Portable reference device for static load test

Abstract

The utility model provides a portable reference device for a static load test, which relates to the technical field of engineering detection and comprises two reference piles and a reference beam, and the reference beam consists of a plurality of short beams. The same sides of the two ends of each short beam are each fixedly provided with a hinge blade, namely the first hinge blade and the second hinge blade, and the sides, away from the short beams, of the two hinge blades are each provided with a corresponding hinge sleeve used for butt joint. Besides, the two hinge blades between the adjacent short beams are hinged through a detachable pin shaft, so that stable assembly and disassembly of the datum beam are ensured, and meanwhile, the first hinge blade and the second hinge blade which are hinged can be closed towards the outer side. According to the utility model, the reference beam is divided into a plurality of sections of short beams which are hinged and assembled by adopting the detachable hinge blades, so that the reference beam is lighter and easier to carry, and static load tests can be conveniently carried out in different places.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering detection, in particular to a portable reference device for static load testing. Background Art

[0002] Static load testing is a widely used test method in engineering for assessing the bearing capacity of piles and foundations. This method applies pressure or thrust in stages and observes the associated displacement changes to infer the bearing capacity of the piles or foundations. However, in practical applications, the selection and installation of reference piles and reference beams present a number of challenges. Currently, engineers use either steel pipes driven into the ground for reference piles and hollow square steel for reference beams; or both the reference piles and reference beams are processed into triangular trusses using square steel; or a welded steel pipe truss is used as the reference beam, with one end simply supported and the other secured with fasteners. However, due to the length of the reference beam, it is often difficult to carry and transport, which inconveniences the test. Furthermore, improper installation can lead to inaccurate test data and even significant errors due to deformation. To address these issues, it is necessary to develop a more portable, stable, and reliable reference pile and reference beam to improve the accuracy and operability of static load testing and better serve the field of geotechnical engineering testing. Utility Model Content

[0003] To achieve the above-mentioned purpose, the present invention provides a portable reference device for static load testing, which adopts the following technical solutions:

[0004] A portable reference device for static load testing comprises two reference piles and a reference beam, wherein the reference beam is composed of multiple short beam sections. A hinge blade, designated a first hinge blade and a second hinge blade, is fixed to the same side of each short beam's two ends. The two blades are provided with corresponding hinge sleeves on the sides facing away from the short beam for docking. Furthermore, the two hinge blades between adjacent short beams are hingedly connected by a detachable pin to ensure stable assembly and disassembly of the reference beam. The hinged first and second hinge blades can be closed outward.

[0005] The reference pile includes a plug rod, the upper end of the plug rod is fixed with a U-shaped square groove, the inner size of the U-shaped square groove matches the cross-sectional size of the short beam to ensure that the reference beam can be firmly mounted on the reference pile, a slidable sleeve is sleeved on the plug rod, and a limiter is also provided on the sleeve, and the limiter is used to fix the sleeve on the plug rod, and the limiter is a hole opened on the sleeve and a fixing bolt is screwed on the sleeve. The position of the sleeve on the plug rod can be controlled by the fixing bolt, and a tripod is fixed on the sleeve. When in use, the plug rod is inserted into the stratum to a certain depth, and the tripod legs are inserted into the soil layer. One end of the reference beam is placed in the U-shaped square groove of the reference pile as a fixed end and fixed with a fastening device, and the other end is simply supported in the U-shaped square groove on another reference pile as a free end.

[0006] Adjacent short beams are assembled using a hinge with a detachable pin. Two hinge blades are fixed to the ends of the adjacent short beams, allowing each short beam to be hinged together in this manner. During use, the hinge blades of the short beams are placed downward and hinged together sequentially via the pins to form a reference beam. When the two ends of the reference beam are placed on the reference piles, the hinge blades close outward, that is, downward, and gravity causes the hinges to open, allowing the ends of adjacent short beams to fit tightly together.

[0007] Furthermore, the short beams are made of square steel with a thickness greater than 5 mm, and the length of each short beam is greater than 200 mm.

[0008] Furthermore, the insertion rod is made of threaded steel, and the upper end of the insertion rod is fixed to the bottom of the U-shaped square groove by welding.

[0009] Furthermore, the fastening device includes a cover plate disposed at the upper end of the U-shaped square groove, with both sides of the cover plate fastened to the U-shaped square groove via a bolt connection pair. Because the inner dimensions of the U-shaped groove match the cross-sectional dimensions of the short beam, the cover plate at the upper end of the U-shaped square groove can precisely contact the upper end of the short beam. Simultaneously, the cover plate is screwed to the U-shaped groove on both sides to secure the fixed end of the reference beam.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This simple structure makes the reference beam easier to carry by dividing it into multiple shorter sections and employing a detachable hinged joint, making it more portable and convenient for static load testing in various locations. The shorter sections are articulated using hinged blades and detachable pins, simplifying assembly and disassembly of the reference beam and saving time and labor.

[0012] The reference pile uses a rod made of threaded steel, which facilitates driving the reference pile into the ground to a certain depth, reducing test errors. The rod is welded to the U-shaped square groove, and the reference pile length can be welded to different threaded steel lengths according to test needs. The adjustable sleeve ensures that the reference beam can be firmly installed on the reference pile and can adapt to different strata, improving the stability and reliability of the test. The fastening device ensures the firm fixation of the fixed end of the reference beam, reducing errors caused by device movement during the test and improving the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the device according to an embodiment of the present utility model;

[0014] Figure 2 It is a regular triaxial drawing of the short beam in the embodiment of the present utility model;

[0015] Figure 3 It is a front view of the short beam in the embodiment of the present utility model;

[0016] Figure 4 It is a right side view of the short beam in the embodiment of the present utility model;

[0017] Figure 5 A bottom view of the short beam in an embodiment of the present utility model;

[0018] Figure 6 This is a schematic diagram of the installation of adjacent short beams in an embodiment of the present utility model;

[0019] Figure 7 This is a bottom view of the installation of adjacent short beams in an embodiment of the present utility model;

[0020] Figure 8 This is a schematic diagram of the first reference pile in an embodiment of the present utility model;

[0021] Figure 9 for Figure 8 A partial enlarged view of point A in the middle;

[0022] Figure 10 This is a schematic diagram of the second reference pile in an embodiment of the present utility model.

