Static load test pile head capable of replacing pile cap for construction
By using steel casing and pad structure instead of pile caps, the problem of deviation of test results due to accidental factors during pile cap production is solved, and the accuracy and efficiency of test results are achieved.
Patent Information
- Application Number
- CN202421220528.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-30
AI Technical Summary
During the production process of pile caps, due to accidental factors in the concrete strength, support formwork, vibration and maintenance stages, the test results are deviated from the actual situation, and there are obvious shortcomings.
Two steel shields with semicircular cross-sections are used to enclose the top of the pile foundation, and the combined structure of the pad plate and the ear plate is used to replace the pile caps poured by concrete to conduct static load tests.
By replacing pile caps with steel casing, the influence of concrete strength and other factors is reduced, the accuracy of test results is improved, and rapid disassembly and efficient tests are achieved.
Smart Images
Figure CN222435374U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of pile foundation construction, and in particular to a static load test pile head that can replace pile cap construction. Background Art
[0002] Pile cap is one of the commonly used components in building pile foundation engineering. It is usually installed on the top of the pile to increase the load-bearing area of the pile and improve the bearing capacity and stability of the pile foundation. The pile cap is generally made of reinforced concrete, with a large cross-sectional area and high structural strength. It can withstand the load from the upper structure and transfer it to the pile foundation.
[0003] When the pile cap is made of reinforced concrete, the test results may be affected by accidental factors in the production process such as concrete strength, formwork, vibration, and maintenance, resulting in deviations between the test results and the actual situation, which is obviously insufficient. Utility Model Content
[0004] In order to improve the accuracy of the test results, the present application provides a static load test pile head that can replace the pile cap construction.
[0005] The static load test pile head provided in this application, which can replace the pile cap construction, adopts the following technical solution:
[0006] A static load test pile head that can replace pile cap construction includes two steel casings with semicircular cross-sections. The two steel casings are enclosed in a tubular shape and slidably sleeved on the pile foundation. Pads for pressing the top of the pile foundation are arranged inside the steel casings. Ear plates are respectively arranged on both sides of the circumference of the steel casings. The ear plates of the two steel casings are detachably connected.
[0007] By adopting the above technical solution, during the test, workers enclose two steel casings on the top of the pile foundation, and then assemble them. Then the test equipment applies pressure to the steel casings, and the pad applies pressure to the top of the pile foundation. The steel casing replaces the concrete poured pile cap, which is uniform and efficient, and can reduce the influence of accidental factors in the concrete strength, formwork, vibration and maintenance stages during the pile cap production, and improve the accuracy of the test results.
[0008] Optionally, the ear plates of the two steel casings are bolted together by tightening bolts.
[0009] By adopting the above technical solution, the two steel casings are bolted together, which is convenient for disassembly and assembly.
[0010] Optionally, a rubber gasket is placed on the pad, and the rubber gasket is in close contact with the inner wall of the steel casing.
[0011] By adopting the above technical solution, since there is flexible contact between the rubber gasket and the pad, the load that can be borne is greater than that of the conventional method for making the pile cap, and the process of applying the load is relatively simple.
[0012] Optionally, on the opposite sides of two corresponding ear plates, one side is hinged and closely attached to a first rotating plate, and the other side is closely attached to a second rotating plate. An insert arc plate is arranged between the first rotating plate and the second ear plate, and an arc slot is opened on the ear plate for the insert arc plate to be inserted into.
[0013] By adopting the above technical solution, workers manually rotate the first rotating plate and the second rotating plate, and insert the arc plate into the arc slot, so as to realize the rapid disassembly and assembly of the two steel casings.
[0014] Optionally, a torsion spring is provided at the hinge between the first rotating plate and the ear plate.
[0015] By adopting the above technical solution, when disassembling, the deformation force of the torsion spring acts on the first rotating plate, thereby driving the plug-in arc plate to automatically disengage from the arc slot.
[0016] Optionally, the second rotating plate is connected to a pull plate via a tension spring, and two elastic rods are provided on the pull plate which are parallel to each other and have a distance between them. Two corresponding ear plates and the second rotating plate are coaxially provided with through holes for the elastic rods to pass through, and both elastic rods are provided with barbs for hooking the side walls of the ear plates where the first rotating plate is located.
[0017] By adopting the above technical solution, when the second rotating plate is close to the ear plate, the elastic rod passes through the through hole under the action of the tension spring, and the barb is hooked to the side wall of the corresponding ear plate, thereby improving the connection strength between the two steel casings.
[0018] Optionally, a pull ring is provided on the side of the pull plate facing away from the second rotating plate.
[0019] By adopting the above technical solution, the pull ring makes it convenient for workers to manually pull the pull plate.
[0020] Optionally, there is a distance between the barb and the end of the elastic rod passing through the through hole.
