Pile head protection device for static load test

Abstract

The utility model discloses a pile head protection device for a static load test, which comprises a pile foundation body and a protection top seat, the axis of the pile foundation body is vertically arranged, the protection top seat is coaxially placed on the top end face of the pile foundation body, and a plurality of wing seats horizontally and radially are fixed on the periphery of the protection top seat in an extending manner. The bottoms of the wing seats are provided with sliding adjusting assemblies which can slide in the length direction to adjust the position and be locked. The protective top seat has the advantages that after the protective top seat is arranged on the top end face of the pile foundation body, the protective top seat can be detachably fixed to the top face of the pile foundation body in the mode that the clamping and fixing assemblies in the circumferential direction of the protective top seat are all pressed on the periphery of the pile foundation body, and the end face of a pile head is protected; the protective footstock is prevented from moving on the top end face of the pile foundation body, and the stability of the protective footstock in the use process of the static load test is improved.

Description

Technical Field

[0001] The utility model relates to the field of pile foundation detection auxiliary components, in particular to a pile head protection device used for static load test. Background Art

[0002] In order to ensure the safety of construction projects that have been built, are under construction, and will be built, it is an important task to test the foundations, building materials, construction technology, and building structures related to the buildings throughout the construction process. In the main structure, the pile foundation is a deep foundation consisting of a pile and a pile cap connected to the top of the pile (referred to as the cap) or a single pile foundation connected to the pile foundation by a column, referred to as the pile foundation. If the pile body is completely buried in the soil and the bottom of the cap is in contact with the soil, it is called a low cap pile foundation. If the upper part of the pile body is exposed to the ground and the bottom of the cap is above the ground, it is called a high cap pile foundation. The building pile foundation is usually a low cap pile foundation. Specifically, in the process of testing the pile foundation, the pile foundation static load test is a technology used in engineering to test the bearing capacity of the pile foundation. In terms of determining the ultimate bearing capacity of a single pile, it is currently the most accurate and reliable inspection method.

[0003] The usual practice for pile foundation static load test is as follows: a horizontal balance steel beam is installed on the horizontal supporting beam, and then a metal beam or concrete beam is laid on the horizontal balance steel beam to form a load-bearing platform. After that, counterweights are piled on this load-bearing platform to form a ballast body, and then the pile foundation is subjected to static load test.

[0004] During the entire static load test of the pile foundation, the load is concentrated on the end face of the pile head, and the pile head is easily damaged when it contacts the jack, resulting in low bearing capacity, which directly affects the bearing capacity of the pile foundation and may seriously affect the accuracy of the test data. Therefore, it is necessary to adopt certain protective measures for the end face of the pile head of the pile foundation. At present, when protecting the end face of the pile head, it is usually adopted to directly pad a reinforcing pad on the end face of the pile head, and then let the jack directly contact the reinforcing pad to apply pressure, so that the end face of the pile head is not directly in contact with the jack. The possibility of being damaged is reduced. However, since the reinforcing pad is directly placed on the end face of the pile head, its stability on the end face of the pile head is general. During the static load test, the reinforcing pad is easy to move and change its position. If the reinforcing pad is directly fixed to the end face of the pile head by bolts, the bolts will inevitably damage the end face of the pile head. At the same time, it is not easy to remove the reinforcing pad after the test. Utility Model Content

[0005] The purpose of the utility model is to provide a pile head protection device for static load test in order to solve the above-mentioned problem. After the protection top seat is placed on the top end surface of the pile basic body, the protection top seat can be detachably fixed to the top surface of the pile basic body to protect the pile head end surface by pressing a plurality of clamping and fixing components on the circumference of the protection top seat against the periphery of the pile basic body, thereby avoiding the protection top seat from moving around on the top end surface of the pile basic body. See the following description for details.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a pile head protection device for static load test, comprising a pile base body and a protection top seat, wherein the axis of the pile base body is vertically arranged and the top surface is coaxially provided with the protection top seat, a plurality of horizontal radial wing seats are fixedly extended from the periphery of the protection top seat, and the bottom of each wing seat is provided with a sliding adjustment component capable of slidingly adjusting the position and locking in the length direction;

[0008] The bottom of the sliding adjustment component is installed with a clamping and fixing component that can be pressed against the periphery of the pile basic body, and the clamping and fixing components are detachably fixed to the corresponding bottom of the wing seat through the sliding adjustment component, so that the protective top seat can be detachably fixed to the top end surface of the pile basic body by pressing multiple clamping and fixing components against the periphery of the pile basic body.

