CN111549757B - Grouting reinforcement method suitable for soft filler karst cave - Google Patents
Grouting reinforcement method suitable for soft filler karst cave Download PDFInfo
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- CN111549757B CN111549757B CN202010408836.0A CN202010408836A CN111549757B CN 111549757 B CN111549757 B CN 111549757B CN 202010408836 A CN202010408836 A CN 202010408836A CN 111549757 B CN111549757 B CN 111549757B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Abstract
The invention provides a grouting reinforcement method suitable for a soft filler karst cave. Comprises a grouting pipe, a grouting barrel and a grouting valve; a plurality of partition plates are arranged inside the grouting barrel along the height direction of the grouting barrel, a grout containing cavity is formed by two adjacent partition plates and the side wall of the grouting barrel, a plurality of telescopic grouting valves are connected to the side wall of the grouting barrel in a sliding mode, and each grouting valve is located between two layers of partition plates; the end of the grouting pipe provided with the grout conveying hole penetrates through the partition plate of the grouting barrel to be connected with the grouting barrel in a sliding mode along the height direction, and piston rings are arranged on two sides of the grout conveying hole along the height direction of the grouting pipe. According to the invention, the multiple layers of slurry containing cavities are arranged in the grouting barrel, and the grouting valve is arranged on the side wall of each slurry containing cavity, so that the grouting barrel can be suitable for grouting and reinforcing strata at different depths only by lifting the grouting pipe, the workload of workers for lifting the whole grouting equipment can be reduced, and the grouting work efficiency is improved.
Description
Technical Field
The invention relates to the technical field of stratum grouting reinforcement, in particular to a grouting reinforcement method suitable for a karst cave of a weak filler.
Background
The karst area is a geological disaster area, a large number of karst cave areas exist underground, and for projects such as pile foundation, foundation pit and underground tunnel excavation, the karst caves need to be processed firstly to ensure the safety of construction and use and avoid safety accidents such as hole collapse, water leakage and large-area collapse at the periphery caused by the karst caves in the construction and use processes. According to geological drilling data, different treatment methods are respectively adopted according to the concrete conditions of various types of soil dissolving holes, on one hand, the expected treatment effect can be ensured, on the other hand, the cost can be effectively controlled, and the investment of engineering construction funds is reduced.
In actual construction, a treatment method of floral tube grouting is generally adopted for a half-filled or full-filled soil dissolving cave with the height of more than 1.5m, namely, a drilling machine is adopted to form grouting holes at a designed position, the diameter of each formed hole is 91mm, and the depth of each formed hole is equal to the bottom of a bottom plate of the exposed soil dissolving cave within the treatment depth range. After pore forming, a hole protecting pipe with the diameter of 60-80mm is preferably arranged, 2 holes with the diameter of 2-3 cm are split at the position of the karst cave at intervals of 20cm, the holes are diluted and then concentrated, concentrated slurry is taken as the main material, and the grouting pressure is 0.5-2.0 MPa until the karst cave is filled. If the cement slurry is not filled in a certain amount, double core pipes and water glass are adopted for double-liquid grouting plugging to meet the grouting pressure requirement. However, in the grouting process, due to the fact that the fillers block the grout and can only permeate grouting, the grouting permeation range is generally within one meter, and therefore drilling holes and grouting holes need to be encrypted to achieve a good grouting effect, grouting equipment needs to be lifted for multiple times aiming at grouting operations of strata with different depths, a large amount of time needs to be consumed, and meanwhile, the economic cost and the labor amount of construction are increased.
Chinese patent 2013100827363 discloses an adjustable plug-in grouting device, which comprises a grouting pipe, a conical head and a joint, wherein the lower part of the grouting pipe is provided with a plurality of layers of grouting holes, each layer of grouting holes are uniformly distributed, and the layers are staggered; the grouting holes are threaded holes, and grout outlet heads or plugs with different inner diameters can be installed. When the device is used for grouting, all grouting heads perform grouting simultaneously, grouting pressure is not convenient to control, and the grouting range is limited. In view of the above, there is a need for a grouting reinforcement method suitable for soft filler karst caves to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a grouting reinforcement method suitable for a soft filler karst cave, and aims to solve the problem that the position of grouting equipment needs to be lifted and adjusted for multiple times when bottom layers with different depths are reinforced.
