A fast segmented retreat grouting device and grouting method

Abstract

The invention discloses a fast segmented retreat grouting device and a grouting method, comprising a grouting hose and a multi-segment support sleeve, wherein the multi-segment support sleeve is detachably connected in sequence in the axial direction; the rear end of each support sleeve has a large inner diameter section, and the front end has a small outer diameter section; each support sleeve includes a support sleeve male piece and a support sleeve female piece, and the support sleeve male piece and the support sleeve female piece are both semi-cylindrical shells, and the two enclose a cylindrical shell; the front end of the grouting hose is used to connect with the grouting gun head to form a grouting pipeline. The support sleeve is used to wrap the grouting hose, and carry the grouting hose and the grouting gun head forward and coaxially insert into the bottom of the sleeve valve tube; and after completing the grouting of this section, the support sleeve and the grouting pipeline are pulled out upward until all the grouting of each section of the borehole is completed. The fast segmented retreat grouting device realizes the anti-bubble lock head and the support sleeve to prevent the grouting pipeline from bubbling and the continuous and rapid operation of grouting in each section.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering underground projects, and in particular relates to a fast segmented retreat grouting device and a grouting method. Background Art

[0002] With the continuous construction of underground projects, more and more complex geological conditions are encountered during the construction process, and it is necessary to pre-grout the weak and water-rich strata. Among them, the surface sleeve valve pipe grouting process is widely used due to its convenience.

[0003] However, the existing surface sleeve valve pipe grouting process often requires workers to press down the grouting pipeline to prevent it from deviating from the designed grouting depth due to the reaction of grouting pressure. In addition, in the process of segmented backward grouting, a section of the grouting pipeline needs to be removed and reconnected for each grouting section, which is time-consuming and prone to pipeline leakage, which has an adverse effect on the grouting quality and civilized construction. Summary of the invention

[0004] The purpose of the present invention is to provide a rapid segmented backward grouting device and a grouting method, which realizes the prevention of grouting pipeline grouting and the continuous and rapid operation of grouting in each section through an anti-bubble lock head and a supporting sleeve.

[0005] The present invention adopts the following technical scheme: a fast segmented retreat grouting device, comprising a grouting hose and a plurality of support sleeves, wherein the plurality of support sleeves are sequentially detachably connected in the axial direction; the rear end of each support sleeve has a large inner diameter section, and the front end has a small outer diameter section;

[0006] Each supporting sleeve includes a supporting sleeve male piece and a supporting sleeve female piece, and both the supporting sleeve male piece and the supporting sleeve female piece are semi-cylindrical shells, and the two enclose a cylindrical shell;

[0007] The front end of the grouting hose is used to connect with the grouting gun head to form a grouting pipeline;

[0008] The support sleeve is used to wrap the grouting hose, and carry the grouting hose and the grouting gun head forward coaxially and insert it into the bottom of the sleeve valve tube; and after completing the grouting of this section, pull out the support sleeve and the grouting pipeline upward until reaching the next designed grouting section height, slide the support sleeve along the axial direction to pull out the male piece of the support sleeve at the rear end, and then pull out the female piece of the support sleeve to complete the removal of this section of the support sleeve; pull out the support sleeve and the grouting pipeline upward in sequence, disassemble the support sleeve at the rear end, until all grouting of each section of the borehole is completed.

[0009] Furthermore, the upper end of the support sleeve mother sheet and the two edge ends are stepped to form a groove that is high near the edge and low inside;

[0010] Both side edges of the upper end of the male piece of the support sleeve are provided with protruding thin sheets extending toward the female piece of the support sleeve, and a downward clamping sheet is integrally connected to the lower edge of the end of the protruding thin sheet, and an upwardly concave groove is formed between the clamping sheet and the edge of the male piece of the support sleeve; when the male piece of the support sleeve and the female piece of the support sleeve are enclosed into a cylindrical shell, the clamping sheet is used to clamp in the groove of the female piece of the support sleeve.

[0011] Furthermore, a concave limiting groove is opened on the outer wall of the upper end of the support sleeve male piece and the support sleeve female piece in a semi-circular manner; a support sleeve error limiting ring is coaxially sleeved in the concave limiting groove, and the support sleeve error limiting ring is formed by two semi-rings and is used to fix the support sleeve male piece and the support sleeve female piece.

