CN104727319A - Slope self-drainage anchor rod and construction method - Google Patents
Slope self-drainage anchor rod and construction method Download PDFInfo
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- CN104727319A CN104727319A CN201510157530.1A CN201510157530A CN104727319A CN 104727319 A CN104727319 A CN 104727319A CN 201510157530 A CN201510157530 A CN 201510157530A CN 104727319 A CN104727319 A CN 104727319A
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Abstract
The invention relates to a slope self-drainage anchor rod and a construction method. The self-drainage anchor rod comprises a hollow anchor pipe, an anchorage device, a cushion plate and a siphon, wherein one end of the hollow anchor pipe is open, the other end of the hollow anchor pipe is closed, the hollow anchor pipe is wrapped in a filter screen, threads are arranged at the open end of the hollow anchor pipe, water-pervious holes are formed in the rear middle of the hollow anchor pipe, the rear segment of the hollow anchor pipe and a slurry outlet pipe are perpendicularly connected, the end of the slurry outlet pipe is sleeved with a sleeve valve and a geotextile bag, and on the two sides of the slurry outlet pipe, the geotextile bag is clamped and fixed to the hollow anchor pipe through hoops; the lower side of the hollow anchor pipe is obliquely placed in a slope, the relative height difference between the pipe opening of the hollow anchor pipe and the pipe bottom of the hollow anchor pipe is kept smaller than 7 m, pulp solidifies in the geotextile bag and is anchored in stable soil, and the front segment of the hollow anchor pipe is anchored to the cushion plate through the anchorage device; a water suction pipe of the siphon is inserted in the hollow anchor pipe and stretches to the bottom, the water suction pipe is connected with a drainage pipe and a balance water outlet device through connector bent pipes on the slope, and a water inlet of the water suction pipe is as high as a water outlet of the balance water outlet device. The slope self-drainage anchor rod is simple in structure, can achieve anchoring and draining at the same time and is good in drainage effect, easy and convenient to construct and low in manufacturing cost.
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 formed, and being one of geological environment the most basic in Human dried bloodstains, is also the modal project of engineering construction.Slope instability slump as one of global three large geological disasters (earthquake, flood, landslip mud-rock flow) seriously injures the safety of national wealth and people.Rainfall infiltration and groundwater table rise and make that slope body shear strength is lower, sliding force increases, and are one of principal elements of induced landslide.Therefore, the major measure that shelves and draining are control stability failure and slides is propped up.
At present, the main method of propping up shelves and stabilization by drainage slope body has: (1) anchor pole and draining partition method, corresponding construction form is: bolt anchorage slope body, domatic laying gutter, catchwater and underground mining french drain, collecting well, drain hole etc.This Combination of Methods is various informative, but the subject matter existed is: the measure of (a) slope drainage is higher to slope body environmental requirement, and many side slopes limit by orographic condition, causes the validity being difficult to ensure drainage measure; (b) underdrainage french drain, drain hole construction, collecting well expense of drawing water remains high, and difficulty of construction is large; C () anchoring can not be integrated with draining, structure function is single, can not engineering demands.(2) anchor pole and draining integrated method, form of structure is: anchor pole and drainage channel set are in one, as: application number be 201020521134.5 patent discloses a kind of drainage anchor rod, permeable sleeve is equipped with at the middle part of the body of rod, utilize the permeable sleeve of band filter cloth, can effectively the water in Rock And Soil be discharged; Application number be 201110119283.8 patent discloses a kind of drainage anchor rod and existing side slope retaining repairing and reinforcement structure, form the axially detachable gutter of docking and the drainage anchor rod of anchoring pipe by connecting elements; Application number is 201310383960.6 disclose a kind of drainage anchor rod, has soil engineering bag by anchor cable overcoat, in soil engineering bag and soil engineering bag has built watertight concrete and pervious concrete respectively outward, reach draining and anchoring function.This several anchor pole described in method (2) is all be inclined upwardly to anchor pole bottom by anchor head, moisture is discharged along drainage channel under gravity, possess anchoring and drain function simultaneously, structural form is simple, drainage effect is better, construction is simple, construction costs is low, but slope instability is that sliding mass is along the downward slippage of slide surface, when anchor pole is inclined upwardly anchored force direction and slide surface normal direction angle large, anchored force is little along the component of sliding surface normal direction, therefore skid resistance is less, in order to ensure safety, anchoring body diameter and rock-bolt length can only be increased, so both uneconomical, dangerous again.In addition because moisture discharges along anchor pole incline direction, produce penetration and promote to slide.And the downward-sloping anchored force of anchor pole and slide surface normal direction angle little, anchored force is large along the component of sliding surface normal direction, obviously increases the mormal stress between sliding mass and the stable soil body, and the downward-sloping skid resistance of anchor pole enlarges markedly.Therefore, anchor pole is inclined upwardly and its advantage can not be given full play to, and anchoring effect does not have downward-sloping good.It can thus be appreciated that existing anchor pole method of reinforcing slope body integrated with draining utilizes Action of Gravity Field to be discharged by superficial water, Ti Nei deep, slope water can not be discharged, moisture seepage flow promotes to slide simultaneously, and the anchoring effect of anchor pole can not give full play to.
