CN110887722B - Method for manufacturing structural surface shear strength size effect sample mold based on large number decomposition algorithm - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 23
- 230000005476 size effect Effects 0.000 title claims abstract description 20
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- 239000011159 matrix material Substances 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims abstract description 14
- 239000011435 rock Substances 0.000 claims abstract description 10
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- XDDAORKBJWWYJS-UHFFFAOYSA-N glyphosate Chemical compound OC(=O)CNCP(O)(O)=O XDDAORKBJWWYJS-UHFFFAOYSA-N 0.000 claims description 22
- 238000005266 casting Methods 0.000 claims description 9
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
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- 230000001186 cumulative effect Effects 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
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- G01N1/36—Embedding or analogous mounting of samples
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Abstract
A method for manufacturing a structural surface shear strength size effect sample mold based on a large number decomposition algorithm comprises the following steps: (1) Obtaining series sizes of plate concrete samples on the structural surface according to the test requirements of the research on the size effect of the shear strength of the rock structural surface to form a length matrix; (2) selecting a form of a pouring mold according to the length of the sample; (3) Adopting a clapboard type mould to pour samples with the lengths belonging to the matrix simultaneously; (4) Adopting a splicing type mould to pour a sample with the length belonging to the matrix; (5) Designing the length of a middle and a small side plates of the spliced side plates to form a length matrix; (6) decomposing the algorithm according to the large number; (7) Obtaining the total required number of each small side plate, and manufacturing the small side plates; (8) And inserting the partition plates into the slots, and splicing the side plates to obtain the partition plate type mold and the splicing type mold for pouring the concrete samples of the structural surfaces with the series of sizes. The invention can improve the utilization rate of the small side plate, reduce the vacancy rate of the die and improve the sample manufacturing efficiency by utilizing the small side plate for many times during pouring.
Description
Technical Field
The invention relates to a method for manufacturing a structural plane shear strength size effect sample mold based on a large number decomposition algorithm, and belongs to the technical field of indoor physical mechanical tests.
Background
In recent years, with the rapid development of economy in China, some large-scale construction projects related to nationwide nationalities, such as large-scale hydropower engineering in the middle and western regions, highways and highways, deep resource exploitation, strategic oil reserve, nuclear power engineering and the like, are implemented successively, the problems of stability and catastrophe of rock masses in engineering areas are quite prominent, and particularly landslide geological disasters of side slopes of large-scale open mines, water conservancy and the like can seriously affect production, and can seriously cause casualties and major loss of equipment and mineral resources. A large number of literature researches show that the root cause of large-scale side slope geological disasters is that the whole instability of the overlying rock mass is caused by the slippage of a hard structural surface in the large-scale side slope under the action of a certain load, and whether the slippage of the structural surface is caused is determined by the shear strength of the structural surface. However, for a large open-air side slope, the size of the key structural plane of the total side slope and the combined step side slope reaches tens of meters or even hundreds of meters, and due to the existence of the structural plane shear strength size effect, the shear strength index error of the structural plane obtained by the traditional small indoor shear test is large, so that a self-developed rock structural plane size effect test system is adopted to carry out a series of size rigid structural plane shear tests, and it is very necessary to explore the size effect rule of the structural plane shear strength. However, when the structural surface concrete sample is poured, the following problems still exist: (1) When a series of size hard structural surface shear test researches are carried out, due to the fact that the space of a testing machine is large, too many backing plates need to be added when a small-size sample is adopted, the loading force estimation is inaccurate, and potential safety hazards exist due to too many backing plates; (2) The structural surface concrete sample size is too much, and the mould that needs is too much, and sample shaping time is longer, and it is great to lead to the mould to put area, and the mould utilization ratio is not high, mould cost of manufacture greatly increased. Therefore, the design of the series-size structural surface concrete sample pouring mold based on a large number decomposition algorithm by using a method of combining the partition boards and splicing is very necessary.