Device and method suitable for pile foundation bearing capacity detection

Abstract

The invention discloses a device and method suitable for pile foundation bearing capacity detection, and belongs to the technical field of pile foundation bearing capacity detection.The device comprises a soil body, a pile foundation body is arranged in the soil body, the pile foundation body comprises a reinforcement cage and connecting ribs distributed on the reinforcement cage at equal intervals in a surrounding mode, and supporting assemblies are arranged on the periphery of the pile foundation body; the upper end of the pile foundation body is provided with a bearing capacity testing assembly, the bearing capacity testing assembly comprises a bearing structure and a bearing top plate at the upper end of the bearing structure, and the bearing top plate is provided with a jack. The pile foundation bearing capacity test method has the advantages that the pile foundation bearing capacity test device can be constructed at the pile top after being maintained to reach the design strength, is convenient to disassemble and can be repeatedly used, the problem of steel bar damage when concrete is disassembled in a traditional mode is solved, the flexibility of the pile foundation bearing capacity test is improved, the time is shortened, and the test cost is reduced.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of pile foundation bearing capacity detection, and specifically relates to a device and method suitable for pile foundation bearing capacity detection. Background Art

[0002] The full name of pile foundation is pile foundation, which is a commonly used foundation form in construction projects. It is mainly composed of piles and pile caps. Piles are load-bearing structures buried vertically or inclined in the ground, and pile caps are components that connect all pile tops and evenly distribute the load of the superstructure. The main functions of pile foundations include bearing, reducing settlement, shockproof effect, convenient construction and economy. There are many types of pile foundations. According to the construction method, they can be divided into precast piles and cast-in-place piles. According to the force characteristics, they can be divided into end-bearing piles and friction piles. In actual engineering applications, the appropriate type of pile foundation will be selected according to specific geological conditions, engineering requirements and economic benefits.

[0003] Pile foundation bearing capacity testing is an important measure to ensure the quality of pile foundation engineering and building safety. Pile foundation bearing capacity testing usually adopts static load test, loads weight blocks on the top of the pile to test the bearing capacity of the pile foundation. When conducting static load test, it is necessary to concentrate the gravity of the weight blocks on the pile and ensure the stability of the test structure. The commonly used method is to chisel off the over-cast concrete on the top of the pile, support the formwork or install the casing and pour concrete, ensure that the exposed steel bars are completely concealed and meet the requirements of the protective layer thickness, after curing to the design strength, install jacks and pads, install longitudinal supports and pads, install transverse supports and pads, and load weight blocks on the transverse supports to test the bearing capacity of the pile foundation; After the test is completed, all supports, pads, jacks and pads are removed, and then the pile top elevation is chiseled off to the bottom elevation of the upper structure of the pile top before the next construction can be carried out. When removing the concrete, the protection of the steel bars must also be taken into account. The current method is prone to cause steel bar loss, and the maintenance and chiseling of concrete will consume a lot of time, making the pile foundation testing costly. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technology. Specifically, the present invention mainly provides a device and method suitable for pile foundation bearing capacity detection, so as to solve the technical problems raised in the above background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A device suitable for pile foundation bearing capacity detection includes soil, wherein a pile basic body is arranged in the soil, the pile basic body includes a steel cage and connecting bars circumferentially distributed at equal intervals on the steel cage, a support assembly is arranged around the pile basic body, the support assembly is located on the soil, a bearing capacity test assembly is arranged at the upper end of the pile basic body, the bearing capacity test assembly includes a load-bearing structure and a load-bearing top plate at the upper end of the load-bearing structure, a jack is arranged on the load-bearing top plate, and the base of the jack is located in the middle position of the upper surface of the load-bearing top plate.

[0006] Preferably, the support assembly includes two first concrete blocks distributed in parallel, a first steel support frame is commonly provided on the two first concrete blocks, two second steel support frames are provided on the first steel support frames, and a plurality of linearly arranged static load weights are commonly provided on the two second steel support frames.

[0007] Preferably, second concrete blocks are provided at both ends of the two second steel support frames, and the two second concrete blocks are distributed in parallel.

[0008] Preferably, a plurality of cushion blocks are arranged between the output end of the jack and the lower side of the first steel support frame.

[0009] Preferably, a plurality of sensors are arranged around the cushion block, the sensors are arranged on the lower surface of the first steel support frame, and the sensors and the first steel support frame are detachably connected.

