CN103821127A - Novel high-pressure large-expansion quantity pressure gauge detector with slidable end part - Google Patents
Novel high-pressure large-expansion quantity pressure gauge detector with slidable end part Download PDFInfo
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- CN103821127A CN103821127A CN201410089659.9A CN201410089659A CN103821127A CN 103821127 A CN103821127 A CN 103821127A CN 201410089659 A CN201410089659 A CN 201410089659A CN 103821127 A CN103821127 A CN 103821127A
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Abstract
A novel high-pressure large-expansion quantity pressure gauge detector with a slidable end part comprises a central shaft, a die rubber outer film sleeve, a die rubber inner film sleeve, elastic protection steel sheets, slidable fixing members, a water-air pipeline and a fast joint. The die rubber inner film sleeve is sleeved on the central shaft and two ends of the die rubber inner film sleeve are compressed and sealed to form a water cavity together with the central shaft; the die rubber router film sleeve is sleeved on the central shaft and is positioned at the outer layer of the die rubber inner film sleeve; two ends of the die rubber outer film sleeve are sealed by the slidable fixing members; the central shaft, the die rubber outer film sleeve and the slidable fixing members form an air cavity. The air pipes and water pipes in the water-air pipeline and the fast joint are respectively communicated with the air cavity and the water cavity. The elastic protection steel sheets are uniformly arrayed and arranged on the die rubber outer film sleeve in a laminating mode. The elastic protection steel sheets are fixed by telescopic hoops. The novel high-pressure large-expansion quantity pressure gauge detector with the slidable end part can be used for measuring the limitation pressure, can ensure that the successful rate of the experiment to be above 90%, can be widely applied to the in-situ testing of various rock and earth masses, and has well promotion and application prospects.
Description
Technical field
The present invention relates to rock-soil material tester technical field, specifically the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in a kind of end.
Background technology
Pressurementer test is one of in-situ testing method conventional in geotechnical engineering, is widely used in the prospecting and experimental study of Rock And Soil.The plant and instrument of pressurementer test is made up of pneumatic supply, engine control system, other probe and the connecting line etc. of pressing, its operating principle is: first to earth-boring to MTD, then use instead and be suitable for other drill bit of pressing probe size and drill through pressurementer test hole (being generally 1m left and right); Press probe to be installed in test hole on side, in popping one's head in to cylindrical other pressure by engine control system and connecting line, injected water is gentle, make other sand gravel layer of pressing probe expanding extruding periphery, and measure the relation curve of pressure and distortion, obtain contact, face blow pressure and limiting pressure and corresponding body becomes, calculate other pressing mold amount and the bearing capacity on stratum, and relational expression rule of thumb, compactness, intensity and deformation characteristic etc. to stratum are evaluated, as depicted in figs. 1 and 2.
Other press probe be rely on elastic caoutchouc Membrane cover bulging and to exerting pressure on stratum, therefore, require pressurementer test hole to meet: hole wall is smooth, aperture be slightly larger than other press probe and should not excessive etc. (aperture is crossed conference and is caused the body change that contact is corresponding too large, and other overall change of pressing probe is limited, because becoming to transfinite to record, body faces blow pressure or limiting pressure).
Rock And Soil refers to the stratum of natural sediment or the structure base manually filling, and generally comprises clay, silt, sand, sand gravel, rubble etc.; The coarse granule Rock And Soils such as coarse sand, sand gravel and rubble, need other double requirements of pressing probe to meet high pressure and large other bulk; Meanwhile, also should there is stronger safeguard function, can not in process of the test, occur the situation that die sleeve is punctured; To obtain smoothly complete pressurementer test achievement; Be elaborated as an example of channel sand gravel covering layer example below.
In Hydraulic and Hydro-Power Engineering is built, often run into the problem that need build dam on deep sand gravel covering layer, as: Tacheng, Jinsha jiang River (the maximum height of dam 305m of planning construction, sand gravel cover bed thickness reach 100m), Dadu River monkey rock (height of dam 223m, cover bed thickness 40～75m), (core-wall is seated on basement rock at two Jiangkou, maximum height of dam 314m, covers bed thickness and reaches 68m) etc.; This type of engineering construction need to be grasped the tectal physico mechanical characteristic of sand gravel in advance, just can carry out feasibility study and engineering design.Because sand gravel covering layer belongs to riverbed loose depos-its body, can not directly obtain undisturbed, need to determine its physico mechanical characteristic by in-situ testing method.The home position testing method of sand gravel layer has two kinds of pressurementer test and dynamic soundings; And the dynamic penetration test degree of depth exceedes after 20m, its achievement is subject to the impact of the long correction of bar, energy loss, particle size etc., cannot accurate quantitative analysis evaluation; Therefore, pressurementer test becomes unique feasible means of testing.
