CN112281808A - Annular grouting freezing pipe - Google Patents
Annular grouting freezing pipe Download PDFInfo
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- CN112281808A CN112281808A CN202011192006.5A CN202011192006A CN112281808A CN 112281808 A CN112281808 A CN 112281808A CN 202011192006 A CN202011192006 A CN 202011192006A CN 112281808 A CN112281808 A CN 112281808A
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- 230000008014 freezing Effects 0.000 title claims abstract description 62
- 238000007710 freezing Methods 0.000 title claims abstract description 62
- 239000011440 grout Substances 0.000 claims abstract description 34
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007569 slipcasting Methods 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 27
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000003507 refrigerant Substances 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 18
- 230000000903 blocking effect Effects 0.000 abstract description 12
- 238000007596 consolidation process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 12
- 239000002689 soil Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010030 laminating Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000013543 active substance Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The embodiment of the invention provides an annular grouting freezing pipe, which comprises: the device comprises a drill bit, a first grouting pipe, a second grouting pipe, a freezing pipe wound on the outer wall of the first grouting pipe, and a plugging component for plugging the first grouting pipe; the first grouting pipe, the second grouting pipe and the drill bit are connected in sequence; the large end face is connected with the first end face of the first grouting pipe, the inner diameter of the large end face is the same as that of the first grouting pipe, and a grouting cavity is formed by the inner part of the first grouting pipe and the inner part of the second grouting pipe; the small end face of the second grouting pipe is connected with the drill bit and used for mounting the drill bit; the plugging component is plugged on the second end face of the first grouting pipe; the pipe wall of the second grouting pipe 9 is provided with a grout outlet penetrating through the pipe wall of one side; the consolidation effect of underground water can be improved by adopting the double measures of blocking and freezing water seal in the stratum, the stability of the surrounding stratum is ensured, and the safety is improved.
Description
Technical Field
The invention relates to the technical field of grouting freezing pipes, in particular to an annular grouting freezing pipe.
Background
In underground construction, in order to avoid pumping out underground water to destroy the underlying structure and waste water resources, a mode of pumping out water in the stratum is not adopted in the construction, and in order to not influence the underground construction, a mode of freezing water in the artificial underlying structure is generally adopted before the construction.
In the process of implementing the invention, the applicant finds that at least the following problems exist in the prior art: after the construction of the artificial freezing method, the bottom layer freezing construction effect is poor, so that the surrounding stratum is unstable, for the surrounding environment, the engineering property of soil and adjacent buildings are affected badly, for example, the foundation is unstable, so that the adjacent buildings are inclined and cracked, and in severe cases, the buildings collapse and other accidents can be caused, so that the bad results such as underground pipeline damage and the like can be caused.
Disclosure of Invention
The embodiment of the invention provides an annular grouting freezing pipe, which adopts double measures of blocking and freezing water seal in stratum, can improve the consolidation effect of underground water, ensure the stability of surrounding stratum, avoid accidents such as collapse of buildings and the like, and improve safety.
To achieve the above object, an embodiment of the present invention provides an annular grouting freezing pipe, including: the device comprises a drill bit, a first grouting pipe, a second grouting pipe, a freezing pipe wound on the outer wall of the first grouting pipe, and a plugging component for plugging the first grouting pipe;
the first grouting pipe, the second grouting pipe and the drill bit are sequentially connected, and the second grouting pipe is coaxial with the first grouting pipe;
the second grouting pipe is a conical annular pipe and is provided with a large end face and a small end face, and the outer diameter of the large end face is larger than that of the small end face; the first grouting pipe is provided with a first end face and a second end face;
the large end face is connected with the first end face of the first grouting pipe, the inner diameter of the large end face is the same as that of the first grouting pipe, and a grouting cavity is formed by the inner part of the first grouting pipe and the inner part of the second grouting pipe; the small end face of the second grouting pipe is connected with the drill bit and used for mounting the drill bit;
the plugging component is plugged on the second end face of the first grouting pipe; the plugging assembly is provided with a grouting opening for injecting the grout injected by the grouting machine into the first grouting pipe through the grouting opening;
the pipe wall of the second grouting pipe is provided with a grout outlet which penetrates through the pipe wall of the single side; the slurry outlet hole and the axis of the second slurry injection pipe form a first angle, and the first angle is not equal to half of the taper angle of the second slurry injection pipe; the freezing pipe is provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are positioned on the second end face side of the first grouting pipe.
