CN103698215A - Pull-out test device for anchor cable - Google Patents
Pull-out test device for anchor cable Download PDFInfo
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- CN103698215A CN103698215A CN201310752075.0A CN201310752075A CN103698215A CN 103698215 A CN103698215 A CN 103698215A CN 201310752075 A CN201310752075 A CN 201310752075A CN 103698215 A CN103698215 A CN 103698215A
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Abstract
The invention discloses a pull-out test device for an anchor cable and belongs to the field of test equipment. The device comprises a pre-pressing device, a grouting device and a pull-out device, wherein the grouting device consists of a grouting pump and a slurry guide pipe with a side hole; the grouting pump is connected with the slurry guide pipe with the side hole; a soil cabin is arranged in the pre-pressing device; one end, with the side hole, of the slurry guide pipe of the grouting device is arranged in the soil cabin of the pre-pressing device; the pull-out device is arranged at the upper end of the pre-pressing device; an anchor cable of the pull-out device stretches into the soil cabin of the pre-pressing device through the slurry guide pipe of the grouting device. According to the device, the grouting device and the pull-out device are arranged on the pre-pressing device, slurry can be grouted into pressurized soil in the soil cabin of the pre-pressing device by the grouting device, and pull-out test can be performed by the pull-out device, so that two interfaces comprising the anchor cable and a grouting body as well as the grouting body and soil can be effectively simulated and research on interface parameters is facilitated. The device is simple in structure, convenient to use and accurate in test result.
Description
Technical field
The present invention relates to cable bolting technical field, particularly relate to a kind of anchor cable pull-out test device.
Background technology
At Geotechnical Engineering stream line support technologies such as foundation ditch, tunnel, mine working and side slopes, it is one of most important support pattern.The particularly appearance of prestress anchorage cable technology, by anchor cable is applied to prestress in advance, the body and produce the effect that friction resistance is realized reinforcing around between Rock And Soil of making to be in the milk, has solved the stable problem of a lot of complicacy Rock And Soils.But because the different soil layer of character is being deposited in China's different regions tax, as loess, frozen soil, weak soil etc., the mechanical property parameter difference of these Rock And Soil stream line anchoring sections is larger, so carry out the pull-out test of anchor cable in different soil, has important significance of scientific research.
A kind of bond anchorage pull-out test device of Huaqiao University's development at present, mainly comprises self-equilibrating pull-out test frame, load sensor and hydraulic piercing lifting jack.By being combined to form a self-equilibrating pull-out test frame by two steel boards and two groups of bolt link, and utilize load sensor and hydraulic piercing jack pair test specimen to carry out pull-out test.But this device is to determine confined pressure, can not realize the stress situation of simulation different depth soil layer.Also have a kind of confined pressure control type Micro-soil Nailing And Mini anchor rod drawing test unit, mainly comprise soil box mechanism, pressing mechanism and strain-type anchor rod drawing instrument.By the confined pressure of the adjustable soil box periphery of pressing mechanism, with strain-type motor, drive and carry out drawing operation.But this device do not consider locking after anchor rod drawing, loss that cannot Reality simulation situation lower prestress; Do not relate to the technical requirement of moving back anchor, traditional anchor that moves back is all that the measure such as take to knock or rock discharges prestress, easily the stressed of anchoring section is exerted an influence.
Above-mentioned small-sized anchor cable pull-out test device is substantially all simpler and easy, the operations such as slip casting, deep formation stress simulation and locking prestress can not be combined accurately, the problem of studying is also the response under single factors, many conditions operating mode under can not influencing each other to on-the-spot complicated, each factor is simulated, the result drawing has certain limitation, can not reflect truth.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of anchor cable pull-out test device, can simulate the stressing conditions of anchor cable and anchoring section under deep formation, thereby solve the problem that the many condition operating mode of existing apparatus under can not influencing each other to on-the-spot complicated, each factor simulated.
For solving the problems of the technologies described above, the invention provides a kind of anchor cable pull-out test device, comprising:
Prepressing device, grouting device and draw-off gear; Wherein,
Described grouting device is comprised of grouting pump and the slurry pipe of leading with side opening, and described grouting pump is connected with the described slurry pipe of leading with side opening;
In described prepressing device, be provided with soil body cabin;
Being arranged in the described soil body cabin of described prepressing device with side opening one end of pipe starched in leading of described grouting device;
Described draw-off gear is arranged on described prepressing device upper end, and the anchor cable of described draw-off gear extend in the soil body cabin of described prepressing device through the slurry pipe of leading of described grouting device.
