Double-siphon outlet three-negative-pressure enhanced drainage system utilizing anchor hole and mounting cavity

Abstract

The invention relates to a double-siphon-outlet three-negative-pressure enhanced drainage system using anchor holes and an installation cavity, the drainage system is suitable for slope drainage, the siphon drainage device cavity is divided into a zero-pressure area and a negative-pressure area and is provided with an exhaust pipe, an air-entrapping pipe, a siphon, a front-end control device and other parts, automatic start and stop are ensured, and the drainage efficiency is improved. Meanwhile, air can be prevented from entering the siphon to damage the siphon. The siphon is provided with a U-shaped section and a front-end control device, so that a double-insurance mechanism is realized, and the drainage effect is enhanced by a capillary drainage belt. The drainage system is installed by drilling an existing side slope anchor rod, the cost of additional drilling is reduced, siphoning is sequentially formed on each layer through the switch control valve, and the working efficiency is optimized when multiple layers of drainage are conducted.

Description

Technical Field

[0001] The invention belongs to the technical field of slope drainage, and in particular relates to a double siphon outlet triple negative pressure enhanced drainage system utilizing anchor holes and an installation cavity. Background Art

[0002] Engineering experience shows that rainfall is the main cause of slope instability. For slopes formed during foundation pit construction, construction workers will not only use support structures to support and protect the slopes, but also set up drainage structures to drain water to reduce the situation where rainwater infiltration causes the slope soil to become loose and reduces the stability of the slope support. During the foundation pit excavation process, the formed slopes must be drained in time. If the drainage is not timely, the slope safety will be affected, and then the structural safety and normal operation of the building will be affected.

[0003] The siphon phenomenon is a fluid mechanics principle that occurs in a completely closed pipe. When the flow of liquid in the pipe stops suddenly, due to the negative pressure in the pipe, the liquid will rise from a low place to a high place along the pipe, forming a siphon phenomenon. Those skilled in the art usually use the vacuum method to start the siphon, that is, when starting for the first time, vacuum is drawn from the exhaust pipe to discharge the gas in the siphon pipe; or use the water injection method, that is, water is injected into the tail of the drain pipe. However, both methods cannot achieve automatic start and stop, cannot guarantee a large water flow rate, and cannot guarantee that no air will enter. Summary of the invention

[0004] The purpose of the present invention is to provide a triple negative pressure enhanced drainage system and an installation cavity with double siphon outlets utilizing anchor holes, which solves the problem of being unable to achieve automatic start and stop, can expand the water flow rate, and avoids the problem of siphon destruction caused by air entry.

[0005] The technical solution adopted by the present invention is a double siphon outlet triple negative pressure enhanced drainage system using anchor holes, comprising a siphon drainage device cavity, wherein the siphon drainage device cavity is divided into a zero pressure zone and a negative pressure zone; Furthermore, a zero pressure zone and an atmospheric top cover are arranged above the zero pressure zone, a zero pressure zone and a negative pressure zone top cover are arranged between the zero pressure zone and the negative pressure zone, and an air enlargement plug is arranged between the negative pressure zone and the grouting section; Further, the exhaust pipe 1 passes through the exhaust pipe hole 1 of the zero-pressure zone and atmosphere top cover and the zero-pressure zone and negative-pressure zone top cover, and the exhaust pipe 1 is fixed on the zero-pressure zone and atmosphere top cover and the zero-pressure zone and negative-pressure zone top cover; the exhaust pipe 2 passes through the exhaust pipe hole 2 of the zero-pressure zone and atmosphere top cover, and the exhaust pipe 2 is fixed on the zero-pressure zone and atmosphere top cover; Further, the gas filling pipe passes through the gas filling pipe holes on the top cover between the zero pressure zone and the atmosphere and the top cover between the zero pressure zone and the negative pressure zone in sequence, and the gas filling pipe is fixed on the top cover between the zero pressure zone and the atmosphere and the top cover between the zero pressure zone and the negative pressure zone, and the tail end of the gas filling pipe is inserted into the hole reserved for the gas filling expansion plug; Furthermore, siphon tube one passes through siphon tube hole two on the top cover of the zero pressure zone and the atmosphere, and siphon tube one is fixed on the top cover of the zero pressure zone and the atmosphere, siphon tube two passes through siphon tube hole one on the top cover of the zero pressure zone and the atmosphere and the top cover of the zero pressure zone and the negative pressure zone, and siphon tube two is fixed on the top cover of the zero pressure zone and the atmosphere and the top cover of the zero pressure zone and the negative pressure zone.

