CN113153326B - Shield synchronous grouting rapid hardening device and use method thereof - Google Patents
Shield synchronous grouting rapid hardening device and use method thereof Download PDFInfo
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- CN113153326B CN113153326B CN202110430273.XA CN202110430273A CN113153326B CN 113153326 B CN113153326 B CN 113153326B CN 202110430273 A CN202110430273 A CN 202110430273A CN 113153326 B CN113153326 B CN 113153326B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 54
- 239000002689 soil Substances 0.000 claims abstract description 32
- 238000005345 coagulation Methods 0.000 claims abstract description 19
- 230000015271 coagulation Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 75
- 230000003204 osmotic effect Effects 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000009833 condensation Methods 0.000 claims description 12
- 230000005494 condensation Effects 0.000 claims description 12
- 230000035515 penetration Effects 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 5
- 230000009466 transformation Effects 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000002775 capsule Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a synchronous grouting rapid hardening device for a shield and a use method thereof, and relates to the technical field of shield construction; in order to solve the problem of higher cost of the reconstruction equipment; the method comprises the following steps: assembling a shield synchronous grouting rapid hardening device; pre-judging a shield tunnel section which needs to accelerate the coagulation of synchronous grouting slurry; after the pipe piece is assembled into a ring, opening holes with the diameter of 38mm are formed in the sealing blocks at the top of the pipe ring and the adjacent blocks at two sides of the sealing blocks, which are close to one end of the hoisting hole; installing shield synchronous grouting quick setting devices in the hoisting holes of the three segments, and closing the ball valves; the shield pushing jack pushes the segment provided with the shield synchronous grouting rapid hardening device, and synchronous grouting filling segment and soil layer gaps are carried out at the shield tail; and when the pipe piece of the shield synchronous grouting rapid hardening device to be installed is separated from the shield tail, a pipe ring width is arranged at a distance from the shield tail, namely, when the pipe piece is separated from the second ring of the shield tail. The invention has convenient installation and disassembly, does not need to carry out equipment transformation on the synchronous grouting pipeline and the shield tail of the shield machine, and saves the cost.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a shield synchronous grouting rapid hardening device and a using method thereof.
Background
In the process of constructing a tunnel by a shield method, after the shield machine excavates and tunnels, a certain gap exists between the segment and the stratum and between the segment and the shield tail shell, so that the deformation of the stratum is controlled, the sedimentation is reduced, the permeability resistance of the tunnel and the early stability of the segment lining are improved, the circumferential gap behind the segment wall is required to be filled with slurry in a synchronous grouting mode, and if the gap is not backfilled in time, the stratum is changed, and the stability of a nearby building is affected. Generally, synchronous grouting is divided into single-liquid grouting and double-liquid grouting, when the single-liquid grouting is adopted, the coagulation time is long, 4-6 hours are needed, formation deformation cannot be restrained in time, further deformation of a ground building structure is limited, the single-liquid grouting is easily diluted by underground water, material separation is generated, a segment floating phenomenon is generated, when the double-liquid grouting is adopted, if the double-liquid grouting is mixed before a shield tail grouting pipeline, grouting is carried out through the grouting pipeline, pipe blockage is easy to occur, pipeline cleaning is time-consuming and labor-consuming, and the construction efficiency is low.
Through retrieval, the patent with the Chinese patent application number of CN201921627545.X discloses an instant quick-setting type synchronous grouting system of a shield tunnel and an accelerator capsule, which comprises an accelerator capsule, a synchronous grouting pipeline of a shield machine and an additive grouting pipeline, wherein the accelerator capsule is formed by encapsulating the accelerator by a water-soluble encapsulating material, and the additive grouting pipeline is communicated with the synchronous grouting pipeline. The shield tunnel instant quick-setting type synchronous grouting system and the accelerator capsule in the patent have the following defects: the synchronous grouting pipeline system is required to be modified, and the valve group is connected with the tail end of the synchronous grouting pipeline to inject the accelerator into the pipeline, so that the equipment modification cost is increased, and the cost is increased.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a synchronous grouting rapid hardening device for a shield and a use method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The application method of the shield synchronous grouting rapid hardening device comprises the following steps:
S1: assembling a shield synchronous grouting rapid hardening device;
S2: pre-judging a shield tunnel section which needs to accelerate the coagulation of synchronous grouting slurry;
S3: after the pipe piece is assembled into a ring, opening holes with the diameter of 38mm are formed in the sealing blocks at the top of the pipe ring and the adjacent blocks at two sides of the sealing blocks, which are close to one end of the hoisting hole;
S4: installing shield synchronous grouting quick setting devices in the hoisting holes of the three segments, and closing the ball valves;
