (5) the foundation pile to be tested.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example one
The embodiment discloses a testing arrangement for high strain method detection of foundation pile, package as shown in fig. 1 includes: the device comprises a test heavy hammer 1, a frame body 2, a lifting mechanism 3, a detection assembly 4, an auxiliary support component 5 and a sensor assembly 6, wherein the test heavy hammer 1 is used for impacting a pile foundation to be tested; the frame body 2 is used for placing the test heavy hammer 1; the lifting mechanism 3 is arranged on the frame body 2, connected with the test heavy hammer 1 and used for lifting the test heavy hammer 1 to a test height; the detection assembly 4 is arranged on the frame body 2 and used for detecting the alignment degree and distance between the test heavy hammer 1 and the foundation pile 100 to be detected; the auxiliary supporting component 5 is connected with the frame body 2 and is used for adjusting the verticality of the frame body 2 and the ground; the sensor assembly 6 is arranged on the foundation pile 100 to be tested, and collects a stress signal and a speed signal of the pile foundation to be tested when the foundation pile 100 to be tested is impacted by the test heavy hammer 1.
According to the technical Specification for detecting construction foundation piles JGJ 106-: when the bearing capacity is detected by adopting a high strain method, the ratio of the weight of the test heavy hammer to the characteristic value of the vertical compression-resistant bearing capacity of the single pile is not less than 0.02. In the embodiment, the test heavy hammer 1 with a small size can be adopted, the weight can be less than 1.0t, and the method is suitable for detecting the high strain of the foundation pile with the bearing capacity characteristic not more than 500 kN; and can dispose the test weight accessory synchronously, the increment does not exceed 0.5t, anchor and connect with test weight 1; the combined hammer can be used for high strain detection of foundation piles with bearing capacity characteristics not exceeding 750kN, the detection conditions of most low-bearing-capacity piles in the current market such as miniature steel pipe piles are met, and the detection service range is expanded.
Further, support body 2 comprises a plurality of vertical supports and a plurality of horizontal support for support body 2 forms a small-size support body 2 of frame type, is provided with guide rail 21 along vertical direction in the support body 2, and guide rail 21 is parallel with vertical support promptly, and test weight 1 sets up in guide rail 21, and up-and-down motion in guide rail 21, guide rail 21 mainly plays following effect: providing a fixed motion track for the movement of the heavy hammer, and limiting the test heavy hammer 1 so as to prevent the test heavy hammer 1 from deviating from a preset track in the process of falling; that is to say, when support body 2 placed the balance, the straightness that hangs down when guaranteeing the striking can be fallen perpendicularly in guide rail 21 to test weight 1, and when support body 2 placed certain angle, test weight 1 also can strike the pile foundation that awaits measuring under guide rail 21's restraint.
In the above embodiment, the rail cross brace 22 is horizontally disposed in the rail 21, and the rail cross brace 22 can reinforce the rail 21, so as to prevent the test weight 1 from colliding with the rail 21 in the free-fall process, and thus the rail 21 is prevented from being damaged and deformed.
In addition, in order to adjust the position of the test weight 1, the present embodiment further includes: one end of the auxiliary supporting component 5 is arranged on the position adjusting component 7, and the other end of the auxiliary supporting component is connected with the frame body 2; the position adjusting member 7 includes: the electric universal wheel 71, the electric universal wheel 71 is provided with a foot brake 72, and when the test weight 1 reaches a required position, the foot brake 72 is put down to maintain the stability of the frame body 2.
Specifically, the auxiliary support member 5 includes: the lifting jack 51 is arranged on the electric universal wheel 71; one end of the outer inclined stay bar 52 is arranged on the screw lifting mechanism 51, and the other end is connected with the middle part of the frame body 2; one end of the middle diagonal brace 53 is arranged on the jack 51, and the other end is connected with the bottom of the frame body 2; bottom diagonal brace 54's one end sets up on jack 51, and the other end is connected with guide rail 21, during the use, adjusts the support body through jack 51 for support body 2 can be subaerial remain stable, avoids leading to support body 2 to empty because the ground unevenness, and in addition, through jack 51, can also adjust guide rail 21's vertical degree.
In the above embodiment, the detecting assembly 4 includes two laser centering devices 41 respectively disposed at the bottoms of the two sides of the guide rail 21, and is used for detecting the alignment degree between the testing weight 1 and the foundation pile, and the detecting personnel can finely adjust the position of the testing weight 1 according to the data measured by the laser centering devices 41, so as to ensure the alignment between the testing weight 1 and the foundation pile 100 to be tested.
