CN104727319B - A kind of side slope is from drainage anchor rod and construction method - Google Patents
A kind of side slope is from drainage anchor rod and construction method Download PDFInfo
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Abstract
A kind of side slope, from drainage anchor rod and construction method, comprises hollow anchor tube, ground tackle, backing plate and siphon pipe from drainage anchor rod; Hollow anchor tube one end opening, one end sealing, peripheral parcel filter screen, openend establish that screw thread, postmedian are offered permeable hole, back segment and grout outlet is vertical is connected, grout outlet end cover has sleeve valve and soil engineering bag, and grout outlet both sides are clamped to soil engineering bag on hollow anchor tube with anchor ear; Hollow anchor tube has a down dip and is positioned in the body of slope, keeps the mouth of pipe of hollow anchor tube and pipe end relative relief to be less than 7m, and slurry solidifies to be anchored in soil engineering bag to be stablized in the soil body, and ground tackle is anchored in hollow anchor tube leading portion on backing plate; Siphonal suction hose inserts in hollow anchor tube and extends bottom, is connected by joint bend pipe domatic with drainpipe and balance water outlet device, and the water inlet of suction hose is identical with balance water outlet device delivery port elevation. The present invention is simple in structure, and can realize anchoring and draining simultaneously, and there is good result, easy construction, cheap.
Description
Technical field
The invention belongs to geotechnical anchor engineering technical field, be specifically related to a kind of side slope from drainage anchor rod and construction method.
Background technology
Side slope is nature or the artificial slope forming, and is one of geological environment the most basic in human engineering activity, alsoIt is the modal project of engineering construction. As global three large geological disasters (earthquake, flood, landslip mud-rock flow)One of slope instability slump seriously injure national wealth and people's safety. Rainfall infiltration and level of ground water rise and make slopeBody shearing strength is lower, sliding force increases, and is one of principal element of induced landslide. Therefore, propping up shelves and draining is to prevent and treat unstabilityThe major measure of slump.
At present, propping up shelves and the main method of stabilization by drainage slope body has: (1) anchor pole and draining partition method, corresponding construction formFor: bolt anchorage slope body, domatic laying gutter, intercepting ditch and french drain, sump, osculum etc. for underground mining. This methodCombining form is various, but the subject matter existing is: (a) slope drainage measure is higher to slope body environmental requirement, and many side slopes are subject toOrographic condition limits, and causes being difficult to ensure the validity of drainage measure; (b) subdrainage french drain, osculum construction, sump is taken outWater rate is high, and difficulty of construction is large; (c) anchoring and draining can not be integrated, and structure function is single, can not meet engineering and wantAsk. (2) anchor pole and draining integrated method, version is: anchor pole and drainage channel set be in one, as: application number is201020521134.5 patent discloses a kind of drainage anchor rod, and permeable sleeve is equipped with at the middle part of the body of rod, and utilization is saturating with filter clothWater mantle, can discharge the water in Rock And Soil effectively; Application number is that 201110119283.8 patent discloses a kind of rowWater anchor pole and existing side slope retaining repairing and reinforcement structure, by connecting elements form axially detachable docking drainpipe andThe drainage anchor rod of anchoring pipe; Application number is 201310383960.6 to disclose a kind of drainage anchor rod, has geotechnique by anchor cable overcoatBag, has built respectively water tight concrete and pervious concrete outward with soil engineering bag in soil engineering bag, has reached draining and anchoring function.These described several anchor poles of method (2) are to be all inclined upwardly to anchor pole bottom by anchor head, and moisture is logical along draining under Action of Gravity FieldDischarge in road, possesses anchoring and drain function simultaneously, and structural form is simple, and drainage effect is better, and construction is simple, and construction costs is low,But slope instability be sliding soil mass along the downward slippage of slide surface, anchor force direction and slide surface normal direction folder when anchor pole is inclined upwardlyAngle is large, and anchor force is little along the component of sliding surface normal direction, therefore skid resistance is less, in order to ensure security, can only increase anchoring body diameterAnd rock-bolt length, so both uneconomical, dangerous again. Because moisture discharges along anchor pole incline direction, produce infiltration in additionMake every effort to promote into slip. And the downward-sloping anchor force of anchor pole and slide surface normal direction angle are little, anchor force is large along the component of sliding surface normal direction, brightThe aobvious mormal stress increasing between sliding soil mass and the stable soil body, the downward-sloping skid resistance of anchor pole enlarges markedly. Therefore, anchor poleBe inclined upwardly and its advantage can not be given full play to, anchoring effect does not have downward-sloping good. Hence one can see that, existing anchor pole and drainingThe method of integrated reinforcing slope body is to utilize Action of Gravity Field that superficial water is discharged, and Ti Nei deep, slope water can not be discharged, simultaneously waterDivide seepage flow to promote to slide, and the anchoring effect of anchor pole can not be given full play to.
