Grouting pipe and construction method for desert water storage area

Abstract

Disclosed in the present invention are a grouting pipe and a construction method for a desert water storage area. An isolation layer can be constructed in any desert area to form a water storage area. The present invention is not limited by desert terrain, thus expanding the range of application. A plurality of anchoring claws are provided between an inner pipe and an outer pipe of a pipe body; and elastic pouch structures used for pushing the anchoring claws outwards are provided, and each anchoring claw has a grouting flow channel, which can be used for grouting into surrounding sand grains. When the grouting pipe is laid, the anchoring claws are stored and do not affect the movement of the grouting pipe. During grouting, the elastic pouch structures support the anchoring claws, such that the anchoring claws swing outwards through openings in the outer pipe, and the anchoring claws are deeply inserted into surrounding sand grains and perform grouting into the surrounding sand grains; the pipe body can be firmly anchored in the sand grains; slurry sprayed out of the anchoring claws has moved a certain distance away from the pipe body, with a wider flow range in the sand grains, and can meet and condense with slurry from other surrounding drilled holes, thereby facilitating the better formation of an isolation layer and thus forming a desert water storage area.

Description

A construction method for grouting pipes and desert water storage areas

[0001] This application claims priority to Chinese Patent Application No. 202410487067.6, filed on April 23, 2024, the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] This invention relates to the field of desert control technology, and in particular to a grouting pipe and a construction method for desert water storage areas. Background Technology

[0003] The surface of the desert is entirely composed of sand, making it difficult to retain water. In addition, the desert region receives very little rainfall, resulting in very few plants. This makes it impossible to stabilize the sand, and the sand is highly mobile, which easily leads to sandstorms and other sand disasters.

[0004] Current technologies primarily employ methods such as sand fixation, planting grass and trees to manage sand disasters. However, since water is difficult to store in desert areas, supplying water to surface vegetation becomes a major challenge.

[0005] In the prior art, for example, Chinese invention patent CN109923966A discloses a method for desert water storage and planting transformation. The method involves selecting a low-lying area in the desert as a reservoir, laying impermeable boards at the bottom of the reservoir, placing a water tank at the bottom, covering the top of the water tank with a filter layer, and extending a pumping pipe upwards from the water tank. After installing the water tank, impermeable boards are laid inside the reservoir, and sand is backfilled until the sand level inside the reservoir is close to the surrounding sand level.

[0006] The aforementioned desert water storage and planting methods require selecting reservoirs based on the desert's topography. Reservoirs can only be located in low-lying areas of the desert, which imposes strict conditions and limits their applicability. If planting vegetation and constructing reservoirs are needed on flat areas or high slopes in the desert, these methods will not meet the requirements.

[0007] To construct a reservoir on flat ground or a high slope, it is necessary to combine drilling and grouting techniques to create an isolation layer a certain distance below the desert surface. Due to the loose texture and poor anchoring properties of sand, existing grouting pipes are insufficient to meet the grouting requirements of desert areas.

[0008] In the prior art, Chinese utility model patent with announcement number CN201679505U discloses a balanced grouting pipe, which is composed of an inner pipe and an outer pipe, with an interlayer formed between the inner and outer pipes, and several grouting holes are provided on the walls of both the inner and outer pipes.

[0009] Because the outer pipe of the balanced grouting pipe has a smooth structure, it is difficult to anchor it in the sand. In addition, since grouting can only be done through the grouting holes on the pipe wall, the grout will be completely absorbed by the sand before it flows a long distance after leaving the grouting pipe and entering the sand. The grout accumulates near the pipe wall and is difficult to form an effective isolation layer.

[0010] Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a construction method for a grouting pipe and a desert water storage area. Multiple anchoring claws are configured between the inner and outer pipes of the pipe body, and an elastic bladder structure is provided to push the anchoring claws outward. The anchoring claws have grouting channels for injecting grout into the surrounding sand. During the laying of the grouting pipe, the retraction of the anchoring claws does not affect the movement of the grouting pipe. During grouting, the elastic bladder structure supports the anchoring claws, causing them to swing outward through the opening of the outer pipe. The anchoring claws deeply insert into the surrounding sand and inject grout into it. The pipe body can be firmly anchored in the sand. The grout sprayed from the anchoring claws has already traveled a distance from the pipe body, allowing for a wider flow range within the sand. It can encounter and solidify with grout from other boreholes in the surrounding area, facilitating the formation of a better isolation layer to create a desert water storage area.

[0012] The present invention provides a grouting pipe, which is used to construct an isolation layer in desert areas to form a desert water storage area above it;

[0013] The grouting pipe includes a flexible pipe body and multiple anchoring claws connected around the pipe body and having grouting channels.

[0014] The pipe body includes an inner pipe and an outer pipe sleeved on the inner pipe, with an annular cavity formed between the inner pipe and the outer pipe. The pipe body includes a proximal end and a distal end arranged opposite to each other, and a distal valve is provided in the distal end of the inner pipe.

[0015] The anchoring claw is installed in the annular cavity via a rotating shaft. The outer tube has an opening in the area corresponding to the anchoring claw, and the anchoring claw can swing outward through the opening of the outer tube.