[0009] Preferably, the sliding adjustment components include a sliding groove and a sliding seat, the bottom surface of the wing seat is provided with the sliding groove along the length extension direction of the wing seat, the bottom of the sliding groove is open, the top of the sliding groove is vertically provided with a plurality of limiting holes, and the plurality of limiting holes of the same sliding groove are evenly distributed along the length direction of the corresponding wing seat, and the sliding groove is horizontally slidably matched with the sliding seat.

[0010] Preferably, the clamping and fixing components are installed on one side of the bottom surface of the slide seat, and the other side of the bottom surface of the slide seat is vertically opened with mounting holes, and the mounting holes are through holes and are vertically coaxial with a limiting hole corresponding to the slide slot, and the mounting holes are vertically coaxially slidably matched with limiting rods, and the top ends of the limiting rods are vertically slidably matched with the corresponding limiting holes, and the bottom ends of the limiting rods extending out of the bottom surface of the slide seat are coaxially fixed with handles, and the part of the limiting rod located between the corresponding handle and the bottom surface of the slide seat is coaxially gap-matched with a spring, and the two ends of the spring are respectively fixedly connected to the corresponding handle and the bottom surface of the slide seat.

[0011] Preferably, the slide grooves are all dovetail grooves or I-shaped grooves, and the outer ends of the slide grooves are open.

[0012] Preferably, the clamping and fixing components include vertical plates, studs and clamps, the vertical plates are vertically fixed on the bottom surfaces corresponding to the sliding seats and are arranged facing the periphery of the pile basic body, the middle portions of the vertical plates are vertically engaged and interspersed with the studs, and the studs are arranged radially along the pile basic body, the portions of the studs away from the periphery of the pile basic body and extending out of the surface of the vertical plates are coaxially engaged with locking nuts, the inner ends of the studs close to the periphery of the pile basic body are rotatably connected to a bearing seat, and the end surfaces of the bearing seats close to the pile basic body are fixed with the clamps, the clamps are arranged facing the periphery of the pile basic body, and the end surfaces close to the pile basic body are vertically provided with clamping grooves for pressing against the periphery of the pile basic body.

[0013] Preferably, the locking nuts are hand-tightened knurled nuts, the inner ends of the studs are coaxially fixed to the corresponding inner rings of the bearing seats, and the outer ends of the studs are coaxially fixed to rocker arms for convenient and effortless rotation of the studs.

[0014] Preferably, the clamping grooves are all through grooves in the vertical direction, and the cross-sectional shapes of the clamping grooves in the horizontal direction are all V-shaped.

[0015] Preferably, the inner walls of the clamping grooves are covered with a buffer lining fixed with a buffer material, and the horizontal cross-sectional shape of the buffer lining is also V-shaped.

[0016] Preferably, the vertical plate is provided with guide holes vertically above and below the studs, the guide holes are coaxially slidably fitted with guide rods, and the inner ends of the guide rods close to the corresponding clamps are vertically fixed to the surfaces of the clamps.

[0017] Preferably, the protective top seats are all circular plates, a plurality of the wing seats are evenly distributed in the circumferential direction, and handles for facilitating lifting are installed on both sides of the ends of the wing seats.

