Detection device for vertical compression resistance static load test of overwater foundation pile

Abstract

The utility model relates to the technical field of overwater foundation pile detection, and particularly discloses a detection device for a vertical compression resistance static load test of an overwater foundation pile, which comprises a test pile, a cross beam group, a buoyancy raft group, a jacking mechanism, two cross beam restraining mechanisms, two anchor piles and a plurality of buoyancy raft fixing devices, the two anchor piles are located on the two sides of the test pile and all arranged above the buoyancy raft set, the cross beam restraining mechanism is arranged on the tops of the anchor piles, the cross beam set is erected above the test pile and the two anchor piles, and the two ends of the cross beam set are arranged in the cross beam restraining mechanism in a penetrating mode. The buoyancy raft set is assembled into a whole through the multiple buoyancy raft fixing devices and floats on the water surface. According to the utility model, the land vertical compression resistance static load test device is improved, the possibility and reliability of the water vertical compression resistance static load test are realized, the overall structure is simple, and the implementation is easy.

Description

Technical Field

[0001] This utility model relates to the field of underwater pile testing technology, and in particular to a testing device for vertical compressive static load testing of underwater piles. Background Technology

[0002] The static load test for vertical compressive strength of foundation piles is a crucial step in the acceptance of pile foundation quality. Generally, the surcharge method and the anchor pile method are used. The anchor pile method is mainly suitable for reinforced concrete cast-in-place piles, while the surcharge method is primarily used for pipe piles. This technology is relatively mature. However, due to the special environment of underwater foundation piles, the testing methods used on land are difficult to apply on water, especially for underwater photovoltaic piles. Underwater photovoltaic piles mainly use pipe piles arranged in rows, and the anchor pile method used on land is not applicable to them. The special environment makes surcharge testing difficult to achieve, especially during the static load test of underwater foundation piles, where the reaction steel beam is difficult to hoist and transportation is relatively time-consuming and labor-intensive.

[0003] Chinese invention patent application number 202310168537.8 discloses a combined device and method for vertical static load testing of the anchor pile method on water. The combined device provided by the technical solution for vertical static load testing of the anchor pile method on water can combine the compressive and tensile testing devices into one. However, it can be seen from its specification and drawings that there is a risk of the crossbeam and the anchor pile detaching from the technical solution. In addition, the stability and safety of the buoyancy raft have not been solved.

[0004] Therefore, in order to improve the shortcomings of the prior art, it is necessary to propose an improvement to overcome the aforementioned defects. Utility Model Content

[0005] The purpose of this invention is to solve the problems in the prior art and provide a testing device for static load testing of vertical compressive strength of underwater foundation piles.

[0006] The technical solution of this utility model is as follows: A testing device for vertical compressive static load testing of water-based foundation piles includes a test pile, a crossbeam assembly, a buoyancy raft assembly, a jacking mechanism, two crossbeam constraint mechanisms, two anchor piles, and multiple buoyancy raft fixing devices. The two anchor piles are located on both sides of the test pile, and all three are set next to the buoyancy raft assembly, with their lower ends inserted into the water. The crossbeam constraint mechanism is set on the top of the anchor pile. The crossbeam assembly is erected above the test pile and the two anchor piles, with both ends passing through the crossbeam constraint mechanism. The jacking mechanism is set on the top of the test pile. The buoyancy raft assembly is assembled into a whole by multiple buoyancy raft fixing devices and floats on the water surface.

[0007] The lifting mechanism includes a hydraulic jack and a jack anti-detachment mechanism. The hydraulic jack is placed on the jack anti-detachment mechanism, and its upper part acts on the lower side of the crossbeam assembly. The jack anti-detachment mechanism is set at the top of the test pile.

[0008] For the transportation and installation of the crossbeam assembly, the crossbeam assembly includes a first crossbeam and two second crossbeams. The first crossbeam is located between the two second crossbeams. The first crossbeam and the second crossbeam are detachably connected. A loading plate is set in the middle of the bottom of the first crossbeam.

[0009] To avoid the risk of the crossbeam detaching from the anchor pile, the crossbeam restraint mechanism includes a restraint sleeve, a clamp, and two tie rods. The restraint sleeve is connected to the clamp via the two tie rods, and the clamp is detachably mounted on the upper end of the anchor pile.

[0010] To maintain balance and facilitate use, the jack anti-disengagement mechanism includes a jack sleeve and a fixing column. The fixing column is inserted into the test pile, and the hydraulic jack is fitted inside the jack sleeve. The jack sleeve is provided with a concave groove through which the hydraulic jack's connecting oil pipe can pass. The upper part of the hydraulic jack acts on the loading plate, and the lower part of the hydraulic jack is placed inside the jack anti-disengagement mechanism.