Siphon technology is a kind of active force utilizing liquid level difference, in pipe, produce negative pressure water is sucked from the high-order mouth of pipe, produce certain lift, discharge from the low level mouth of pipe, there is the unpowered physical characteristic automatically controlled by liquid level change with flow process, be used widely in water conservancy, field irrigation, slope drainage.As application number be 201110147021.2 patent discloses a kind of self-balancing siphon drainage method by using side slope declining drill hole, syphon one end enters the deep of side slope by the inclined hole that has a down dip, one end is set in domatic position, when groundwater table rises, slope body internal water is discharged to outside slope by syphon.But siphon technology can only draining can not anchoring, and serious in the bending of domatic position syphon, cause local head loss sharply to increase, affect drainage effect.The present invention is first in conjunction with the advantage of existing anchoring and siphon technology, and the technical barrier existed when solving set, a kind of novel side slope is proposed from drainage anchor rod and construction method.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of side slope simultaneously with anchoring and drain function 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 tube 1, ground tackle 15, backing plate 16 and syphon; One end open, one end of hollow anchor tube 1 are closed, filter screen 2 is wrapped up in periphery, screw thread 3 is established in openend, postmedian offers permeable hole 4, back segment is connected with outlet pipe 5 is vertical, the end sleeve of outlet pipe 5 has sleeve valve 6 and soil engineering bag 7, cordage 8 colligation in soil engineering bag 7 is on hollow anchor tube 1, and soil engineering bag 7 is clamped on hollow anchor tube 1 by the both sides anchor ear 9 of outlet pipe 5; Syphon is connected with one end of gutter 12 by joint bend pipe 11 by suction water pipe 10, and the other end and the equalization of discharge device 13 of gutter 12 connect and compose; Hollow anchor tube 1 has a down dip and is positioned in the body of slope, keep there is a relative relief at the bottom of the mouth of pipe of hollow anchor tube 1 and pipe, Grouting Pipe 17 is to slip casing by pressure in hollow anchor tube 1, and slurry 14 solidifies and is anchored in the stable soil body in soil engineering bag 7, and hollow anchor tube 1 leading portion is anchored on backing plate 16 by ground tackle 15; Siphonal suction water pipe 11 to insert in hollow anchor tube 1 and extends bottom, domatic by joint bend pipe 11 and gutter 12 with balance water outlet device 13 and be connected, makes the water inlet of suction water pipe 11 identical with balancing water outlet device 13 delivery port elevation; Water filling in hollow anchor tube 1, bleeds from equalization of discharge device 13 with air exhauster, moves the water to flow into equalization of discharge device 13, start initial siphon; When in hollow anchor tube 1, water level rises, real-time draining.