Beneficial effect of the present invention is: by grouting device and draw-off gear are set on prepressing device, can be to the native internal injection of cabin pressurization in the prepressing device soil body through grouting device, by draw-off gear, carry out pull-out test, can effectively simulate anchor cable and grouting body, grouting body and these two kinds of interfaces of the soil body, be convenient to interface parameter research, not only can simulate the stressing conditions of anchor cable and anchoring section under deep formation, also can be used as the test platform of the correlativity problems such as slurries expanding, damage of soil body face.This apparatus structure is simple, easy to use, and experimental result is accurate.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The grouting device schematic diagram that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 arranges the anchor cable pull-out test device schematic diagram after draw-off gear for what the embodiment of the present invention provided;
The prepressing device schematic diagram that Fig. 3 provides for the embodiment of the present invention;
The schematic diagram that adds tamponade of the prepressing device that Fig. 4 provides for the embodiment of the present invention;
The schematic diagram of the gland bonnet of the prepressing device that Fig. 5 provides for the embodiment of the present invention;
The schematic diagram of the base plate of the prepressing device that Fig. 6 provides for the embodiment of the present invention;
The schematic diagram of leading slurry pipe of the grouting device that Fig. 7 provides for the embodiment of the present invention;
The schematic diagram of the draw-off gear of the draw-off gear that Fig. 8 provides for the embodiment of the present invention;
The schematic diagram of the locking ground tackle of the draw-off gear that Fig. 9 provides for the embodiment of the present invention;
The anchor cable of the draw-off gear that Figure 10 provides for the embodiment of the present invention is arranged on the schematic diagram in tension ground tackle and locking ground tackle;
The schematic diagram of the fixed bar of the draw-off gear that Figure 11 provides for the embodiment of the present invention;
The schematic diagram of the motion bar of the draw-off gear that Figure 12 provides for the embodiment of the present invention.
Embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
Fig. 1,2 is depicted as the embodiment of the present invention a kind of anchor cable pull-out test device is provided, and this device comprises: prepressing device 1, grouting device 2 and draw-off gear 3;
Wherein, grouting device 2 is comprised of grouting pump 21 and the slurry pipe 22 of leading with side opening, and grouting pump 21 is connected with the slurry pipe 22 of leading with side opening;
In prepressing device 1, be provided with soil body cabin 15;
Being arranged in the soil body cabin 15 of prepressing device with side opening one end of pipe 22 starched in leading of grouting device 2;
Draw-off gear 3 is arranged on prepressing device 1 upper end, and the anchor cable 31 of draw-off gear 3 extend in the soil body cabin 15 of prepressing device 1 through the slurry pipe 22 of leading of grouting device 3.
As shown in Fig. 1,3 to 6, in above-mentioned anchor cable pull-out test device, prepressing device 1 comprises: store up native case 11, base plate 13, add tamponade 12, O- ring seal 121,19, gland bonnet 14, air compressor 17 and a plurality of bracing boom 18;
Wherein, store up native case 11 and be arranged on base plate 13, gland bonnet 14 is arranged in the upper end open of the native case 11 of storage, stores up between gland bonnet 14 outside native case 11 and base plate 13 and connects by a plurality of bracing booms 18;
Add tamponade 12 and be arranged in the native case 11 of storage, adding in the storage soil case 11 of tamponade 12 belows is soil body cabin 15, and adding in the storage soil case 11 of tamponade 12 tops is compression chamber 16;
Be provided with O-ring seal 121 with the front end periphery that adds tamponade 12 that contacts of native case 11 inwalls of storage, add the rear end of tamponade and the gathering sill contact position of gland bonnet is provided with O-ring seal 19;
As shown in Figure 4, in above-mentioned prepressing device 1, add tamponade 12 and be provided with the through hole that connects cock body, add tamponade 12 peripheries and be provided with O-ring seal 121.
As shown in Figure 5, the gland bonnet 14 in above-mentioned prepressing device 1 is provided with bracing boom hole 124, as shown in Figure 6, is provided with bracing boom hole 131 on base plate 13, matches with the bracing boom hole 131 on base plate 13 in the bracing boom hole 124 on gland bonnet 14, and bracing boom 18 is installed.
