Stratum grid type grouting method and device
By forming a grid-like marking on the surface of the stratum and using a grouting device to cut the stratum to form a grid structure, the problem of uncontrollable grout diffusion range was solved, and the bearing capacity of the stratum and the grouting effect were improved.
Patent Information
- Application Number
- CN202511695807.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-01-20
AI Technical Summary
In existing technologies, the diffusion range of grout during the grouting process is uncontrollable, which affects the reinforcement or seepage prevention effect and leads to a reduction in the bearing capacity of the stratum.
The stratum grid grouting method is adopted. A grid-like marking is formed on the stratum surface, and guide trenches are excavated along the markings and point grouting is carried out. The vertical and lateral water jet pipes in the grouting device are used to cut the stratum to form a grid structure, thereby controlling the grout diffusion range.
This achieved uniformity and control of grout diffusion, improving the formation's bearing capacity and grouting effect.
Smart Images
Figure CN121363210A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of grouting reinforcement, in particular to a stratum grid pattern grouting method and device. BACKGROUND
[0002] Stratum grouting reinforcement refers to injecting some curable slurry into cracks or pores of stratum to improve its physical and mechanical properties; the purpose of grouting is to prevent seepage, block leakage, reinforce and correct building deflection; grouting process is to prepare slurry from specific materials, inject it into stratum or pores by grouting pump, and diffuse, gel or solidify to achieve the purpose of reinforcing stratum or preventing seepage; as one of the most commonly used methods in stratum treatment, this process is widely used in stratum reinforcement and seepage prevention in construction, municipal, water conservancy and other engineering due to its simple equipment, convenient construction and good economy; during grouting, slurry will diffuse along stratum pores, and the diffusion of slurry will be affected by stratum uniformity and pore distribution, while stratum pores cannot be accurately detected, thus leading to uncontrollable slurry diffusion range, thereby affecting the reinforcement or seepage prevention effect, and even causing local grouting failure and reducing the bearing capacity of stratum. SUMMARY
[0003] The present application aims at the deficiencies of the prior art, and provides a stratum grid pattern grouting method and device.
[0004] To solve the above problems, the technical solution adopted by the present application is as follows:
[0005] A stratum grid pattern grouting method, comprising the following steps:
[0006] S1, determining the diffusion radius of slurry in stratum based on stratum geological conditions and the slurry material to be injected;
[0007] S2, forming a grid pattern marking line on the surface of stratum according to 1.6-1.8 times the length of the diffusion radius of slurry;
[0008] S3, grouting along the grid pattern marking line on stratum to form a closed grid pattern slurry diffusion boundary;
[0009] S4, performing point grouting within each grid pattern slurry diffusion boundary to achieve the preset requirements.
[0010] Preferably, a guide trench is excavated on stratum along the grid pattern marking line, and then stratum is grouted along the guide trench to form a grid pattern slurry diffusion boundary.
[0011] Preferably, when performing point grouting within each grid pattern slurry diffusion boundary, the grouting point is at the center of the grid.
[0012] Preferably, the soil is cut along the grid lines on the stratum to form cutting grooves, and grouting is performed in the cutting grooves to form a grout diffusion boundary in the form of a grid.
[0013] The grouting device comprises a sleeve, a grouting hole is formed in the lower end of the sleeve, a grouting groove is formed in the side wall of the sleeve, a vertical water jet pipe or a lateral water jet pipe is inserted into the sleeve, a vertical jet hole is formed in the bottom of the vertical water jet pipe, the vertical jet hole corresponds to the position of the grouting hole, a lateral jet hole is formed in the side wall of the lateral water jet pipe, and the lateral jet hole corresponds to the position of the grouting groove.
[0014] Preferably, a sleeve ring is fixedly arranged in the lower part of the sleeve, and the vertical water jet pipe and the lateral water jet pipe are sleeved in the sleeve ring.
[0015] Preferably, a guide sleeve is fixedly connected to the lower end of the sleeve, the lower part of the guide sleeve is in a conical structure, the grouting hole is formed in the lower end of the guide sleeve, and the sleeve ring is fixedly arranged in the guide sleeve.