Furthermore, the detecting component 4 further includes a laser range finder 42 for obtaining the distance between the foundation pile 100 to be detected and the testing weight 1, and the testing device lifts the testing weight 1 to the required height through the lifting mechanism 3 before use, at this time, the laser range finder 42 can detect whether the distance between the foundation pile 100 to be detected and the testing weight 1 meets the height requirement.
In order to conveniently move the frame body 2, the embodiment further comprises a wireless terminal controller 8 which is connected with the position adjusting part 7 through a wireless network and used for controlling the movement of the position adjusting part 7, wherein the wireless terminal controller 8 controls the electric universal wheels 71 to rotate, so that the frame body 2 is moved, and on the basis, the frame body 2 can be moved quickly, and manpower is saved.
In the above embodiment, the lifting mechanism 3 includes: an electric hoist 31, a side pulley 32, a centering pulley 33 and a hook 34; the electric hoist 31, the measuring pulley and the centering pulley 33 are all arranged on the frame body 2, and a steel strand 35 of the electric hoist 31 is wound outside the measuring pulley and the centering pulley 33 and extends into the guide rail 21; the lifting hook 34 is fixed at the tail end of the steel strand 35, the test heavy hammer 1 is hung at the tail end of the steel strand 35, the electric hoist 31 is adopted to replace large-scale crane equipment, and test cost is saved.
Based on the arrangement of the structure, the present embodiment can achieve the following effects:
1. the length, the width and the height of the frame body 2 are small, so that the size of the whole testing device is reduced, and the operation is flexible;
2. the electric hoist 31 is adopted to replace large crane equipment, so that the test cost can be saved, and the operation risk can be reduced;
3. the wireless terminal controller 8 is adopted to control the movement of the frame body 2, so that the automation of the test is realized, the labor is saved and the detection efficiency is improved;
4. by arranging the laser centering instrument 41 and the laser range finder 42, the test can be performed in a more accurate environment, and the accuracy of the test is improved.
Example two
The embodiment discloses a testing method for high-strain-method detection of a foundation pile, which adopts the testing device of the first embodiment, and as shown in fig. 2, the testing method comprises the following steps:
s1, moving the frame body 2 until the testing heavy hammer 1 is positioned above the pile foundation to be tested; specifically, the electric universal wheels 71 can be controlled to rotate by the wireless terminal controller 8, so that the whole frame body 2 can move.
And S2, detecting the alignment degree and distance between the test weight 1 and the foundation pile 100 to be tested through the detection component 4, wherein the laser distance meter 42 is used for obtaining the distance between the foundation pile 100 to be tested and the test weight 1, and the laser centering instrument 41 is used for detecting the alignment degree between the test weight 1 and the foundation pile 100 to be tested.
S3, adjusting the position of the testing weight 1 to align the testing weight 1 with the foundation pile 100 to be tested, and the distance between the testing weight 1 and the foundation pile 100 to be tested reaches the testing height, specifically, the testing personnel can fine-tune the position of the testing weight 1 through the measurement data of the laser distance meter 42 and the laser centering instrument 41, and the wireless terminal controller 8 to align the testing weight 1 with the foundation pile 100 to be tested, and adjust the height of the testing weight 1 through the electric hoist 31, thereby improving the testing accuracy;
s4, adjusting the auxiliary supporting part 5 to enable the frame body 2 to be firmly placed on the ground and to be perpendicular to the horizontal ground, and on the basis, enabling the guide rail 21 to be perpendicular to the horizontal ground, and always impacting the foundation pile 100 to be tested in the vertical direction when the weight 1 is tested to freely fall.
S5, installing the sensor assembly 6 on the foundation pile 100 to be tested, wherein the sensor assembly 6 comprises a plurality of sensors, the sensors are symmetrically installed on the foundation pile 100 to be tested, and before the sensors are used, the accuracy of the sensors needs to be tested.
S6, releasing the test weight 1 to impact the foundation pile 100 to be tested in a free-fall manner, opening the hook 34 to release the test weight 1, allowing the test weight 1 to fall freely, and impacting the foundation pile 100 to be tested.
And S7, acquiring the force signal and the speed signal from the sensor assembly 6.
Through the steps S1-S7, high strain method detection of the foundation pile is completed once, automation of the high strain method detection can be achieved through the wireless terminal controller 8, and detection efficiency is greatly improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A testing device for foundation pile high strain method detection is characterized by comprising:
the testing heavy hammer is used for impacting the pile foundation to be tested;
the frame body is used for placing the test heavy hammer;
the lifting mechanism is arranged on the frame body, connected with the test heavy hammer and used for lifting the test heavy hammer to a test height;
the detection assembly is arranged on the frame body and used for detecting the alignment degree and distance between the test heavy hammer and the foundation pile to be detected;
the auxiliary supporting component is connected with the frame body and is used for adjusting the verticality of the frame body and the ground;
and the sensor component is arranged on the foundation pile to be tested and used for acquiring a stress signal and a speed signal of the pile foundation to be tested when the foundation pile to be tested is impacted by the test heavy hammer.
