Pile foundation bearing capacity detection device

By using a combination structure of steel pad plate, hydraulic jack, main beam, tension composite anchor rod, secondary beam and distribution beam in the pile foundation bearing capacity detection device, the problems of excessive height of traditional devices and loose soil are solved, and accurate and convenient inspection in complex sites are achieved.

CN223202395UActive Publication Date: 2025-08-08ARCHITECTURAL DESIGN INST FUKIEN PROV
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Patent Information

Application Number
CN202421738667.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-22
Publication Date
2025-08-08
Estimated Expiration
2034-07-22

AI Technical Summary

Technical Problem

In pile foundation bearing capacity detection, traditional devices are too high and difficult to install on complex sites, and the anchor rods are affected by loose soil, resulting in inaccurate detection and difficult installation.

Method used

The combined structure of steel pad plates, hydraulic jacks, main beams, tension composite anchors, secondary beams and distribution beams is adopted. The anchor rods are far away from the pile foundation and are arranged in a circular manner to avoid the influence of loose soil. There is no need to stack stones. A combination structure of steel beams and anchor rods is used to facilitate installation and dismantling.

Benefits of technology

Accurate pile foundation bearing capacity detection in complex sites, reduce device height, reduce space occupation, improve detection accuracy and installation convenience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a pile foundation bearing capacity detection device which comprises a steel base plate, an oil jack, a main beam, tension-compression composite anchor rods, a secondary beam and a distribution beam, the steel base plate, the oil jack, the steel base plate and the main beam are sequentially placed above a pile foundation from bottom to top, the two ends of the main beam are fixed on the ground through the tension-compression composite anchor rods, and the secondary beam is fixed on the distribution beam. The number of the secondary beams is four, the included angles between the secondary beams and the main beam are acute angles, two paired secondary beams are symmetrically distributed on the front side and the rear side of the left end of the main beam, the other two paired secondary beams are symmetrically distributed on the front side and the rear side of the right end of the main beam, the distribution beam is placed on the main beam, and the distribution beam is arranged on the main beam. The secondary beams in pairs are placed at the two ends of one distribution beam respectively, and the two ends of each secondary beam are fixed to the ground through the tension-compression composite anchor rods. The anchor rod is far away from the pile foundation, stress of the anchor rod is not affected by loosening of surrounding soil in the pile foundation detection process, and the detection device is convenient to mount and dismount.
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Description

Technical Field

[0001] The utility model relates to the technical field of building pile foundation detection, in particular to a pile foundation bearing capacity detection device. Background Art

[0002] In the design of general building foundation, pile foundation is often used. When the pile foundation is completed, it is usually necessary to test the bearing capacity of the pile foundation. In the traditional bearing capacity test process, it is necessary to use stone piles to balance the reaction force of the hydraulic jack. Figure 1 As shown, a steel pad 2, hydraulic jack 3, steel pad 2, and main beam 4 are sequentially installed above pile foundation 1. Stone blocks 5 are stacked on top of main beam 4, with the stone blocks 5 stacked at a relatively high height. Testing pile foundation bearing capacity is difficult when the site conditions are complex, the clearance above the site is limited, or large machinery cannot be brought in to lift the stone blocks. Therefore, optimizing the testing device to address the issue of excessive height while ensuring detection is a critical task at this stage. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a pile foundation bearing capacity detection device, in which the anchor rod is far away from the pile foundation, the anchor rod force is not affected by the loosening of the surrounding soil during the pile foundation detection process, and the detection device occupies less space and is easy to install and dismantle.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A pile foundation bearing capacity detection device includes a steel pad, a hydraulic jack, a main beam, a tension-compression composite anchor rod, a secondary beam and a distribution beam. The steel pad, the hydraulic jack, the steel pad and the main beam are placed in sequence from bottom to top on the pile foundation. The two ends of the main beam are fixed to the ground by the tension-compression composite anchor rod. There are four secondary beams, and the angles between them and the main beam are all acute angles. Two pairs of secondary beams are symmetrically distributed on the front and rear sides of the left end of the main beam, and the other two pairs of secondary beams are symmetrically distributed on the front and rear sides of the right end of the main beam. The distribution beam is placed on the main beam, and the pairs of secondary beams are respectively placed on the two ends of one of the distribution beams, and the two ends of the secondary beams are fixed to the ground by the tension-compression composite anchor rod.