[0016] Preferably, air bags are sleeved on the upper parts of the vertical water jet pipe and the lateral water jet pipe, and the air bags are located in the upper part of the sleeve.
[0017] Preferably, a grouting discharge groove is formed in the outer wall of the sleeve for discharging grout.
[0018] Preferably, the sleeve comprises two sleeve pipes arranged side by side, the two sleeve pipes are fixedly connected through a connecting plate, and the grouting discharge groove is located between the two sleeve pipes.
[0019] The above technical scheme has the following beneficial effects:
[0020] 1. In the present application, the stratum is divided into a grid structure, and grooves are formed along the grid lines, and grout is injected into the cutting grooves at the same time, so that a closed boundary in the form of a grid is formed, and then grouting is performed in each grid, when the injected grout diffuses along the stratum pores, it can block the grout when encountering the grid boundary, preventing the grout from continuing to diffuse, thereby effectively controlling the diffusion range of the grout, making the stratum grouting more uniform, and improving the bearing capacity of the stratum.
[0021] 2. In the present application, high-pressure grout is injected into the vertical water jet pipe, and the grout can be sprayed out of the vertical jet hole and the lateral jet hole, when the grout is sprayed out of the vertical jet hole, the sleeve is inserted into the stratum downward, after being inserted to a certain depth, the sleeve is moved horizontally along the grid boundary, the grout sprayed out of the lateral jet hole can cut the stratum, facilitating the movement of the sleeve, until the stratum is formed into a grid structure intersecting each other, and the sprayed grout can remain in the cutting groove to block the diffusion of the grout. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a grid reticle schematic diagram of the present application;
[0023] Figure 2 is a three-dimensional schematic diagram of the grouting device of the present application;
[0024] Figure 3 is an exploded view of the grouting device of the present application;
[0025] Figure 4 is a three-dimensional schematic diagram of the sleeve of the present application;
[0026] Figure 5 is a three-dimensional schematic diagram of the guide sleeve of the present application;
[0027] Figure 6 is another three-dimensional schematic diagram of the guide sleeve of the present application;
[0028] Figure 7 is a three-dimensional schematic diagram of the vertical water jet pipe of the present application;
[0029] Figure 8 is a three-dimensional schematic diagram of the lateral water jet pipe of the present application.
[0030] In the figure: 1 is a sleeve, 2 is a grout outlet hole, 3 is a grout outlet groove, 4 is a vertical water jet pipe, 5 is a lateral water jet pipe, 6 is a vertical jet hole, 7 is a lateral jet hole, 8 is a sleeve, 9 is a guide sleeve, 10 is a clamping part, 11 is an air bag, 12 is a grout discharge groove, 13 is a sleeve, 14 is a connecting plate. DETAILED DESCRIPTION
[0031] The embodiments of the present application will be further described below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.
[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0034] As shown in Figure 2 , Figure 3 , Figure 7 and Figure 8 , a grouting device comprises a sleeve 1, the lower end of the sleeve 1 is provided with a grouting hole 2, the upper end of the sleeve 1 is an open end, the inside of the sleeve 1 is provided with a hollow chamber, one of the side walls of the sleeve 1 is provided with a grouting groove 3 in the vertical direction, the grouting groove 3 extends from the upper end to the lower end of the sleeve 1, a vertical water jet pipe 4 or a lateral water jet pipe 5 is inserted into the hollow chamber of the sleeve 1, the vertical water jet pipe 4 and the lateral water jet pipe 5 are detachably fixedly connected with the sleeve 1, the vertical water jet pipe 4 and the lateral water jet pipe 5 can be replaced in the sleeve 1, when the sleeve 1 needs to be inserted downward, the vertical water jet pipe 4 is inserted into the sleeve 1; when the sleeve 1 needs to be cut horizontally in the soil, the vertical water jet pipe 4 is removed from the sleeve 1 and replaced with the lateral water jet pipe 5; the vertical water jet pipe 4 and the lateral water jet pipe 5 are both circular pipe structures, the upper ends of the vertical water jet pipe 4 and the lateral water jet pipe 5 are open ends and are provided with internal threads, which can be threadedly connected with a high-pressure water pump pipe or a grouting pump pipe, the lower ends of the vertical water jet pipe 4 and the lateral water jet pipe 5 are conical structures, a vertical jet hole 6 is formed at the bottom tip of the vertical water jet pipe 4, when the vertical water jet pipe 4 is inserted into the sleeve 1, the vertical jet hole 6 corresponds to the position of the grouting hole 2; a lateral jet hole 7 is formed in the side wall of the lateral water jet pipe 5, when the lateral water jet pipe 5 is inserted into the sleeve 1, the lateral jet hole 7 corresponds to the position of the grouting groove 3.