Sand gravel covering layer belongs to discrete particles accumulation body, while carrying out pressurementer test, and the following problem of ubiquity:
(1) it is bigger than normal that boring forms the aperture in pressurementer test hole, causes the body that contact is corresponding to become bigger than normal, and sand gravel is tectal faces blow pressure and limiting pressure is higher, thereby causing recording faces blow pressure and limiting pressure;
(2) hole wall in boring formation pressurementer test hole is not smooth, has more stony corner angle, in process of the test, can puncture other rubber membrane of pressing on probe, and cause test failure.
Existingly other press that probe has adopted that both sides are completely fixed, middle part is by the structural shape in elastic caoutchouc Membrane cover decomposition pressure chamber, on-the-spot great number tested data shows: in the time that other bulk reaches 500ml and chamber pressure and exceedes 1MPa, the intermediate location of Rubber membrane cover fixed end and middle part pressure chamber, can break because of the excessive bulging that produces of local elongation strain, cause test to be ended.
In sum, carry out pressurementer test in coarse granule Rock And Soil time, because of current other requirement of pressing probe can not adapt to high pressure and large other bulk, face blow pressure and limiting pressure and cannot record, the other pressing mold amount of maximum pressure estimation that can only rely on contact and apply; And rubber die sleeve is punctured phenomenon and occurs repeatedly, cause success of the test rate very low.
Summary of the invention
For the above-mentioned deficiency of prior art, the invention provides the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in a kind of end, the operating mode of this instrument energy simultaneous adaptation high pressure and large other swollen amount, can meet the test request of all kinds of Rock And Soils.
The object of the invention is to be achieved through the following technical solutions:
The other instrument the new detector of pressing of the large other bulk of the sliding high pressure in a kind of end, comprise central axis, the outer Membrane cover of mould glue, Membrane cover in mould glue, resilient protection steel disc, sliding fixture, aqueous vapor pipeline and snap joint, the interior Membrane cover of mould glue is set on central axis and two ends press seal and the central axis of the interior Membrane cover of mould glue form water cavity, the outer Membrane cover of mould glue is set on central axis and is positioned at mould glue Membrane cover skin, the two ends of the outer Membrane cover of mould glue seal by sliding fixture, central axis, the outer Membrane cover of mould glue and sliding fixture composition air cavity, aqueous vapor pipeline and snap joint comprise tracheae, water pipe and aqueous vapor snap joint, tracheae, water pipe is communicated with air cavity and water cavity respectively, mould glue adventitia puts evenly distributed and lamination resilient protection steel disc is installed, and resilient protection steel disc uses telescopic lock ring to be fixed.
In technique scheme, on central axis, be equipped with two interior Membrane cover snap rings, be set in the two ends of the internal mold rubber moulding cover on central axis respectively through described two interior Membrane cover snap rings, and interior Membrane cover snap ring is strained to both sides, by press seal between the inner membrance seal convexity on central axis and interior Membrane cover snap ring.
In technique scheme, described sliding fixture comprises end retainer ring, slipping block, slipping block dead ring, compresses snap ring, and at least twice rubber seal is installed on slipping block, and two slipping blocks penetrate respectively central axis two ends, with the outer Membrane cover overlap joint of mould glue; The inner side of slipping block is provided with the compression snap ring for compressing slipping block, the outer Membrane cover of mould glue and resilient protection steel disc, and at least twice rubber seal is set between slipping block and central axis, between the outer Membrane cover of slipping block and mould glue, establishes at least two seals projection; On slipping block, be provided with and the slipping block dead ring that compresses snap ring jam-packed, the outside of slipping block is provided with end retainer ring, gapless close contact between end retainer ring and slipping block dead ring.
In technique scheme, described compression snap ring adopts the lead angle of inside and outside anti-arc, and assurance resilient protection steel disc, can not produce and fracture because local distortion is excessive as protective in the time bearing pressure.