As shown in Figure 7, in above-mentioned anchor cable pull-out test device, the slurry pipe 22 of leading with side opening of grouting device 2 is comprised of body (as shown in Figure 7) and side pipe 221;
On body, be furnished with size through hole 222 identical, that distribute symmetrically;
As shown in Figure 8, in above-mentioned anchor cable pull-out test device, draw-off gear 3 comprises:
Combined bearing support 32, centre-hole jack 33, backing plate 34, tension ground tackle 35, locking ground tackle 36 and surveying instrument 37;
Combined bearing support 32 is arranged on prepressing device 1, the top in prepressing device 1 top;
Centre-hole jack 33 is arranged on combined bearing support 32;
As shown in Figure 8, combinations thereof formula bearing support 32 comprises:
Pressure-bearing disk 324, at least three fixed bars 321, spacing disk 325, fixed disc 326 and at least six roots of sensation motion bar 322;
Wherein, each fixed bar 321 is uniformly set at prepressing device 1 periphery, is fixedly connected with prepressing device 1;
Pressure-bearing disk is arranged between the upper end of each fixed bar, and pressure-bearing disk is arranged on each fixed bar, and pressure-bearing disk middle part is provided with the through hole passing through for anchor cable;
Every fixed bar 321 upper ends arrange two motion bars 322,323, and motion bar 322,323 is fixedly connected with fixed bar 321;
Fixed disc 326 and spacing disk 325 are disposed between each motion bar from top to bottom, and fixed disc and spacing disk are arranged on each motion bar 322,323;
Fixed disc 326 and the middle fixedly limiting section of centre-hole jack 33 that is provided with of spacing disk 325, fixed disc 326 is provided with spacing disk 325 middle parts the through hole passing through for anchor cable 31.
As shown in figure 11, in combinations thereof formula bearing support 32, every fixed bar 321 is rectangular tube, its bottom is provided with plinth 3213, near prepressing device 1 one sides, be provided with and get stuck 3212, on fixed bar 321 inner sides of the same side, have two and get stuck 3212, by getting stuck, 3212 can block the bottom 13 of prepressing device 1 and the edge of gland bonnet 14, its upper end is provided with two plug-in mounting mouths, in each plug-in mounting mouth, equal motion bar of plug-in mounting 322,323, can fix each motion bar 322,323 by the screw 38 on fixed bar 321;
In combinations thereof formula bearing support 32, three fixed bar 321 inner sides are equipped with shelf bracket 3211, and pressure-bearing disk 324 is arranged on the shelf bracket of three fixed bar inner sides;
As shown in figure 12, each motion bar inner side is all interval with shelf bracket, and spacing disk and fixed disc are disposed on from top to bottom at least two motion bars and are fixedly installed on the shelf bracket inside each motion bar.Concrete, on two motion bars of the same side, each root motion bar inner side is equipped with shelf bracket, the setting of staggering up and down of shelf bracket on two motion bars of the same side, spacing disk 325 be arranged on motion bar 322 under shelf bracket on, fixed disc 326 be arranged on other motion bar 323 on upper shelf bracket.
The convenient combination of this combined bearing support 32 and dismounting.
As shown in Figure 9, in above-mentioned draw-off gear 3, locking ground tackle 36 comprises: ground tackle body 360, two arc cassette tapes 362 and cone-shaped clips 361;
Wherein, ground tackle body 360 is the annular solid being comprised of two semi-ring bodies, and the mesopore of annular solid is bellmouth 363, and the upper shed of bellmouth 363 is greater than under shed;
Cone-shaped clip 361 is comprised of two semi-ring cone-shaped bodys, and cone-shaped clip 361 is fastened in bellmouth from bottom to up;
Article two, arc cassette tape 362 spiral-locks are originally external at ground tackle, are fixedly connected with two semi-ring bodies of ground tackle body, as being connected by screw, two semi-ring bodies of ground tackle body are connected to whole annular solid.This locking ground tackle 36 is a kind of ground tackles that can be for convenience detach.
As shown in figure 10, in above-mentioned draw-off gear 3, tension ground tackle 35 structures are basically identical with locking ground tackle 36, comprising: ground tackle body, two arc cassette tapes and cone-shaped clip;
Wherein, ground tackle body is the annular solid being comprised of two semi-ring bodies, and the mesopore of annular solid is bellmouth, different from locking ground tackle 36, and the upper shed of this bellmouth is less than under shed (locking ground tackle is inverted and is tension ground tackle);
Cone-shaped clip is comprised of two semi-ring cone-shaped bodys, and cone-shaped clip is fastened in bellmouth from top to bottom;
Article two, arc cassette tape spiral-lock is originally external at ground tackle, is fixedly connected with two semi-ring bodies of ground tackle body, as being connected by screw, two semi-ring bodies of ground tackle body is connected to whole annular solid.This tension ground tackle is a kind of ground tackle that can be for convenience detach.
In above-mentioned draw-off gear 3, the position relationship of anchor cable 31, backing plate 34, tension ground tackle 35, locking ground tackle 36, fixed disc 326 and spacing disk 325 as shown in figure 10.