S5: the shield pushing jack pushes the segment provided with the shield synchronous grouting rapid hardening device, and synchronous grouting filling segment and soil layer gaps are carried out at the shield tail;
S6: when the pipe piece of the shield synchronous grouting rapid hardening device is separated from the shield tail, and a pipe ring width is arranged at a distance from the shield tail, namely, when the pipe piece is separated from a second ring of the shield tail, a ball valve is used for connecting an external accelerator injection pipeline, and then the ball valve is opened for injecting accelerator;
s7: when the injection pressure of the accelerator is greater than the resultant force of the soil and water outside the duct piece and the slurry, the penetration damping film is stressed to extend outwards the duct piece, the accelerator is continuously injected, the injection pressure is kept to be slightly greater than the resultant force of the soil and water outside the duct piece and the slurry by 0.01Mpa, and the accelerator starts to penetrate the penetration damping film and reacts with the synchronous grouting slurry;
S8: calculating and controlling the injection quantity and the expansion range of the accelerator according to the reaction time of the accelerator and the synchronous grouting slurry, the grouting pressure and the permeability of the permeable damping film;
S9: after the slurry with certain strength is coagulated and formed, closing the ball valve, and waiting for 30 minutes to coagulate the slurry;
s10: plugging the hoisting hole by using cement, and installing a check valve;
the shield synchronous grouting rapid hardening device comprises a grouting rapid hardening structure main body and more than two pipe rings arranged on the inner wall of the shield machine body, wherein the more than two pipe rings comprise more than two pipe pieces, hoisting holes are formed in the inner wall of one side of the more than two pipe pieces, and threaded pipes are arranged on the inner walls of the more than two hoisting holes; the grouting rapid hardening structure main body comprises a ball valve, external threads, a grouting head, a waterproof sleeve and a penetration damping film, wherein the circumferential inner wall of the external threads is fixedly connected to the circumferential outer wall of the grouting head, and a threaded pipe is matched with the external threads.
Preferably: the grouting head is made of a No. 45 steel material, and is integrally a linear cylinder; one end fixedly connected with feed end of slip casting head, the circumference outer wall of feed end is provided with the pipe tooth.
Preferably: the circumference inner wall of slip casting head is provided with the through-hole, and the circumference outer wall of slip casting head is provided with the draw-in groove.
Preferably: the inner wall of waterproof cover sets up in the inner wall of draw-in groove through the fixture block, and the circumference outer wall of fixture block sets up in the circumference outer wall of waterproof cover, and waterproof cover adopts water swelling rubber to make, and waterproof cover is the ring type.
Preferably: the other end fixedly connected with discharge end of slip casting head, the circumference outer wall of discharge end is provided with two spread grooves, and the bottom inner wall and the top inner wall of two spread grooves all are provided with T type groove, and the opposite one side inner wall of two spread grooves all is provided with three elastic component.
Preferably: one end of the osmotic damping membrane is provided with a port, the circumferential outer wall of the port is provided with a sleeve, the circumferential inner wall of the sleeve is provided with two connecting blocks, and the connecting blocks are matched with the connecting grooves.
Preferably: two the outer wall of one side of connecting block all is provided with three connecting hole, and the connecting hole internal diameter equals with elastic component's diameter, and the bottom outer wall and the top outer wall of two connecting blocks all are provided with T type rubber piece.
Preferably: the outer wall of the penetration damping film is provided with more than two elastic columns, the circumferential inner walls of the more than two elastic columns are all rotationally connected with brush body components, and the brush body components comprise elastic ropes and elastic nylon brush wires.
Preferably: the waiting for 30 minutes causes the slurry to coagulate, the specific operations comprising the steps of:
s51: opening the ball valve to check whether the liquid flows out;
s52: if the running water phenomenon exists, closing the ball valve to wait for slurry coagulation;
s53: and (3) rotating the grouting head after condensation, separating the permeable damping film from the lifting hole, and pulling out the grouting head.
The beneficial effects of the invention are as follows:
1. According to the invention, the three grouting rapid hardening structure main bodies are fixed in the three lifting holes on the second ring segment of the shield machine body separated from the shield tail through the matching of the threaded pipe and the external threads, the feeding end of the grouting head is exposed out of the segment, the installation and the disassembly are convenient, the equipment transformation of the synchronous grouting pipeline and the shield tail of the shield machine is not required, and the cost is saved.
2. When the waterproof pipe is installed, the ball valve is connected and fixed with the feeding end of the grouting head through the pipe teeth, the contracted osmotic damping film bag body is plugged into the through hole from one end of the grouting head after the osmotic damping film is fixed on the grouting head, the outer surface of the waterproof sleeve is contacted with the inner wall of the lifting hole on the pipe piece, the clamping block is arranged in the clamping groove on the grouting head, the waterproof sleeve is prevented from falling off from the grouting head, and the waterproof pipe is reliable in structure.