In order to achieve the purpose, the method comprises the following specific steps:
s1: appointing a grouting position according to geological design, measuring and positioning a grouting hole, and drilling the grouting hole by using a drill carriage;
s2: the grouting reinforcement equipment suitable for the soft filler karst cave is adopted and is characterized by comprising a grouting pipe, a grouting barrel and a grouting valve; a plurality of partition plates are arranged inside the grouting barrel along the height direction of the grouting barrel, a grout containing cavity is formed by two adjacent partition plates and the side wall of the grouting barrel, a plurality of telescopic grouting valves are connected to the side wall of the grouting barrel in a sliding mode, and each grouting valve is located between two layers of partition plates; one end of the grouting pipe, which is provided with a grout conveying hole, penetrates through a partition plate of the grouting barrel to be connected with the grouting barrel in a sliding mode along the height direction, and piston rings are arranged on two sides of the grout conveying hole along the height direction of the grouting pipe; the grouting barrel is provided with a grout conveying barrel penetrating through a partition plate in the height direction, the grouting pipe is nested in the grout conveying barrel and is connected with the grout conveying barrel in a sliding mode in the height direction, the side wall of the grout conveying barrel is provided with a plurality of injection holes for conveying grout into each grout containing cavity in the grouting barrel, the grouting valve comprises an outer sleeve and an inner drill core which are sequentially nested and are connected in a sliding mode in the axial direction of the grouting valve, the outer wall of the first end of the outer sleeve is provided with an outer sleeve grout circulation hole I, the inner wall of the second end of the outer sleeve is provided with an outer sleeve grout circulation hole II, the outer sleeve grout circulation hole I and the outer sleeve grout circulation hole II are communicated through a grout circulation channel I in the cylinder wall of the outer sleeve, the first end of the outer sleeve is provided with a hole sealing sliding plate, the hole sealing sliding plate is connected with the outer wall of the outer sleeve in a sliding mode, and one end of the hole sealing sliding plate is connected with the first end of the outer sleeve through a spring, the side wall of the first end of the inner drill core is provided with an inner drill core slurry circulation hole, the second end of the inner drill core is provided with a grouting diffusion hole, and the inner drill core slurry circulation hole and the grouting diffusion hole are communicated through an inner slurry circulation cavity of the inner drill core; assembling the grouting pipe and the grouting barrel to a required height, putting the assembled grouting equipment into the bottom of the grouting hole punched in the S1, wherein the upper parts of the grouting pipe and the grouting barrel are higher than the ground surface;
s3: grouting, namely extending a rigid grouting pipe into the lowest position of a grouting barrel, injecting grout into a bottom grout containing cavity of the grouting barrel through the grouting pipe, enabling a grouting valve to be pressed to extend out of the bottom grout containing cavity and penetrate into the stratum, enabling a first end of an outer sleeve to be close to the inner wall of the grouting barrel, enabling a hole sealing sliding plate to be extruded by the inner wall of the grouting barrel, overcoming the elasticity of a spring to slide relative to the outer wall of the outer sleeve until a through hole of the hole sealing sliding plate, a first outer sleeve grout circulation hole, a second outer sleeve grout circulation hole, a first interlayer sleeve grout circulation hole, a second inner drill core grout circulation hole and a grouting diffusion hole are communicated, and enabling the grout to flow into the stratum needing grouting reinforcement;
s4: stopping grouting after grouting is finished, enabling the hole sealing sliding plate to slide relative to the outer sleeve under the pulling force of the spring, sealing the grout flowing hole I of the outer sleeve, sucking grout in the grouting pipe, and forming negative pressure in the grouting barrel to enable the grouting valve to shrink;
s5: lifting the grouting pipe to the upper layer of the grout accommodating cavity, and repeating the steps S3-S4 until the grout conveying hole of the grouting pipe is lifted to the uppermost layer of the grout accommodating cavity until grouting in the direction is finished;
s6: rotating the grouting barrel 2 by 90 degrees, and repeating the steps S3-S5 for three times;
s7: and after grouting is finished, the grouting equipment is lifted.
Preferably, the grouting valve further comprises a sandwich sleeve assembly; the outer sleeve, the interlayer sleeve assembly and the inner drill core are sequentially nested and are connected in a sliding mode along the axial direction of the grouting valve.
