A large strain test device for pile foundation

Abstract

This invention relates to the field of strain testing equipment technology, and discloses a large strain testing device for pile foundations, including a main component, a support frame, four guide plates fixed to the inner wall of the support frame, a counterweight sliding between the four guide plates, a blocking seat fixed to one side of each guide plate by bolts, a winch fixed to the top of the support frame, a winding rope wound on the winch, and a positioning ring fixed to the support frame; and a connecting component. The beneficial effects of this invention are: by setting up the connecting component, the connecting seat and the locking seat can automatically complete the docking, achieving a stable connection without manual assistance; during release, the limit is released by an electric actuator, enabling fully automated operation, reducing the safety hazards of personnel intervention in heavy object operations, and significantly shortening the test interval time; through the coordinated force of the cable and the connecting rope, it is ensured that the counterweight will not fall off during hoisting, significantly improving the stability and safety of the equipment operation.

Description

Technical Field

[0001] This invention relates to the field of strain testing equipment technology, and in particular to a large strain testing device for pile foundations. Background Technology

[0002] In the field of pile foundation engineering quality testing, large strain test is a key means to evaluate the vertical bearing capacity and integrity of piles. Its core principle is to generate stress waves by having a heavy hammer (counterweight) fall freely and impact the top of the pile, and then use sensors to collect data for analysis.

[0003] Existing large-strain pile foundation testing equipment has several limitations in practical operation: First, equipment installation and commissioning rely on auxiliary machinery such as cranes, requiring the crane to lift the counterweight and repeatedly adjust its position, which not only increases equipment investment and site occupation, but also prolongs test preparation time and reduces work efficiency due to machinery scheduling; Second, the connection between the counterweight and the lifting device requires manual assistance, requiring operators to work under or near the heavy object, posing safety hazards such as being hit or crushed, and the low precision of manual connection makes it easy for the counterweight to fall off due to unstable connection; Third, the base of the testing equipment lacks a convenient leveling adjustment mechanism, and when the site is uneven, the falling trajectory of the counterweight is prone to deviating from the vertical line, resulting in uneven distribution of impact energy and affecting the accuracy of test data. Summary of the Invention

[0004] In view of the problems existing in the above and / or existing large strain test equipment for pile foundations, the present invention is proposed.

[0005] Therefore, the problem that this invention aims to solve is that the connection between the counterweight and the lifting device is inconvenient when using existing large strain test equipment for pile foundations.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pile foundation large strain test device, which includes a main component, including a support frame, four guide plates fixed on the inner wall of the support frame, a counterweight block sliding between the four guide plates, a blocking seat fixed on one side of the guide plate by bolts, a winch fixed on the top of the support frame, a winding rope wound on the winch, and a positioning ring fixed on the support frame;

[0007] A connecting component, disposed at the end of the winding rope, includes a connector. The connector includes a support plate fixed to the end of the winding rope. A cable is fixed to the bottom of the support plate. A connecting plate is fixed to the other end of the cable. A connecting seat is fixed to the bottom of the connecting plate. An insert block slides inside the connecting seat. A snap-fit ​​seat is fixed to the top of the counterweight block. The inner wall of the snap-fit ​​seat has a chamfer and a connecting groove. The insert block can be inserted into the connecting groove.

[0008] As a preferred embodiment of the large strain test equipment for pile foundations described in this invention, the connecting assembly further includes a driving component disposed within the connecting seat. The driving component includes a lifting pin that slides within the connecting seat. A first spring is fixed inside the lifting pin, and the other end of the first spring is fixed to the inner wall of the connecting seat. An arc groove is formed on the surface of the insert block, and the end of the lifting pin is inserted into the arc groove.

[0009] As a preferred embodiment of the large strain test equipment for pile foundations described in this invention, the driving component further includes an extrusion plate fixed to one side of the insert block, an extrusion cone fixed inside the snap-fit ​​seat, a magnetic ring fixed inside the connecting seat, a metal sheet fixed inside the snap-fit ​​seat, and an extrusion surface formed on the extrusion plate.