Preferably, the pipe wall of the second grouting pipe is provided with a plurality of grout outlet holes, and the axes of the plurality of grout outlet holes are equidistant.
Preferably, a reinforcing piece is arranged between the freezing pipe and the outer wall of the first grouting pipe; the reinforcing part surrounds the outer wall of the first grouting pipe and is connected to the outer wall of the first grouting pipe;
the reinforcing part just has a plurality ofly, and a plurality of reinforcing parts are along the equidistant setting of the axis direction of first slip casting pipe.
Preferably, the grouting device further comprises an auxiliary suction device, wherein the suction device is arranged in the grouting cavity through the plugging assembly and is positioned in the grouting cavity formed by the first grouting pipe;
the auxiliary suction device comprises an injection pipe and a spray head, the injection pipe penetrates through the plugging assembly and extends along the axis of the first grouting pipe, the spray head is connected to one port of the injection pipe, and the port of the injection pipe is positioned close to the side of the second grouting pipe;
supplementary suction device still includes the guide rail and installation the sliding seat of filling tube, the guide rail with the sliding seat is located the slip casting intracavity, the guide rail is followed the axis direction of first slip casting pipe extends the setting, just the guide rail is connected on the inner wall in slip casting chamber, the sliding seat is connected in the guide rail with sliding.
Preferably, the injection pipe is in snap connection with the sliding seat.
Preferably, the plugging assembly comprises a bushing which is embedded in the first grouting pipe from the second end face of the first grouting pipe to plug the first grouting pipe.
Preferably, the bushing is connected with the first grouting pipe in a threaded manner.
Preferably, the plugging assembly further comprises an annular sealing groove, the annular sealing groove is arranged outside the second end face of the first grouting pipe and is fixedly connected to the second end face of the first grouting pipe, and the annular sealing groove is coaxial with the first grouting pipe;
the section of the annular sealing groove along the radial direction of the annular sealing groove is a symmetrical U-shaped groove, and the opening of the U-shaped groove faces to the axis of the annular sealing groove;
the bushing penetrates through the ring of the annular sealing groove and then is embedded into the first grouting pipe from the second end face of the first grouting pipe to plug the first grouting pipe;
the plugging assembly further comprises an elastic movable block embedded into the U-shaped groove of the annular sealing groove, and the elastic movable block is elastically attached to the peripheral wall of the bushing and the U-shaped bottom edge of the U-shaped groove through the elasticity of the elastic movable block.
Preferably, the side of the elastic movable block adjacent to the second end face of the first grouting pipe,
when the plugging component is installed, the elastic movable block is attached to a U-shaped vertical edge of the U-shaped groove, and the U-shaped vertical edge is close to the second end face; when the slurry pressure in the grouting cavity is larger than the preset pressure, the liner is far away from the second end face of the first grouting pipe due to the slurry pressure, and the elastic movable block is attached to the other vertical edge of the U-shaped groove due to the slurry pressure.
Preferably, the plugging assembly further comprises a blocking piece, the blocking piece is arranged on the peripheral wall of the bushing and embedded into the U-shaped groove of the annular sealing groove, and the blocking piece is arranged between the free end of the bushing and the elastic movable block.
The technical scheme has the following beneficial effects: by adopting the double measures of water seal blocking and freezing in the stratum, the consolidation effect of underground water can be improved, the stability of the surrounding stratum is ensured, accidents such as collapse of buildings and the like are avoided, and the safety is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an axial cross-sectional view of an annular grouting freeze tube of an embodiment of the invention;
FIG. 2 is a left side view of FIG. 1 (without the occluding component);
FIG. 3 is a schematic perspective sectional view of an annular grouting freezing pipe according to an embodiment of the invention;
FIG. 4 is a schematic top view of an annular grouting freeze tube according to an embodiment of the invention;
fig. 5 is a schematic view of the internal structure of the second grouting pipe.