[0006] Furthermore, the outside of the zero-pressure zone and the negative-pressure zone of the cavity of the siphon drainage device are respectively wrapped with plastic tubes, the outside of the plastic tube is wrapped with a circle of capillary drainage belt, the gap of the capillary drainage belt is provided with an expansion mud ball, and an annular water retaining device is provided on the outside below the capillary drainage belt, and a circle of herringbone water guiding device and gate-shaped three-sided water retaining device are also alternately provided below the capillary drainage belt.

[0007] Furthermore, the siphon tube 1 is arranged in the zero pressure zone, and the tail ends of the siphon tubes 1 and 2 are both provided with U-shaped sections, the top of the U-shaped sections is provided with a front end control device, and a one-way switch paddle is also provided behind the front end control device.

[0008] Furthermore, the front-end control device includes a plastic float, a hollow large ball and a solid iron ball. A vertical channel for the solid iron ball to move is arranged inside the hollow large ball along the diameter direction. The plastic float and the solid iron ball are connected by a thin wire. A baffle with holes is also arranged above the front-end control device.

[0009] Furthermore, the aerated expansion plug is divided into three sections, the upper and lower sections are metal sections, and the middle section is a rubber section. The upper and lower metal sections both have holes reserved for the grouting pipe and the return grouting pipe, and the upper metal section also has a hole reserved for the aerated pipe. Furthermore, the grouting pipe passes through the grouting pipe holes of the zero-pressure zone and atmospheric top cover and the zero-pressure zone and negative-pressure zone top cover and the holes reserved in the metal part of the aerated expansion plug in sequence, and fixes the grouting pipe on the zero-pressure zone and atmospheric top cover and the zero-pressure zone and negative-pressure zone top cover and the metal part of the aerated expansion plug.

[0010] Furthermore, the return slurry pipe passes through the return slurry pipe holes on the top cover between the zero pressure zone and the atmosphere and the top cover between the zero pressure zone and the negative pressure zone in sequence, and the holes reserved in the metal part of the aerated expansion plug, and the return slurry pipe is fixed on the metal part of the aerated expansion plug and the top cover between the zero pressure zone and the atmosphere and the top cover between the zero pressure zone and the negative pressure zone.

[0011] Furthermore, exhaust pipe 1 and exhaust pipe 2 are both provided with exhaust valves at one end outside the cavity of the siphon drainage device.

[0012] Another technical solution adopted by the present invention is an installation cavity of a three-negative-pressure enhanced drainage system with double siphon outlets utilizing anchor holes. The three-negative-pressure enhanced drainage system with double siphon outlets utilizing anchor holes is installed in a cavity where a siphon drainage device is placed. Siphon tube one and siphon tube two on the same layer are connected in series. Siphon tube one and siphon tube two are respectively installed with a zero-pressure distinguishing control valve and a negative-pressure distinguishing control valve at the outlet of the cavity where the siphon drainage device is placed, the layers are connected in parallel, and each layer is provided with a total switch control valve. A water tank is provided at the end of the connected siphon tubes, and a water tank drainage pipe is also provided on the water tank.

[0013] Furthermore, the cavity for placing the siphon drainage device is a hole drilled in the slope for installing anchor rods, and the anchor rods pass through the anchor rod holes on the top cover between the zero pressure zone and the atmosphere and the top cover between the zero pressure zone and the negative pressure zone, and the anchor rods are fixed on the top cover between the zero pressure zone and the atmosphere and the top cover between the zero pressure zone and the negative pressure zone; the anchor rod includes a free section and an anchoring section, the anchoring section is fixed in the slope, and a waist beam is also provided on the free section.

[0014] The beneficial effects of the present invention are: 1. The present invention realizes the process of injecting water from the water tank at the end of the siphon pipe into the siphon pipe to form a siphon and discharge the accumulated water in the slope by forward flow, so that the siphon drainage of the slope is no longer affected by the water outlet height at the rear end.

[0015] 2. The present invention arranges double floats and double insurance mechanisms at the front water inlet, which can effectively ensure that the siphon is not damaged.

[0016] 3. The present invention sets a negative pressure zone to further enhance the drainage effect.

[0017] 4. The present invention utilizes the holes drilled by the anchor rods for the slope anchoring support, and does not need to drill additional holes on the slope surface for the drainage device, thus reducing labor and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is the general layout diagram of the siphon drainage pipe.

