CN207675607U - A kind of novel geotextile silting experiment instrument - Google Patents

Abstract

The utility model is related to geotextile materials detecting instrument technical fields, disclose a kind of novel geotextile silting experiment instrument, including：Silting cylinder main body, head control device, pressure measuring unit, vacuum suction saturation system and obstetric pressurizing washing device；The silting cylinder main body includes：Head cover, upper cylinder, middle cylinder, lower cylinder and pedestal, filter paper or strainer are provided between upper cylinder and middle cylinder, it is provided with geotextile between middle cylinder and lower cylinder, the head cover is equipped with water inlet and exhaust outlet, pedestal is equipped with discharge outlet, upper cylinder is connect with vacuum suction saturation system, multiple radial pressure taps are equipped on the middle cylinder of geotextile both sides and lower cylinder, multiple radial direction pressure taps are separately connected pressure measuring unit, lower cylinder is connect with obstetric pressurizing washing device, this novel geotextile silting experiment instrument, it can carry out vacuum suction saturation, can accurate judgement geotextile whether the degree of silting and silting；It detects, works well after the geotextile of silting being rinsed and be rinsed.

Description

A kind of novel geotextile silting experiment instrument

Technical field

The utility model is related to geotextile materials detecting instrument technical field, more particularly to a kind of novel geotextile Silting experiment instrument is mainly used for the penetration clogging characteristic test of geotextile and the test of silting flushing effect.

Background technology

Geotextile is the new geomaterial made of high molecular synthetic material, has good water penetration and smaller Hole disclosure satisfy that requirement of the engineering to filtering material.As a result, the anti-filter performance of geosynthetics flood control and disaster reduction, Reclaiming land around sea has been more and more widely used across fields such as the remote water transfer in basin, environmental protection and urban construction.To ensure Water can be smoothly discharged by geotextile, and can make that the unlikely loss of soil body particle, geotechnical fibre filter design is protected often to need Meet soil conservation, permeable and three criterion of silting blocking.But geotextile silting phenomenon is universal in engineer application, makes it in anti-filter Using having been more limited, and geotextile it is stifled with it is in close relations by the property of the protection soil body.

Can silting be the big problem that be used for a long time in relation to geotechnical fibre filter layer, and it is anti-to judge whether geotextile meets Clogging criterion need to carry out gradient than experiment.China's water conservancy industry standard《Geosynthetics test procedure》(SL235-2012) In specially show " experiment of 33. siltings " of geotextile, experiment regulation is measured using gradient ratio method under certain flow condition Infiltration coefficient in soil-geotextile system and its interface and infiltration ratio pass through infiltration coefficient and infiltration ratio drastically change Change to judge the block possibility of geotextile.Existing experimental provision our experiments show that, have the following defects：

(1) existing silting experimental provision is confined to immersion saturation capillary saturation for soil body saturation process, it is clear that this is right It is not applicable in cohesive soil.Clay vacuum suction-immersion saturation, can be only achieved higher saturated soil.The soil body is saturated Insufficient effect that will directly affect seepage flow sludge plugging.

(2) existing silting experiment instrument uses gradient than judgment criteria, also in place of Shortcomings.In penetration clogging experimentation In, fine grained migrates in soil, if generating silting in geotextile, can make the reduction of its penetrating power.But in turn, Penetrating power becomes smaller, and may not necessarily illustrate that silting is exactly to be happened at geotextile, because soil layer itself is it can also happen that silting.I.e. There are two aspects for soil geotextile thrashing：On the one hand it is geotextile by silting, is on the other hand then soil sample by silting. And existing silting experiment instrument can only measure the infiltration for the total system that soil sample is constituted within the scope of geotextile and its top 25mm Coefficient, and it is unable to the infiltration coefficient of soil sample within the scope of independent measurement geotextile or its top 25mm, it so just cannot be well Judge the position that silting generates, can cause being that silting that soil layer itself generates is considered as the silting generated at geotextile in fact Erroneous judgement.

(3) existing experimental provision can only carry out, from the unidirectional experiment without silting-silting is started, cannot carrying out knitting geotechnique Object be rinsed after by reversed experiment of the silting-without silting, i.e., can not detect flushing effect.

This patent is to solve three technological deficiencies existing for existing geotextile silting experimental provision：It (1) cannot be into Row vacuum suction is saturated, and air is difficult to fully be discharged existing for soil sample-geotextile system, can seriously affect experimental result；(2) Be unable to accurate judgement geotextile whether the degree of silting and silting；(3) geotextile of silting cannot be rushed It washes and is detected after rinsing.