[0012] Furthermore, it also includes an anti-counterfeit lock head, which includes an anti-counterfeit lock head connecting sleeve and an anti-counterfeit lock head bite cover;

[0013] The anti-counterfeit lock head connecting sleeve is cylindrical, and its lower end is coaxially sleeved on the top of the sleeve valve tube, and its upper end is coaxially connected to the anti-counterfeit lock head base. The outer contour of the anti-counterfeit lock head base is a rectangular parallelepiped, with a cylindrical hole in the middle, which is connected to the anti-counterfeit lock head connecting sleeve;

[0014] The anti-counterfeiting lock bite cover is formed by enclosing two semi-rectangular shells, each semi-rectangular shell is provided with a top cover on the top, and a semi-circular opening is opened on each top cover, and the semi-circular opening end passes through the top cover and faces the semi-rectangular shell on the opposite side; the two semi-circular openings enclose a circular opening;

[0015] The lower end of each semi-rectangular shell is open, and the front and rear side plates of each semi-rectangular shell are integrally connected with a triangular plate with the tip pointing downward. The tip of each triangular plate is hingedly connected to the front and rear side walls of the anti-counterfeiting lock base. The two semi-rectangular shells can be rotated relative to each other or back to back to achieve the enclosure or opening of the two; when the two semi-rectangular shells are enclosed, a circular hole is formed in the middle, which fits well with the concave limit groove at the upper end of the support sleeve to achieve temporary fixation.

[0016] Furthermore, an anti-counterfeit lock key is provided on the anti-counterfeit lock connecting sleeve. There are two anti-counterfeit lock keys, both of which are door-shaped metal objects. The left and right ends of the lower end of each door-shaped metal object are respectively provided with vertically downward cylindrical pins. The cylindrical pins are used to insert into the vertical openings on the upper wall of the anti-counterfeit lock cover, so as to fix the two left and right semi-rectangular shells.

[0017] Furthermore, the grouting gun head comprises a grouting gun head rubber plug, a grouting gun head grouting pipe and a grouting gun head master plate, wherein:

[0018] The rubber plug of the grouting gun head is a cylindrical rubber piston, which has a through hole in the vertical axis, and its outer diameter matches the inner diameter of the sleeve valve tube. It is coaxially sleeved in the sleeve valve tube to prevent the slurry from flowing back to the ground along the sleeve valve tube.

[0019] The grouting gun head master plate is a cylindrical tube, whose outer diameter is consistent with the outer diameter of the grouting gun head rubber plug, and whose inner wall is stepped, and the inner diameter of the upper section of the cylindrical tube is larger than the inner diameter of the lower section; its front end is coaxially connected with the rear end of the grouting gun head rubber plug, and is coaxially sleeved in the sleeve valve tube;

[0020] The grouting gun head grouting pipe is a metal pipe, the upper end of which is connected to the front end of the grouting hose;

[0021] The grouting gun head grouting pipe and the grouting hose coaxially pass through the grouting gun head rubber plug and the grouting gun head mother plate, and the grouting gun head grouting pipe passes through the grouting gun head rubber plug forward.

[0022] Furthermore, the inner diameter of the upper section of the grouting gun head master disc is consistent with the small outer diameter of the front end of the support sleeve, and the small outer diameter section of the front end of the support sleeve is coaxially sleeved on the upper section of the grouting gun head master disc to fix the front end of the support sleeve.

[0023] Furthermore, a plurality of sleeve valve tube overflow hole areas are arranged at intervals on the sleeve valve tube body, and a plurality of sleeve valve tube overflow hole areas are opened in each sleeve valve tube overflow hole area; a plurality of sleeve valve tube rubber sleeves are provided on the sleeve valve tube body, and each sleeve valve tube rubber sleeve is sleeved on and covers the sleeve valve tube overflow hole area; the sleeve valve tube rubber sleeve is used to ensure that the slurry flows out of the sleeve valve tube body in one direction under the action of pressure, and the slurry is injected into the formation from the sleeve valve tube body through the sleeve valve tube overflow hole and pushes open the sleeve valve tube rubber sleeve.

[0024] The present invention also discloses a grouting method of the above-mentioned rapid segmented retreat grouting device, and the grouting method comprises the following steps:

[0025] Step S1, drilling a hole on the ground surface to a designed depth; inserting a sleeve valve tube into the hole, with the upper end of the sleeve valve tube located above the ground surface;

[0026] Step S2, coaxially sleeve the anti-counterfeiting lock head connecting sleeve on the end of the sleeve valve pipe on the ground surface and fix it;

[0027] Step S3, the front end of the grouting hose is connected to the grouting gun head grouting pipe, and the grouting hose is coaxially sleeved in the connected grouting gun head rubber plug and the grouting gun head mother plate; the grouting hose and the grouting gun head are connected to form a grouting pipeline;

[0028] And complete the installation of the front support casing;

[0029] At the upper end of the installed front cylindrical shell, coaxially install each section of the support sleeve in sequence, and continuously coaxially insert the anti-fleeting lock head and the sleeve valve pipe downward until the grouting gun head grouting pipe is inserted into the bottom of the sleeve valve pipe;

[0030] Step S4, the two anti-capturing lock bite covers are rotated relative to each other to fit together, and the upper ends thereof are fitted and matched with the concave limit grooves at the upper end of the support sleeve, and the anti-capturing lock key is inserted to temporarily fix the grouting pipeline;

[0031] Step S5, start grouting, the slurry is injected into the sleeve valve pipe through the pipeline, through the sleeve valve pipe overflow hole, pushes open the sleeve valve pipe rubber sleeve, and is injected into the formation; after reaching the designed grouting pressure and designed grouting volume, the grouting of this section is completed.