Preferably, the interlayer sleeve assembly comprises at least one interlayer sleeve, and adjacent interlayer sleeves are nested with each other and are connected in a sliding manner along the axial direction of the interlayer sleeve assembly; the interlayer sleeve slurry circulation hole I is formed in the outer wall of the first end of the interlayer sleeve, the interlayer sleeve slurry circulation hole II is formed in the inner wall of the second end of the interlayer sleeve, and the interlayer sleeve slurry circulation hole I and the interlayer sleeve slurry circulation hole II are communicated through a slurry circulation channel II in the wall of the interlayer sleeve.
Preferably, the second end of the outer sleeve is provided with a first sliding tooth, and the outer wall of the interlayer sleeve assembly is provided with a first sliding groove matched with the first sliding tooth; and a second sliding tooth is arranged at the second end of the interlayer sleeve component, and a second sliding groove matched with the second sliding tooth is arranged on the outer wall of the inner drill core.
Preferably, the second end of the grouting barrel is formed by connecting a plurality of detachable sectional barrels; the grouting pipe is formed by connecting a plurality of detachable steel pipes.
The technical scheme of the invention has the following beneficial effects:
(1) according to the invention, the telescopic grouting valve is arranged on the side wall of the grouting barrel, so that the radius of a grouting range of grouting equipment is enlarged, the drilling density of grouting holes can be reduced, the drilling workload is reduced, the grouting reinforcement range is enlarged, the slurry diffusion radius is greatly improved, and the method is particularly practical in soft soil zones.
(2) According to the invention, the grout flow holes are formed in the two ends of the outer sleeve, the interlayer sleeve component and the inner drill core, the hole sealing sliding plate is arranged at the first end of the outer sleeve, when the grouting valve does not extend to the designated position, the grout passage is in a closed state, when the grouting valve extends to the designated position, the grout passage is communicated, grout flows to the grouting port along the grouting passage for grouting, so that the interior of the grouting barrel is closed and pressure-maintained before the grouting valve does not extend completely, grouting is started until the grouting valve extends to the designated position, and the effect of expanding the grouting radius is avoided by fully utilizing the pressure of the grout.
(3) According to the method, after grouting is finished, the hole sealing sliding plate can be used for plugging the outer sleeve grout flow hole I through pressure relief, the grout containing cavity in the grouting barrel is sealed again, the grouting valve can be contracted and returned by applying negative pressure in the grout containing cavity of the grouting barrel, the grouting valve can be stretched only by regulating and controlling grouting pressure, and the operation is simple and convenient.
(4) In the invention, the grouting pipe and the grouting barrel can be lengthened through the sectional steel pipe and the sectional barrel, and the grouting pipe and the grouting barrel are suitable for grouting reinforcement in grouting holes with different depths.
(5) According to the invention, the multiple layers of slurry containing cavities are arranged in the grouting barrel, the side wall of each slurry containing cavity is provided with the grouting valve, the grouting barrel can be suitable for grouting and reinforcing strata at different depths only by lifting the grouting pipe, the workload of workers for lifting the whole grouting equipment can be reduced, the radius of the grouting range of the grouting equipment is enlarged by mounting the telescopic grouting valve on the side wall of the grouting barrel, the drilling density of grouting holes can be reduced, the drilling workload is reduced, the grouting reinforcing range is enlarged, and the working efficiency is improved.
(6) In the invention, the sliding teeth and the sliding grooves are arranged on the inner drill core, the interlayer sleeve assembly and the outer sleeve, so that the positioning among the inner drill core, the interlayer sleeve assembly and the outer sleeve can be ensured, each slurry circulation hole can be aligned when the grouting valve extends to a specified position, the inner drill core and the interlayer sleeve assembly can be limited, and the inner drill core and the interlayer sleeve assembly are prevented from being separated from the grouting valve when extending.
