CN108254263B - Assembly type multi-size structural plane shear box assembly method based on standard unit limiting block - Google Patents
Assembly type multi-size structural plane shear box assembly method based on standard unit limiting block Download PDFInfo
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- CN108254263B CN108254263B CN201711348435.5A CN201711348435A CN108254263B CN 108254263 B CN108254263 B CN 108254263B CN 201711348435 A CN201711348435 A CN 201711348435A CN 108254263 B CN108254263 B CN 108254263B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
Abstract
A method for assembling a multi-size structural plane shear box based on standard unit limiting blocks comprises the following steps: 1) selecting the size of a test structural surface sample; 2) selecting the number of standard unit limiting blocks in the upper and lower disc shearing boxes; 3) connecting a lifting lantern ring; 4) lifting the lower disc shearing box; 5) assembling a lower shear box standard unit limiting block; 6) placing a structural surface lower disc sample; 7) placing a structural surface hanging disc sample; 8) assembling a standard unit limiting block of the upper shearing box; 9) installing a hoisting ring; 10) lifting the upper disc shearing box; 11) carrying out a direct shear test; 12) disassembling the upper shearing box M; 13) sampling; 14) and disassembling the lower shearing box N and carrying out the next group of shearing tests. The invention has the advantages of good test effect, convenient operation, short construction period, low cost and small occupied space.
Description
Technical Field
The invention relates to an assembling method of an assembled multi-size structural plane shearing box based on a limiting unit, which is suitable for indoor direct shearing tests of series structural plane samples with the same height and size and belongs to the technical field of engineering.
Background
In the human engineering activity, the engineering accidents caused by the deformation and instability of rock masses are endless, which causes huge life and property losses. The research of the size effect of the rock structural surface has important significance for guiding the stability of rock engineering, corresponding rock structural surface shearing boxes are needed for direct shearing tests of the rock structural surfaces with series sizes, a common method is that each rock structural surface sample with various sizes needs one shearing box matched with the size of the sample, the method not only needs a large number of shearing boxes, high manufacturing cost and large occupied space, but also needs to be provided with a direct shear apparatus matching and connecting device corresponding to the shearing boxes with various sizes, and the defects of unreliable test results, complex installation procedures, long test period and the like are easily caused.
Disclosure of Invention
In order to overcome the defects of large quantity, complex process, long test period, large occupied space and the like of a series of multi-size shearing boxes conventionally adopted in a structural surface shear strength size effect test, the invention provides an assembling method of an assembled multi-size structural surface shearing box based on a standard unit limiting block, which has the characteristics of good test effect, convenience in operation, short construction period, low manufacturing cost, small occupied space and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for assembling a multi-size structural plane shear box based on standard unit limiting blocks comprises the following steps:
1) selecting the size of a test structural surface sample: selecting a corresponding structural surface sample according to a test design scheme, formulating a standard limiting unit combination scheme, and carrying out a direct shear test through the following sample loading process;
2) the number of standard unit limiting blocks in the upper and lower disc shearing boxes is selected: in order to effectively fix the structural surface samples in the upper and lower shearing boxes, the number of standard unit limiting blocks in the upper and lower shearing boxes is selected according to the size of the structural surface samples;
3) connecting a hoisting lantern ring: connecting the lifting sleeve with the lifting lug through the lifting sleeve ring bolt, so that the lifting sleeve ring is connected with the outer frame of the lower shear box, and preparing for the next lifting process of the lower shear box;
4) lifting a lower disc shearing box: after the lifting preparation work is finished, the lower disc shearing box is connected with a lifting appliance through a lifting lantern ring, and the lower disc shearing box is lifted to the internal test platform of the direct shear apparatus;
5) assembling a lower shear box standard unit limiting block: according to the size of the lower disc structure surface, a standard unit limiting block is combined, so that the lower disc sample of the structure surface can be stably fixed in the shearing box;
6) placing a structural surface bottom plate sample: placing the structural surface bottom sample in the structural surface bottom sample holding area inside the outer frame of the lower shear box after the assembly in the step 5);
7) placing the disc sample on the structural surface: placing a structural surface upper disc sample on a structural surface lower disc sample, and requiring the upper disc and the lower disc structural surface samples to be matched;
8) assembling a standard unit limiting block of the upper shearing box: the shearing box is laterally placed on the ground, standard unit limiting blocks are combined according to the size of a test sample on the lower disc surface of the structure, and the standard unit limiting blocks are fixed on the outer frame of the upper disc shearing box one by using standard unit limiting fixing bolts, so that the standard unit limiting blocks are prevented from being loosened and separated from the outer frame of the upper disc shearing box;
9) installing a hoisting ring: after the limiting blocks are assembled, the hoisting rings are respectively screwed into the hoisting threaded holes at the bottom of the upper disc shearing box, so that preparation is made for the subsequent hoisting process of the upper disc shearing box;
10) lifting an upper disc shearing box: when the upper disc shearing box is lifted above the lower disc shearing box, the upper disc shearing box and the structural surface upper disc sample are aligned, and the lower disc shearing box is placed after the upper disc shearing box and the structural surface upper disc sample are completely embedded;
11) after the above-mentioned assembling process is completed, the direct shear test can be implemented.
