CN105509934A - Method for measuring expansion cement slurry expansion pressure stress - Google Patents
Method for measuring expansion cement slurry expansion pressure stress Download PDFInfo
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- CN105509934A CN105509934A CN201610054437.2A CN201610054437A CN105509934A CN 105509934 A CN105509934 A CN 105509934A CN 201610054437 A CN201610054437 A CN 201610054437A CN 105509934 A CN105509934 A CN 105509934A
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- cement slurry
- expansion cement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
Abstract
Provided is a method for measuring expansion cement slurry expansion pressure stress. The method comprises the following steps that 1, hole drilling is conducted; 2, expansion cement slurry is prepared; 3, grouting is conducted; 4, multiple pressure sensor sets are equidistantly arranged on the portions, in different depths from portholes, in all cylindrical holes; 6, the multiple pressure sensor sets are connected with a pressure collection system, and pressure data at different times after the expansion cement slurry is grouted is collected; 7, an image that the expansion cement slurry pressure stress of expanding agents with different mass content changes with the time is drawn according to the pressure data collected in the sixth step, and expansion pressure stress stable value and limit value are obtained, that is to say, the expansion cement slurry expansion pressure stress is measured. According to the method for measuring the expansion cement slurry expansion pressure stress, the problem that the expansion cement slurry expansion pressure stress in not measured can be solved, the expansion pressure stress of the expanding agents with different content can be measured, a basis can be provided for a rock mass numerical simulation parameter valuation, and the measuring result is accurate.
Description
Technical field
The present invention relates to a kind of method measuring expansion cement slurry turgor pressure stress.
Background technology
The application of swelling agent in current building operation is very extensive, and its major function is the dry shrinkage and cold shrinkage in compensating concrete hardening process.For correlated performances more concrete in betterment works, swelling agent can be applied to the reinforced concrete works such as the underground relevant with waterproof, water conservancy project, Hai Gong, subway, tunnel, in use improve concrete density, impermeability, wearing quality, and the bond stress etc. to reinforcing bar.Present stage expansion cement slurry start gradually in support engineering application, expansion cement slurry can be used for anchorage body, its lateral expansion performance is utilized to improve anti-pulling of anchor bar, can also meet the needs in engineering reality and save material simultaneously, this is applied in rock anchorage technical elements significant economic benefit; And the compressive stress that the grout of different bulking agent levels produces country rock body, engineering design, workmen's problem of needing emphasis to consider, also be that expansion cement slurry applies run into obstacle in engineering, the turgor pressure stress therefore correctly obtaining the grout of different bulking agent levels is the key of expansion cement slurry widespread use.But at present in the application of expansion cement slurry, for correctly obtaining expansion cement slurry turgor pressure stress, but there is no corresponding measuring method.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of method measuring expansion cement slurry turgor pressure stress, the problem not measuring expansion cement slurry turgor pressure stress can be solved, the turgor pressure stress of different bulking agent levels can be recorded, can provide foundation for rock mass parameters for numerical simulation assignment, measurement result is accurate.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of method measuring expansion cement slurry turgor pressure stress, and the method comprises the following steps:
Step 1: boring: drill through multiple cylinder bore at a certain distance on country rock body;
Step 2: preparation expansion cement slurry: the expansion cement slurry preparing multiple different swelling agent mass content, the quantity of expansion cement slurry is identical with the quantity of cylinder bore;
Step 3: slip casting: the expansion cement slurry of different swelling agent mass content is injected cylinder bore respectively;
Step 4: from different depth disposed at equal distance many groups pressure transducer group in aperture in each cylinder bore, often organize pressure transducer group to be made up of three pressure transducers be arranged on same degree of depth cross section, in same plane, three mutual angles of pressure transducer on cross section are 120 degree;
Step 5: by expansion cement slurry vibration compacting, then aperture use is not sealed containing the grout of swelling agent;
Step 6: pressure transducer group will be organized more and be connected with pressure acquisition system, the pressure data of different time after collection perfusion expansion cement slurry;
Step 7: carry out calculating turgor pressure stress data according to the pressure data that step 6 gathers, computing method are as follows:
By the pressure mean values F=(F1+F2+F3)/3 of the same degree of depth in data acquisition cylinder bore of collection, wherein F1, F2, the turgor pressure force value that three pressure transducers that F3 is respectively the same degree of depth in a cylinder bore record, again according to the computing formula of compressive stress, i.e. compression stress ot=F/A, calculates turgor pressure stress;
Draw the expansion cement slurry compressive stress modified-image in time of different swelling agent mass content, obtain turgor pressure stress stability value and ultimate value,
Namely expansion cement slurry turgor pressure stress is recorded.