[0032] Step S6, pull out the grouting pipeline upwards, and when it is pulled to the next designed grouting section height, remove the uppermost support sleeve, remove the support sleeve limit ring, and then slide the support sleeve male piece upwards along the axial direction of the support sleeve to pull out the support sleeve female piece, so that the tip and the upper end are released at the same time, and then pull out the support sleeve female piece to complete the removal of this section of the support sleeve; and fix the anti-fleeting lock again;

[0033] Step S7, repeat the grouting in step S5 to complete the grouting of this section;

[0034] Step S8, repeat steps S6-S7 until all grouting of each section of the current borehole is completed.

[0035] Furthermore, the process of step S3 is as follows: wrap the grouting hose with the support sleeve mother piece, and insert the front tip into the upper section of the grouting gun head mother disc, then align the support sleeve male piece with the support sleeve mother piece to wrap the grouting hose, and at the same time slide the support sleeve male piece along the axis to insert the front end into the upper section of the grouting gun head mother disc, and the holding piece is held in the groove of the support sleeve mother piece, and the support sleeve male piece and the support sleeve mother piece form a cylindrical shell; embed the support sleeve limit ring into the concave limit groove.

[0036] The beneficial effects of the present invention are: 1. Grouting is performed using a grouting hose, and the grouting hose is supported by covering multiple sections of supporting sleeves, each section of the supporting sleeves can be detachably connected, and after completing the grouting of the front section, the grouting pipeline is drawn upward to the next grouting position, and the supporting sleeve at the rear end is removed. There is no need to remove the grouting hose, and grouting is performed continuously. 2. After the grouting pressure is generated, the reaction force acts on the rubber plug of the grouting gun head, causing the anti-burst lock to bite the support pipe, thereby avoiding manual suppression of the burst pipe and saving labor. 3. The grouting gun head mother disk seals the slurry to prevent the slurry from flowing back to the ground along the sleeve valve pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a rapid segmented retreat grouting device Figure 1 ;

[0038] Figure 2 It is a structural schematic diagram of the supporting casing;

[0039] Figure 3 It is a schematic diagram of the structure of the anti-counterfeiting lock;

[0040] Figure 4 A schematic diagram of a rapid segmented retreat grouting device Figure 2 ;

[0041] Figure 5 It is an assembly diagram of accessories in the head area of ​​a fast segmented retreat grouting gun;

[0042] Figure 6 It is a schematic diagram of a rapid segmented retreat grouting process;

[0043] Among them: 1. Sleeve valve tube; 1-1. Sleeve valve tube body; 1-2. Sleeve valve tube rubber sleeve; 1-3. Sleeve valve tube overflow hole; 2. Grouting hose; 3. Grouting core tube; 3-1. Grouting core tube section; 3-2. Grouting core tube connecting tube; 3-3. Grouting core tube connecting head; 4. Support sleeve; 4-1. Support sleeve male piece; 4-2. Support sleeve female piece; 4-3. Support sleeve error limiting ring; 5. Anti-counterfeit lock; 5-1. Anti-counterfeit lock connecting sleeve; 5-2. Anti-counterfeit lock base; 5-3. Anti-counterfeit lock bite cover; 5-4. Anti-counterfeit lock key; 6. Grouting gun head; 6-1. Grouting gun head rubber plug; 6-2. Grouting gun head slurry pipe; 6-3. Grouting gun head mother disk; 7. Shell material. DETAILED DESCRIPTION

[0044] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] The present invention discloses a rapid segmented retreat grouting device, such as Figure 1 , 2 As shown in 4, it includes a grouting hose 2 and a multi-section supporting sleeve 4, wherein the multi-section supporting sleeve 4 is detachably connected in sequence in the axial direction; the rear end of each supporting sleeve 4 has a large inner diameter section, and the front end has a small outer diameter section; the grouting hose 2 is made of rubber, and there is a wire mesh inside the pipe wall, which can withstand a large grouting pressure.

[0046] Specifically, the front end of the support sleeve 4 has a 10 cm outer diameter contraction section, and the upper end is a 10 cm inner diameter expansion section. Multiple sections of the support sleeve 4 can be joined end to end to form a longer support pipe system.