Further, the method comprises the following steps:
12) disassembling the upper shearing box: after the test is finished, hoisting the upper shear box to the ground or a platform, and reassembling a standard limiting unit in the upper shear box according to the size requirement of the next group of structural surface samples;
13) sampling: taking out the structural surface lower disc sample and the structural upper disc sample after shearing failure in the lower shearing box in sequence;
14) disassembling the lower shearing box: taking out the standard limiting unit in the lower shearing box, and reassembling the standard limiting unit in the lower shearing box according to the pattern size requirements of the next group of structural surfaces;
15) the next set of shear tests was performed, and the arrangement and testing of different specimen sizes was performed according to the procedure described above.
Furthermore, the assembled multi-size shearing box based on the standard unit limiting block in the step 8) comprises an upper plate shearing box and a lower plate shearing box,
the lower disc shearing box consists of an outer frame of the lower disc shearing box, a lifting lantern ring, a lantern ring bolt and a standard unit limiting block, and the upper disc shearing box consists of an outer frame of the upper disc shearing box, a standard unit fixing bolt, a lifting ring and a standard unit limiting block; the outer side surface of the outer frame of the structural surface lower disc shearing box is provided with four lifting lugs, and the interior of the outer frame is a structural surface lower disc sample placement area; four lifting threaded holes are formed in the top of the periphery of the outer frame of the structural surface hanging disc shearing box, and the interior of the structural surface hanging disc shearing box is a structural surface hanging disc sample placing area; the bottom plate of the structural surface hanging wall shear box is provided with a shear box limiting threaded hole, the upper part of the standard unit limiting block is provided with a standard limiting unit handle, the standard unit limiting block is installed and disassembled by carrying the standard limiting unit handle by hand, and the bottom part of the standard unit limiting block is provided with a standard limiting unit threaded hole which is used for being connected with upper shearing;
the combination mode and the position of the standard limiting units of the upper disc shearing box and the lower disc shearing box are the same.
Furthermore, four lifting lugs are arranged on the outer side surface of the outer frame of the lower disc shearing box, a structural surface lower disc sample placing area is arranged in the lower disc shearing box, the lifting lugs are used for connecting a lifting sleeve ring and a lifting sleeve ring bolt, and the structural surface lower disc sample placing area is used for placing a standard unit limiting unit and a structural surface lower disc sample; the lifting lugs are arranged on the four sides of the outer frame of the lower disc shearing box, so that the lower disc shearing box is conveniently connected with the lifting lantern ring, and the lifting process of the lower disc shearing box is realized; the lifting lantern ring is connected with the lower disc shearing box through a lantern ring bolt, so that the lower disc shearing box can be lifted conveniently; the lantern ring bolt is connected with the hoisting lantern ring, so that the hoisting lantern ring is connected with the hoisting lug of the lower disc shearing box, and the hoisting lug is used for hoisting the lower disc shearing box.