In above-mentioned draw-off gear 3, surveying instrument 37 adopts hollow load transducer.
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
As shown in Figure 1, 2, the anchor cable pull-out test device that the embodiment of the present invention provides is comprised of prepressing device 1, grouting device 2 and draw-off gear 3; Wherein prepressing device 1 is to describe compression chamber is set in device at transparent cylinder, the bottom soil body of banking up, utilize air compressor pressurization to produce vertical pressure to the soil body, then be scaled side limit confined pressure, to simulate the situation of change of slurry and Rock And Soil interphase mechanics parameter under the confined pressure of the different depth soil body.
Draw-off gear 3 is by centre-hole jack 33, detachable tension ground tackle 35 and locking ground tackle 36, cone-shaped clip 361, the compositions such as combined bearing support 32 and some surveying instruments 37, this draw-off gear 3 can be controlled size, make each parts match, sequentially after combination, when stretch-draw anchor, only have tension ground tackle to work, anchor cable retraction after stretch-draw pine anchor, locking ground tackle starts to work, finally by the arc cassette tape on ground tackle, can complete easily the anchor technology of moving back, whole process operation is simple, utilize combined bearing support also can oneself customize various combination scheme, conveniently realize the scientific research test of different research contents.Do not contain the anchor cable pull-out test device one-piece construction of grouting device as shown in Figure 2.
Prepressing device in above-mentioned test unit, it is a kind of vacuum prepressing device, this prepressing device is by high-pressure rubber pipe 171, gas to be depressed into the compression chamber 16 in model casing by extraneous air compressor 17, surrounding all seals, only leave a gas admittance valve 172, under the effect of air pressure, add tamponade 12 and move down the interior soil body in soil body cabin 15 is produced to certain pressure, by the confined pressure size being converted into, simulate the pressure on certain depth stratum.Concrete structure is as follows:
(1) prepressing device:
Air compressor and cylindrical model case form, cylindrical model case by base plate 13, store up native case 11, add tamponade 12, gland bonnet 14, a plurality of bracing boom 18 and O- ring seal 121,19 form, wherein, storing up native case 11 is cylindrical vessel, the mobile of the volume space of actual formation simulation the distortion that can observe stratum in slip casting process and slurries, adding tamponade is arranged in the native case of storage, utilizing air compressor to pressurize to realize exerts pressure to stratum, utilize bracing boom 18 by gland bonnet 14 and the native case 11 of storage, adding tamponade 12 is connected as a whole with base plate 13, and form a seal cavity (compression chamber 16), air compressor is pressed into pressurized air to realize the object of pressurization by gas admittance valve 172 in compression chamber 16, this prepressing device is whole to be illustrated as shown in Figure 3:
(11) Chu Tuxiang:
Storing up native case is thick 30mm, external diameter 500mm, and the cylindrical vessel of high 1000mm, stores up the spatial accommodation that native case forms whole experimental provision, is used for splendid attire experiment soil layer.
(12) add tamponade:
As shown in Figure 4, adding tamponade is that this installs main pressing element, and the simulation of upper soil horizon pressure is mainly applied to pressurization by pressurized air and realizes beyond the Great Wall.The edge beyond the Great Wall that pressurizes arranges twice O type rubber seal, gas between isolated pressurized air cabin and soil layer.Add tamponade middle part and be provided with through hole, lead slurry pipe and insert in the native case of storage and be connected with outside grouting pump by this through hole.
(13) gland bonnet:
As shown in Figure 5, gland bonnet 14 main bodys are circular slab, diameter is 700mm, be provided with bottom correspondence position the preformed hole that 8 diameters are 20mm, by bracing boom and base plate, be connected to integral body, gland bonnet middle part arranges a manhole, adds tamponade and moves up and down vertically by this through hole, this through-hole wall is provided with 2 road O-ring seals, gases at high pressure and extraneous air in isolated pressurized air cabin.On gland bonnet, be provided with a gas admittance valve, this gas admittance valve is connected with air compressor, starts after air compressor, by this gas admittance valve, in compression chamber, injects air, and air pressure constantly increases, and promotes to add tamponade and moves downward generation pressure, and schematic diagram as shown in Figure 5.
(14) base plate:
As shown in Figure 6, base plate 13 is circular, diameter is 700mm, it is the part of bearing of whole device gravity, outer rim is stretched out the native case 100mm of storage, in the part of stretching out, be provided with the preformed hole that 8 diameters are 20mm, bracing boom from preformed hole through and utilize screw to be connected with top seal lid, by base plate, Chu Tuxiang, add tamponade and be connected as a whole with gland bonnet.