[0018] By using the pile head protection device for static load test, specifically in the process of using the pile basic body for static load test, when protecting the top surface of the pile head on the top of the pile basic body, after the protection top seat is placed on the top surface of the pile basic body, the protection top seat can be detachably fixed to the top surface of the pile basic body to protect the end surface of the pile head by pressing the plurality of clamping and fixing components on the circumferential direction of the protection top seat against the periphery of the pile basic body, thereby avoiding the protection top seat from moving around on the top surface of the pile basic body and improving the stability of the protection top seat during the static load test. Specifically, during operation, firstly, at the beginning, the slide seat and the corresponding slide groove are both horizontally slidably matched, and at the same time, the The limiting rods are vertically slidably matched with the corresponding limiting holes. At this time, the clamping and fixing assembly can be detachably fixed to the lower part of the wing seat corresponding to the periphery of the protective top seat by means of the horizontal sliding cooperation between the sliding seat and the sliding groove and the vertical sliding cooperation between the limiting rod and the limiting hole. The fixing combination method of the clamping and fixing assembly and the wing seat is simple and easy to operate, which makes it convenient to quickly combine the clamping and fixing assembly with the corresponding lower part of the wing seat for use. When operating the clamping and fixing assembly, multiple people stand at the position of one of the clamping and fixing assemblies respectively, and then all tighten the locking nut to approach the corresponding rocker arm, and then hold the corresponding rocker arm at the same time to drive the stud to rotate clockwise. In the embodiment, the stud is driven by the positive rotation of the stud to drive the clamping plate close to the periphery of the pile basic body so that the clamping groove of the clamping plate can be pressed against the periphery of the pile basic body, and then the protective top seat is fixed on the top surface of the pile basic body. It should be noted that the multiple clamping plates should be kept synchronized as much as possible when approaching the periphery of the pile basic body, and the multiple clamping grooves should be pressed against the outer surface of the pile basic body through coordination of multiple people. Then, the stud is kept from rotating and the locking nuts are tightened on the corresponding surfaces of the vertical plates, so as to prevent the stud from rotating naturally through the friction between the locking nut and the vertical plate, and at the same time, the locking nut is tightened to tighten the threaded engagement degree of the stud and the vertical plate. To further prevent the natural rotation of the stud, so as to ensure that the protective top seat is stably fixed and maintained on the top surface of the pile basic body. After the protective top seat is fixed on the top surface of the pile basic body, the static load test of the pile basic body can be started. During the static load test, the pressure jack directly contacts the top surface of the protective top seat when applying pressure to the top pile head of the pile basic body, but does not contact the top surface of the pile basic body, thereby reducing the possibility of the jack damaging the top surface of the pile basic body. After the test is completed, after loosening the locking nut, the clamping groove of the clamping plate can be moved away from the periphery of the pile basic body by reversing the stud counterclockwise to drive the clamping plate away from the pile basic body.The fixing of the protective top seat on the top surface of the pile basic body is then released and the protective top seat is disassembled. The fixing and disassembly method of the protective top seat on the top surface of the pile basic body is simple and easy to operate, which not only facilitates the quick fixing of the protective top seat on the pile basic body for static load testing, but also facilitates the timely disassembly of the protective top seat from the top surface of the pile basic body after the static load test is completed. When the protective top seat is used and disassembled, since the outer ends of the slide grooves of the sliding adjustment components are open, after the limiting rod is pulled down and out of the limiting hole, the sliding seat can slide horizontally along the slide groove and slide out from the outer end to disassemble the clamping and fixing component from the corresponding wing seat. The disassembly method of the clamping and fixing component and the wing seat is simple and easy to operate, which facilitates the removal of the clamping and fixing component for regular maintenance, and also facilitates the storage of the clamping and fixing component and the wing seat after they are separated. It is convenient for carrying and transporting, and before the protective top seat is placed on the top surface of the pile basic body with different outer diameters for fixing, since the number of the limiting holes of the sliding adjustment component is multiple, the initial distance between the clamping and fixing component and the periphery of the pile basic body can be adjusted by the sliding seat sliding horizontally along the sliding groove and the limiting rod sliding vertically with the limiting holes at different positions, so that the clamping and fixing component can adapt to the periphery of the pile basic body with different outer diameters, which improves the general use range of the clamping and fixing component. In the process of clamping and fixing, since the clamping grooves of the clamping and fixing component are all through grooves in the vertical direction and the horizontal cross-sections of the clamping grooves are all V-shaped, the clamping grooves can be stably pressed on the periphery of the pile basic body with different outer diameters, which further improves the general use range of the clamping and fixing component.

[0019] The beneficial effects are as follows: 1. After the protective top seat is placed on the top surface of the pile basic body, the protective top seat can be detachably fixed on the top surface of the pile basic body to protect the end surface of the pile head by pressing multiple clamping and fixing components on the circumference of the protective top seat against the periphery of the pile basic body, thereby avoiding the protective top seat from moving around on the top surface of the pile basic body and improving the stability of the protective top seat during the static load test.

[0020] 2. By driving the clamping plate close to the periphery of the pile basic body by the forward rotation of the stud, the clamping groove of the clamping plate can be pressed against the periphery of the pile basic body, thereby fixing the protective top seat on the top surface of the pile basic body. At the same time, by driving the clamping plate away from the pile basic body by the reverse rotation of the stud, the clamping groove of the clamping plate can be moved away from the periphery of the pile basic body, thereby releasing the fixing of the protective top seat on the top surface of the pile basic body and removing the protective top seat. The fixing and disassembly method of the protective top seat on the top surface of the pile basic body is simple and easy to operate, which is convenient for quickly fixing the protective top seat on the pile basic body for static load test and convenient for timely removing the protective top seat from the top surface of the pile basic body after the static load test is completed.