[0047] Each support sleeve 4 includes a support sleeve male piece 4-1 and a support sleeve female piece 4-2, and the support sleeve male piece 4-1 and the support sleeve female piece 4-2 are both semi-cylindrical shells, and the two enclose a cylindrical shell; the front end of the grouting hose 2 is used to connect with the grouting gun head 6 to form a grouting pipeline;

[0048] The support sleeve 4 is used to wrap the grouting hose 2, and carry the grouting hose 2 and the grouting gun head 6 forward and coaxially inserted into the bottom of the sleeve valve tube 1; and after completing the grouting of this section, pull out the support sleeve 4 and the grouting pipeline upward until reaching the next designed grouting section height, slide the support sleeve 4 axially to pull out the support sleeve male piece 4-1 at the rear end, and then pull out the support sleeve female piece 4-2 to complete the removal of this section of the support sleeve 4; pull out the support sleeve 4 and the grouting pipeline upward in sequence, disassemble the support sleeve 4 at the rear end, until all grouting of each section of the borehole is completed.

[0049] The upper end of the supporting sleeve mother sheet 4-2 is stepped at both edge ends to form a groove with a high side near the edge and a low inside;

[0050] Both side edges of the upper end of the support sleeve male piece 4-1 are provided with protruding thin pieces extending toward the support sleeve female piece 4-2, and a downward clamping piece is integrally connected to the lower edge of the end of the protruding thin piece, and an upward concave groove is formed between the clamping piece and the edge of the support sleeve male piece 4-1; when the support sleeve male piece 4-1 and the support sleeve female piece 4-2 are enclosed into a cylindrical shell, the clamping piece is used to clamp in the groove of the support sleeve female piece 4-2.

[0051] A concave limiting groove is provided on the outer wall of the upper end of the supporting sleeve male piece 4-1 and the supporting sleeve female piece 4-2 in a circumferential semicircular manner; a supporting sleeve error limiting ring 4-3 is coaxially sleeved in the concave limiting groove, and the supporting sleeve error limiting ring 4-3 is formed by two half rings and is used to fix the supporting sleeve male piece 4-1 and the supporting sleeve female piece 4-2.

[0052] The male support sleeve piece 4-1 and the female support sleeve piece 4-2 are both ferromagnetic semi-cylindrical shells. The male support sleeve piece 4-1 and the female support sleeve piece 4-2 are butted together to form a cylindrical shell, which is ferromagnetic so that it can be adsorbed by a magnet.

[0053] The outer diameter of the cylindrical shell is smaller than the inner diameter of the sleeve valve tube 1 , and the inner diameter is larger than the outer diameter of the grouting hose 2 , so as to realize a three-layer structure in which the sleeve valve tube 1 wraps the supporting sleeve 4 , and the supporting sleeve 4 wraps the grouting hose 2 .

[0054] The outer walls of the upper ends of the male support sleeve piece 4-1 and the female support sleeve piece 4-2 are both provided with concave limiting grooves in a semicircular manner; a supporting sleeve error limiting ring 4-3 is coaxially sleeved in the concave limiting groove, and the supporting sleeve error limiting ring 4-3 is formed by two semi-rings and is used to fix the male support sleeve piece 4-1 and the female support sleeve piece 4-2. The two seams of the two semi-rings of the supporting sleeve error limiting ring 4-3 do not overlap with the two seams of the male support sleeve piece 4-1 and the female support sleeve piece 4-2. At this time, the tip of the supporting sleeve 4 is fixed by the grouting gun head master disc 6-3, and the pieces cannot be opened, forming a firm ring structure.

[0055] The protruding thin slices and the grooves are both in the shape of rectangular parallelepiped and have the same size, so as to achieve a firm buckling of the supporting sleeve male slice 4-1 and the supporting sleeve female slice 4-2.

[0056] like Figure 3 As shown, it also includes an anti-counterfeit lock 5, which includes an anti-counterfeit lock connecting sleeve 5-1 and an anti-counterfeit lock bite cover 5-3;

[0057] The anti-counterfeit lock connecting sleeve 5-1 is cylindrical, and its lower end is coaxially sleeved on the top of the sleeve valve tube 1, and its upper end is coaxially connected to the anti-counterfeit lock base 5-2. The outer contour of the anti-counterfeit lock base 5-2 is a rectangular parallelepiped with a cylindrical hole in the middle, which is connected to the anti-counterfeit lock connecting sleeve 5-1; two rings of small holes are arranged on the cylinder body, each ring has 4 holes, which are 90 degrees apart, and the two rings of small holes are staggered in a plum blossom arrangement. Screws can be installed through the small holes to firmly connect the anti-counterfeit lock 5 and the sleeve valve tube 1 as one.