(15) O RunddichtringO:
O-ring seal in this device adopts O RunddichtringO, by silica gel strip, made, that this installs main containment member, silica gel strip diameter 6mm, the O RunddichtringO diameter being made into is 470mm, O RunddichtringO is arranged between gland bonnet and the native case of storage, and gases at high pressure and extraneous air in isolated pressurized air cabin, prevent that gases at high pressure from leaking outside.
This prepressing device experimental working technique is as follows:
First the anchor cable body of rod is inserted to model casing center, in body of rod outer cover, lead slurry pipe, beginning packs a certain amount of soil sample into model casing, after cover gland bonnet, assemble prepressing device, start the outside air compressor connecting, according to the pressure gauge reading of air compressor and the embedding earth pressure gauge reading of the native chamber interior wall of storage, determine the degree of pressurizeing.
(2) grouting device:
(21) grouting pump:
Grouting pump adopts pressure common grouting pump, and grouting pressure is 0.1～0.6MPa.
(22) lead slurry pipe:
As shown in Figure 7, lead the pvc pipe that slurry pipe adopts length 1200mm, mouth of pipe external diameter 30～40mm, both ends open, following 100mm place, top and be vertically the arm that 30 ° of angles extend 70mm length, arm openend is connected with slip casting sebific duct.Apart from leading the 500mm place beginning of slurry pipe top, have the side opening of diameter 3～4mm in pipe side four direction symmetry, two holes are between the upper and lower apart from 50mm, and every layer has 4 apertures.The aperture of the last 150mm At The Height of low side starts to encrypt, between the upper and lower apart from 30mm.
This grouting device experimental working technique is as follows:
Prepressing device remains stable after adding to design pressure, starts to connect slip casting sebific duct at grouting port, and is connected with grouting pump.First, with the about opened by pressure grouting pump of 0.4～0.5Mpa, slurries are filled rapidly and led slurry pipe (can not exceed boundary line, soil layer top), then reduce pressure, making slurries pass through side opening slowly infiltrates in the soil body, continuation low-pressure grouting or termination of pumping continue to mend slurry after slurries decline again, and after stablizing, stop for slurry.After about 20min, start vertically slowly to extract Grouting Pipe, position that can not center of disturbance anchor cable.
(3) draw-off gear:
Draw-off gear is mainly comprised of centre-hole jack 33, detachable tension ground tackle 35 and locking ground tackle 36, cone-shaped clip 361 and combined bearing support 32 etc.Whole device is fixed on 3 fixed bars and some motion bars, and fixed bar is fixed on the periphery of cylindrical model case with 120 ° of angles.By lifting jack, with the certain pressure jack-up backing plate that makes progress, the cone-shaped clip on backing plate also moves upward simultaneously, and intermediate plate is squeezed after entering into tension ground tackle, and anchor cable is played to certain folder contracting effect, plays the stretch-draw effect of anchor cable.After being stretched to predetermined pull, unload lifting jack, steel strand wires start retraction, now drive the intermediate plate of bottom locking ground tackle to move downward, intermediate plate is squeezed after entering ground tackle, steel strand wires are produced to contractionary effect, but the pressure-bearing disk of bottom has stoped the downward displacement of locking ground tackle, plays the locking action to prestress anchorage cable.As shown in Figure 8, concrete design is as follows for whole draw-off gear.
(31) centre-hole jack:
Adopt small-sized centre-hole jack or anchor rod drawing meter, oil cylinder hollow diameters 27mm, deadweight 5kg left and right, measurement range 0～5t.
(32) ground tackle and intermediate plate:
Ground tackle is detachable tension ground tackle and locking ground tackle, is all steel ground tackles, and there is connecting sewing centre, and the arc cassette tape of both sides plays the effect of combination and dismounting ground tackle.The high 30mm of ground tackle, cross section is that external diameter is the circle of 40mm.Middle part is bellmouth, the steel body of rod that is 6mm through diameter.In bellmouth, be inserted with the cone-shaped clip of hollow, be used for clamping the body of rod.The schematic diagram of ground tackle and intermediate plate as shown in Figure 9.
What placed on centre-hole jack top is tension ground tackle, between them, use with diameter is the backing plate connection of 15～20mm circular hole, when lifting jack makes progress jack-up, just make backing plate drive intermediate plate to be moved upward to after certain distance, intermediate plate and ground tackle mutually extruding make intermediate plate tighten the extrusion anchor cable body of rod, under the effect of lifting jack, realize the stretch-draw effect of the anchor cable body of rod (anchor cable bottom is fixed by slurry).After lifting jack off-load, the dismantle tension ground tackle on top, the anchor cable body of rod starts retraction, at this moment the intermediate plate of the locking ground tackle of bottom (vertex of a cone under) moves down, can produce extruding with ground tackle, but locking ground tackle has limited the displacement of himself on pressure-bearing disk, makes the anchor cable body of rod can not produce rebound phenomenon, with this, realizes the locking to pretension.After test, only two cassette tapes of ground tackle side need to be backed out and can be taken out intermediate plate, realize and move back anchor operation.