Furthermore, four lifting threaded holes are formed in the top of the periphery of the outer frame of the hanging wall shearing box, limiting threaded holes are formed in the bottom of the outer frame, and a structural surface hanging wall sample placing area is formed inside the hanging wall shearing box and used for placing a standard unit limiting block and a structural surface hanging wall sample; the lifting ring threaded holes are formed in the peripheral apex angles of the outer frame of the upper disc shearing box, so that the upper disc shearing box is conveniently connected with the lifting rings, and the lifting process of the upper disc shearing box is realized; the lifting ring is used for connecting the lifting ring with the upper disc shearing box, so that the lower disc shearing box can be conveniently lifted; the standard unit limiting block is 50mm multiplied by 130mm in size, and the upper portion and the bottom portion are respectively provided with a standard limiting unit handle and a standard limiting unit threaded hole for combination of series sizes in the shearing box, so that the standard unit limiting block is suitable for indoor direct shearing tests of series size structural surface samples.
The upper plate shearing box standard limiting unit threaded hole is formed in the bottom of the limiting block, and the limiting block is fixed with the upper plate shearing box through the limiting block fixing bolt and the standard limiting unit threaded hole; and the standard unit fixing bolt is used for fixing the standard unit limiting block and the outer frame of the upper shearing box.
Although only one shearing box is provided, the structural surface sample direct shearing test of series sizes can be realized, the direct shearing test of the structural surface sample of series sizes can be met, and the structural surface shearing box has the characteristics of good testing effect, convenience in operation, short construction period, low manufacturing cost, small occupied space and the like.
The invention has the following beneficial effects: (1) can cut a series of samples with integral multiple sizes. The invention provides a shearing box which can carry out series integral multiple structural surface direct shearing test on the same shearing box by adjusting the number and the position of limiting units, thereby realizing the shearing of series integral multiple structural surface samples only in one shearing box. (2) The limiting unit block is a standardized test piece, is easy to install and has a short period. The inside spacing unit size of shearing box, appearance are the same, and a small amount of spacing unit that lacks the accessible adjustment non-shearing direction also can satisfy experimental requirement, arranges in full hall with the structural plane contact side in the shearing direction simultaneously, can guarantee to shear the stability of box in-process structural plane, makes the measured data more accurate. (3) The operation is simple, and the time is saved. The shear box can be placed on the direct shear apparatus through the lifting device, the defect that the traditional shear box needs to be manually transported to the direct shear apparatus is overcome, and a large amount of time is saved compared with the traditional shear box.
Drawings
Fig. 1 is an overall plan view of the shear box.
Fig. 2 is a top view of the bottom wall shear box.
Fig. 3 is a three-dimensional view of the outer frame of the lower disc shear box.
Figure 4 is a top plan view of the upper disc shear box.
Fig. 5 is a three-dimensional view of the outer frame of the upper disc shear box.
Fig. 6 is a three-view of a standard cell stop.
FIG. 7 is a schematic view of a standard cell securing latch.
Fig. 8 is a schematic view of a lifting ring.
Figure 9 is a schematic view of a lifting collar and lifting collar bolt.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 9, an assembling method of an assembled multi-size structural plane shear box based on standard unit limiting blocks includes the following steps:
1) selecting the size of a test structural surface sample: selecting a corresponding structural surface sample according to a test design scheme, formulating a combination scheme of a standard limiting unit, and carrying out a direct shear test through the following sample loading process.
2) The number of standard unit limiting blocks in the upper and lower disc shearing boxes is selected: in order to effectively fix the structural surface samples in the upper and lower shearing boxes, the number of standard unit limiting blocks in the upper and lower shearing boxes is required to be selected according to the size of the structural surface samples.
3) Connecting the hoisting lantern ring 6: the hoisting sleeve is connected with the hoisting lug 101 through the hoisting sleeve ring bolt 7, so that the hoisting sleeve ring 6 is connected with the lower shear box outer frame 2 to prepare for the next hoisting process of the lower shear box N.