[0021] 3. The clamping and fixing assembly can be detachably fixed to the lower part of the wing seat corresponding to the periphery of the protective top seat by means of horizontal sliding cooperation between the sliding seat and the sliding groove and vertical sliding cooperation between the limiting rod and the limiting hole. The fixing combination method of the clamping and fixing assembly and the wing seat is simple and easy to operate, and then it is convenient to quickly combine the clamping and fixing assembly to the lower part of the corresponding wing seat for use;

[0022] 4. The sliding adjustment component has a plurality of limiting holes, and the initial distance between the clamping and fixing component and the periphery of the pile basic body can be adjusted by sliding the sliding seat horizontally along the sliding groove and by the limiting rods respectively sliding vertically with the limiting holes at different positions, so that the clamping and fixing component can be adapted to be clamped on the periphery of pile basic bodies with different outer diameters, thereby improving the general use range of the clamping and fixing component;

[0023] 5. The clamping grooves of the clamping and fixing components are all through grooves in the vertical direction, and the horizontal cross-sections of the clamping grooves are all V-shaped, so that the clamping grooves can be pressed against the periphery of pile basic bodies with different outer diameters, further improving the general use range of the clamping and fixing components;

[0024] 6. The outer ends of the slide grooves of the sliding adjustment components are open, and then after the limit rod is pulled down and out of the limit hole, the clamping and fixing components can be detached from the corresponding wing seats by sliding the slide seat horizontally along the slide groove and sliding out from the outer end. The method of separating the clamping and fixing components from the wing seats is simple and easy to operate, which makes it easy to remove the clamping and fixing components for regular maintenance. At the same time, it is easy to separate the clamping and fixing components from the wing seats and store and transport them separately, which is convenient for carrying and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is the overall axonometric diagram of the utility model. Figure 1 ;

[0027] Figure 2 This is the overall axonometric diagram of the utility model. Figure 2 ;

[0028] Figure 3 This utility model Figure 1 Cross-section diagram Figure 1 ;

[0029] Figure 4 This utility model Figure 3 A local enlarged view of point A;

[0030] Figure 5 This utility model Figure 1 Cross-section diagram Figure 2 ;

[0031] Figure 6 This utility model Figure 5 A partial enlarged view of point B;

[0032] Figure 7 This utility model Figure 1 Cross-section diagram Figure 3 ;

[0033] Figure 8 This utility model Figure 7 A partial enlarged view of point C;

[0034] Fig. 9 This utility model Figure 1 The front external view of

[0035] Fig.10 This utility model Figure 1 The left external view of

[0036] Fig.11 This utility model Figure 1 A top view of the exterior;

[0037] Fig.12 This utility model Figure 1 External view from above.

[0038] The following are the descriptions of the reference numerals:

[0039] 1. Pile basic body; 2. Protective top seat; 3. Wing seat; 301. Lifting handle; 4. Sliding adjustment assembly; 401. Limit rod; 402. Limit hole; 403. Slide groove; 404. Slide seat; 405. Mounting hole; 406. Spring; 407. Handle; 5. Clamping and fixing assembly; 501. Vertical plate; 502. Guide rod; 503. Guide hole; 504. Rocker arm; 505. Stud; 506. Locking nut; 507. Bearing seat; 508. Buffer lining; 509. Clamping groove; 5010. Clamping plate. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0041] See also Figure 1-Figure 12 As shown, the utility model provides a pile head protection device for static load test, including a pile basic body 1 and a protection top seat 2, the axis of the pile basic body 1 is vertically arranged and the top surface is coaxially placed with the protection top seat 2, the periphery of the protection top seat 2 is extended and fixed with a plurality of horizontal radial wing seats 3, and the bottom of the wing seat 3 is installed with a sliding adjustment component 4 that can slide and adjust the position and lock along the length direction, specifically, the sliding adjustment component 4 includes a slide groove 403 and a slide seat 404, and the bottom surface of the wing seat 3 is provided with a slide groove along the direction of its own length extension. 403, the bottom of the slide groove 403 is open, the top of the slide groove 403 is vertically provided with a plurality of limiting holes 402, and the plurality of limiting holes 402 of the same slide groove 403 are evenly arranged along the length direction of the corresponding wing seat 3, the slide groove 403 is horizontally slidably matched with a slide seat 404, one side of the bottom surface of the slide seat 404 is installed with a clamping fixing component 5, and the other side of the bottom surface of the slide seat 404 is vertically provided with a mounting hole 405, and the mounting hole 405 is a through hole and is vertically coaxial with a limiting hole 402 of the corresponding slide groove 403, and the mounting hole 405 is vertically provided with a fixing component 5. 05 are all vertically coaxially slidably matched with the limit rod 401, and the top of the limit rod 401 is vertically slidably matched with the corresponding limit hole 402, and the bottom end of the limit rod 401 extending out of the bottom surface of the slide seat 404 is coaxially fixed with a handle 407, and the part of the limit rod 401 located between the corresponding handle 407 and the bottom surface of the slide seat 404 is coaxially gap matched with a spring 406, and the two ends of the spring 406 are respectively fixedly connected with the corresponding handle 407 and the bottom surface of the slide seat 404, so that it is convenient to slide horizontally through the slide seat 404 and the slide groove 403 and The limiting rod 401 and the limiting hole 402 are vertically slidably matched to each other so that the clamping and fixing assembly 5 can be detachably fixed to the lower part of the wing seat 3 corresponding to the periphery of the protective top seat 2. At the same time, since there are multiple limiting holes 402, the initial distance between the clamping and fixing assembly 5 and the periphery of the pile basic body 1 can be adjusted by means of horizontal sliding of the sliding seat 404 along the sliding groove 403 and vertical sliding cooperation of the limiting rod 401 with the limiting holes 402 at different positions, so that the clamping and fixing assembly 5 can adapt to being clamped on the periphery of pile basic bodies 1 with different outer diameters.

