Geocell node tensile test device

Abstract

The utility model provides an earthwork standard room node opposite-pulling experiment device which comprises an upper clamp and a lower clamp which are the same in structure, and each clamp comprises a base, a cross beam, a left sliding block, a right sliding block, a locking block and a locking nut. The base is fixedly connected with the top of the cross beam, the left sliding block and the right sliding block are installed on the cross beam in a sliding mode, locking blocks are arranged in the sliding blocks, and gaps allowing geocell strips to penetrate through are formed between the top faces of the locking blocks and the bottom face of the cross beam. A locking bolt is arranged at the bottom of the sliding block, the position of the locking block in the sliding block is adjusted by rotating the locking bolt, the size of the gap is adjusted, and the geocell strip is clamped or loosened. When in use, the upper clamp and the lower clamp are connected with a lifting device, two adjacent strips of four strips extending out of the joint of the geocell are fixed on the upper clamp, the other two strips are fixed on the lower clamp, and then a counter-pulling test is carried out. The device is easy to operate and convenient to assemble and disassemble, and the working efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to geosynthetic material technical field, concretely relates to a geocell joint point tensile test device. BACKGROUND

[0002] Geocell is a three-dimensional net structure body of quadrilateral or polygonal honeycomb shape which is connected by welding, fusion, injection molding and mortise and tenon process and which is expanded. Geocell is widely used in geotechnical engineering construction such as foundation treatment, embankment, retaining wall and slope protection as a new type of three-dimensional honeycomb reinforced material. Geocell can provide more effective hoop constraint for coarse sand, gravel and other fillers by forming a three-dimensional honeycomb structure through joint connection, thereby significantly improving the strength and bearing capacity of the structure and reducing settlement.

[0003] The joint point is an important part of geocell to bear and transfer load, and if the joint point is damaged, unbalanced load transfer will occur, which will lead to local instability in the structure and thus the overall damage of the geocell reinforced structure.

[0004] The joint point tensile test is one of the main tests for testing the performance of geocell joint points, in which a tensile device is used to clamp a geocell strip sample with a joint point in the middle, and then an axial force is applied until the sample is damaged. However, there are many types of geocell, and special clamping equipment is needed for each type of geocell during the test, which is difficult to replace. Moreover, a part of the clamping equipment is prone to slipping during the test, and the test results are not accurate.

[0005] Therefore, in view of the above problems, there is an urgent need to provide a geocell joint point tensile test device. UTILITY MODEL CONTENTS

[0006] The utility model discloses to solve the problem that the fixture and geocell strip sample are prone to slipping between each other during the geocell joint point tensile test, which affects the accuracy of the tensile performance test of the geocell joint point and further affects the application of the geocell in geotechnical engineering construction such as foundation treatment, embankment, retaining wall and slope protection, and the problem that the fixture is not universal, and provides a geocell joint point tensile test device.

[0007] The utility model discloses to solve the problem that the fixture and geocell strip sample are prone to slipping between each other during the geocell joint point tensile test, which affects the accuracy of the tensile performance test of the geocell joint point and further affects the application of the geocell in geotechnical engineering construction such as foundation treatment, embankment, retaining wall and slope protection, and the problem that the fixture is not universal, and provides a geocell joint point tensile test device.

[0008] A geocell joint point tensile test device, comprising an upper clamp and a lower clamp, the upper clamp and the lower clamp are the same in structure.

[0009] The structure of the upper clamp and the lower clamp comprises a base, a beam, a left sliding block, a right sliding block, a locking block and a locking nut; the base is fixedly connected with the top of the beam; the left sliding block and the right sliding block are the same in structure and are slidingly installed on the beam; the inner part of the left sliding block and the right sliding block is respectively provided with the locking block, and a gap allowing the geocell strip to pass through is formed between the top surface of the locking block and the bottom surface of the beam; the bottom of the left sliding block and the right sliding block is provided with the locking bolt, the top of the locking bolt acts on the locking block, the position of the locking block in the sliding block is adjusted by rotating the locking bolt, and then the size of the gap is adjusted to realize clamping or loosening the geocell strip.

[0010] In the above technical solution, the base is cylindrical.

[0011] In the above technical solution, the base is fixedly connected with the top center position of the beam.

[0012] In the above technical solution, a radial through hole is arranged on the base, and the pin is inserted into the radial through hole and the beam of the stretching equipment to realize the connection with the beam of the stretching equipment.

[0013] In the above technical solution, the beam is a cuboid, and a lengthwise groove is formed in the left and right side surfaces of the beam; the cross section of the left sliding block and the right sliding block is C-shaped, and the inner convex parts on the two sides of the top end of the left sliding block and the right sliding block are slidingly installed in the lengthwise grooves on the two sides of the beam to realize the sliding cooperation.

[0014] In the above technical solution, the height of the locking block is smaller than the distance between the bottom of the sliding block and the beam, so that the gap allowing the geocell strip to pass through is formed between the top surface of the locking block and the bottom surface of the beam.

[0015] In the above technical solution, the top surface of the locking block is provided with a patterned groove to increase the friction between the locking block and the geocell strip.

[0016] In the above technical solution, three locking bolts are arranged on each of the left sliding block and the right sliding block, and the three locking bolts are arranged in a straight line.

[0017] The utility model has the advantages and beneficial effects that:

[0018] The utility model is simple in operation, convenient to assemble and disassemble, and greatly improves the work efficiency. The test device effectively solves the problem that the geocell strip and the clamp slip to affect the accuracy of the tensile performance test of the geocell joint and the problem that different forms of geocell strips are replaced by different clamps.