[0021] By adopting the above technical solution, during disassembly, the worker manually pinches the ends of the two elastic rods to move them closer to each other, so as to facilitate the reverse penetration of the barb from the through hole.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. During the test, workers enclose two steel casings on the top of the pile foundation and then assemble them. Then the test equipment applies pressure to the steel casings, and the pad applies pressure to the top of the pile foundation. The steel casings replace the concrete poured pile caps, which are uniform and efficient, and can reduce the influence of accidental factors in the concrete strength, formwork, vibration and maintenance stages during the pile cap production, and improve the accuracy of the test results;
[0024] 2. The worker manually rotates the first rotating plate and the second rotating plate, and inserts the arc plate into the arc slot, thereby realizing the rapid disassembly and assembly of the two steel casings;
[0025] 3. When the second rotating plate is close to the ear plate, the elastic rod passes through the through hole under the action of the tension spring, and the barb is hooked tightly to the side wall of the corresponding ear plate, thereby improving the connection strength between the two steel casings. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural diagram of Example 1 of the present application.
[0027] Figure 2 It is an exploded view between the rubber gasket, steel casing and fastening bolts in Example 1 of the present application.
[0028] Figure 3 It is a structural diagram of Example 2 of the present application.
[0029] Figure 4 It is a cross-sectional view of the positional relationship between the first rotating plate, the second rotating plate and the plug-in arc plate in Example 2 of the present application.
[0030] Explanation of the reference numerals: 1. steel casing; 2. pile foundation; 3. pad; 4. ear plate; 401. arc slot; 5. fastening bolt; 6. rubber pad; 7. first rotating plate; 8. second rotating plate; 9. plug-in arc plate; 10. pull plate; 11. elastic rod; 12. through hole; 13. barb; 14. pull ring; 15. tension spring. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-4 This application is described in further detail.
[0032] Example 1
[0033] The embodiment of the present application discloses a static load test pile head which can replace the pile cap construction.
[0034] Reference Figure 1 The static load test pile head which can replace the pile cap construction includes two steel casings 1 with semicircular cross sections, the longitudinal sections of the steel casings 1 are T-shaped, and the two steel casings 1 are enclosed in a tubular shape and are slidably sleeved on the pile foundation 2.
[0035] Reference Figure 1 and Figure 2 A pad 3 for compressing the top of the pile foundation 2 is integrally formed on the inner wall of the steel casing 1. The two pads 3 are enclosed in a circular plate shape. Ear plates 4 are integrally formed on both sides of the circumference of the steel casing 1. The ear plates 4 of the two steel casings 1 are detachably connected.
[0036] Reference Figure 1 and Figure 2During the test, workers enclose two steel casings 1 on the top of the pile foundation 2 and then assemble them. Then the test equipment applies downward pressure to the steel casing 1, and the pad 3 applies pressure to the top of the pile foundation 2 at the same time.
[0037] The present application uses a steel casing 1 to replace the concrete poured pile cap, which has uniformity and high efficiency, can reduce the influence of accidental factors in the pile cap production stages such as concrete strength, formwork, vibration and maintenance, and improve the accuracy of the test results.
[0038] Reference Figure 1 and Figure 2 The ear plates 4 of the two steel casings 1 are bolted together by fastening bolts 5, which are convenient for assembly and disassembly, and can be customized according to the size of the pile foundation 2, which is convenient and fast and is not limited by the size of the pile foundation 2.
[0039] Reference Figure 1 and Figure 2 In the present application, two steel casings 1 cooperate to wrap the top of the pile foundation 2 to replace the traditional concrete pile cap. Compared with the long time spent on making and maintaining the pile cap, the present application has the advantages of simple combination and operation, short construction period, reuse of various components, cost saving, material saving, high test accuracy, and while improving the test efficiency, it also achieves good economic benefits.
[0040] Reference Figure 1 and Figure 2 A rubber pad 6 is placed on the pad 3, and the rubber pad 6 is in close contact with the inner wall of the steel casing 1. During the pressure test, the rubber pad 6 can protect the top of the pile foundation 2 from deformation, play a role in protecting the pile head and save a lot of costs caused by the construction of the concrete pile cap.
[0041] The implementation principle of Example 1 is as follows: during the test, workers enclose two steel casings 1 on the top of the pile foundation 2, then bolt the ear plates 4 of the two together by tightening bolts 5, and then put the rubber pad 6 between the two steel casings 1. Then the test equipment applies downward pressure to the rubber pad 6, and the pad 3 simultaneously applies pressure to the top of the pile foundation 2. The steel casing 1 and the rubber pad 6 replace the concrete poured pile cap, which has uniformity and high efficiency, can reduce the influence of accidental factors in the stages of concrete strength, formwork, vibration and maintenance during the production of the pile cap, and improve the accuracy of the test results.
