CN202339294U - Device for manufacturing test piece for carrying out simulated experiment on high-pressure hydraulic fracture of concrete member - Google Patents
Device for manufacturing test piece for carrying out simulated experiment on high-pressure hydraulic fracture of concrete member Download PDFInfo
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- CN202339294U CN202339294U CN2011203977513U CN201120397751U CN202339294U CN 202339294 U CN202339294 U CN 202339294U CN 2011203977513 U CN2011203977513 U CN 2011203977513U CN 201120397751 U CN201120397751 U CN 201120397751U CN 202339294 U CN202339294 U CN 202339294U
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Abstract
The utility model discloses a device for manufacturing a test piece for carrying out a simulated experiment on the high-pressure hydraulic fracture of a concrete member. The manufactured test piece can be used for simulating more accurately and carrying out the experiment more easily. The device comprises a steel mould and a crevice forming member; the crevice forming member comprises a pair of rigid crevice forming sheets, a fixing member and two water pipes; the pair of rigid crevice forming sheets comprises an upper sheet and a lower sheet; a gap for forming a crevice in the member is formed between the upper sheet and the lower sheet; the two water pipes are communicated with the crevice and the outside respectively; the two water pipes are respectively a first water inlet pipe and a second water inlet pipe, wherein the first water inlet pipe is provided with a first water inlet port, a first horizontal part and a first vertical part, and the second water inlet pipe is provided with a second water inlet port, a second horizontal part and a second vertical part; the pair of rigid crevice forming sheets are fixedly arranged on one side, which faces to the inner cavity of the steel mould, of the fixing member; and the fixing member is fixedly connected with the steel mould.
Description
Technical field
The utility model belongs to the technical field of water conservancy dam simulated experiment; Relate more specifically to a kind of device of making concrete component high-pressure hydraulic splitting simulated experiment test specimen; This test specimen is applicable to the mechanism and the rule of research xoncrete structure generation hydraulic fracture, also can be used for exploring the method that reduces xoncrete structure hydraulic fracture possibility.
Background technology
Hydraulic fracture is the current processes with the coupling of solid deformation on every side of in rock mass or concrete gap, moving, and shows as High-Pressure Water existing crack and space in rock mass or the concrete are driven expansion, expansion, perforation etc. each other.The hydraulic fracture the name of the game is to have the water under high pressure of high potential energy to rock mass or concrete destruction.
Hydraulic fracture originates from oil and gas industry, has been widely used in the raising the output of oil gas well.Oil gas is mainly exploited from the rock stratum, so at present more relatively to the mechanism research of rock hydraulic fracture.In water conservancy circle, the effect of hydraulic fracture in earth and rockfill dam be the attention that has caused people of morning also.This is accompanied by a series of major accidents and begins, like the spy of the U.S. pause the Hai Teyouwei dam (Hyttejuvet) of dam (Teton), Norway, the Ba Dehaiteba (Balderhead) of Britain etc.
In recent years, China is building and is planning to build large quantities of high dams, and the hydraulic fracture problem becomes the hot subject of water conservancy and hydropower industry research once more.But China concentrates on the crack rock aspect of the dam foundation to the research of hydraulic fracture, and the concrete dam body aspect also seldom.Yet there is the possibility that hydraulic fracture takes place in concrete dam body.Concrete gravity dam for example, height of dam has reached the 200m level, and arched concrete dam has reached the 300m level, and the concrete dam surface crack can occur inevitably in addition, all gives the condition that provides of waterpower splitting.
The hydraulic fracture problem of further investigation concrete dam dam body has certain significance.For example domestic gravity dam regulation and stipulation, gravity dam should satisfy no tension criterion and antiskid is stable.Have scholar's research to show, than the big Rod Dixon gravity dam of Switzerland (285m) design criteria, the gravity dam section of China's standard design is obviously little, analyzes reason, considers that with the former the factors such as water under high pressure splitting of high dam are relevant.