[0042] See also Figure 1-Figure 8As shown, the bottom of the sliding adjustment component 4 is installed with a clamping and fixing component 5 that can be pressed against the periphery of the pile basic body 1, and the clamping and fixing components 5 are detachably fixed to the bottom of the corresponding wing seat 3 through the sliding adjustment component 4, so as to detachably fix the protective top seat 2 to the top surface of the pile basic body 1 by pressing multiple clamping and fixing components 5 against the periphery of the pile basic body 1. Specifically, the clamping and fixing components 5 include a vertical plate 501, a stud 505 and a clamping plate 5010. The vertical plates 501 are vertically fixed to the bottom surface of the corresponding sliding seat 404 and are arranged facing the periphery of the pile basic body 1. The middle part of the vertical plate 501 is vertically meshed with studs 505, and the studs 505 are arranged along the radial direction of the pile basic body 1. The parts of the studs 505 away from the periphery of the pile basic body 1 and extending out of the surface of the vertical plate 501 are coaxially meshed with locking nuts 506. The inner ends of the studs 505 close to the periphery of the pile basic body 1 are rotatably connected to a bearing seat 507, and the bearing seat The end faces 507 close to the pile basic body 1 are all fixed with clamping plates 5010, which are all arranged facing the periphery of the pile basic body 1 and are vertically provided with clamping grooves 509 for pressing against the periphery of the pile basic body 1. Such arrangement makes it easy to drive the clamping plates 5010 close to the periphery of the pile basic body 1 by the forward rotation of the stud 505, so that the clamping grooves 509 of the clamping plates 5010 can be pressed against the periphery of the pile basic body 1, thereby fixing the protective top seat 2 to the top end face of the pile basic body 1, and at the same time, drive the clamping plates 5010 away from the pile basic body 1 by the reverse rotation of the stud 505, so that the clamping grooves 509 of the clamping plates 5010 can leave the periphery of the pile basic body 1, thereby releasing the fixing of the protective top seat 2 on the top end face of the pile basic body 1 and detaching the protective top seat 2. In this way, the fast clamping and fixing of the clamping and fixing assembly 5 on the periphery of the pile basic body 1 is realized, and the fast loosening and detachment of the clamping and fixing assembly 5 after use is also realized.

[0043] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, as a preferred method in this case, the sliding adjustment component 4 is further optimized, and the sliding grooves 403 are all dovetail grooves or I-shaped grooves, so that the slide seat 404 can only slide laterally along the sliding grooves 403 and cannot escape from other directions, and the outer ends of the sliding grooves 403 are open. This arrangement makes it easy to pull the limiting rod 401 down and out of the limiting hole 402, and the clamping and fixing component 5 can be detached from the corresponding wing seat 3 by the slide seat 404 sliding horizontally along the sliding groove 403 and sliding out from the outer end.

