Pile foundation high strain detection device

Abstract

The utility model relates to a pile foundation high strain detection device, which comprises a supporting seat comprising a main body, a guide rod and a plurality of limiting clamping grooves, the main body is arranged at the pile top of a to-be-detected pile, the guide rod is vertically and fixedly arranged at the center of the top surface of the main body, and the guide rod and the center of the pile top of the to-be-detected pile are located at the same position; the plurality of limiting clamping grooves are uniformly formed in the periphery of the main body, a limiting plate is detachably clamped in each limiting clamping groove, and the limiting plates abut against the to-be-detected pile; and the detection hammer is arranged right above the main body, and the center of the detection hammer is provided with a through hole for the guide rod to pass through. By means of the device, rapid centering and positioning of different pile diameters can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering construction, in particular to a pile foundation high strain detection device. BACKGROUND

[0002] In the field of foundation construction, there are many construction cases using precast piles (PHC piles, PC piles, steel pipe piles, etc.), and according to the specification requirements, a certain proportion of high strain detection of pile foundation is required to verify the bearing capacity and integrity of the pile foundation. At present, precast piles are generally sunk by static pressure, vibration or impact, and only the impact hammer with a guiding device among the above methods has the ability to detect high strain, and other sinking methods need to be equipped with corresponding special detection hammers.

[0003] According to the "Technical Code for Building Pile Detection" JGJ106, the high strain detection special hammering equipment should have a stable guiding device; the weight of the hammer should be symmetrical in shape, the height-diameter (width) ratio should not be less than 1, and the ratio of the weight of the hammer to the characteristic value of the vertical compressive bearing capacity of a single pile should not be less than 0.02; the center of gravity of the pile hammer should be centered with the pile top, the hammering device frame should be vertical, and a pile cushion should be provided on the pile head top; when using a free-falling hammer as the hammering equipment, the low-impact principle should be met, and the maximum hammering drop distance should not be greater than 2.5m.

[0004] In actual construction, various pile foundations with different diameters or variable diameters will be encountered, and it is difficult to realize high strain detection of pile foundations with different diameters under the premise of meeting the guiding and centering requirements of the specification. SUMMARY

[0005] The present application provides a pile foundation high strain detection device, which can solve the technical problem of being difficult to realize high strain detection of pile foundations with different diameters under the premise of meeting the guiding and centering requirements of the specification in the prior art.

[0006] The present application provides a pile foundation high strain detection device, which can solve the technical problem of being difficult to realize high strain detection of pile foundations with different diameters under the premise of meeting the guiding and centering requirements of the specification in the prior art.

[0007] In an embodiment, the limiting plate includes a head portion and a tail portion, and a slope is provided between the two portions, the slope is arranged opposite to the outer wall of the pile to be detected, the width of the head portion is greater than the width of the tail portion, the head portion is clamped in the limiting slot, and the top surface of the head portion is lower than the top surface of the main body.

[0008] In an embodiment, the support base further comprises a protection plate and a buffer pad, the buffer pad is arranged on the top surface of the main body, the protection plate is arranged on the top surface of the buffer pad, and the guide rod penetrates through the buffer pad and the protection plate and extends upward by a length.

[0009] In an embodiment, AB glue is used to bond between the main body and the buffer pad and between the buffer pad and the protection plate.

[0010] In an embodiment, a plurality of rib plates are welded at the connection between the guide rod and the protection plate.

[0011] In an embodiment, the projection of the detection hammer is located in the protection plate.

[0012] In an embodiment, the support base further comprises a plurality of lifting lugs evenly arranged on the edge of the top surface of the main body.

[0013] In an embodiment, the bottom end of the perforated hole is a tapered flared end.

[0014] In an embodiment, the top surface of the detection hammer is evenly provided with a plurality of lifting points for connecting the lifting wire rope.

[0015] In an embodiment, the material of the detection hammer is cast iron.