At present, existing scholar adopts concrete wedge shape splitting test specimen and columniform unstressed concrete sample that concrete hydraulic fracture problem is studied.Yet the hydraulic fracture problem of concrete component is complicated in the actual engineering.For example, concrete dam is because the influence of factors such as temperature, construction and concrete shrinkage, and there is the crack inevitably in the dam body surface, and crack various informative is like: horizontal joint, vertical seam etc.The residing operating mode in crack is also very complicated, like: unstressed seam, receive tooled joint, drawn seam etc.
In order further to study the hydraulic fracture problem of concrete component, need a kind of device of making concrete component high-pressure hydraulic splitting simulated experiment test specimen of design.
The utility model content
The purpose of the utility model is to improve the deficiency of prior art, and a kind of device of making concrete component high-pressure hydraulic splitting simulated experiment test specimen is provided, its test specimen of producing make simulation more accurately, experiment is simpler.
The technical scheme that addresses the above problem is: the device of this making concrete component high-pressure hydraulic splitting simulated experiment test specimen comprises that a punching block overlaps into the seam member with one; Become the seam member to comprise that a pair of rigidity becomes seam sheet, a fixed component and two water service pipes; A pair of rigidity become the seam sheet be last slice, sheet and have the gap that constitutes slit in the test specimen between them down; Article two, water service pipe is distinguished the communication gap and the external world, and two water service pipes are to comprise first water inlet pipe of first water inlet port, first transverse part and first vertical portion and second water inlet pipe that comprises second water inlet port, second transverse part and second vertical portion; The side towards the punching block inner chamber at fixed component fixedly mounts this to rigidity one-tenth seam sheet, and fixed component is fixedly connected with punching block.
Use the test specimen of the device making of the utility model to have the slit that is in communication with the outside; Through test specimen being carried out water filling pressurization experiment; The hydraulic pressure data of splitting under the water under high pressure are being born in the crack that can access in the concrete; Experimental technique is simple, but can be used for accurately simulating the hydraulic fracture of concrete component under the tension and compression state.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 a is the synoptic diagram that applies pulling force when carrying out concrete component high-pressure hydraulic splitting simulated experiment under the tension state;
Fig. 1 b is the synoptic diagram of exerting pressure when carrying out concrete component high-pressure hydraulic splitting simulated experiment under the pressured state;
Fig. 2 is the structural representation of device of the making concrete component high-pressure hydraulic splitting simulated experiment test specimen of the utility model;
Fig. 2 a is the local structure for amplifying synoptic diagram of a portion of Fig. 2;
Fig. 2 b is the local structure for amplifying synoptic diagram of the b portion of Fig. 2.
Embodiment
Shown in each accompanying drawing, the device of this making concrete component high-pressure hydraulic splitting simulated experiment test specimen comprises that a punching block 20 overlaps into the seam member with one; Said one-tenth seam member comprises that a pair of rigidity becomes seam sheet, a fixed component 28 and two water service pipes; A pair of rigidity become the seam sheet be last slice 21, sheet 22 and have the gap that constitutes slit in the test specimen between them down; Article two, water service pipe is distinguished the communication gap and the external world, and two water service pipes are to comprise first water inlet pipe of first water inlet port 12, the first transverse part 12a and first vertical portion 24 and second water inlet pipe that comprises second water inlet port 13, the second transverse part 13a and second vertical portion 25; The side towards the punching block inner chamber at fixed component fixedly mounts this to rigidity one-tenth seam sheet, and fixed component is fixedly connected with punching block.
Preferably, punching block 20 is the cylindrical shape punching block that an end is uncovered and the other end seals.
Preferably, fixed component 28 is a round plate that diameter is identical with the punching block internal diameter.
Preferably, below fixed component, be provided with supporting member 281.