[0058] The anti-counterfeiting lock bite cover 5-3 is formed by enclosing two semi-rectangular shells, each semi-rectangular shell is provided with a top cover on the top, and a semicircular opening is opened on each top cover, and the semicircular opening end passes through the top cover and faces the semi-rectangular shell on the opposite side; the two semicircular openings enclose a circular opening;

[0059] The lower end of each semi-rectangular shell is open, and the front and rear side plates of each semi-rectangular shell are integrally connected with a triangular plate with the tip pointing downward, and the tip of each triangular plate is hingedly connected to the front and rear side walls of the anti-counterfeiting lock base 5-2. The two semi-rectangular shells can rotate relative to each other or back to back to achieve the enclosure or opening of the two; when the two semi-rectangular shells are enclosed, a circular hole is formed in the middle, which fits the concave limit groove at the upper end of the support sleeve 4. After the anti-counterfeiting lock bite cover 5-3 bites the support sleeve 4, the support sleeve 4 cannot move, achieving temporary fixation;

[0060] An anti-counterfeit lock key 5-4 is arranged on the anti-counterfeit lock connecting sleeve 5-1. There are two anti-counterfeit lock keys 5-4, both of which are door-shaped metal objects. The left and right ends of the lower end of each door-shaped metal object are respectively provided with vertically downward cylindrical pins, which are used to insert into the vertical openings on the upper wall of the anti-counterfeit lock bite cover 5-3, and are used to fix the two left and right semi-rectangular shells.

[0061] like Figure 5 As shown, the grouting gun head 6 includes a grouting gun head rubber plug 6-1, a grouting gun head grouting pipe 6-2 and a grouting gun head master plate 6-3, wherein:

[0062] The grouting gun head rubber plug 6-1 is a cylindrical rubber piston, which has a through hole in the vertical axis, and its outer diameter matches the inner diameter of the sleeve valve tube 1. It is coaxially sleeved in the sleeve valve tube 1 to prevent the slurry from flowing back to the ground along the sleeve valve tube 1;

[0063] The grouting gun head master plate 6-3 is a cylindrical tube, whose outer diameter is consistent with the outer diameter of the grouting gun head rubber plug 6-1, and whose inner wall is stepped, and the inner diameter of the upper section of the cylindrical tube is larger than the inner diameter of the lower section; its front end is coaxially connected with the rear end of the grouting gun head rubber plug 6-1, and is coaxially sleeved in the sleeve valve tube 1;

[0064] The grouting gun head grouting pipe 6-2 is a metal pipe, and its upper end is connected to the front end of the grouting hose 2;

[0065] The grouting gun head grouting pipe 6-2 and the grouting hose 2 coaxially pass through the grouting gun head rubber plug 6-1 and the grouting gun head mother plate 6-3, and the grouting gun head grouting pipe 6-2 passes through the grouting gun head rubber plug 6-1 forward.

[0066] The inner diameter of the upper section of the grouting gun head master disc 6-3 is consistent with the small outer diameter of the front end of the support sleeve 4. The small outer diameter section of the front end of the support sleeve 4 is coaxially sleeved on the upper section of the grouting gun head master disc 6-3 to fix the front end of the support sleeve 4.

[0067] The sleeve valve tube 1 comprises a sleeve valve tube body 1-1, on which a plurality of sleeve valve tube overflow hole areas are arranged at intervals, and a plurality of sleeve valve tube overflow hole areas are provided with a plurality of sleeve valve tube overflow holes 1-3; a plurality of sleeve valve tube rubber sleeves 1-2 are provided on the sleeve valve tube body 1-1, and each sleeve valve tube rubber sleeve 1-2 is sleeved and covers the sleeve valve tube overflow hole area; the sleeve valve tube rubber sleeve 1-2 is used to ensure that the slurry flows out of the sleeve valve tube body 1-1 in one direction under the action of pressure, and the slurry is pushed open from the sleeve valve tube body 1-1 through the sleeve valve tube overflow hole 1-3 and injected into the formation. The sleeve valve tube body 1-1 is made of PVC hard plastic material, and the distance between two adjacent sleeve valve tube overflow hole areas is half a meter.

[0068] The present invention also discloses a grouting method of the above-mentioned rapid segmented retreat grouting device, the grouting method, as Figure 6 As shown, the following steps are included:

[0069] Step S1, drilling a hole on the ground surface to a designed depth; inserting a sleeve valve pipe 1 into the hole, with the upper end of the sleeve valve pipe 1 located on the ground surface; using a casing material 7 to seal the gap between the hole wall and the sleeve valve pipe 1 and the part near the hole opening to prevent the slurry from flowing to the ground surface. The casing material 7 is a cementitious material composed of cement, bentonite, admixtures, etc.