[0016] The technical scheme provided by the embodiments has the beneficial effects that:

[0017] In the embodiment, the main body is arranged on the top of the pile to be detected, so that the position of the pile top is relatively stable, the damage or inclination of the pile body caused by the falling of the detection hammer is avoided, and the bearing capacity and stability of the pile can be more accurately evaluated to provide reliable basis for engineering design and construction.

[0018] A plurality of limiting clamping grooves are formed around the main body, and a limiting plate is detachably clamped in each limiting clamping groove, and the limiting plate abuts against the pile to be detected. In this way, when the limiting plate is installed, the limiting plate can slide in the limiting clamping groove towards the center of the pile top of the pile to be detected until the limiting plate abuts against the pile to be detected, and the limiting plate is clamped in the current position by a clamping piece (such as a wedge-shaped gasket). In this way, even when facing pile foundation detection of various pile diameters or variable diameters, the support base can be well fixed and installed on the pile top of the pile to be detected.

[0019] By vertically fixing the guide rod at the center of the top surface of the main body, which is also the center of the pile top of the pile to be detected, and setting the detection hammer directly above the main body, and the center of the detection hammer is provided with a through hole for the guide rod to pass through, when the detection hammer detects the pile to be detected, the detection hammer can fall vertically along the length direction of the guide rod to the top surface of the main body through the through hole, so as to standardize the falling direction and falling position of the detection hammer, ensure the center of the detection hammer and the pile top of the pile to be detected are centered, smoothly complete the detection task of the pile to be detected, and ensure that the detection result meets the technical specification of pile detection. The technical problem that the pile foundation high strain detection of piles with different diameters is difficult to realize under the premise of meeting the guide centering requirements of the specification is solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a schematic diagram of a pile foundation high strain detection device in the embodiments of the present application;

[0022] Figure 2 is Figure 1 a schematic diagram of direction 1-1 in the middle;

[0023] Figure 3 is Figure 1 a schematic diagram of direction 2-2 in the middle.

[0024] In the figure:

[0025] 1, support seat; 11, main body; 12, guide rod; 13, limiting slot; 14, protection plate; 15, buffer pad; 16, lifting lug;

[0026] 2, limiting plate; 21, head; 22, tail;

[0027] 3, detection hammer; 31, through hole; 311, conical flared; 32, hoisting point;

[0028] 4, pile to be detected. DETAILED DESCRIPTION

[0029] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application, so that those skilled in the art can better understand the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] The pile high strain detection device provided by the embodiments of the present application can solve the technical problem that it is difficult to realize pile high strain detection of piles with different diameters under the premise of meeting the requirements of the guide centering in the specification.

[0031] Referring to Figures 1-3 , Figure 1 is a schematic view of the pile high strain detection device in the embodiments of the present application; Figure 2 is a schematic view of the direction 1-1 in Figure 1 ; Figure 3 is a schematic view of the direction 2-2 in Figure 1 . As shown in Figures 1-3 , the pile high strain detection device comprises a support seat 1 and a detection hammer 3. The support seat 1 comprises a main body 11, a guide rod 12 and a plurality of limiting grooves 13. The main body 11 is arranged at the top of a pile 4 to be detected. The guide rod 12 is vertically and fixedly arranged at the center of the top surface of the main body 11 and is located at the same position as the center of the top of the pile 4 to be detected. The plurality of limiting grooves 13 are evenly arranged around the main body 11. A limiting plate 2 is detachably arranged in each limiting groove 13, and the limiting plate 2 abuts against the pile 4 to be detected. The detection hammer 3 is arranged directly above the main body 11, and a through hole 31 is formed at the center of the detection hammer 3 for the guide rod 12 to pass through.