3. After the accelerator is injected into the grouting head, the injected accelerator is slowly pushed out by the force of the penetration damping film after entering the through hole, and is stretched into synchronous slurry between the pipe piece and the soil layer, the clearance between the pipe piece and the soil layer is filled, the accelerator is wrapped in the penetration damping film, the expansion rate of the accelerator is controlled, the final expansion range of the accelerator is further controlled, the accelerator and the synchronous grouting slurry react in a designated range, the condensation time of the synchronous grouting slurry is locally regulated, a condensation block with certain strength is formed, the condensation block is at least one pipe ring distance away from the shield tail brush, the generated condensation block blocks the slurry at the rear from flowing to the shield body, the shield body is prevented from being condensed and wrapped, the shield body is difficult to advance, and the thrust torque is abnormally increased.
4. When the accelerator is injected, the osmotic damping film bag body is turned over from the grouting head and slowly pushed out, and at the moment, the brush body assembly is positioned on the inner wall of the osmotic damping film bag body, so that when the osmotic damping film bag body permeates water fluid such as the accelerator and prevents cement, sand, soil and other particles from passing through, the brush body assembly in the osmotic damping film bag body continuously contacts with the filtered cement, sand, soil and other particles on the inner wall of the bag body by taking the elastic column as a connecting point, the blockage of the impurities caused by the coagulation of the impurities in the osmotic damping film bag body is effectively avoided, the outflow efficiency of the water fluid such as the accelerator is influenced, the formed coagulation blocks can support the soil layer above a pipe piece, the settlement deformation of the stratum is controlled, the buoyancy of slurry is inhibited, the deformation of a tunnel structure is controlled, and the overrun of the tunnel axis deviation is avoided.
5. According to the invention, after the contracted osmotic damping film bag body is plugged into the through hole from one end of the grouting head, the port of the osmotic damping film is reserved, then the sleeve is manually controlled to be sleeved on the outer wall of the discharge end on the grouting head and pushed inwards, so that the two connecting blocks are respectively clamped into the corresponding two connecting grooves, when the two connecting blocks are clamped, the two connecting blocks apply force to the middle at the same time, the elastic components on the two sides are extruded to compress towards the two sides, after the T-shaped rubber block is inserted into the corresponding T-shaped groove, the elastic components on the two sides are inserted into the same group of connecting holes on the corresponding position, and further the connection and the fixation of the osmotic damping film and the grouting head are completed, so that the osmotic damping film bag body is prevented from falling off from the grouting head during synchronous grouting.
Drawings
FIG. 1 is a schematic diagram of the whole structure of a shield synchronous grouting rapid hardening device;
fig. 2 is a schematic diagram of a front-view explosion structure of a grouting rapid hardening structure main body of a shield synchronous grouting rapid hardening device;
Fig. 3 is a schematic diagram of a grouting rapid hardening structure main body and a waterproof sleeve explosion structure of the shield synchronous grouting rapid hardening device;
FIG. 4 is a schematic diagram of a structure of a permeable damping film of a shield synchronous grouting rapid hardening device according to the present invention;
FIG. 5 is a schematic diagram of a partial structure of a permeable damping film of a shield synchronous grouting rapid hardening device according to the present invention;
FIG. 6 is a schematic structural view of a shield synchronous grouting quick setting device according to the present invention in a use state of a permeable damping film;
fig. 7 is an enlarged schematic diagram of a portion a of a shield synchronous grouting rapid hardening device according to the present invention;
fig. 8 is a schematic view of a segment assembly ring structure according to the present invention;
fig. 9 is a schematic top view of a segment according to the present invention;
FIG. 10 is a schematic side view of a segment according to the present invention;
FIG. 11 is a schematic diagram of the installation state structure of a shield synchronous grouting rapid hardening device;
FIG. 12 is a schematic diagram of the working state structure of a shield synchronous grouting rapid hardening device according to the present invention;
Fig. 13 is a schematic diagram showing a block-state structure of the synchronous grouting slurry according to the present invention.