A kind of side slope of the present invention, from the construction method of drainage anchor rod, the steps include:
(1) investigate and analyse side slope 21 geological conditions, hydrometeorological condition, understand the supply of side slope 21 earth's surface and underground water, runoff and discharge regime, carry out engineer geological prospecting and design, analyze potential water use 20 position determining to come down;
(2) hollow anchor tube 1 is made: the length determining hollow anchor tube 1 according to step (1), the number of soil engineering bag 7; Steel pipe front end machining screw 3, rear end entity is closed, and after steel pipe, spacer segment 0.8 ~ 1.2m holes, and vertical welding outlet pipe 5; Offer at first disc of tube wall the permeable hole 4 that aperture is 5 ~ 10mm, within the scope of the left and right 0.1 ~ 0.15m of outlet pipe 5 and between steel pipe blind end and an adjacent outlet pipe 5, do not offer permeable hole 4; Wall spary corrosion resistant coating inside and outside steel pipe, first oversleeve valve 6 on outlet pipe 5, cordage 8 colligation is on steel pipe, and soil engineering bag 7 is fixed on steel pipe with anchor ear 9 by outlet pipe 5 both sides again, steel pipe periphery parcel 2 ~ 3 metafiltration nets 2;
(3) hole: according to the engineering design degree of depth and angle, side slope 21 is holed;
(4) install from drainage anchor rod: hollow anchor tube 1 is placed in domatic hole by (a), and the semi circular surface of permeable hole 4 upward, segmenting slip casting is carried out by Grouting Pipe 17, every section of slip casting length is slip casting step pitch, slip casting step pitch is identical with outlet pipe 5 spacing on hollow anchor tube 1, namely step pitch is 0.8 ~ 1.2m, and grouting pressure is determined according to different stratum conditions; Slip casting process, carry out two sleeve valves 6 slip casting of same cross section, therefrom the forward end slip casting successively of spare anchor pipe 1 bottom, often completes once grouting at every turn simultaneously, the Grouting Pipe that moves up 17 1 step pitch length; 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 the circular protective screening of a center drilling is installed in hollow anchor tube 1 front end; B (), according to the delivery port elevation of the elevation determination equalization of discharge device 13 of hollow anchor tube 1 bottom, lays pedestal at domatic construction equalization of discharge device 13; Equalization of discharge device 13 is placed on pedestal, and is tightly connected with gutter 12; Suction water pipe 10 is entered hollow anchor tube 1 bottom through protective screening centre bore, with joint bend pipe 11, gutter 12 is connected with suction water pipe 10, form syphon;
(5) realize initial siphonic process: inject a certain amount of water in hollow anchor tube 1, the external air exhauster of equalization of discharge device 13, water of bleeding arrives gutter 12 by suction water pipe 10, then enters equalization of discharge device 13, starts initial siphon, stops bleeding.
The invention has the beneficial effects as follows: set anchoring of the present invention and siphon drainage technology, in being integrally formed middle side slope from drainage anchor rod, solve the sharp contradiction that anchoring and draining realize simultaneously, promote the improvement level on landslide.Major advantage is: (1) rubber sleeve valve and soil engineering bag achieve slip casting anchoring, and do not affect draining.Grouting Pipe is in hollow anchor tube during slip casing by pressure, and allow slurries enter in soil engineering bag by rubber sleeve valve, the water in soil engineering bag and particle are difficult to enter in hollow anchor tube, reach the one way valve effect of slip casting; Slip casting terminates, and under the effect of stop grouting plug, not residual slurry in hollow anchor tube, does not totally affect draining; Slurry wraps up by soil engineering bag, both achieves anchoring, avoids again slurries to flow everywhere and shutoff permeable hole.(2) hollow anchor tube one end is closed, first disc of tube wall offers permeable hole, the moisture that rainfall on slope land infiltrates in the body of slope flows into hollow anchor tube bottom by permeable hole along lower tube wall, and when groundwater table rises, side slope deep moisture infiltrate permeable hole also can enter hollow anchor tube water-stored section.(3) syphon is without the need to any external impetus, also safeguards without the need to regular administration, domatic and body deep, slope moisture can be discharged automatically and efficiently, can control slope underground water position below safe water plane; Joint bend pipe bending angle is large, alleviates local head loss during siphon drainage.(4) filter screen can prevent permeable hole from being blocked by the soil body, and corrosion resistant coating can be avoided the corrosion of hollow anchor tube and lose anchoring function.(5) structure is simple, and powerful, construction method is easy, and existing good anchoring effect, has again stable drainage performance, strong adaptability, cheap.
Accompanying drawing explanation
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 that the present invention constructs the schematic diagram of slip casting process, and 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, outlet pipe 5, sleeve valve 6, soil engineering bag 7, cordage 8, anchor ear 9, suction water pipe 10, joint bend pipe 11, gutter 12, equalization of discharge device 13, slurry 14, ground tackle 15, backing plate 16, Grouting Pipe 17, stop grouting plug 18, grouting tube 19, potential water use 20, side slope 21, controlling water level 22.
Detailed description of the invention
Further describe feature of the present invention below in conjunction with accompanying drawing and instantiation, example, only for explaining the present invention, is not for limiting the scope of the invention.After reading the present invention, within the spirit and principles in the present invention all, within any amendment done, equivalent replacement and improvement all should be contained in protection scope of the present invention.