[0020] Figure 2 It is a detailed diagram of the negative pressure zone of the present invention.

[0021] Figure 3 It is a side view of the door-shaped three-sided water retaining device of the present invention when it is closed.

[0022] Figure 4 It is a side view of the door-shaped three-sided water retaining device of the present invention when it is opened.

[0023] Figure 5 It is a cross-sectional view of the gate-shaped three-sided water retaining device and the herringbone-shaped water guiding device when the switch control valve of the present invention is opened.

[0024] Figure 6 It is a cross-sectional view of the gate-shaped three-sided water retaining device and the herringbone-shaped water guiding device when the switch control valve of the present invention is closed.

[0025] Figure 7 It is a structural schematic diagram of the humanoid water guiding device of the present invention.

[0026] Figure 8 It is a structural detail diagram of the front-end control device of the present invention.

[0027] Fig. 9 It is a schematic diagram of the zero pressure zone and atmospheric cover structure of the present invention.

[0028] Fig.10 It is a schematic diagram of the top cover structure of the zero pressure zone and the negative pressure zone of the present invention.

[0029] Fig.11 Schematic diagram of the anchor rod structure of the present invention.

[0030] Fig.12 It is a schematic diagram of slope layout of the present invention.

[0031] In the figure, 1. exhaust pipe 1, 2. grouting pipe, 3. grouting pipe, 4. anchor rod, 5. exhaust pipe 2, 6. gas pipe, 7. siphon pipe 1, 8. siphon pipe 2, 9. zero pressure zone and atmospheric cover, 10. zero pressure zone and negative pressure zone cover, 11. gas expansion plug, 12. annular water retaining device, 13. capillary drainage belt, 14. expansion mud ball, 15. gate-shaped three-sided water retaining device, 16. plastic pipe, 17. herringbone water guide device, 18. siphon drainage device cavity, 19. plastic float, 20. hollow large ball, 21. solid iron ball , 22. Front-end control device, 23. Exhaust pipe hole one, 24. Grouting pipe hole, 25. Back-grouting pipe hole, 26. Anchor hole, 27. Exhaust pipe hole two, 28. Gas pipe hole, 29, Siphon pipe hole one, 30 Siphon pipe hole two, 31. Anchor section, 32. Free section, 33. Waist beam, 34. Siphon drainage device placement cavity, 35-1. Switch main control valve, 35-2. Zero pressure differentiation control valve, 35-3. Negative pressure differentiation control valve, 36. Water tank, 37. One-way switch paddle, 38. Water tank drainage pipe, 39. Baffle with holes. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 12 As shown, an embodiment of the present invention provides a double siphon outlet three-negative pressure enhanced drainage system and an installation cavity utilizing anchor holes, including a siphon drainage device cavity 18, wherein the siphon drainage device cavity 18 is divided into a zero pressure zone and a negative pressure zone, and the portion inserted into the slope and in direct contact with the soil is a grouting section.

[0034] The zero pressure zone is connected to the atmosphere. Since this drainage system uses water pressure from the rear end of the siphon tube, the air in the tube body of the negative pressure zone and the zero pressure zone is completely discharged, thereby starting the siphon.

[0035] A zero pressure zone and an atmospheric top cover 9 are provided above the zero pressure zone. Fig. 9 As shown, it is possible to prevent soil from entering the siphon drainage device cavity 18 and causing blockage; a zero pressure zone and a negative pressure zone top cover 10 are provided between the zero pressure zone and the negative pressure zone, as shown in FIG. Fig.10 As shown, it is used to isolate the zero pressure zone and the negative pressure zone; an air-enlarging plug 11 is provided between the negative pressure zone and the grouting section to isolate the negative pressure zone and the grouting section.

[0036] The exhaust pipe 1 passes through the exhaust pipe hole 23 of the zero-pressure zone and atmosphere top cover 9 and the zero-pressure zone and negative-pressure zone top cover 10, and the exhaust pipe 1 is fixed on the zero-pressure zone and atmosphere top cover 9 and the zero-pressure zone and negative-pressure zone top cover 10. The tail end of the exhaust pipe 1 is arranged at the top of the negative-pressure zone. When water enters the negative-pressure zone cavity, the exhaust pipe 1 can discharge the gas in the negative-pressure zone out of the siphon drainage device cavity 18.