[0006] Furthermore, all of the tension-compression composite anchor rods are distributed on the same circle.

[0007] Furthermore, the angle between the main beam and the secondary beam is 30° to 45°.

[0008] Furthermore, the two distribution beams are symmetrically placed 2 to 2.5 meters away from the midpoint of the main beam.

[0009] Furthermore, the tension-compression composite anchor rod includes a steel bar body and a steel sleeve. The lower end of the steel bar body is fixed on the ground, the upper end of the steel bar body passes through the end of the main beam, and then passes through a steel pad and is locked and fixed with the steel sleeve. The upper end of the steel bar body passes through the end of the secondary beam, and then passes through a steel pad and is locked and fixed with the steel sleeve.

[0010] Furthermore, the tension-compression composite anchor rod also includes a PVC sleeve, a pressure-bearing body and a steel sleeve. The PVC sleeve is sleeved on the part of the steel bar body below the ground, and the pressure-bearing body is fixed to the bottom of the PVC sleeve.

[0011] Furthermore, the length of the steel bar body of the tension-compression composite anchor rod exposed above the ground is 1.5m to 2m.

[0012] Furthermore, the main beams are two cross beams symmetrically arranged front to back.

[0013] The beneficial effect of this utility model is that all tension-compression composite anchor rods (hereinafter referred to as anchor rods) are located farther away from the pile foundation, thereby ensuring that loose soil around the pile foundation has no effect on the anchor rods during pile foundation bearing capacity testing. This not only ensures the structural strength of the anchor rod installation, but also makes pile foundation bearing capacity testing more accurate. In addition, the installation space required for the testing device is reduced by eliminating the need for stacking, and the combined anchor rod and steel structure makes the testing device easy to install and remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a pile foundation bearing capacity detection device in the background technology;

[0015] Figure 2 This is a front view of a pile foundation bearing capacity detection device according to an embodiment of the present utility model;

[0016] Figure 3 A top view of a pile foundation bearing capacity detection device according to an embodiment of the present utility model;

[0017] Figure 4 This is a left side view of the pile foundation bearing capacity detection device according to an embodiment of the present utility model;

[0018] Figure 5 A top view of a steel base plate of a pile foundation bearing capacity detection device according to an embodiment of the present invention;

[0019] Figure 6 This is a partial enlarged view of the tension-compression composite anchor rod in the soil according to an embodiment of the utility model;

[0020] Figure 7 This is a partial enlarged view of the locking part at the top of the tension-compression composite anchor rod according to an embodiment of the present utility model.

[0021] Description of labels:

[0022] 1. Pile foundation; 2. Steel pad; 3. Hydraulic jack; 4. Main beam; 5. Stone;

[0023] 100. Pile foundation; 101. Hydraulic jack; 102. Steel pad;

[0024] 201, main beam; 202, distribution beam; 203, secondary beam;

[0025] 300, tension-compression composite anchor; 301, steel bar body; 302, drilling hole; 303, PVC casing; 304, steel sleeve; 305, pressure-bearing body;

[0026] 500. The scope of soil layers affected by pile foundation test. DETAILED DESCRIPTION

[0027] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0028] Please refer to Figures 2 to 7 , the embodiments provided by the present utility model are:

[0029] A pile foundation bearing capacity detection device includes a steel plate 102, a hydraulic jack 101, a main beam 201, a tension-compression composite anchor rod 300, a secondary beam 203 and a distribution beam 202. The steel plate 102, the hydraulic jack 101, the steel plate 102, the main beam 201 are placed in order from bottom to top on the pile foundation 100. The two ends of the main beam 201 are fixed to the ground by the tension-compression composite anchor rod 300. There are four secondary beams 203, and they are connected to the main beam 201. The included angles are all acute angles, wherein two pairs of the secondary beams 203 are symmetrically distributed on the front and rear sides of the left end of the main beam 201, and the other two pairs of the secondary beams 203 are symmetrically distributed on the front and rear sides of the right end of the main beam 201. The distribution beam 202 is placed on the main beam 201, and the paired secondary beams 203 are respectively placed at the two ends of one of the distribution beams 202, and the two ends of the secondary beams 203 are fixed to the ground by the tension-compression composite anchor rods 300.