In the figure: 1 grouting quick-setting structure main body, 2 ball valves, 3 external threads, 4 grouting heads, 5 waterproof sleeves, 6 pipe teeth, 7 through holes, 8 feeding ends, 9 limiting blocks, 10 clamping blocks, 11 connecting grooves, 12T-shaped grooves, 13 discharging ends, 14 elastic components, 15 permeable damping films, 16 sleeves, 17 connecting holes, 18 connecting blocks, 19T-shaped rubber blocks, 20 ports, 21 elastic columns, 22 brush body components, 23 pipe pieces, 24 lifting holes, 25 holes, 26 threaded pipes, 27 shield machine main bodies, 28 synchronous grouting slurry, 29 soil layers, 30 agglomerations and 31 clamping grooves.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
Example 1:
1-4, 6 and 8-13, the shield synchronous grouting rapid hardening device comprises a grouting rapid hardening structure main body 1, more than two pipe rings, synchronous grouting slurry 28, soil layers 29 and a condensate block 30, wherein the pipe rings are arranged on the inner wall of a shield machine main body 27, the pipe rings comprise more than two pipe pieces 23, lifting holes 24 are formed in the inner wall of one side of each pipe piece 23, threaded pipes 26 are fixed on the inner wall of each lifting hole 24 through bolts, three open holes 25 are formed in the outer wall of the circumference of one pipe ring, close to the top end, of each lifting hole 24, and the diameters of the open holes 25 are 38mm; The grouting rapid hardening structure main body 1 comprises a ball valve 2, an external thread 3, a grouting head 4, a waterproof sleeve 5 and a penetration damping film 15, wherein the circumferential inner wall of the external thread 3 is fixedly connected with the circumferential outer wall of the grouting head 4, and a threaded pipe 26 is matched with the external thread 3; the grouting head 4 is made of a No. 45 steel material, and the whole grouting head 4 is a straight cylinder; one end of the grouting head 4 is fixedly connected with a feeding end 8, and a pipe tooth 6 is arranged on the circumferential outer wall of the feeding end 8; the circumference inner wall of the grouting head 4 is provided with a through hole 7, and the diameter of the through hole 7 is 28mm; the circumference outer wall of the grouting head 4 is provided with a clamping groove 31, the inner wall of the waterproof sleeve 5 is sleeved on the inner wall of the clamping groove 31 through a clamping block 10, and the circumference outer wall of the clamping block 10 is fixed on the circumference outer wall of the waterproof sleeve 5 through bolts; the waterproof sleeve 5 is made of water-swelling rubber, and the waterproof sleeve 5 is in a circular ring shape; during installation, the ball valve 2 is connected and fixed with the feed end 8 of the grouting head 4 through the pipe teeth 6, after the osmotic damping film 15 is fixed on the grouting head 4, the contracted osmotic damping film 15 bag body is inserted into the through hole 7 from one end of the grouting head 4, the outer surface of the waterproof sleeve 5 is contacted with the inner wall of the lifting hole 24 on the pipe piece 23, the clamping block 10 is arranged in the clamping groove 31 on the grouting head 4 to play a role in preventing the waterproof sleeve 5 from falling off from the grouting head 4, then the three grouting rapid hardening structural bodies 1 are fixed in the three lifting holes 24 on the second ring pipe piece of the shield machine body 27 separated from the shield tail through the matching of the threaded pipe 26 and the external threads 3, The feeding end 8 of the grouting head 4 is exposed out of the pipe piece 23, the installation and the disassembly are convenient, the equipment reconstruction of a synchronous grouting pipeline and a shield tail of a shield machine is not needed, the cost is saved, when the grouting head is used, the other end of the ball valve 2 is connected with an external accelerator injection pipeline, after the accelerator is injected into the grouting head 4, the injected accelerator enters the through hole 7 to slowly push out the permeable damping film 15 under the stress, as shown in fig. 6 and 12, the accelerator is stretched into synchronous slurry between the pipe piece 23 and the soil layer 29, the clearance between the pipe piece 23 and the soil layer 29 is filled, the accelerator is wrapped in the permeable damping film 15, the expansion rate of the accelerator is controlled, and the final expansion range of the accelerator is controlled, The slurry is made to react with the synchronous grouting slurry 28 in a designated range, the coagulation time of the synchronous grouting slurry 28 is locally regulated to form a coagulation block 30 with certain strength, as shown in figure 13, the coagulation block 30 is at least one pipe ring distance away from the shield tail brush, the generated coagulation block 30 blocks the flow of the rear slurry to the shield body, the slurry is prevented from coagulating and wrapping up the shield body, the shield body is difficult to advance, the thrust torque is abnormally increased, meanwhile, the coagulation block 30 can support the soil layer 29 above the pipe piece 23, the sedimentation deformation of the stratum is controlled, the buoyancy of the slurry is restrained, the deformation of a tunnel structure is controlled, the overrun of the tunnel axis is avoided, the permeation damping film 15 plays roles in effectively permeating water fluid such as an accelerator and the like to flow out, And prevent the effect that granule such as cement, grit, soil body passed through, easy operation, the efficiency of construction is high.