[0035] In the present application, when the stratum is meshed and cut, the vertical water jet pipe 4 is first inserted into the sleeve 1 and fixedly connected with the sleeve 1, the upper end of the vertical water jet pipe 4 can be connected with the pump pipe of the high-pressure water pump, the high-pressure pump injects high-pressure water into the vertical water jet pipe 4, the high-pressure water can be sprayed from the vertical jet hole 6, when the high-pressure water is sprayed from the vertical jet hole 6 at the bottom of the vertical water jet pipe 4, it can continue to be sprayed from the slurry outlet hole 2 at the lower end of the sleeve 1, the sprayed high-pressure water is directed to the stratum below, so that the stratum is softened, and the sleeve 1 is easily inserted into the stratum; when the sleeve 1 is inserted to a certain depth, the vertical water jet pipe 4 is taken out of the sleeve 1, then the lateral water jet pipe 5 is inserted into the sleeve 1 and fixedly connected with the sleeve 1, the upper end of the lateral water jet pipe 5 is connected with the pump pipe of the high-pressure water pump, the high-pressure water pump delivers high-pressure water into the lateral water jet pipe 5 and sprays it from the lateral jet hole 7, since the lateral jet hole 7 corresponds to the position of the slurry outlet groove 3, the high-pressure water sprayed from the lateral jet hole 7 can be sprayed to the stratum beside the sleeve 1 through the slurry outlet groove 3, so that the stratum is softened, then the sleeve 1 is horizontally moved to the direction of the softened stratum to cut the soil body; as the sleeve 1 continuously moves along the ground mark, the surface of the stratum forms a mesh-shaped cutting groove as shown in Figure 1 Subsequently, the pump pipe of the high-pressure water pump is disassembled and replaced by the pump pipe of the grouting pump, the slurry is injected into the lateral water jet pipe 5, the slurry is sprayed from the lateral jet hole 7 and then enters the cutting groove and fills the cutting groove, as the slurry hardens, the stratum forms a mesh-shaped closed boundary.
[0036] Further, the lower part of the sleeve 1 is fixedly provided with a sleeve hoop 8, the sleeve hoop 8 is fixedly connected with the sleeve 1 by welding, the sleeve hoop 8 is provided with an internal thread, the vertical water jet pipe 4 and the lateral water jet pipe 5 can be sleeved in the sleeve hoop 8, the side wall of the lower part of the vertical water jet pipe 4 and the lateral water jet pipe 5 is provided with an external thread, the vertical water jet pipe 4 and the lateral water jet pipe 5 can be threadedly connected with the sleeve hoop 8; in the present embodiment, when the sleeve 1 needs to be inserted into the ground, the vertical water jet pipe 4 is inserted into the sleeve 1 and threadedly connected with the sleeve hoop 8, so that the vertical water jet pipe 4 is fixedly arranged in the sleeve 1; when the sleeve 1 needs to be horizontally moved in the stratum to cut, the vertical water jet pipe 4 is unscrewed from the sleeve hoop 8, and the lateral water jet pipe 5 is inserted into the sleeve 1 and threadedly connected with the sleeve hoop 8, so that the soil body can be horizontally cut.
[0037] It should be noted that the diameters of the external thread parts at the lower parts of the vertical water jet pipe 4 and the lateral water jet pipe 5 are matched with the diameters of the internal threads at the upper ends, the external threads on the side walls of the lower parts of the vertical water jet pipe 4 and the lateral water jet pipe 5 can be threadedly connected with the internal threads at the upper ends of the vertical water jet pipe 4 and the lateral water jet pipe 5, so that the vertical water jet pipe 4 or the lateral water jet pipe 5 can be combined together, the lengths of the vertical water jet pipe 4 and the lateral water jet pipe 5 are prolonged, and the sleeve 1 is correspondingly spliced, so as to adapt to the cutting of the soil body at different depths.