In technique scheme, described central axis is that anti-rust metal material is made.
In technique scheme, described resilient protection steel disc is arc, and quantity is 40-60 sheet, mutually overlaps after lamination is installed and forms sub-circular protective sleeve.
The both sides that the present invention is other presses instrument the new detector by fixed change into sliding, described sliding structure is sliding fixture, can and central axis between produce slippage, the gas that simultaneously guarantees air cavity can not compress between snap ring and spill along central axis, slipping block and adventitia cover, and can bear pressure is 0-10MPa; And the outer Membrane cover of mould glue adopts many resilient protection steel disc laminations to install and protects, can prevent that stone corner angle from puncturing, and prevents that steel disc bending from fractureing; More than the other bulk of other pressure probe can reach 1000ml.
In order to prove effect of the present invention, at the indoor proving test that carried out, mainly comprise that four directions interview tests, i.e. free wxpansion test, steel pipe pressure certification test, sand physical experiments and sand gravel physical experiments.
Free wxpansion test: the novel other probe of pressing is connected with the other instrument of pressing, carries out the free wxpansion test under the unconfined condition of outside, result of the test shows, the other other bulk of probe of pressing can reach 1000ml, and after release, other pressure is popped one's head in and can be returned to original state.
Steel pipe pressure certification test: press probe to be connected with the other instrument of pressing on side, and press probe to insert in the bigger steel pipe of external diameter on side, carry out applied voltage test; Result of the test shows, otherly presses sonde body to become to reach after 1000ml, and pressure increases to 10MPa gradually, and the other probe of pressing is without leaking gas leak phenomenon, and pressure stability is constant, and after removal pressure, the other probe of pressing returns to original state.
Sand physical experiments: at indoor making sand model, model casing is of a size of 1m × 1m × 1m, and sand relative density is 0.93; The other probe of pressing is placed in model center, is filled to gradually model end face according to relative density, covers mould cover, and applies the load of 300kPa, to simulate the stratum of the 15m degree of depth; Connect the other instrument of pressing, carry out the pressurementer test of sand physical model, as shown in Figure 4, the limiting pressure of this model is 1.27MPa to the curve of pressuremeter that test obtains, and corresponding body becomes 740ml.
Sand gravel physical experiments: at indoor making sand gravel model, model casing is of a size of 1m × 1m × 1m, and the relative density of sand gravel is 0.95; The other probe of pressing is placed in model center, is filled to gradually model end face according to relative density, covers mould cover, and applies the load of 400kPa, to simulate the stratum of the 20m degree of depth; Connect the other instrument of pressing, carry out the pressurementer test of sand gravel physical model, as shown in Figure 5, the limiting pressure of this model is 3.80MPa to the curve of pressuremeter that test obtains, and corresponding body becomes 935ml.
Above test result shows: this side presses probe to meet the test request of high pressure and large other bulk completely, solve a difficult problem for coarse-grained soil pressurementer test, not only can record limiting pressure, and success rate that can guarantee test is more than 90%, can be widely used in the in-situ test of all kinds of Rock And Soils, there is good promotion and application prospect.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of pressurementer test;
Fig. 2 is the typical curve of pressuremeter figure that pressurementer test obtains;
Fig. 3 is the other structural representation of pressing instrument the new detector of the large other bulk of the sliding high pressure in end of the present invention;
Fig. 4 uses the present invention's probe to carry out the curve of pressuremeter that sand model records;
Fig. 5 uses the present invention's probe to carry out the curve of pressuremeter that sand gravel model records.
In figure: 1-aqueous vapor pipeline and snap joint; 2-central axis; 3-air cavity; 4-water cavity; 5-end retainer ring; 6-slipping block; 7-slipping block dead ring; 8-compression snap ring; 9-rubber seal; 10-adventitia seal convexity; 11-resilient protection steel disc; The outer Membrane cover of 12-mould glue; 13-interior Membrane cover snap ring; 14-inner membrance seal convexity; Membrane cover in 15-mould glue.
The specific embodiment
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described.
Please refer to Fig. 3 and Fig. 4, the invention provides the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in a kind of end, comprise Membrane cover 15, protection steel disc 11, sliding fixture, aqueous vapor pipeline and snap joint 1 in central axis 2, the outer Membrane cover 12 of mould glue, mould glue.