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the method for manufacturing the structural plane shear strength size effect sample mold based on the large number decomposition algorithm, which can avoid the waste of steel materials and space caused by excessive series size structural plane concrete sample casting molds and the problem of insufficient splicing space caused by undersize samples, can improve the utilization rate of small side plates, reduce the vacancy rate of molds and improve the sample manufacturing efficiency by repeatedly utilizing the concrete sample casting mold during casting, can ensure the precision of the sample size while reducing the sample manufacturing cost, improves the accuracy and the scientificity of test results, and provides scientific basis for the design of series size rock mass structural plane shear tests.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for manufacturing a structural plane shear strength size effect sample mold based on a large number decomposition algorithm comprises the following steps:
(1) According to the test requirement of the rock mass structural surface shear strength size effect research, the series sizes of the plate concrete samples on the structural surface are obtained to form a length matrix L, and the minimum length in the matrix is L min Maximum length of L max The length is in accordance with the arithmetic progression as follows,
L i ＝L 0 +i×ΔL
in the formula, L i Is the series length, cm, of the ith sample; l is a radical of an alcohol 0 Is the minimum length of the sample, cm; delta L is the interval of the length of the sample series, cm;
(2) Selecting a parameter L k ＝roundup(L max /10), mixing L min ～L k The lengths within the range constitute the matrix L Partition Is prepared by mixing L k ～L max The lengths within the range constitute the matrix L Splicing device Selecting a form of a pouring mold according to the length of the sample, as follows;
L k ＝roundup(L max /10)
(3) Adopt baffle formula mould to pour length simultaneously and belong to matrix L Partition wall The clapboard type mould comprises a long side plate, baffle plates at two ends and an inserting plate; the plates are positioned and fixed by adopting bolts and nuts;
(4) The length of the poured matrix L is formed by adopting a splicing type mould Splicing device The splicing type mould comprises a splicing side plate and two end baffles(ii) a The spliced side plates and the baffles at the two ends are positioned and fixed by adopting bolts and nuts; the two splicing side plates are connected with the backup plate by adopting bolts and nuts for positioning and fixing;
(5) The lengths of the small side plates in the spliced side plates are designed to form a length matrix D Splicing device Including 4 lengths, each L k 、L k +ΔL、L k +2ΔL、roundup(L max /4), wherein the roundup function is consistent with step (2);
(6) According to the large number decomposition algorithm, the processing steps are as follows:
(1) by addition, the matrix L is divided into Splicing device Decomposition of medium and large numbers into matrix D Splicing device Accumulating the medium and small numbers, wherein the accumulation times do not exceed 4 times, and the same small number can be repeatedly accumulated;
(2) analyzing a decimal combination form of the large number after one-time decomposition, and counting the cumulative times of each decimal after all the large numbers are decomposed;
(3) repeating the step (2) for corresponding times according to the number of samples with each length required by the test, and counting the cumulative times (N) of each decimal 1 ，N 2 ，N 3 ，N 4 ) Obtaining the required number of each small side plate in the splicing mould;
(7) Repeating the steps (1) to (6) aiming at the pouring structure surface bottom plate concrete sample, so as to obtain the number of each small side plate required by the pouring structure surface bottom plate concrete sample, adding the number of the small side plates required by the structure surface top plate concrete sample in the step (6), so as to obtain the total required number of each small side plate, and manufacturing the small side plates;
(8) And inserting the inserting plate into the inserting groove according to the size of the structural surface concrete sample, and splicing the side plates to obtain a partition plate type mold and a splicing type mold for pouring the structural surface concrete samples with series sizes.
Further, in the step (1), the structural surface concrete sample is cuboid concrete, the sizes of the upper plate and the lower plate are the same, the heights and the widths of the series-size concrete are kept unchanged, only the lengths are changed, and the minimum length is L min Not less than 10cm and maximum length of L max ≥500cm。
Still further, in the step (2), the roundup function means rounding up until the length coincides with a certain value in the matrix L.
In the steps (2) and (3), a Q235 steel plate is adopted as a mold manufacturing material, antirust paint is sprayed on the surface of the mold manufacturing material, and a welding processing technology is adopted.
In the step (8), the sample casting molds with the same size have different splicing forms, and the same side plate can be used for splicing the sample casting molds with various sizes.