[0016] An elastic bladder structure capable of driving the anchor claw to swing outward is connected between the anchor claw and the inner tube. The elastic bladder structure is connected to the inner tube and the grouting channel.

[0017] When the elastic bladder structure is in a contracted state, the anchoring claw is housed in the annular cavity and / or the outer tube opening by the action of the elastic bladder structure;

[0018] When grout is injected into the elastic bladder structure and the structure is in an expanded state, the anchoring claws swing outward through the opening of the outer tube. The outwardly swinging anchoring claws are used to insert into the surrounding sand grains and to inject grout into the surrounding sand grains.

[0019] In one of the alternative technical solutions, the anchoring claw includes an anchoring claw body and a plurality of grouting nozzles disposed on the edge of the anchoring claw body, the grouting channel is disposed in the anchoring claw body, and the grouting nozzles are connected to the grouting channel;

[0020] The pivot is located at the distal end of the outer tube opening, the distal end of the anchoring claw body is pivotally connected to the pivot, and the proximal end of the anchoring claw body has a pointed tip.

[0021] When the anchoring claw is in an outward swinging state, the proximal end of the anchoring claw body extends obliquely toward the proximal end of the tube body.

[0022] In one of the alternative technical solutions, after the anchoring claw swings outward through the opening of the outer tube, the proximal end of the tube body is pulled so that the tip of the anchoring claw body is inserted into the surrounding sand grains.

[0023] In one of the alternative technical solutions, the tip has at least one spray nozzle;

[0024] Multiple grouting nozzles are disposed on the outer surface of the main body of the anchoring claw body on the side away from the inner tube.

[0025] In one of the alternative technical solutions, the grouting nozzle includes a main nozzle and a plurality of auxiliary nozzles arranged radially around the main nozzle. The axis of the main nozzle is perpendicular to the outer surface of the main body, and the angle formed between the axis of the auxiliary nozzle and the outer surface of the main body is an acute angle.

[0026] In one alternative technical solution, multiple sets of anchor claw assemblies are provided along the axial direction of the tube body, and each set of anchor claw assemblies includes multiple anchor claws arranged at circumferential intervals along the tube body.

[0027] In one of the alternative technical solutions, the liquid inlet of the elastic bladder structure is connected to the grouting channel of the inner tube, and a first valve is provided in the liquid inlet;

[0028] The outlet of the elastic bladder structure is connected to the grouting channel, and a second valve is provided in the outlet;

[0029] The second valve opens after the first valve opens.

[0030] In one of the alternative technical solutions, the first valve opens when the inner tube is filled with slurry and the pressure reaches a first pressure value;

[0031] When the elastic bladder structure is filled with slurry and the pressure reaches the second pressure value, the second valve opens;

[0032] The second pressure value is greater than the first pressure value.

[0033] In one alternative technical solution, the elastic bladder structure includes an outer plate connected to the anchor claw, an inner plate connected to the inner tube, and an annular elastic bladder connecting the outer plate and the inner plate.

[0034] The liquid inlet is located on the inner plate, and the liquid outlet is located on the outer plate;

[0035] The annular elastic capsule is provided with a reinforcing skeleton.

[0036] The present invention also provides a construction method for a desert water storage area, using the grouting pipe described in any of the aforementioned technical solutions;

[0037] The construction method for the desert water storage area includes the following steps:

[0038] S01: In the desert region, a water storage area is pre-selected, and the number and location of boreholes to be drilled are pre-planned, and the grouting pipes are prepared in advance;

[0039] S02: Using a directional drilling rig, drill a hole below the desert surface and lay the grouting pipe until the distal end of the pipe protrudes above the desert surface, and then close the distal valve; wherein, along the drilling direction of the hole, the distal end of the pipe is in front;

[0040] S03: Grouting begins from the proximal end of the inner tube until the elastic bladder structure pushes the anchoring claw outward;

[0041] S04: Pull the tube body against the opening direction of the anchor claw, so that the anchor claw inserts into the surrounding sand and injects grout into the surrounding sand;

[0042] S05: Repeat steps S02-S04 until drilling, laying of grouting pipes, and grouting are completed at all the preset locations;

[0043] S06: After the slurry and surrounding sand particles solidify, an isolation layer is formed, and a desert water storage area is formed above the isolation layer.

[0044] The above technical solution has the following beneficial effects:

[0045] The grouting pipe and construction method for desert water storage areas provided by this invention can construct an isolation layer to form a water storage area in any region of the desert, without being limited by desert terrain, thus expanding the scope of application.

[0046] The grouting pipe consists of a flexible tube body and multiple anchoring claws. The anchoring claws have grouting channels for injecting grout into the surrounding sand. An outer tube opening corresponds to the area of ​​the anchoring claws on the outer tube. An elastic bladder structure is positioned between the inner tube and the anchoring claws to push the anchoring claws outward. During grouting, the anchoring claws are held in place by the elastic bladder structure without affecting the movement of the grouting pipe. During grouting, the elastic bladder structure expands as it fills with grout, supporting the anchoring claws and causing them to swing outward through the outer tube opening. The anchoring claws deeply penetrate the surrounding sand, injecting grout into it, and the tube body is firmly anchored in the sand. The grout ejected from the anchoring claws has traveled a distance from the tube body, allowing for a wider flow range within the sand. This allows it to meet and solidify with grout from other boreholes in the surrounding area, facilitating the formation of an isolation layer and thus creating a water-retaining area in the desert. Attached Figure Description

[0047] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0048] Figure 1 is a cross-sectional view of a grouting pipe provided in an embodiment of the present invention, wherein the anchoring claw is pulled back by an elastic bladder structure.