As shown in Figure 1,2,3, 4, the present invention be a kind of side slope from drainage anchor rod and construction method, comprise hollow anchor tube 1, ground tackle 15, backing plate 16 and syphon from drainage anchor rod; Hollow anchor tube 1 one end open, one end are closed, filter screen 2 is wrapped up in periphery, screw thread 3 is established in openend, postmedian offers permeable hole 4, back segment is connected with outlet pipe 5 is vertical, outlet pipe 5 end sleeve has sleeve valve 6 and soil engineering bag 7, cordage 8 colligation in soil engineering bag 7 is on hollow anchor tube 1, and soil engineering bag 7 is clamped on hollow anchor tube 1 by outlet pipe 5 both sides anchor ear 9; Syphon is connected with one end of gutter 12 by joint bend pipe 11 by suction water pipe 10, and the other end and the equalization of discharge device 13 of gutter 12 connect and compose; Hollow anchor tube 1 has a down dip and is positioned in the body of slope, keep there is a relative relief at the bottom of the mouth of pipe of hollow anchor tube 1 and pipe, Grouting Pipe 17 is to slip casing by pressure in hollow anchor tube 1, and slurry 14 solidifies and is anchored in the stable soil body in soil engineering bag 7, and hollow anchor tube 1 leading portion is anchored on backing plate 16 by ground tackle 15; Siphonal suction water pipe 11 to insert in hollow anchor tube 1 and extends bottom, domatic by joint bend pipe 11 and gutter 12 with balance water outlet device 13 and be connected, makes the water inlet of suction water pipe 11 identical with balancing water outlet device 13 delivery port elevation; Water filling in hollow anchor tube 1, bleeds from equalization of discharge device 13 with air exhauster, moves the water to flow into equalization of discharge device 13, start initial siphon; When in hollow anchor tube 1, water level rises, real-time draining.
As shown in Figure 1, 2, 3, brushing corrosion resistant coating inside and outside hollow anchor tube 1, prevents long-term corrosion, aging, diameter 60 ~ 80mm; Filter screen 2 is close order gauze or plastic wire, prevents soil particle from blocking permeable hole 4.
As shown in Figure 1, 2, 3, permeable hole 4 is spaced apart first discs of tube wall being located at hollow anchor tube 1, and permeable hole 4 is not offered within the left and right 0.1 ~ 0.15m of outlet pipe 5, also do not offer permeable hole 4 between hollow anchor tube 1 blind end and an adjacent outlet pipe 5, permeable hole 4 diameter is 5 ~ 10mm; Slope body moisture is entered in hollow anchor tube 1 by permeable hole 4, and along wall flow to bottom end closure place.
As shown in Fig. 1,2,4, outlet pipe 5 is arranged symmetrically with on the same cross section of hollow anchor tube 1, and outlet pipe 5 is 0.8 ~ 1.2m at hollow anchor tube 1 axial spacing, and outlet pipe 5 diameter is 10 ~ 15mm.
As shown in Figure 3, Grouting Pipe 17 is provided with two stop grouting plugs 18 and grouting tube 19, grouting tube 19 length is 0.1 ~ 0.15m; Only for the position slip casting having outlet pipe 5, all the other positions can not be affected, and slip casting is complete, slurry 14 can not be remained in hollow anchor tube 1.
As shown in Fig. 1,4, suction water pipe 10, gutter 12 internal diameters≤6mm; The bending angle of joint bend pipe 11 is 120 ° ~ 150 °.
As shown in Figure 1, the mouth of pipe of hollow anchor tube 1 and the relative relief at the bottom of pipe are less than 7m.