[0010] In a preferred embodiment of the large strain test equipment for pile foundations described in this invention, the connecting assembly further includes a limiting member disposed within the connecting seat. The limiting member includes a limiting seat that slides within the connecting seat, a connecting rod fixed to the top of the limiting seat, and a connecting ring fixed to the top of the connecting rod.

[0011] As a preferred embodiment of the large strain test equipment for pile foundations described in this invention, the limiting component further includes a connecting rope fixed to the top of the connecting ring, the other end of the connecting rope being fixed to the bottom of the support plate, and a second spring being fixed between the support plate and the connecting plate.

[0012] In a preferred embodiment of the large strain test equipment for pile foundations described in this invention, the connecting assembly further includes a positioning element disposed on the top of the connecting seat. The positioning element includes a support plate fixed to the surface of the connecting ring, a movable plate slidingly disposed at the bottom of the support plate, and a positioning seat fixed at the top of the movable plate.

[0013] As a preferred embodiment of the large strain test equipment for pile foundation described in this invention, the positioning component further includes a slide rail fixed to the bottom of the moving plate, the top of the connecting seat is provided with a slide groove, the slide rail slides in the slide groove, and an unlocking plate is fixed to the top of the moving plate.

[0014] As a preferred embodiment of the large strain test equipment for pile foundation described in this invention, the top of the connecting seat is provided with a power component, the power component includes a compression sleeve that slides within the moving plate, a third spring is fixed inside the compression sleeve, and the other end of the third spring is fixed to the inner wall of the moving plate.

[0015] As a preferred embodiment of the large strain test equipment for pile foundations described in this invention, the power component further includes a push plate fixed to one side of the two extrusion sleeves, an electric push rod fixed to one side of the push plate, a mounting seat fixed on the electric push rod, and the mounting seat fixed to the top of the connecting seat by bolts.

[0016] As a preferred embodiment of the large strain test equipment for pile foundations described in this invention, the main component further includes a support base fixed to the surface of the support frame, and a hydraulic leg is fixed on the support base.

[0017] The beneficial effects of this invention are as follows: by setting the connecting component, the connecting seat and the snap-fit ​​seat can automatically complete the docking, and a stable connection can be completed without manual assistance. When released, the limit can be released by driving the electric push rod. The whole process is automated, reducing the safety hazards of personnel intervention in heavy object operation and greatly shortening the test interval time.

[0018] By leveraging the combined force of the cables and connecting ropes, the counterweights can be prevented from falling off during hoisting, significantly improving the stability and safety of the equipment operation.

[0019] The counterweight can be hoisted using a winch, thus eliminating the need for cranes or other mechanical equipment and saving work space;

[0020] By adjusting the length of the hydraulic leg output end, the balance of the support frame can be adjusted, thereby improving the accuracy of test data. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0022] Figure 1 This is a structural diagram of a large strain test device for pile foundations.

[0023] Figure 2 This is a structural diagram of the counterweight block for a large strain test device for pile foundations.

[0024] Figure 3 For pile foundation large strain test equipment Figure 2 A partial enlarged structural diagram of point A in the middle.

[0025] Figure 4 This is a cross-sectional view of the clamping seat of the large strain test equipment for pile foundations.

[0026] Figure 5 For pile foundation large strain test equipment Figure 4 Enlarged view of the structure at point B in the middle.

[0027] Figure 6 This is a structural diagram of the connection seat for a large strain test device for pile foundations.

[0028] Figure 7This is a cross-sectional view of the limiting seat of the large strain test equipment for pile foundations.

[0029] Figure 8 This is a structural diagram of the insert block for a large strain test device for pile foundations.

[0030] Figure 9 This is a cross-sectional view of the extrusion sleeve of the large strain test equipment for pile foundations.