Siphon technology is a kind of poor active force of liquid level that utilizes, and produces negative pressure water is inhaled from the high-order mouth of pipe in pipeEnter, produce certain lift, discharge from the low level mouth of pipe, there is physics spy unpowered and flow process is changed automatic control by liquid levelProperty, in water conservancy, field irrigation, slope drainage, be used widely. As the application number patent public affairs that are 201110147021.2Opened a kind of self-balancing siphon drainage method by using side slope declining drill hole, siphon pipe one end enters the deep of side slope by the inclined hole that has a down dip,One end is set in domatic position, in the time that level of ground water rises, by siphon pipe, slope body internal water is discharged to outside slope. But siphonTechnology can only draining can not anchoring, and serious in the bending of domatic position siphon pipe, cause local head loss sharply to increase, shadowRing drainage effect. The present invention is first in conjunction with the advantage of existing anchorage technology and siphon technology, and the skill existing while having solved setAn art difficult problem, proposes a kind of novel side slope from drainage anchor rod and construction method.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of limit simultaneously with anchoring and drain function is providedSlope is from drainage anchor rod and construction method.
The present invention be a kind of side slope from drainage anchor rod and construction method, a kind of side slope, from drainage anchor rod, comprises hollow anchor tube1, ground tackle 15, backing plate 16 and siphon pipe; One end opening of hollow anchor tube 1, one end sealing, peripheral parcel filter screen 2, openend are established spiral shellLine 3, postmedian offer permeable hole 4, back segment and grout outlet 5 is vertical is connected, and the end cover of grout outlet 5 has sleeve valve 6 and soil engineering bag 7,Cordage 8 colligations in soil engineering bag 7 are on hollow anchor tube 1, during the both sides of grout outlet 5 are clamped to soil engineering bag 7 with anchor ear 9On spare anchor pipe 1; Siphon pipe is connected with one end of drainpipe 12 by joint bend pipe 11 by suction hose 10, the other end of drainpipe 12Connect and compose with equalization of discharge device 13; Hollow anchor tube 1 has a down dip and is positioned in the body of slope, keeps the mouth of pipe and the pipe end of hollow anchor tube 1Have a relative relief, Grouting Pipe 17 is to the 1 internal pressure slip casting of hollow anchor tube, and slurry 14 solidifies and is anchored in Stabilized Soil in soil engineering bag 7In body, ground tackle 15 is anchored in hollow anchor tube 1 leading portion on backing plate 16; Siphonal suction hose 10 inserts in hollow anchor tube 1 and stretchesTo bottom, be connected with drainpipe 12 and balance water outlet device 13 by joint bend pipe 11 domatic, make suction hose 10 water inlet andEqualization of discharge device 13 delivery port elevations are identical; In the interior water filling of hollow anchor tube 1, bleed, make water from equalization of discharge device 13 with air exhausterFlow into equalization of discharge device 13, start initial siphon; When the interior water level of hollow anchor tube 1 rises, draining in real time.