(7) According to the invention, the limiting ring is arranged at the first end of the outer sleeve to prevent the outer sleeve from being separated from the grouting barrel when sliding out.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a first schematic sectional view of a karst cave grouting reinforcement method for a weak filler according to the application;
FIG. 2 is a schematic cross-sectional view II of a karst cave grouting reinforcement method for weak fillers according to the application;
FIG. 3 is a schematic structural view of an inner grouting pipe;
FIG. 4 is a schematic view of the construction of a grouting valve;
FIG. 5 is a schematic cross-sectional view of a grouting valve;
FIG. 6 is an end view of the second end of the grouting valve;
FIG. 7 is a schematic structural view of an inner core;
FIG. 8 is a schematic cross-sectional view of an inner core;
FIG. 9 is a schematic structural view of the outer sleeve;
FIG. 10 is a schematic structural view of a sandwich sleeve;
wherein, 1, a grouting pipe, 1.1, a grout conveying hole, 1.2, a piston ring, 2, a grouting barrel, 2.1, a clapboard, 2.2, the grout conveying barrel, 2.2.1, an injection hole, 3, a grouting valve, 3.1, an outer sleeve, 3.1.1, a grout circulating hole I and 3.1.2 of the outer sleeve, a grout circulating hole II and 3.1.3 of the outer sleeve, a grout circulating channel I and 3.1.4, a hole sealing sliding plate, 3.1.5, a spring, 3.1.6, a limiting ring, 3.1.7, a sliding tooth I and 3.1.8, a pulp flowing cylinder I and 3.1.9, the device comprises a spring frame, 3.1.10, a spring seat, 3.1.11, a groove, 3.2, an inner drill core, 3.2.1, an inner drill core slurry circulation hole, 3.2.2, a grouting diffusion hole, 3.2.3, an inner slurry circulation cavity, 3.2.4, a conical structure, 3.2.5, a second chute, 3.2.6, a stress end, 3.3, a sandwich sleeve component, 3.3.1, a first sandwich sleeve slurry circulation hole, 3.3.2, a second sandwich sleeve slurry circulation hole, 3.3.3, a second slurry circulation channel, 3.3.4, a first chute, 3.3.5, a second sliding tooth, 3.3.6 and a second pulp flow cylinder.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1 to 10, the embodiment is applied to karst cave grouting reinforcement, and is a method suitable for grouting and reinforcing a soft filler karst cave.
A grouting reinforcement method suitable for a soft filler karst cave is disclosed, and comprises a grouting pipe 1, a grouting barrel 2 and a grouting valve 3, and is shown in figures 1 to 2; a plurality of partition plates 2.1 are arranged inside the grouting barrel 2 along the height direction of the grouting barrel 2, and a slurry containing cavity is formed between each two adjacent partition plates 2.1 and the side wall of the grouting barrel 2; one end of the grouting pipe 1 penetrates through a partition plate 2.1 of the grouting barrel 2 and is used for conveying grout to each grout containing cavity in the grouting barrel 2; the side wall of the grouting barrel 2 is connected with a plurality of grouting valves 3 in a sliding mode, each grouting valve 3 is located between two layers of partition plates 2.1, in the embodiment, the axis of the grouting barrel 2 is perpendicular to the axis of each grouting valve 3, and the grouting valves are used for conveying grout to areas needing grouting reinforcement at different depths, so that the workload of workers for lifting grouting equipment is reduced, and the grouting work efficiency is improved;
the grouting barrel 2 is provided with a slurry conveying barrel 2.2 penetrating through the partition plate 2.1 along the height direction, the grouting pipe 1 is nested in the grouting barrel 2.2, the grouting pipe 1 is connected with the slurry conveying barrel 2.2 in a sliding manner along the height direction, and the side wall of the grouting barrel 2.2 is provided with a plurality of grouting holes 2.2.1 used for conveying slurry to each slurry containing cavity in the grouting barrel 2; the end face of one end of the grouting pipe 1 penetrating through the grouting barrel 2 is closed, a grouting hole 1.1 is formed in the side wall, piston rings 1.2 are arranged on two sides of the grouting hole 1.1 in the height direction of the grouting pipe 1, the distance between the two piston rings 1.2 is the same as the distance between the two layers of partition plates 2.1 of the grouting barrel 2, and the leakage between the grouting barrel 2.2 and the side wall of the grouting pipe 1 is prevented during grouting.
Referring to fig. 4 to 5, the grouting valve 3 comprises an outer sleeve 3.1, a sandwich sleeve assembly 3.3 and an inner drill core 3.2 which are sequentially nested and connected in a sliding mode along the axis of the grouting valve 3, and the grouting conveying range of the grouting equipment is expanded through the expansion and contraction of the grouting valve 3.