[0070] Step S2: Coaxially sleeve the anti-counterfeiting lock head connecting sleeve 5-1 on the end of the sleeve valve tube 1 on the ground surface and fix it.

[0071] Step S3, the front end of the grouting hose 2 is connected to the grouting gun head grouting pipe 6-2, and is coaxially sleeved in the connected grouting gun head rubber plug 6-1 and the grouting gun head mother plate 6-3; the grouting hose 2 and the grouting gun head 6 are connected to form a grouting pipeline;

[0072] And complete the installation of the front support sleeve 4;

[0073] At the upper end of the installed front section cylindrical shell, each section of the supporting sleeve 4 is coaxially installed in sequence, and the anti-capping lock 5 and the sleeve valve tube 1 are continuously coaxially inserted downward until the grouting gun head slurry pipe 6-2 is inserted into the bottom of the sleeve valve tube 1.

[0074] The process of step S3 is as follows: wrap the grouting hose 2 with the support sleeve mother piece 4-2, and insert the front tip into the upper section of the grouting gun head mother disk 6-3, then align the support sleeve male piece 4-1 with the support sleeve mother piece 4-2 to wrap the grouting hose 2, and at the same time slide the support sleeve male piece 4-1 along the axis to insert the front end into the upper section of the grouting gun head mother disk 6-3, and the holding piece is held in the groove of the support sleeve mother piece 4-2, and the support sleeve male piece 4-1 and the support sleeve mother piece 4-2 form a cylindrical shell; embed the support sleeve error limiting ring 4-3 into the concave limiting groove.

[0075] Step S4, rotate the two anti-counterfeiting lock bite covers 5-3 relative to each other, and fit their upper ends with the concave limit grooves at the upper end of the support sleeve 4, insert the anti-counterfeiting lock key 5-4, and temporarily fix the grouting pipeline.

[0076] Step S5, start grouting, the slurry is injected into the sleeve valve tube 1 through the pipeline, through the sleeve valve tube overflow hole 1-3, pushes open the sleeve valve tube rubber sleeve 1-2, and is injected into the formation; after reaching the designed grouting pressure and the designed grouting volume, the grouting of this section is completed; the slurry is injected into the sleeve valve tube 1 through the pipeline, and is blocked by the grouting gun head rubber plug 6-1, and no overflow occurs.

[0077] Step S6, pull out the grouting pipeline upwards, and when it is pulled to the next designed grouting section height, remove the uppermost support sleeve 4, remove the support sleeve error limiting ring 4-3, and then slide upward along the axial direction of the support sleeve 4 to pull out the support sleeve male piece 4-1, unhook it from the support sleeve female piece 4-2, so that its tip and upper end are released at the same time, and then pull out the support sleeve female piece 4-2 to complete the removal of this section of the support sleeve; and fix the anti-fleeting lock 5 again.

[0078] Step S7, repeat the grouting in step S5 to complete the grouting of this section.

[0079] Step S8, repeat steps S6-S7 until all grouting of each section of the current borehole is completed. Shut down the grouting machine, pull out the grouting gun head 6, and use the grouting machine to directly pressurize water to flush the grouting hose 2 and the grouting gun head 6. The support sleeve 4 does not need to be cleaned. Repeat steps S1-S6 to complete the grouting work of the next borehole.

Claims

1. A fast segmented retreat grouting device, characterized in that: It comprises a grouting hose (2) and a plurality of sections of a supporting sleeve (4), wherein the plurality of sections of the supporting sleeve (4) are detachably connected in sequence in the axial direction; the rear end of each of the supporting sleeves (4) has a section with a large inner diameter, and the front end has a section with a small outer diameter; Each of the support sleeves (4) comprises a support sleeve male piece (4-1) and a support sleeve female piece (4-2), and the support sleeve male piece (4-1) and the support sleeve female piece (4-2) are both semi-cylindrical shells, and the two enclose a cylindrical shell; The front end of the grouting hose (2) is used to be connected to the grouting gun head (6) to form a grouting pipeline; The support sleeve (4) is used to wrap the grouting hose (2), and carry the grouting hose (2) and the grouting gun head (6) to be coaxially inserted forward into the bottom of the sleeve valve tube (1); and after completing the grouting of this section, the support sleeve (4) and the grouting pipeline are pulled out upward until the height of the next designed grouting section is reached, and the male piece (4-1) of the support sleeve at the rear end is pulled out along the axial direction of the support sleeve (4), and then the female piece (4-2) of the support sleeve is pulled out to complete the removal of this section of the support sleeve (4); the support sleeve (4) and the grouting pipeline are pulled out upward in sequence, and the support sleeve (4) at the rear end is disassembled until all grouting of each section of the borehole is completed.