A kind of side slope of the present invention, from the construction method of drainage anchor rod, the steps include:
(1) investigation and analysis side slope 21 geological conditions, hydrometeorological condition, understand side slope 21 earth's surfaces and underground water supply,Runoff and discharge regime, carry out engineer geological prospecting and design, potential sliding surface 20 positions on Analysis deterrmination landslide;
(2) make hollow anchor tube 1: determine the length of hollow anchor tube 1 according to step (1), the number of soil engineering bag 7; Before steel pipeEnd machining screw 3, rear end is sealed with entity, spacer segment 0.8～1.2m boring after steel pipe, and vertical welding grout outlet 5; At tube wallFirst disc is offered the permeable hole 4 that aperture is 5 ~ 10mm, within the scope of the left and right 0.1 ~ 0.15m of grout outlet 5 and steel pipe blind end withBetween an adjacent grout outlet 5, do not offer permeable hole 4; The inside and outside wall spary corrosion resistant coating of steel pipe, first oversleeve valve 6 on grout outlet 5, fibre8 colligations of dimension rope are on steel pipe, and grout outlet 5 both sides are fixed on soil engineering bag 7 on steel pipe with anchor ear 9 again, 2 ~ 3 layers of the peripheral parcels of steel pipeFilter screen 2;
(3) boring: according to the engineering design degree of depth and angle, boring in side slope 21;
(4) install from drainage anchor rod: (a) hollow anchor tube 1 is placed in domatic hole, and the semi circular surface court of permeable hole 4Upper, carry out segmenting slip casting by Grouting Pipe 17, every section of slip casting length is slip casting step pitch, the pulp on slip casting step pitch and hollow anchor tube 1Manage 5 spacing identical, step pitch is 0.8 ~ 1.2m, and grouting pressure is determined according to different stratum conditions; Slip casting process, simultaneously eachCarry out two sleeve valve 6 slip castings of same cross section, therefrom the forward end slip casting successively of spare anchor pipe 1 bottom, often completes once grouting, to17 1 step pitch length of upper mobile Grouting Pipe; After slip casting completes, at hollow anchor tube 1 leading portion cover upper padding plate 16, stretch-draw hollow anchor tube1, be anchored on backing plate 16 with ground tackle 15; And the circular protection network of a center drilling is installed at hollow anchor tube 1 front end; (b) basisThe elevation of hollow anchor tube 1 bottom is determined the delivery port elevation of equalization of discharge device 13, at domatic construction equalization of discharge device 13 emplacing platformsSeat; Equalization of discharge device 13 is placed on pedestal, and is tightly connected with drainpipe 12; Suction hose 10 is entered through protection network centre boreEnter hollow anchor tube 1 bottom, drainpipe 12 is connected with suction hose 10 with joint bend pipe 11, form siphon pipe;
(5) realize initial siphonic process: a certain amount of water of the interior injection of hollow anchor tube 1, the external air exhauster of equalization of discharge device 13,The water of bleeding arrives drainpipe 12 by suction hose 10, then enters equalization of discharge device 13, starts initial siphon, stops bleeding.
The invention has the beneficial effects as follows: set anchorage technology of the present invention and siphon drainage technology are in being integrally formed middle side slope certainlyDrainage anchor rod, has solved the sharp contradiction that anchoring and draining realize simultaneously, promotes the improvement level on landslide. Major advantage is: (1)Rubber sleeve valve and soil engineering bag have been realized slip casting anchoring, and do not affect draining. Grouting Pipe during to the slip casting of hollow anchor tube internal pressure, allowsSlurries enter in soil engineering bag by the rubber valve of tucking inside the sleeve, the water in soil engineering bag and particle are difficult to enter in hollow anchor tube, reach slip castingCheck valve effect; Slip casting finishes, and under the effect of stop grouting plug, not residual slurries in hollow anchor tube, totally do not affect draining; GeotechniqueBag, by slurry parcel, had both been realized anchoring, avoided again slurries to flow and shutoff permeable hole everywhere. (2) hollow anchor tube one end sealing,First disc of tube wall is offered permeable hole, and the moisture that rainfall on slope land infiltrates in the body of slope flows into hollow anchor tube by permeable hole along lower tube wallBottom, and level of ground water rise time, side slope deep moisture infiltrate permeable hole also can enter hollow anchor tube water-stored section. (3) siphonPipe, without any external impetus, is also safeguarded without regular administration, can automatically and efficiently domatic and body deep, slope moisture be arrangedGo out, can control slope underground water position below safe water plane; Joint bend pipe bending angle is large, the office while having alleviated siphon drainagePortion's loss of flood peak. (4) filter screen can prevent that permeable hole from being blocked by the soil body, and corrosion resistant coating can be avoided the corrosion of hollow anchor tube and lose anchorGu function. (5) simple in structure, powerful, construction method is easy, and existing good anchoring effect, has again stable drainageCan, strong adaptability, cheap.