In step 1, the diameter of cylinder bore is 50 millimeters, and the degree of depth is 1 meter; Distance between two cylinder bores is 2 meters, and the quantity of cylinder bore is 3.
In step 2, prepare three kinds of expansion cement slurries, its swelling agent mass content is respectively 15%, 25% and 35%.
In step 4, from the equidistant each layout of the depth of 200 of aperture millimeters, 400 millimeters, 600 millimeters, 800 millimeters one group of pressure transducer group in each cylinder bore.
In step 6, the data of collection are: in first 24 hours after perfusion expansion cement slurry, gathered a pressure data every 2 hours; Within 24 hours after perfusion expansion cement slurry, in 48 hours, gathered a pressure data every 6 hours, the data altogether after collection perfusion expansion cement slurry in 48 hours.
In step 7, the stationary value that after the turgor pressure stress criterion value of expansion cement slurry gets certain hour, compressive stress size tends towards stability, the turgor pressure stress limit value of expansion cement slurry gets the maximal value in the turgor pressure stress in same expansion agent content.
Pressure transducer and pressure acquisition system are commercially available prod, adopt the diaphragm pressure sensor measuring system that Wuhan Jin Hui Electronic Science and Technology Co., Ltd. produces.
A kind of method measuring expansion cement slurry turgor pressure stress provided by the invention, by the turgor pressure stress utilizing pressure transducer and pressure acquisition system to measure the expansion cement slurry of different bulking agent levels, the problem not measuring expansion cement slurry turgor pressure stress can be solved, the turgor pressure stress of different bulking agent levels can be recorded, can provide foundation for rock mass parameters for numerical simulation assignment, measurement result is accurate; When swelling agent is used for static blasting construction as stone cracking agent, according to rock mechanics, the suitableeest bulking agent levels that can make rock crack can be selected, saves swelling agent starting material.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the vertical view of country rock body of the present invention;
Fig. 2 is that the A-A of Fig. 1 of the present invention is to cut-open view;
Fig. 3 is the compressive stress modified-image in time that pressure data that swelling agent mass content that the present invention records is respectively the expansion cement slurry of 15% is drawn;
Fig. 4 is the compressive stress modified-image in time that pressure data that swelling agent mass content that the present invention records is respectively the expansion cement slurry of 25% is drawn;
Fig. 5 is the compressive stress modified-image in time that pressure data that swelling agent mass content that the present invention records is respectively the expansion cement slurry of 25% is drawn.