[0011] To accommodate various pile spacings, the buoyancy raft assembly includes Buoyancy Raft I, Buoyancy Raft II, and a guardrail. Buoyancy Raft I and Buoyancy Raft II are assembled from multiple buoyancy boxes based on the distance between the test pile and the anchor pile. The multiple buoyancy boxes are integrated into a constrained frame, and the guardrail surrounds the top of Buoyancy Raft I and Buoyancy Raft II.

[0012] To accommodate various pile diameters and pile positions, the buoyancy raft fixing device includes a fixing mechanism, two fixing blocks, and two connecting rods. The two fixing blocks are symmetrically arranged on both sides of the fixing mechanism and are connected to the fixing mechanism through two connecting rods respectively. The fixing blocks are detachably connected to the constraint frame.

[0013] To achieve quick and convenient connection of the buoyancy raft, the fixing mechanism includes two constraint components and two symmetrically arranged frame components. The constraint components include rotating plates, constraint clips, and pins. The frame components include a fixed frame, a transmission cylinder, and a limiting plate. The fixed frame has a U-shaped structure with an annular groove on its inner side. The limiting plate is inserted into the groove and has an opening larger than the outer radius of the test pile and anchor pile. The transmission cylinder is located on the outside of the fixed frame, and the connecting rod can be slidably inserted and removed into the transmission cylinder. The two rotating plates are symmetrically arranged at the opening end of one fixed frame, and the two constraint clips are symmetrically arranged at the opening end of the other fixed frame. The rotating plates and constraint clips are connected by pins.

[0014] To increase the structural strength of the crossbeam assembly, crossbeam one is a welded component, including an upper flange, a web, a lower flange, and four connecting plates. The upper flange, web, and lower flange are welded into a structure with an I-beam cross-section. The four connecting plates are respectively located at the end faces of the structure. One or two lifting rings are provided at the top of crossbeam one. Crossbeam two is a welded component, including an upper flange, a web, a lower flange, and four connecting plates. The upper flange, web, and lower flange are welded into a structure with an I-beam cross-section. The four connecting plates are respectively located at the end faces of the structure. One or two lifting rings are provided at the top of crossbeam two.

[0015] The present invention adopts the above structure and has the following advantages:

[0016] 1. The vertical compressive static load test device on land has been improved to realize the possibility and reliability of vertical compressive static load test on water. The overall structure is simple and easy to implement.

[0017] 2. A connection device for anchor piles and crossbeams - a crossbeam constraint mechanism - was designed to effectively avoid the risk of crossbeams and anchor piles separating. The risk of falling off can be avoided through simple matching.

[0018] 3. An assembly-type buoyancy raft unit was designed, which can be assembled according to the required buoyancy raft length based on the pile spacing, and the installation is simple and quick;

[0019] 4. A buoyancy raft fixing mechanism was designed, which can be adjusted according to the pile diameter and pile position to fix the buoyancy raft on the foundation pile, greatly increasing the stability and safety of the buoyancy raft and fundamentally improving the stability and reliability of the test. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the crossbeam of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the beam constraint mechanism of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the anti-detachment mechanism of the jack of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the buoyancy raft assembly and buoyancy raft fixing device of this utility model (with the guardrails removed).

[0025] Figure 6 A three-dimensional structural diagram of the buoyancy raft fixing device;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the fixed mechanism.

[0027] In the diagram, 101 is an anchor pile; 102 is a test pile; 210 is a crossbeam one; 211 is an upper flange; 212 is a web; 213 is a lower flange; 214 is a connecting plate one; 215 is a loading plate; 220 is a crossbeam two; 310 is a clamp; 311 is an ear plate two; 320 is a tie rod; 330 is a crossbeam restraint mechanism; 331 is a restraint sleeve; 332 is an ear plate one; 410 is a hydraulic jack; 420 is a jack anti-dislodgement mechanism; and 421 is a... 422. Jack sleeve; 423. Concave groove; 5. Fixed column; 5. Buoyancy raft assembly; 511. Buoyancy raft one; 512. Buoyancy raft two; 513. Buoyancy box; 514. Restraint frame; 521. Fixed block; 522. Connecting rod; 530. Fixing mechanism; 531. Fixed frame; 532. Transmission cylinder; 533. Limiting plate; 534. Slot; 535. Rotating plate; 536. Restraint clip; 537. Bolt; 6. Guardrail. Detailed Implementation

[0028] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0029] Example 1:

[0030] like Figure 1 As shown, a testing device for static load testing of vertical compressive strength of underwater foundation piles includes a test pile 102, a beam assembly, a buoyancy raft assembly 5, a lifting mechanism, two beam restraint mechanisms 330, two anchor piles 101, and multiple buoyancy raft fixing devices. The two anchor piles 101 are located on both sides of the test pile 102, and all three are installed next to the buoyancy raft assembly 5, with their lower ends inserted into the water.