In order to fix the connection of the osmotic damping membrane 15 to the grouting head 4; as shown in fig. 3, 5 and 6, the other end of the grouting head 4 is fixedly connected with a discharge end 13, two connecting grooves 11 are formed in the circumferential outer wall of the discharge end 13, T-shaped grooves 12 are formed in the bottom inner walls and the top inner walls of the two connecting grooves 11, three elastic components 14 are fixed on the inner walls of opposite sides of the two connecting grooves 11 through bolts, a port 20 is formed in one end of the permeable damping film 15, a sleeve 16 is welded on the circumferential outer wall of the port 20, two connecting blocks 18 are fixed on the circumferential inner wall of the sleeve 16 through bolts, the connecting blocks 18 are matched with the connecting grooves 11, three connecting holes 17 are formed in the outer walls of one side of the two connecting blocks 18, the inner diameters of the connecting holes 17 are equal to the diameters of the elastic components 14, and a T-shaped rubber block 19 is fixed on the outer walls of the bottom and the top of the two connecting blocks 18 through bolts during installation, after the contracted bag body of the osmotic damping film 15 is plugged into the through hole 7 from one end of the grouting head 4, a port 20 of the osmotic damping film 15 is reserved, then the sleeve 16 is manually controlled to be sleeved on the outer wall of the discharge end 13 on the grouting head 4 and pushed inwards, so that two connecting blocks 18 are respectively clamped into the corresponding two connecting grooves 11, when the two connecting blocks 18 are clamped, force is applied to the middle at the same time, the elastic components 14 on two sides are compressed to two sides, after the T-shaped rubber blocks 19 are inserted into the corresponding T-shaped grooves 12, the elastic components 14 on two sides are inserted into the same group of connecting holes 17 at the corresponding positions at the moment, the connection and fixation of the osmotic damping film 15 and the grouting head 4 are further completed, after the grouting rapid hardening structural main body 1 is installed, a 50mm gap is reserved between the tail end of the discharge end 13 and the outer side of a segment 23, and the inner surface of the waterproof sleeve 5 is attached to the outer surface of the discharge end 13.
In the embodiment, when the ball valve 2 is installed, the ball valve is connected and fixed with the feeding end 8 of the grouting head 4 through the pipe teeth 6, after the osmotic damping film 15 is fixed on the grouting head 4, the contracted osmotic damping film 15 bag body is plugged into the through hole 7 from the discharging end 13 of the grouting head 4, the port 20 of the osmotic damping film 15 is reserved, then the sleeve 16 is manually operated to be sleeved on the outer wall of the discharging end 13 on the grouting head 4 and pushed inwards, so that the two connecting blocks 18 are respectively clamped into the corresponding two connecting grooves 11, when the two connecting blocks 18 are clamped, the two connecting blocks 18 apply force to the middle at the same time, the elastic assemblies 14 at the two sides are extruded to compress to the two sides, after the T-shaped rubber block 19 is inserted into the corresponding T-shaped groove 12, the elastic assemblies 14 at the two sides are inserted into the same group of connecting holes 17 at the corresponding positions at the moment, and then the connection and fixation of the osmotic damping film 15 and the grouting head 4 are completed, the outer surface of the waterproof jacket 5 contacts with the inner wall of the lifting hole 24 on the pipe piece 23, the inner surface of the waterproof jacket 5 is attached to the outer surface of the discharge end 13, the clamping block 10 is arranged in the clamping groove 31 on the grouting head 4 to play a role in preventing the waterproof jacket 5 from falling off the grouting head 4, then the three grouting rapid hardening structure main bodies 1 are fixed in the three lifting holes 24 on the second ring pipe piece of the shield machine body 27 separated from the shield tail through the matching of the threaded pipe 26 and the external threads 3, after the installation is finished, the feed end 8 of the grouting head 4 is exposed outside the pipe piece 23, a gap of 50mm is reserved between the tail end of the discharge end 13 and the outer side of the pipe piece 23, when the grouting rapid hardening structure is used, the other end of the ball valve 2 is connected with an external accelerator injection pipeline, after the accelerator is injected into the grouting head 4, the injected accelerator enters the through hole 7 from the feed end 8 to enable the penetration damping film 15 to be slowly pushed out from the discharge end 13, as shown in figures 6 and 12, the concrete blocks 30 are stretched into the synchronous slurry between the duct piece 23 and the soil layer 29, gaps between the duct piece 23 and the soil layer 29 are filled, the accelerating agent is wrapped in the penetration damping film 15, the spreading rate of the accelerating agent is controlled to further control the final spreading range of the accelerating agent, the accelerating agent is made to react with the synchronous grouting slurry 28 in a specified range, the condensation time of the synchronous grouting slurry 28 is locally regulated to form a condensate block 30 with certain strength, as shown in fig. 13, the condensate block 30 is at least one pipe ring distance away from the shield tail brush, the generated condensate block 30 blocks the flow of the slurry at the rear to the shield body, the shield body is prevented from being condensed and wrapped up, the shield body is difficult to advance, the thrust torque is abnormally increased, meanwhile, the condensate block 30 can support the soil layer 29 above the duct piece 23, the formation sedimentation deformation is controlled, the buoyancy is inhibited, the tunnel structure deformation is controlled, the tunnel axis deviation overrun is avoided, the penetration damping film 15 plays the roles of effectively penetrating the water fluid such as the accelerating agent, the cement, the soil body and the like are prevented from passing through, and the concrete block 30 has certain strength, the construction pressure can bear 0.5Mpa, the operation is simple, the operation is efficient, and the efficiency is high.