Embodiment
Embodiment one
Measure a method for expansion cement slurry turgor pressure stress, the method comprises the following steps:
Step 1: boring: drill through multiple cylinder bore 2 at a certain distance on country rock body 1, as shown in Figure 1;
Step 2: preparation expansion cement slurry: the expansion cement slurry preparing multiple different swelling agent mass content, the quantity of expansion cement slurry is identical with the quantity of cylinder bore 2;
Take with electronic scales the cement that 3 deck labels are 42.5, weight is respectively 1700 grams, 1500 grams, 1300 grams; Take weight and be respectively 300 grams, 500 grams, 700 grams swelling agents; Take three groups of warm water (50 degrees centigrade), often organize 600 grams; Successively by three groups of cement, swelling agent and warm water mixing, be configured to each 1 group of the expansion cement slurry that bulking agent levels is 15%, 25%, 35%;
Step 3: slip casting: the expansion cement slurry of different swelling agent mass content is injected cylinder bore 2 respectively;
Step 4: from different depth disposed at equal distance many groups pressure transducer group 3 in aperture in each cylinder bore 2, often organize pressure transducer group 3 to be made up of three pressure transducers be arranged on same degree of depth cross section, in same plane, three mutual angles of pressure transducer on cross section are 120 degree, as shown in Figure 2;
Step 5: by expansion cement slurry vibration compacting, then aperture use is not sealed containing the grout of swelling agent;
Step 6: pressure transducer group 3 will be organized more and be connected with pressure acquisition system, the pressure data of different time after collection perfusion expansion cement slurry;
Step 7: carry out calculating turgor pressure stress data according to the pressure data that step 6 gathers, computing method are: by the pressure mean values F=(F1+F2+F3)/3 of the same degree of depth in data acquisition cylinder bore of collection, wherein F1, F2, the turgor pressure force value that three pressure transducers that F3 is respectively the same degree of depth in a cylinder bore record, again according to the computing formula of compressive stress, i.e. compression stress ot=F/A, calculates turgor pressure stress;
The turgor pressure stress data that swelling agent mass content is respectively the expansion cement slurry of 15% is as shown in table 1,
The turgor pressure Stress calculation table of table 115% swelling agent
| Time (h) | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 30 | 36 | 42 | 48 |
| Compressive stress (KN) | 0 | 0.091 | 0.303 | 0.421 | 0.536 | 0.673 | 0.642 | 0.656 | 0.638 | 0.626 | 0.646 | 0.639 | 0.630 | 0.649 | 0.626 | 0.628 | 0.630 |
Modified-image is as shown in Figure 3 in time for the pressure data that swelling agent mass content is respectively the expansion cement slurry of 15% compressive stress of drawing;
The turgor pressure stress data that swelling agent mass content is respectively the expansion cement slurry of 15% is as shown in table 2,
The turgor pressure Stress calculation table of table 225% swelling agent
| Time (h) | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 30 | 36 | 42 | 48 |
| Compressive stress (KN) | 0 | 0.126 | 0.364 | 0.643 | 0.876 | 1.119 | 1.096 | 1.031 | 1.019 | 1.048 | 1.063 | 1.052 | 1.046 | 1.036 | 1.011 | 1.040 | 1.025 |
Modified-image is as shown in Figure 4 in time for the pressure data that swelling agent mass content is respectively the expansion cement slurry of 25% compressive stress of drawing;
The turgor pressure stress data that swelling agent mass content is respectively the expansion cement slurry of 15% is as shown in table 3,
The turgor pressure Stress calculation table of table 335% swelling agent
| Time (h) | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 30 | 36 | 42 | 48 |
| Compressive stress (KN) | 0 | 0.214 | 0.524 | 0.876 | 1.193 | 1.496 | 1.410 | 1.321 | 1.395 | 1.412 | 1.361 | 1.350 | 1.410 | 1.412 | 1.398 | 1.423 | 1.382 |
Modified-image is as shown in Figure 5 in time for the pressure data that swelling agent mass content is respectively the expansion cement slurry of 25% compressive stress of drawing;
Draw the expansion cement slurry compressive stress modified-image in time of different swelling agent mass content, obtain turgor pressure stress stability value and ultimate value,
Namely expansion cement slurry turgor pressure stress is recorded.
In step 1, the diameter of cylinder bore 2 is 50 millimeters, and the degree of depth is 1 meter; Distance between two cylinder bores 2 is 2 meters, and the quantity of cylinder bore 2 is 3.
In step 2, prepare three kinds of expansion cement slurries, its swelling agent mass content is respectively 15%, 25% and 35%.
In step 4, from the equidistant each layout of the depth of 200 millimeters of aperture, 400 millimeters, 600 millimeters, 800 millimeters one group of pressure transducer group 3 in each cylinder bore 2.
In step 6, the data of collection are: in first 24 hours after perfusion expansion cement slurry, gathered a pressure data every 2 hours; Within 24 hours after perfusion expansion cement slurry, in 48 hours, gathered a pressure data every 6 hours, the data altogether after collection perfusion expansion cement slurry in 48 hours.