[0049] Figure 2 is a cross-sectional view of a grouting pipe provided in an embodiment of the present invention, wherein the anchoring claw is pulled open by an elastic bladder structure;

[0050] Figure 3 is a partial enlarged view of the area in Figure 1 where the anchoring claws and elastic bladder structure are installed;

[0051] Figure 4 is a partial enlarged view of the area in Figure 3 where the inner and outer tubes are installed with anchoring claws and elastic bladder structures.

[0052] Figure 5 is a schematic diagram of the assembly of the anchoring claw and elastic bladder structure;

[0053] Figure 6 is a schematic diagram of the anchoring claws being opened after the grout is injected into the elastic bladder structure and expands.

[0054] Figure 7 is an enlarged view of the grouting nozzle;

[0055] Figure 8 is an enlarged view of the nozzle at the near end of the anchor claw body.

[0056] Figure 9 is a cross-sectional view of the elastic capsule structure;

[0057] Figure 10 is a schematic diagram of the anchoring claws being in the retracted state during the first stage of grouting.

[0058] Figure 11 is a schematic diagram of the anchoring claws being in the open state during another stage of grouting.

[0059] Figure 12 is a schematic diagram of drilling holes and laying grouting pipes below the desert surface in a construction method for a desert water storage area provided by an embodiment of the present invention.

[0060] Figure 13 is a schematic diagram of grouting from the near end of the inner pipe in the construction method of a desert water storage area provided by an embodiment of the present invention;

[0061] Figure 14 is a schematic diagram of the construction method of a desert water storage area provided by an embodiment of the present invention, in which the elastic bladder structure pushes the anchoring claw outward after a stage of grouting.

[0062] Figure 15 is a schematic diagram showing the solidification of grout with surrounding sand particles after grouting is completed in the construction method of a desert water storage area provided by an embodiment of the present invention.

[0063] Figure 16 is a schematic diagram of the cutting off of the proximal and distal ends of the pipe body in the construction method of the desert water storage area provided by an embodiment of the present invention;

[0064] Figure 17 is a cross-sectional view of Figure 12 along the AA direction, showing a schematic diagram of the borehole layout along the direction perpendicular to the grouting pipe.

[0065] Figure 18 is a cross-sectional view of Figure 16 along the BB direction, showing a schematic diagram of the formation of an isolation layer after the grout between adjacent boreholes collects and solidifies in a direction perpendicular to the grouting pipe. Detailed Implementation

[0066] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0067] As shown in Figures 1-6, 10-11 and in conjunction with Figures 12-18, an embodiment of the present invention provides a grouting pipe, which is used to construct an isolation layer 5 in a desert area to form a desert water storage area above it.

[0068] The grouting pipe includes a flexible pipe body 1 and multiple anchoring claws 2 connected around the pipe body 1 and having grouting channels 23.

[0069] The pipe body 1 includes an inner pipe 11 and an outer pipe 12 sleeved on the inner pipe 11. An annular cavity 13 is formed between the inner pipe 11 and the outer pipe 12. The pipe body 1 includes a proximal end and a distal end arranged opposite to each other. A distal valve 14 is provided in the distal end of the inner pipe 11.

[0070] The anchoring claw 2 is installed in the annular cavity 13 via the rotating shaft 15. The outer tube 12 has an outer tube opening 121 in the area corresponding to the anchoring claw 2, and the anchoring claw 2 can swing outward through the outer tube opening 121.

[0071] An elastic bladder structure 3, which can drive the anchor claw 2 to swing outward, is connected between the anchor claw 2 and the inner tube 11. The elastic bladder structure 3 is connected to the inner tube 11 and the grouting channel 23.

[0072] When the elastic bladder structure 3 is in a contracted state, the anchoring claw 2 is housed in the annular cavity 13 and / or the outer tube opening 121 by the action of the elastic bladder structure 3.

[0073] When grout is injected into the elastic bladder structure 3 and it is in an expanded state, the anchoring claw 2 swings outward through the outer tube opening 121. The outwardly swinging anchoring claw 2 is used to insert into the surrounding sand and to inject grout into the surrounding sand.

[0074] The grouting pipe provided by this invention is mainly used in desert areas. It can be used to construct an isolation layer 5 in any area of ​​the desert to form a water storage area, without being limited by desert terrain, thus expanding its scope of application.

[0075] In this invention, the proximal end and the distal end refer to the two opposite ends of a component. The proximal end refers to the end that is closer to the directional drilling rig during construction, and the distal end refers to the end that is farther from the directional drilling rig during construction.

[0076] The slurry used in this invention can be existing cement slurry or microbial slurry. Cement sand fixation technology and microbial sand fixation technology are already relatively mature technologies. The composition of cement slurry and microbial slurry can be referred to the content in the prior art, and will not be repeated here.