[0038] AsFigure 5 and Figure 6 As shown in the figure, the lower end of the sleeve 1 is fixedly connected with a guide sleeve 9, the lower part of the guide sleeve 9 is a tapered structure, the slurry outlet hole 2 is arranged at the tip of the lower end of the guide sleeve 9, and the sleeve clamp 8 is fixedly arranged in the guide sleeve 9. In this embodiment, when the vertical water jet pipe 4 is inserted into the guide sleeve 9 and threadedly connected with the sleeve clamp 8, the vertical jet hole 6 corresponds to the slurry outlet hole 2 at the lower end of the guide sleeve 9, and the tapered structure of the lower part of the guide sleeve 9 facilitates insertion into the stratum during the downward insertion of the sleeve 1.
[0039] As shown in the figure, the guide sleeve 9 is provided with a through slit 15 on one side, the through slit 15 is in communication with the slurry groove 3, when the lateral water jet pipe 5 is inserted into the guide sleeve 9 and threadedly fixedly connected with the sleeve clamp 8, the lateral jet hole 7 at the lower part of the lateral water jet pipe 5 corresponds to the through slit 15 on the guide sleeve 9, and the liquid sprayed by the lateral jet hole 7 can be delivered to the outside of the guide sleeve 9 through the through slit 15 to cut the soil body. Figure 5 and Figure 6 As shown in the figure, the guide sleeve 9 is provided with a through slit 15 on one side, the through slit 15 is in communication with the slurry groove 3, when the lateral water jet pipe 5 is inserted into the guide sleeve 9 and threadedly fixedly connected with the sleeve clamp 8, the lateral jet hole 7 at the lower part of the lateral water jet pipe 5 corresponds to the through slit 15 on the guide sleeve 9, and the liquid sprayed by the lateral jet hole 7 can be delivered to the outside of the guide sleeve 9 through the through slit 15 to cut the soil body.
[0040] As shown in the figure, the lower part of the sleeve 1 is provided with a clamping part 10, the outer dimension of the clamping part 10 is smaller than the outer dimension of the sleeve 1, the inner dimension of the guide sleeve 9 is larger than the outer dimension of the clamping part 10, and the guide sleeve 9 is inserted on the clamping part 10, so that the outer side wall of the guide sleeve 9 is located in the same plane as the outer side wall of the sleeve 1. Figure 4 It should be noted that the side wall of the guide sleeve 9 is provided with a first bolt hole 16, the side wall of the clamping part 10 is provided with a second bolt hole 17, the first bolt hole 16 and the second bolt hole 17 are coincided when the guide sleeve 9 is inserted on the clamping part 10, and the insertion of the bolt into the first bolt hole 16 and the second bolt hole 17 can fixedly connect the guide sleeve 9 and the clamping part 10.
[0041] Further, the upper part of the sleeve 1 is provided with a splicing part 18, the splicing part 18 is located in the inside of the sleeve 1, the dimension of the splicing part 18 is matched with the dimension of the clamping part 10, and the splicing part 18 is provided with a third bolt hole 19, when the length of the sleeve 1 needs to be extended, the clamping part 10 at the lower part of the sleeve 1 is inserted into the splicing part 18 at the upper part of another sleeve 1, the second bolt hole 17 on the sleeve 1 is coincided with the third bolt hole 19 on another sleeve 1, the bolt is inserted into the second bolt hole 17 and the third bolt hole 19, and the two sleeves 1 are fixedly connected, so as to extend the length of the sleeve 1 to adapt to the stratum of different depths.