In step 7, the stationary value that after the turgor pressure stress criterion value of expansion cement slurry gets certain hour, compressive stress size tends towards stability, the turgor pressure stress limit value of expansion cement slurry gets the maximal value in the turgor pressure stress in same expansion agent content.
Pressure transducer and pressure acquisition system are commercially available prod, adopt the diaphragm pressure sensor measuring system that Wuhan Jin Hui Electronic Science and Technology Co., Ltd. produces.
Embodiment two
Also can drill through 6 cylinder bores 2 at a certain distance on country rock body 1, prepare the expansion cement slurry of different swelling agent mass content, the expansion cement slurry of same expansion agent mass content pours in two cylinder bores 2 respectively, test according to the method described above, collect data, get the mean value of two groups of compressive stress data of the expansion cement slurry of same expansion agent mass content, draw the expansion cement slurry compressive stress modified-image in time of different swelling agent mass content, obtain turgor pressure stress stability value and ultimate value, namely record expansion cement slurry turgor pressure stress.
Claims (6)
1. measure a method for expansion cement slurry turgor pressure stress, it is characterized in that the method comprises the following steps:
Step 1: boring: drill through multiple cylinder bore (2) on country rock body (1) at a certain distance;
Step 2: preparation expansion cement slurry: the expansion cement slurry preparing multiple different swelling agent mass content, the quantity of expansion cement slurry is identical with the quantity of cylinder bore (2);
Step 3: slip casting: the expansion cement slurry of different swelling agent mass content is injected cylinder bore (2) respectively;
Step 4: from different depth disposed at equal distance many groups pressure transducer group (3) in aperture in each cylinder bore (2), often organize pressure transducer group (3) to be made up of three pressure transducers be arranged on same degree of depth cross section, in same plane, three mutual angles of pressure transducer on cross section are 120 degree;
Step 5: by expansion cement slurry vibration compacting, then aperture use is not sealed containing the grout of swelling agent;
Step 6: pressure transducer group (3) will be organized more and be connected with pressure acquisition system, the pressure data of different time after collection perfusion expansion cement slurry;
Step 7: carry out calculating turgor pressure stress data according to the pressure data that step 6 gathers, draw the expansion cement slurry compressive stress modified-image in time of different swelling agent mass content, obtain turgor pressure stress stability value and ultimate value,
Namely expansion cement slurry turgor pressure stress is recorded.
2. a kind of method measuring expansion cement slurry turgor pressure stress according to claim 1, is characterized in that:
In step 1, the diameter of cylinder bore (2) is 50 millimeters, and the degree of depth is 1 meter; Distance between two cylinder bores (2) is 2 meters, and the quantity of cylinder bore (2) is 3.
3. a kind of method measuring expansion cement slurry turgor pressure stress according to claim 2, is characterized in that: in step 2, and prepare three kinds of expansion cement slurries, its swelling agent mass content is respectively 15%, 25% and 35%.
4. a kind of method measuring expansion cement slurry turgor pressure stress according to claim 1, it is characterized in that: in step 4, from the equidistant each layout of the depth of 200 millimeters of aperture, 400 millimeters, 600 millimeters, 800 millimeters one group of pressure transducer group (3) in each cylinder bore (2).
5. a kind of method measuring expansion cement slurry turgor pressure stress according to claim 1, is characterized in that in step 6, and the data of collection are: in first 24 hours after perfusion expansion cement slurry, gathered a pressure data every 2 hours; Within 24 hours after perfusion expansion cement slurry, in 48 hours, gathered a pressure data every 6 hours, the data altogether after collection perfusion expansion cement slurry in 48 hours.