[0030] All tension-compression composite anchor rods 300 (hereinafter referred to as anchor rods) are positioned relatively far from the pile foundation 100. This prevents loose soil around the pile foundation from affecting the anchor rods during the pile foundation bearing capacity test. This ensures the structural strength of the anchor rods while also making the pile foundation bearing capacity test more accurate. Furthermore, the need for stacking to apply pressure reduces the space required for the test device installation. The combined anchor rod and steel structure also facilitates installation and removal of the test device.

[0031] The force process during the pile foundation bearing capacity test is as follows: after the hydraulic jack applies the force, the pile foundation is applied with a downward force, and the main beam, distribution beam and secondary beam are all applied with an upward force. The upward force of the main beam and secondary beam is ultimately borne by the anchor rod.

[0032] Further, such as Figure 3 As shown, all of the tension-compression composite anchor rods 300 are distributed on the same circle, so that all anchor rods of the device are arranged in a circular manner, and all anchor rods are arranged outside the pile foundation test influence soil layer range 500 of the pile foundation 100 being tested, so that during the testing process, the anchor rods are not affected by the loosening of the surrounding soil during the pile foundation testing process, and the pile foundation bearing capacity test is more accurate.

[0033] Preferably, the angle between the main beam 201 and the secondary beam 203 is 30° to 45°.

[0034] Preferably, the two distribution beams 202 are symmetrically placed 2 to 2.5 meters away from the midpoint of the main beam 201.

[0035] Furthermore, for the locking structure between the upper end of the anchor rod and various steel beams, such as Figure 7 As shown, the tension-compression composite anchor rod includes a steel bar body 301 and a steel sleeve 304. The lower end of the steel bar body 301 is fixed on the ground, and the upper end of the steel bar body 301 passes through the end of the main beam 201, and then passes through a steel pad 102 and is locked and fixed with the steel sleeve 304 to achieve locking and fixation between the anchor rod and the main beam. The upper end of the steel bar body 301 passes through the end of the secondary beam 203, and then passes through a steel pad 102 and is locked and fixed with the steel sleeve 304 to achieve locking and fixation between the anchor rod and the secondary beam.

[0036] Further, such as Figure 6 As shown, the tension-compression composite anchor rod further includes a PVC sleeve 303, a pressure-bearing body 305 and a steel sleeve 304. The steel bar body 301 is sleeved with the PVC sleeve 303 on the part below the ground, and the pressure-bearing body 305 is fixed to the bottom of the PVC sleeve 303.

[0037] The specific process of installing the tension-compression composite anchor rod 300 in the stratum is as follows: drilling a hole in the stratum to form a borehole 302; installing the pressure-bearing body 305 on the lower end of the steel body 301, and putting the PVC sleeve 303 on the steel body 301, at this time the lower surface of the PVC sleeve 303 is in contact with the upper surface of the pressure-bearing body 305; pouring concrete on the stratum surface so that the upper surface of the PVC sleeve 303 is in full contact with the concrete, at this time the lower part of the tension-compression composite anchor rod 300 is completely fixed to the stratum, and at this time the tension-compression composite anchor rod 300 has good tensile and compressive resistance.

[0038] Preferably, the length of the steel bar body 301 of the tension-compression composite anchor exposed above the ground is 1.5m to 2m.

[0039] Preferably, the main beam 201 is two cross beams symmetrically arranged front to back, so that the main beam has better bearing capacity.

[0040] Specifically, such as Figure 7 As shown, the steel plate 102 has a hole in the middle for easy installation.

[0041] The detection method corresponding to the above pile foundation bearing capacity detection device is:

[0042] Step 1: Before testing the bearing capacity of the pile foundation 100, the tension-compression composite anchor rod 300 is driven into the ground according to the positioning. During construction, it is important to reserve a sufficient length of the tension-compression composite anchor rod 300 exposed above the ground for later fixation. After the tension-compression composite anchor rod 300 is constructed and reaches the designed bearing capacity, the upper device can be assembled;

[0043] Step 2: Lay the steel plate 102 on top of the pile foundation 100 and place the hydraulic jack 101 on the steel plate 102;

[0044] Step 3: Place the steel plate 102 on the hydraulic jack 101 and hoist the main beam 201. Pay attention to the position of the tension-compression composite anchor rod 300 during hoisting.