[0042]
[0043] Further, the upper part of the vertical water jet pipe 4 and the lateral water jet pipe 5 is sleeved with an air bag 11, which is located in the upper part of the sleeve 1. The air bag 11 is a inflatable air bag. When the vertical water jet pipe 4 or the lateral water jet pipe 5 is inserted into the sleeve 1 and fixedly connected with the sleeve 1, the air bag 11 is sleeved on the upper part of the vertical water jet pipe 4 or the lateral water jet pipe 5 located in the sleeve 1. The air bag 11 is clamped in the internal cavity of the sleeve 1. The air bag 11 is inflated to expand. The air bag 11 can fill the gap between the vertical water jet pipe 4 or the lateral water jet pipe 5 and the side wall of the sleeve 1, preventing the vertical water jet pipe 4 or the lateral water jet pipe 5 from shaking in the sleeve 1.
[0044] Further, the outer wall of the sleeve 1 is provided with a slurry discharge groove 12, which penetrates the upper and lower ends of the sleeve 1. In this embodiment, the vertical water jet pipe 4 or the lateral water jet pipe 5 is fixed in the sleeve 1. When high-pressure water is filled into the vertical water jet pipe 4 or the lateral water jet pipe 5 to cut the soil, the slurry generated can be discharged to the outside of the cutting groove through the slurry discharge groove 12.
[0045] Further, the sleeve 1 comprises two sleeve pipes 13 arranged side by side. The sleeve pipe 13 is a square steel pipe with a through hole at the upper and lower ends. The two sleeve pipes 13 are fixedly connected by a connecting plate 14. The connecting plate 14 is provided with two connecting plates 14 arranged in parallel. The slurry discharge groove 12 is located between the two sleeve pipes 13. One vertical water jet pipe 4 or one lateral water jet pipe 5 is inserted into each sleeve pipe 13. The guide sleeve 9 is located at the lower end of the two sleeve pipes 13. The bottom of the guide sleeve 9 is provided with two slurry discharge holes 2. The two slurry discharge holes 2 are located below the vertical water jet pipe 4 in the two sleeve pipes 13 and correspond to the vertical jet hole 6. The slurry discharge groove 3 is provided on the side wall of the sleeve pipe 13. The slurry discharge grooves 3 on the two sleeve pipes 13 are located on the side walls of the two sleeve pipes 13 away from each other. When the lateral water jet pipe 6 is inserted into the sleeve pipe 13 and fixedly arranged in the sleeve pipe 13, the lateral jet hole 7 on the side wall of the lateral water jet pipe 6 corresponds to the position of the slurry discharge groove 3, which can cut the soil horizontally.
[0046] In another embodiment, the sleeve pipe 13 is provided with two sleeve pipes 13. One vertical water jet pipe 4 or one lateral water jet pipe 5 can be arranged in each sleeve pipe 13. When the vertical water jet pipe 4 is arranged in the sleeve pipe 13, the vertical water jet pipe 4 is connected with the high-pressure water pump pipe, which can cut the soil vertically downward to make the sleeve pipe 13 inserted into the ground. When the lateral water jet pipe 5 is arranged in the sleeve pipe 13, one of the lateral water jet pipes 5 is connected with the high-pressure water pump pipe, and the other lateral water jet pipe 5 is connected with the grouting pump pipe. The lateral water jet pipe 5 connected with the high-pressure water pump pipe cuts the soil horizontally to form a cutting groove in the stratum. The lateral water jet pipe 5 connected with the grouting pump pipe outputs grouting liquid, which can fill the cutting groove to form a closed grid-shaped boundary.
[0047] A stratum grid grouting method, comprising the following steps:
[0048] S1, based on the stratum geological conditions and the required injected slurry material, determining the diffusion radius of the slurry in the stratum, and the radius of the slurry diffusion in the stratum can be selected according to the requirements in DB11-1444-2017 Urban Rail Transit Tunnel Engineering Grouting Technical Specification, which discloses the range of slurry diffusion radius values under different texture conditions, and the corresponding diffusion radius can be selected according to the actual geological conditions;
[0049] S2, forming a grid pattern marking line on the stratum surface according to the length of 1.6-1.8 times the diffusion radius of the slurry, as shown in Figure 1
[0050] S3, grouting along the grid pattern marking line on the stratum, which can be grouted along the marking line by conventional grouting or rotary jet grouting, so that the slurry gradually forms a closed grid pattern slurry diffusion boundary;
[0051] S4, point grouting in each grid pattern slurry diffusion boundary, and the grouting standard can be grouted according to the requirements in YS / T5211-2018 Grouting Technical Specification to achieve the preset requirements.