6. a kind of method measuring expansion cement slurry turgor pressure stress according to claim 1, it is characterized in that: in step 7, the stationary value that after the turgor pressure stress criterion value of expansion cement slurry gets certain hour, compressive stress size tends towards stability, the turgor pressure stress limit value of expansion cement slurry gets the maximal value in the turgor pressure stress in same expansion agent content.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106638594A (en) * | 2017-01-21 | 2017-05-10 | 三峡大学 | Method for rapidly determining optimal adding content of expanding agent and application of method |
| CN107462492A (en) * | 2017-07-17 | 2017-12-12 | 三峡大学 | The anchor rod anchored research method of large dosage swelling agent is carried out for CT scan technology |
| CN108169260A (en) * | 2017-12-28 | 2018-06-15 | 三峡大学 | With the method for CT scan analysis different content swelling agent anchoring body mechanism of intumescence |
| CN109374409A (en) * | 2018-10-16 | 2019-02-22 | 三峡大学 | A kind of method of on-site rapid measurement crustal stress |
| CN109580346A (en) * | 2018-11-21 | 2019-04-05 | 三峡大学 | A kind of device and method of the compressive property using mgnetic observations expansion cement slurry |
| CN111351602A (en) * | 2020-02-14 | 2020-06-30 | 广东省建筑科学研究院集团股份有限公司 | Method for measuring micro-expansion stress of cement-based material |
| CN113008439A (en) * | 2021-02-01 | 2021-06-22 | 浙江工业大学 | Test device for measuring inert slurry pressures at different angles and depths and use method thereof |
| WO2022009957A1 (en) * | 2020-07-09 | 2022-01-13 | 国立大学法人山口大学 | Method for estimating stress-strain history in cement-based composite material, and calcite grain aggregate |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106638594B (en) * | 2017-01-21 | 2019-07-26 | 三峡大学 | A kind of method and its application of the most suitable bulking agent levels addition of quick determination |
| CN106638594A (en) * | 2017-01-21 | 2017-05-10 | 三峡大学 | Method for rapidly determining optimal adding content of expanding agent and application of method |
| CN107462492A (en) * | 2017-07-17 | 2017-12-12 | 三峡大学 | The anchor rod anchored research method of large dosage swelling agent is carried out for CT scan technology |
| CN108169260A (en) * | 2017-12-28 | 2018-06-15 | 三峡大学 | With the method for CT scan analysis different content swelling agent anchoring body mechanism of intumescence |
| CN108169260B (en) * | 2017-12-28 | 2020-06-30 | 三峡大学 | Method for analyzing expansion mechanism of anchoring body with different content of expanding agent by CT scanning |
| CN109374409A (en) * | 2018-10-16 | 2019-02-22 | 三峡大学 | A kind of method of on-site rapid measurement crustal stress |
| CN109374409B (en) * | 2018-10-16 | 2020-10-02 | 三峡大学 | Method for rapidly measuring ground stress on site |
| CN109580346B (en) * | 2018-11-21 | 2021-08-10 | 三峡大学 | Device and method for measuring compressive resistance of expanded cement slurry by using magnetic force |
| CN109580346A (en) * | 2018-11-21 | 2019-04-05 | 三峡大学 | A kind of device and method of the compressive property using mgnetic observations expansion cement slurry |
| CN111351602A (en) * | 2020-02-14 | 2020-06-30 | 广东省建筑科学研究院集团股份有限公司 | Method for measuring micro-expansion stress of cement-based material |
| CN111351602B (en) * | 2020-02-14 | 2022-05-24 | 广东省建筑科学研究院集团股份有限公司 | Method for measuring micro-expansion stress of cement-based material |
| WO2022009957A1 (en) * | 2020-07-09 | 2022-01-13 | 国立大学法人山口大学 | Method for estimating stress-strain history in cement-based composite material, and calcite grain aggregate |
| CN113008439A (en) * | 2021-02-01 | 2021-06-22 | 浙江工业大学 | Test device for measuring inert slurry pressures at different angles and depths and use method thereof |
| CN113008439B (en) * | 2021-02-01 | 2022-05-20 | 浙江工业大学 | Test device and method for measuring inert slurry pressures at different angles and depths |
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Effective date of registration: 20201224 Address after: Building 2, No. 3, Fuqian Road, Hailing District, Taizhou City, Jiangsu Province Patentee after: Taizhou Haitong Asset Management Co.,Ltd. Address before: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20201224 Address after: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: 443002 No. 8, University Road, Yichang, Hubei Patentee before: CHINA THREE GORGES University |