4) Lifting a lower disc shearing box N: after the hoisting preparation work is finished, the lower disc shearing box N is connected with a hoisting instrument through the hoisting lantern ring 6, and the lower disc shearing box N is hoisted to the containing area of the direct shear shearing box.
5) And (3) assembling a lower shear box standard unit limiting block: and combining the standard unit limiting blocks 3 according to the size of the lower disc structural surface, so that the structural surface lower disc sample B can be stably fixed in the lower disc shearing box N.
6) Placing a structural surface lower disc sample B: and placing the structural surface bottom sample B in the structural surface bottom sample containing area 102 in the lower shear box outer frame 2 after the assembly in the step 5).
7) Placing a disc sample A on the structural surface: and placing the upper disc sample A on the lower disc sample B of the structural surface, and requiring the upper disc sample and the lower disc sample to be matched.
8) Shear box standard cell stopper 3 in the equipment: the shearing box is laterally placed on the ground, the combination of the standard unit limiting blocks 3 is carried out according to the size of the structural surface lower disc sample B, the standard unit limiting blocks 3 are fixed on the upper disc shearing box outer frame 2 one by using the standard limiting unit fixing bolts 4, and the standard unit limiting blocks 3 are prevented from being loosened and separated from the upper disc shearing box outer frame 2.
9) Installing a hoisting ring 5: after the limiting blocks are assembled, the hoisting rings 5 are respectively screwed into the hoisting threaded holes 201 in the bottom of the upper disc shearing box M, so that preparation is made for the subsequent hoisting process of the upper disc shearing box M.
10) Lifting an upper disc shear box M: and when the upper disc shearing box M is lifted to the upper part of the lower disc shearing box N, aligning the upper disc shearing box M with the upper disc sample A on the structural surface, and placing the lower disc shearing box N after the upper disc shearing box M and the structural surface are completely embedded.
11) A direct shear test was performed: after the above-mentioned assembling process is completed, the direct shear test can be implemented.
12) Disassembling the upper shearing box M: after the test is finished, the upper shear box M is lifted to the ground or the platform, and the standard limiting unit in the upper shear box M is reassembled according to the size requirement of the next group of structural plane samples.
13) Sampling: and taking out the structural surface lower disc sample B and the structural upper disc sample A after shearing failure from the structural surface lower disc sample B contained in the lower shearing box N in sequence.
14) Disassembling the lower shearing box N: and taking out the standard limiting unit 3 in the lower shear box, and reassembling the standard limiting unit 3 in the lower shear box according to the pattern size requirements of the next group of structural planes.
15) The next set of shear tests was performed, and the arrangement and testing of different specimen sizes was performed according to the procedure described above.
A standard unit limiting block-based assembled multi-size structural surface shearing box is disclosed, wherein A is a structural surface upper disc sample, B is a structural surface lower disc sample, C is a sample structural surface, N is a lower disc shearing box, and M is an upper disc shearing box, the method for manufacturing the standard unit limiting block-assembled multi-size structural surface lower disc shearing box comprises a lower disc shearing box N outer frame 1, a lifting lantern ring 6, a lifting lantern ring bolt 7 and a standard unit limiting block 3, the structural surface upper disc shearing box M comprises an upper disc shearing box outer frame 2, a standard unit fixing bolt 4, a lifting ring 5 and a standard unit limiting block 3, wherein the outer side surface of the structural surface lower disc shearing box outer frame 1 is provided with four lifting lugs 101, the inside is a structural surface lower disc sample B containing area 102, the bottom of the structural surface upper disc shearing box outer frame 2 is provided with four lifting threaded holes 201, and the inside is a structural surface upper disc sample A containing area 203, the bottom plate of the disc shearing box M on the structural surface is provided with a shearing box limiting threaded hole 202, the upper part of the standard single limiting block 3 is provided with a standard limiting unit handle 301, and the bottom