[0044] See also Figure 1-Figure 8As shown, the clamping and fixing assembly 5 is further optimized. The locking nuts 506 are all hand-tightened knurled nuts, so that the locking nuts 506 can be tightened or loosened directly by hand. The inner ends of the studs 505 are coaxially fixed with the inner ring of the corresponding bearing seat 507, so that the studs 505 can realize the function of driving the clamping plate 5010 to move while rotating by rotating connection with the bearing seat 507. The outer ends of the studs 505 are coaxially fixed with rocker arms 504 for convenient and labor-saving rotation of the studs 505. Preferably, the rocker arms 504 are L-shaped. Such an arrangement facilitates the effort-saving rotation of the studs 505 by directly holding the rocker arms 504. The clamping grooves 509 are all through grooves in the vertical direction, and the cross-sectional shapes of the clamping grooves 509 in the horizontal direction are all V-shaped. Such an arrangement facilitates the clamping grooves 509 to be pressed against the periphery of the pile basic bodies 1 with different outer diameters by virtue of the V-shaped shape of the clamping grooves 509.

[0045] At the same time, it is more preferred that the inner wall of the clamping groove 509 is covered with a buffer lining 508 fixed with a buffer material, preferably a rubber plate, and the horizontal cross-sectional line shape of the buffer lining 508 is also V-shaped. Such a configuration makes it convenient to allow the buffer lining 508 to directly contact the periphery of the pile basic body 1 by covering the buffer lining 508 on the inner wall of the clamping groove 509, and then prevent the outer surface of the pile basic body 1 from being damaged during the clamping process by elastic deformation of the buffer lining 508. The vertical plate 501 is vertically provided with guide holes 503 at the upper and lower positions of the stud 505, and the guide holes 503 are coaxially slidably fitted with guide rods 502, and the inner ends of the guide rods 502 close to the corresponding splints 5010 are vertically fixed to the surface of the splint 5010. This arrangement makes it easy for the stud 505 to drive the splint 5010 to move, and the movement of the splint 5010 can be guided and corrected by the guide rods 502 coaxially sliding along the guide holes 503, so as to prevent the splint 5010 from rotating and misaligned with the rotation of the stud 505.

[0046] See also Figure 1-Figure 6 As shown, the protection top seat 2 and the wing seat 3 are optimized respectively. The protection top seat 2 is a circular plate, and multiple wing seats 3 are evenly distributed in the circumferential direction, so that the protection top seat 2 has a design style that conforms to use, and it is convenient to extend and fix multiple wing seats 3 evenly distributed along the circumferential direction on the periphery, and lifting handles 301 for easy lifting are installed on both sides of the end of the wing seat 3. Such a configuration makes it convenient for multiple people to hold the lifting handles 301 respectively to lift the protection top seat 2 and the wing seat 3 smoothly and place them on the top of the pile basic body 1 for use.