[0031] Figure 10 This is a cross-sectional view of the slide rail structure of the large strain test equipment for pile foundations.

[0032] In the diagram: Main component 1; Support frame 11; Four guide plates 14; Counterweight 15; Stopping seat 16; Winch 17; Winding rope 18; Positioning ring 19; Connecting component 2; Connector 21; Support plate 211; Cable 212; Connecting plate 213; Connecting seat 214; Insert block 215; Snap-fit ​​seat 216; Chamfer 216-1; Connecting groove 216-2; Driving component 22; Lifting pin 221; First spring 222; Arc groove 215-1; Extrusion plate 223; Extrusion cone 224 ; Magnetic ring 225; Metal sheet 226; Extrusion surface 223-1; Limiting component 23; Limiting seat 231; Connecting rod 232; Connecting ring 233; Connecting rope 234; Second spring 235; Positioning component 24; Support plate 241; Moving plate 242; Positioning seat 243; Slide rail 244; Slide groove 214-1; Unlocking plate 245; Power component 25; Extrusion sleeve 251; Third spring 252; Push plate 253; Electric push rod 254; Mounting seat 255; Support seat 12; Hydraulic leg 13. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0036] Example 1

[0037] Reference Figures 1-5 and Figure 7This is the first embodiment of the present invention, which provides a large strain test device for pile foundations. The large strain test device for pile foundations includes a main component 1, including a support frame 11. Four guide plates 14 are fixed to the inner wall of the support frame 11, and counterweights 15 slide between the four guide plates 14 to guide the lifting and lowering of the counterweights 15, so that the counterweights 15 descend vertically under their weight. Each guide plate 14 has a stop seat 16 fixed to one side by bolts. The stop seat 16 is used to support the counterweights 15. When the support frame 11 is lifted, the counterweights 15 are lifted together by the support of the stop seats 16, so that the counterweights 15 fall on the top of the pile foundation. The support frame 11 is located outside the pile foundation. A winch 17 is fixed to the top of the support frame 11. A winding rope 18 is wound on the winch 17. A positioning ring 19 is fixed on the support frame 11. The positioning ring 19 is located below the winch 17. One end of the winding rope 18 is fixed to the winch 17 and can be wound by the winch 17. The winding rope 18 passes through the through hole of the positioning ring 19. Both the upper and lower ends of the through hole of the positioning ring 19 are provided with rounded corners to prevent the winding rope 18 from being worn by the positioning ring 19 when sliding. The positioning ring 19 is located on the central axis of the support frame 11, so that when the winding rope 18 passes through the positioning ring 19 to hoist the counterweight 15, it is connected to the center of gravity of the counterweight 15, so that the counterweight 15 will not shift.

[0038] The connecting component 2, located at the end of the winding rope 18, includes a connector 21. The connector 21 includes a support plate 211 fixed to the end of the winding rope 18. A cable 212 is fixed to the bottom of the support plate 211, and a connecting plate 213 is fixed to the other end of the cable 212. In the figure, the cable 212 is in a loose state. A connecting seat 214 is fixed to the bottom of the connecting plate 213. Four inserts 215 slide inside the connecting seat 214. A snap-fit ​​seat 216 is fixed to the top of the counterweight 15. The inner wall of the snap-fit ​​seat 216 has a chamfer 216-1 and a connecting groove 216-2. The inserts 215 can be inserted into the connecting groove 216-2.

[0039] When the insert 215 is inserted into the connecting slot 216-2, the winding rope 18 pulls the support plate 211, which in turn pulls the connecting plate 213 through the cable 212. This causes the connecting plate 213 to lift the connecting seat 214 upward, thereby causing the connecting seat 214 to move the locking seat 216 upward through the insert 215. This, in turn, causes the locking seat 216 to move the counterweight 15 upward.