(33) supplementary disc:
This experimental provision has the supplementary disc of three center drillings, is respectively fixed disc, spacing disk and pressure-bearing disk, and their apertures are different, and role is also different.Fixed disc and spacing disk be respectively in top and the bottom of lifting jack, and all with vertical ring baffle, effect is the fixing vertical lifting jack of placing, and spacing disk also plays and stops and lock the displacement that the intermediate plate of ground tackle makes progress, and facilitates afterburning anchor cable is locked.Pressure-bearing disk mainly plays a part to bear top instrument loading, as long as middle aperture meets, can not produce rubbing action to the anchor cable body of rod.Concrete schematic diagram as shown in figure 10.
(34) Mobile type combination support:
Experimental provision needs 3 sectional shelf-units altogether, with 120 ° of angles, is arranged in cylindrical model case outside, and every sectional shelf-unit is all comprised of a fixed bar and two motion bars.Fixed bar total length 1200mm, cross sectional dimensions is 40mm * 70mm.Fixed bar is reserved with position, two holes, each outside, position, hole is lined with the rubber blanket of 2～3mm, position, hole size is that 20mm * 30mm * 200mm(comprises rubber blanket thickness), apart from masthead 100mm and both sides, 150mm place, there are respectively two nuts to add tieholen, for the fixing motion bar that inserts preformed hole position.Fixed bar one side has two rectangles to get stuck, and is to be connected with base plate with the top board of model casing, and object is firm fixed bar, makes it not produce and rock; Between two steel nails, be welded with triangle pallet, be used for placing disk; Bottom is welded with square plate and ground is fixed.Fixed bar schematic diagram as shown in figure 11.
On every fixed bar, can connect two motion bars, according to top, settle the size of instrument to stretch up and down, finally with nut, be fixed.Motion bar total length 600mm, can insert fixed bar 200mm at most, and sectional dimension is 17mm * 30mm * 600mm, and bar a and bar b are being welded with respectively triangle pallet apart from top 100mm and 350mm place, and in order to fixed disc, schematic diagram as shown in figure 12.
This draw-off gear experimental working technique is as follows:
Slip casting is complete, starts anchor cable to carry out drawing operation after slurries solidify and reach some strength.First fix respectively 3 fixed bars, then insert motion bar a, b, the position according to the size up-down adjustment motion bar of testing program and placement instrument, makes to contact closely between each member.The lifting jack jack-up that makes progress, small-sized backing plate need be placed in top, then settles vertex of a cone tension ground tackle upward.Under spacing disk, must then settle vertex of a cone locking ground tackle down, other measurement, register instrument etc. can be laid in different positions according to research contents.While retreating anchor most, should first dismantle the tension ground tackle at top, then off-load lifting jack, slowly remove the locking ground tackle (only need back out the nut on ground tackle side cassette tape during dismounting) of dismantling again bottom after lifting jack.
Beneficial effect of the present invention is: this anchor cable draw-off gear simple in structure, understandable, easy to operate, can complete whole test indoor substantially.The true stratum simulation system such as precompressed, slip casting and anchor cable draw-off gear are carried out to combination, make test findings more approach field condition.Rationally, apply accurately this test unit, not only can simulate the stressing conditions of anchor cable and anchoring section under deep formation, but also can be the correlativity problems such as slurries expanding, damage of soil body face, provide test platform, single prepressing device also can carry out the confined compression test of the soil body, for the settlement calculation of foundation soil provides actual parameter.The grouting device of this test unit can effectively be simulated anchor cable and grouting body, grouting body and these two kinds of interfaces of the soil body, is the effective ways of interface parameter research.The ground tackle that test adopts is detachable, has realized a kind of easy, easy-operating anchor technology of moving back.Draw-off gear dirigibility is larger, and instrument can be realized by the combination of different order the research to different content, for researcher provides larger independence.