[0052] Among them, the guide trench is excavated along the grid pattern marking line on the stratum, which can be used for positioning, and the guide trench can be excavated along the marking line by the way of excavator over man-made excavation, which is convenient for the insertion of the grouting device, and then the soil is cut along the guide trench for grouting to form a grid-shaped closed grouting boundary.
[0053] Among them, when point grouting in each grid pattern slurry diffusion boundary, grouting is carried out at the grid center as the grouting point, so that the slurry can be uniformly diffused in the closed grid boundary.
[0054] In another embodiment, in the above step S3, the soil is cut along the grid pattern marking line on the stratum to form a cutting trench, and grouting is carried out in the cutting trench to form a grid pattern slurry diffusion boundary, and the soil can be cut by the above grouting device when cutting the soil; specifically, the grouting device is inserted into the ground along the grid pattern marking line, and the stratum is cut along the marking line to form a cutting trench, and then the grouting device is used to inject slurry into the cutting trench, and the grid pattern closed slurry boundary can be formed as the slurry solidifies and hardens;
[0055] In the present application, the soil is first cut by passing high-pressure water into the grouting device, forming a cutting trench as shown in Figure 1 The grid-shaped boundary is shown, then the high-pressure water is replaced by the grouting liquid, the grouting liquid is input into the grouting device and sprayed out of the grouting device, the grouting liquid spreads along the grid-shaped cutting groove after being sprayed out, until the cutting groove is filled, with the solidification and hardening of the grouting liquid, the grid-shaped grouting liquid boundary is formed; finally, the point grouting is carried out at the center of each grid, the grouting liquid spreads uniformly in each grid along the stratum pore, when the grouting liquid spreads to the grid boundary, the solidified and hardened grouting liquid can block the spreading grouting liquid, preventing the grouting liquid from continuing to spread, so as to effectively control the spreading range of the grouting liquid, improve the uniformity of the grouting, and thus improve the grouting effect.
[0056] In another embodiment, according to the geological conditions of the site to be treated, the medium-coarse sand, the treatment depth is 4m, and the type of grouting liquid injected is selected as cement-silicate double-liquid slurry; it can be concluded that the diffusion radius of the grouting liquid is 0.4m, therefore, 0.7m length is taken as the grid boundary division scheme of the site to be treated, the grid boundary lines intersect with each other to cut the site to be treated into a grid-shaped structure with a length of 0.7m; the grid boundary lines are measured and placed on site, and the guide trench is excavated according to the grid boundary lines.
[0057] The guide sleeve 9 is fixedly assembled with the sleeve 1, the vertical water jet pipe 4 is inserted into the sleeve 1 and is threadedly fixedly connected with the sleeve hoop 8, the air bag 11 is sleeved on the upper end of the vertical water jet pipe 4 and is inflated, the vertical water jet pipe 4 is fixed in the sleeve 1, the high-pressure water pump pipe is connected with the vertical water jet pipe 4, the sleeve 1 is vertically placed in the end of one of the guide grooves which are excavated, after the high-pressure water pump is started, the high-pressure water is sprayed from the vertical jet orifice 6 at the lower end of the vertical water jet pipe 4 and is sprayed from the slurry outlet orifice 2 at the lower end of the guide sleeve 9, the soil is vertically cut downwards, the sleeve 1 can be inserted into the ground to a depth of 4 m, the tapered structure at the lower end of the guide sleeve 9 facilitates the insertion of the sleeve 1; after being inserted to the specified depth, the high-pressure water pump is turned off, the pump pipe is separated from the vertical water jet pipe 4, the gas in the air bag 11 is discharged, the vertical water jet pipe 4 is separated from the sleeve hoop 8 and is pulled out from the sleeve 1, then the lateral water jet pipe 5 is replaced, the installation process of the lateral water jet pipe 5 is consistent with that of the vertical water jet pipe 4, after the installation is completed, the lateral jet orifice 7 of the lateral water jet pipe 5 corresponds to the position of the slurry outlet