[0031] The crossbeam assembly is erected above the test pile 102 and two anchor piles 101, with both ends passing through the crossbeam restraint mechanism 330. The crossbeam assembly includes a first crossbeam 210 and two second crossbeams 220, with the first crossbeam 210 located between the two second crossbeams 220. Figure 2As shown, the crossbeam 210 is a welded component, comprising an upper flange 211, a web 212, a lower flange 213, and four connecting plates 214. The upper flange 211, web 212, and lower flange 213 are welded into a structure with an I-beam cross-section. The four connecting plates 214 are welded to the end faces of the structure. A loading plate 215 is welded to the bottom center of the lower flange 213 of the crossbeam 210, and two lifting rings are welded to the top of the crossbeam 210. The second crossbeam 220 is a welded component, including an upper flange 211, a web 212, a lower flange 213, and four connecting plates 214. The upper flange 211, web 212, and lower flange 213 are welded into a structure with an I-beam cross-section. The four connecting plates 214 are welded to the end faces of the structure. A lifting ring is welded to the top of the second crossbeam 220. The first crossbeam 210 and the second crossbeam 220 are connected by the connecting plates 214 and multiple bolts.

[0032] The beam restraint mechanism 330 is installed on top of the anchor pile 101, such as... Figure 3 As shown, the beam restraint mechanism 330 includes a restraint sleeve 331, a clamp 310, and two tie rods 320. The restraint sleeve 331 is connected to the clamp 310 through the two tie rods 320. The restraint sleeve 331 is integrally provided with ear plate 332 on both sides. The clamp 310 is welded with ear plate 311 on both sides. Both ear plate 332 and ear plate 311 have openings, and the centers of the holes are on a straight line. The ear plate 332 and ear plate 311 are hinged together by the tie rods 320.

[0033] The jacking mechanism is installed at the top of the test pile 102. The jacking mechanism includes a hydraulic jack 410 and a jack anti-dislodgement mechanism 420. The upper part of the hydraulic jack 410 acts on the loading plate 215, such as... Figure 4 As shown, the jack anti-dislodgement mechanism 420 includes a jack sleeve 421 and a fixing column 423. The diameter of the fixing column 423 is slightly smaller than the inner diameter of the test pile 102. The fixing column 423 is inserted into the top of the test pile 102. The hydraulic jack 410 is fitted inside the jack sleeve 421. The jack sleeve 421 is machined with a concave groove 422 through which the oil pipe of the hydraulic jack 410 can pass.

[0034] like Figure 6 As shown, the buoyancy raft 5 is assembled into a whole by multiple buoyancy raft fixing devices and floats on the water surface. The buoyancy raft 5 includes buoyancy raft one 511, buoyancy raft two 512 and guardrail 6. Buoyancy raft one 511 and buoyancy raft two 512 are assembled by multiple buoyancy boxes 513 according to the distance between the test pile 102 and the anchor pile 101. Multiple buoyancy boxes 513 are integrated into a shape by a constraint frame 514. The guardrail 6 surrounds the top of buoyancy raft one 511 and buoyancy raft two 512.

[0035] like Figure 7As shown, the buoyancy raft fixing device includes a fixing mechanism 530, two fixing blocks 521, and two connecting rods 522. The two fixing blocks 521 are symmetrically installed on both sides of the fixing mechanism 530 and are connected to the fixing mechanism 530 through the two connecting rods 522 respectively. The fixing blocks 521 are detachably connected to the constraint frame 514, as shown. Figure 7 As shown, the fixing mechanism 530 includes two constraint components and two symmetrically arranged frame components. The constraint components include rotating plates 535, constraint clips 536, and pins 537. The frame components include a fixed frame 531, a transmission cylinder 532, and a limiting plate 533. The fixed frame 531 has a U-shaped structure and an annular groove 534 on its inner side. The limiting plate 533 is inserted into the groove 534. The limiting plate 533 has an opening slightly larger than the outer radius of the test pile 102 and the anchor pile 101. When installed, the opening is just locked around the test pile 102 and the anchor pile 101. The transmission cylinder 532 is installed on the outside of the fixed frame 531. The connecting rod 522 can be slidably inserted and removed into the transmission cylinder 532. The two rotating plates 535 are symmetrically installed at the opening end of one fixed frame 531, and the two constraint clips 536 are symmetrically installed at the opening end of the other fixed frame 531. The rotating plates 535 are inserted into the constraint clips 536, and the two are connected by pins 537.