[0037] The exhaust pipe 25 passes through the exhaust pipe hole 27 of the zero-pressure zone and the atmospheric top cover 9, and the exhaust pipe 25 is fixed on the zero-pressure zone and the atmospheric top cover 9. The tail end of the exhaust pipe 25 is set at the top of the zero-pressure zone. When water enters the zero-pressure zone cavity, the exhaust pipe 25 can discharge the gas in the zero-pressure zone out of the siphon drainage device cavity 18.

[0038] The exhaust pipe 1 and the exhaust pipe 2 5 are both provided with an exhaust valve at one end outside the cavity 18 of the siphon drainage device. After the gas is completely discharged, the exhaust valve is manually closed to prevent air from entering the zero pressure zone and the negative pressure zone to destroy the siphon.

[0039] The aerated expansion plug 11 is divided into three sections, the upper and lower sections are metal sections, and the middle section is a rubber section. The upper and lower metal sections both have holes reserved for the grouting pipe 2 and the return grout pipe 3, and the upper metal section also has a hole reserved for the aeration pipe 6.

[0040] The grouting pipe 2 passes through the grouting pipe holes 24 of the zero-pressure zone and atmospheric top cover 9 and the zero-pressure zone and negative pressure zone top cover 10 and the reserved holes of the metal part of the aerated expansion plug 11 in sequence, and the grouting pipe 2 is fixed on the zero-pressure zone and atmospheric top cover 9 and the zero-pressure zone and negative pressure zone top cover 10 and the metal part of the aerated expansion plug 11. The grouting section can press cement slurry through the grouting pipe 2, and the cement slurry penetrates into the soil along the gap to fill the gap, so that it is completely sealed, promotes soil consolidation, thereby improving the soil strength of the grouting area, and preventing fracture, displacement, and deformation.

[0041] The return slurry pipe 3 passes through the return slurry pipe hole 25 on the zero pressure zone and atmospheric top cover 9 and the zero pressure zone and negative pressure zone top cover 10 and the reserved hole of the metal part of the aerated expansion plug 11 in sequence, and the return slurry pipe 3 is fixed on the metal part of the aerated expansion plug 11 and the zero pressure zone and atmospheric top cover 9 and the zero pressure zone and negative pressure zone top cover 10. The return slurry pipe 3 can discharge the cement slurry overflowing from the grouting section out of the pipe body of the drainage system.

[0042] The gas-filling pipe 6 passes through the gas-filling pipe holes 28 on the zero-pressure zone and atmosphere top cover 9 and the zero-pressure zone and negative-pressure zone top cover 10 in sequence, and the gas-filling pipe 6 is fixed on the zero-pressure zone and atmosphere top cover 9 and the zero-pressure zone and negative-pressure zone top cover 10. The tail end of the gas-filling pipe 6 is inserted into the hole reserved for the gas-filling expansion plug 11 and communicated with the rubber section of the gas-filling expansion plug 11. The gas-filling pipe 6 is provided with a switch valve, which is opened during gas-filling and closed after gas-filling is completed. The gas-filling pipe 6 can be inflated by an external gas-filling device, so that the rubber in the space of the rubber section of the gas-filling expansion plug 11 is inflated to isolate the grouting section and the negative-pressure zone.

[0043] The siphon tube 7 is arranged in the zero pressure zone, passes through the siphon tube hole 2 30 on the zero pressure zone and the atmospheric top cover 9, and is fixed on the zero pressure zone and the atmospheric top cover 9. The siphon tube 7 is used to discharge water from the zero pressure zone. A U-shaped section is arranged at the tail end of the siphon tube 7, a front end control device 22 is arranged at the top of the U-shaped section, and a one-way switch paddle 37 is arranged behind the front end control device.

[0044] The siphon tube 28 passes through the siphon hole 29 on the zero-pressure zone and atmosphere top cover 9 and the zero-pressure zone and negative-pressure zone top cover 10, and the siphon tube 28 is fixed on the zero-pressure zone and atmosphere top cover 9 and the zero-pressure zone and negative-pressure zone top cover 10. The siphon tube 28 is used to discharge water from the negative-pressure zone. A U-shaped section is also provided at the tail end of the siphon tube 28, and the U-shaped section is located in the negative-pressure zone. A front-end control device 22 is also provided on the top of the U-shaped section, and a one-way switch paddle 37 is also provided behind the front-end control device.