As shown in Figure 1, valve 6 is tucked inside the sleeve for 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) investigate and analyse side slope 21 geological conditions, hydrometeorological condition, understand the supply of side slope 21 earth's surface and underground water, runoff and discharge regime, carry out engineer geological prospecting and design, analyze potential water use 20 position determining to come down;
(2) hollow anchor tube 1 is made: the length determining hollow anchor tube 1 according to step (1), the number of soil engineering bag 7; Steel pipe front end machining screw 3, rear end entity is closed, and after steel pipe, spacer segment 0.8 ~ 1.2m holes, and vertical welding outlet pipe 5; Offer at first disc of tube wall the permeable hole 4 that aperture is 5 ~ 10mm, within the scope of the left and right 0.1 ~ 0.15m of outlet pipe 5 and between steel pipe blind end and an adjacent outlet pipe 5, do not offer permeable hole 4; Wall spary corrosion resistant coating inside and outside steel pipe, first oversleeve valve 6 on outlet pipe 5, cordage 8 colligation is on steel pipe, and soil engineering bag 7 is fixed on steel pipe with anchor ear 9 by outlet pipe 5 both sides again, steel pipe periphery parcel 2 ~ 3 metafiltration nets 2;
(3) hole: according to the engineering design degree of depth and angle, side slope 21 is holed;
(4) install from drainage anchor rod: hollow anchor tube 1 is placed in domatic hole by (a), and the semi circular surface of permeable hole 4 upward, segmenting slip casting is carried out by Grouting Pipe 17, every section of slip casting length is slip casting step pitch, slip casting step pitch is identical with outlet pipe 5 spacing on hollow anchor tube 1, namely step pitch is 0.8 ~ 1.2m, and grouting pressure is determined according to different stratum conditions; Slip casting process, carry out two sleeve valves 6 slip casting of same cross section, therefrom the forward end slip casting successively of spare anchor pipe 1 bottom, often completes once grouting at every turn simultaneously, the Grouting Pipe that moves up 17 1 step pitch length; 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 the circular protective screening of a center drilling is installed in hollow anchor tube 1 front end; B (), according to the delivery port elevation of the elevation determination equalization of discharge device 13 of hollow anchor tube 1 bottom, lays pedestal at domatic construction equalization of discharge device 13; Equalization of discharge device 13 is placed on pedestal, and is tightly connected with gutter 12; Suction water pipe 10 is entered hollow anchor tube 1 bottom through protective screening centre bore, with joint bend pipe 11, gutter 12 is connected with suction water pipe 10, form syphon;
(5) realize initial siphonic process: inject a certain amount of water in hollow anchor tube 1, the external air exhauster of equalization of discharge device 13, water of bleeding arrives gutter 12 by suction water pipe 10, then enters equalization of discharge device 13, starts initial siphon, stops bleeding.
The flowing of moisture and control procedure in the body of slope of the present invention: when side slope 21 topsoil body burden water raises or rise in Deep Groundwater position, water flows through permeable hole 4 and enters in hollow anchor tube 1, and along wall flow to bottom end closure place, during the delivery port of the water level in hollow anchor tube 1 higher than equalization of discharge device 13, siphonic process occurs, siphon principle is utilized to discharge the water accumulated in hollow anchor tube 1, realize the water level decreasing in hollow anchor tube 1, gradually water in side slope 21 is discharged outside slope, until the water level in hollow anchor tube 1 is identical with the delivery port water level of equalization of discharge device 13, reach the controlling water level 22 of goal-setting, siphonic process temporarily stops, now all remain with fixed level in equalization of discharge device 13 and hollow anchor tube 1, when rainfall next time or other factors to make in side slope 21 moisture increase, repeat said process, after water level rises in hollow anchor tube 1, siphonic process repeats again, makes to be in lower water position status all the time in hollow anchor tube 1.
Claims (9)
1. side slope is from a drainage anchor rod, it is characterized in that: this anchor pole comprises hollow anchor tube (1), ground tackle (15), backing plate (16) and syphon; One end open, one end of hollow anchor tube (1) are closed, filter screen (2) is wrapped up in periphery, screw thread (3) is established in openend, postmedian offers permeable hole (4), back segment is connected with outlet pipe (5) is vertical, the end sleeve of outlet pipe (5) has sleeve valve (6) and soil engineering bag (7), cordage (8) colligation in soil engineering bag (7) is on hollow anchor tube (1), and soil engineering bag (7) is clamped on hollow anchor tube (1) by the both sides anchor ear (9) of outlet pipe (5); Syphon is connected by joint bend pipe (11) one end with gutter (12) by suction water pipe (10), and the other end and the equalization of discharge device (13) of gutter (12) connect and compose; Hollow anchor tube (1) has a down dip and is positioned in the body of slope, keep there is a relative relief at the bottom of the mouth of pipe of hollow anchor tube (1) and pipe, Grouting Pipe (17) is to hollow anchor tube (1) interior slip casing by pressure, slurry (14) solidifies and is anchored in the stable soil body in soil engineering bag (7), and hollow anchor tube (1) leading portion is anchored on backing plate (16) by ground tackle (15); Siphonal suction water pipe (11) to insert in hollow anchor tube (1) and extends bottom, domatic by joint bend pipe (11) and gutter (12) with balance water outlet device (13) and be connected, make the water inlet of suction water pipe (11) identical with balancing water outlet device (13) delivery port elevation; Water filling in hollow anchor tube (1), bleeds from equalization of discharge device (13) with air exhauster, moves the water to flow into equalization of discharge device (13), start initial siphon; When the interior water level of hollow anchor tube (1) rises, real-time draining.