[0032] The to-be-detected pile 4 is generally a PHC pile, a PC pile, a steel pipe pile, etc., and the cross-sectional shape thereof is circular. The main body 11 is arranged on the pile top of the to-be-detected pile 4, and the main body 11 can be a steel plate with a certain thickness, which can cover the pile top of the to-be-detected pile 4 like a “cover”. The main body 11 is preferably a circular steel plate. The guide rod 12 plays a certain guiding role in the falling direction and falling position of the detection hammer 3. The cross-sectional shape of the guide rod 12 is the same as that of the through hole 31, and is preferably circular. A lubricant is coated between the guide rod 12 and the through hole 31 to reduce the friction caused by the relative sliding of the two. In addition, when the length of the guide rod 12 is greater than 2.5 m (in the specification, the maximum hammering falling distance should not be greater than 2.5 m), the detection hammer 3 is sleeved on the guide rod 12 before falling. When the length of the guide rod 12 is not greater than 2.5 m, the detection hammer 3 is located directly above the guide rod 12, and the through hole 31 of the detection hammer 3 is arranged opposite to the center of the guide rod 12. A plurality of limiting clamping grooves 13 are uniformly arranged on the periphery of the main body 11. The depth of the limiting clamping groove 13 is less than or equal to the thickness of the main body 11. When the depth of the limiting clamping groove 13 is less than the thickness of the main body 11, the limiting clamping groove 13 is arranged on the bottom surface of the main body 11, and the groove bottom is located inside the main body 11. When the depth of the limiting clamping groove 13 is equal to the thickness of the main body 11, the limiting clamping groove 13 penetrates the entire main body 11 upward from the bottom surface of the main body 11. In addition, before the limiting plate 2 is clamped in the limiting clamping groove 13, the installation position of the limiting plate 2 needs to be calculated in advance according to the pile diameter of the to-be-detected pile 4 and the size of the main body 11. After the limiting plate 2 is slid along the limiting clamping groove 13 to the installation position, a clamping piece (such as a wedge-shaped gasket) is used to clamp it.

[0033] In the embodiment, the main body 11 is arranged on the pile top of the pile 4 to be detected, so that the pile top position is relatively stable, and the pile body is prevented from being damaged or tilted when the detection hammer 3 falls. Meanwhile, the bearing capacity and stability of the pile can be more accurately evaluated, thereby providing a reliable basis for engineering design and construction. A plurality of limiting clamping grooves 13 are formed around the main body 11, and a limiting plate 2 is detachably clamped in each limiting clamping groove 13, and the limiting plate 2 abuts against the pile 4 to be detected. When the limiting plate 2 is installed, the limiting plate 2 can slide in the limiting clamping groove 13 towards the center of the pile top of the pile 4 to be detected until the limiting plate 2 abuts against the pile 4 to be detected, and the limiting plate 2 is clamped in the current position by a clamping member such as a wedge-shaped gasket. In this way, even when the pile foundation detection is performed on piles with different diameters or variable diameters, the support seat 1 can be well fixed and installed on the pile top of the pile 4 to be detected. The guide rod 12 is vertically fixed at the center of the top surface of the main body 11, which is also the center of the pile top of the pile to be detected. The detection hammer 3 is arranged above the main body 11, and a through hole 31 is formed in the center of the detection hammer 3 for the guide rod 12 to pass through. When the detection hammer 3 detects the pile 4 to be detected, the detection hammer 3 can be sleeved on the guide rod 12 through the through hole 31 and vertically fall along the length direction of the guide rod 12 to the top surface of the main body 11, so as to standardize the falling direction and position of the detection hammer 3, ensure that the center of the detection hammer 3 is centered with the pile top of the pile 4 to be detected, and successfully complete the detection task of the pile 4 to be detected, thereby ensuring that the detection result meets the technical specification for pile foundation detection. The technical problem that the pile foundation high strain detection cannot be performed on piles with different diameters or variable diameters while meeting the requirements of the guide centering in the prior art is solved.