The experimental provision of the application patent is exactly to solve above-mentioned three major issues design.

Utility model content

The utility model provides a kind of novel geotextile silting experiment instrument, can solve in the prior art above-mentioned ask Topic.

The utility model provides a kind of novel geotextile silting experiment instrument, including：Silting cylinder main body, head control Device, pressure measuring unit, vacuum suction saturation system and obstetric pressurizing washing device；

The silting cylinder main body includes：Head cover, upper cylinder, middle cylinder, lower cylinder and pedestal, head cover, upper cylinder, middle cylinder, lower cylinder and bottom Sealing is detachably connected seat successively, is connected inside upper cylinder, middle cylinder and lower cylinder, filter paper is detachably provided between upper cylinder and middle cylinder Or strainer, geotextile is detachably provided between middle cylinder and lower cylinder, the head cover is equipped with water inlet and exhaust outlet, head control Device processed is located at the top of water inlet, and water inlet is connected to by silicone tube with head control device, and silicone tube is equipped with tongs, Silicone tube is connected on exhaust outlet, silicone tube is equipped with only gas folder, and pedestal is equipped with discharge outlet, and discharge outlet connects drainpipe, draining Pipe is equipped with drain valve, and upper cylinder connect with vacuum suction saturation system, is equipped on the middle cylinder of geotextile both sides and lower cylinder more A radial direction pressure tap, multiple radial direction pressure taps connect pressure measuring unit by sebific duct respectively, and lower cylinder is connect with obstetric pressurizing washing device.

Preferably, the upper cylinder, middle cylinder and lower cylinder include：Cylindrical tube and two blocks of rectangular plates, rectangular plate Center is overlapped with the axis of cylindrical tube；The upper and lower port of cylindrical tube is fixedly connected with rectangular plate respectively, the side Shape plate offers the circular hole consistent with cylindrical tube inner diameter size as the center of circle using center, the rectangular plate being located on the outside of circular hole On set there are two the different annular groove of radius size, the center of circle of circular hole is overlapped with the axis of two annular grooves, two annulars O-ring seal is equipped in groove；Filter paper or strainer are clamped in the interior side ring on two rectangular plates between upper cylinder and middle cylinder Between O-ring seal in connected in star, geotextile is clamped in the interior side ring on two rectangular plates between middle cylinder and lower cylinder Between O-ring seal in connected in star, two radius size differences corresponding on rectangular plate also are provided on head cover and pedestal Annular groove, it is circumferential on head cover, pedestal and two neighboring rectangular plate to offer multiple corresponding bolts hole, it is two neighboring Bolt hole on rectangular plate is arranged between two annular grooves, and head cover, upper cylinder, middle cylinder, lower cylinder and pedestal pass sequentially through more A bolt is fixed across multiple bolts hole, and O-ring seal is cased between bolt hole and bolt to seal.

Preferably, the head control device includes hand capstan, overflow for water drum and water system, hand capstan passes through The steel wire rope that lower end is equipped with hook is connect with overflow for water drum around fixed pulley, and the hand capstan is closing self-locking, per lattice Precision 5mm, the overflow open up three holes for water drum at cylinder bottom；Three holes are fixedly connected with three height in cylinder respectively Different pvc pipes is senior executive, middle pipe and low pipe；The lower end of senior executive connects overflow pipe, and the lower end of middle pipe connects water system, low The lower end of pipe connects water inlet by silicone tube, and silicone tube is equipped with water check valve, partition board is provided between the middle pipe and low pipe.

Preferably, the pressure measuring unit includes pressure measurement plate and Duo Gen sebific ducts, the perpendicular of more 1.5m long is installed on pressure measurement plate Straight pressure-measuring pipe, and the graph paper that minimum scale is 1mm is posted, more vertical pressure-measuring pipe lower ends pass through sebific duct and multiple radial directions respectively Pressure tap connects one to one.

Preferably, the vacuum suction saturation system includes：Vacuum meter valve, vacuum pump and deionized water water case, vacuum Table valve is mounted on by three-way connection on head cover, and is connected with upper cylinder, and three-way connection connects vacuum pump, deionization by pipeline Water water feeding tank connects drain valve by pipeline.