The reference numerals are represented as:
1. a grouting cavity; 2. a freezing pipe; 3. a reinforcement; 4. a first grouting pipe; 5. a guide rail; 6. a sliding seat; 7. an injection pipe; 8. a spray head; 9. a second grouting pipe; 10. a drill bit; 11. a sealing groove; 12. a bushing; 13. an elastic movable block; 14. a baffle plate; 15. a slurry outlet; 16. a circulation channel 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-5, in connection with an embodiment of the present invention, there is provided an annular grouting freezing tube, including: the drilling head 10, the first grouting pipe 4, the second grouting pipe 9, the freezing pipe 2 wound on the outer wall of the first grouting pipe 4, and the plugging component for plugging the first grouting pipe 4. The annular grouting freezing pipe is used for conveying a refrigerant and slurry to a stratum to be excavated when water is contained in all excavated strata during underground construction, so that the flow of water in the stratum is prevented, and the surrounding strata keep stable during construction.
The first grouting pipe 4, the second grouting pipe 9 and the drill 10 are sequentially connected, and the second grouting pipe 9 is coaxial with the first grouting pipe 4. The second grouting pipe 9 is a conical annular pipe, the second grouting pipe 9 is provided with a large end face and a small end face, and the outer diameter of the large end face is larger than that of the small end face; the first grouting pipe 4 has a first end face and a second end face. The large end face is connected with the first end face of the first grouting pipe 4, the inner diameter of the large end face is the same as that of the first grouting pipe 4, and a grouting cavity 1 is formed by the pipeline inside the first grouting pipe 4 and the pipeline inside the second grouting pipe 9; the small end face of the second grouting pipe 9 is connected with the drill 10 for installing the drill 10. The plugging component is plugged at the second end face of the first grouting pipe 4; and the plugging component is provided with a grouting opening for injecting the grout injected by the grouting machine into the first grouting pipe 4 through the grouting opening.
The pipe wall of the second grouting pipe 9 is provided with a grout outlet 15 penetrating through the pipe wall of one side; the grout outlet 15 and the axis of the second grout pipe 9 form a first angle which is not equal to half of the taper angle of the second grout pipe 9; the freezing pipe 2 is provided with a refrigerant inlet and a refrigerant outlet which are positioned on the second end face side of the first grouting pipe 4.
When the annular grouting freezing pipe works, a drill 10 is positioned and drilled in a stratum to be constructed, a grouting machine is connected with a grouting opening, and the grouting machine can convey grout into a grouting cavity 1 formed by the inner part of the first grouting pipe 4 and the inner part of the second grouting pipe 9 through the grouting opening. Under the action of the grouting pressure, the grout moves from the first grouting pipe 4 to the second grouting pipe 9 and is led out of the grout outlet 15 into the stratum, so that the grout blocks the pores in the stratum.
After grouting is completed and curing is completed (for example, curing time is 28 days), freezing is performed. When freezing, the power device presses the refrigerant into the inlet which is positioned at the second end surface and passes through the circulating channel 16, the refrigerant flows to the first section surface along the circulating channel 16, the circulating channel 16 is connected to the refrigerant inlet of the freezing pipe 2, the refrigerant enters the freezing pipe 2 from the refrigerant inlet, flows through the whole freezing pipe 2 and flows out from the refrigerant outlet of the freezing pipe 2, and then enters the circulating channel 16 again, the refrigerant is in a one-way flowing state (or a one-way circulating flowing state) in the circulating channel 16 and the freezing pipe 2, so that the refrigerant is filled in the whole freezing pipe 2 and the circulating channel 16 all the time, because the freezing pipe 2 contacts the stratum to be constructed, the temperature of the refrigerant is low, the soil layer outside can be cooled, the water in the stratum can be frozen and solidified, after circulating for months, the hardness of the frozen soil reaches a certain value, and the water can not flow out to influence construction, And avoids the phenomenon that the place where the water in the stratum is taken by adopting the traditional mode is wasted.
By adopting the dual measures of water condensation and plugging in the stratum, the consolidation effect of underground water can be improved, the stability of the surrounding stratum is ensured, accidents such as collapse of buildings and the like are avoided, and the safety is improved.