Described sliding fixture comprises end retainer ring 5, slipping block 6, slipping block dead ring 7, compresses snap ring 8, and described compression snap ring 8 is for compressing slipping block 6, the outer Membrane cover 12 of mould glue and protection steel disc 11; At least twice rubber seal 9 is set between slipping block 6 and central axis 2; Between the outer Membrane cover 12 of slipping block 6 and mould glue, establish at least two seals projection 10.
Aqueous vapor pipeline and snap joint 1 comprise tracheae, water pipe and aqueous vapor snap joint, tracheae, water pipe are communicated with air cavity 3 and water cavity 4 respectively, be connected with aqueous vapor snap joint, can bear maximum pressure is 10MPa, guarantees that hydraulic pressure and air pressure can be applied to the other probe of pressing by test requirements document.Described air cavity 3 is made up of central axis 2, the outer Membrane cover 12 of mould glue and sliding fixture; Described water cavity 4 is made up of Membrane cover 15 in central axis 2, mould glue and interior Membrane cover snap ring 13.Described central axis 2 is made for anti-rust metal material, for example stainless steel, and 2 diameters of central axis can press the size of probe to determine according to side.
The other assembling process of instrument the new detector of pressing of the large other bulk of the sliding high pressure in end of the present invention is as follows:
(1) first step, interior Membrane cover snap ring 13 is penetrated to central axis 2, again internal mold rubber moulding cover 15 is penetrated to correspondence position on central axis 2, and internal mold rubber moulding is overlapped to 15 two ends through interior Membrane cover snap ring 13, and interior Membrane cover snap ring 13 is strained to both sides, by press seal between the inner membrance seal convexity 14 on central axis 2 and interior Membrane cover snap ring 13, along with pressure increases and more presses tighter;
(2) second step, penetrates central axis 2 by outer mould glue Membrane cover 12; At least twice rubber seal 9 is installed on slipping block 6, and two slipping blocks 6 are penetrated respectively to central axis 2 two ends, overlap with the outer Membrane cover 12 of mould glue; Evenly distributed resilient protection steel disc 11 and lamination are installed on the outer Membrane cover 12 of mould glue, after mutually overlapping lamination and installing, form sub-circular protective sleeve, be fixed with telescopic lock ring; Outside mould glue, in Membrane cover expansion process, can produce more flexiblely, and there will not be the disengaging of adjacent steel disc while the most substantially becoming, can the outer Membrane cover of mould glue be formed good protection and is not punctured;
(3) the 3rd steps, press probe both sides to install respectively for compressing Membrane cover 12 slipping block 6, mould glue outside and protecting the compression snap ring 8 of steel disc 11 on side; Slipping block dead ring 7 is installed on slipping block 6, and with compress snap ring 8 jam-packeds; Employing draws yard device to two side stretching slipping block dead rings 7, drives slipping block 6 to two side shiftings, drives adventitia seal convexity 10 to compress with compressing snap ring 8, in process of the test, along with pressure increases and more presses tighter; Compress the lead angle that snap ring 8 has adopted inside and outside anti-arc, assurance resilient protection steel disc 11, can not produce and fracture because local distortion is excessive as protective in the time bearing pressure;
(4) the 4th steps, mounting end retainer ring 5, to and slipping block dead ring 7 between gapless; Finally side is pressed the water and gas conduit of probe to be connected with the other instrument of pressing, can test.
Adopt this side to press probe to carry out the process of pressurementer test and tested basic identically in the past, key step is as follows:
(1) adopt rig hole to the tectal testing position of predetermined sand gravel, retaining wall can be carried out with sleeve pipe in top, then uses the drill bit matching with side pressure probe size instead, carries out test section boring, and carries out retaining wall with mud;
(2) side is pressed aqueous vapor pipeline and the other instrument of pressing of popping one's head in connect, and side pressure is popped one's head in and adopted and be threaded with drilling rod, utilize rig to press probe to put to the position of the interior predetermined test of holing on side; If there is a small amount of particulate blockage, can adopt the method for static pressure to be pressed into;
(3) adjust pressure reduction, and carry out pressurementer test by relevant Regulations, before test, should press probe to demarcate to side in advance;
(4) after off-test, side pressure probe is taken out, clean up, press probe again to demarcate to side, check its duty, for testing ready next time.
