CN102890030A - Experiment device and method for testing change of elastic modulus of dam concrete along with age - Google Patents
Experiment device and method for testing change of elastic modulus of dam concrete along with age Download PDFInfo
- Publication number
- CN102890030A CN102890030A CN2012104063053A CN201210406305A CN102890030A CN 102890030 A CN102890030 A CN 102890030A CN 2012104063053 A CN2012104063053 A CN 2012104063053A CN 201210406305 A CN201210406305 A CN 201210406305A CN 102890030 A CN102890030 A CN 102890030A
- Authority
- CN
- China
- Prior art keywords
- concrete
- steel pipe
- length
- time
- elastic modulus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses an experiment device which can acquire a process that the elastic modulus of dam concrete is changed along with the age under a real maintenance condition and can supply precise experiment parameters to engineering value simulation and calculation analysis. The experiment device comprises experiment equipment and a tester, wherein the tester is a drilling elastic modulus tester; the experiment equipment comprises a steel tube and relevant accessory members; the bottom of the steel tube is closed, and the steel tube is inserted into a deep hole in the bin surface of a concrete pouring layer; a tripod is arranged at the upper part of the steel tube; three peaks of the tripod are fixed into a water permeation hole bracket through steel bars; and a butter layer and a leather paper layer are arranged on the pipe of the steel tube from inside to outside. The invention also provides an experiment method.
Description
Technical field
The invention belongs to xoncrete structure monitoring and the technical field of constructing in the Hydraulic and Hydro-Power Engineering, relate to particularly a kind of dam concrete bullet mould of testing with the experimental provision that change the length of time, the experimental technique that utilizes this experimental provision also is provided.
Background technology
Dam concrete bullet mould stems from indoor wet screening test specimen mostly at present, limit by the indoor laboratory condition, concrete bullet mould is often only tested limited several typical (7 days length of time, 14 days, 28 days, 90 days, 180 days) bullet mould value, obtain the development and change course that plays mould by limited several measured value matched curves at last.For dam concrete, since between scene and the laboratory experiment in the difference of the aspects such as grating and curing condition, actual bullet moding course and laboratory experiment value often have larger difference, indoor bullet mould test value can not reflect actual conditions fully truly, especially early the length of time (in 3 days) concrete bullet moding course method of testing then be in blank always.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of bullet mould of dam concrete under true curing condition that can obtain with changing course the length of time, the experimental provision of the test dam concrete bullet mould of more accurate experiment parameter with variation in the length of time is provided for engineering numerical simulation and computational analysis.
Technical solution of the present invention is: the experimental provision that this test dam concrete bullet mould changed with the length of time, it comprises experimental facilities and testing tool, testing tool is the boring elastic modulus tester, experimental facilities is steel pipe, the base seal of steel pipe also inserts in the deep hole of concrete lift storehouse face, the top of steel pipe is provided with tripod, and three summits of tripod all are fixed to the water seepage hole support by reinforcing bar, and butter layer, layers of kraft paper are set on the tube wall of steel pipe from the inside to the outside.
The experimental technique that utilizes this device also is provided, for the concrete of long-age, has adopted bore mode to form the needed hole wall of experiment, then the bullet mould in the different length of times has been tested by the boring elastic modulus tester; For the concrete in length of time morning, manually establish the hole by steel pipe and form the needed hole wall of experiment, then the bullet mould in the different length of times is tested by the boring elastic modulus tester.
Owing to adopting advanced boring elastic modulus tester by this experimental provision and experimental technique thereof, carry out field experiment, dam concrete plays modular curve really under the actual curing condition so can obtain.The bullet mould that this kind mode is obtained more conforms to reality, especially can omnidistance reflection practice of construction and curing condition under the variation course of concrete bullet mould during since length of time morning, the actual bullet of the data of obtaining thus and dam concrete mould is more approaching, precision for further raising simulation calculation, be construction time Rational choice temperature controlled anticracking measure, also provide Reliable guarantee for the true overall work condition of holding the dam construction phase.
Description of drawings
Fig. 1 shows test dam concrete bullet mould according to the present invention with the structural representation of the experimental provision that changes the length of time.
Fig. 2 shows and utilizes the present invention to carry out the contrast of the on-the-spot full grading concrete bullet mould test matched curve of dam and indoor full grading concrete experiment bullet modular curve.