[0045] Step 4: Hoist the distribution beam 202 on the main beam 201;

[0046] Step 5: Hoist the secondary beam 203 on the distribution beam 202;

[0047] Step 6: Tighten and connect the ends of the secondary beam 203 and the main beam 201 with the upper ends of their corresponding tension-compression composite anchor rods 300;

[0048] Step 7: The hydraulic jack 101 applies pressure to the main beam 201 and the pile foundation 100 to start testing the bearing capacity of the pile foundation 100 .

[0049] Furthermore, step one also includes: all the tension-compression composite anchor rods 300 are distributed on the same circle, so that the anchor rod fixing points are outside the range 500 of the soil layer affected by the pile foundation test.

[0050] In summary, the pile foundation bearing capacity detection device provided by the present invention has the following advantages:

[0051] 1. The three-level reaction beam structure is composed of main beam, distribution beam and secondary beam, which significantly reduces the bearing capacity requirement of a single reaction beam on the anchor rod and improves the structural stability;

[0052] 2. All tension-compression composite anchor rods are far away from the pile foundation, so that during the pile foundation bearing capacity test, the loose soil around the pile foundation has no effect on the anchor rods, ensuring the installation structural strength of the anchor rods and making the pile foundation bearing capacity test more accurate;

[0053] 3. The combination of steel beams and anchor rods does not require stacking of stone blocks, which makes the space occupied small and easy to install and dismantle;

[0054] 4. The device adopts a tension-compression composite high-bearing capacity reaction anchor solution, which provides a higher guarantee for the safety of the device. The anchor rods in the device are arranged in a circular manner outside the influence range of the tested pile foundation, ensuring that the anchor rods will not be affected by the loosening of the surrounding soil during the pile foundation inspection, and can reduce the length of the main beam and distribution beam.

[0055] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A pile foundation bearing capacity detection device, characterized in that: The invention comprises a steel plate (102), a hydraulic jack (101), a main beam (201), a tension-compression composite anchor rod (300), a secondary beam (203) and a distribution beam (202). The steel plate (102), the hydraulic jack (101), the steel plate (102) and the main beam (201) are sequentially placed on the pile foundation (100) from bottom to top. Both ends of the main beam (201) are fixed to the ground through the tension-compression composite anchor rod (300). There are four secondary beams (203) and the secondary beams (203) are spaced apart from the main beam (201). The included angles are all acute angles, wherein two pairs of the secondary beams (203) are symmetrically distributed on the front side and the rear side of the left end of the main beam (201), and the other two pairs of the secondary beams (203) are symmetrically distributed on the front side and the rear side of the right end of the main beam (201). The distribution beam (202) is placed on the main beam (201), and the paired secondary beams (203) are respectively placed at the two ends of one of the distribution beams (202), and the two ends of the secondary beams (203) are fixed to the ground by the tension-compression composite anchor rods (300).

2. The pile foundation bearing capacity detection device according to claim 1, characterized in that: All the tension-compression composite anchor rods (300) are distributed on the same circle.

3. The pile foundation bearing capacity detection device according to claim 1 or 2, characterized in that: The included angle between the main beam (201) and the secondary beam (203) is 30° to 45°.

4. The pile foundation bearing capacity detection device according to claim 3, characterized in that: The two distribution beams (202) are symmetrically placed 2 to 2.5 meters away from the midpoint of the main beam (201).

5. The pile foundation bearing capacity detection device according to claim 1, characterized in that: The tension-compression composite anchor rod comprises a steel bar body (301) and a steel sleeve (304), wherein the lower end of the steel bar body (301) is fixed on the ground, the upper end of the steel bar body (301) passes through the end of the main beam (201), passes through a steel pad (102), and is then locked and fixed with the steel sleeve (304), and the upper end of the steel bar body (301) passes through the end of the secondary beam (203), passes through a steel pad (102), and is then locked and fixed with the steel sleeve (304).

6. The pile foundation bearing capacity detection device according to claim 5, characterized in that: The tension-compression composite anchor rod further comprises a PVC sleeve (303), a pressure-bearing body (305) and a steel sleeve (304); the steel bar body (301) is sleeved with the PVC sleeve (303) on the part below the ground, and the pressure-bearing body (305) is fixed to the bottom of the PVC sleeve (303).

7. The pile foundation bearing capacity detection device according to claim 5 or 6, characterized in that: The length of the steel bar body (301) of the tension-compression composite anchor rod exposed above the ground is 1.5m to 2m.

8. The pile foundation bearing capacity detection device according to claim 1, characterized in that: The main beams (201) are two cross beams symmetrically arranged front and back.