[0045] The anchor rod 4 passes through the anchor rod hole 26 on the zero pressure zone and atmospheric cover 9 and the zero pressure zone and negative pressure zone cover 10, and fixes the anchor rod 4 on the zero pressure zone and atmospheric cover 9 and the zero pressure zone and negative pressure zone cover 10; the anchor rod 4 is inserted into the slope, and grouting is performed through the grouting pipe 2 to fix the anchor rod 4. The anchor rod 4 includes a free section 32 and an anchoring section 31. The free section 32 is not constrained by the grouting cement and can be used to apply prestress. The anchoring section 31 is fixed in the slope, and the anchor rod 4 supports the slope; a waist beam 33 is also provided on the free section 32. The waist beam 33 can fix the anchor rod 4 on the slope and transmit the anchoring force to the slope, thereby improving the stability of the anchor rod 4 support.

[0046] The front-end control device 22 includes a plastic float 19, a hollow large ball 20 and a solid iron ball 21. A vertical channel for the solid iron ball 21 to move is arranged inside the hollow large ball 20 along the diameter direction. The solid iron ball 21 can move up and down in this channel. The plastic float 19 and the solid iron ball 21 are connected by a thin wire. The size of the opening of the hollow large ball 20 is slightly smaller than the diameter of the solid iron ball 21, which can ensure that the solid iron ball 21 is always in the hollow large ball 20; a perforated baffle 39 with holes is also arranged above the front-end control device 22, which can ensure that the hollow large ball 20 is always inside the front-end control device 22.

[0047] In this embodiment, the entire drainage system is installed Fig.12 The siphon drainage device shown is placed in the cavity 34. After the drainage system is installed, it needs to be pressurized and filled with water once, so that the zero pressure area and negative pressure area of ​​the siphon drainage device cavity 18 form a siphon. There is no need to fill water again. At the same time, it also ensures that air will not enter the siphon drainage device cavity 18 through the siphon pipe to destroy the siphon, and the automatic start and stop of the drainage device can be realized. When pressurizing and filling water, the water needs to fill the entire siphon drainage device cavity 18. At this time, the water flow direction is as follows: Figure 8 As shown in the figure, the direction of water flow after the siphon is formed is Figure 8 on the contrary.

[0048] When the water level in the cavity 18 of the siphon drainage device rises, the original gas in the zero-pressure zone and the negative-pressure zone is discharged into the air through the exhaust pipe 25 and the exhaust pipe 1 respectively. At the same time, the buoyancy of the water drives the plastic float 19 to float upward, and the plastic float 19 drives the solid iron ball 21 to gradually move up to the top of the hollow big ball, and then drives the hollow big ball 20 to move upward, so that the front-end control device 22 is turned on. When water overflows from the exhaust pipe 1 or the exhaust pipe 25, the corresponding exhaust valve is closed, and the siphon drainage is started, and the water level gradually drops.

[0049] When the water level drops, the buoyancy of the water gradually decreases. When the gravity of the solid iron ball 21 is greater than the buoyancy of the plastic float 19, the solid iron ball 21 drives the plastic float 19 to move downward. When the solid iron ball 21 sinks to the bottom of the hollow big ball 20, the hollow big ball 20 is also gradually driven by the solid iron ball 21 to the bottom of the front control device 22, so that the front control device 22 is closed. At this time, the function of automatically starting and stopping drainage is completed. Before the hollow big ball 20 falls to the bottom of the front control device 22, the bottom of the front control device 22 will not be closed immediately, which reduces the problem of repeated opening and closing of the switch, and to a certain extent prolongs the service life of the accessories.

[0050] The bottom of the U-shaped section at the tail end of the siphon tube 1 7 and the siphon tube 2 8 is also provided with an upward vertical channel and a float. A one-way switch paddle 37 is also provided at the bottom of the channel. One end of the one-way switch paddle 37 is fixed to the siphon tube 1 7 and the siphon tube 2 8 through a pin and a pin hole welded on the siphon tube, and the other end is connected to the float through a thin wire. Similar to the front-end control device 22, when the water level rises, the float moves upward due to the buoyancy of the water, driving the one-way switch paddle 37 to open. When the water level drops, the one-way switch paddle 37 pulls the float downward until the one-way switch paddle 37 is closed, ensuring that the front-end control device 22 opens the water level > the front-end control device 22 closes the water level > the one-way switch paddle 37 closes the water level. The front-end control device 22 and the one-way switch paddle 37 form a dual control mechanism to achieve double insurance, thereby ensuring that the siphon is not destroyed.