Preferably, in the step (5), the lengths of the small side plates in the side plates to be spliced are designed to form a length matrix D Splicing device Including 5 lengths, each L k 、L k +ΔL、L k +2ΔL、L k +5ΔL、 roundup(L max /4) at this time, in step (6) (3), the number of times (N) is accumulated 1 ’，N 2 ’，N 3 ’，N 4 ’，N 5 ’)。
Preferably, in the step (5), the lengths of the small side plates in the side plates to be spliced are designed to form a length matrix D Splicing device Including 6 lengths, each L k 、L k +ΔL、L k +2ΔL、L k +5ΔL、L k +10ΔL、 roundup(L max /4) at this time, in step (6) (3), the number of times (N) is accumulated 1 ”， N 2 ”， N 3 ”， N 4 ”， N 5 ”， N 6 ” )。
The invention has the following beneficial effects: the splicing type mould can be used for simultaneously pouring structural surface concrete samples with a plurality of sizes, small side plates with various sizes can be fully utilized, steel material and space waste caused by excessive pouring moulds of the structural surface concrete samples with series sizes can be avoided, the problem of insufficient splicing space caused by undersize of the samples can be solved, the utilization rate of the small side plates can be improved by multiple utilization during pouring, the vacancy rate of the moulds is reduced, the sample manufacturing efficiency is improved, the sample size precision is ensured while the sample manufacturing cost is reduced, the accuracy and the scientificity of test results are improved, and scientific basis is provided for the design of a shearing test of the structural surface of the rock mass with series sizes; the method has important significance for reducing investment, reducing production cost and ensuring mining safety of large-scale open-pit mines.
Drawings
FIG. 1 is a schematic view of the baffled mold of the present invention, wherein 1-two end baffles; 2-long side plate; 3-a separator; 4-reinforcing steel bars; 5, inserting a slot;
FIG. 2 is a schematic view of the split mold of the present invention, wherein 21-two end stops; 22-small side plate; 23-a plate rib; and 24, splicing the small side plates with the backup plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a method for manufacturing a structural plane shear strength size effect sample mold based on a majority decomposition algorithm comprises the following steps:
(1) According to the test requirement of the rock mass structural surface shear strength size effect research, the series sizes of the plate concrete samples on the structural surface are obtained to form a length matrix L, and the minimum length in the matrix is L min Maximum length of L max The length is in accordance with the arithmetic progression as follows,
L i ＝L 0 +i×ΔL
in the formula, L i Is the series length, cm, of the ith sample; l is 0 Is the minimum length of the sample, cm; delta L is the interval of the length of the sample series, cm;
(2) Selecting a parameter L k ＝roundup(L max /10), mixing L min ～L k The lengths within the range constitute the matrix L Partition wall Is prepared by mixing L k ～L max The lengths within the range constitute the matrix L Splicing device Selecting a form of a pouring mold according to the length of the sample, as follows;
L k ＝roundup(L max /10)
(3) Adopt baffle formula mould to pour length simultaneously and belong to matrix L Partition The design form of the sample is shown in figure 1, and the sample mainly comprises a long side plate, two end baffles and an inserting plate; wherein, the long side plateThe thickness of the surface is 10mm, the width of the plate rib is 40mm, the thickness of the plate rib is 10mm, the protruding thickness of the slot is 30mm, and the total thickness of the long side plates is 50mm; the thickness of the plate surfaces of the baffles at the two ends is 10mm, the width of the plate rib is 40mm, the thickness of the plate rib is 10mm, and the total thickness of the baffles at the two ends is 50mm; the partition plate is of a hollow structure with internal cross-shaped plate ribs, is ground flat by a milling machine, has the total thickness of 20mm, and has the width of a partition plate slot of 22mm; the plates are positioned and fixed by adopting bolts and nuts;
(4) The length of the cast product is determined by the splicing type die Splicing device The design form of the sample is shown in figure 2, and the sample mainly comprises a splicing side plate and two end baffles; the splicing side plates and the baffle plates at the two ends are the same as those in the step (3), and the difference is that the two splicing side plates are connected with the backup plate by adopting bolts and nuts for positioning and fixing;
(5) The lengths of the small side plates in the spliced side plates are designed to form a length matrix D Splicing device Comprises 4 to 6 lengths, respectively L k 、L k +ΔL、L k +2ΔL、L k +5ΔL、L k +10ΔL、roundup(L max /4), wherein the roundup function is consistent with step (2);
(6) According to a large number decomposition algorithm, an MATLAB software programming program 'Size-mould' is adopted, and the processing steps are as follows:
(1) by addition, the matrix L is divided into Splicing device Decomposition of medium and large numbers into matrix D Splicing device The accumulation times of the medium and small numbers do not exceed 4 times, and the same small number can be repeatedly accumulated,
(2) analyzing the decimal combination form of the major figures after one-time decomposition, counting the accumulated times of each decimal after all major figures are decomposed,
(3) repeating the step (2) for corresponding times according to the number of the samples with various lengths required by the test, and counting the accumulated times of the occurrence of various fractions to obtain the required number of various small side plates in the splicing die;
(7) Repeating the steps (1) to (6) aiming at the pouring structural surface bottom plate concrete sample to obtain the number of each small side plate required by the pouring structural surface bottom plate concrete sample, adding the number of the small side plates required by the structural surface top plate concrete sample in the step (6) to obtain the total required number of each small side plate, and manufacturing the small side plates;
(8) And inserting the inserting plate into the inserting slot according to the size of the structural surface concrete sample, and splicing the side plates to obtain the partition plate type mold and the splicing type mold for pouring the structural surface concrete samples with series sizes.