Preferably, the obstetric pressurizing washing device includes：Connect soon three-way connection, circular openings flush pipe, pressurised water tank, manually Force (forcing) pump, pressure gauge, air-stopping valve and connect feed pipe soon, in the lower cylinder of the setting of circular openings flush pipe 7, be located at geotextile just under Side connects three-way connection on lower cylinder soon, connects the both ends connection circular openings flush pipe that three-way connection is located on the inside of lower cylinder soon Both ends, connect one end that three-way connection is located on the outside of lower cylinder soon and connect with pressurised water tank by connecing feed pipe soon, air-stopping valve setting It is connecing on feed pipe soon, Manual pressurization pump and pressure gauge are arranged on pressurised water tank.

Preferably, being additionally provided with the porous pressure-bearing porous disc for fixed placement permeable stone or bead on the upper cylinder inner wall Four the first card slots.

Preferably, the lower cylinder inner wall is equipped with multiple second card slots for placing porous pressure-bearing porous disc；Under described It is radial on cylinder to open up there are four through-hole, it is fixedly mounted one on four through-holes and connects straight coupling soon, connect straight coupling and glue soon Pipe connects.

Preferably, the straight coupling that connects soon selects 316L stainless steels.

Preferably, the multiple pressure tap is 14,7 are distributed in for one group at middle cylinder and lower cylinder different height, two Radial symmetric is distributed.

Compared with prior art, the beneficial effects of the utility model are：

By the way that test cylinder is divided into three upper cylinder, middle cylinder and lower cylinder parts, three parts are connected to and divide the utility model Work is clear, and upper cylinder is mainly used for vacuum suction and water supply, and middle cylinder is the sticky soil sample of filling；Lower cylinder installs geotextile, passes through Water inlet, exhaust outlet, discharge outlet, vacuum suction saturation system carry out vacuum suction and into water saturations, realize the height of specimen sample Saturation degree solves the problems, such as that traditional instrument cannot be such that soil sample is fully saturated；By multiple pressure taps of geotextile both sides and Pressure measuring unit directly monitors geotextile silting situation, solves traditional instrument and is unable to accurate measurement geotextile itself silting The problem of；By the circular openings flush pipe and obstetric pressurizing washing device below geotextile, pressure water alignment geotechnique is realized Fabric mutually backwashed with former seepage direction, and geotextile can be measured by Seepage Experiment, that is, silting experiment again again after flushing Gradient ratio can detect flushing effect, solve the problems, such as that traditional instrument cannot simulate flushing and the effect detection of geotextile.

The utility model is feasible by multigroup simulated experiment proof, can carry out vacuum suction saturation, can accurate judgement geotechnique Fabric whether the degree of silting and silting；It detects, and imitates after the geotextile of silting being rinsed and be rinsed Fruit is good.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram of novel geotextile silting experiment instrument provided by the utility model.

Fig. 2 is that A-A is cut in a kind of novel geotextile silting experiment instrument structural schematic diagram Fig. 1 provided by the utility model The sectional view in face.

Fig. 3 is that B-B is cut in a kind of novel geotextile silting experiment instrument structural schematic diagram Fig. 1 provided by the utility model The sectional view in face.

Reference sign：

1- silting cylinder main bodys, 2- head control devices, 3- pressure measuring units, 4- vacuum suction saturation systems, 5- pressure flush Device, 6- head covers, the upper cylinders of 7-, cylinder in 8-, cylinder under 9-, 10- pedestals, 11- water inlets, 12- exhaust outlets, 13- vacuum meter valves, 14- Pressure tap, 15- connect three-way connection soon, and 16- overflows are for water drum, 17- trepanning flush pipes, 18- drain valves, 19- hand capstans, 20- First card slot, 21- permeable stones, 22- geotextiles, the rectangular plates of 23-, 24- annular grooves, 25- bolts hole, 26- air-stopping valves.

Specific implementation mode

Below in conjunction with the accompanying drawings, a specific implementation mode of the utility model is described in detail, it is to be understood that this The protection domain of utility model is not restricted by specific implementation.

As shown in Figure 1, Figure 2 and Figure 3, a kind of novel geotextile silting experiment that the utility model embodiment provides Instrument, including：Silting cylinder main body 1, head control device 2, pressure measuring unit 3, vacuum suction saturation system 4 and obstetric pressurizing washing device 5；