groove 3; since the sleeve 1 comprises two sleeve pipes 13, two lateral water jet pipes 5 are arranged in the two sleeve pipes 13, one of the lateral water jet pipes 5 is connected with the high-pressure water pump pipe, the other lateral water jet pipe 5 is connected with the grouting pump pipe, after the high-pressure water pump and the grouting pump are simultaneously started, the lateral water jet pipe 5 connected with the high-pressure water pump pipe cuts the soil horizontally, during the cutting, the lateral water jet pipe 5 moves along the marking line at a speed of 0.5 m / min, the lateral water jet pipe 5 connected with the grouting pump sprays the grouting liquid, the grouting liquid fills the cutting groove which is cut, until the marking line is moved to the tail portion, at the same time, the high-pressure water pump and the grouting pump are turned off, then the cutting and grouting of one marking line are completed, the above operation is repeatedly performed until the grid-shaped cutting grooves are formed and are filled with the grouting liquid, after the grouting liquid is hardened, the point-like grouting is performed with the grid center as the grouting point, after the grouting of all the grouting points is completed, the entire stratum can be reinforced or water-stopping treatment can be performed.
[0058] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features thereof can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A method of grid grouting of a subterranean formation, characterized by, The method comprises the following steps: S1, determining the diffusion radius of the slurry in the stratum based on the geological conditions of the stratum and the slurry material to be injected; S2, forming a net-shaped mark on the surface of the stratum according to the length of 1.6-1.8 times the diffusion radius of the slurry; S3, injecting the slurry along the net-shaped mark on the stratum to form a closed net-shaped slurry diffusion boundary; S4, performing point injection within each net-shaped slurry diffusion boundary to achieve the preset requirements.
2. A grid grouting method according to claim 1, wherein Excavating a guide trench along the net-shaped mark on the stratum, and then injecting the slurry along the guide trench to form a net-shaped slurry diffusion boundary.
3. A grid grouting method according to claim 1, wherein When performing point injection within each net-shaped slurry diffusion boundary, injecting the slurry at the center of the grid as the injection point.
4. A grid grouting method according to claim 1, wherein Cutting the soil along the net-shaped mark on the stratum to form a cutting trench, and then injecting the slurry in the cutting trench to form a net-shaped slurry diffusion boundary.
5. A grouting device, characterized in that The sleeve (1) is provided with a slurry outlet hole (2) at the lower end, a slurry outlet groove (3) on the side wall, a vertical water jet pipe (4) or a lateral water jet pipe (5) inserted in the sleeve (1), a vertical jet hole (6) at the bottom of the vertical water jet pipe (4) corresponding to the position of the slurry outlet hole (2), and a lateral jet hole (7) on the side wall of the lateral water jet pipe (5) corresponding to the position of the slurry outlet groove (3).
6. A grouting device according to claim 5, characterised in that A sleeve clamp (8) is fixedly arranged at the lower part of the sleeve (1), and the vertical water jet pipe (4) and the lateral water jet pipe (5) are sleeved in the sleeve clamp (8).
7. A grouting device according to claim 6, characterised in that A guide sleeve (9) is fixedly connected to the lower end of the sleeve (1), the lower part of the guide sleeve (9) is in a conical structure, the slurry outlet hole (2) is arranged at the lower end of the guide sleeve (9), and the sleeve clamp (8) is fixedly arranged in the guide sleeve (9).
8. A grouting device according to claim 7, characterized in that The upper parts of the vertical water jet pipe (4) and the lateral water jet pipe (5) are sleeved with an air bag (11), and the air bag (11) is located at the upper part of the sleeve (1).
9. A grouting device according to claim 5, characterized in that A slurry discharge groove (12) is arranged on the outer wall of the sleeve (1) for discharging the slurry.
10. A grouting device according to claim 9, characterized in that The sleeve (1) comprises two sleeve pipes (13) arranged side by side, the two sleeve pipes (13) are fixedly connected by a connecting plate (14), and the slurry discharge groove (12) is located between the two sleeve pipes (13).