Brief description of the drawings
Fig. 1 is the schematic diagram of the present invention from drainage anchor rod, and Fig. 2 is the schematic diagram of the hollow anchor tube in Fig. 1, and Fig. 3 is thisThe schematic diagram of bright construction slip casting process, Fig. 4 is the schematic diagram that the present invention implements in slope support engineering.
Description of reference numerals: hollow anchor tube 1, filter screen 2, screw thread 3, permeable hole 4, grout outlet 5, sleeve valve 6, soil engineering bag 7, fiberRope 8, anchor ear 9, suction hose 10, joint bend pipe 11, drainpipe 12, equalization of discharge device 13, slurry 14, ground tackle 15, backing plate 16, slip castingPipe 17, stop grouting plug 18, grouting tube 19, potential sliding surface 20, side slope 21, control water level 22.
Detailed description of the invention
Below in conjunction with accompanying drawing and instantiation, feature of the present invention is done further to describe, example is only for explainingThe present invention, not for limiting the scope of the invention. Reading after the present invention, within the spirit and principles in the present invention all, instituteDo any amendment, be equal to replace and improve all should be contained in protection scope of the present invention.
As shown in Figure 1,2,3, 4, the present invention is that a kind of side slope is from drainage anchor rod and construction method, in drainage anchor rod comprisesSpare anchor pipe 1, ground tackle 15, backing plate 16 and siphon pipe; Hollow anchor tube 1 one end openings, one end sealing, peripheral parcel filter screen 2, openendBe connected if screw thread 3, postmedian are offered permeable hole 4, back segment and grout outlet 5 is vertical, grout outlet 5 end covers have sleeve valve 6 and soil engineering bag7, cordage 8 colligations in soil engineering bag 7 are on hollow anchor tube 1, during grout outlet 5 both sides are clamped to soil engineering bag 7 with anchor ear 9On spare anchor pipe 1; Siphon pipe is connected with one end of drainpipe 12 by joint bend pipe 11 by suction hose 10, the other end of drainpipe 12Connect and compose with equalization of discharge device 13; Hollow anchor tube 1 has a down dip and is positioned in the body of slope, keeps the mouth of pipe and the pipe end of hollow anchor tube 1Have a relative relief, Grouting Pipe 17 is to the 1 internal pressure slip casting of hollow anchor tube, and slurry 14 solidifies and is anchored in Stabilized Soil in soil engineering bag 7In body, ground tackle 15 is anchored in hollow anchor tube 1 leading portion on backing plate 16; Siphonal suction hose 10 inserts in hollow anchor tube 1 and stretchesTo bottom, be connected with drainpipe 12 and balance water outlet device 13 by joint bend pipe 11 domatic, make suction hose 10 water inlet andEqualization of discharge device 13 delivery port elevations are identical; In the interior water filling of hollow anchor tube 1, bleed, make water from equalization of discharge device 13 with air exhausterFlow into equalization of discharge device 13, start initial siphon; When the interior water level of hollow anchor tube 1 rises, draining in real time.
As shown in Figure 1, 2, 3, the inside and outside brushing corrosion resistant coating of hollow anchor tube 1, prevents long-term corrosion, aging, diameter 60 ~ 80mm;Filter screen 2 is close order gauze or plastic wire, prevents that soil particle from stopping up permeable hole 4.