[0077] The grouting pipe includes a pipe body 1, multiple anchoring claws 2, and multiple elastic bladder structures 3. The pipe body 1 is a plastic pipe that can bend to conform to the shape of the borehole. The proximal end of the pipe body 1 is used to connect to the directional drilling rig, and the distal end of the pipe body 1 extends out of the borehole onto the desert surface when construction is completed.

[0078] The pipe body 1 includes an inner pipe 11 and an outer pipe 12. The outer pipe 12 is fitted onto the inner pipe 11, and the inner diameter of the outer pipe 12 is larger than the outer diameter of the inner pipe 11, forming an annular cavity 13 between them. A distal valve 14 is provided in the distal end of the inner pipe 11. If necessary, a proximal valve can also be installed in the proximal end of the inner pipe 11. The proximal end of the inner pipe 11 is used for grouting. During grouting, the distal valve 14 is closed to maintain the pressure inside the pipe. The length of the outer pipe 12 is approximately equal to the length of the inner pipe 11, and the proximal and distal ends of the outer pipe 12 can be connected to the proximal and distal ends of the inner pipe 11 through connecting rings.

[0079] The inner tube 11 has multiple grouting ports 110 and multiple wall grooves 111 on its wall. The wall grooves 111 are used to install the elastic bladder structure 3 and provide guidance for the expansion and contraction of the elastic bladder structure 3. Each wall groove 111 has a grouting port 110 at its bottom. The grouting port 110 is connected to the central channel (grouting channel) of the inner tube 11.

[0080] An outer tube opening 121 is provided on the outer side of each tube wall groove 111 on the outer tube 12. The size of the outer tube opening 121 is larger than the size of the anchor claw 2, and the outer tube opening 121 can be used for the anchor claw 2 to pass through.

[0081] A rotating shaft 15 is provided in the annular cavity 13, and the rotating shaft 15 can be connected to the inner tube 11 via a connecting rod 112. The thickness of the annular cavity 13 can be set as needed to meet the requirements for installing the anchor claw 2.

[0082] The outer tube 12 can adopt a split structure so that the elastic bladder structure 3, anchor claw 2 and inner tube 11 are installed first, and then the outer tube 12 is installed last. The two halves of the outer tube 12 can be connected by snaps, clamps or other means.

[0083] The anchoring claw 2 can be made of plastic or metal, and it has a grouting channel 23. The anchoring claw 2 serves both to anchor itself in the sand and to spray grout into the surrounding sand to bind the sand together. One end of the anchoring claw 2 is pivotally connected to a rotating shaft 15, which passes through a through-hole at one end of the anchoring claw 2. The other end of the anchoring claw 2 tapers gradually to form a claw shape, thus providing anchoring. The outlet of the grouting channel 23 is located at the edge of the anchoring claw 2. Several outlets of the grouting channel 23 can be configured along the edge of the anchoring claw 2 to increase the grouting area. Multiple grouting channels 23 can be configured in the anchoring claw 2 as needed.

[0084] The anchor claw 2 is positioned approximately corresponding to the outer tube opening 121. Under normal conditions, the anchor claw 2 is housed within the annular cavity 13 and / or the outer tube opening 121, and does not protrude beyond the outer tube 12, thus not obstructing the laying of the pipe body 1. During grouting, once a certain pressure condition is reached, the anchor claw 2 can be pushed outward by the expanding elastic bladder structure 3, allowing it to rotate around the pivot 15 and swing outward from the outer tube opening 121.

[0085] The elastic bladder structure 3 is a hollow bladder that can be made of rubber. As needed, a skeleton can be incorporated into the rubber material, and / or the thickness and toughness of the rubber material can be increased to enhance its ability to withstand slurry pressure, which can reach up to 10 MPa. Multiple corrugated pleats can be provided on the bladder body or bag body as needed to facilitate the bladder's contraction and expansion.

[0086] Under normal conditions, the elastic bladder structure 3 is in a contracted state, with its main body positioned within the groove 111 of the pipe wall. One end of the elastic bladder structure 3 is connected to the bottom of the groove 111, and its cavity is connected to the grouting port 110. A valve can be installed at the grouting port 110 or the inlet of the cavity, as needed. The other end of the elastic bladder structure 3 is located outside the groove 111 and is connected to the anchoring claw 2. The outlet of the cavity is connected to the inlet of the grouting channel 23. A valve can be installed at the inlet of the grouting channel 23 or the outlet of the cavity, as needed. The valve can be an electric valve or a pressure valve, preferably a pressure valve. The pressure valve can automatically open and close according to the pressure of the grout.

[0087] When the elastic bladder structure 3 is in a contracted state, it pulls the anchor claw 2, causing the anchor claw 2 to be housed in the annular cavity 13 and / or the outer tube opening 121.

[0088] The elastic bladder structure 3 is located on one side of the rotating shaft 15. When grout is injected into the elastic bladder structure 3, the elastic bladder structure 3 begins to expand, thereby pushing the anchor claw 2 to rotate around the rotating shaft 15 and swing outward from the outer tube opening 121. After the elastic bladder structure 3 is completely filled with grout, its swing angle of opening the anchor claw 2 is at its maximum.