Referring to fig. 4-5, the first end of the outer sleeve 3.1 is provided with an outer sleeve slurry flow opening one 3.1.1 in the outer wall, the second end of the outer sleeve 3.1 is provided with an outer sleeve slurry flow opening two 3.1.2 in the inner wall, the outer sleeve slurry flow opening one 3.1.1 and the outer sleeve slurry flow opening two 3.1.2 are communicated through a slurry flow passage one 3.1.3 in the barrel wall of the outer sleeve 3.1; in the present embodiment, referring to fig. 9, a pulp flowing cylinder I3.1.8 is arranged along the length direction of the outer sleeve 3.1, and the pulp flowing channel I3.1.3 is positioned inside the pulp flowing cylinder I3.1.8;
referring to fig. 4, a first end of an outer sleeve 3.1 is provided with a hole sealing sliding plate 3.1.4, the hole sealing sliding plate 3.1.4 is in sliding connection with an outer wall of the outer sleeve 3.1, the hole sealing sliding plate 3.1.4 is provided with a through hole, one end of the hole sealing sliding plate 3.1.4 is connected with a first end of the outer sleeve 3.1 through a spring 3.1.5, the first end of the outer sleeve 3.1 is provided with a spring holder 3.1.9 and a spring holder 3.1.10, the spring 3.1.5 is sleeved on the spring holder 3.1.9, the first end of the spring 3.1.5 abuts against the spring holder 3.1.10, the second end of the spring 3.1.5 is connected with the hole sealing sliding plate 3.1.4 to control the opening and closing of an outer sleeve grout flow hole one 3.1.1.1 of the outer sleeve 3.1, when the outer sleeve 3.1 is extended out of a grouting barrel 2 by grouting pressure, one end of the hole sealing sliding plate 3.1.4 abuts against the inner wall of the grouting barrel 2, the other end of the spring 3.1 slides to the outer sleeve 3.1.10 direction, and the outer sleeve 3.1 is aligned with the through hole sealing sliding plate 3.4; when grouting pressure is unloaded, the outer sleeve 3.1 retracts into the grouting barrel 2 under the action of grouting suction pressure, the hole sealing sliding plate 3.1.4 slides relative to the outer sleeve 3.1 under the action of the elastic force of the spring 3.1.5, the outer sleeve grout through hole I3.1.1 is staggered with the through hole of the hole sealing sliding plate 3.1.4, and the outer sleeve grout through hole I3.1.1 is closed.
Referring to fig. 4, the first end of the outer sleeve 3.1 is provided with a limit ring 3.1.6 for preventing the outer sleeve 3.1 from separating from the grouting barrel 2 when sliding out; the second end of the outer sleeve 3.1 is directed through the sidewall of the tub 2 to the outside of the tub 2.
The interlayer sleeve assembly 3.3 comprises at least one interlayer sleeve, and adjacent interlayer sleeves are nested with each other and are connected in a sliding manner along the axial direction of the interlayer sleeve assembly 3.3; in this embodiment, the interlayer sleeve assembly 3.3 comprises an interlayer sleeve, the first end of the interlayer sleeve is provided with an interlayer sleeve slurry circulation hole one 3.3.1 on the outer wall, the second end of the interlayer sleeve is provided with an interlayer sleeve slurry circulation hole two 3.3.2 on the inner wall, and the interlayer sleeve slurry circulation hole one 3.3.1 and the interlayer sleeve slurry circulation hole two 3.3.2 are communicated through a slurry circulation channel two 3.3.3 in the cylinder wall of the interlayer sleeve; in this embodiment, referring to fig. 10, the sandwich sleeve is provided with a second pulp flowing cylinder 3.3.6 along the length direction thereof, the second pulp flowing channel 3.3.3 is positioned inside the second pulp flowing cylinder 3.3.6, and the inner wall of the outer sleeve 3.1 is provided with a groove 3.1.11 matched with the second pulp flowing cylinder 3.3.6; by arranging the first pulp flowing cylinder 3.1.8 and the second pulp flowing cylinder 3.3.6, the channel sections of the first pulp flowing channel 3.1.3 and the second pulp flowing channel 3.3.3 can be enlarged, and the integral wall thickness of the outer sleeve 3.1 and the interlayer sleeve can be reduced;
referring to fig. 7 to 8, the first end of the inner drill core 3.2 is provided with an inner drill core slurry flowing hole 3.2.1 on the side wall, the second end of the inner drill core 3.2 is provided with a grouting diffusion hole 3.2.2, and the inner drill core slurry flowing hole 3.2.1 and the grouting diffusion hole 3.2.2 are communicated through an inner slurry flowing cavity 3.2.3 of the inner drill core 3.2.
Referring to fig. 5 to 8, the second end of the inner core 3.2 is a conical structure 3.2.4 for penetrating the formation for grouting when the inner core 3.2 is extended, the first end of the inner core 3.2 is a planar force-bearing end 3.2.6, the force-bearing end 3.2.6 is pressed by grout, so that the inner core 3.2 and the interlayer sleeve assembly 3.3 slide relatively, and meanwhile, the planar force-bearing end 3.2.6 can seal the inner grout flow cavity 3.2.3 to prevent grout from flowing out from the first end of the inner core 3.2.