[0040] The end of the insert 215 is chamfered. After the insert 215 is inserted into the connecting groove 216-2, the snap-fit ​​seat 216 can press the chamfer at the end of the insert 215, so that the insert 215 can retract into the connecting seat 214.

[0041] Example 2

[0042] Reference Figure 4 , Figure 5 , Figure 7 and Figure 8 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0043] Specifically, the connecting component 2 also includes a driving component 22 disposed in the connecting seat 214. The driving component 22 includes a lifting pin 221 that slides in the connecting seat 214. A first spring 222 is fixed in the lifting pin 221. The other end of the first spring 222 is fixed to the inner wall of the connecting seat 214. An arc groove 215-1 is opened on the surface of the insert block 215. The end of the lifting pin 221 is inserted into the arc groove 215-1.

[0044] When the first spring 222 is in a compressed state, the end of the lifting pin 221 can be inserted into the arc groove 215-1 by the elastic force of the first spring 222, thereby initially positioning the position of the insert block 215. When the counterweight 15 drives the snap-fit ​​seat 216 to press the chamfer at the end of the insert block 215, the insert block 215 can be retracted into the connecting seat 214, thereby moving the arc groove 215-1 away from the end of the lifting pin 221.

[0045] Specifically, the driving component 22 also includes an extrusion plate 223 fixed to one side of the insert block 215, an extrusion cone 224 fixed in the snap-fit ​​seat 216, a magnetic ring 225 fixed in the connecting seat 214, a metal sheet 226 fixed in the snap-fit ​​seat 216, and an extrusion surface 223-1 opened on the extrusion plate 223.

[0046] When the connector 214 falls into the snap-fit ​​seat 216, the magnetic ring 225 will attract the metal sheet 226 as the connector 214 falls, thereby increasing the downward force of the connector 214. At this time, the extrusion cone 224 can extrude the extrusion surfaces 223-1 of the four extrusion plates 223, thereby causing the extrusion plates 223 to push the insert block 215 into the connecting groove 216-2.

[0047] Specifically, the connecting component 2 also includes a limiting member 23 disposed within the connecting seat 214. The limiting member 23 includes a limiting seat 231 that slides within the connecting seat 214. A connecting rod 232 is fixed to the top of the limiting seat 231. The connecting rod 232 slides within the connecting seat 214. A connecting ring 233 is fixed to the top of the connecting rod 232.

[0048] When the connecting ring 233 rises, the limiting seat 231 can be driven to rise through the connecting rod 232. Two limiting seats 231 are provided on one side of each end of the insert 215 to limit the insert 215, so that the insert 215 cannot slide into the connecting seat 214, and the other end of the insert 215 stays in the connecting groove 216-2. In this way, when the connecting seat 214 rises, it can drive the locking seat 216 to move upward, thereby driving the counterweight 15 to move upward.

[0049] Specifically, the limiting component 23 also includes a connecting rope 234 fixed to the top of the connecting ring 233, the other end of the connecting rope 234 fixed to the bottom of the support plate 211, and a second spring 235 fixed between the support plate 211 and the connecting plate 213. The second spring 235 is currently in a stretched state under the pull of the weight of the connecting seat 214.

[0050] When the winding rope 18 is pulled upward, it can drive the support plate 211 to move upward, thereby causing the support plate 211 to pull the connecting rope 234, which in turn causes the connecting rope 234 to drive the connecting ring 233 to move upward. This causes the connecting ring 233 to drive the limiting seat 231 to move upward through the connecting rod 232, thereby moving the limiting seat 231 to the end of the insert 215 and limiting the insert 215 so that the insert 215 cannot slide into the connecting seat 214. At this time, the connecting rope 234 and the cable 212 are both in a taut state.

[0051] The connecting rope 234 has a certain elasticity. When the connecting rope 234 and the cable 212 are both taut, if an external force is applied to the connecting rope 234, the connecting rope 234 can be stretched, thereby allowing the connecting ring 233 to move downward in the current state.