[0034] Further, in an embodiment, as shown in Figure 1 the limiting plate 2 includes a head portion 21 and a tail portion 22, and a slope is formed between the head portion 21 and the tail portion 22. The slope is arranged opposite to the outer wall of the pile 4 to be detected. The width of the head portion 21 is greater than the width of the tail portion 22. The head portion 21 is clamped in the limiting clamping groove 13, and the top surface of the head portion 21 is lower than the top surface of the main body 11. In the embodiment, the limiting plate 2 mainly includes the head portion 21 and the tail portion 22, and a slope is formed between the head portion 21 and the tail portion 22. The slope is arranged opposite to the outer wall of the pile 4 to be detected. The head portion 21 with a greater width is clamped in the limiting clamping groove 13, so as to increase the contact area between the limiting plate 2 and the limiting clamping groove 13, and make the fixation between them more firm. In addition, the outer wall of the pile 4 to be detected is inclined outward, and the slope of the limiting plate 2 is arranged opposite to the pile 4 to be detected, which is conducive to clamping the limiting plate 2 in the limiting clamping groove 13 and further fixing the main body 11 on the pile top of the pile 4 to be detected. By arranging the top surface of the head portion 21 to be lower than the top surface of the main body 11, the detection hammer 3 can be prevented from impacting the limiting plate 2 when falling, thereby affecting the detection result.

[0035] Further, in an embodiment, as shown in Figure 2As shown, the support base 1 further comprises a protective plate 14 and a buffer pad 15, the buffer pad 15 is arranged on the top surface of the main body 11, the protective plate 14 is arranged on the top surface of the buffer pad 15, and the guide rod 12 penetrates the buffer pad 15 and the protective plate 14 and extends upward by a certain length. In this embodiment, the support base 1 further comprises a protective plate 14 and a buffer pad 15, and the material of the buffer pad 15 can be rubber, and the material of the protective plate 14 can be steel. By arranging the buffer pad 15 on the top surface of the main body 11, the protective plate 14 on the top surface of the buffer pad 15, and the guide rod 12 penetrating the buffer pad 15 and the protective plate 14 and extending upward by a certain length, the main body 11 can be effectively protected.

[0036] Further, in an embodiment, AB glue is used to bond between the main body 11 and the buffer pad 15, and between the buffer pad 15 and the protective plate 14. In this embodiment, the AB glue is a two-component epoxy resin adhesive with high bonding strength. By using AB glue to bond between the main body 11 and the buffer pad 15, and between the buffer pad 15 and the protective plate 14, the main body 11, the buffer pad 15 and the protective plate 14 can be firmly bonded together to form a stable and durable structure, thereby improving the load capacity of the support base 1.

[0037] Further, in an embodiment, a plurality of rib plates are welded at the connection between the guide rod 12 and the protective plate 14. In this embodiment, the rib plate is a common structural member commonly used in engineering to strengthen and increase the load capacity and stiffness of the structure. By welding a plurality of rib plates at the connection between the guide rod 12 and the protective plate 14, the stability of the guide rod 12 can be enhanced to prevent the connection between the guide rod 12 and the protective plate 14 from breaking or deforming, and to ensure that the guide rod 12 is perpendicular to the top surface of the main body 11.

[0038] Further, in an embodiment, as shown in Figure 1 the projection of the detection hammer 3 is located within the protective plate 14. In this embodiment, the projection of the detection hammer 3 is located within the protective plate 14, which means that the top surface of the protective plate 14 is larger than the bottom surface of the detection hammer 3, and when the detection hammer 3 falls, it can fall within the protective plate 14, thereby dispersing the impact force to the surrounding through the protective plate 14, effectively protecting the support base 1.

[0039] Further, in an embodiment, as shown in Figure 1 the support base 1 further comprises a plurality of lifting lugs 16 evenly arranged at the edge of the top surface of the main body 11. In this embodiment, the support base 1 further comprises a plurality of lifting lugs 16, and the plurality of lifting lugs 16 are evenly arranged at the edge of the top surface of the main body 11, which facilitates the displacement and installation of the support base 1.