[0051] The outside of the zero pressure zone and the negative pressure zone of the cavity 18 of the siphon drainage device are respectively wrapped with plastic tubes 16, and the outside of the plastic tube 16 is wrapped with a circle of capillary drainage belt 13, and the gap of the capillary drainage belt 13 is provided with expansion mud balls 14, and the expansion mud balls 14 are used to fill the gap of the capillary drainage belt 13. An annular water retaining device 12 is arranged on the outside below the capillary drainage belt 13, and a circle of herringbone water guide devices 17 and gate-shaped three-sided water retaining devices 15 are alternately arranged below the capillary drainage belt 13. The capillary drainage belt 13 in the zero pressure zone can collect water in the soil and gather the water to the bottom of the normal pressure zone, and the capillary drainage belt 13 in the negative pressure zone collects water and gathers the water to the bottom of the negative pressure zone.

[0052] The annular water retaining device 12 allows the water collected in the capillary drainage belt 13 to flow into the siphon drainage device cavity 18. A switch valve is provided between the plastic pipe 16 and the bottom of the capillary drainage belt 13. Figures 5 and 6 When water enters the capillary drainage belt 13, the water flow first gathers at the annular water retaining device 12 below the capillary drainage belt 13. When the water pressure at the annular water retaining device 12 is greater than the water pressure in the siphon drainage device cavity 18, the water flow pushes the baffle of the gate-shaped three-sided water retaining device 15 and collects the water into the siphon drainage device cavity 18.

[0053] The herringbone water guide device 17 is a structure of a triangular prism plus a rectangular parallelepiped, such as Figure 7 As shown, water can flow downward through the two sides of the triangle, which can prevent water flow blockage and play a water-guiding role.

[0054] The gate-shaped three-sided water retaining device 15 is provided with three baffles in total, the middle baffle is connected to the inner side of the capillary drainage belt 13, and the baffles on both sides are fitted with one side of the rectangular part of the herringbone water guiding device 17 and the lower ends are connected to the rectangular part; when the water pressure in the siphon drainage device cavity 18 is greater than the water pressure at the annular water retaining device 12, the middle baffle of the gate-shaped three-sided water retaining device 15 is pushed by the water flow to resist the protrusion on the annular water retaining device 12, and the baffles on both sides are also resisted by the rectangular part of the herringbone water guiding device 17, which can effectively prevent water backflow.

[0055] The zero pressure zone is a transient saturated zone. When it rains, rainwater gradually penetrates from the soil surface into the deeper soil. The water content in the soil where the zero pressure zone is located gradually increases. At this time, the zero pressure zone can quickly drain the water to prevent a large amount of water from entering the deeper soil and destroying the slope structure. The deeper negative pressure zone can drain a small amount of water that enters the deep soil layer, further protecting the soil structure of the slope.

[0056] There are multiple layers of siphon drainage device placement cavities 34 on the same layer on the slope, such as Fig.12 As shown, the siphon drainage device cavity 18 is installed in the siphon drainage device placement cavity 34, the siphon tube 1 7 and the siphon tube 2 8 are connected in series, and the siphon tube 1 7 and the siphon tube 2 8 are respectively installed with a zero-pressure differentiation control valve 35-2 and a negative-pressure differentiation control valve 35-3 at the outlet near the siphon drainage device placement cavity 34. The layers are connected in parallel, and each layer is provided with a switch main control valve 35-1.

[0057] When pressurizing and filling water into the water tank 36, first open all the switch control valves of the bottom layer, and close the switch control valves of the other layers. After the siphon is formed in the cavity 18 of the siphon drainage device, close the corresponding zero pressure distinction control valve 35-2 and negative pressure distinction control valve 35-3. After the siphon is formed in the cavity 18 of the siphon drainage device at the farthest end of this layer, the switch master control valve 35-1 of this layer is also closed. Then open the switch master control valve 35-1 of the upper layer, repeat the above operation until the siphon is formed in the cavity 18 of all siphon drainage devices, then open the water tank drainage pipe 38, open all the switch controls of the bottom layer, so that all the drainage devices at the bottom layer complete the first siphon drainage, and complete the first siphon drainage of all drainage devices in sequence. After that, there is no need to pressurize and fill water again, and the automatic start and stop of siphon drainage can be realized.