Referring to fig. 7 to 10, the second end of the outer sleeve 3.1 is provided with a sliding tooth one 3.1.7, and the outer wall of the interlayer sleeve component 3.3 is provided with a sliding groove one 3.3.4 matched with the sliding tooth one 3.1.7; the second end of the interlayer sleeve component 3.3 is provided with a sliding tooth II 3.3.5, the outer wall of the inner drill core 3.2 is provided with a sliding groove II 3.2.5 matched with the sliding tooth II 3.3.5, so that the slip casting valve 3 can stretch and limit, and the outer sleeve 3.1, the interlayer sleeve component 3.3 and the inner drill core 3.2 are prevented from separating when extending out.
Injecting grout into a grouting barrel 2 by using a rigid grouting pipe 1, enabling a stress end 3.2.6 of an inner drill core 3.2 to be stressed to extend out of the grouting barrel 2 so as to drive an interlayer sleeve component 3.3 and an outer sleeve 3.1 to extend out of the grouting barrel 2, when a grouting valve 3 extends to a limit position, a through hole on a hole sealing sliding plate 3.1.4 is aligned with an outer sleeve grout through hole one 3.1.1 of the outer sleeve 3.1, an outer sleeve grout through hole two 3.1.2 of the outer sleeve 3.1 is aligned with an interlayer sleeve grout through hole one 3.3.1 of the interlayer sleeve component 3.3, an interlayer sleeve grout through hole two 3.3.2 of the interlayer sleeve component 3.3 is aligned with an inner drill core grout through hole 3.2.1 of the inner drill core 3.2 so as to form a grout passage, enabling the grout to flow out of the grouting barrel 2 to a grouting position, grouting reinforcement is carried out of a stratum, when the grouting valve 3 does not extend to the limit position, the grout through holes on the interlayer sleeve component 3.2 are in a closed state, when the grouting valve 3 only comprises the outer sleeve 3.1 and the inner drill core 3.2, the sliding teeth I3.1.7 of the outer sleeve 3.1 are matched with the sliding grooves II 3.2.5 of the inner drill core 3.2, and the outer sleeve grout passage II 3.1.2 of the outer sleeve 3.1 is aligned with the inner drill core grout passage 3.2.1 of the inner drill core 3.2 to form a grout passage.
Referring to fig. 1 to 2, the top end of the grouting barrel 2 is formed by connecting a plurality of detachable sectional barrels for increasing the height of the grouting barrel 2, in the embodiment, the sectional barrels are connected through threads; the grouting pipe 1 is formed by connecting a plurality of detachable steel pipes and is used for increasing the height of the grouting pipe 1, and in the embodiment, the steel pipes of the grouting pipe 1 are connected through threads.
The lateral wall junction of slip casting valve 3 and slip casting bucket 2 is equipped with sealing device for 2 take place the thick liquid of slip casting bucket and reveal when preventing that slip casting valve 3 from stretching out.