The silting cylinder main body 1 includes：Head cover 6, upper cylinder 7, middle cylinder 8, lower cylinder 9 and pedestal 10, head cover 6, upper cylinder 7, middle cylinder 8, lower cylinder 9 and pedestal 10 seal successively is detachably connected, and is connected inside upper cylinder 7, middle cylinder 8 and lower cylinder 9, upper cylinder 7 and middle cylinder 8 it Between be detachably provided with filter paper or strainer, geotextile 22 is detachably provided between middle cylinder 8 and lower cylinder 9, is set on the head cover 6 There are water inlet 11 and exhaust outlet 12, head control device 2 to be located at the top of water inlet 11, water inlet 11 passes through silicone tube and head Control device 2 is connected to, and silicone tube is equipped with tongs, and silicone tube is connected on exhaust outlet 12, and silicone tube is equipped with only gas folder, pedestal 10 are equipped with discharge outlet, and discharge outlet connects drainpipe, and drainpipe is equipped with drain valve 18, upper cylinder 7 and vacuum suction saturation system 4 It connects, multiple radial pressure taps 14 is equipped on the middle cylinder 8 of 22 both sides of geotextile and lower cylinder 9, multiple radial direction pressure taps 14 divide Pressure measuring unit 3 is not connected by sebific duct, lower cylinder 9 is connect with obstetric pressurizing washing device 5.

Preferably, the upper cylinder 7, middle cylinder 8 and lower cylinder 9 include：Cylindrical tube and two blocks of rectangular plates 23, square plate The center of part 23 is overlapped with the axis of cylindrical tube；The upper and lower port of cylindrical tube is fixed with rectangular plate 23 respectively to be connected It connects, the rectangular plate 23 offers the circular hole consistent with cylindrical tube inner diameter size as the center of circle using center, is located at outside circular hole It is set on the rectangular plate 23 of side there are two the different annular groove 24 of radius size, the center of circle of circular hole and two annular grooves 24 Axis overlaps, and O-ring seal is equipped in two annular grooves 24；Filter paper or strainer are clamped in two between upper cylinder 7 and middle cylinder 8 Between the O-ring seal in outer annular groove 24 on a rectangular plate 23, geotextile 22 is clamped in middle cylinder 8 and lower cylinder 9 Between two rectangular plates 23 on outer annular groove 24 in O-ring seal between, also be provided on head cover 6 and pedestal 10 The annular groove 24 different from corresponding two radius sizes on rectangular plate 23, head cover 6, pedestal 10 and two neighboring square plate Circumferential on part 23 to offer multiple corresponding bolts hole 25, the bolt hole 25 on two neighboring rectangular plate 23 is arranged at two Between annular groove 24, head cover 6, upper cylinder 7, middle cylinder 8, lower cylinder 9 and pedestal 10 pass sequentially through multiple bolts and pass through multiple bolts hole 25 are fixed, and O-ring seal is cased between bolt hole 25 and bolt to seal.

The upper cylinder 7, middle cylinder 8, lower cylinder 9 are fixed by cylindrical tube body portion and 23 combination sealing of rectangular plate； The rectangular plate 23 offers the circular hole consistent with cylindrical tube internal diameter in its middle, seals and connects with cylinder lower edges It connects；The rectangular plate offers annular groove 24 along 10mm, 25mm on the outside of circular hole, O-shaped to be placed when being contacted between cylinder Sealing ring；The bolt hole 25 of 8 diameter 6mm is circumferentially uniformly provided between two annular groove 24, so as to mutual between cylinder It is fixed.

Inside o types circle is additionally operable to clamping filter paper when being evacuated saturation between the upper cylinder 7 and middle cylinder 8, in seepage flow sludge plugging mistake For nylon leaching net to be clamped in journey；Rectangular plate 23 is in direct contact between the o types sealing ring and cylinder, and internal diameter is not less than 7mm, line Diameter is adjusted according to 22 thickness of clamped geotextile, it is ensured that sealing ring has enough deformations when tightening bolt, generally uses line footpath 2-3mm Left and right O-ring stack combinations.

Preferably, the head control device 2 includes hand capstan 19, overflow is for water drum 16 and water system, hand strand The steel wire rope that disk 19 is equipped with hook by lower end is connect with overflow for water drum 16 around fixed pulley, and the hand capstan 19 is closing Self-locking, per lattice precision 5mm, the overflow opens up three holes for water drum 16 at cylinder bottom；Three holes are solid in cylinder respectively Surely the different pvc pipe of three height is connected, is senior executive, middle pipe and low pipe；The lower end of senior executive connects overflow pipe, and the lower end of middle pipe connects Water system is connect, the lower end of low pipe connects water inlet 11 by silicone tube, and silicone tube is equipped with water check valve, the middle pipe and low pipe Between be provided with partition board.