Embodiment
As shown in Figure 1, the experimental provision that this test dam concrete bullet mould changed with the length of time, it comprises experimental facilities and testing tool, testing tool is the boring elastic modulus tester, experimental facilities is steel pipe 1, and the base seal of steel pipe also inserts in the deep hole of concrete lift storehouse face 2, and the top of steel pipe is provided with tripod 4, three summits of tripod all are fixed to water seepage hole support 6 by reinforcing bar 5, and butter layer, layers of kraft paper are set on the tube wall of steel pipe from the inside to the outside.
Preferably, weld hanger 3 on the top of steel pipe, so that the later stage is extracted steel pipe.
Preferably, the quantity of layers of kraft paper is two-layer, bonds by adhesive tape between the two-layer layers of kraft paper.
Preferably, outside layers of kraft paper, also scribble one deck butter layer.
The experimental technique that utilizes this device also is provided, for the concrete of long-age, has adopted bore mode to form the needed hole wall of experiment, then the bullet mould in the different length of times has been tested by the boring elastic modulus tester; For the concrete in length of time morning, manually establish the hole by steel pipe and form the needed hole wall of experiment, then the bullet mould in the different length of times is tested by the boring elastic modulus tester.
Owing to adopting advanced boring elastic modulus tester by this experimental provision and experimental technique thereof, carry out field experiment, dam concrete plays modular curve really under the actual curing condition so can obtain.The bullet mould that this kind mode is obtained more conforms to reality, especially can omnidistance reflection practice of construction and curing condition under the variation course of concrete bullet mould during since length of time morning, the actual bullet of the data of obtaining thus and dam concrete mould is more approaching, precision for further raising simulation calculation, be construction time Rational choice temperature controlled anticracking measure, also provide Reliable guarantee for the true overall work condition of holding the dam construction phase.
The boring elastic modulus tester is used more in the Geotechnical Engineering field, be mainly used in testing the deformation modulus of rock mass, the domestic precedent that there is no of the use of boring elastic modulus tester in dam concrete, test more beyond example in particular for on-the-spot full grading concrete bullet mould of construction time, achievement in research will be conducive to us and more clearly understand practical development and the Changing Pattern that low temperature is built concrete bullet mould under the state, also will further improve us to the understanding of extra-high-speed arch dam real work condition.
Preferably, the concrete for length of time morning adopts following steps to test:
(1) chooses the steel pipe of root bottom part sealing according to the diameter of the probe deformed plate of boring elastic modulus tester;
(2) coat butter in steel pipe walls, then wrap two-layer kraft around the tube wall, with the adhesive tape bonding, so that kraft is close to tube wall, can guarantee smoothly so that steel pipe is extracted rear tube wall, then on kraft, coat again butter one deck;
(3) steel pipe is vertically stood on the storehouse face of wanting casting concrete, the storehouse face down drilling depth be that 10-20cm, slightly larger in diameter are in the deep hole of diameter of steel tube, then steel pipe is vertically put into deep hole, and add an A-frame on the top of steel pipe, can not occur tilting in the process of vibrating of steel pipe after concreting guaranteeing;
(4) fix steel pipe after, the beginning casting concrete, building bed thickness is 3.0m, after this storehouse concreting is complete, steel pipe bottom 3.0m will be embedded in inside concrete, begin tube drawing after 1 day after this storehouse concrete is received the storehouse, before the tube drawing, with the steel pipe horizontal direction clockwise and be rotated counterclockwise, then with loop wheel machine steel pipe is slowly extracted first;
(5) utilize boring elastic modulus tester test steel pipe to obtain the concrete actual mould value that plays.
Fig. 2 shows and utilizes the present invention to carry out the contrast of dam on-the-spot full grading concrete bullet mould test matched curve and indoor design curve, and the on-the-spot actual bullet mould of visible dam concrete and laboratory experiment value have obvious difference.
During actual measurement bullet mould, can consider before the 7 day length of time that then test in per 1 day once plays mould since the 1st day length of time, the bullet mould after 7-14 days can once play mould every test in 2 days; Age concrete can be every 3 days test one secondary data in 14 days-28 days; Can be every 7 days test one secondary data after 28 days.The experimental data of analysis-by-synthesis actual measurement according to the analysis principle of boring elastic modulus tester, obtains the concrete actual mould value that plays.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment all still belong to the protection domain of technical solution of the present invention.