[0010] Preferably, a hydraulic control connection hole is provided on one side of the outer wall of the jack.

[0011] Preferably, a docking hole is provided at the upper end of the pile basic body, the docking hole and the lower end of the load-bearing structure fit together, and the upper end of the load-bearing structure and the load-bearing top plate are welded.

[0012] A method applicable to a pile foundation bearing capacity detection device, the method specifically comprising the following steps: Step 1: Chisel out the over-cast concrete on the upper part of the pile basic body, and drill a docking hole at the top center of the pile basic body. The diameter of the docking hole is consistent with the diameter of the bottom of the load-bearing structure. Then clean the concrete on the surface of the connecting bar and bend the connecting bar at a certain angle. Step 2: Insert the load-bearing structure into the docking hole at the top of the pile basic body, then install the center position of the load-bearing top plate 6 to the top of the load-bearing structure 5, while ensuring that the surface of the load-bearing top plate is flat, and fix the load-bearing top plate 6 and the load-bearing structure by spot welding, then install the jack to the upper part of the load-bearing top plate, and ensure that the jack is in the initial state, and place sensors around the jack; Step 3: Place two first concrete blocks in parallel on both sides of the bearing capacity test assembly, and then erect the first steel support frame on the first concrete blocks. At the same time, place a pad at the output end of the jack, and adjust the height and number of the pad so that the pad fits tightly with the lower side of the first steel support frame, and ensure that the first steel support frame is in a horizontal state; Step 4: Place two second concrete blocks in parallel on the other two sides of the bearing capacity test assembly, and then erect a second steel support frame on the two second concrete blocks and the first steel support frame, while ensuring that the surface of the second steel support frame is horizontal, and then hoist the static load weights onto the second steel support frame in turn, and ensure that the static load weights are placed in an orderly and reasonable manner, and then the pile base body can be tested for bearing capacity.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes that the pile foundation bearing capacity test can be completed in a short time through the arrangement of the pile basic body, docking holes, steel cage, connecting bars, load-bearing structure, load-bearing top plate, sensors, jacks and pads. There is no need to over-pour concrete on the top of the pile basic body and wait for the concrete to solidify and cure to the designed strength before construction as in the prior art. The present application can directly build the bearing capacity test equipment on the pile top, reducing the steps of pouring concrete on the top of the pile foundation, and also saving the concrete pouring time, curing time, chiseling time and cleaning time, thereby improving the efficiency of the pile foundation bearing capacity test. Moreover, since there is no need to cast concrete, the step of removing concrete at a later stage is omitted, the damage and loss to the connecting bars is avoided, the construction cost is reduced, and the top elevation of the upper structure can be chiseled out at one time without the need for secondary operation and secondary measurement.

[0014] The present invention realizes that a structure for supporting a static load ballast block can be directly built around the pile basic body by setting the first concrete block, the first steel support frame, the second steel support frame and the second concrete block, and there is no need for concrete pouring and positioning during the process, which is convenient for subsequent disassembly and can be reused. Unlike traditional methods, many structures cannot be used a second time, have a high loss rate, and save costs. In addition, with the cooperation of the docking holes, the load-bearing structure and the load-bearing top plate, it is convenient to adjust and it is easy to ensure the flatness of the jack installation plane, avoiding the grinding of the jack installation plane. Since the first concrete block, the second concrete block and the static load ballast block are all made of concrete at the construction site, local materials are used, which further reduces material costs and transportation costs.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is a schematic diagram of the overall structure decomposition of the present invention; Figure 3 It is a schematic diagram of the decomposition of the bearing capacity testing assembly of the present invention.

[0017] In the figure: 1. Soil; 11. Pile basic body; 111. Docking hole; 12. Steel cage; 13. Connecting bars; 2. Bearing capacity test assembly; 21. Load-bearing structure; 22. Load-bearing top plate; 23. Jack; 231. Hydraulic control connecting hole; 24. Pad; 3. Support assembly; 31. First concrete block; 32. First steel support frame; 33. Second steel support frame; 34. Second concrete block; 35. Static load weight block; 4. Sensor. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] Example 1, please refer to the attached Figure 1-3 As shown, a device suitable for pile foundation bearing capacity detection includes a soil body 1, a pile basic body 11 is arranged in the soil body 1, the pile basic body 11 includes a steel cage 12 and connecting bars 13 distributed around the steel cage 12 at equal intervals, a support assembly 3 is arranged around the pile basic body 11, the support assembly 3 is located on the soil body 1, a bearing capacity test assembly 2 is arranged at the upper end of the pile basic body 11, the bearing capacity test assembly 2 includes a load-bearing structure 21 and a load-bearing top plate 22 at the upper end of the load-bearing structure 21, a jack 23 is arranged on the load-bearing top plate 22, and the base of the jack 23 is located in the middle position of the upper surface of the load-bearing top plate 22.