[0047] By adopting the above structure, when the pile head top surface on the top of the pile body 1 is protected during the static load test of the pile body 1, after the protective top seat 2 is placed on the top surface of the pile body 1, the protective top seat 2 can be detachably fixed to the top surface of the pile body 1 to protect the end surface of the pile head by pressing multiple clamping and fixing components 5 on the circumferential direction of the protective top seat 2 against the periphery of the pile body 1, thereby avoiding the protective top seat 2 from moving around on the top surface of the pile body 1, thereby improving the stability of the protective top seat 2 during the static load test. Specifically, during operation, firstly, at the beginning, the slide seat 404 and the corresponding slide groove 403 are both horizontally slidably matched, and at the same time, the limit rod 401 is vertically slidably matched with the corresponding limit hole 402, then at this time, the slide seat The horizontal sliding cooperation between 404 and the slide groove 403 and the vertical sliding cooperation between the limit rod 401 and the limit hole 402 can removably fix the clamping and fixing assembly 5 to the lower part of the wing seat 3 corresponding to the periphery of the protective top seat 2. The fixing combination method of the clamping and fixing assembly 5 and the wing seat 3 is simple and easy to operate, which makes it easy to quickly combine the clamping and fixing assembly 5 at the lower part of the corresponding wing seat 3 for use. When operating the clamping and fixing assembly 5, multiple people stand at the position of one of the clamping and fixing assemblies 5, and then screw the locking nut 506 close to the corresponding rocker arm 504, and then hold the corresponding rocker arm 504 at the same time to drive the stud 505 to rotate clockwise. In the process of rotating the stud 505, the splint 5010 is driven to approach the periphery of the pile basic body 1 by the rotating stud 505. The clamping groove 509 of the clamping plate 5010 is pressed against the periphery of the pile basic body 1, and then the protective top seat 2 is fixed to the top surface of the pile basic body 1. It should be noted that the multiple clamping plates 5010 should be kept synchronized as much as possible when approaching the periphery of the pile basic body 1. At the same time, the multiple clamping grooves 509 should be pressed against the outer surface of the pile basic body 1 through coordination of multiple people. Then, the studs 505 are kept from rotating and the locking nuts 506 are tightened on the corresponding surfaces of the vertical plates 501. In this way, the friction between the locking nuts 506 and the vertical plates 501 is used to prevent the studs 505 from rotating naturally. At the same time, the locking nuts 506 are used to tighten the threaded engagement degree of the studs 505 and the vertical plates 501 to further prevent the studs 505 from rotating naturally, so as to ensure that the protective top seat 2 is completed. The seat 2 is stably fixed and maintained on the top surface of the pile basic body 1. After the protective top seat 2 is fixed on the top surface of the pile basic body 1, the static load test of the pile basic body 1 can be started. During the static load test, since the pressure jack directly contacts the top surface of the protective top seat 2 but does not contact the top surface of the pile basic body 1 when applying pressure to the top pile head of the pile basic body 1, the possibility of the jack damaging the top surface of the pile basic body 1 can be reduced. After the test is completed, after loosening the locking nut 506, the clamping groove 509 of the clamping plate 5010 can be driven away from the pile basic body 1 by rotating the stud 505 counterclockwise, so that the clamping groove 509 of the clamping plate 5010 can leave the periphery of the pile basic body 1, thereby releasing the fixation of the protective top seat 2 on the top surface of the pile basic body 1 and detaching the protective top seat 2.The fixing and disassembly method of the protective top seat 2 on the top surface of the pile basic body 1 is simple and easy to operate, which is convenient for quickly fixing the protective top seat 2 on the pile basic body 1 for static load testing, and at the same time, it is convenient to promptly remove the protective top seat 2 from the top surface of the pile basic body 1 after the static load test is completed. When the protective top seat 2 is used and removed, since the outer ends of the slide grooves 403 of the sliding adjustment assembly 4 are open, after the limiting rod 401 is pulled down and out of the limiting hole 402, the clamping and fixing assembly 5 can be removed from the corresponding wing seat 3 by sliding the slide seat 404 horizontally along the slide groove 403 and sliding out from the outer end. The disassembly method of the clamping and fixing assembly 5 and the wing seat 3 is simple and easy to operate, which makes it convenient to remove the clamping and fixing assembly 5 for regular maintenance, and at the same time, it is convenient to separate the clamping and fixing assembly 5 from the wing seat 3 for storage and transportation, which is convenient for carrying and transportation, and the protective top seat 2 is placed Before being fixed on the top surface of the pile basic body 1 with different outer diameters, since there are multiple limiting holes 402 of the sliding adjustment component 4, the initial distance between the clamping and fixing component 5 and the periphery of the pile basic body 1 can be adjusted by means of the horizontal sliding of the sliding seat 404 along the sliding groove 403 and the vertical sliding cooperation of the limiting rod 401 with the limiting holes 402 at different positions, so that the clamping and fixing component 5 can be adapted to be clamped on the periphery of the pile basic body 1 with different outer diameters, thereby improving the general use range of the clamping and fixing component 5. In addition, during the clamping and fixing process, since the clamping grooves 509 of the clamping and fixing component 5 are all through grooves in the vertical direction and the horizontal cross-sections of the clamping grooves 509 are all V-shaped, the clamping grooves 509 can be stably pressed on the periphery of the pile basic body 1 with different outer diameters, thereby further improving the general use range of the clamping and fixing component 5.

[0048] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A pile head protection device for static load test, comprising a pile base body (1) and a protection top seat (2), characterized in that: The axis of the pile basic body (1) is arranged vertically and the top surface is coaxially provided with the protective top seat (2), a plurality of horizontal radial wing seats (3) are fixedly extended from the periphery of the protective top seat (2), and the bottom of each wing seat (3) is provided with a sliding adjustment component (4) capable of slidingly adjusting the position and locking it in the length direction; The bottom of each of the sliding adjustment components (4) is provided with a clamping and fixing component (5) capable of being pressed against the periphery of the pile basic body (1), and each of the clamping and fixing components (5) is detachably fixed to the bottom of the corresponding wing seat (3) through the sliding adjustment component (4), so that the protective top seat (2) can be detachably fixed to the top end surface of the pile basic body (1) by pressing a plurality of the clamping and fixing components (5) against the periphery of the pile basic body (1).