As shown in Figure 1, 2, 3, permeable hole 4 is spaced apart first discs of tube wall that are located at hollow anchor tube 1, and at grout outlet 5Left and right 0.1 ~ 0.15m within do not offer permeable hole 4, between hollow anchor tube 1 blind end and an adjacent grout outlet 5, also do not offerPermeable hole 4, permeable hole 4 diameters are 5 ~ 10mm; Slope body moisture enters in hollow anchor tube 1 by permeable hole 4, and along wall flow the end of toEnd sealing place.
As shown in Fig. 1,2,4, grout outlet 5 is arranged symmetrically with on the same cross section of hollow anchor tube 1, and grout outlet 5 is in hollowAnchor tube 1 axial spacing is 0.8～1.2m, and grout outlet 5 diameters are 10～15mm.
As shown in Figure 3, be provided with two stop grouting plugs 18 and grouting tube 19 in Grouting Pipe 17, grouting tube 19 length are0.1 ~ 0.15m; Only, for the position slip casting that has grout outlet 5, can not affect all the other positions, and slip casting is complete, can be at middle spare anchorManage 1 interior residual slurry 14.
As shown in Fig. 1,4, suction hose 10, drainpipe 12 internal diameters≤6mm; The bending angle of joint bend pipe 11 be 120 ° ~150°。
As shown in Figure 1, the mouth of pipe of hollow anchor tube 1 is less than 7m with the relative relief at the pipe end.
As shown in Figure 1, sleeve valve 6 is rubber sleeve valve.
As shown in Figure 1,2,3, 4, a kind of side slope of the present invention, from the construction method of drainage anchor rod, the steps include:
(1) investigation and analysis side slope 21 geological conditions, hydrometeorological condition, understand side slope 21 earth's surfaces and underground water supply,Runoff and discharge regime, carry out engineer geological prospecting and design, potential sliding surface 20 positions on Analysis deterrmination landslide;
(2) make hollow anchor tube 1: determine the length of hollow anchor tube 1 according to step (1), the number of soil engineering bag 7; Before steel pipeEnd machining screw 3, rear end is sealed with entity, spacer segment 0.8～1.2m boring after steel pipe, and vertical welding grout outlet 5; At tube wallFirst disc is offered the permeable hole 4 that aperture is 5 ~ 10mm, within the scope of the left and right 0.1 ~ 0.15m of grout outlet 5 and steel pipe blind end withBetween an adjacent grout outlet 5, do not offer permeable hole 4; The inside and outside wall spary corrosion resistant coating of steel pipe, first oversleeve valve 6 on grout outlet 5, fibre8 colligations of dimension rope are on steel pipe, and grout outlet 5 both sides are fixed on soil engineering bag 7 on steel pipe with anchor ear 9 again, 2 ~ 3 layers of the peripheral parcels of steel pipeFilter screen 2;
(3) boring: according to the engineering design degree of depth and angle, boring in side slope 21;
(4) install from drainage anchor rod: (a) hollow anchor tube 1 is placed in domatic hole, and the semi circular surface court of permeable hole 4Upper, carry out segmenting slip casting by Grouting Pipe 17, every section of slip casting length is slip casting step pitch, the pulp on slip casting step pitch and hollow anchor tube 1Manage 5 spacing identical, step pitch is 0.8 ~ 1.2m, and grouting pressure is determined according to different stratum conditions; Slip casting process, simultaneously eachCarry out two sleeve valve 6 slip castings of same cross section, therefrom the forward end slip casting successively of spare anchor pipe 1 bottom, often completes once grouting, to17 1 step pitch length of upper mobile Grouting Pipe; After slip casting completes, at hollow anchor tube 1 leading portion cover upper padding plate 16, stretch-draw hollow anchor tube1, be anchored on backing plate 16 with ground tackle 15; And the circular protection network of a center drilling is installed at hollow anchor tube 1 front end; (b) basisThe elevation of hollow anchor tube 1 bottom is determined the delivery port elevation of equalization of discharge device 13, at domatic construction equalization of discharge device 13 emplacing platformsSeat; Equalization of discharge device 13 is placed on pedestal, and is tightly connected with drainpipe 12; Suction hose 10 is entered through protection network centre boreEnter hollow anchor tube 1 bottom, drainpipe 12 is connected with suction hose 10 with joint bend pipe 11, form siphon pipe;
(5) realize initial siphonic process: a certain amount of water of the interior injection of hollow anchor tube 1, the external air exhauster of equalization of discharge device 13,The water of bleeding arrives drainpipe 12 by suction hose 10, then enters equalization of discharge device 13, starts initial siphon, stops bleeding.