Preferably, last slice 21, sheet 22 all is circular steel discs down; Last slice 21 with following sheet 22 parallel placements, annular gasket 31 is established in the centre; On following sheet 22, be provided with two holes and be communicated with said gap, first vertical portion 24 links to each other with two holes respectively with second vertical portion 25, and the first transverse part 12a links to each other with the external world respectively with the second transverse part 13a; Last slice 21 assembling along its normal to a surface direction detachablely and fixing with following sheet 22 along its surperficial tangential direction.
Preferably, last 21 with following sheet 22 facing surfaces on a protruding back-up block 30 is set, the pit that a sectional area with protruding back-up block matees is set on the correspondence position of following sheet 22, protruding back-up block 30 is plugged in the pit.
Preferably, detachable ground skyhook 27 on fixed component.Perhaps, punching block also comprises a upper top cover 29, and anchor pole 27 is set on this upper top cover detachablely.
Preferably, outside two water service pipes, be with a stay pipe 23.
Preferably, on fixed component, also be provided with channel part 26, it surrounds first vertical portion 24, second vertical portion 25, the first transverse part 12a, the second transverse part 13a, stay pipe 23.
Provide two embodiment of concrete component high-pressure hydraulic splitting simulated experiment below.
Embodiment 1:
What present embodiment was described is concrete component high-pressure hydraulic splitting simulated experiment method for designing and device under the tension state.
(1) preparation of concrete sample
The cylindrical full grating concrete sample 2 of preparation
; The preset circular crack 1 that is parallel to upper and lower bottom surface in the middle of the test specimen; The diameter 150mm in crack; Thick about 1～3mm, preferred 2mm.Experimental principle figure is shown in Fig. 1 a.Need to prove that test specimen length is greater than 1m, and the crack is arranged on the middle part of test specimen length, thereby makes near the influence that concentrated by two ends stress the crack.Can also in test specimen, form crack perpendicular to bottom surface on the test specimen or inclination.The crack also can be a non-circular shape.
The device of making test specimen comprises that the cylinder punching block 20 and of
overlaps into the seam member, shown in Fig. 2, Fig. 2 a.Become the seam member to comprise that mainly thick round plate 28 (being said fixed component) becomes seam steel disc 21,22 (being said one-tenth seam part) with two.Become the seam member also to comprise some ancillary items: water inlet pipe and water outlet pipe 12a, 13a, 24,25, channel part 26, anchor pole 27 and stay pipe 23 etc.
Concrete, 1. following～5. individual main points that one-tenth stitches being manufactured with of member:
1.. the core that becomes the seam member is two and becomes seam steel disc 21,22, requires them can freely separate along the normal direction on steel disc surface, radially is that its surperficial tangential can not be moved each other along steel disc, and guarantees to form between the steel disc the thick circle seam of about 1～3mm.
Concrete, the steel disc of two diameter 150mm of cutting is as steel disc 21 and steel disc 22.On steel disc 22, punch two limberss.Two steel discs are parallel folded mutually, on two steel disc facing surfaces, a protruding back-up block 30 are set on the steel disc 21 wherein; A pit is set on the correspondence position of steel disc 22; Back-up block 30 can be plugged in the pit, twenty percent seam steel disc radially can not be moved each other, and can freely separate along normal direction.Only, preferably, become seam steel disc 21,22 parallel stacking then with the thick scraps of paper of the sticking circle 1～3mm of 502 glue at the thick pads 31 of the sticking circle 1～3mm of steel disc 22 peripheries, between form the thick circle of 1～3mm and stitch, shown in Fig. 2 b.
2.. a channel part 26 that wherein has two passages spaced apart from each other.The effect of channel part 26 is to connect to lead to the water inlet pipe and water outlet pipe 24,25 of steel disc 22, and the water inlet pipe and water outlet pipe 12a, the 13a that lead to the test specimen outside, and stay pipe 23.With screw 16 channel part 26 is connected on the side of thick round plate 28 (being said fixed component), like Fig. 2 a.