2. A rapid segmented retreat grouting device as claimed in claim 1, characterized in that: The upper end of the supporting sleeve mother sheet (4-2) and the two edge ends are stepped to form a groove which is higher near the edge and lower inside; Both side edges of the upper end of the supporting sleeve male piece (4-1) are provided with protruding thin pieces extending toward the supporting sleeve female piece (4-2); a downward holding piece is integrally connected to the lower edge of the end of the protruding thin piece; an upwardly concave groove is formed between the holding piece and the edge of the supporting sleeve male piece (4-1); when the supporting sleeve male piece (4-1) and the supporting sleeve female piece (4-2) are enclosed into a cylindrical shell, the holding piece is used to be held in the groove of the supporting sleeve female piece (4-2).

3. A rapid segmented retreat grouting device as claimed in claim 2, characterized in that: The outer walls of the upper ends of the supporting sleeve male piece (4-1) and the supporting sleeve female piece (4-2) are both provided with concave limiting grooves in a semicircular manner; a supporting sleeve misalignment limiting ring (4-3) is coaxially sleeved in the concave limiting groove, and the supporting sleeve misalignment limiting ring (4-3) is formed by enclosing two half rings and is used to fix the supporting sleeve male piece (4-1) and the supporting sleeve female piece (4-2).

4. A rapid segmented retreat grouting device as claimed in claim 3, characterized in that: It also includes an anti-counterfeit lock (5), wherein the anti-counterfeit lock (5) includes an anti-counterfeit lock connecting sleeve (5-1) and an anti-counterfeit lock bite cover (5-3); The anti-counterfeiting lock head connecting sleeve (5-1) is cylindrical, the lower end of which is coaxially sleeved on the top of the sleeve valve tube (1), and the upper end of which is coaxially connected to the anti-counterfeiting lock head base (5-2), the outer contour of the anti-counterfeiting lock head base (5-2) is a rectangular parallelepiped, with a cylindrical hole in the middle, which is connected to the anti-counterfeiting lock head connecting sleeve (5-1); The anti-counterfeiting lock bite cover (5-3) is formed by enclosing two semi-rectangular shells, each semi-rectangular shell is provided with a top cover on its upper part, each top cover is provided with a semi-circular opening, and the semi-circular opening end passes through the top cover and faces the semi-rectangular shell on the opposite side; the two semi-circular openings enclose a circular opening; The lower end of each semi-rectangular shell is open, and the front and rear side plates of each semi-rectangular shell are integrally connected with a triangular plate with a tip facing downward, and the tip of each triangular plate is hingedly connected to the front and rear side walls of the anti-counterfeiting lock base (5-2), and the two semi-rectangular shells can be rotated relative to each other or back to back to achieve the enclosure or opening of the two; when the two semi-rectangular shells are enclosed, a circular hole is formed in the middle, which fits and matches the concave limit groove at the upper end of the support sleeve (4) to achieve temporary fixation.

5. A rapid segmented retreat grouting device as claimed in claim 4, characterized in that: The anti-counterfeit lock connecting sleeve (5-1) is provided with an anti-counterfeit lock key (5-4), and there are two anti-counterfeit lock keys (5-4), both of which are door-shaped metal objects. The left and right ends of the lower end of each door-shaped metal object are respectively provided with vertically downward cylindrical pins, and the cylindrical pins are used to be inserted into the vertical openings on the upper wall of the anti-counterfeit lock bite cover (5-3) to fix the two left and right semi-rectangular parallelepiped shells.

6. A rapid segmented retreat grouting device as claimed in claim 5, characterized in that: The grouting gun head (6) comprises a grouting gun head rubber plug (6-1), a grouting gun head grouting pipe (6-2) and a grouting gun head master plate (6-3), wherein: The grouting gun head rubber plug (6-1) is a cylindrical rubber piston, which is provided with a through hole in the vertical axial direction, and whose outer diameter matches the inner diameter of the sleeve valve tube (1). It is coaxially sleeved in the sleeve valve tube (1) and is used to prevent the slurry from flowing back to the ground along the sleeve valve tube (1); The grouting gun head master plate (6-3) is a cylindrical tube, the outer diameter of which is consistent with the outer diameter of the grouting gun head rubber plug (6-1), and the inner wall of which is stepped, and the inner diameter of the upper section of the cylindrical tube is larger than the inner diameter of the lower section; the front end of the cylindrical tube is coaxially connected to the rear end of the grouting gun head rubber plug (6-1), and is coaxially sleeved in the sleeve valve tube (1); The grouting gun head grouting pipe (6-2) is a metal pipe, the upper end of which is connected to the front end of the grouting hose (2); The grouting gun head grouting pipe (6-2) and the grouting hose (2) coaxially pass through the grouting gun head rubber plug (6-1) and the grouting gun head mother plate (6-3), and the grouting gun head grouting pipe (6-2) passes through the grouting gun head rubber plug (6-1) forward.