[0058] By switching the control valves to form a siphon in sequence, overflow of the nearby holes or failure to form a siphon in the farthest siphon drainage device cavity 18 can be avoided. At the same time, backflow will not occur due to the upper pressure being greater than the lower pressure. The siphon tubes extending from the holes on each layer of the slope are connected in series and then each layer is connected in parallel, and finally all the water is collected in the water tank 36 at the end, which reduces the number of water tanks and saves costs. Placing the water tank 36 at the bottom of the slope can also ensure that the siphon water flows out smoothly.

[0059] During the foundation pit construction process, the construction workers will use anchor rods 4 to support and protect the slopes formed. In this embodiment, the siphon drainage device placement cavity 34 is the hole drilled when the anchor rod 4 is installed. The drainage device is installed using this anchor hole, avoiding drilling again.

[0060] Before grouting, the aerated expansion plug 11 is aerated through the aerated pipe 6. Due to the air pressure, the aerated expansion plug 11 is deformed outward and inward. It expands outward to squeeze the slope hole wall and deforms inward to squeeze the corrugated free section of the anchor rod 4 to ensure that the slurry does not enter the siphon drainage device cavity 18.

[0061] During grouting, cement slurry is ejected from the bottom of the hole through the grouting pipe 2, filling all the pores in the hole from bottom to top, and squeezing the gas in the hole out of the slope hole from the return grout pipe 3 first, and finally the cement slurry is discharged through the return grout pipe 3. In addition, the cement slurry fed into the hole is squeezed into the cracks of the slope soil body under the action of the grouting pressure, and after solidification with the rock and soil body, a complete anchor body will be formed. At this time, a free section 32 cavity is formed, which is occupied by the siphon drainage device cavity 18. In order to prevent the corrugated pipe from corrosion and extend the service life, the prior art injects normal pressure cement slurry into the free section cavity.

[0062] In this embodiment, the pressure in the zero pressure area is the same as the atmospheric pressure, and the pressure in the negative pressure area is less than the atmospheric pressure.

[0063] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A double siphon outlet triple negative pressure enhanced drainage system using anchor holes, characterized in that: It comprises a siphon drainage device cavity (18), wherein the siphon drainage device cavity (18) is divided into a zero pressure zone and a negative pressure zone; A zero pressure zone and atmospheric top cover (9) is arranged above the zero pressure zone, a zero pressure zone and negative pressure zone top cover (10) is arranged between the zero pressure zone and the negative pressure zone, and an air enlargement plug (11) is arranged between the negative pressure zone and the grouting section; The exhaust pipe 1 (1) passes through the exhaust pipe hole 1 (23) of the zero-pressure zone and atmosphere top cover (9) and the zero-pressure zone and negative-pressure zone top cover (10), and the exhaust pipe 1 (1) is fixed on the zero-pressure zone and atmosphere top cover (9) and the zero-pressure zone and negative-pressure zone top cover (10); the exhaust pipe 2 (5) passes through the exhaust pipe hole 2 (27) of the zero-pressure zone and atmosphere top cover (9), and the exhaust pipe 2 (5) is fixed on the zero-pressure zone and atmosphere top cover (9); The gas filling pipe (6) passes through the gas filling pipe holes (28) on the zero pressure zone and atmosphere top cover (9) and the zero pressure zone and negative pressure zone top cover (10) in sequence, and the gas filling pipe (6) is fixed on the zero pressure zone and atmosphere top cover (9) and the zero pressure zone and negative pressure zone top cover (10), and the tail end of the gas filling pipe (6) is inserted into the hole reserved by the gas filling expansion plug (11); The siphon tube 1 (7) passes through the siphon tube hole 2 (30) on the zero pressure zone and atmosphere top cover (9), and the siphon tube 1 (7) is fixed on the zero pressure zone and atmosphere top cover (9). The siphon tube 2 (8) passes through the siphon tube hole 1 (29) on the zero pressure zone and atmosphere top cover (9) and the zero pressure zone and negative pressure zone top cover (10), and the siphon tube 2 (8) is fixed on the zero pressure zone and atmosphere top cover (9) and the zero pressure zone and negative pressure zone top cover (10).

2. A double siphon outlet triple negative pressure enhanced drainage system using anchor holes according to claim 1, characterized in that: The outsides of the zero-pressure zone and the negative-pressure zone of the cavity (18) of the siphon drainage device are respectively wrapped with plastic tubes (16); the outside of the plastic tube (16) is wrapped with a circle of capillary drainage belt (13); an expansion mud ball (14) is arranged in the gap of the capillary drainage belt (13); an annular water retaining device (12) is arranged on the outside below the capillary drainage belt (13); and a circle of herringbone-shaped water guide devices (17) and gate-shaped three-sided water retaining devices (15) are alternately arranged below the capillary drainage belt (13).