part of the standard single limiting block is provided with a standard limiting unit threaded hole 302. Outer frame 1 of lower wall shearing box, 1 outer frame lateral surface of lower wall shearing box are equipped with four lugs 101, and inside holds district 102 for structural plane lower wall sample, lifts by crane the lug 101 and is used for connecting and lifts by crane lantern ring 6 and lifts by crane lantern ring bolt 7, and structural plane lower wall sample holds district 102 and is used for holding standard unit stopper 3 and structural plane lower wall sample B. The lifting lugs 101 are arranged on four sides of the outer frame 1 of the lower disc shearing box, so that the lower disc shearing box N is connected with the lifting lantern ring 6 conveniently, and the lifting process of the lower disc shearing box N is realized. The hoisting lantern ring 6 is connected with the upper disc shearing box M through a lantern ring bolt, so that the hoisting process of the lower disc shearing box N is facilitated. The lifting lantern ring bolt 7 is connected with the lifting lantern ring 6, so that the lifting lantern ring 6 is connected with the lifting lug 101 of the lower disc shearing box N, and the lifting lug is used for the lifting process of the lower disc shearing box N. The upper disc shearing box outer frame 2 is characterized in that four lifting threaded holes 201 are formed in the top of the upper disc shearing box outer frame 2, limiting threaded holes 202 are formed in the bottom of the upper disc shearing box outer frame 2, and a structural surface upper disc sample containing area 203 is formed inside the upper disc shearing box outer frame and used for containing a standard unit limiting block 3 and a structural surface upper disc sample A. The threaded holes of the lifting rings 5 are formed in the peripheral vertex angles of the outer frame 2 of the upper disc shearing box, so that the upper disc shearing box M is conveniently connected with the lifting rings 5, and the lifting process of the upper disc shearing box M is realized. The hoisting ring 5 is used for connecting the hoisting ring 5 with the lower disc shearing box N, so that the hoisting process of the lower disc shearing box N is facilitated. The standard unit limiting block 3 is 50mm multiplied by 130mm in size, and the upper portion and the bottom portion are respectively provided with a standard limiting unit handle 301 and a standard limiting unit threaded hole 302 for combination of series sizes in a shearing box, so that the standard unit limiting block is suitable for indoor direct shearing tests of series size structural surface samples. The standard limiting unit threaded hole 302 of the upper disc shearing box is formed in the bottom of the limiting block, so that the standard unit limiting block 3 is fixed with the outer frame 1 of the upper disc shearing box through the standard unit fixing bolt 4 and the standard limiting unit threaded hole 302, and the standard unit limiting block 3 and the upper disc shearing box M are prevented from falling off. And the standard unit fixing bolt 4 is used for fixing the standard unit limiting block 3 and the upper disc shearing box outer frame 1 and preventing the standard unit limiting block 3 from loosening and falling off. The assembling processes of the upper disc shearing box M and the lower disc shearing box N on the structural plane are mutually independent. The combination mode and the position of the upper disc shearing box M and the lower disc structural surface shearing box standard limit unit 3 on the structural surface are the same.
The maximum size of the upper disc shearing box and the lower disc shearing box in the example is the size of an inner frame, namely 600mm multiplied by 600mm, the height of the upper disc shearing box is 150, wherein 20mm is the thickness of an upper base plate, the thickness of the lower disc shearing box is 150mm, wherein 20mm is the thickness of a lower base plate, and the specific combination size is formulated according to a structural plane sample.
In this example, a sample cutting box of a sawtooth structure surface with the size of 300mm × 300mm × 300mm is selected.
The peripheral board of hanging wall shearing box is thick 30mm, and bottom plate thickness 20mm, and box internal border is 600mm, and the external border is 660mm, and the box internal height is 130mm, and the box external height is 150mm, and 10mm punishment apart from shearing box corner do not sets up 4 diameters and be 10mm rings screw hole, is equipped with 144 spacing screw holes in the box bottom of hanging wall shearing to 50 mm's interval distance evenly distributed is on whole hanging wall shearing box bottom plate.