Claims (7)
1. test dam concrete bullet mould is with the experimental provision of variation in the length of time, it is characterized in that: it comprises experimental facilities and testing tool, testing tool is the boring elastic modulus tester, experimental facilities is steel pipe (1), the base seal of steel pipe also inserts in the deep hole of concrete lift storehouse face (2), the top of steel pipe is provided with tripod (4), and three summits of tripod all are fixed to water seepage hole support (6) by reinforcing bar (5), and butter layer, layers of kraft paper are set on the tube wall of steel pipe from the inside to the outside.
2. test dam concrete bullet mould according to claim 1 is characterized in that with the experimental provision that change the length of time: at the top of steel pipe welding hanger (3).
3. test dam concrete bullet mould according to claim 1 is with the experimental provision of variation in the length of time, and it is characterized in that: the quantity of layers of kraft paper is two-layer, bonds by adhesive tape between the two-layer layers of kraft paper.
4. test dam concrete bullet mould according to claim 3 is characterized in that: also scribble one deck butter layer outside layers of kraft paper with the experimental provision that change the length of time.
5. test dam concrete bullet mould is characterized in that with the experimental technique that change the length of time: for the concrete of long-age, adopt bore mode to form the needed hole wall of experiment, then the bullet mould in the different length of times is tested by the boring elastic modulus tester; For the concrete in length of time morning, manually establish the hole by steel pipe and form the needed hole wall of experiment, then the bullet mould in the different length of times is tested by the boring elastic modulus tester.
6. test dam concrete bullet mould according to claim 5 is characterized in that with the experimental technique that change the length of time: the concrete for length of time morning adopts following steps to test:
(1) chooses the steel pipe of root bottom part sealing according to the diameter of the probe deformed plate of boring elastic modulus tester;
(2) coat butter in steel pipe walls, then wrap two-layer kraft around the tube wall, with the adhesive tape bonding, so that kraft is close to tube wall, can guarantee smoothly so that steel pipe is extracted rear tube wall, then on kraft, coat again butter one deck;
(3) steel pipe is vertically stood on the storehouse face of wanting casting concrete, the storehouse face down drilling depth be that 10-20cm, slightly larger in diameter are in the deep hole of diameter of steel tube, then steel pipe is vertically put into deep hole, and add an A-frame on the top of steel pipe, can not occur tilting in the process of vibrating of steel pipe after concreting guaranteeing;
(4) fix steel pipe after, the beginning casting concrete, building bed thickness is 3.0m, after this storehouse concreting is complete, steel pipe bottom 3.0m will be embedded in inside concrete, begin tube drawing after 1 day after this storehouse concrete is received the storehouse, before the tube drawing, with the steel pipe horizontal direction clockwise and be rotated counterclockwise, then with loop wheel machine steel pipe is slowly extracted first;
(5) utilize boring elastic modulus tester test steel pipe to obtain the concrete actual mould value that plays.
According to claim 5 or 6 described test dam concrete bullet moulds with the experimental technique that changes the length of time, it is characterized in that: the length of time, the concrete greater than 21 days was the concrete of long-age, be the early concrete in the length of time less than 21 days concrete the length of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104063053A CN102890030A (en) | 2012-10-23 | 2012-10-23 | Experiment device and method for testing change of elastic modulus of dam concrete along with age |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104063053A CN102890030A (en) | 2012-10-23 | 2012-10-23 | Experiment device and method for testing change of elastic modulus of dam concrete along with age |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102890030A true CN102890030A (en) | 2013-01-23 |
Family
ID=47533605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104063053A Pending CN102890030A (en) | 2012-10-23 | 2012-10-23 | Experiment device and method for testing change of elastic modulus of dam concrete along with age |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102890030A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758739A (en) * | 2016-05-24 | 2016-07-13 | 河海大学 | Method for obtaining duration curve of early age shear strength of concrete intermittent surface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101163937A (en) * | 2005-06-16 | 2008-04-16 | 东海高热工业株式会社 | Vertical firing furnace and firing method using it |