Air free water enters overflow from water system in water drum 16, then passing through low pipe, silicone tube and water inlet by middle pipe Mouth 11 enters in upper cylinder 7, and senior executive makes overflow remain at the height of senior executive's upper port, extra water for water level in water drum 16 It is flowed away by overflow pipe, you can keep ordinary water level state.Partition board is set between middle pipe and low pipe, with reduce bubble by low hole into Enter silting system.

Preferably, the pressure measuring unit 3 includes pressure measurement plate and Duo Gen sebific ducts, erecting for more 1.5m long is installed on pressure measurement plate Straight pressure-measuring pipe, and the graph paper that minimum scale is 1mm is posted, more vertical pressure-measuring pipe lower ends pass through sebific duct and multiple radial directions respectively Pressure tap 14 connects one to one.

Preferably, the vacuum suction saturation system 4 includes：Vacuum meter valve 13, vacuum pump and deionized water water case, very Empty table valve 13 is mounted on by three-way connection on head cover 6, and is connected with upper cylinder 7, and three-way connection connects vacuum pump by pipeline, Deionized water water case connects drain valve 18 by pipeline.

Preferably, the obstetric pressurizing washing device 5 includes：Three-way connection 15, circular openings flush pipe 17, pressure (hydraulic) water are connect soon Case, Manual pressurization pump, pressure gauge, air-stopping valve 26 and feed pipe is connect soon, in the lower cylinder of the setting of circular openings flush pipe 17 9, be located at soil The underface of work fabric 22 connects three-way connection 15 on lower cylinder 9 soon, connects three-way connection 15 is located at 9 inside of lower cylinder two soon The both ends of end connection circular openings flush pipe 17 connect three-way connection 15 and are located at the one end in 9 outside of lower cylinder by connecing feed pipe soon soon It is connect with pressurised water tank, the setting of air-stopping valve 26 is connecing on feed pipe soon, and Manual pressurization pump and pressure gauge are arranged at pressurised water tank On.

Preferably, being additionally provided on 7 inner wall of upper cylinder saturating for the porous pressure-bearing of fixed placement permeable stone 21 or bead Four the first card slots 20 of water plate.

The first card slot is equipped at 7 lower edge 15mm of the upper cylinder, it is fixed in system pumping saturation process to meet The needs of permeable stone 21；First card slot 20 is distributed in four positions of cylinder inboard wall, and two-way with 14 position transverse and longitudinal of pressure tap It is staggered, to prevent influencing head at pressure tap 14.

Preferably, 9 inner wall of lower cylinder is equipped with multiple second card slots for placing porous pressure-bearing porous disc；Under described It is radially opened up on cylinder 9 there are four through-hole, be fixedly mounted one on four through-holes connects straight coupling soon, connects straight coupling and glue soon Pipe connects.

The second card slot is equipped at 9 lower edge 50mm of the lower cylinder, to meet the need for placing porous pressure-bearing porous disc It wants, four through-holes are radial pressure tap 14, connect the connection that straight coupling facilitates radial pressure tap 14 and sebific duct soon.

Preferably, the straight coupling that connects soon selects 316L stainless steels, 316L stainless steels are selected, it is acidproof to meet straight coupling The requirement of caustic corrosion.

Preferably, the multiple pressure tap 14 is 14,7 are distributed in for one group at middle cylinder 8 and lower 9 different height of cylinder, Two radial symmetric distributions.

Head cover 6 opens up 2 screw thread mouths, and 1 screw thread mouth is opened up on pedestal 10, for installing water check valve, 13 and of vacuum meter valve Drain valve 18.

The vacuum meter valve 13 uses tee joint vacuum valve door table, and the threeway part is for connecting head cover 6, vacuum meter valve 13 And vacuum pump；The vacuum meter valve 13 is in open state when being evacuated saturation to system using vacuum pump, in flow event It is closed.

It is radial at 9 top edge 50mm of lower cylinder to open up through-hole, and fixed threeway quick union is installed；The threeway connects soon For connector when being rinsed experiment, both ends connect trepanning annular high voltage pipe；The straight-through quick union connects in process of osmosis Seal plug connects obstetric pressurizing washing device 5 in irrigation tests.