[0089] As needed, a baffle 122 is provided at one end of the outer tube opening 121 near the rotating shaft 15, and the baffle 122 partially blocks the rotating shaft 15. When the anchoring claw 2 swings outward to its maximum angle, the anchoring claw 2 contacts the baffle 122, and the baffle 122 limits the movement of the anchoring claw 2. Preferably, the maximum swing angle of the anchoring claw 2 is 30°.

[0090] When the anchoring claw 2 is in an outward swinging state, the grout in the elastic bladder structure 3 is ejected through the outlet of the grouting channel 23. When the anchoring claw 2 is in an outward swinging state, it deeply inserts into the surrounding sand grains, and the pipe body 1 can be firmly anchored in the sand. The grout ejected from the anchoring claw 2 has already traveled a distance from the pipe body 1, resulting in a wider flow range in the sand grains, increasing the grouting radius, and allowing it to meet and solidify with the grout from other surrounding boreholes, thus facilitating the formation of the isolation layer 5 and the creation of a desert water storage area.

[0091] The construction steps for forming a desert water storage area using the grouting pipe of the present invention are roughly as follows:

[0092] Step 1: Pre-select the area in the desert region where a water storage zone needs to be formed, and pre-plan the predetermined number and location of boreholes to be drilled, and prepare the grouting pipes in advance. For example, as shown in Figure 12, pre-plan the boreholes to be constructed and the curvature after laying the grouting pipes; as shown in Figure 17, the interval distance D between two adjacent boreholes 4 needs to be designed along the direction perpendicular to the borehole. The interval distance D can be calculated based on the radius r that the grouting pipe can inject, preferably D≤2r. The shape of the boreholes 4 is set as needed. For example, if the shape of the boreholes 4 is arc-shaped, and multiple interval-arranged boreholes 4 are also arranged along the arc shape, then the bottom of the desert water storage zone will be hemispherical or part of a hemisphere.

[0093] Step 2: Drill borehole 4 below the desert surface using a directional drilling rig. Borehole 4 can be drilled first, followed by the laying of the grouting pipe, or the drilling and grouting pipe laying can proceed simultaneously. The directional drilling rig is an integrated drilling and grouting machine, which is existing technology and will not be elaborated upon here. Specifically, the proximal end of pipe body 1 is connected to the directional drilling rig. The distal end of pipe body 1 first follows into borehole 4, and finally, the distal end of pipe body 1 protrudes above the desert surface, completing the grouting pipe laying. Then, the distal valve 14 is closed to prevent grout from leaking from the distal end of the inner pipe 11 during grouting.

[0094] Step 3: Use a directional drilling rig to start grouting from the near end of the inner tube 11. When the inner tube 11 is filled with grout, the grout will rush into the elastic bladder structure 3. The elastic bladder structure 3 expands to push the anchoring claw 2 outward.

[0095] Step 4: Pull the pipe body 1 against the opening direction of the anchor claw 2, causing the anchor claw 2 to insert into the surrounding sand and inject grout into the surrounding sand. Specifically, if the anchor claw 2 extends inclined towards the proximal end, pull the proximal end of the pipe body 1, causing the anchor claw 2 to move towards the proximal end and insert deeper into the surrounding sand. If the anchor claw 2 extends inclined towards the distal end, pull the distal end of the pipe body 1, causing the anchor claw 2 to move towards the distal end and insert deeper into the surrounding sand.

[0096] Step 5: Repeat steps 2 through 4 until drilling, grouting pipe laying, and grouting are completed at all preset locations.

[0097] Step 6: After the grout solidifies with the surrounding sand, the grout between the two adjacent grouting pipes converges and solidifies with the sand, forming an isolation layer 5. Above the isolation layer 5, a desert water storage area is naturally formed, which can be used to store water resources, which can be precipitation or diverted water, so that plants can be planted on the desert surface to achieve sand fixation.

[0098] After the isolation layer 5 is formed, the proximal and distal ends of the tube 1 exposed on the desert surface can be cut off as needed.

[0099] In this process, after the elastic bladder structure 3 expands and pushes the anchor claw 2 outward, even if the elastic bladder structure 3 ruptures, the grout will flow into the surrounding sand through the rupture and the outer tube opening 121, and can still form an isolation layer 5.

[0100] In one embodiment, as shown in Figures 1-6, the anchor claw 2 includes an anchor claw body 21 and a plurality of grouting nozzles 22 disposed on the edge of the anchor claw body 21. A grouting channel 23 is disposed in the anchor claw body 21, and the grouting nozzles 22 are connected to the grouting channel 23.

[0101] The pivot 15 is located at the far end of the outer tube opening 121. The far end of the anchor claw body 21 is pivotally connected to the pivot 15. The proximal end of the anchor claw body 21 has a pointed tip 212.

[0102] When the anchor claw 2 is in an outward swinging state, the proximal end of the anchor claw body 21 extends obliquely toward the proximal end of the tube body 1.

[0103] In this embodiment, the anchoring claw 2 includes an anchoring claw body 21 and multiple grouting nozzles 22. The anchoring claw body 21 is plate-shaped, wider at the distal end and narrower at the proximal end. A grouting channel 23 is disposed in the anchoring claw body 21, and the multiple grouting nozzles 22 are disposed on the edge of the anchoring claw body 21, preferably on the outer edge of the anchoring claw body 21. Each grouting nozzle 22 communicates with the grouting channel 23. The shape, size, etc., of the grouting nozzles 22 can be set as needed to meet the requirements of grout injection.