Claims (6)
1. the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in end, it is characterized in that: comprise central axis (2), the outer Membrane cover (12) of mould glue, Membrane cover (15) in mould glue, resilient protection steel disc (11), sliding fixture, aqueous vapor pipeline and snap joint (1), in mould glue, Membrane cover (15) is set in central axis (2) two ends press seal and central axis (2) upper and the interior Membrane cover (15) of mould glue and forms water cavity (4), the outer Membrane cover (12) of mould glue is set in central axis (2) above and is positioned at mould glue Membrane cover (15) skin, the two ends of the outer Membrane cover (12) of mould glue seal by sliding fixture, central axis (2), the outer Membrane cover (12) of mould glue and sliding fixture composition air cavity (3), aqueous vapor pipeline and snap joint (1) comprise tracheae, water pipe and aqueous vapor snap joint, tracheae, water pipe is communicated with air cavity (3) and water cavity (4) respectively, the outer Membrane cover (12) of mould glue above evenly distributed and lamination is provided with resilient protection steel disc (11), and resilient protection steel disc (11) uses telescopic lock ring to be fixed.
2. the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in end as claimed in claim 1, it is characterized in that: on central axis (2), be equipped with two interior Membrane cover snap rings (13), be set in the two ends of the internal mold rubber moulding cover (15) on central axis (2) respectively through described two interior Membrane cover snap rings (13), and interior Membrane cover snap ring (13) is strained to both sides, by press seal between the inner membrance seal convexity (14) on central axis (2) and interior Membrane cover snap ring (13).
3. the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in end as claimed in claim 1, it is characterized in that: described sliding fixture comprises end retainer ring (5), slipping block (6), slipping block dead ring (7), compresses snap ring (8), at least twice rubber seal (9) is installed on slipping block (6), two slipping blocks (6) penetrate respectively central axis (2) two ends, with outer Membrane cover (12) overlap joint of mould glue; The inner side of slipping block (6) is provided with the compression snap ring (8) for compressing slipping block (6), the outer Membrane cover (12) of mould glue and resilient protection steel disc (11), at least twice rubber seal (9) is set between slipping block (6) and central axis (2), between the outer Membrane cover (12) of slipping block (6) and mould glue, establishes at least two seals projection (10); On slipping block (6), be provided with and the slipping block dead ring (7) that compresses snap ring (8) jam-packed, the outside of slipping block (6) is provided with end retainer ring (5), gapless close contact between end retainer ring (5) and slipping block dead ring (7).
4. the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in end as claimed in claim 3; it is characterized in that: described compression snap ring (8) adopts the lead angle of inside and outside anti-arc; assurance resilient protection steel disc (11), can not produce and fracture because local distortion is excessive as protective in the time bearing pressure.
5. the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in end as claimed in claim 1, is characterized in that: described central axis (2) is made for anti-rust metal material.
6. the other instrument the new detector of pressing of the large other bulk of the sliding high pressure in end as claimed in claim 1, is characterized in that: described resilient protection steel disc (11) is arc, and quantity is 40-60 sheet, mutually overlaps after lamination is installed and forms sub-circular protective sleeve.
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| CN201410089659.9A CN103821127B (en) | 2014-03-12 | 2014-03-12 | Novel high-pressure large-expansion quantity pressure gauge detector with slidable end part |
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| CN201410089659.9A CN103821127B (en) | 2014-03-12 | 2014-03-12 | Novel high-pressure large-expansion quantity pressure gauge detector with slidable end part |
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| CN107121498A (en) * | 2017-06-23 | 2017-09-01 | 四川大学 | Fluid pressure type acoustic emission sensor device |
| CN107121696A (en) * | 2017-06-23 | 2017-09-01 | 四川大学 | Coupling pressure rock rupture acoustic monitoring system |
| CN107121695A (en) * | 2017-06-23 | 2017-09-01 | 四川大学 | Fluid pressure type acoustic monitoring system |
| CN110749504A (en) * | 2019-10-31 | 2020-02-04 | 三峡大学 | Partitioned lateral pressure creep test device for coral sand foundation and use method |
| CN111175125A (en) * | 2020-01-17 | 2020-05-19 | 安徽理工大学 | Coal rock tensile strength cracking experiment probe and assembly method |
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| CN111175125A (en) * | 2020-01-17 | 2020-05-19 | 安徽理工大学 | Coal rock tensile strength cracking experiment probe and assembly method |
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