Application method and the course of work：As shown in Figure 1, Figure 2 and Figure 3, the rectangular plate 23 of stripping device is ring flange, is taken out Middle cylinder 8 prepares sticky soil sample and tamps and arrive required density, fills up middle cylinder 8 on demand；It takes cylinder 7 to be inverted, places permeable stone and filter Paper, filter paper diameter are slightly larger than the annular groove 24 of inside；O-ring seal is placed in the annular groove 24 of upper cylinder 7, it will The middle cylinder 8 for filling sample preparation clay moves to above 7 bottom of cylinder, and the bolt tightened between two is fixed；Between middle cylinder 8 and lower cylinder 9 Round geotextile 22 to be measured and pressure-bearing strainer are fixed, fixing means is identical as filter paper fixing means, tightens bolt；It will dress Horizontalization is put, and lower cylinder 9 installs fixed head cover 6, tighten bolt under；It closes the water check valve on water inlet 11, close on drainpipe The effective tongs sealing of drain valve 18, the silica gel for connecting pressure tap 14 and exhaust outlet 12, rinses the three-way connection of nozzle connection One end is sealed with plug outside cylinder；Threeway vacuum meter valve 13 is connected into vacuum pump, opens simultaneously 13 valve of vacuum meter valve and true Sky pump starts pumping saturation；When the reading of vacuum meter valve 13 reaches setting negative pressure, and maintain 1h, you can drainpipe is inserted into and is filled It is micro- to open drain valve 18 in the sink of full distilled water, control water intake velocity so that vacuum meter reading kept stable；Wait for water level Cover sticky soil sample, you can close drain valve 18 and stop water inlet；Water inlet finishes, and closes vacuum pump, vacuum meter valve 13, unclamps exhaust Tongs on pipe, stand overnight, and are saturated soil sample using air, that is, complete vacuum suction saturation process.

Cylinder 7 is unloaded, permeable stone 21 is withdrawn from, changes original filter paper into nylon leaching net, cylinder 7 in refitting unloads head cover 6, It is paved with one layer of bead on nylon leaching net, resets head cover 6, opens water check valve water filling into device on water inlet 11, control Water intake velocity is in order to avoid impact soil sample, until water is overflowed from the exhaust 12 of head cover 6, then system saturation is fully completed.

Overflow is adjusted for water drum 16 and drainpipe outlet height with control system head size, if experiment requires ordinary water top Part then no longer adjusts in the process.

The tongs for opening drain valve 18 and each pressure tap 14 compress the tongs of exhaust pipe, start seepage flow sludge plugging process. In the process, the reading of each pressure-measuring pipe is recorded, discharge outlet changes in flow rate, the muddy degree of observation draining are measured.To the end of silting process, Measure geotextile oven-dry weight.

It rinses, solubility test specific implementation mode：It repeats the above steps, analysis pressure-measuring pipe reading, until show that geotechnique knits Object infiltration coefficient reduces and stablizes conclusion in a certain range, and connection connects three-way connection 15 and obstetric pressurizing washing device soon, keeps It is sufficient with water in pressurised water tank, Manual pressurization pump is controlled, the reading on pressure gauge is made to remain stable substantially, in flushing process, note Time and the pressure size of geotextile 22 are rinsed in record.After completing flushing process, flow event is reentered, waits for that pressure-measuring pipe is read After basicly stable, the reading of each pressure-measuring pipe is recorded, and compared with the numerical value before flushing, analyzes the change of 22 infiltration coefficient of geotextile Change.Solubility test designs in the case of being directed to geotextile chemical colmatage, and corresponding chemical reagent, remaining step need to be added in water tank It is identical.

By the way that test cylinder is divided into three upper cylinder, middle cylinder and lower cylinder parts, three parts are connected to and divide the utility model Work is clear, and upper cylinder 7 is mainly used for vacuum suction and water supply, inside sets card slot for fixing permeable stone in being evacuated saturation process；In 8 height of cylinder are set as 50mm, and the depth of fill of cohesive soil is as generally by protection soil sample；It is installed in the internal layer groove of lower cylinder 9 Geotextile 22 covers upper miniature O-ring seal when connecting bolt between mounting cylinder in junction, and can avoid will in tradition silting experiment Geotextile is placed directly in caused boundary on porous disc and streams.

The head cover 6 on 7 top of upper cylinder also opens up vacuum meter nozzle, vacuum meter valve 13 is true in addition to water inlet 11, exhaust outlet 12 Empty air aspiration stage is open and connects vacuum pump, remaining situation is then closed.It is saturated high leakproofness requirement to meet vacuum, is connected between cylinder Inside and outside double-deck annular groove 24 is opened up on the rectangular plate 23 at the place of connecing, for placing O-ring seal, these measures allow to pair Entire test cylinder is vacuumized and into water saturation, realizes the high saturation of specimen sample, and solving traditional instrument cannot make The problem of soil sample is fully saturated.