[0040] Further, in an embodiment, as shown in Figure 1As shown, the bottom end of the perforation 31 is a tapered flange 311. In this embodiment, when the length of the guide rod 12 is limited and the total length is not greater than 2.5m (in the specification, the maximum hammering drop distance should not be greater than 2.5m), the guide rod 12 has not entered the perforation 31 of the detection hammer 3 before the detection hammer 3 falls. By setting the bottom end of the perforation 31 as a tapered flange 311, the guide rod 12 is more easily guided into the perforation 31.

[0041] Further, in an embodiment, as shown in Figure 1 As shown, the top surface of the detection hammer 3 is uniformly provided with a plurality of hoisting points 32 for connecting the hoisting wire. In this embodiment, by uniformly providing a plurality of hoisting points 32 on the top surface of the detection hammer 3 for connecting the hoisting wire, the hoisting unit can easily hoist and use the detection hammer 3. The hoisting unit generally uses a decoupler, and there are various finished products on the market to choose from. The specific decoupling methods include electric shaft penetration, magnetic force, and mechanical buckle flip, etc., and the bearing capacity meets the requirements of the weight of the detection hammer 3 and other loads.

[0042] Further, in an embodiment, the material of the detection hammer 3 is cast iron. In this embodiment, the hardness, wear resistance and compressive strength of cast iron are all outstanding, and the detection hammer 3 made of cast iron also has these characteristics. In addition, cast iron is relatively cheap, which greatly reduces the production cost of the detection hammer 3.

[0043] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower", etc. are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0045] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A pile foundation high strain detection device, characterized in that, The utility model relates to a support seat (1) and detection hammer (3), support seat (1) including main part (11), guide rod (12) and a plurality of limit card slot (13), main part (11) sets up at the pile top of the pile to be detected (4), guide rod (12) vertically fixed in the center of the top surface of main part (11) is with the pile top center of the pile to be detected (4) in the same position, a plurality of limit card slot (13) evenly sets up in the four quarters of main part (11), each limit card slot (13) can detachably card sets up limit board (2) in, and limit board (2) is in abutment with the pile to be detected (4); Detection hammer (3) sets up in the direct upper of main part (11), and the center of detection hammer (3) is provided with the perforation (31) of the guide rod (12) through. Limit board (2) includes head (21) and tail (22), between two there is inclined surface, the inclined surface is opposite with the outer wall of the pile to be detected (4) setting, the width of head (21) is greater than the width of tail (22), head (21) card sets up in limit card slot (13), and the top surface of head (21) is lower than the top surface of main part (11).

2. A pile high strain detection apparatus as claimed in claim 1, wherein, Support seat (1) still includes protection plate (14) and buffer pad (15), buffer pad (15) sets up in the top surface of main part (11), protection plate (14) sets up in the top surface of buffer pad (15), guide rod (12) penetrates buffer pad (15) and protection plate (14), and extends upwards a certain length.

3. The pile high strain detection apparatus of claim 1, wherein AB glue is used between main part (11) and buffer pad (15) and between buffer pad (15) and protection plate (14).

4. A pile high strain detection apparatus as claimed in claim 3, wherein, A plurality of muscle plates are welded between the connecting part of guide rod (12) and protection plate (14).

5. A pile high strain detection apparatus as claimed in claim 3, wherein The projection of detection hammer (3) is located in protection plate (14).

6. A pile high strain detection apparatus as claimed in claim 3, wherein, Support seat (1) still includes a plurality of lifting lugs (16) evenly arranged on the top edge of main part (11).

7. The pile high strain detection apparatus of claim 1, wherein The bottom end of perforation (31) is a tapered flared end (311).

8. The pile high strain detection apparatus of claim 1, wherein A plurality of lifting points (32) are evenly arranged on the top surface of detection hammer (3), and the lifting points (32) are connected with the lifting steel wire rope.

9. The pile high strain detection apparatus of claim 1, wherein The material of detection hammer (3) is cast iron.

10. The pile high strain detection apparatus of claim 1, wherein ​

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