The peripheral board of lower wall shearing box is thick 30mm, the bottom plate is 20mm thick, box inner border is 600mm, the outer border is 660mm, the box internal height is 130mm, the box external height is 150mm, 20mm punishment do not set up 4 lugs with perpendicular square edge from lower wall shearing box shear plane horizontal right-angle side, it distributes on the bilateral symmetry face to lift by crane the ear, with lower wall shearing box outer frame weld, through lifting by crane the lantern ring, the lantern ring bolt with lift by crane the ear and be connected, it lifts by crane to be convenient for the lower wall shearing box to large-scale staight scissors appearance on.
The size of the standard unit limiting block is 50mm multiplied by 130mm, and the bottom of the standard unit limiting block is provided with 1 standard limiting unit threaded hole with the diameter of 10 mm. The upper disc shearing box is fixed in a mode that an interval of 300mm multiplied by 300mm in the middle of the outer frame of the upper disc shearing box is reserved for placing a structural surface sample, the rest parts are fixed by a standard unit limiting block, the lower disc shearing box combination mode in the upper disc shearing box fixing mode is consistent with the upper disc shearing box combination mode, and a bottom limiting block fixing bolt is fixed to prevent falling.
The models of the limiting blocks of the upper and lower disc shearing boxes are the same, and the total number is 114; the lifting rings are the same in type and are 4 in total; the lower disc shearing box lifts by crane lantern ring 4 pairs, and the model is the same, 8 in total.
The structural surface direct shear apparatus is used for measuring the structural surface under different normal stresses to carry out a shear test, and obtaining parameters such as shear stress, shear deformation and the like when the structural surface is damaged.
The embodiment of the invention is as follows:
1) selecting the size of a test structural surface sample: and selecting a corresponding structural surface sample according to a test design scheme, and carrying out a direct shear test through the following sample loading process.
2) The number of standard unit limiting blocks in the upper and lower disc shearing boxes is selected: in order to effectively fix the structural surface samples in the upper and lower shearing boxes, the number of standard unit limiting blocks in the upper and lower shearing boxes is required to be selected according to the size of the structural surface samples.
3) Connecting the hoisting lantern ring 6: the hoisting sleeve is connected with the hoisting lug 101 through the hoisting sleeve ring bolt 7, so that the hoisting sleeve ring 6 is connected with the lower shear box outer frame 2 to prepare for the next hoisting process of the lower shear box N.
4) Lifting a lower disc shearing box N: after the hoisting preparation work is finished, the lower disc shearing box N is connected with a hoisting instrument through the hoisting lantern ring 6, and the lower disc shearing box N is hoisted to the containing area of the direct shear shearing box.
5) And (3) assembling a lower shear box standard unit limiting block: and combining the standard unit limiting blocks 3 according to the size of the lower disc structural surface, so that the structural surface lower disc sample B can be stably fixed in the lower disc shearing box N.
6) Placing a structural surface lower disc sample B: and placing the structural surface bottom sample B in the structural surface bottom sample containing area 102 in the lower shear box outer frame 2 after the assembly in the step 5).
7) Placing a disc sample A on the structural surface: and placing the upper disc sample A on the lower disc sample B of the structural surface, and requiring the upper disc sample and the lower disc sample to be matched.
8) Shear box standard cell stopper 3 in the equipment: the shearing box is laterally placed on the ground, the combination of the standard unit limiting blocks 3 is carried out according to the size of the structural surface lower disc sample B, the standard unit limiting blocks 3 are fixed on the upper disc shearing box outer frame 2 one by using the standard limiting unit fixing bolts 4, and the standard unit limiting blocks 3 are prevented from being loosened and separated from the upper disc shearing box outer frame 2.
9) Installing a hoisting ring 5: after the limiting blocks are assembled, the hoisting rings 5 are respectively screwed into the hoisting threaded holes 201 in the bottom of the upper disc shearing box M, so that preparation is made for the subsequent hoisting process of the upper disc shearing box M.
10) Lifting an upper disc shear box M: and when the upper disc shearing box M is lifted to the upper part of the lower disc shearing box N, aligning the upper disc shearing box M with the upper disc sample A on the structural surface, and placing the lower disc shearing box N after the upper disc shearing box M and the structural surface are completely embedded.
