CN203881626U - Tri-axial compression test system for rock masses - Google Patents
Tri-axial compression test system for rock masses Download PDFInfo
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- CN203881626U CN203881626U CN201420311698.4U CN201420311698U CN203881626U CN 203881626 U CN203881626 U CN 203881626U CN 201420311698 U CN201420311698 U CN 201420311698U CN 203881626 U CN203881626 U CN 203881626U
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- ring
- steel plate
- shaped
- examination body
- rubber capsule
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- 239000011435 rock Substances 0.000 title claims abstract description 27
- 238000012669 compression test Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 239000002775 capsule Substances 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a tri-axial compression test system for rock masses. The tri-axial compression test system comprises axial loading equipment and lateral loading equipment which are used for testing strength of a cylindrical specimen, wherein the axial loading equipment consists of a bearing plate, a hydraulic lifting jack, a joint variable steel plate, a force transmission column and a steel base plate which are superposed from bottom to top in sequence on the top surface of the cylindrical specimen; a ring-shaped slot is formed around the cylindrical specimen, and the depth of the ring-shaped slot is equal to the height of the cylindrical specimen; the lateral loading equipment comprises a ring-shaped rubber capsule sleeving the peripheral surface of the cylindrical specimen and a ring-shaped steel plate for sealing the ring-shaped slot; a plurality of displacement sensors are symmetrically arranged on the bearing plate; a water filling tube and an exhaust tube of the ring-shaped rubber capsule are respectively guided out of a penetrating hole in the ring-shaped steel plate, and are correspondingly communicated with a water outlet and an exhaust valve of a high-pressure water pump. According to the utility model, the ring-shaped rubber capsule is used to replace existing multiple lifting jacks or hydraulic pillows for applying lateral load onto the specimen, so that the time for a tri-axial compression test time on rock masses is shortened, the working efficiency is improved, and the test expense is lowered.
Description
Technical field
The utility model relates to rock mass triaxial compression test, especially relates to rock mass triaxial compression test system.
Background technology
The rock mass of the ground of buildings, underground chamber and tunnel surrounding in hydraulic engineering construction, generally in three-dimensional stress state, and mechanical properties of rock is conventionally relevant with stress state of living in.Therefore, under three-dimensional stress state, measure the rock mass strength of ground, underground chamber and the tunnel surrounding of buildings, should carry out " rock mass triaxial compression test " according to the specification of " Hydraulic and Hydro-Power Engineering rock test code " (SL264-2001).
At present, carry out above-mentioned test, the preparation of examination body (test specimen) is dug rock mass by artificial (stonemason) downwards at Test Tunnel base plate and is completed, it is foursquare cylinder that the examination body of preparation adopts section, the length of side is not less than 30cm, is highly 2.0～2.5 times of the length of side, and every group of examination body should not be less than 5.When preparation, adopt and manually cut a hole into the examination body of described size downwards at experimental flat cavity base plate, and the requirement of excavating examination body surrounding basement rock and make to try body surrounding space and meet side direction loading facilities (many lifting jack or flat jack) and personnel's fitting operation, then installation side to, axially loading facilities and surveying instrument carry out rock mass triaxial compression test.Rock mass triaxial compression test belongs to the super-huge test of Test in Situ class, and in order to meet, equipment is installed and the needs of personnel operation, and this test need to have the Test Tunnel of large-size and try enough large spaces of body periphery, and this just causes Test in Situ excavated volume larger; Due to the heavy reason such as side direction loading facilities and loaded down with trivial details installation method, the difficulty that this test is implemented is very large, and it is more that personnel drop into, and not only process time is long but also expense is also very high.Many Geotechnical Engineerings were wanted to do but have to abandon rock mass triaxial compression test in prospecting and construction stage in view of the foregoing.
Summary of the invention
The utility model object is to provide a kind of rock mass triaxial compression test system.
For achieving the above object, the utility model is taked following technical proposals:
Rock mass triaxial compression test system described in the utility model, comprises axial loading facilities and side direction loading facilities for measuring cylindrical strength of test block; Described axial loading facilities is made up of the bearing plate, hydraulic jack, change joint steel plate, force-transmitting pole, the billet that are stacked in successively described cylindrical examination body end face from bottom to top; Described hydraulic jack liquid inlet and outlet is communicated with by the going out of pipeline and high-pressure oil pump, inlet respectively; Be provided with ring groove around described cylindrical examination body, the degree of depth of described ring groove equals the height of cylindrical examination body; Described side direction loading facilities comprises: be set in the ring-shaped rubber capsule of the external side face of described cylindrical examination, the height of described ring-shaped rubber capsule equals the height of cylindrical examination body; For sealing the doughnut-shaped steel plate of described ring groove, the annular distance diameter of described doughnut-shaped steel plate equals the diameter of cylindrical examination body and external diameter is greater than the diameter of ring groove, is symmetrically installed with multiple displacement transducers on bearing plate; The charging pipe of described ring-shaped rubber capsule and gas outlet are drawn respectively the perforation being opened on described doughnut-shaped steel plate, and are connected with corresponding high-pressure hydraulic pump water delivering orifice and vent valve.