[0023] In the figure: 1. Reference beam; 2. Short beam; 3. First hinge blade; 4. Second hinge blade; 5. Pin; 6. First reference pile; 7. Second reference pile; 8. Insert rod; 9. U-shaped square groove; 10. Casing; 11. Fixing bolt; 12. Tripod; 13. Cover plate; 14. Bolt connection pair. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0026] Reference Figure 1This embodiment provides a portable reference device for static load testing, comprising a first reference pile 6, a second reference pile 7 and a reference beam 1, wherein the reference beam 1 is composed of multiple short beams 2. Figures 2 to 7 Each short beam 2 has two hinge blades fixed to the same side of each end: a first hinge blade 3 and a second hinge blade 4. These two blades are equipped with corresponding hinge sleeves on the side away from the short beam for docking. Furthermore, the two hinge blades between adjacent short beams 2 are hingedly connected by a detachable pin 5 to ensure stable assembly and disassembly of the reference beam 1. The hinged first and second hinge blades 3 and 4 can be closed outwards.

[0027] Reference Figures 8-10 The first reference pile 6 and the second reference pile 7 both include an insertion rod 8, and a U-shaped square groove 9 is fixed to the upper end of the insertion rod 8. The inner size of the U-shaped square groove 9 matches the cross-sectional size of the short beam 2 to ensure that the reference beam can be firmly installed on the reference pile. A slidable sleeve 10 is sleeved on the insertion rod 8, and a limiter is also provided on the sleeve 10. The limiter is used to fix the sleeve on the insertion rod. The limiter is a hole opened on the sleeve 10 and a fixing bolt 11 is screwed on it. The position of the sleeve 10 on the insertion rod 8 can be controlled by the fixing bolt 11, and a tripod 12 is fixed on the sleeve 10.

[0028] Preferably, in this embodiment, the first reference pile 6 is set at the fixed end of the reference beam 1, and one end of the reference beam 1 is fixed by the fastening device on the U-shaped square groove 9, while the second reference pile 7 is set at the other end of the reference beam 1 as a free end.

[0029] Reference Figure 9 The fastening device includes a cover plate 13 arranged at the upper end of the U-shaped square groove 9, and both sides of the cover plate 13 are fastened to the U-shaped square groove 9 through a bolt connection pair 14.

[0030] Preferably, in this embodiment, in order to increase the rigidity of the reference beam 1 , the short beam 2 is made of square steel with a thickness of 5 mm, and the length of each section of the short beam 2 is 220 mm.

[0031] Preferably, in this embodiment, the insertion rod 8 is made of threaded steel, which can reduce the test error after the reference pile is driven into the formation to a certain depth, and the upper end of the insertion rod 8 is fixed to the bottom of the U-shaped square groove 9 by welding. The length of the reference pile can be welded with threaded steel of different lengths as the insertion rod according to the needs of the test.

[0032] Working principle: When in use, the insertion rod 8 is inserted into the ground to a certain depth, the tripod 12 legs are inserted into the soil layer, one end of the reference beam 1 is placed as the fixed end in the U-shaped square groove 9 of the first reference pile 6 and fixed with a fastening device, and the other end is simply supported in the U-shaped square groove 9 of the second reference pile 7 as the free end.

Claims

1. A portable reference device for static load testing, comprising two reference piles and a reference beam, characterized in that: The reference beam is composed of multiple short beams, and a first hinge blade and a second hinge blade are fixed to the same side of each short beam at both ends, respectively. The first hinge blade and the second hinge blade are respectively provided with corresponding hinge sleeves on the side away from the short beam, and the first hinge blades and the second hinge blades between adjacent short beams are hinged by a detachable pin shaft; The two reference piles are respectively a first reference pile and a second reference pile, and the first reference pile and the second reference pile both include an insertion rod, a U-shaped square groove is fixed on the upper end of the insertion rod, the inner size of the U-shaped square groove matches the cross-sectional size of the short beam, a sleeve is sleeved on the insertion rod and can slide along the axial direction of the insertion rod, a tripod is fixed on the sleeve, and a limiter is further provided on the sleeve, and the limiter is used to fix the sleeve on the insertion rod; The first reference pile further includes a fastening device for fixing one end of the reference beam.

2. A portable reference device for static load testing according to claim 1, characterized in that: The hinged first hinge leaf and the second hinge leaf are closed outward.

3. A portable reference device for static load testing according to claim 1, characterized in that: The short beams are made of square steel with a thickness greater than 5 mm, and the length of each short beam is greater than 200 mm.

4. A portable reference device for static load testing according to claim 1, characterized in that: The insertion rod is made of threaded steel, and the upper end of the insertion rod is fixed to the bottom of the U-shaped square groove by welding.

5. A portable reference device for static load testing according to claim 1, characterized in that: The limiting component includes a fixing bolt, a hole is opened on the sleeve, and the fixing bolt is threadedly connected to the sleeve hole.

6. A portable reference device for static load testing according to claim 1, characterized in that: The fastening device includes a cover plate arranged at the upper end of the U-shaped square groove, and both sides of the cover plate are fastened to the U-shaped square groove through bolt connection pairs.

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