7. A rapid segmented retreat grouting device as claimed in claim 6, characterized in that: The inner diameter of the upper section of the grouting gun head master disc (6-3) is consistent with the small outer diameter of the front end of the support sleeve (4), and the small outer diameter section of the front end of the support sleeve (4) is coaxially sleeved on the upper section of the grouting gun head master disc (6-3) to fix the front end of the support sleeve (4).

8. A rapid segmented retreat grouting device as claimed in claim 7, characterized in that: The sleeve valve tube (1) comprises a sleeve valve tube body (1-1), on which a plurality of sleeve valve tube overflow hole areas are arranged at intervals, and each of the sleeve valve tube overflow hole areas is provided with a plurality of sleeve valve tube overflow holes (1-3); a plurality of sleeve valve tube rubber sleeves (1-2) are sleeved on the sleeve valve tube body (1-1), and each sleeve valve tube rubber sleeve (1-2) is sleeved on and covers the sleeve valve tube overflow hole area; the sleeve valve tube rubber sleeve (1-2) is used to ensure that the slurry flows out of the sleeve valve tube body (1-1) in a unidirectional manner under the action of pressure, and the slurry is injected into the formation from the sleeve valve tube body (1-1) through the sleeve valve tube overflow hole (1-3) to push open the sleeve valve tube rubber sleeve (1-2).

9. A grouting method for a fast segmented retreat grouting device according to any one of claims 1 to 8, characterized in that: The grouting method comprises the following steps: Step S1, drilling a hole on the ground surface to a designed depth; inserting a sleeve valve tube (1) into the hole, with the upper end of the sleeve valve tube (1) being located above the ground surface; Step S2, coaxially sleeve the anti-counterfeiting lock head connecting sleeve (5-1) on the end of the sleeve valve tube (1) on the ground surface, and fix it; Step S3, connecting the front end of the grouting hose (2) to the grouting gun head grouting pipe (6-2), and coaxially sleeved in the connected grouting gun head rubber plug (6-1) and the grouting gun head mother plate (6-3); the grouting hose (2) and the grouting gun head (6) are connected to form a grouting pipeline; and completing the installation of the support sleeve (4) described in the previous paragraph; At the upper end of the installed front cylindrical shell, coaxially install the supporting sleeves (4) of each section in sequence, and continuously coaxially insert the anti-fleeting lock (5) and the sleeve valve tube (1) downward until the grouting gun head grouting tube (6-2) is inserted into the bottom of the sleeve valve tube (1); Step S4, the two anti-counterfeiting lock bite covers (5-3) are rotated relative to each other to fit together, and the upper ends thereof are fitted and matched with the concave limiting grooves at the upper end of the supporting sleeve (4), and the anti-counterfeiting lock key (5-4) is inserted to temporarily fix the grouting pipeline; Step S5, start grouting, the slurry is injected into the sleeve valve pipe (1) through the pipeline, through the sleeve valve pipe overflow hole 1-3, pushes open the sleeve valve pipe rubber sleeve 1-2, and is injected into the formation; after reaching the designed grouting pressure and the designed grouting volume, the grouting of this section is completed. Step S6, pull out the grouting pipeline upwards, and when it is pulled to the height of the next designed grouting section, remove the uppermost support sleeve (4), remove the support sleeve error limiting ring (4-3), and then slide the support sleeve male piece (4-1) upwards along the axial direction of the support sleeve (4) to disengage it from the support sleeve female piece (4-2), so that its tip and upper end are released at the same time, and then pull out the support sleeve female piece (4-2), and complete the removal of this section of the support sleeve; and fix the anti-fleeting lock (5) again; Step S7, repeat the grouting in step S5 to complete the grouting of this section; Step S8, repeat steps S6-S7 until all grouting of each section of the current borehole is completed.

10. A grouting method for a fast segmented retreat grouting device as claimed in claim 9, characterized in that: The process of step S3 is as follows: the support sleeve mother piece (4-2) is used to wrap the grouting hose (2), and the front tip is inserted into the upper section of the grouting gun head mother disc (6-3), and then the support sleeve male piece (4-1) is matched with the support sleeve mother piece (4-2) to wrap the grouting hose (2), and at the same time, the support sleeve male piece (4-1) is slid along the axis to insert the front end into the upper section of the grouting gun head mother disc (6-3), and the clamping piece is clamped in the groove of the support sleeve mother piece (4-2), and the support sleeve male piece (4-1) and the support sleeve mother piece (4-2) are surrounded by a cylindrical shell; the support sleeve error limiting ring (4-3) is embedded in the concave limiting groove.

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