[0036] Conduct vertical compressive static load tests:

[0037] First, preparation: The crossbeam assembly is formed by assembling crossbeam 1 (210) and crossbeam 2 (220) according to the distance between piles. Crossbeam 1 (210) is placed in the middle, and crossbeam 2 (220) is symmetrically arranged on both sides of crossbeam 1 (210). The crossbeam assembly is then formed. The connection points of the crossbeam assembly should not be located at the lifting position of the hydraulic jack 410. The number of crossbeam assemblies is selected according to the distance between the test pile 102 and the anchor pile 101. The fixing column 423 is inserted into the test pile 102, and the hydraulic jack 410 is placed on the jack sleeve 4. Inside 21, the hydraulic jack 410's oil pressure pipe is connected to the hydraulic jack 410 through the concave groove 422. The constraint sleeve 331 is hinged to the clamp 310 through the tie rod 320. Then, the constraint sleeve 331 is respectively fitted onto the end of the second crossbeam 220 away from the first crossbeam 210. The crossbeam assembly is lifted to the top of the test pile 102 using a gantry crane. When the loading plate 215 contacts the upper part of the hydraulic jack 410, the position of the crossbeam assembly is fixed. According to the position of the lower end of the tie rod 320, the clamp 310 is installed on the anchor pile 101.

[0038] The buoyancy raft 5 is assembled according to the distance and number between the test pile 102 and the anchor pile 101, such as... Figure 6As shown, the fixing mechanism 530 can move on the connecting rod 522 according to the position of the anchor pile 101 and the test pile 102, and the mechanism is not restricted by the position of the anchor pile 101 and the test pile 102, which greatly increases the flexibility of the mechanism. The opening of the limiting plate 533 can be replaced according to the outer diameter of the test pile 102 and the anchor pile 101. The fixing blocks 521 are symmetrically arranged, with one block every 3m on each buoyancy raft 5 and one block at each end. The position of the fixing blocks 521 should avoid the position of the test pile 102 and the anchor pile 101. The connecting rod 522 is fixed to the constraint frame 514 through the fixing blocks 521. The connecting rod 522 can be selected as one or more spliced ​​together according to the length of the buoyancy raft 5.

[0039] With the help of external force, the first buoyancy raft 511 and the second buoyancy raft 512 are symmetrically moved to both sides of the test pile 102 and the two anchor piles 101. The two buoyancy rafts are constrained to the test pile 102 and the anchor piles 101 by the fixing mechanism 530. At this time, the opening on the limiting plate 533 is just stuck on the periphery of the test pile 102 and the anchor piles 101, and then the subsequent operation is carried out.

[0040] Second, the test: According to the vertical compressive static load rating of test pile 102, different levels of load pressure were applied to the hydraulic jack 410, and vertical downward pressure was applied to test pile 102 through the hydraulic jack 410; the vertical displacement value of test pile 102 under compressive stress was recorded by dial gauge; under each level of pressure load, the settlement of the pile top in each hour should not exceed 0.1mm, and the stability standard should be reached after two consecutive occurrences, before the next level of load can be applied, and finally the ultimate load required by the design is applied.

[0041] It should be noted that the above-mentioned clamp 310, buoyancy box 513 and bolts are all applications of existing technology. In addition, the above-mentioned bolts are all used in conjunction with nuts, and both the bolts and nuts are high-strength bolts and high-strength nuts. The test process mentioned above is a conventional test setup in this field and will not be described in detail.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. A testing device for static load testing of vertical compressive strength of underwater foundation piles, characterized in that: The system includes a test pile (102), a beam assembly, a buoyancy raft assembly (5), a lifting mechanism, two beam restraint mechanisms (330), two anchor piles (101), and multiple buoyancy raft fixing devices. The two anchor piles (101) are located on both sides of the test pile (102), and all three are set next to the buoyancy raft assembly (5), with their lower ends inserted into the water. The beam restraint mechanism (330) is set on top of the anchor pile (101). The beam assembly is erected above the test pile (102) and the two anchor piles (101), with both ends passing through the beam restraint mechanism (330). The lifting mechanism is set at the top of the test pile (102). The buoyancy raft assembly (5) is assembled into a whole by multiple buoyancy raft fixing devices and floats on the water surface. The lifting mechanism includes a hydraulic jack (410) and a jack anti-detachment mechanism (420). The hydraulic jack (410) is placed on the jack anti-detachment mechanism, and its upper part acts on the lower side of the crossbeam group. The jack anti-detachment mechanism (420) is set at the top of the test pile (102).