2. The testing device as claimed in claim 1, wherein a guide rail is vertically disposed in the frame, and the testing weight is disposed in the guide rail and moves up and down in the guide rail.
3. The test device of claim 2, wherein a rail cross brace is disposed horizontally within the rail.
4. A test device according to claim 2 or 3, further comprising: one end of the auxiliary supporting component is arranged on the position adjusting component, and the other end of the auxiliary supporting component is connected with the frame body; the position adjustment part includes: the electronic universal wheel, electronic universal wheel is provided with the service brake.
5. The test device of claim 4, wherein the auxiliary support member comprises: the lifting jack is arranged on the electric universal wheel;
one end of the outer side diagonal brace is arranged on the jack, and the other end of the outer side diagonal brace is connected with the middle part of the frame body;
one end of the middle diagonal brace is arranged on the jack, and the other end of the middle diagonal brace is connected with the bottom of the frame body;
one end of the bottom inclined supporting rod is arranged on the jack, and the other end of the bottom inclined supporting rod is connected with the guide rail.
6. The testing device of claim 5, wherein the detecting assembly comprises a plurality of laser alignment instruments disposed on the guide rail for detecting the alignment degree of the testing weight and the foundation pile to be tested.
7. The testing device as claimed in claim 6, wherein the detecting assembly further comprises a laser distance measuring device for obtaining the distance between the foundation pile to be tested and the testing weight.
8. The test device of claim 7, further comprising: and the wireless terminal controller is connected with the position adjusting component through a wireless network and is used for controlling the movement of the position adjusting component.
9. The testing device of claim 1, wherein the lifting mechanism comprises: the electric hoist, the side pulley, the centering pulley and the lifting hook;
the electric hoist, the measuring pulley and the centering pulley are all arranged on the frame body, and a steel strand of the electric hoist is wound outside the measuring pulley and the centering pulley and extends into the guide rail; the lifting hook is fixed at the tail end of the steel strand.
10. A test method for foundation pile high strain method detection, characterized in that a test device according to any one of claims 1-9 is used, the test method comprising the steps of:
moving the frame body until the testing heavy hammer is positioned above the pile foundation to be tested;
detecting the alignment degree and distance between the test heavy hammer and the foundation pile to be tested through the detection assembly;
adjusting the position of the test heavy hammer to align the test heavy hammer with the foundation pile to be tested, wherein the distance between the heavy hammer and the foundation pile to be tested reaches the test height;
adjusting the auxiliary supporting component to enable the frame body to be vertical to the horizontal ground;
installing the sensor assembly on the foundation pile to be detected;
releasing the test heavy hammer to impact the foundation pile to be tested in a free-falling mode;
force and velocity signals are acquired from the sensor assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010987492.3A CN112095683A (en) | 2020-09-18 | 2020-09-18 | Testing device and testing method for high strain method detection of foundation pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010987492.3A CN112095683A (en) | 2020-09-18 | 2020-09-18 | Testing device and testing method for high strain method detection of foundation pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404095A (en) * | 2021-04-12 | 2021-09-17 | 昆山求正工程质量检测有限公司 | Detection equipment and detection method for high strain of foundation pile |
| CN114111582A (en) * | 2021-12-13 | 2022-03-01 | 西华大学 | Pile foundation heavy hammer alignment device and application method |
| CN114541492A (en) * | 2022-01-27 | 2022-05-27 | 中铁十六局集团南方工程有限公司 | Single pile bearing capacity detection device for foundation stirring pile-forming construction |
-
2020
- 2020-09-18 CN CN202010987492.3A patent/CN112095683A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404095A (en) * | 2021-04-12 | 2021-09-17 | 昆山求正工程质量检测有限公司 | Detection equipment and detection method for high strain of foundation pile |
| CN113404095B (en) * | 2021-04-12 | 2022-03-01 | 昆山求正工程质量检测有限公司 | Detection equipment and detection method for high strain of foundation pile |
| CN114111582A (en) * | 2021-12-13 | 2022-03-01 | 西华大学 | Pile foundation heavy hammer alignment device and application method |
| CN114111582B (en) * | 2021-12-13 | 2023-06-16 | 西华大学 | Pile foundation heavy hammer alignment device and application method |
| CN114541492A (en) * | 2022-01-27 | 2022-05-27 | 中铁十六局集团南方工程有限公司 | Single pile bearing capacity detection device for foundation stirring pile-forming construction |
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