The utility model advantage is to adopt ring-shaped rubber capsule to substitute existing many lifting jack or flat jack applies lateral load to examination body, solved existing side direction exert pressure the loaded down with trivial details installation of equipment, debugging, need the problem of larger installing space, greatly shorten the time of rock mass triaxial compression test, improve work efficiency, reduced testing expenses.
Brief description of the drawings
Fig. 1 is arrangement schematic diagram of the present utility model.
Fig. 2 is that cylindrical examination body described in the utility model is placed in the layout schematic diagram in ring groove.
Fig. 3 is the plan structure schematic diagram of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As Figure 1-3, rock mass triaxial compression test system described in the utility model, comprises axial loading facilities and side direction loading facilities for measuring cylindrical examination body 3 intensity; Described axial loading facilities is made up of the bearing plate 11, hydraulic jack 12, change joint steel plate 13, force-transmitting pole 14, the billet 15 that are stacked in successively described cylindrical examination body 3 end faces from bottom to top; Described hydraulic jack 12 liquid inlet and outlet are communicated with by the going out of pipeline and high-pressure oil pump 17, inlet respectively; Be provided with ring groove 4 around described cylindrical examination body 3, the degree of depth of described ring groove 4 equals the height of cylindrical examination body 3; Described side direction loading facilities comprises: be set in the ring-shaped rubber capsule 6 of described cylindrical examination body 3 outer peripheral faces, the height of described ring-shaped rubber capsule 6 equals the height of cylindrical examination body 3; For sealing the doughnut-shaped steel plate 7 of described ring groove 4, the annular distance diameter of described doughnut-shaped steel plate 7 equals the diameter of cylindrical examination body 3 and external diameter is greater than the diameter of ring groove 4, uniform on doughnut-shaped steel plate 74 displacement transducers 18 is installed; The charging pipe of described ring-shaped rubber capsule 6 and gas outlet are drawn respectively the perforation being opened on described doughnut-shaped steel plate 7, and are connected with corresponding high-pressure hydraulic pump 8 water delivering orifices and vent valve 9.
The utility model principle of work is summarized as follows:
As Figure 1-3, first adopt the method for explosion on massif, to excavate the experimental flat cavity 1 of high 2m, a wide 2m; Then carry out the preparation of cylindrical examination body 3 and ring groove 4.While preparing cylindrical examination body 3 and ring groove 4, first on the basement rock of experimental flat cavity 1 base plate face 2 behind optional test position, adopting diameter of bore by rig is 32cm(external diameter 32.5 cm) hollow boring bit creep into for the first time vertically downward, drilling depth 75cm for the first time, then changing external diameter is 72cm(diameter of bore 70cm) hollow boring bit creep into for the second time downwards in position, described drilling depth for the second time equals drilling depth for the first time, and creeps into for twice as concentric bore, adopt electric pick or pneumatic pick to reject the rock mass between the annulus creeping into for the first time and the annulus creeping into for the second time, as shown in Figure 2,3, forming diameter D is the examination body 3 that 32cm, height H are 75cm, and form around the width of this examination body 3 is the ring groove 4 that 20cm, the degree of depth are 75cm simultaneously, so far complete the preparation of examination body 3 and ring groove 4, with digital camera, examination body 3 end faces and surrounding taken pictures and made geologic description, then carrying out the installation of side direction loading facilities: first building 5cm solid cement slurry 5 in ring groove 4 bottoms, ensure that examination body meets specified altitude and grout 5 surfacings, the ring-shaped rubber capsule 6 after grout 5 solidifies, shape and size and ring groove 4 being adapted is inserted on examination body 3 outer peripheral faces, then equal to try body 3 diameters by the thick doughnut-shaped steel plate 7((internal diameter of 5cm, external diameter is greater than ring groove 4 diameter 10cm) ring groove 4 is sealed, and by the charging pipe of ring-shaped rubber capsule 6, gas outlet is drawn from the reserved perforation of doughnut-shaped steel plate, respectively with high-pressure hydraulic pump 8, vent valve 9 is communicated with on the rear basement rock that with anchor bolt 10, doughnut-shaped steel plate 7 is fixed on to experimental flat cavity base plate face 2 (anchor force should not be less than 1.5 times of lateral stress), like this, can to the interior water-filling of ring-shaped rubber capsule 6, it be expanded by high-pressure hydraulic pump 8 and form the lateral stress that examination body 3 is applied, finally carry out axial loading facilities installation: at described examination body 3 end faces stacked installation bearing plate 11 successively from lower to upper, hydraulic jack 12, become joint steel plate 13, force-transmitting pole 14, billet 15, then between billet 15 and experimental flat cavity 1 roof, fill sand-cement slurry 16, described hydraulic jack 12 is entered, liquid outlet is going out by pipeline and high-pressure oil pump 17 respectively, inlet is communicated with, after the sand-cement slurry 16 of filling is solidified, by hydraulic jack 12 suitably pressurization make in axial loading facilities between all parts in conjunction with well stable with keeping system, finally 4 displacement transducers 18 of symmetrical installation on bearing plate 11, so far complete the installation of axial loading facilities, can require to carry out rock mass triaxial compression test according to technical manual " Hydraulic and Hydro-Power Engineering rock test code " (SL264-2001).