Example 2:
In order to further avoid clogging during filtration of the osmotic damping membrane 15, the shield synchronous grouting rapid hardening device of embodiment 1 is modified as shown in fig. 4 to 7 by the following modifications based on embodiment 1: the outer wall of the osmotic damping film 15 is welded with more than two elastic columns 21, the circumferential inner walls of the more than two elastic columns 21 are all rotationally connected with brush body assemblies 22, each brush body assembly 22 comprises an elastic rope and elastic nylon brush wires, when the contracted osmotic damping film 15 bag body is plugged into the through hole 7 from one end of the grouting head 4, the brush body assemblies 22 are positioned on the outer wall of the osmotic damping film 15 bag body, the plugged state is shown in fig. 4, when an accelerating agent is injected, the osmotic damping film 15 bag body is stressed to be overturned from the grouting head 4 and slowly pushed out, at the moment, the brush body assemblies 22 are positioned on the inner wall of the osmotic damping film 15 bag body, so when water fluid such as the osmotic accelerating agent flows out, and particles such as cement, sand, gravel and soil body are prevented from passing through, the brush body assemblies 22 in the osmotic damping film 15 bag body are continuously contacted with the particles such as cement, sand and gravel filter soil body and the like in the bag body by taking the elastic columns 21 as connection points, the blocking of the osmotic damping film 15 bag body is effectively avoided, and the efficiency of the effect of the outflow of the accelerating agent is influenced.
In the embodiment, when the ball valve 2 is installed, the ball valve is connected and fixed with the feeding end 8 of the grouting head 4 through the pipe teeth 6, after the osmotic damping film 15 is fixed on the grouting head 4, the contracted osmotic damping film 15 bag body is plugged into the through hole 7 from the discharging end 13 of the grouting head 4, the brush body assembly 22 is positioned on the outer wall of the osmotic damping film 15 bag body, the plugged state is as shown in fig. 4, the port 20 of the osmotic damping film 15 is reserved, then the sleeve 16 is sleeved on the outer wall of the discharging end 13 on the grouting head 4 by manual operation and is pushed inwards, so that the two connecting blocks 18 are respectively clamped into the corresponding two connecting grooves 11, and when in clamping, the two connecting blocks 18 apply force to the middle at the same time, The elastic components 14 at two sides are extruded to compress towards two sides, after the T-shaped rubber blocks 19 are inserted into the corresponding T-shaped grooves 12, the elastic components 14 at two sides are inserted into the same group of connecting holes 17 at corresponding positions at the moment, so that the connection and fixation of the permeation damping film 15 and the grouting head 4 are finished, the outer surface of the waterproof sleeve 5 is contacted with the inner wall of the lifting hole 24 on the pipe piece 23, the inner surface of the waterproof sleeve 5 is attached to the outer surface of the discharge end 13, the clamping blocks 10 are arranged in the clamping grooves 31 on the grouting head 4 to play a role of preventing the waterproof sleeve 5 from falling off from the grouting head 4, then the three grouting rapid hardening structure main bodies 1 are fixed in the three lifting holes 24 on the second ring pipe piece of the shield machine body 27 separated from the tail through the matching of the threaded pipe 26 and the external threads 3, After the installation, the feeding end 8 of the grouting head 4 is exposed out of the duct piece 23, a gap of 50mm is reserved between the tail end of the discharging end 13 and the outer side of the duct piece 23, when the grouting head is used, the other end of the ball valve 2 is connected with an external accelerator injection pipeline, after the accelerator is injected into the grouting head 4, the injected accelerator enters the through hole 7 from the feeding end 8, the bag body of the permeable damping film 15 is stressed, overturned from the grouting head 4 and slowly pushed out from the discharging end 13, as shown in fig. 6 and 12, at the moment, the brush body assembly 22 is positioned on the inner wall of the bag body of the permeable damping film 15, so when the permeable damping film 15 is penetrated by water fluid such as the accelerator, cement is prevented from flowing out, When the particles such as sand and soil pass through, the brush body component 22 in the bag body of the osmotic damping film 15 continuously contacts with the particles such as cement, sand and soil filtered by the inner wall of the bag body by taking the elastic column 21 as a connecting point, thereby avoiding the blockage of the particles caused by the coagulation of impurities in the bag body of the osmotic damping film 15, the bag body of the osmotic damping film 15 stretches into synchronous slurry between the pipe piece 23 and the soil layer 29, filling the gap between the pipe piece 23 and the soil layer 29, wrapping the accelerating agent in the osmotic damping film 15, controlling the expansion rate of the accelerating agent and further controlling the final expansion range of the accelerating agent, causing the accelerating agent to react with the synchronous grouting slurry 28 in a specified range, locally adjusting the coagulation time of the synchronous grouting slurry 28, the condensation block 30 with certain strength is formed, as shown in fig. 13, the condensation block 30 is at least one pipe ring away from the shield tail brush, the generated condensation block 30 blocks the slurry at the rear from flowing to the shield body, the slurry is prevented from condensing and wrapping up the shield body, the shield body is difficult to advance, the thrust torque is abnormally increased, meanwhile, the condensation block 30 can support the soil layer 29 above the pipe piece 23, the formation settlement deformation is controlled, the slurry is restrained from generating buoyancy, the tunnel structure deformation is controlled, and the tunnel axis deviation overrun is avoided.