2. The testing device for static load testing of vertical compressive strength of underwater foundation piles according to claim 1, characterized in that: The beam assembly includes a first beam (210) and two second beams (220). The first beam (210) is located between the two second beams (220). The first beam (210) and the second beams (220) are detachably connected. A loading plate (215) is provided at the bottom center of the first beam (210).

3. The testing device for static load testing of vertical compressive strength of underwater foundation piles according to claim 2, characterized in that: The beam restraint mechanism (330) includes a restraint sleeve (331), a clamp (310) and two tie rods (320). The restraint sleeve (331) is connected to the clamp (310) through the two tie rods (320). The clamp (310) is detachably mounted on the upper end of the anchor pile (101).

4. The testing device for static load testing of vertical compressive strength of underwater foundation piles according to claim 3, characterized in that: The jack anti-dislodgement mechanism (420) includes a jack sleeve (421) and a fixing column (423). The fixing column (423) is inserted into the test pile (102). The hydraulic jack (410) is fitted inside the jack sleeve (421). The jack sleeve (421) is provided with a concave groove (422) through which the oil pipe of the hydraulic jack (410) can pass. The upper part of the hydraulic jack (410) acts on the loading plate (215), and the lower part of the hydraulic jack (410) is placed inside the jack anti-dislodgement mechanism (420).

5. The testing device for static load testing of vertical compressive strength of underwater foundation piles according to claim 4, characterized in that: The buoyancy raft assembly (5) includes buoyancy raft one (511), buoyancy raft two (512) and guardrail (6). Buoyancy raft one (511) and buoyancy raft two (512) are assembled by multiple buoyancy boxes (513) according to the distance between the test pile (102) and the anchor pile (101). Multiple buoyancy boxes (513) are integrated into a shape by a constraint frame (514). The guardrail (6) surrounds the top of buoyancy raft one (511) and buoyancy raft two (512).

6. The testing device for static load testing of vertical compressive strength of underwater foundation piles according to claim 5, characterized in that: The buoyancy raft fixing device includes a fixing mechanism (530), two fixing blocks (521) and two connecting rods (522). The two fixing blocks (521) are symmetrically arranged on both sides of the fixing mechanism (530) and are connected to the fixing mechanism (530) by the two connecting rods (522) respectively. The fixing blocks (521) are detachably connected to the constraint frame (514).

7. The testing device for static load testing of vertical compressive strength of underwater foundation piles according to claim 6, characterized in that: The fixing mechanism (530) includes two constraint components and two symmetrically arranged frame components. The constraint components include a rotating plate (535), a constraint clip (536), and a pin (537). The frame components include a fixing frame (531), a transmission cylinder (532), and a limiting plate (533). The fixing frame (531) has a U-shaped structure and an annular groove (534) on its inner side. The limiting plate (533) is inserted into the groove (534). The limiting plate (533) has a larger opening than the test... The outer radius openings of the inspection pile (102) and anchor pile (101) are provided. The transmission cylinder (532) is located outside the fixed frame (531). The connecting rod (522) can be slidably inserted into the transmission cylinder (532). Two rotating plates (535) are symmetrically arranged at the opening end of one fixed frame (531). Two constraint clips (536) are symmetrically arranged at the opening end of the other fixed frame (531). The rotating plates (535) and constraint clips (536) are connected by the pins (537).

8. A testing device for static load testing of vertical compressive strength of underwater foundation piles according to any one of claims 2-4 and 6-7, characterized in that: The first crossbeam (210) is a welded component, including an upper flange (211), a web (212), a lower flange (213), and four connecting plates (214). The upper flange (211), web (212), and lower flange (213) are welded into a structure with an I-beam cross-section. The four connecting plates (214) are respectively located at the end face of the structure. The top of the first crossbeam (210) is provided with 1-2 lifting rings. The second crossbeam (220) is a welded component, including an upper flange (211), a web (212), a lower flange (213), and four connecting plates (214). The upper flange (211), web (212), and lower flange (213) are welded into a structure with an I-beam cross-section. The four connecting plates (214) are respectively located at the end face of the structure. The top of the second crossbeam (220) is provided with 1-2 lifting rings.

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