A grouting reinforcement method suitable for a soft filler karst cave adopts the grouting reinforcement method suitable for the soft filler karst cave, a grouting pipe 1 slides in the height direction of a slurry conveying barrel 2.2 to perform grouting reinforcement on strata of different depths, and the concrete steps are as follows:
s1: appointing a grouting position according to geological design, measuring and positioning a grouting hole, and drilling the grouting hole by using a drill carriage;
s2: assembling the grouting pipe 1 and the grouting barrel 2 to a required height, putting the assembled grouting equipment into the bottom of the grouting hole punched in the S1, wherein the upper parts of the grouting pipe 1 and the grouting barrel 2 are higher than the ground surface;
s3: grouting, namely, extending a rigid grouting pipe 1 into the lowest position of a grouting barrel 2, injecting grout into a bottom grout containing cavity of the grouting barrel 2 through the grouting pipe 1, enabling a grouting valve 3 to be pressed to extend out to penetrate into a stratum, enabling a first end of an outer sleeve 3.1 to be close to the inner wall of the grouting barrel 2, extruding a hole sealing sliding plate 3.1.4 by the inner wall of the grouting barrel 2, overcoming the elasticity of a spring 3.1.5 to slide relative to the outer wall of the outer sleeve 3.1 until a through hole of the hole sealing sliding plate 3.1.4, a grout circulating hole I of the outer sleeve 3.1.1, a grout circulating hole II of the outer sleeve 3.2, a grout circulating hole I of an interlayer sleeve 3.3.1, a grout circulating hole II of the interlayer sleeve 3.3.3.2, a grout circulating hole II of an inner drill core 3.2.1 and a grouting diffusion hole 3.2.2 are communicated, and enabling the grout to flow into a stratum to be grouted and reinforced;
s4: stopping grouting after grouting is finished, enabling the hole sealing sliding plate 3.1.4 to slide relative to the outer sleeve 3.1 under the pulling force of the spring 3.1.5, plugging the outer sleeve grout flow hole I3.1.1, sucking grout in the grouting pipe 1, and forming negative pressure in the grouting barrel 2 to enable the grouting valve 3 to shrink;
s5: lifting the grouting pipe 1 to the upper layer of the grout accommodating cavity, and repeating the steps S3-S4 until the grout conveying hole 1.1 of the grouting pipe 1 is lifted to the uppermost layer of the grout accommodating cavity until grouting in the direction is completed;
s6: rotating the grouting barrel 2 by 90 degrees, and repeating the steps S3-S5 for three times;
s7: and after grouting is finished, the grouting equipment is lifted.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A grouting reinforcement method suitable for a soft filler karst cave adopts grouting reinforcement equipment suitable for the soft filler karst cave, a grouting pipe (1) slides in the height direction of a slurry conveying barrel (2.2) to perform grouting reinforcement on strata of different depths, and the concrete steps are as follows:
s1: appointing a grouting position according to geological design, measuring and positioning a grouting hole, and drilling the grouting hole by using a drill carriage;
s2: the grouting reinforcement equipment suitable for the soft filler karst cave is adopted, and comprises a grouting pipe (1), a grouting barrel (2) and a grouting valve (3); a plurality of partition plates (2.1) are arranged inside the grouting barrel along the height direction of the grouting barrel, a grout containing cavity is formed by two adjacent partition plates and the side wall of the grouting barrel, a plurality of telescopic grouting valves are connected to the side wall of the grouting barrel in a sliding manner, and each grouting valve is positioned between two layers of partition plates; one end of the grouting pipe, which is provided with a grout conveying hole (1.1), penetrates through a partition plate of the grouting barrel to be in sliding connection with the grouting barrel along the height direction, and piston rings (1.2) are arranged on two sides of the grout conveying hole along the height direction of the grouting pipe; the grouting barrel is provided with a grout conveying barrel (2.2) penetrating through a partition plate in the height direction, the grouting pipe is nested in the grout conveying barrel and is connected with the grout conveying barrel in a sliding manner in the height direction, the side wall of the grout conveying barrel is provided with a plurality of grouting holes (2.2.1) used for conveying grout into each grout containing cavity in the grouting barrel, the grouting valve comprises an outer sleeve (3.1) and an inner drill core (3.2) which are sequentially nested and connected in a sliding manner in the axial direction of the grouting valve, the outer wall of the first end of the outer sleeve is provided with a first outer sleeve grout circulation hole (3.1.1), the inner wall of the second end of the outer sleeve is provided with a second outer sleeve grout circulation hole (3.1.2), the first outer sleeve grout circulation hole and the second outer sleeve are communicated through a first grout circulation channel (3.1.3) in the cylinder wall of the outer sleeve, the first end of the outer sleeve is provided with a hole sealing sliding plate (3.1.4), and the hole sealing sliding plate is connected with the outer wall of the outer sleeve in a sliding manner, one end of the hole sealing sliding plate is connected with the first end of the outer sleeve through a spring (3.1.5), an inner drill core slurry circulation hole (3.2.1) is formed in the side wall of the first end of the inner drill core, a grouting diffusion hole (3.2.2) is formed in the second end of the inner drill core, and the inner drill core slurry circulation hole and the grouting diffusion hole are communicated through an inner slurry circulation cavity (3.2.3) of the inner drill core; assembling the grouting pipe (1) and the grouting barrel (2) to a required height, putting the assembled grouting equipment into the bottom of a grouting hole punched in S1, wherein the upper parts of the grouting pipe (1) and the grouting barrel (2) are higher than the ground surface;