Example 3:
the application method of the shield synchronous grouting rapid hardening device, as shown in figures 1-13, comprises the following steps:
S1: assembling a shield synchronous grouting rapid hardening device;
S2: pre-judging a shield tunnel section which needs to accelerate the coagulation of synchronous grouting slurry;
S3: after the duct piece 23 is assembled into a ring, openings 25 with the diameter of 38mm are formed in the sealing blocks at the top of the pipe ring and two adjacent blocks at two sides of the sealing blocks, which are close to one end of the hoisting hole;
s4: installing a shield synchronous grouting quick setting device in the lifting holes 24 of the three segments 23, and closing the ball valve 2;
s5: the shield pushing jack pushes the segment 23 provided with the shield synchronous grouting rapid hardening device, and synchronous grouting filling segment 23 and soil layer 29 gaps are carried out at the shield tail;
s6: when the segment 23 of the shield synchronous grouting rapid hardening device is separated from the shield tail, and is separated from the shield tail by a pipe ring width, namely the segment 23 is separated from the second ring of the shield tail, the ball valve 2 is used for connecting an external accelerator injection pipeline, and then the ball valve 2 is opened for injecting accelerator;
s7: when the injection pressure of the accelerator is larger than the resultant force of water, soil and slurry outside the pipe piece 23, the osmotic damping film 15 is stressed to extend out of the pipe piece 23, the accelerator is continuously injected, the injection pressure is kept to be slightly larger than the resultant force of water, soil and slurry outside the pipe piece 23 by 0.01Mpa, and the accelerator starts to permeate the osmotic damping film 15 and reacts with the synchronous grouting slurry 28;
s8: calculating and controlling the injection quantity and the expansion range of the accelerator according to the reaction time of the accelerator and the synchronous grouting slurry 28, the grouting pressure and the permeability of the permeable damping film 15;
S9: after the slurry coagulation block 30 with certain strength is formed, the ball valve 2 is closed, and the slurry is coagulated after waiting for 30 minutes;
S10: the hoisting hole 24 is plugged by cement, and a check valve is installed.
Waiting for 30 minutes in S9 to coagulate the slurry, the specific operation includes the following steps:
s51: opening the ball valve 2 to check whether the liquid flows out;
s52: if the running water phenomenon exists, closing the ball valve 2 to wait for slurry coagulation;
s53: and after condensation, the grouting head 4 is rotated, the permeable damping film 15 is separated from the lifting hole 24, and the grouting head 4 is pulled out.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The application method of the shield synchronous grouting rapid hardening device is characterized by comprising the following steps of:
S1: assembling a shield synchronous grouting rapid hardening device;
S2: pre-judging a shield tunnel section which needs to accelerate the coagulation of synchronous grouting slurry;
S3: after the duct piece (23) is assembled into a ring, openings (25) with the diameter of 38mm are formed in the sealing blocks at the top of the pipe ring and the adjacent blocks at two sides of the sealing blocks, which are close to one end of the hoisting hole;
s4: installing a shield synchronous grouting quick setting device in a lifting hole (24) of the duct piece (23), and closing the ball valve (2);
s5: the shield pushing jack pushes the segment (23) provided with the shield synchronous grouting rapid hardening device, and synchronous grouting is carried out at the shield tail to fill gaps between the segment (23) and the soil layer (29);
S6: when a segment (23) of the shield synchronous grouting rapid hardening device is separated from the shield tail, and a segment ring width is arranged at a distance from the shield tail, namely, the segment (23) is separated from a second ring of the shield tail, the ball valve (2) is used for connecting an external accelerator injection pipeline, and then the ball valve (2) is opened for injecting accelerator;
s7: when the injection pressure of the accelerator is larger than the resultant force of water, soil and slurry outside the duct piece (23), the osmotic damping film (15) is stressed to extend out of the duct piece (23), the accelerator is continuously injected, the injection pressure is kept to be slightly larger than the resultant force of water, soil and slurry outside the duct piece (23) by 0.01Mpa, and the accelerator starts to permeate the osmotic damping film (15) and reacts with synchronous grouting slurry (28);
S8: calculating and controlling the injection amount and the expansion range of the accelerator according to the reaction time of the accelerator and the synchronous grouting slurry (28), the grouting pressure and the permeability of the permeable damping film (15);