[0104] The pivot 15 is located at the distal end of the outer tube opening 121, and the distal end of the anchor claw body 21 is provided with a connecting hole, allowing the distal end of the anchor claw body 21 to be pivotally connected to the pivot 15. The proximal end of the anchor claw body 21 has a pointed tip 212 for embedding into sand grains.

[0105] When the anchor claw 2 is in an outward swinging state, the proximal end of the anchor claw body 21 extends obliquely toward the proximal end of the tube body 1.

[0106] With this configuration, when laying the grouting pipe, the far end of the pipe body 1 moves forward. At the same time, since the far end of the anchor claw body 21 is pivotally connected to the rotating shaft 15, when laying the grouting pipe, the direction of movement of the pipe body 1 is not against the near end of the anchor claw body 21, but along the near end of the anchor claw body 21. The anchor claw body 21 will not be accidentally opened and affect the laying of the grouting pipe.

[0107] In one embodiment, when the anchor claw 2 swings outward through the outer tube opening 121, the proximal end of the tube body 1 is pulled so that the tip 212 of the anchor claw body 21 is inserted into the surrounding sand grains.

[0108] In one embodiment, as shown in Figures 3, 5, and 8, the tip 212 has at least one grout nozzle 213. A plurality of grouting nozzles 22 are provided on the outer surface 211 of the anchor claw body 21 on the side of the body away from the inner tube 11.

[0109] In this embodiment, the grout sprayed from the nozzle 213 of the tip 212 is used to coagulate with the surrounding sand particles to anchor the tip 212 in the sand particles. Multiple grouting nozzles 22 are spaced apart on the outer surface 211 of the main body of the anchoring claw body 21 to inject grout into the sand particles around the pipe body 1, increasing the grouting area or area.

[0110] In one embodiment, as shown in Figures 5 and 7, the grouting nozzle 22 includes a main nozzle 221 and a plurality of secondary nozzles 222 arranged radially around the main nozzle 221. The axis of the main nozzle 221 is perpendicular to the outer surface 211 of the main body, and the angle formed between the axis of the secondary nozzles 222 and the outer surface 211 of the main body is an acute angle.

[0111] In this embodiment, each grouting nozzle 22 includes a central main nozzle 221 and a plurality of surrounding secondary nozzles 222. The plurality of secondary nozzles 222 are arranged radially around the main nozzle 221, that is, the distance between the secondary nozzles 222 and the main nozzle 221 gradually increases along the direction from the root to the end of the main nozzle 221, so as to increase the grouting area or grouting region.

[0112] In one embodiment, as shown in Figures 1-2 and 10-11, multiple sets of anchoring claw assemblies are provided along the axial direction of the pipe body 1. Each set of anchoring claw assemblies includes multiple anchoring claws 2 arranged at intervals along the circumference of the pipe body 1, which facilitates firmly anchoring the pipe body 1 in the sand.

[0113] In one embodiment, as shown in Figures 3, 5-6 and 9, the inlet 34 of the elastic bladder structure 3 is connected to the grouting channel of the inner tube 11, and a first valve 36 is provided in the inlet 34.

[0114] The outlet 35 of the elastic bladder structure 3 is connected to the grouting channel 23, and a second valve 37 is provided in the outlet 35.

[0115] The second valve 37 opens later than the first valve 36.

[0116] In this embodiment, the first valve 36 and the second valve 37 can be electric valves or pressure valves. The advantage of the second valve 37 opening after the first valve 36 is that when the elastic bladder structure 3 is filled with grout, it can fully expand, thereby opening the anchor claw 2 to the maximum angle. Then the second valve 37 opens, and the anchor claw 2 begins to inject grout.

[0117] In one embodiment, the first valve 36 opens when the inner tube 11 is filled with slurry and the pressure reaches a first pressure value.

[0118] When the elastic bladder structure 3 is filled with slurry and the pressure reaches the second pressure value, the second valve 37 opens.

[0119] The second pressure value is greater than the first pressure value.

[0120] In this embodiment, the first valve 36 and the second valve 37 are pressure valves. The opening pressure value of the first valve 36 is a first pressure value, and the opening pressure value of the second valve 37 is a second pressure value. The second pressure value is greater than the first pressure value, which can ensure that the second valve 37 opens after the first valve 36.

[0121] In one embodiment, as shown in Figures 3-6 and 9, the elastic bladder structure 3 includes an outer plate 31 connected to the anchor claw 2, an inner plate 32 connected to the inner tube 11, and an annular elastic bladder 33 connecting the outer plate 31 and the inner plate 32.

[0122] The liquid inlet 34 is located on the inner plate 32, and the liquid outlet 35 is located on the outer plate 31.

[0123] The annular elastic capsule 33 is provided with a reinforcing skeleton 39.