[0052] Example 3

[0053] Reference Figures 1-10 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0054] Specifically, the connecting component 2 also includes a positioning element 24 disposed on the top of the connecting seat 214. The positioning element 24 includes a support plate 241 fixed to the surface of the connecting ring 233. There are two support plates 241, which are symmetrically arranged. A movable plate 242 slides on the bottom of the support plate 241, and a positioning seat 243 is fixed on the top of the movable plate 242.

[0055] When the connecting ring 233 moves the limiting seat 231 upward to the end of the insert block 215 via the connecting rod 232, the support plate 241 will rise synchronously. At this time, moving the moving plate 242 can move the positioning seat 243 below the support plate 241, thereby supporting the support plate 241 and preventing the connecting ring 233 from descending to reset.

[0056] Specifically, the positioning component 24 also includes a slide rail 244 fixed to the bottom of the movable plate 242. The top of the connecting seat 214 is provided with a slide groove 214-1. The slide rail 244 slides in the slide groove 214-1 to limit the movable plate 242 so that the movable plate 242 can slide stably. The top of the movable plate 242 is fixed with an unlocking plate 245.

[0057] When the connecting ring 233 needs to move downward, the moving plate 242 moves in the opposite direction, causing the unlocking plate 245 to move closer to the support plate 241. At this time, the positioning seat 243 moves away from the support plate 241, releasing the support of the support plate 241. When the arc surface of the unlocking plate 245 presses against the support plate 241, the support plate 241 can cause the connecting ring 233 to move downward, causing the connecting ring 233 and the connecting rod 232 to move the limiting seat 231 downward, thereby resetting the limiting seat 231 and releasing the limitation on the insert block 215. This allows the insert block 215 to retract into the connecting seat 214, thereby releasing the limitation on the locking seat 216. The locking seat 216 and the counterweight 15 fall downward under the action of gravity, thus impacting the pile foundation below.

[0058] Specifically, a power component 25 is provided on the top of the connecting seat 214. The power component 25 includes a compression sleeve 251 that slides within the moving plate 242. A third spring 252 is fixed inside the compression sleeve 251. The other end of the third spring 252 is fixed to the inner wall of the moving plate 242. The third spring 252 is in a stretched state. When the connecting ring 233 drives the support plate 241 to rise, the third spring 252 can pull the moving plate 242, thereby causing the moving plate 242 to drive the positioning seat 243 to move below the support plate 241, thereby supporting the support plate 241. At this time, the compression sleeve 251 moves to the inner bottom wall of the moving plate 242.

[0059] Specifically, the power component 25 also includes a push plate 253 fixed to one side of the two extrusion sleeves 251, an electric push rod 254 fixed to one side of the push plate 253, a mounting seat 255 fixed on the electric push rod 254, and the mounting seat 255 fixed to the top of the connecting seat 214 by bolts.

[0060] Activating the electric actuator 254 allows it to push the push plate 253, which in turn causes the push plate 253 to drive the two compression sleeves 251 to push the moving plate 242. This causes the moving plate 242 to move the unlocking plate 245 closer to the support plate 241. At this time, the positioning seat 243 moves away from the support plate 241, releasing the support of the support plate 241.

[0061] Specifically, the main component 1 also includes a support seat 12 fixed to the surface of the support frame 11. A hydraulic leg 13 is fixed on the support seat 12. The hydraulic leg 13 is a prior art technology. The hydraulic leg 13 can extend and retract under the drive of hydraulic force, thereby adjusting the length of the output end of each hydraulic leg 13. A balance detection mechanism is provided on the support frame 11 to detect the balance of the support frame 11. When the support frame 11 is detected to be tilted, the length of the output end of each hydraulic leg 13 can be adjusted to make the support frame 11 in a balanced state. At this time, the guide plate 14 does not affect the free fall motion of the counterweight 15.