11) A direct shear test was performed: after the above-mentioned assembling process is completed, the direct shear test can be implemented.
12) Disassembling the upper shearing box M: after the test is finished, the upper shear box M is lifted to the ground or the platform, and the standard limiting unit in the upper shear box M is reassembled according to the size requirement of the next group of structural plane samples.
13) Sampling: and taking out the structural surface lower disc sample B and the structural upper disc sample A after shearing failure from the structural surface lower disc sample B contained in the lower shearing box N in sequence.
14) Disassembling the lower shearing box N: and taking out the standard limiting unit 3 in the lower shear box, and reassembling the standard limiting unit 3 in the lower shear box according to the pattern size requirements of the next group of structural planes.
15) The next set of shear tests was performed, and the arrangement and testing of different specimen sizes was performed according to the procedure described above.
Claims (5)
1. A method for assembling a multi-size structural plane shear box based on standard unit limiting blocks is characterized by comprising the following steps:
1) selecting the size of a test structural surface sample; selecting a corresponding structural surface sample according to an experimental design scheme;
2) the number of standard unit limiting blocks in the upper and lower disc shearing boxes is selected: in order to effectively fix the structural surface samples in the upper and lower shearing boxes, the number of standard unit limiting blocks in the upper and lower shearing boxes is selected according to the size of the structural surface samples;
3) connecting a hoisting lantern ring: connecting the lifting sleeve with the lifting lug through the lifting sleeve ring bolt, so that the lifting sleeve ring is connected with the outer frame of the lower shear box, and preparing for the next lifting process of the lower shear box;
4) lifting a lower disc shearing box: after the lifting preparation work is finished, the lower disc shearing box is connected with a lifting appliance through a lifting lantern ring, and the lower disc shearing box is lifted to the internal test platform of the direct shear apparatus;
5) assembling a lower shear box standard unit limiting block: according to the size of the lower disc structure surface, a standard unit limiting block is combined, so that the lower disc sample of the structure surface can be stably fixed in the shearing box;
6) placing a structural surface bottom plate sample: placing the structural surface bottom sample in the structural surface bottom sample holding area inside the outer frame of the lower shear box after the assembly in the step 5);
7) placing the disc sample on the structural surface: placing a structural surface upper disc sample on a structural surface lower disc sample, and requiring the upper disc and the lower disc structural surface samples to be matched;
8) assembling a standard unit limiting block of the upper shearing box: the shearing box is laterally placed on the ground, standard unit limiting blocks are combined according to the size of a test sample on the lower disc surface of the structure, and the standard unit limiting blocks are fixed on the outer frame of the upper disc shearing box one by using standard unit limiting fixing bolts, so that the standard unit limiting blocks are prevented from being loosened and separated from the outer frame of the upper disc shearing box;
9) installing a hoisting ring: after the limiting blocks are assembled, the hoisting rings are respectively screwed into the hoisting threaded holes at the bottom of the upper disc shearing box, so that preparation is made for the subsequent hoisting process of the upper disc shearing box;
10) lifting an upper disc shearing box: when the upper disc shearing box is lifted above the lower disc shearing box, the upper disc shearing box and the structural surface upper disc sample are aligned, and the lower disc shearing box is placed after the upper disc shearing box and the structural surface upper disc sample are completely embedded;
11) after the above-mentioned assembling process is completed, the direct shearing test can be implemented,
the assembled multi-size structural plane shearing box assembled based on the standard unit limiting blocks in the step 11) comprises an upper disc shearing box and a lower disc shearing box,
the lower disc shearing box consists of an outer frame of the lower disc shearing box, a lifting lantern ring, a lantern ring bolt and a standard unit limiting block, and the upper disc shearing box consists of an outer frame of the upper disc shearing box, a standard unit fixing bolt, a lifting ring and a standard unit limiting block; the outer side surface of the outer frame of the structural surface lower disc shearing box is provided with four lifting lugs, and the interior of the outer frame is a structural surface lower disc sample placement area; four lifting threaded holes are formed in the top of the periphery of the outer frame of the structural surface hanging disc shearing box, and the interior of the structural surface hanging disc shearing box is a structural surface hanging disc sample placing area; the bottom plate of the structural surface hanging wall shear box is provided with a shear box limiting threaded hole, the upper part of the standard unit limiting block is provided with a standard limiting unit handle, the standard unit limiting block is installed and disassembled by carrying the standard limiting unit handle by hand, and the bottom part of the standard unit limiting block is provided with a standard limiting unit threaded hole which is used for being connected with upper shearing;
the combination mode and the position of the standard limiting units of the upper disc shearing box and the lower disc shearing box are the same.