[0124] In this embodiment, the elastic bladder structure 3 includes an outer plate 31, an inner plate 32, and an annular elastic bladder 33. The plate 31 and the inner plate 32 can be made of plastic. The inlet 34 is located on the inner plate 32, and the outlet 35 is located on the outer plate 31. The annular elastic bladder 33 can be an annular rubber bag or rubber sleeve. A reinforcing frame 39 is provided within the annular elastic bladder 33. The reinforcing frame 39 can be a spring structure, which can both stretch and enhance the compressive strength of the annular elastic bladder 33.

[0125] During assembly, the outer plate 31 can be connected to the anchor claw 2 by means of fasteners, clips, adhesives, etc., and the inner plate 32 can be connected to the bottom of the groove 111 of the pipe wall by means of fasteners, clips, adhesives, etc.

[0126] In one embodiment, as shown in FIG9, in order to prevent the slurry entering from the inlet 34 from directly rushing towards the second valve 37 in the outlet 35, a buffer frame 38 is provided on the inner side of the outlet 35. The buffer frame 38 is connected to the outer plate 31. The slurry flows to the outlet 35 through the hollow area of ​​the buffer frame 38. The buffer frame 38 can buffer the pressure of the slurry on the second valve 37, which helps to make the second valve 37 open later than the first valve 36.

[0127] Referring to Figures 12-18, one embodiment of the present invention provides a construction method for a desert water storage area, wherein the construction method for the desert water storage area adopts the grouting pipe described in any of the preceding embodiments.

[0128] The construction method for this desert water storage area specifically includes the following steps:

[0129] S01: In the desert region, pre-select the area where a water storage area needs to be formed, pre-plan the preset number and location of the boreholes to be drilled, and prepare the grouting pipes in advance.

[0130] S02: Use a directional drilling rig to drill a hole below the desert surface and lay grouting pipes until the far end of pipe body 1 emerges above the desert surface, and then close the far end valve 14. The far end of pipe body 1 is positioned at the front along the drilling direction.

[0131] S03: Grouting begins from the proximal end of the inner tube 11 until the elastic bladder structure 3 pushes the anchoring claw 2 outward.

[0132] S04: Pull the pipe body 1 in the opposite direction of the opening of the anchor claw 2, so that the anchor claw 2 is inserted into the surrounding sand and grout is injected into the surrounding sand.

[0133] S05: Repeat steps S02-S04 until drilling, grouting pipe laying, and grouting are completed at all preset locations.

[0134] S06: After the slurry and surrounding sand particles solidify, an isolation layer 5 is formed, and a desert water storage area is formed above the isolation layer 5.

[0135] The construction steps for forming a desert water storage area using the grouting pipe of the present invention are roughly as follows:

[0136] Step 1: Pre-select the area in the desert region where a water storage zone needs to be formed, and pre-plan the predetermined number and location of boreholes to be drilled, and prepare the grouting pipes in advance. For example, as shown in Figure 12, pre-plan the boreholes to be constructed and the curvature after laying the grouting pipes; as shown in Figure 17, the interval distance D between two adjacent boreholes 4 needs to be designed along the direction perpendicular to the borehole. The interval distance D can be calculated based on the radius r that the grouting pipe can inject, preferably D≤2r. The shape of the boreholes 4 is set as needed. For example, if the shape of the boreholes 4 is arc-shaped, and multiple interval-arranged boreholes 4 are also arranged along the arc shape, then the bottom of the desert water storage zone will be hemispherical or part of a hemisphere.

[0137] Step 2: Drill borehole 4 below the desert surface using a directional drilling rig. Borehole 4 can be drilled first, followed by the laying of the grouting pipe, or the drilling and grouting pipe laying can proceed simultaneously. The directional drilling rig is an integrated drilling and grouting machine, which is existing technology and will not be elaborated upon here. Specifically, the proximal end of pipe body 1 is connected to the directional drilling rig. The distal end of pipe body 1 first follows into borehole 4, and finally, the distal end of pipe body 1 protrudes above the desert surface, completing the grouting pipe laying. Then, the distal valve 14 is closed to prevent grout from leaking from the distal end of the inner pipe 11 during grouting.

[0138] Step 3: Use a directional drilling rig to start grouting from the near end of the inner tube 11. When the inner tube 11 is filled with grout, the grout will rush into the elastic bladder structure 3. The elastic bladder structure 3 expands to push the anchoring claw 2 outward.

[0139] Step 4: Pull the pipe body 1 against the opening direction of the anchor claw 2, causing the anchor claw 2 to insert into the surrounding sand and inject grout into the surrounding sand. Specifically, if the anchor claw 2 extends inclined towards the proximal end, pull the proximal end of the pipe body 1, causing the anchor claw 2 to move towards the proximal end and insert deeper into the surrounding sand. If the anchor claw 2 extends inclined towards the distal end, pull the distal end of the pipe body 1, causing the anchor claw 2 to move towards the distal end and insert deeper into the surrounding sand.

[0140] Step 5: Repeat steps 2 through 4 until drilling, grouting pipe laying, and grouting are completed at all preset locations.

[0141] Step 6: After the grout solidifies with the surrounding sand, the grout between the two adjacent grouting pipes converges and solidifies with the sand, forming an isolation layer 5. Above the isolation layer 5, a desert water storage area is naturally formed, which can be used to store water resources, which can be precipitation or diverted water, so that plants can be planted on the desert surface to achieve sand fixation.