| CN101173882A (en) * | 2007-10-30 | 2008-05-07 | 山东省建筑科学研究院 | Anchorage detecting method for concrete strength under restriction |
| JP2008268123A (en) * | 2007-04-24 | 2008-11-06 | Oriental Shiraishi Corp | System and method for measuring stress of reinforced concrete member |
| CN101762421A (en) * | 2010-02-09 | 2010-06-30 | 邱平 | Direct pulling device and method for detecting compressive strength of concrete |
| CN202055232U (en) * | 2011-04-28 | 2011-11-30 | 中国葛洲坝集团股份有限公司 | Steel drawing tube device for drain hole of high-lift layer concrete |
| WO2012094284A2 (en) * | 2011-01-04 | 2012-07-12 | Fdh Engineering | A method of determining tension in a rod |
| CN202903579U (en) * | 2012-10-23 | 2013-04-24 | 中国水利水电科学研究院 | Experimental device for testing elastic modulus change of dam concrete with ages |
-
2012
- 2012-10-23 CN CN2012104063053A patent/CN102890030A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101163937A (en) * | 2005-06-16 | 2008-04-16 | 东海高热工业株式会社 | Vertical firing furnace and firing method using it |
| JP2008268123A (en) * | 2007-04-24 | 2008-11-06 | Oriental Shiraishi Corp | System and method for measuring stress of reinforced concrete member |
| CN101173882A (en) * | 2007-10-30 | 2008-05-07 | 山东省建筑科学研究院 | Anchorage detecting method for concrete strength under restriction |
| CN101762421A (en) * | 2010-02-09 | 2010-06-30 | 邱平 | Direct pulling device and method for detecting compressive strength of concrete |
| WO2012094284A2 (en) * | 2011-01-04 | 2012-07-12 | Fdh Engineering | A method of determining tension in a rod |
| CN202055232U (en) * | 2011-04-28 | 2011-11-30 | 中国葛洲坝集团股份有限公司 | Steel drawing tube device for drain hole of high-lift layer concrete |
| CN202903579U (en) * | 2012-10-23 | 2013-04-24 | 中国水利水电科学研究院 | Experimental device for testing elastic modulus change of dam concrete with ages |
Non-Patent Citations (2)
| Title |
|---|
| 夏中伏: "浅谈混凝土防渗墙接头孔"拔管"法施工", 《四川水利》 * |
| 景锋: "钻孔弹模计检测坝基固结灌浆试验效果", 《第四届中国岩石锚固与注浆学术会议论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758739A (en) * | 2016-05-24 | 2016-07-13 | 河海大学 | Method for obtaining duration curve of early age shear strength of concrete intermittent surface |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103558044B (en) | The indoor model test device that shield tunnel mortar depositing construction affects neighboring piles | |
| CN103115788B (en) | The indoor model test device that existing tunnel affects by two-wire subway work | |
| CN106018740B (en) | Hole pressure touching methods demarcate can system | |
| CN102912780B (en) | Sandy soil water-immersion testing method for loess collapsible deformation | |
| CN104833618B (en) | To heterogeneous reservoir simulate the method and apparatus of profile control in laboratory | |
| CN103996348A (en) | Laboratory model test device for testing influence on operating tunnel from vertically-overlapped tunnel construction | |
| CN108643247B (en) | Testing device and testing method for soil body reinforcement model at bottom of rectangular foundation pit in soft soil area | |
| CN105696636B (en) | Can in Simulation of Excavation Process WATER LEVEL CHANGES excavation models experimental rig | |
| CN103792172B (en) | Adding pressure type falling head permeameter | |
| CN102590070B (en) | Pressure-resistant multi-layer cavity corrosion test device and method | |
| CN105352867A (en) | Simulation multi-gap assembled medium tunnel seepage test method | |
| CN207348118U (en) | A kind of suction barrel base for model test | |
| CN106970181B (en) | Drainage consolidation test device and method for grouting slurry behind wall in stratum | |
| CN202903579U (en) | Experimental device for testing elastic modulus change of dam concrete with ages | |
| CN109723025B (en) | Underground structure boundary seepage test device and using method thereof | |
| CN103033460B (en) | The determinator of soil body horizontal osmotic coefficient and method thereof | |
| CN105672378B (en) | Simulate the excavation of foundation pit model test apparatus of artesian head lifting | |
| CN102135491B (en) | Drainage type segment lining model pore hydrostatic test device | |
| CN107870177B (en) | Simulation device for influence of pores on frost resistance of cement-based material and freeze-thaw experiment operation method | |
| CN102890030A (en) | Experiment device and method for testing change of elastic modulus of dam concrete along with age | |
| CN109827886A (en) | The impervious experimental method of cement concrete joint sealing material | |
| CN106932254B (en) | Light-gauge steel section and foam concrete interface sliding method for testing performance | |
| CN206339363U (en) | A kind of simple underground structure Analysis of Buoyancy model test apparatus | |
| CN205384209U (en) | Capillary rise height and feedwater degree apparatus | |
| CN107728492A (en) | A kind of deformable solution-cavity filling automatic simulation system and emulation mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130123 |