[0062] In summary, our invention has the following beneficial effects:

[0063] 1. Automatic connection and locking improve operational efficiency and safety: In the connection component 2, the connecting seat 214 and the snap-fit ​​seat 216 achieve initial docking through the chamfer 216-1, the magnetic ring 225 and the metal sheet 226 enhance the adhesion, the extrusion cone 224 pushes the insert block 215 into the connection groove 216-2, and the limiting seat 231 of the limiting component 23 locks the position, so that a stable connection can be completed without manual assistance; when releasing, the unlocking plate 245 is driven by the electric push rod 254 to release the limit, and the whole process is automated, reducing the safety hazards of personnel intervention in heavy object operation and greatly shortening the test interval time;

[0064] 2. The connection structure features an adaptive and anti-detachment design to enhance equipment stability: The first spring 222 in the drive component 22 pushes the lifting pin 221 to embed into the arc groove 215-1 of the insert block 215, achieving initial positioning; the limit seat 231 rigidly limits the insert block 215, and combined with the coordinated force of the cable 212 and the connecting rope 234, it ensures that the counterweight block 15 will not fall off during the hoisting process, significantly improving the stability and safety of equipment operation.

[0065] When the counterweight 15 needs to be hoisted, the winch 17 first unwinds the winding rope 18, causing the connecting seat 214 to fall into the chamfer 216-1 of the locking seat 216. The chamfer 216-1 is used to make the connecting seat 214 fall into the locking seat 216.

[0066] As the connecting seat 214 falls, the magnetic ring 225 attracts the metal sheet 226, thereby increasing the downward force of the connecting seat 214. At this time, the extrusion cone 224 can extrude the extrusion surfaces 223-1 of the four extrusion plates 223, thereby causing the extrusion plates 223 to push the insert block 215 into the connecting groove 216-2.

[0067] At this point, the winch 17 winds up the winding rope 18. The winding rope 18 is pulled upward, which drives the support plate 211 to move upward. This causes the support plate 211 to pull the connecting rope 234, which in turn causes the connecting rope 234 to move the connecting ring 233 upward. This causes the connecting ring 233 to move the limiting seat 231 upward via the connecting rod 232. This moves the limiting seat 231 to the end of the insert block 215, limiting the insert block 215 and preventing it from sliding into the connecting seat 214. At this point, the connecting rope 234 and the cable 212 are both taut.

[0068] When the connecting ring 233 drives the support plate 241 to rise, the third spring 252 pulls the moving plate 242, thereby causing the moving plate 242 to move the positioning seat 243 below the support plate 241, thus supporting the support plate 241 and preventing the connecting ring 233 from moving downward.

[0069] The cable 212 pulls the connecting plate 213, causing the connecting plate 213 to lift the connecting seat 214 upward, thereby causing the connecting seat 214 to drive the locking seat 216 upward through the insert block 215, which in turn causes the locking seat 216 to drive the counterweight block 15 upward.