[0142] After the isolation layer 5 is formed, the proximal and distal ends of the tube 1 exposed on the desert surface can be cut off as needed.

[0143] In summary, the grouting pipe and desert water storage area construction method provided by the present invention can construct an isolation layer 5 to form a water storage area in any area of ​​the desert, without being limited by the desert terrain, thus expanding the scope of application.

[0144] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0145] The above are merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A grouting pipe, characterized in that, The grouting pipe is used to construct an isolation layer in desert areas to form a desert water storage area above it; The grouting pipe includes a flexible pipe body and multiple anchoring claws connected around the pipe body and having grouting channels. The pipe body includes an inner pipe and an outer pipe sleeved on the inner pipe, with an annular cavity formed between the inner pipe and the outer pipe. The pipe body includes a proximal end and a distal end arranged opposite to each other, and a distal valve is provided in the distal end of the inner pipe. The anchoring claw is installed in the annular cavity via a rotating shaft. The outer tube has an opening in the area corresponding to the anchoring claw, and the anchoring claw can swing outward through the opening of the outer tube. An elastic bladder structure capable of driving the anchor claw to swing outward is connected between the anchor claw and the inner tube. The elastic bladder structure is connected to the inner tube and the grouting channel. When the elastic bladder structure is in a contracted state, the anchoring claw is housed in the annular cavity and / or the outer tube opening by the action of the elastic bladder structure; When grout is injected into the elastic bladder structure and the structure is in an expanded state, the anchoring claws swing outward through the opening of the outer tube. The outwardly swinging anchoring claws are used to insert into the surrounding sand grains and to inject grout into the surrounding sand grains.

2. The grouting pipe according to claim 1, characterized in that, The anchoring claw includes an anchoring claw body and a plurality of grouting nozzles disposed on the edge of the anchoring claw body. The grouting channel is disposed in the anchoring claw body, and the grouting nozzles are connected to the grouting channel. The pivot is located at the distal end of the outer tube opening, the distal end of the anchoring claw body is pivotally connected to the pivot, and the proximal end of the anchoring claw body has a pointed tip. When the anchoring claw is in an outward swinging state, the proximal end of the anchoring claw body extends obliquely toward the proximal end of the tube body.

3. The grouting pipe according to claim 2, characterized in that, After the anchoring claw swings outward through the opening of the outer tube, the proximal end of the tube is pulled so that the tip of the anchoring claw body is inserted into the surrounding sand grains.

4. The grouting pipe according to claim 2, characterized in that, The tip has at least one spray nozzle; Multiple grouting nozzles are disposed on the outer surface of the main body of the anchoring claw body on the side away from the inner tube.

5. The grouting pipe according to claim 4, characterized in that, The grouting nozzle includes a main nozzle and a plurality of auxiliary nozzles arranged radially around the main nozzle. The axis of the main nozzle is perpendicular to the outer surface of the main body, and the angle formed between the axis of the auxiliary nozzle and the outer surface of the main body is an acute angle.

6. The grouting pipe according to claim 1, characterized in that, Multiple sets of anchor claw assemblies are provided along the axial direction of the tube body, and each set of anchor claw assemblies includes multiple anchor claws arranged at intervals along the circumference of the tube body.

7. The grouting pipe according to claim 1, characterized in that, The liquid inlet of the elastic bladder structure is connected to the grouting channel of the inner tube, and a first valve is provided in the liquid inlet; The outlet of the elastic bladder structure is connected to the grouting channel, and a second valve is provided in the outlet; The second valve opens after the first valve opens.

8. The grouting pipe according to claim 7, characterized in that, When the inner tube is filled with slurry and the pressure reaches the first pressure value, the first valve opens. When the elastic bladder structure is filled with slurry and the pressure reaches the second pressure value, the second valve opens; The second pressure value is greater than the first pressure value.

9. The grouting pipe according to claim 7, characterized in that, The elastic bladder structure includes an outer plate connected to the anchor claw, an inner plate connected to the inner tube, and an annular elastic bladder connecting the outer plate and the inner plate. The liquid inlet is located on the inner plate, and the liquid outlet is located on the outer plate; The annular elastic capsule is provided with a reinforcing skeleton.

10. A construction method for a desert water storage area, characterized in that, The grouting pipe according to any one of claims 1-9 is used; The construction method for the desert water storage area includes the following steps: S01: In the desert region, a water storage area is pre-selected, and the number and location of boreholes to be drilled are pre-planned, and the grouting pipes are prepared in advance; S02: Using a directional drilling rig, drill a hole below the desert surface and lay the grouting pipe until the distal end of the pipe protrudes above the desert surface, and then close the distal valve; wherein, along the drilling direction of the hole, the distal end of the pipe is in front; S03: Grouting begins from the proximal end of the inner tube until the elastic bladder structure pushes the anchoring claw outward; S04: Pull the tube body against the opening direction of the anchor claw, so that the anchor claw inserts into the surrounding sand and injects grout into the surrounding sand; S05: Repeat steps S02-S04 until drilling, laying of grouting pipes, and grouting are completed at all the preset locations; S06: After the slurry and surrounding sand particles solidify, an isolation layer is formed, and a desert water storage area is formed above the isolation layer.

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