[0022] Through the above structure, it is possible to complete the pile foundation bearing capacity test in a short time without over-pouring concrete on the pile top and waiting for the concrete to solidify and cure to the design strength. It is only necessary to build the bearing capacity test equipment on the pile top, which can be easily disassembled and reused afterwards. Unlike the traditional method, there will be no problem of damaging the steel bars when removing the concrete. This improves the flexibility of the pile foundation bearing capacity test, shortens the time of the pile foundation bearing capacity test, and reduces the cost of the pile foundation bearing capacity test.

[0023] The specific operation is as follows: first, remove the over-cast concrete on the upper part of the pile basic body 11, and drill a docking hole 111 at the center position of the top of the pile basic body 11. The diameter of the docking hole 111 is consistent with the diameter of the bottom of the load-bearing structure 21. Then, clean the concrete on the surface of the connecting bar 13, and bend the connecting bar 13 at a certain angle; insert the load-bearing structure 21 into the docking hole 111 on the top of the pile basic body 11, and then install the center position of the load-bearing top plate 22 to the top of the load-bearing structure 21, while ensuring that the surface of the load-bearing top plate 22 is flat, and the load-bearing top plate 22 and the load-bearing structure 21 are spot-welded and fixed, and then the jack 23 is installed to the upper part of the load-bearing top plate 22, and ensure that the jack 23 is in the initial state, and the sensor 4 is placed around the jack 23; in the load-bearing capacity measurement Two first concrete blocks 31 are placed in parallel on both sides of the test assembly 2, and then the first steel support frame 32 is erected on the first concrete block 31, and at the same time, a cushion block 24 is placed at the output end of the jack 23, and the height and number of the cushion block 24 are adjusted so that the cushion block 24 fits tightly with the lower side of the first steel support frame 32, and ensure that the first steel support frame 32 is in a horizontal state, and two second concrete blocks 34 are placed in parallel on the other two sides of the bearing capacity test assembly 2, and then a second steel support frame 33 is erected on the two second concrete blocks 34 and the first steel support frame 32, and at the same time ensure that the surface of the second steel support frame 33 is horizontal, and then the static load weight block 35 is hoisted onto the second steel support frame 33 in turn, and ensure that the static load weight block 35 is placed in an orderly and reasonable manner, and then the pile basic body 11 can carry out bearing capacity testing.

[0024] Example 2, please refer to the attached Figure 1 and 2As shown, the support assembly 3 includes two first concrete blocks 31 distributed in parallel, a first steel support frame 32 is commonly provided on the two first concrete blocks 31, two second steel support frames 33 are provided on the first steel support frame 32, second concrete blocks 34 are provided at both ends of the two second steel support frames 33, and the two second concrete blocks 34 are distributed in parallel, and a plurality of linearly arranged static load weights 35 are commonly provided on the two second steel support frames 33. Through the mutual cooperation among the first concrete block 31, the second concrete block 34, the first steel support frame 32 and the second steel support frame 33, the auxiliary jack 23 provides a stable support for the static load weight 35. A plurality of sensors 4 are provided around the cushion block 24. The sensor 4 is provided on the lower surface of the first steel support frame 32, and the sensor 4 and the first steel support frame 32 are detachably connected. Through the sensor 4, the bearing capacity of the pile basic body 11 is detected.

[0025] Example 3, please refer to the attached Figure 1 and 3 As shown, a plurality of pads 24 are arranged between the output end of the jack 23 and the lower side of the first steel support frame 32, and the pads 24 are used to fill the gap between the jack 23 and the first steel support frame 32. A hydraulic control connecting hole 231 is arranged on one side of the outer wall of the jack 23 for docking with a pipeline for transmitting oil, and a docking hole 111 is arranged on the upper end of the pile basic body 11, and the docking hole 111 and the lower end of the load-bearing structure 21 fit each other, and the upper end of the load-bearing structure 21 and the load-bearing top plate 22 are welded, and a stable connection between the load-bearing structure 21 and the pile basic body 11 is achieved through the docking hole 111.