In sum, this anchor cable pull-out test device, can simulate the confined pressure in certain depth soil layer by prepressing device; Use with the leading the slip casting of slurry pipe and can simulate anchor cable body and slurry, slurry and two kinds of interphases of Rock And Soil of side opening, existing draw-off gear had not been realized two kinds of interfacial accurate simulations; Use detachable stretch-draw and locking ground tackle can realize the locking of the stretching of anchor cable and prestress, and directly turn on ground tackle cassette tape and can complete and move back anchor, solved the technical matters of moving back anchor difficulty; In addition, the convenient mobile and assembling of movable sectional shelf-unit, carries out for scientific research personnel the topic experiment research that independence is larger.Therefore, patent quasi-solution of the present invention is certainly at the indoor analogue simulation to on-the-spot anchor cable drawing, can realize simulation, the soil layer at anchoring body interface in the simulation of confined pressure under certain depth soil layer and slurry diffusion, different soil are destroyed to the simulation of face, the simulation of loss of prestress and a kind of easy the on probation of anchor technology that move back, can be for the shop experiment (can do confined compression) of site soil layers or relevant scientific research task research.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (10)
1. an anchor cable pull-out test device, is characterized in that, comprising:
Prepressing device, grouting device and draw-off gear; Wherein,
Described grouting device is comprised of grouting pump and the slurry pipe of leading with side opening, and described grouting pump is connected with the described slurry pipe of leading with side opening;
In described prepressing device, be provided with soil body cabin;
Being arranged in the described soil body cabin of described prepressing device with side opening one end of pipe starched in leading of described grouting device;
Described draw-off gear is arranged on described prepressing device upper end, and the anchor cable of described draw-off gear extend in the soil body cabin of described prepressing device through the slurry pipe of leading of described grouting device.
2. anchor cable pull-out test device according to claim 1, is characterized in that, described prepressing device comprises:
Store up native case, base plate, add tamponade, O-ring seal, gland bonnet, air compressor and a plurality of bracing boom; Wherein,
The native case of described storage is arranged on described base plate, and described gland bonnet is arranged in the upper end open of the native case of described storage, between the described gland bonnet outside the native case of described storage and described base plate, by described a plurality of bracing booms, connects;
Described gland bonnet be provided with for described in add tamponade rear end through and the gathering sill to its guiding;
Describedly add tamponade and be arranged in the native case of described storage, described in to add in the native case of described storage of tamponade below be soil body cabin, described pressurization is compression chamber in the native case of described storage of side beyond the Great Wall;
The front end periphery that adds tamponade described in contacting with the native chamber interior wall of described storage is provided with O-ring seal, described in add the rear end of tamponade and the gathering sill contact position of described gland bonnet is provided with O-ring seal;
Described air compressor is connected with the compression chamber in the native case of described storage.
3. anchor cable pull-out test device according to claim 2, is characterized in that, described in add tamponade and be provided with the through hole that connects cock body.
4. anchor cable pull-out test device according to claim 1, is characterized in that, the slurry pipe of leading with side opening of described grouting device is comprised of body and side pipe;
On described body, be furnished with size through hole identical, that distribute symmetrically;
Described side pipe is arranged on the side of described body upper end, and described side pipe is communicated with in described body, and described side pipe is provided with the grouting port being communicated with the slip casting sebific duct of described grouting pump.
5. anchor cable pull-out test device according to claim 1, is characterized in that, described draw-off gear comprises:
Combined bearing support, centre-hole jack, backing plate, tension ground tackle, locking ground tackle and surveying instrument;
Described combined bearing support is arranged on described prepressing device, the top in described prepressing device top;
Described centre-hole jack is arranged on described combined bearing support;
Described backing plate is placed on the top of described centre-hole jack;
Described anchor cable is very heavy through described backing plate and punching, on the described anchor cable of described backing plate top, described tension ground tackle is set, and sets gradually described locking ground tackle and surveying instrument on the described anchor cable of the very heavy below of described punching;
Described surveying instrument is arranged on described combined bearing support.
6. anchor cable pull-out test device according to claim 5, is characterized in that, described combined bearing support comprises:
Pressure-bearing disk, at least three fixed bars, spacing disk, fixed disc and at least six roots of sensation motion bar; Wherein,
Described each fixed bar is uniformly set at described prepressing device periphery, is fixedly connected with described prepressing device;
Described pressure-bearing disk is arranged between the upper end of described each fixed bar, and described pressure-bearing disk is arranged on described each fixed bar, and described pressure-bearing disk middle part is provided with the through hole passing through for described anchor cable;
Every described fixed bar upper end arranges two described motion bars, and described motion bar is fixedly connected with described fixed bar;
Described fixed disc and described spacing disk are disposed between described each motion bar from top to bottom, and described fixed disc and described spacing disk are arranged on described each motion bar;
The limiting section that is provided with fixing described centre-hole jack in the middle of described fixed disc and described spacing disk, described fixed disc and described spacing disk middle part are provided with the through hole passing through for described anchor cable.