3. According to claim 1, a double siphon outlet triple negative pressure enhanced drainage system using anchor holes is characterized in that: The siphon tube 1 (7) is arranged in the zero pressure zone, and the tail ends of the siphon tube 1 (7) and the siphon tube 2 (8) are both provided with a U-shaped section, the top of the U-shaped section is provided with a front end control device (22), and a one-way switch paddle (37) is also provided behind the front end control device.

4. According to claim 3, a double siphon outlet triple negative pressure enhanced drainage system using anchor holes is characterized in that: The front end control device (22) comprises a plastic float (19), a hollow large ball (20) and a solid iron ball (21); a vertical channel for the solid iron ball (21) to move is provided inside the hollow large ball (20) along the diameter direction; the plastic float (19) and the solid iron ball (21) are connected by a thin wire; and a baffle plate (39) with holes is also provided above the front end control device (22).

5. According to claim 1, the triple negative pressure enhanced drainage system using double siphon outlets with anchor holes is characterized in that: The aerated expansion plug (11) is divided into three sections, the upper and lower sections are metal sections, and the middle section is a rubber section. The upper and lower metal sections both have holes reserved for the grouting pipe (2) and the return grout pipe (3), and the upper metal section also has a hole reserved for the aerated pipe (6).

6. According to claim 5, a double siphon outlet triple negative pressure enhanced drainage system using anchor holes is characterized in that: The grouting pipe (2) sequentially passes through the grouting pipe holes (24) of the zero-pressure zone and atmospheric top cover (9) and the zero-pressure zone and negative-pressure zone top cover (10) and the holes reserved in the metal part of the aerated expansion plug (11), and the grouting pipe (2) is fixed on the zero-pressure zone and atmospheric top cover (9) and the zero-pressure zone and negative-pressure zone top cover (10) and the metal part of the aerated expansion plug (11).

7. According to claim 5, a double siphon outlet triple negative pressure enhanced drainage system using anchor holes is characterized in that: The return slurry pipe (3) passes through the return slurry pipe holes (25) on the top cover (9) between the zero pressure zone and the atmosphere and the top cover (10) between the zero pressure zone and the negative pressure zone and the reserved holes in the metal part of the aerated expansion plug (11) in sequence, and the return slurry pipe (3) is fixed to the metal part of the aerated expansion plug (11) and the top cover (9) between the zero pressure zone and the atmosphere and the top cover (10) between the zero pressure zone and the negative pressure zone.

8. According to claim 1, a double siphon outlet triple negative pressure enhanced drainage system using anchor holes is characterized in that: The exhaust pipe 1 (1) and the exhaust pipe 2 (5) are both provided with an exhaust valve at one end outside the siphon drainage device cavity (18).

9. An installation cavity for a triple negative pressure enhanced drainage system with double siphon outlets using anchor holes, characterized in that: A double siphon outlet triple negative pressure enhanced drainage system using anchor holes is installed in a siphon drainage device placement cavity (34), wherein siphon pipe 1 (7) and siphon pipe 2 (8) on the same layer are connected in series, and siphon pipe 1 (7) and siphon pipe 2 (8) are respectively installed with a zero pressure differentiation control valve (35-2) and a negative pressure differentiation control valve (35-3) at the outlet of the siphon drainage device placement cavity (34), and the layers are connected in parallel, and each layer is provided with a switch master control valve (35-1), and a water tank (36) is provided at the end of the connected siphon pipes, and a water tank drainage pipe (38) is also provided on the water tank (36).

10. The installation cavity of the triple negative pressure enhanced drainage system with double siphon outlets using anchor holes according to claim 9, characterized in that: The hole drilled in the slope for installing the anchor rod (4) is used as a siphon drainage device to place the cavity (34); the anchor rod (4) passes through the anchor rod hole (26) on the zero pressure zone and atmospheric top cover (9) and the zero pressure zone and negative pressure zone top cover (10), and the anchor rod (4) is fixed on the zero pressure zone and atmospheric top cover (9) and the zero pressure zone and negative pressure zone top cover (10); the anchor rod (4) includes a free section (32) and an anchoring section (31); the anchoring section (31) is fixed in the slope, and the free section (32) is also provided with a waist beam (33).

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