S9: after the slurry coagulation block (30) with certain strength is formed, closing the ball valve (2), and waiting for 30 minutes to coagulate the slurry;
s10: plugging the lifting hole (24) by cement, and installing a check valve;
the waiting for 30 minutes causes the slurry to coagulate, the specific operations comprising the steps of:
s51: opening the ball valve (2) to check whether the liquid flows out;
s52: if the running water phenomenon exists, closing the ball valve (2) to wait for slurry coagulation;
s53: rotating the grouting head (4) after condensation, separating the permeable damping film (15) from the lifting hole (24), and pulling out the grouting head (4);
The shield synchronous grouting rapid hardening device comprises a grouting rapid hardening structure main body (1) and more than two pipe rings arranged on the inner wall of a shield machine body (27), wherein each pipe ring comprises more than two pipe pieces (23), a hoisting hole (24) is formed in one side inner wall of each pipe piece (23), and a threaded pipe (26) is arranged on the inner wall of each hoisting hole (24); the grouting rapid hardening structure main body (1) comprises a ball valve (2), an external thread (3), a grouting head (4), a waterproof sleeve (5) and a permeable damping film (15), wherein the circumferential inner wall of the external thread (3) is fixedly connected to the circumferential outer wall of the grouting head (4), and a threaded pipe (26) is matched with the external thread (3); one end of the grouting head (4) is fixedly connected with a feeding end (8), and the circumferential outer wall of the feeding end (8) is provided with a pipe tooth (6); the circumference outer wall of the grouting head (4) is provided with a clamping groove (31), the inner wall of the waterproof sleeve (5) is arranged on the inner wall of the clamping groove (31) through a clamping block (10), and the circumference outer wall of the clamping block (10) is arranged on the circumference outer wall of the waterproof sleeve (5); the circumferential inner wall of the grouting head (4) is provided with a through hole (7);
The ball valve (2) is connected and fixed with the feeding end (8) of the grouting head (4) through the pipe teeth (6), after the osmotic damping film (15) is fixed on the grouting head (4), the contracted osmotic damping film (15) bag body is plugged into the through hole (7) from one end of the grouting head (4), the outer surface of the waterproof sleeve (5) is contacted with the inner wall of the lifting hole (24) on the pipe piece (23), and the clamping block (10) is arranged in the clamping groove (31) on the grouting head (4).
2. The use method of the shield synchronous grouting rapid hardening device according to claim 1, wherein the grouting head (4) is made of a 45 # steel material, and the grouting head (4) is integrally a straight cylinder.
3. The use method of the shield synchronous grouting rapid hardening device according to claim 2, wherein the waterproof sleeve (5) is made of water-swelling rubber, and the waterproof sleeve (5) is in a ring shape.
4. The use method of the shield synchronous grouting rapid hardening device according to claim 3, wherein the other end of the grouting head (4) is fixedly connected with a discharge end (13), two connecting grooves (11) are formed in the circumferential outer wall of the discharge end (13), T-shaped grooves (12) are formed in the bottom inner wall and the top inner wall of the two connecting grooves (11), and three elastic components (14) are arranged on the inner walls of the opposite sides of the two connecting grooves (11).
5. The method for using the shield synchronous grouting rapid hardening device according to claim 4, wherein one end of the penetration damping film (15) is provided with a port (20), the circumferential outer wall of the port (20) is provided with a sleeve (16), the circumferential inner wall of the sleeve (16) is provided with two connecting blocks (18), and the connecting blocks (18) are matched with the connecting grooves (11).
6. The use method of the shield synchronous grouting rapid hardening device according to claim 5, wherein three connecting holes (17) are formed in the outer wall of one side of each of the two connecting blocks (18), the inner diameter of each connecting hole (17) is equal to the diameter of the elastic component (14), and T-shaped rubber blocks (19) are arranged on the outer walls of the bottom and the top of each connecting block (18).
7. The use method of the shield synchronous grouting rapid hardening device according to claim 6, wherein the outer wall of the penetration damping film (15) is provided with more than two elastic columns (21), the circumferential inner walls of the more than two elastic columns (21) are respectively and rotatably connected with a brush body assembly (22), and the brush body assembly (22) comprises an elastic rope and elastic nylon brush wires.
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