CN218766237U - Geotextile wide strip tensile test sample preparation device - Google Patents

Abstract

The utility model provides a geotextile width tensile test sample preparation facilities, includes square board, and square board is equipped with well wire casing, and well wire casing parallels with the broadside of square board and the extension line of well wire casing intersects with the mid point on the long limit of square board, and the both sides of well wire casing all are equipped with the groove of keeping silent parallel with it, and two distances of keeping silent groove to well wire casing equal, well wire casing and keep silent the groove and be equipped with the test groove parallel with well wire casing. The utility model discloses can be accurate quick carry out the mark to geotextile width tensile test sample, conveniently tailor, can be accurate moreover to test sample's centre gripping and deformation instrument mounted position location, make test speed improve greatly, the test result is accurate reliable.

Description

Geotextile wide strip tensile test sample preparation device

Technical Field

The utility model belongs to the technical field of the sample preparation, especially, relate to a geotextile width tensile test sample preparation facilities.

Background

The geotextile is one of very important materials in engineering construction, is widely applied to the construction fields of traffic, energy, water conservancy, environment and the like, and the tensile strength and the elongation rate obtained by a wide strip tensile test are important indexes reflecting the performance of the geotextile. The wide strip tensile test requires that at least 5 test pieces are cut from a representative sample without folding, crease or wrinkle in the longitudinal and transverse directions, the final width of each test piece is (200 +/-1) mm, the length of each test piece meets the requirement of a clamp spacing of 100mm, and the length direction of each test piece is parallel to the direction of an applied load.

When a sample is clamped, firstly, the gauge of an upper clamp and a lower clamp of the instrument is corrected to be (100 +/-3) mm, the sample is clamped in the clamps in a centering way, the length direction of the sample in the longitudinal test and the transverse test is parallel to the direction of a load, generally, two marking lines which are transverse to the width direction of the sample and are separated by 100mm are drawn in advance, and the two marking lines are overlapped with the edges of the upper clamp jaw and the lower clamp jaw as far as possible when the sample is clamped.

And when the extensometer is installed, marking points are respectively arranged on the sample at a distance of 60mm, the marking points are respectively at a distance of 30mm from the center point of the sample, and the extensometer is firmly fixed. Usually, two marking lines which are spaced apart by 60mm across the width direction of the sample and are bilaterally symmetrical to the center point of the sample are drawn in advance for accurately mounting and fixing the extensometer.

After specimen clamping and extensometer installation was complete, the tensile tester was started, a preload of 1% of the predicted maximum load was applied to determine the start of the initial elongation test, and the load was continued until the specimen broke.

At present, manual ruler positioning is generally adopted for preparing and cutting wide tensile test samples, so that the time is long, the work efficiency is low, the cutting size is not accurate, and the accuracy of test results is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the above-mentioned technical problem that exists among the prior art, provide a geotextile width tensile test sample preparation facilities, conveniently tailor, guarantee to tailor the size accurate, can accurate centre gripping and the deformation instrument mounted position location to test sample moreover, make test speed improve greatly, the test result is accurate reliable.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a geotextile width tensile test sample preparation facilities which characterized in that: the middle-line slot is parallel to the wide side of the square plate, the extension line of the middle-line slot intersects with the middle point of the long side of the square plate, the two sides of the middle-line slot are provided with jaw slots parallel to the middle-line slot, the distances from the two jaw slots to the middle-line slot are equal, and the middle-line slot and the jaw slots are provided with test slots parallel to the middle-line slot. Tiling the test sample of geotextile behind the workstation, arrange this device in it, through drawing a line along the outward flange of square board, can confirm the tailorring sideline of test sample of geotextile, later through drawing a line mark the test sample of geotextile at the central line groove with the groove of keeping silent, when the follow-up sample tensile test of being convenient for, can make things convenient for accurate centre gripping sample, improve test speed. The test groove can be convenient for mark the geotextile test sample, and is convenient for accurate installation of a subsequent extensometer. Through the setting of square board, the accurate test sample of can being convenient for add hold with the deformation instrument installation location, improve and tailor speed, improve the efficiency of test sample processing to improve the accuracy of test result.

Furthermore, the middle part of the square plate is fixedly connected with a handle. The square plate can conveniently be moved and carried in the setting of handle, can the fixed square plate of application of force when the mark geotextile test sample simultaneously, avoids its removal.

Furthermore, the square plate is made of organic glass, plastic or metal. Adopt the organic glass material, whole transparency is better, can observe the tiling state of the test sample in the square board, guarantees the accuracy of mark. The plastic material is processed by a model, so that the production is easy and the cost is low. The metal material has better durability, long service life and difficult deformation.

Further, the size of the square plate matches the size of the test specimen.

Furthermore, one side of the test slot is provided with a scale. Through the setting of scale, can be convenient for accurate mark extensometer installation department on geotextile test sample, be 30mm apart from sample central point bilateral symmetry promptly.