3.. stay pipe 23, one of which end are fixed on the said channel part 26, and the mouth of pipe of this stay pipe 23 covers each port of two said passages on the said channel part 26.Stay pipe 23 other ends become seam steel disc 22 to connect firmly with said, and this end mouth of pipe covers two limberss on the said one-tenth seam steel disc 22.Stay pipe adopts steel pipe.
4.. in stay pipe 23, be provided with two water pipes, promptly water inlet pipe and water outlet pipe 24,25, and the two ends of every connecting pipe connect on the seam steel disc 22 hole on the limbers and channel part 26 respectively.Add water inlet pipe and water outlet pipe 12a, 13a, thus, the passage that the said gap that the formation steel disc is 21,22 is in communication with the outside.Inject of a line portals for example mouth of pipe 12 entering of water pipe 12a of the water in crack from channel part; Get into two steel discs 21, gap (being in the preset crack of concrete sample) between 22 through connecting pipe 24 again, the draining in crack can be discharged from the mouth of pipe 13 of water pipe 25,13a.
5.. shown in Fig. 2 a, the diameter of thick round plate 28 and punching block internal diameter coupling, middle part thereunder sets firmly a supporting member 281, makes fixed component for example be location, 70mm place apart from punching block base plate one intersegmental distance.In the perforation of the periphery of steel plate 28, axisymmetric some anchor poles 27 are set, anchor pole is fixed through nut, and this nut is arranged in the gap between steel plate 28 and the punching block base plate.Upper top cover 29 (as shown in Figure 2) is set in the another port of punching block 20, also is provided with some anchor poles 27 on this upper top cover 29, and be that anchor pole 27 on the circular steel plate 28 is corresponding with fixed component.After processing test specimen, all anchor poles all are cemented in the test specimen, are used for connecting adding machine drawing and applying permanent pulling force.As shown in Figure 2.
Be placed into the seam member, like Fig. 2.After becoming seam steel disc 21 to overlay on 22, grout gets into 21 and 22 crack in order to prevent to pour into a mould, and the periphery illiteracy coverture in the crack for example can be 3～4 layers of newspaper.As the entery and delivery port of test specimen, the port of water pipe 12,13 is used rubber belt sealing, prevents that foreign material from getting into.To become the seam member, put into punching block 20 bottoms.Because the diameter of thick round plate 28 and punching block internal diameter coupling so become the seam member to fix preferably with the cylinder punching block, need not other fixation.
Deposit concrete, and carefully vibrate.Treat punching block water fill with after, the loam cake 29 that will have an anchor pole with iron hammer is at once pounded in the concrete, and is as shown in Figure 2.
On-the-spot in cast, also to use identical some fissureless test specimens of concrete preparation, its volume is less, adapts with common cupping machine, is used for the measurement of mechanical performance of concrete.
After a week is left standstill in the test specimen original place, form removal, whether the crack water-in and water-out of test test specimen are smooth and easy.After confirming that water flowing is smooth and easy, the entery and delivery port shutoff is protected.Be coated with one deck butter on the screw of anchor pole 27, carry out corrosion protection.Test specimen carefully is transported to fog room, maintenance to the corresponding length of time.
(2) experiment installation process
Test specimen is installed in adds in the machine drawing.The port one 2 of water pipe 12a or 13a is connected with the hydraulic pressure pressue device with port one 3.Start the hydraulic pressure pressue device, red ink is filled in the crack in test specimen, treat that air in the test specimen arrange after, stop water-filling, seal water delivering orifice.Begin experiment.
(4) hydraulic pressure pressure process
Add machine drawing test specimen is applied permanent pulling force, shown in Fig. 1 a, value of thrust is confirmed by requirement of experiment.Apply high hydraulic pressure in the crack, hydraulic pressure adopts the step pressuring method.Whole process examines the test specimen surface and has or not and leak, and manometric reading has or not rapid drawdown, and judges in view of the above whether hydraulic fracture takes place.The mxm. that tensimeter can reach is a splitting hydraulic pressure.