2. A pile head protection device for static load test according to claim 1, characterized in that: The sliding adjustment components (4) include a sliding groove (403) and a sliding seat (404). The bottom surface of the wing seat (3) is provided with the sliding groove (403) along the direction of its own length extension. The bottom of the sliding groove (403) is open. The top of the sliding groove (403) is vertically provided with a plurality of limiting holes (402). The plurality of limiting holes (402) of the same sliding groove (403) are evenly distributed along the length direction of the corresponding wing seat (3). The sliding groove (403) is horizontally slidably matched with the sliding seat (404).

3. A pile head protection device for static load test according to claim 2, characterized in that: The clamping and fixing assembly (5) is installed on one side of the bottom surface of the slide seat (404), and the other side of the bottom surface of the slide seat (404) is vertically provided with a mounting hole (405), and the mounting hole (405) is a through hole and vertically coaxially corresponds to a limiting hole (402) corresponding to the slide groove (403), and the mounting holes (405) are vertically coaxially slidably matched with the limiting rod (401), and the top end of the limiting rod (401) is aligned with the corresponding The limiting hole (402) is vertically slidably engaged, and the bottom end of the limiting rod (401) extending out of the bottom surface of the slide seat (404) is coaxially fixed with a handle (407), and the portion of the limiting rod (401) located between the corresponding handle (407) and the bottom surface of the slide seat (404) is coaxially gap-engaged with a spring (406), and the two ends of the spring (406) are respectively fixedly connected to the corresponding handle (407) and the bottom surface of the slide seat (404).

4. A pile head protection device for static load test according to claim 3, characterized in that: The slide grooves (403) are all dovetail grooves or I-shaped grooves, and the outer ends of the slide grooves (403) are open.

5. A pile head protection device for static load test according to claim 2, 3 or 4, characterized in that: The clamping and fixing components (5) each include a vertical plate (501), a stud (505) and a clamping plate (5010); the vertical plates (501) are vertically fixed on the bottom surface of the corresponding sliding seat (404) and are arranged facing the periphery of the pile basic body (1); the middle part of the vertical plates (501) is vertically meshed with the stud (505) and interspersed, and the stud (505) is arranged along the radial direction of the pile basic body (1); the stud (505) is away from the periphery of the pile basic body (1) and extends out of the vertical plate (501). The surface parts are coaxially meshed with locking nuts (506), the inner ends of the studs (505) close to the periphery of the pile basic body (1) are rotatably connected to a bearing seat (507), and the end faces of the bearing seats (507) close to the pile basic body (1) are fixed with the clamping plates (5010), the clamping plates (5010) are arranged facing the periphery of the pile basic body (1) and the end faces close to the pile basic body (1) are vertically provided with clamping grooves (509) for pressing against the periphery of the pile basic body (1).

6. A pile head protection device for static load test according to claim 5, characterized in that: The locking nuts (506) are all hand-tightened knurled nuts, the inner ends of the studs (505) are coaxially fixed to the inner ring of the corresponding bearing built into the bearing seat (507), and the outer ends of the studs (505) are coaxially fixed to the rocker arms (504) for convenient and labor-saving rotation of the studs (505).

7. A pile head protection device for static load test according to claim 6, characterized in that: The clamping grooves (509) are all through grooves in the vertical direction, and the cross-sectional shapes of the clamping grooves (509) in the horizontal direction are all V-shaped.

8. A pile head protection device for static load test according to claim 7, characterized in that: The inner wall of the clamping groove (509) is covered with a buffer lining (508) fixed with a buffer material, and the horizontal cross-sectional shape of the buffer lining (508) is also V-shaped.

9. A pile head protection device for static load test according to claim 8, characterized in that: The vertical plate (501) is vertically provided with guide holes (503) at positions above and below the stud (505), and the guide holes (503) are coaxially slidably matched with guide rods (502), and the inner ends of the guide rods (502) close to the corresponding clamping plates (5010) are vertically fixed to the surface of the clamping plates (5010).

10. A pile head protection device for static load test according to any one of claims 1-4 and 6-9, characterized in that: The protective top seats (2) are all circular plates, and a plurality of wing seats (3) are evenly distributed in the circumferential direction, and lifting handles (301) for facilitating lifting are installed on both sides of the ends of the wing seats (3).

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