[0026] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A device suitable for detecting the bearing capacity of a pile foundation, comprising a soil body (1), wherein a pile basic body (11) is arranged in the soil body (1), wherein the pile basic body (11) comprises a steel cage (12) and connecting bars (13) which are evenly spaced and distributed around the steel cage (12), wherein the device is characterized in that A support assembly (3) is arranged around the pile basic body (11), the support assembly (3) is located on the soil body (1), a bearing capacity test assembly (2) is arranged at the upper end of the pile basic body (11), the bearing capacity test assembly (2) comprises a bearing structure (21) and a bearing top plate (22) at the upper end of the bearing structure (21), a jack (23) is arranged on the bearing top plate (22), and the base of the jack (23) is located in the middle position of the upper surface of the bearing top plate (22).

2. A device suitable for pile foundation bearing capacity detection according to claim 1, characterized in that: The support assembly (3) comprises two first concrete blocks (31) arranged in parallel, a first steel support frame (32) being provided on the two first concrete blocks (31), two second steel support frames (33) being provided on the first steel support frames (32), and a plurality of linearly arranged static load weights (35) being provided on the two second steel support frames (33).

3. A device suitable for pile foundation bearing capacity detection according to claim 2, characterized in that: Second concrete blocks (34) are provided at both ends of the two second steel support frames (33), and the two second concrete blocks (34) are arranged in parallel.

4. A device suitable for pile foundation bearing capacity detection according to claim 1, characterized in that: A plurality of cushion blocks (24) are arranged between the output end of the jack (23) and the lower side of the first steel support frame (32).

5. A device suitable for pile foundation bearing capacity detection according to claim 4, characterized in that: A plurality of sensors (4) are arranged around the cushion block (24); the sensors (4) are arranged on the lower surface of the first steel support frame (32), and the sensors (4) and the first steel support frame (32) are detachably connected.

6. A device suitable for pile foundation bearing capacity detection according to claim 4, characterized in that: A hydraulic control connection hole (231) is provided on one side of the outer wall of the jack (23).

7. A device suitable for pile foundation bearing capacity detection according to claim 1, characterized in that: The upper end of the pile basic body (11) is provided with a docking hole (111), the docking hole (111) and the lower end of the load-bearing structure (21) fit together, and the upper end of the load-bearing structure (21) and the load-bearing top plate (22) are welded.

8. A method applicable to a pile foundation bearing capacity detection device, characterized in that: Using a device suitable for pile foundation bearing capacity detection according to any one of claims 1 to 7, the method specifically comprises the following steps: Step 1: Chisel away the over-cast concrete on the upper part of the pile basic body (11), and chisel out a docking hole (111) at the center of the top of the pile basic body (11). The diameter of the docking hole (111) is consistent with the diameter of the bottom of the load-bearing structure (21). Then, clean the concrete on the surface of the connecting bar (13), and bend the connecting bar (13) at a certain angle. Step 2: Insert the load-bearing structure (21) into the docking hole (111) at the top of the pile base body (11), then install the center position of the load-bearing top plate (22) to the top of the load-bearing structure (21), while ensuring that the surface of the load-bearing top plate (22) is flat, and spot weld the load-bearing top plate (22) and the load-bearing structure (21), then install the jack (23) to the upper part of the load-bearing top plate (22), and ensure that the jack (23) is in the initial state, and place the sensor (4) around the jack (23); Step 3: Place two first concrete blocks (31) in parallel on both sides of the bearing capacity test assembly (2), then erect the first steel support frame (32) on the first concrete block (31), and at the same time place a cushion block (24) at the output end of the jack (23), and adjust the height and number of the cushion blocks (24) so ​​that the cushion blocks (24) fit tightly against the lower side of the first steel support frame (32), and ensure that the first steel support frame (32) is in a horizontal state; Step 4: Place two second concrete blocks (34) in parallel on the other two sides of the bearing capacity test assembly (2), and then erect a second steel support frame (33) on the two second concrete blocks (34) and the first steel support frame (32), while ensuring that the surface of the second steel support frame (33) is horizontal, and then hoist the static load weights (35) onto the second steel support frame (33) in turn, and ensure that the static load weights (35) are placed in an orderly and reasonable manner, and then the pile base body (11) can be tested for bearing capacity.

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