What present embodiment was described is concrete component water under high pressure splitting simulated experiment method for designing and device under the pressured state.
(1) experiment installation process
The cylindrical full grating concrete sample of preparation
; The preset circular crack that is parallel to upper and lower bottom surface in the middle of the test specimen; The diameter 150mm of seam, thick about 1～3mm.The structure of test specimen and embodiment 1 are basic identical, and the preparation process of test specimen is also basic identical.Difference is, does not comprise loam cake 29 in the device of preparation test specimen, and skyhook 27 need not to hole on the thick round plate 28 (being said fixed component); During deposit concrete, punching block waters floating the getting final product in full back, need not to add a cover 29.
(2) experiment installation process
Test specimen is installed on the press.Connect inlet tube and outlet tube, start the hydraulic pressure pressue device, in test specimen, fill red ink, treat that air in the test specimen arrange after, stop water-filling, seal water delivering orifice.Begin experiment.
(3) hydraulic pressure pressure process
During experiment, test specimen is installed on the press, press applies constant pressure to test specimen, and shown in Fig. 1 b, force value is confirmed by requirement of experiment.Apply high hydraulic pressure in the crack, hydraulic pressure adopts the step pressuring method.Whole process examines the test specimen surface and has or not and leak, and manometric reading has or not rapid drawdown, and judges in view of the above whether hydraulic fracture takes place.The mxm. that tensimeter can reach is a splitting hydraulic pressure.
In order to record the splitting hydraulic pressure under the situation of various cracks, the crack in the test specimen can be the transversal crack like embodiment 1 and embodiment 2, also can be longitudinal crack, can also be oblique crackle.Make the crackle of various directions, only need to become to stitch vergence direction between member and the fixed component and be set at required angle and get final product.
A kind of device of making concrete component high-pressure hydraulic splitting simulated experiment test specimen, its test specimen of producing make simulation more accurately, experiment is simpler.The device of this making concrete component high-pressure hydraulic splitting simulated experiment test specimen comprises that a punching block overlaps into the seam member with one; Become the seam member to comprise that a pair of rigidity becomes seam sheet, a fixed component and two water service pipes; A pair of rigidity become the seam sheet be last slice, sheet and have the gap that constitutes slit in the test specimen between them down; Article two, water service pipe is distinguished the communication gap and the external world, and two water service pipes are to comprise first water inlet pipe of first water inlet port, first transverse part and first vertical portion and second water inlet pipe that comprises second water inlet port, second transverse part and second vertical portion; The side towards the punching block inner chamber at fixed component fixedly mounts this to rigidity one-tenth seam sheet, and fixed component is fixedly connected with punching block.
Claims (10)
1. make the device of concrete component high-pressure hydraulic splitting simulated experiment test specimen, it is characterized in that:
Comprise that a punching block (20) overlaps into the seam member with one;
Become the seam member to comprise that a pair of rigidity becomes seam sheet, a fixed component (28) and two water service pipes;
It is last slice (21), sheet (22) and have the gap that constitutes slit in the test specimen between them down that a pair of rigidity becomes the seam sheet; Article two, water service pipe is distinguished the communication gap and the external world, and two water service pipes are to comprise first water inlet pipe of first water inlet port (12), first transverse part (12a) and first vertical portion (24) and second water inlet pipe that comprises second water inlet port (13), second transverse part (13a) and second vertical portion (25); The side towards the punching block inner chamber at fixed component fixedly mounts this to rigidity one-tenth seam sheet, and fixed component is fixedly connected with punching block.
2. device according to claim 1 is characterized in that: punching block (20) is the cylindrical shape punching block that an end is uncovered and the other end seals.