7. anchor cable pull-out test device according to claim 6, is characterized in that, described two fixed bars inner side is equipped with shelf bracket, and described pressure-bearing disk is arranged on the described shelf bracket of described two fixed bars inner side;
Described fixed disc and described spacing disk are disposed on from top to bottom between at least two described motion bars and are: described each motion bar inner side is all interval with shelf bracket, and described spacing disk and fixed disc are disposed on from top to bottom at least two described motion bars and are fixedly installed on the shelf bracket inside described each motion bar.
8. according to the anchor cable pull-out test device described in claim 5 or 6, it is characterized in that, described tension ground tackle comprises:
Ground tackle body, two arc cassette tapes and cone-shaped clip; Wherein,
Described ground tackle body is the annular solid being comprised of two semi-ring bodies, and the mesopore of described annular solid is bellmouth, and the upper shed of described bellmouth is less than under shed;
Described cone-shaped clip is comprised of two semi-ring cone-shaped bodys, and described cone-shaped clip is fastened in described bellmouth from bottom to up;
Described two arc cassette tape spiral-locks are originally external at described ground tackle, are fixedly connected with two semi-ring bodies of described ground tackle body, and two semi-ring bodies of described ground tackle body are connected to whole annular solid.
9. according to the anchor cable pull-out test device described in claim 5 or 6, it is characterized in that, described locking ground tackle comprises:
Ground tackle body, two arc cassette tapes and cone-shaped clip; Wherein,
Described ground tackle body is the annular solid being comprised of two semi-ring bodies, and the mesopore of described annular solid is bellmouth, and the upper shed of described bellmouth is greater than under shed;
Described cone-shaped clip is comprised of two semi-ring cone-shaped bodys, and described cone-shaped clip is fastened in described bellmouth from top to bottom;
Described two arc cassette tape spiral-locks are originally external at described ground tackle, are fixedly connected with two semi-ring bodies of described ground tackle body, and two semi-ring bodies of described ground tackle body are connected to whole annular solid.
10. according to the anchor cable pull-out test device described in claim 5 or 6, it is characterized in that, described surveying instrument adopts hollow load transducer.
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| CN201310752075.0A CN103698215B (en) | 2013-12-31 | 2013-12-31 | Pull-out test device for anchor cable |
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| CN201310752075.0A CN103698215B (en) | 2013-12-31 | 2013-12-31 | Pull-out test device for anchor cable |
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| CN105699192A (en) * | 2016-03-14 | 2016-06-22 | 安徽省建筑科学研究设计院 | Pull-out test device of glass fiber rib anti-floating anchor and test method of pull-out test device |
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| CN106092749A (en) * | 2016-06-03 | 2016-11-09 | 东北大学 | A kind of anchor rod drawing and measure on stress pulse assay device and method |
| CN108732091A (en) * | 2018-07-30 | 2018-11-02 | 福建工程学院 | It is a kind of initial set before slurry surface adhesiveness detection device and its method |
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| CN111198096A (en) * | 2019-12-09 | 2020-05-26 | 河北建筑工程学院 | Soil anchor rod drawing test device and test method considering grouting pressure |
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| CN105784590A (en) * | 2016-04-22 | 2016-07-20 | 华北水利水电大学 | Method and device for testing bonding strength of anchoring interface of anchoring system |
| CN106092749A (en) * | 2016-06-03 | 2016-11-09 | 东北大学 | A kind of anchor rod drawing and measure on stress pulse assay device and method |
| CN108956105A (en) * | 2018-05-16 | 2018-12-07 | 福州大学 | Technology of Deepwater Mooring System body bearing capacity simulation test device and test method |
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| CN109374418A (en) * | 2018-09-20 | 2019-02-22 | 浙江大学 | Equivalent Elasticity boundary Lower chains and native tangential and normal direction drag test device |
| CN109959606A (en) * | 2019-04-29 | 2019-07-02 | 中国水利水电第十二工程局有限公司 | The device of on-site test gunite concrete and country rock bonding strength test |
| CN111198096A (en) * | 2019-12-09 | 2020-05-26 | 河北建筑工程学院 | Soil anchor rod drawing test device and test method considering grouting pressure |
| CN111198096B (en) * | 2019-12-09 | 2022-01-14 | 河北建筑工程学院 | Soil anchor rod drawing test device and test method considering grouting pressure |
| CN111721612A (en) * | 2020-06-04 | 2020-09-29 | 河北建筑工程学院 | Anchor rod drawing test device and test method considering temperature and pressure influence |
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