Further, in the step (1), the structural surface concrete sample is cuboid concrete, the sizes of the upper plate and the lower plate are the same, the heights and the widths of the series-size concrete are kept unchanged, only the length is changed, and the minimum length is L min Not less than 10cm and maximum length of L max ≥500cm。
Still further, in the step (2), the roundup function means rounding up until the length coincides with a certain value in the matrix L.
In the steps (2) and (3), a Q235 steel plate is adopted as a mold manufacturing material, antirust paint is sprayed on the surface of the mold manufacturing material, and a welding processing technology is adopted.
In the step (8), the sample casting molds with the same size have different splicing forms, and the same side plate can be used for splicing the sample casting molds with various sizes.
In the step (5), the length matrix D Splicing device Comprises 4 lengths, L respectively k 、L k +ΔL、L k +2ΔL、 roundup(L max /4), in this case, in step (6) (3), the number of times (N) is accumulated 1 ，N 2 ，N 3 ，N 4 )。
Or the following steps: length matrix D Splicing device Comprises 5 lengths of L k 、L k +ΔL、L k +2ΔL、 L k +5ΔL、roundup(L max /4) at this time, in step (6) (3), the number of times (N) is accumulated 1 ，N 2 ，N 3 ， N 4 ，N 5 )。
Or the following steps: length matrix D Splicing device Comprises 6 lengths of L k 、L k +ΔL、L k +2ΔL、 L k +5ΔL、L k +10ΔL、roundup(L max /4) at this time, in step (6) (3), the number of times (N) is accumulated 1 ， N 2 ，N 3 ，N 4 ，N 5 ，N 6 )。
According to the method, the structural face concrete samples with multiple sizes can be poured simultaneously through the splicing type mold, small side plates with various sizes can be fully utilized, steel material and space waste caused by excessive pouring molds of the structural face concrete samples with serial sizes can be avoided, the problem of insufficient splicing space caused by undersize of the samples can be solved, the utilization rate of the small side plates can be improved through multiple utilization during pouring, the vacancy rate of the molds is reduced, the sample manufacturing efficiency is improved, the sample manufacturing cost is reduced, the precision of the sample size is guaranteed, the accuracy and the scientificity of test results are improved, and scientific bases are provided for the design of the shear test of the structural face of the rock mass with serial sizes; the method has important significance for reducing investment, reducing production cost and ensuring mining safety of large-scale open-pit mines.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, which are intended for purposes of illustration only. The scope of the present invention should not be construed as being limited to the particular forms set forth in the examples, but rather as being defined by the claims and the equivalents thereof which can occur to those skilled in the art upon consideration of the present inventive concept.