The heavy lifting jack that the utility model uses with the alternative conventional test of ring-shaped rubber capsule 6 or flat jack and support equipment are as side direction loading facilities, and the very easy installation of ring-shaped rubber capsule 6 has replaced the loaded down with trivial details fitting operation of existing side direction loading facilities, make becoming of complicated rock mass triaxial compression test simple and easy to operate.Adopt ring-shaped rubber capsule 6 to apply lateral load to examination body, because ring-shaped rubber capsule 6 is intactly wrapped in the outer peripheral face that tries body 3, and both are flexible contacts, directly exert pressure, thereby ensure that examination body 3 side direction confined pressures are stressed evenly, having solved existing test, to adopt many lifting jack or flat jack parallel connection to apply the existing stressed uniform property of lateral pressure poor, side direction loading facilities is installed loaded down with trivial details, need larger installing space, discontinuity forms couple and produces the deficiency of deflection, also after having avoided existing side direction loading facilities to install, the initial stage need debug repeatedly simultaneously, adjust, the drawback that whole test period is extended.
Claims (1)
1. a rock mass triaxial compression test system, comprises axial loading facilities and side direction loading facilities for measuring cylindrical strength of test block; Described axial loading facilities is made up of the bearing plate, hydraulic jack, change joint steel plate, force-transmitting pole, the billet that are stacked in successively described cylindrical examination body end face from bottom to top; Described hydraulic jack liquid inlet and outlet is communicated with by the going out of pipeline and high-pressure oil pump, inlet respectively; It is characterized in that: be provided with ring groove around described cylindrical examination body, the degree of depth of described ring groove equals the height of cylindrical examination body; Described side direction loading facilities comprises: be set in the ring-shaped rubber capsule of the external side face of described cylindrical examination, the height of described ring-shaped rubber capsule equals the height of cylindrical examination body; For sealing the doughnut-shaped steel plate of described ring groove, the annular distance diameter of described doughnut-shaped steel plate equals the diameter of cylindrical examination body and external diameter is greater than the diameter of ring groove, is symmetrically installed with multiple displacement transducers on bearing plate; The charging pipe of described ring-shaped rubber capsule and gas outlet are drawn respectively the perforation being opened on described doughnut-shaped steel plate, and are connected with corresponding high-pressure hydraulic pump water delivering orifice and vent valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420311698.4U CN203881626U (en) | 2014-06-12 | 2014-06-12 | Tri-axial compression test system for rock masses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420311698.4U CN203881626U (en) | 2014-06-12 | 2014-06-12 | Tri-axial compression test system for rock masses |
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| Publication Number | Publication Date |
|---|---|
| CN203881626U true CN203881626U (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420311698.4U Expired - Lifetime CN203881626U (en) | 2014-06-12 | 2014-06-12 | Tri-axial compression test system for rock masses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881626U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749036A (en) * | 2015-04-01 | 2015-07-01 | 中国电建集团华东勘测设计研究院有限公司 | In-situ rock-mass mechanic test system and in-situ rock-mass mechanic test method |
| CN105547812A (en) * | 2016-01-20 | 2016-05-04 | 安徽理工大学 | Multifunctional conventional triaxial loading device |
-
2014
- 2014-06-12 CN CN201420311698.4U patent/CN203881626U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749036A (en) * | 2015-04-01 | 2015-07-01 | 中国电建集团华东勘测设计研究院有限公司 | In-situ rock-mass mechanic test system and in-situ rock-mass mechanic test method |
| CN105547812A (en) * | 2016-01-20 | 2016-05-04 | 安徽理工大学 | Multifunctional conventional triaxial loading device |
| CN105547812B (en) * | 2016-01-20 | 2018-02-23 | 安徽理工大学 | A kind of multi-functional normal triaxial loading device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee after: YELLOW RIVER ENGINEERING CONSULTING Co.,Ltd. Address before: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee before: YELLOW RIVER ENGINEERING CONSULTING Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20141015 |