3. device according to claim 1 is characterized in that: fixed component (28) is a round plate that diameter is identical with the punching block internal diameter.
4. device according to claim 3 is characterized in that: below fixed component, be provided with supporting member (281).
5. device according to claim 1 is characterized in that: last slice (21), sheet (22) all is circular steel discs down; Last slice (21) and the parallel placement of following sheet (22), pad (31) is established in the centre; On following sheet (22), be provided with two holes and be communicated with said gap, first vertical portion (24) links to each other with two holes respectively with second vertical portion (25), and first transverse part (12a) links to each other with the external world respectively with second transverse part (13a); Last slice (21) and following sheet (22) are assembling along its normal to a surface direction detachablely, and are fixing along its surperficial tangential direction.
6. device according to claim 5; It is characterized in that: on last (21) and following sheet (22) facing surfaces, a protruding back-up block (30) is set; The pit that a sectional area with protruding back-up block matees is set on the correspondence position of following sheet (22), and protruding back-up block (30) is plugged in the pit.
7. according to the described device of one of claim 1 to 6, it is characterized in that: detachable ground skyhook (27) on fixed component.
8. according to the described device of one of claim 1 to 6, it is characterized in that: punching block also comprises a upper top cover (29), and anchor pole (27) is set on this upper top cover detachablely.
9. device according to claim 1 is characterized in that: outside two water service pipes, be with a stay pipe (23).
10. device according to claim 9 is characterized in that: on fixed component, also be provided with channel part (26), it surrounds first vertical portion (24), second vertical portion (25), first transverse part (12a), second transverse part (13a), stay pipe (23).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203977513U CN202339294U (en) | 2011-10-18 | 2011-10-18 | Device for manufacturing test piece for carrying out simulated experiment on high-pressure hydraulic fracture of concrete member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203977513U CN202339294U (en) | 2011-10-18 | 2011-10-18 | Device for manufacturing test piece for carrying out simulated experiment on high-pressure hydraulic fracture of concrete member |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841020A (en) * | 2012-09-06 | 2012-12-26 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN103389249A (en) * | 2013-07-18 | 2013-11-13 | 河海大学 | Device and method for clay core wall hydraulic fracturing experiments |
| CN104792621A (en) * | 2015-04-21 | 2015-07-22 | 山东大学 | System and method for monitoring multiple precursory information of rock sample breaking |
| CN110243688A (en) * | 2019-05-09 | 2019-09-17 | 中国水利水电科学研究院 | Dry concrete hydraulic fracture test specimen and implementation method |
| CN110987634A (en) * | 2019-11-15 | 2020-04-10 | 河海大学 | Test device and test method for hydraulic fracture of gravel-doped core wall |
-
2011
- 2011-10-18 CN CN2011203977513U patent/CN202339294U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841020A (en) * | 2012-09-06 | 2012-12-26 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN102841020B (en) * | 2012-09-06 | 2015-06-10 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN103389249A (en) * | 2013-07-18 | 2013-11-13 | 河海大学 | Device and method for clay core wall hydraulic fracturing experiments |
| CN103389249B (en) * | 2013-07-18 | 2015-08-05 | 河海大学 | A kind of clay core wall Hydraulic fracturing test device and test method |
| CN104792621A (en) * | 2015-04-21 | 2015-07-22 | 山东大学 | System and method for monitoring multiple precursory information of rock sample breaking |
| CN110243688A (en) * | 2019-05-09 | 2019-09-17 | 中国水利水电科学研究院 | Dry concrete hydraulic fracture test specimen and implementation method |
| CN110243688B (en) * | 2019-05-09 | 2020-12-01 | 中国水利水电科学研究院 | Hydraulic fracture test piece for dry and hard concrete and implementation method |
| CN110987634A (en) * | 2019-11-15 | 2020-04-10 | 河海大学 | Test device and test method for hydraulic fracture of gravel-doped core wall |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20121018 |