[0070] When the counterweight 15 needs to be released, the electric actuator 254 is activated, which pushes the push plate 253. The push plate 253 then drives the two compression sleeves 251 to push the moving plate 242. This causes the moving plate 242 to move the unlocking plate 245 closer to the support plate 241. At this time, the positioning seat 243 moves away from the support plate 241, releasing the support of the support plate 241. The arc surface of the unlocking plate 245 presses against the support plate 241, causing the support plate 241 to move the connecting ring 233 downward. This causes the connecting ring 233 and the connecting rod 232 to move the limiting seat 231 downward, thus resetting the limiting seat 231 and releasing the limitation on the insert 215. The insert 215 can then retract into the connecting seat 214, thereby releasing the limitation on the locking seat 216. The locking seat 216 and the counterweight 15 fall downward under the action of gravity, thus impacting the pile foundation below.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large strain test device for pile foundations, characterized in that: include, The main component (1) includes a support frame (11), four guide plates (14) are fixed on the inner wall of the support frame (11), a counterweight (15) slides between the four guide plates (14), a stop seat (16) is fixed on one side of the guide plate (14) by bolts, a winch (17) is fixed on the top of the support frame (11), a winding rope (18) is wound on the winch (17), and a positioning ring (19) is fixed on the support frame (11). A connecting component (2) is provided at the end of the winding rope (18) and includes a connector (21). The connector (21) includes a support plate (211) fixed to the end of the winding rope (18). A cable (212) is fixed at the bottom of the support plate (211). A connecting plate (213) is fixed at the other end of the cable (212). A connecting seat (214) is fixed at the bottom of the connecting plate (213). An insert (215) slides in the connecting seat (214). A snap-fit ​​seat (216) is fixed at the top of the counterweight (15). A chamfer (216-1) and a connecting groove (216-2) are provided on the inner wall of the snap-fit ​​seat (216). The insert (215) can be inserted into the connecting groove (216-2). The connecting assembly (2) further includes a driving component (22) disposed within the connecting seat (214). The driving component (22) includes a lifting pin (221) that slides within the connecting seat (214). A first spring (222) is fixed within the lifting pin (221), and the other end of the first spring (222) is fixed to the inner wall of the connecting seat (214). An arc groove (215-1) is formed on the surface of the insert (215), and the end of the lifting pin (221) is inserted into the arc groove (215-1). The driving component (22) also includes an extrusion plate (223) fixed to one side of the insert block (215), an extrusion cone (224) fixed inside the snap-fit ​​seat (216), a magnetic ring (225) fixed inside the connecting seat (214), a metal sheet (226) fixed inside the snap-fit ​​seat (216), and an extrusion surface (223-1) opened on the extrusion plate (223). The connecting assembly (2) further includes a limiting member (23) disposed within the connecting seat (214). The limiting member (23) includes a limiting seat (231) that slides within the connecting seat (214). A connecting rod (232) is fixed to the top of the limiting seat (231), and a connecting ring (233) is fixed to the top of the connecting rod (232). The limiting member (23) also includes a connecting rope (234) fixed to the top of the connecting ring (233), the other end of the connecting rope (234) being fixed to the bottom of the support plate (211), and a second spring (235) being fixed between the support plate (211) and the connecting plate (213).

2. The pile foundation large strain test equipment as described in claim 1, characterized in that: The connecting assembly (2) further includes a positioning element (24) disposed on the top of the connecting seat (214). The positioning element (24) includes a support plate (241) fixed to the surface of the connecting ring (233). A movable plate (242) slides on the bottom of the support plate (241), and a positioning seat (243) is fixed on the top of the movable plate (242).

3. The pile foundation large strain test equipment as described in claim 2, characterized in that: The positioning component (24) also includes a slide rail (244) fixed to the bottom of the moving plate (242), and a slide groove (214-1) is provided on the top of the connecting seat (214). The slide rail (244) slides in the slide groove (214-1), and an unlocking plate (245) is fixed on the top of the moving plate (242).

4. The pile foundation large strain test equipment as described in claim 3, characterized in that: The top of the connecting seat (214) is provided with a power component (25), the power component (25) includes a compression sleeve (251) that slides in the moving plate (242), a third spring (252) is fixed in the compression sleeve (251), and the other end of the third spring (252) is fixed to the inner wall of the moving plate (242).

5. The pile foundation large strain test equipment as described in claim 4, characterized in that: The power component (25) also includes a push plate (253) fixed to one side of the two extrusion sleeves (251), an electric push rod (254) fixed to one side of the push plate (253), a mounting seat (255) fixed on the electric push rod (254), and the mounting seat (255) fixed to the top of the connecting seat (214) by bolts.

6. The pile foundation large strain test equipment as described in claim 1 or 5, characterized in that: The main component (1) also includes a support seat (12) fixed on the surface of the support frame (11), and a hydraulic leg (13) is fixed on the support seat (12).

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