2. The assembly method of the modular unit-limited-block-based multi-dimensional structural plane shear box according to claim 1, further comprising the steps of:
12) disassembling the upper shearing box: after the test is finished, hoisting the upper shear box to the ground or a platform, and reassembling a standard limiting unit in the upper shear box according to the size requirement of the next group of structural surface samples;
13) sampling: taking out the structural surface lower disc sample and the structural upper disc sample after shearing failure in the lower shearing box in sequence;
14) disassembling the lower shearing box: taking out the standard limiting unit in the lower shearing box, and reassembling the standard limiting unit in the lower shearing box according to the pattern size requirements of the next group of structural surfaces;
15) the next set of shear tests was performed, and the arrangement and testing of different specimen sizes was performed according to the procedure described above.
3. The assembling method of the modular unit-limited block-based assembled multi-dimensional structural plane shear box according to claim 1 or 2, wherein: the outer side surface of the outer framework of the lower disc shearing box is provided with four lifting lugs, the inner part of the outer framework of the lower disc shearing box is a structural surface lower disc sample placing area, the lifting lugs are used for connecting a lifting sleeve ring and a lifting sleeve ring bolt, and the structural surface lower disc sample placing area is used for placing a standard unit limiting unit and a structural surface lower disc sample; the lifting lugs are arranged on the four sides of the outer frame of the lower disc shearing box, so that the lower disc shearing box is conveniently connected with the lifting lantern ring, and the lifting process of the lower disc shearing box is realized; the lifting lantern ring is connected with the lower disc shearing box through a lantern ring bolt, so that the lower disc shearing box can be lifted conveniently; the lantern ring bolt is connected with the hoisting lantern ring, so that the hoisting lantern ring is connected with the hoisting lug of the lower disc shearing box, and the hoisting lug is used for hoisting the lower disc shearing box.
4. The assembling method of the modular unit-limited block-based assembled multi-dimensional structural plane shear box according to claim 1 or 2, wherein: four lifting threaded holes are formed in the top of the periphery of the outer frame of the hanging wall shearing box, limiting threaded holes are formed in the bottom of the outer frame of the hanging wall shearing box, and a structural surface hanging wall sample placing area is formed inside the hanging wall shearing box and used for placing a standard unit limiting block and a structural surface hanging wall sample; the lifting ring threaded holes are formed in the peripheral apex angles of the outer frame of the upper disc shearing box, so that the upper disc shearing box is conveniently connected with the lifting rings, and the lifting process of the upper disc shearing box is realized; the lifting ring is used for connecting the lifting ring with the upper disc shearing box, so that the lower disc shearing box can be conveniently lifted; the standard unit limiting block is 50mm multiplied by 130mm in size, and the upper portion and the bottom portion are respectively provided with a standard limiting unit handle and a standard limiting unit threaded hole for combination of series sizes in the shearing box, so that the standard unit limiting block is suitable for indoor direct shearing tests of series size structural surface samples.
5. The assembling method of the modular unit-limited block-based assembled multi-dimensional structural plane shear box according to claim 1 or 2, wherein: the upper plate shearing box standard limiting unit threaded hole is formed in the bottom of the limiting block, and the limiting block is fixed with the upper plate shearing box through the limiting block fixing bolt and the standard limiting unit threaded hole; and the standard unit fixing bolt is used for fixing the standard unit limiting block and the outer frame of the upper shearing box.
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