[0019] The utility model has the advantages of simple structure, low manufacturing cost, meeting the market demand of mass production, effectively reducing the investment of test cost, and avoiding material waste.

[0020] The utility model discloses improve geocell node tensile performance test accuracy, solve the major problem of geocell in the application of geotechnical engineering construction such as ground treatment, embankment, retaining wall, slope protection. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the geocell node tensile test device using state schematic drawing of the utility model.

[0022] Figure 2 It is the upper clamp structure schematic drawing of the geocell node tensile test device of the utility model.

[0023] For the ordinary skilled person in the art, other related drawings can be obtained according to the above drawings without creative labor. DETAILED DESCRIPTION

[0024] In order to make the person in the art better understand the utility model scheme, the technical scheme of the utility model is further explained below in combination with specific embodiments.

[0025] Referring to the accompanying Figure 1 The utility model discloses a geocell node tensile test device, including upper clamp 11 and lower clamp 12, the structure of upper clamp and lower clamp is same, the use process is connected with the upper crossbeam of pulling up equipment in upper clamp, and the lower clamp is connected with the lower crossbeam of stretching equipment, fixes two strip bands of four strip bands 13 of geocell node place extension in upper clamp, and the other two strip bands are fixed in lower clamp, then carries out tensile test, and tests the tensile strength of geocell node.

[0026] Referring to the accompanying Figure 2The upper and lower clamps have the following structures: a base 1, a crossbeam 2, a left slider 3, a right slider 4, a locking block 5, and a locking nut 6. The base 1 is preferably cylindrical and is fixedly connected to the top center of the crossbeam 2 (by welding, riveting, or bolting). The base 1 has a radial through hole 1-1, which is used to connect to the crossbeam of the stretching equipment by inserting a pin into the radial through hole. The crossbeam 2 is rectangular with an "I"-shaped cross section and continuous grooves 2-1 on its left and right sides. The left slider 3 and right slider 4 have the same structure, with a "C"-shaped cross section. The left slider 3 and right slider 4 are slidably mounted on the crossbeam 2 (i.e., the inner protruding parts on both sides of the top of the left slider 3 and right slider 4 are slidably mounted in the continuous grooves 2-1 on both sides of the crossbeam 2). To achieve a sliding fit, the left slider 3 and right slider 4 can slide freely along the crossbeam. Each of the left slider 3 and right slider 4 has a locking block 5 inside. The height of the locking block is smaller than the distance between the bottom of the slider and the crossbeam 2, creating a gap 7 between the top surface of the locking block 5 and the bottom surface of the crossbeam 2, allowing the geocell strip to pass through. The top surface of the locking block 5 has a patterned groove (preferably a diamond-shaped groove) to increase the friction between the locking block 5 and the geocell strip. The bottom of the left slider 3 and right slider 4 has a locking bolt 6. The top of the locking bolt 6 acts on the locking block 5. By rotating the locking bolt 6, the position of the locking block 5 in the slider can be adjusted, thereby adjusting the size of the gap 7 and clamping or loosening the geocell strip. Preferably, each left slider 3 and right slider 4 has three locking bolts 6, arranged at straight intervals.

[0027] The method for using the geocell joint tension test apparatus is as follows:

[0028] Step 1: Connect the base of the upper clamp to the crossbeam of the lifting equipment, and connect the base of the lower clamp to the lower crossbeam of the lifting equipment.

[0029] Step 2: Clamp two adjacent strips from the four strips extending from the node of the geocell to be tested into the gap between the left and right sliders of the upper clamp, respectively. Adjust the positions of the left and right sliders according to the specifications of the geocell to be tested to adjust the angle between the two strips to the required angle for the test. Similarly, clamp the other two strips extending from the node of the geocell to be tested into the gap between the left and right sliders of the lower clamp, and adjust the positions of the left and right sliders to adjust the angle between the two strips to the required angle for the test.

[0030] Step 3: Tighten the locking bolts to clamp the geocell strips with the locking blocks.

[0031] Step 4: Start the tensile testing equipment to conduct a tensile test on the geocell joint. After the test, turn off the tensile testing equipment.

[0032] Step five: unscrew the locking bolt, take out the strip of geocell.

[0033] Step six: detach the upper and lower clamps from the tensioning device.

[0034] The above has made the exemplary description to the utility model, should explain is, in not departing from the core case of the utility model, any simple deformation, modification or other equivalent replacement of the person skilled in the art can not spend the protection scope of the utility model that falls into the utility model of creative labor.

Claims

1. A geocell node pair pull test apparatus, characterized by: The upper clamp and the lower clamp are identical in structure; The upper clamp and the lower clamp are identical in structure, and each comprises a base, a beam, a left sliding block, a right sliding block, a locking block and a locking nut.

2. The geocell junction pull test apparatus of claim 1, wherein: The base is fixedly connected to the top of the beam.

3. The geocell junction pull test apparatus of claim 1, wherein: The base is fixedly connected to the top of the beam.

4. The geocell junction pull test apparatus of claim 2, wherein: The base is fixedly connected to the top of the beam.

5. The geocell junction pull test apparatus of claim 1, wherein: The base is fixedly connected to the top of the beam.

6. The geocell junction pull test apparatus of claim 1, wherein: The base is fixedly connected to the top of the beam.

7. The geocell junction pull test apparatus of claim 1, wherein: The base is fixedly connected to the top of the beam.

8. The geocell junction pull test apparatus of claim 1, wherein: The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base is fixedly connected to the top of the beam. The base

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