In addition to by traditional silting experiment instrument, pressure tap 14 is set, within the scope of close geotextile clamping zone 5mm, up and down Radial pressure tap 14 is opened up, for directly monitoring geotextile silting situation, traditional instrument is solved and is unable to accurate measurement soil The problem of itself silting of work fabric.

For the flushing for simulating to silting object, in the middle part of lower cylinder, side wall is radially opened at geotextile clip position 50mm If diameter 15mm nozzles, and install pneumatically connect three-way connection 15 soon, wherein connect soon 15 both ends of three-way connection be located in cylinder respectively with Circular openings flush pipe 17 is end to end, and the other end is located on the outside of cylinder, is connected with obstetric pressurizing washing device 5 when rinsing；Pressurization Flusher 5 includes water tank, Manual pressurization pump and pressure gauge.Available pressure water is directed at geotextile and carries out and former seepage direction phase Backwash.Experiment cylinder can be horizontally arranged, then do not deposit particulate silting object on geotextile after rinsing, then pass through Seepage Experiment, that is, silting Experiment can measure gradient ratio again, can detect flushing effect.If there being chemical colmatage substance on geotextile, it can be selected and close It is rinsed in suitable reagent incorporation water, can dissolve chemical colmatage object.This method, which solves traditional instrument, cannot simulate geotechnique The flushing of fabric and effect detection problem.

The utility model discloses the realities that a kind of novel geotechnical fibre filter system silting performance test and silting are rinsed Experiment device is mainly used for the penetration clogging characteristic test of geotextile and the test of silting flushing effect.The device includes：Silting Apparatus main body, head control device, pressure measuring unit and obstetric pressurizing washing device.Technical solutions of the utility model test traditional silting Instrument has carried out various improvement, and improved device can vacuumize entire test cylinder and into water saturation, realize The high saturation of specimen sample solves the problems, such as that traditional instrument cannot be such that soil sample is fully saturated；It is clamped close to geotextile Within the scope of the 5mm of region, radial pressure tap 14 is opened up up and down, for directly monitoring geotextile silting situation, solves tradition Instrument is unable to the problem of itself silting of accurate measurement geotextile；It is mounted with the flusher to geotextile, available pressure water Geotextile is rinsed, flushing effect is detected by Seepage Experiment class.If there being chemical colmatage substance on geotextile, It then can be selected and be rinsed in suitable reagent incorporation water, can dissolve chemical colmatage object.This method solves traditional instrument not Flushing and the effect detection problem of geotextile can be simulated.

Disclosed above is only several specific embodiments of the utility model, and still, the utility model embodiment is not office It is limited to this, the changes that any person skilled in the art can think of should all fall into the scope of protection of the utility model.

Claims (10)

1. a kind of novel geotextile silting experiment instrument, which is characterized in that including：Silting cylinder main body (1), head control device (2), pressure measuring unit (3), vacuum suction saturation system (4) and obstetric pressurizing washing device (5)；

The silting cylinder main body (1) includes：Head cover (6), upper cylinder (7), middle cylinder (8), lower cylinder (9) and pedestal (10), head cover (6), Upper cylinder (7), middle cylinder (8), lower cylinder (9) and pedestal (10) seal be detachably connected successively, upper cylinder (7), middle cylinder (8) and lower cylinder (9) Inside is connected, and filter paper or strainer are detachably provided between upper cylinder (7) and middle cylinder (8), can between middle cylinder (8) and lower cylinder (9) Dismounting is provided with geotextile (22), and the head cover (6) is equipped with water inlet (11) and exhaust outlet (12), head control device (2) it is located at the top of water inlet (11), water inlet (11) is connected to head control device (2) by silicone tube, is set on silicone tube There are tongs, silicone tube is connected on exhaust outlet (12), silicone tube is equipped with only gas folder, and pedestal (10) is equipped with discharge outlet, draining Mouth connection drainpipe, drainpipe are equipped with drain valve (18), and upper cylinder (7) connect with vacuum suction saturation system (4), is located at geotechnique Multiple radial pressure taps (14), multiple radial direction pressure taps (14) point are equipped on the middle cylinder (8) and lower cylinder (9) of fabric (22) both sides Pressure measuring unit (3) is not connected by sebific duct, lower cylinder (9) connect with obstetric pressurizing washing device (5).

2. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that the upper cylinder (7), middle cylinder (8) and lower cylinder (9) includes：Cylindrical tube and two pieces of rectangular plates (23), the center of rectangular plate (23) and cylindrical tube The axis of body overlaps；The upper and lower port of cylindrical tube is fixedly connected with rectangular plate (23) respectively, the rectangular plate (23) The circular hole consistent with cylindrical tube inner diameter size is offered as the center of circle using center, is located on the rectangular plate (23) on the outside of circular hole If there are two the different annular groove (24) of radius size, the center of circle of circular hole is overlapped with the axis of two annular grooves (24), two It is equipped with O-ring seal in a annular groove (24)；Filter paper or strainer are clamped in two sides between upper cylinder (7) and middle cylinder (8) Between the O-ring seal in outer annular groove (24) on shape plate (23), geotextile (22) is clamped in middle cylinder (8) under Between the O-ring seal in the outer annular groove (24) on two rectangular plates (23) between cylinder (9), head cover (6) and bottom It also is provided with the annular groove (24) different from upper corresponding two radius sizes of rectangular plate (23), head cover (6), bottom on seat (10) It is circumferential on seat (10) and two neighboring rectangular plate (23) to offer multiple corresponding bolts hole (25), two neighboring square plate Bolt hole (25) on part (23) is arranged between two annular grooves (24), head cover (6), upper cylinder (7), middle cylinder (8), lower cylinder (9) multiple bolts are passed sequentially through and are fixed across multiple bolts hole (25) with pedestal (10), bolt hole (25) is between bolt O-ring seal is cased with to seal.

3. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that the head control device (2) Including hand capstan (19), overflow for water drum (16) and water system, hand capstan (19) is equipped with the steel wire of hook by lower end Rope is connect with overflow for water drum (16) around fixed pulley, and the hand capstan (19) is closing self-locking, per lattice precision 5mm, institute It states overflow and opens up three holes at cylinder bottom for water drum (16)；It is different that three holes are fixedly connected with three height in cylinder respectively Pvc pipe is senior executive, middle pipe and low pipe；The lower end of senior executive connects overflow pipe, and the lower end of middle pipe connects water system, under low pipe End connects water inlet (11) by silicone tube, and silicone tube is equipped with water check valve, partition board is provided between the middle pipe and low pipe.

4. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that the pressure measuring unit (3) includes Pressure measurement plate and Duo Gen sebific ducts are equipped with the vertical pressure-measuring pipe of more 1.5m long on pressure measurement plate, and post the seat that minimum scale is 1mm Millimeter paper, more vertical pressure-measuring pipe lower ends are connected one to one by sebific duct and multiple radial pressure taps (14) respectively.

5. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that vacuum suction saturation system System (4) include：Vacuum meter valve (13), vacuum pump and deionized water water case, vacuum meter valve (13) are mounted on by three-way connection On head cover (6), and it is connected with upper cylinder (7), three-way connection connects vacuum pump by pipeline, and deionized water water case passes through pipeline Connect drain valve (18).

6. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that the obstetric pressurizing washing device (5) include：Three-way connection (15), circular openings flush pipe (17), pressurised water tank, Manual pressurization pump, pressure gauge, air-stopping valve are connect soon (26) and soon feed pipe is connect, the lower cylinder (9) of circular openings flush pipe (17) setting is interior, is located at the underface of geotextile (22), soon Three-way connection (15) is connect on lower cylinder (9), the both ends connection annular that three-way connection (15) is located on the inside of lower cylinder (9) is connect soon and opens The both ends of hole flush pipe (17) connect one end that three-way connection (15) is located on the outside of lower cylinder (9) by connecing feed pipe and pressurization soon soon Water tank connects, and air-stopping valve (26) setting is connecing on feed pipe soon, and Manual pressurization pump and pressure gauge are arranged on pressurised water tank.

7. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that on upper cylinder (7) inner wall It is additionally provided with four the first card slots (20) of the porous pressure-bearing porous disc for fixed placement permeable stone (21) or bead.

8. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that on lower cylinder (9) inner wall Equipped with multiple second card slots for placing porous pressure-bearing porous disc；Through-hole there are four radially being opened up on the lower cylinder (9), four One is fixedly mounted on through-hole and connects straight coupling soon, connects straight coupling soon and is connect with sebific duct.

9. novel geotextile silting experiment instrument as claimed in claim 8, which is characterized in that described to connect straight coupling choosing soon With 316L stainless steels.

10. novel geotextile silting experiment instrument as described in claim 1, which is characterized in that the multiple pressure tap (14) it is 14,7 are distributed in for one group at middle cylinder (8) and lower cylinder (9) different height, two radial symmetric distributions.