The utility model discloses owing to adopted above-mentioned technical scheme, following beneficial effect has:

the utility model discloses can be accurate quick carry out the mark to the wide tensile test sample of geotextile, conveniently tailor, can be accurate moreover to the centre gripping of test sample and warp the instrument mounted position location, sample preparation work is accurate, high-efficient, not only makes test speed improve greatly, and the sample size is accurate, guarantees that the test result is true reliable.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is the utility model discloses a geotextile width tensile test sample preparation facilities's schematic structure.

In the figure, 1 is a square plate; 2-a middle wire groove; 3-a jaw groove; 4-a test slot; 5-a handle; 6-a scale; 7-the long side of the square plate; 8-the broadside of the square panel.

Detailed Description

As shown in fig. 1, for the utility model relates to a geotextile width tensile test sample preparation facilities, including square board 1, square board 1 is equipped with well wire casing 2, and well wire casing 2 parallels with the broadside 8 of square board 1 and the extension line of well wire casing 2 intersects with the mid point of the long limit 7 of square board 1, and the both sides of well wire casing 2 all are equipped with the groove of keeping silent parallel with it, and two grooves of keeping silent equal to the distance of well wire casing 2, and well wire casing 2 and groove 3 of keeping silent are equipped with the test groove 4 parallel with well wire casing 2. After the test sample tiling of geotextile, arrange the device on it, through drawing a line along the outward flange of square 1, can confirm the side of tailorring of test sample of geotextile, later through drawing a line at central line groove 2 and jaw groove 3 and mark test sample of geotextile, when being convenient for follow-up sample tensile test, can make things convenient for accurate centre gripping sample, improve test speed. The test slot 4 can facilitate marking of geotextile test samples, facilitating accurate installation of subsequent extensometers. Through the setting of square board 1, can be convenient for the accuracy to test sample's centre gripping and deformation instrument installation location, improve and tailor speed, improve the efficiency of test sample processing to improve the accuracy of test result.

The middle part of the square plate 1 is fixedly connected with a handle 5. The square plate 1 can conveniently be moved and carried in the setting of handle 5, can the fixed square plate 1 of application of force when the mark geotextile test sample simultaneously, avoids its removal.

The square plate 1 is made of organic glass, plastic or metal. Adopt the organic glass material, whole transparency is better, can observe the tiling state of the test sample in the square board 1, guarantees the accuracy of mark. The plastic material is processed by the model, so that the production is easy and the cost is low. The metal material has better durability, long service life and difficult deformation.

The dimensions of the square plate 1 were matched to those of the test specimens.

One side of the test slot 4 is provided with a scale 6. Through the setting of scale 6, can be convenient for accurate mark extensometer installation department on geotextile test sample, be 30mm apart from sample central point bilateral symmetry promptly.

The distance between the two jaw grooves 3 is 100mm, and the two jaw grooves are symmetrically arranged at the two sides of the central line groove 2; the distance between the two test slots 4 is 60mm, and the two test slots are symmetrically arranged on two sides of the central line. The width of the jaw groove 3, the test groove 4 and the middle wire groove 2 is 1mm.

The width of the square plate 1 is (200 +/-1) mm, the length is 205mm, and the thickness is 2mm.

The distance between the jaw groove 3 and the test groove 4 is matched with the requirement of a test sample.

When the sample is cut, the substituted geotextile sample is flatly placed on a workbench, and the sample is smooth and has no obvious appearance defects such as crease, holes, stains and the like. The device is horizontally placed on a sample, a handle 5 is held by one hand, a marker pen is used for marking along the periphery of a square plate 1 by the other hand, then the marking is carried out along two jaw grooves 3 and a test groove 4, finally the marking is carried out along a middle wire groove 2, and a mark point for testing the elongation rate is made on the test groove 4 at the same scale position of a scale 6.

The device is taken away, and a sample is cut and cut along the 1 line of the square plate to be drawn by scissors or an art designing knife.

And (5) humidifying the cut sample according to requirements, and then carrying out a test. And (3) installing the sample, clamping the sample by using the two clamp jaws along the line drawn by the jaw groove 3, and enabling the two marking lines to be superposed with the edges of the upper clamp jaw and the lower clamp jaw as far as possible when clamping the sample. The extensometers are then mounted at the marked points made by the two test slots 4.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are all covered by the scope of the present invention.

Claims (5)

1. The utility model provides a geotextile width tensile test sample preparation facilities which characterized in that: the middle-line groove is parallel to the wide side of the square plate, the extension line of the middle-line groove is intersected with the middle point of the long side of the square plate, jaw grooves parallel to the middle-line groove are formed in the two sides of the middle-line groove, the distances from the two jaw grooves to the middle-line groove are equal, and test grooves parallel to the middle-line groove are formed in the middle-line groove and the jaw grooves.

2. The geotextile wide strip tensile test sample preparation device of claim 1, wherein: the middle part of the square plate is fixedly connected with a handle.

3. The geotextile wide strip tensile test sample preparation device of claim 1, wherein: the square plate is made of organic glass materials, plastic materials or metal materials.

4. The geotextile wide strip tensile test sample preparation device of claim 1, wherein: the dimensions of the square plate are matched with those of the test specimen.

5. The geotextile wide strip tensile test sample preparation device of claim 1, wherein: one side of the test slot is provided with a scale.

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