s3: grouting, namely extending a rigid grouting pipe (1) into the lowest position of a grouting barrel (2), injecting grout into a bottom-layer grout accommodating cavity of the grouting barrel (2) through the grouting pipe (1), enabling a grouting valve (3) to be pressed to extend out to penetrate into a stratum, enabling a first end of an outer sleeve (3.1) to be close to the inner wall of the grouting barrel (2), extruding a hole sealing sliding plate (3.1.4) by the inner wall of the grouting barrel (2), overcoming the elastic force of a spring (3.1.5) to relatively slide with the outer wall of the outer sleeve (3.1) until a through hole of the hole sealing sliding plate (3.1.4), a first outer sleeve grout circulation hole (3.1.1), a second outer sleeve grout circulation hole (3.1.2), a first interlayer sleeve grout circulation hole (3.3.3.1), a second interlayer grout circulation hole (3.3.3.2.2), an inner drill core grout circulation hole (3.2.1) and a grouting diffusion hole (3.2.2.2) are communicated, and the grout needs to flow into a grouting reinforcement ground;
s4: stopping grouting after grouting is finished, enabling the hole sealing sliding plate (3.1.4) to slide relative to the outer sleeve (3.1) under the pulling force of the spring (3.1.5), plugging the outer sleeve grout flow hole I (3.1.1), sucking grout in the grouting pipe (1), and forming negative pressure in the grouting barrel (2) to enable the grouting valve (3) to shrink;
s5: lifting the grouting pipe 1 to the upper layer of the grout accommodating cavity, and repeating the steps S3-S4 until the grout conveying hole (1.1) of the grouting pipe (1) is lifted to the upper layer of the grout accommodating cavity until grouting in the direction is finished;
s6: rotating the grouting barrel (2) by 90 degrees, and repeating the steps S3-S5 for three times;
s7: after grouting is finished, lifting grouting equipment;
the grouting valve further comprises a sandwich sleeve assembly (3.3); the outer sleeve, the interlayer sleeve assembly and the inner drill core are sequentially nested and are in sliding connection along the axial direction of the grouting valve;
the interlayer sleeve assembly comprises at least one interlayer sleeve, and adjacent interlayer sleeves are nested with each other and are connected in a sliding manner along the axial direction of the interlayer sleeve assembly; the interlayer sleeve slurry circulation device is characterized in that a first interlayer sleeve slurry circulation hole (3.3.1) is formed in the outer wall of the first end of the interlayer sleeve, a second interlayer sleeve slurry circulation hole (3.3.2) is formed in the inner wall of the second end of the interlayer sleeve, and the first interlayer sleeve slurry circulation hole and the second interlayer sleeve slurry circulation hole are communicated through a second interlayer sleeve slurry circulation channel (3.3.3).
2. The grouting reinforcement method for the weak filler karst cave according to claim 1, characterized in that the second end of the outer sleeve is provided with a first sliding tooth (3.1.7), the outer wall of the sandwich sleeve assembly is provided with a first sliding groove (3.3.4) matched with the first sliding tooth; and a second sliding tooth (3.3.5) is arranged at the second end of the interlayer sleeve component, and a second sliding groove (3.2.5) matched with the sliding tooth is arranged on the outer wall of the inner drill core.
3. The method for grouting reinforcement of a karst cave suitable for soft fillers according to claim 1, wherein the second end of the grouting barrel is formed by connecting a plurality of detachable sectional barrels; the grouting pipe is formed by connecting a plurality of detachable steel pipes.
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| CN115387322B (en) * | 2022-04-19 | 2023-08-04 | 西南石油大学 | Multi-angle grouting soil body reinforcing device for helping slurry global diffusion |
| CN114908733B (en) * | 2022-05-18 | 2023-07-18 | 郑州大学 | Underground crushed stone sand layer expansion type grouting pipe and grouting method thereof |
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| CN105908585A (en) * | 2016-04-08 | 2016-08-31 | 天津市市政工程设计研究院 | Road foundation or base and building soft foundation grouting reinforcement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105908585A (en) * | 2016-04-08 | 2016-08-31 | 天津市市政工程设计研究院 | Road foundation or base and building soft foundation grouting reinforcement method |
| CN207079577U (en) * | 2017-07-04 | 2018-03-09 | 深圳市孺子牛建设工程有限公司 | Pile for prestressed pipe |
| CN108797561A (en) * | 2018-05-24 | 2018-11-13 | 广东诚创建设有限公司 | Soft foundation Grouting Pipe and the foundation stabilization reinforcement for utilizing the Grouting Pipe |
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