Claims (6)
1. A method for manufacturing a structural plane shear strength size effect sample mold based on a large number decomposition algorithm is characterized by comprising the following steps:
(1) According to the test requirement of the rock mass structural surface shear strength size effect research, the series sizes of the plate concrete samples on the structural surface are obtained to form a length matrix L, and the minimum length in the matrix is L min Maximum length of L max The length is in accordance with the arithmetic progression as follows,
L i ＝L 0 +i×ΔL
in the formula, L i Is the series length, cm, of the ith sample; l is a radical of an alcohol 0 Is the minimum length of the sample, cm; delta L is the interval of the lengths of the sample series, cm;
(2) Selecting a parameter L k ＝roundup(L max /10), mixing L min ～L k The lengths within the range constitute the matrix L Partition wall From L to L k ～L max The lengths within the range constitute the matrix L Splicing device Selecting a form of a pouring mold according to the length of the sample, as follows;
L k ＝roundup(L max /10)
the roundup function means rounding up until the length coincides with a certain value in the matrix L;
(3) The length of pouring simultaneously by adopting the clapboard type mould belongs to the matrix L Partition The clapboard type mould comprises a long side plate, two end baffles and an inserting plate; the plates are positioned and fixed by adopting bolts and nuts;
(4) The length of the poured matrix L is formed by adopting a splicing type mould Splicing device The spliced mould comprises a spliced side plate and two end baffles; the spliced side plates and the baffles at the two ends are positioned and fixed by adopting bolts and nuts; the two spliced side plates are connected with the backup plate by adopting bolts and nuts for positioning and fixing;
(5) The lengths of the small side plates in the spliced side plates are designed to form a length matrix D Splicing device Including 4 lengths, each L k 、L k +ΔL、L k +2ΔL、roundup(L max /4), wherein the roundup function is consistent with step (2);
(6) According to the large number decomposition algorithm, the processing steps are as follows:
(1) by addition, the matrix L is divided into Splicing device Decomposition of medium and large numbers into matrix D Splicing device Accumulating the medium and small numbers, wherein the accumulation times do not exceed 4 times, and the same small number can be repeatedly accumulated;
(2) analyzing a decimal combination form of the large number after one-time decomposition, and counting the cumulative times of each decimal after all the large numbers are decomposed;
(3) repeating the step (2) for corresponding times according to the number of the samples with each length required by the test, and counting the cumulative times N of each decimal 1 ，N 2 ，N 3 ，N 4 That is, the required number of each small side plate in the splicing mould is obtainedCounting;
(7) Repeating the steps (1) to (6) aiming at the concrete sample of the lower disc of the pouring structural surface to obtain the number of each small side plate required by the concrete sample of the lower disc of the pouring structural surface, adding the number of the small side plates required by the concrete sample of the upper disc of the structural surface in the step (6) to obtain the total required number of each small side plate, and manufacturing the small side plates;
(8) And inserting the inserting plate into the inserting groove according to the size of the structural surface concrete sample, and splicing the side plates to obtain a partition plate type mold and a splicing type mold for pouring the structural surface concrete samples with series sizes.
2. The method for manufacturing the structural surface shear strength size effect sample mold based on the majority decomposition algorithm according to claim 1, wherein in the step (1), the structural surface concrete sample refers to cuboid concrete, the sizes of the upper and lower discs are the same, the heights and the widths of series-size concrete are all kept unchanged, only refer to length change, and the minimum length is L min Not less than 10cm and maximum length of L max ≥500cm。
3. The method for manufacturing the structural surface shear strength size effect test sample mold based on the majority decomposition algorithm according to claim 1 or 2, wherein in the steps (2) and (3), the mold manufacturing material is a Q235 steel plate, the surface is sprayed with antirust paint, and a welding processing technology is adopted.
4. The method for manufacturing structural surface shear strength size effect sample molds based on the majority decomposition algorithm according to claim 1 or 2, wherein in the step (8), sample casting molds of the same size have different splicing forms, and the same side plate can be used for splicing sample casting molds of multiple sizes.
5. The method for manufacturing structural surface shear strength size effect sample mold based on majority decomposition algorithm as claimed in claim 1 or 2, wherein in the step (5), the lengths of the small side plates in the spliced side plates are designed to form a length matrix D Splicing device Including 5 lengths, each L k 、L k +ΔL、L k +2ΔL、L k +5ΔL、roundup(L max /4) in this case, in step (6) (3), the number of times N is accumulated 1 ’，N 2 ’，N 3 ’，N 4 ’，N 5 ’。
6. The method for manufacturing structural face shear strength size effect specimen mold based on majority decomposition algorithm as claimed in claim 5, wherein in the step (5), the lengths of the small and medium side plates in the spliced side plates are designed to form a length matrix D Splicing device Including 6 lengths, each L k 、L k +ΔL、L k +2ΔL、L k +5ΔL、L k +10ΔL、roundup(L max /4) in this case, in step (6) (3), the number of times N is accumulated 1 ”，N 2 ”，N 3 ”，N 4 ”，N 5 ”，N 6 ”。
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