[0042] Example 2
[0043] Reference Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that: one side of the two corresponding ear plates 4 on opposite sides is hinged and closely attached to the first rotating plate 7, and a torsion spring is arranged at the hinge between the first rotating plate 7 and the ear plate 4.
[0044] The other side is tightly attached to the second rotating plate 8, and an inserting arc plate 9 is integrally formed between the first rotating plate 7 and the second rotating plate 8. The ear plate 4 is provided with an arc slot 401 for the inserting arc plate 9 to be inserted into. The centers of the circles corresponding to the inserting arc plate 9 and the arc slot 401 are both located on the hinge center line of the first rotating plate 7.
[0045] Reference Figure 3 and Figure 4 When the two steel casings 1 are accurately assembled, the worker manually rotates the first rotating plate 7, and the second rotating plate 8 is synchronously rotated to be close to the side wall of the corresponding ear plate 4, and the arc plate 9 is inserted into the arc slot 401.
[0046] Reference Figure 3 and Figure 4 The second rotating plate 8 is connected to a pulling plate 10 through a tension spring 15, and two elastic rods 11 are integrally formed on the pulling plate 10, which are parallel to each other and have a spacing therebetween. The elastic rods 11 are made of elastic metal, and two corresponding ear plates 4 and the second rotating plate 8 are coaxially provided with through holes 12 for the elastic rods 11 to pass through. The two elastic rods 11 are integrally formed with barbs 13 for hooking the side walls of the ear plates 4 where the first rotating plate 7 is located.
[0047] Reference Figure 3 and Figure 4 When the second rotating plate 8 is close to the ear plate 4, the elastic rod 11 passes through the through hole 12 under the action of the tension spring 15, and the barb 13 hooks the side wall of the corresponding ear plate 4, thereby improving the connection strength between the two steel casings 1.
[0048] Reference Figure 4 A pull ring 14 is integrally formed on one side of the pull plate 10 facing away from the second rotating plate 8 . The provision of the pull ring 14 facilitates workers to manually pull the pull plate 10 .
[0049] Reference Figure 4 There is a distance between the barb 13 and the end of the elastic rod 11 passing through the through hole 12 , and the worker manually pinches the ends of the two elastic rods 11 closer to each other, so as to facilitate the barb 13 to pass through the through hole 12 in the reverse direction.
[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A static load test pile head that can replace pile cap construction, characterized by: The invention comprises two steel casings (1) with semicircular cross-sections, the two steel casings (1) are enclosed in a tubular shape and are slidably sleeved on a pile foundation (2), a pad (3) for pressing the top of the pile foundation (2) is arranged inside the steel casing (1), ear plates (4) are respectively arranged on both sides of the circumference of the steel casing (1), and the ear plates (4) of the two steel casings (1) are detachably connected.
2. The static load test pile head capable of replacing pile cap construction according to claim 1 is characterized in that: The ear plates (4) of the two steel casings (1) are bolted together by fastening bolts (5).
3. The static load test pile head capable of replacing pile cap construction according to claim 1, characterized in that: A rubber gasket (6) is placed on the pad (3), and the rubber gasket (6) is in close contact with the inner wall of the steel casing (1).
4. The static load test pile head capable of replacing pile cap construction according to claim 1, characterized in that: The opposite sides of the two corresponding ear plates (4) are hinged on one side and closely attached to a first rotating plate (7), and the other side is closely attached to a second rotating plate (8). An inserting arc plate (9) is arranged between the first rotating plate (7) and the second ear plate (4). The ear plate (4) is provided with an arc slot (401) for the inserting arc plate (9) to be inserted into.
5. The static load test pile head capable of replacing pile cap construction according to claim 4 is characterized in that: A torsion spring is provided at the hinge between the first rotating plate (7) and the ear plate (4).
6. The pile head for static load test that can replace pile cap construction according to claim 4 is characterized by: The second rotating plate (8) is connected to a pulling plate (10) via a tension spring (15), and the pulling plate (10) is provided with two elastic rods (11) which are parallel to each other and have a spacing therebetween. Two corresponding ear plates (4) and the second rotating plate (8) are coaxially provided with through holes (12) for the elastic rods (11) to pass through, and the two elastic rods (11) are both provided with barbs (13) for hooking the upper side wall of the ear plate (4) where the first rotating plate (7) is located.
7. The static load test pile head capable of replacing pile cap construction according to claim 6 is characterized in that: A pull ring (14) is provided on the side of the pull plate (10) facing away from the second rotating plate (8).
8. The pile head for static load test that can replace pile cap construction according to claim 6 is characterized by: There is a distance between the barb (13) and the end of the elastic rod (11) passing through the through hole (12).