2. side slope according to claim 1 is from drainage anchor rod, it 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 is from drainage anchor rod, it is characterized in that: permeable hole (4) is spaced apart first disc of tube wall being located at hollow anchor tube (1), and permeable hole (4) is not offered within the left and right 0.1 ~ 0.15m of outlet pipe (5), also do not offer permeable hole (4) between hollow anchor tube (1) blind end and an adjacent outlet pipe (5), permeable hole (4) diameter is 5 ~ 10mm.
4. side slope according to claim 1 is from drainage anchor rod, it is characterized in that: outlet pipe (5) is arranged symmetrically with on the same cross section of hollow anchor tube (1), outlet pipe (5) is 0.8 ~ 1.2m at hollow anchor tube (1) axial spacing, and outlet pipe (5) diameter is 10 ~ 15mm.
5. side slope according to claim 1 is from drainage anchor rod, it is characterized in that: Grouting Pipe (17) is provided with two stop grouting plugs (18) and grouting tube (19), grouting tube (19) length is 0.1 ~ 0.15m.
6. side slope according to claim 1 is from drainage anchor rod, it is characterized in that: suction water pipe (10), gutter (12) internal diameter≤6mm; The bending angle of joint bend pipe (11) is 120 ° ~ 150 °.
7. side slope according to claim 1 is from drainage anchor rod, it is characterized in that: the mouth of pipe of hollow anchor tube (1) and the relative relief at the bottom of pipe are less than 7m.
8. side slope according to claim 1 is from drainage anchor rod, it is characterized in that: sleeve valve (6) is rubber sleeve valve.
9. side slope is from the construction method of drainage anchor rod, the steps include:
(1) investigate and analyse side slope (21) geological conditions, hydrometeorological condition, understand the supply of side slope (21) earth's surface and underground water, runoff and discharge regime, carry out engineer geological prospecting and design, analyze potential water use (20) position determining to come down;
(2) hollow anchor tube (1) is made: the length determining hollow anchor tube (1) according to step (1), the number of soil engineering bag (7); Steel pipe front end machining screw (3), rear end entity is closed, and after steel pipe, spacer segment 0.8 ~ 1.2m holes, and vertical welding outlet pipe (5); Offer at first disc of tube wall the permeable hole (4) that aperture is 5 ~ 10mm, within the scope of the left and right 0.1 ~ 0.15m of outlet pipe (5) and between steel pipe blind end and an adjacent outlet pipe (5), do not offer permeable hole (4); Wall spary corrosion resistant coating inside and outside steel pipe, the upper first oversleeve valve (6) of outlet pipe (5), cordage (8) colligation is on steel pipe, and outlet pipe (5) both sides use anchor ear (9) to be fixed on steel pipe by soil engineering bag (7) again, steel pipe periphery parcel 2 ~ 3 metafiltration nets (2);
(3) hole: according to the engineering design degree of depth and angle, in the upper boring of side slope (21);
(4) install from drainage anchor rod: hollow anchor tube (1) is placed in domatic hole by (a), and the semi circular surface of permeable hole (4) upward, segmenting slip casting is carried out by Grouting Pipe (17), every section of slip casting length is slip casting step pitch, slip casting step pitch is identical with outlet pipe (5) spacing on hollow anchor tube (1), namely step pitch is 0.8 ~ 1.2m, and grouting pressure is determined according to different stratum conditions; Slip casting process, carry out two sleeve valves (6) slip casting of same cross section, therefrom the forward end slip casting successively of spare anchor pipe (1) bottom, often completes once grouting at every turn simultaneously, the Grouting Pipe that moves up (17) step pitch length; 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 the circular protective screening of a center drilling is installed in hollow anchor tube (1) front end; B (), according to the delivery port elevation of elevation determination equalization of discharge device (13) of hollow anchor tube (1) bottom, lays pedestal domatic construction equalization of discharge device (13); Equalization of discharge device (13) is placed on pedestal, and is tightly connected with gutter (12); Suction water pipe (10) is entered hollow anchor tube (1) bottom through protective screening centre bore, with joint bend pipe (11), gutter (12) is connected with suction water pipe (10), form syphon;
(5) initial siphonic process is realized: in hollow anchor tube (1), inject a certain amount of water, equalization of discharge device (13) external air exhauster, water of bleeding to gutter (12), then enters equalization of discharge device (13) by suction water pipe (10), start initial siphon, stop bleeding.
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