The flowing and control procedure of moisture in the body of slope of the present invention: when side slope 21 topsoil body burden water raise or deep undergroundWhen water level rises, water flows through permeable hole 4 and enters in hollow anchor tube 1, and along wall flow to bottom sealing place, treats in hollow anchor tube 1Water level during higher than the delivery port of equalization of discharge device 13, siphonic process occurs, and utilizes siphon principle to discharge and accumulates in hollow anchor tube 1Interior water, the water level of realizing in hollow anchor tube 1 declines, and gradually water in side slope 21 is discharged outside slope, until the water in hollow anchor tube 1Position is identical with the delivery port water level of equalization of discharge device 13, reaches the control water level 22 of goal-setting, and siphonic process temporarily stops; ThisTime equalization of discharge device 13 and the interior fixed level that all remains with of hollow anchor tube 1, rainfall next time or other factors make the interior water of side slope 21Divide while increasing, repeat said process, after the interior water level of hollow anchor tube 1 rises, siphonic process repeats again, makes the interior beginning of hollow anchor tube 1Eventually in lower water position status.
Claims (9)
1. side slope, from a drainage anchor rod, is characterized in that: this anchor pole comprise hollow anchor tube (1), ground tackle (15), backing plate (16) andSiphon pipe; One end opening of hollow anchor tube (1), one end sealing, peripheral parcel filter screen (2), openend are established screw thread (3), postmedianOffer permeable hole (4), back segment and vertical connection of grout outlet (5), the end cover of grout outlet (5) has sleeve valve (6) and soil engineering bag (7),Cordage (8) colligation in soil engineering bag (7) is upper at hollow anchor tube (1), and the anchor ear for both sides (9) of grout outlet (5) is by soil engineering bag (7)Be clamped on hollow anchor tube (1); Siphon pipe is passed through one end of joint bend pipe (11) and drainpipe (12) by suction hose (10)Connect, the other end of drainpipe (12) and equalization of discharge device (13) connect and compose; Hollow anchor tube (1) has a down dip and is positioned over slope bodyIn, keep the mouth of pipe of hollow anchor tube (1) and pipe to have a relative relief in an end, Grouting Pipe (17) is to hollow anchor tube (1) internal pressure slip casting,Slurry (14) solidifies to be anchored in soil engineering bag (7) to be stablized in the soil body, and hollow anchor tube (1) leading portion is anchored in backing plate by ground tackle (15)(16) on; Siphonal suction hose (10) inserts in hollow anchor tube (1) and extends bottom, domatic by joint bend pipe (11) withDrainpipe (12) is connected with balance water outlet device (13), makes water inlet and balance water outlet device (13) the delivery port elevation of suction hose (10)Identical; Water filling in hollow anchor tube (1), bleeds, moves the water to flow into equalization of discharge device (13) from equalization of discharge device (13) with air exhauster,Start initial siphon; When the interior water level of hollow anchor tube (1) rises, draining in real time.
2. side slope according to claim 1, from drainage anchor rod, is characterized in that: the inside and outside brushing corrosion resistant coating of hollow anchor tube (1);Filter screen (2) is close order gauze or plastic wire.
3. side slope according to claim 1, from drainage anchor rod, is characterized in that: permeable hole (4) is the spaced apart hollow that is located atFirst disc of tube wall of anchor tube (1), and within the left and right 0.1 ~ 0.15m of grout outlet (5), do not offer permeable hole (4), middle spare anchorBetween pipe (1) blind end and an adjacent grout outlet (5), also do not offer permeable hole (4), permeable hole (4) diameter is 5 ~ 10mm.
4. side slope according to claim 1, from drainage anchor rod, is characterized in that: grout outlet (5) is same hollow anchor tube (1)On one cross section, be arranged symmetrically with, grout outlet (5) is 0.8～1.2m at hollow anchor tube (1) axial spacing, and grout outlet (5) diameter is10～15mm。
5. side slope according to claim 1, from drainage anchor rod, is characterized in that: in Grouting Pipe (17), be provided with two groutingsPlug (18) and grouting tube (19), grouting tube (19) length is 0.1 ~ 0.15m.
6. side slope according to claim 1, from drainage anchor rod, is characterized in that: suction hose (10), drainpipe (12) internal diameter≤ 6mm; The bending angle of joint bend pipe (11) is 120 ° ~ 150 °.
7. side slope according to claim 1, from drainage anchor rod, is characterized in that: the mouth of pipe of hollow anchor tube (1) and the pipe endRelative relief is less than 7m.
8. side slope according to claim 1, from drainage anchor rod, is characterized in that: sleeve valve (6) is rubber sleeve valve.
9. side slope, from the construction method of drainage anchor rod, the steps include:
(1) investigation and analysis side slope (21) geological conditions, hydrometeorological condition, understand side slope (21) earth's surface and underground water supply,Runoff and discharge regime, carry out engineer geological prospecting and design, potential sliding surface (20) position on Analysis deterrmination landslide;
(2) make hollow anchor tube (1): determine the length of hollow anchor tube (1) according to step (1), the number of soil engineering bag (7); Steel pipeFront end machining screw (3), rear end is sealed with entity, spacer segment 0.8～1.2m boring after steel pipe, and vertical welding grout outlet (5);Offer the permeable hole that aperture is 5 ~ 10mm (4) at first disc of tube wall, within the scope of the left and right 0.1 ~ 0.15m of grout outlet (5) and steelBetween duct occlusion end and an adjacent grout outlet (5), do not offer permeable hole (4); The inside and outside wall spary corrosion resistant coating of steel pipe, grout outlet(5) upper first oversleeve valve (6), cordage (8) colligation is on steel pipe, and grout outlet (5) both sides use anchor ear (9) that soil engineering bag (7) is solid againOn steel pipe, the peripheral parcel of steel pipe 2 ~ 3 metafiltration nets (2);
(3) boring: according to the engineering design degree of depth and angle, in the upper boring of side slope (21);
(4) install from drainage anchor rod: (a) hollow anchor tube (1) is placed in domatic hole, and the semi circular surface court of permeable hole (4)Upper, carry out segmenting slip casting by Grouting Pipe (17), every section of slip casting length is slip casting step pitch, on slip casting step pitch and hollow anchor tube (1)Grout outlet (5) spacing is identical, and step pitch is 0.8 ~ 1.2m, and grouting pressure is determined according to different stratum conditions; Slip casting process, everyInferior two sleeve valves (6) slip casting of simultaneously carrying out same cross section, therefrom the forward end slip casting successively of spare anchor pipe (1) bottom, often completesOnce grouting, (17) step pitch length of the Grouting Pipe that moves up; After slip casting completes, at hollow anchor tube (1) leading portion cover upper padding plate(16), stretch-draw hollow anchor tube (1), is anchored on backing plate (16) with ground tackle (15); And at hollow anchor tube (1) front end, one center is installedThe circular protection network of perforate; (b) determine the delivery port elevation of equalization of discharge device (13) according to the elevation of hollow anchor tube (1) bottom,Lay pedestal at domatic construction equalization of discharge device (13); Equalization of discharge device (13) is placed on pedestal, and close with drainpipe (12)Envelope connects; Suction hose (10) is entered to hollow anchor tube (1) bottom through protection network centre bore, use joint bend pipe (11) by drainpipe(12) be connected with suction hose (10), form siphon pipe;
(5) realize initial siphonic process: in hollow anchor tube (1), inject a certain amount of water, the external air exhauster of equalization of discharge device (13),The water of bleeding arrives drainpipe (12) by suction hose (10), then enters equalization of discharge device (13), starts initial siphon, stops bleeding.
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