Preferably, the sum of the wall thickness of the first grouting pipe 4 and the thickness of the freezing pipe 2 is the same as that of the second grouting pipe 9, the connection between the freezing pipe 2 and the first grouting pipe 4 can be welding, and the grouting and freezing combination enables the stratum frozen by the freezing pipe to form a temporary supporting structure. Freezing pipe 2 and first slip casting pipe 4 and being the inside and outside pipe relation, can atress each other, come the pressure that the balanced inside and outside stratum brought, can be fine at the maintenance process after the slip casting in, play fine resistance to compression effect, guarantee the stability of supporting mechanism to holistic practicality has been increased.
Preferably, the pipe wall of the second grouting pipe 9 is provided with a plurality of grout outlet holes 15, and the axes of the plurality of grout outlet holes 15 are equidistant. The plurality of grout outlet holes 15 facilitate the flow of grout out of the peripheral wall of the second grout pipe 9 and close off gaps in the formation around the second grout pipe 9. The axes of the slurry outlet holes 15 are equidistant, so that slurry is uniformly discharged, stratum gaps are uniformly blocked, and the blocking effect is improved.
Preferably, a reinforcing part 3 is arranged between the freezing pipe 2 and the outer wall of the first grouting pipe 4; the reinforcing member 3 surrounds the outer wall of the first grouting pipe 4, the reinforcing member 3 is connected to the outer wall of the first grouting pipe 4, and the reinforcing member 3 can be fixedly connected to the outer wall of the first grouting pipe 4; after the reinforcing piece 3 is arranged, the pressure resistance of the stratum to the grouting freezing pipe can be improved. Stiffener 3 just has a plurality ofly, and equidistant setting of a plurality of stiffeners 3 along the axis direction of first slip casting pipe 4, machine-shaping convenience, easy implementation, facilitate promotion. The plurality of reinforcing pieces 3 are arranged at equal intervals along the axial direction of the first grouting pipe 4, so that the grouting freezing pipe is uniformly stressed, the stratum sinking deformation caused by the deformation of the grouting freezing pipe due to overhigh local stress is avoided, the normal operation of the grouting freezing pipe is ensured, and the service life of the whole grouting freezing pipe is prolonged.
Preferably, the device further comprises an auxiliary suction device, wherein the suction device is arranged in the grouting cavity 1 through the plugging assembly and is positioned in the grouting cavity 1 formed by the first grouting pipe 4; when slurry inside the grouting pipe 1 is blocked, the auxiliary suction device pumps out the blocking object from the grouting pipe 1 to the outside of the grouting freezing pipe, so that the effect of clearing the blockage is achieved. Keeping the slurry to flow out of the slurry outlet 15 smoothly. Or when the slurry activity in the grouting pipe 1 is reduced and the coagulation phenomenon occurs, the active substance (solvent) is conveyed to the grouting pipe 1 through the auxiliary suction device, and the activity of the slurry is recovered after the active substance enters the slurry. The auxiliary suction device comprises an injection pipe 7 and a spray head 8, a hole is formed in the plugging assembly, the injection pipe 7 penetrates through the plugging assembly and extends along the axis of the first grouting pipe 4, the spray head 8 is connected to one port of the injection pipe 7, and the port of the injection pipe 7 is close to the side of the second grouting pipe 9. Supplementary suction device still includes guide rail 5 and installation the sliding seat 6 of filling tube 7, guide rail 5 with sliding seat 6 is located in the slip casting chamber 1, guide rail 5 is followed the axis direction of first slip casting pipe 4 extends the setting, and guide rail 5 connects on the inner wall in slip casting chamber 1, sliding seat 6 connects in guide rail 5 slidably. The length of the guide rail 5 may be the same as the length of the inner cavity of the first grouting chamber 4.
Move in slip casting chamber 1 along guide rail 5 by sliding seat 6, when slip casting chamber 1 blockked up, sliding seat 6 drives injection pipe 7 and slides in to block up the region, makes shower nozzle 8 can suck the stopper be thick liquid (thick liquids) through power device, then the stopper is taken out the thick liquid to the slip casting chamber 1 outside through injection pipe 7. When the solvent is required to be added into the local area of the grout liquid, the solvent is injected into the injection pipe 7 through the power device, is conveyed to the spray head 8 through the injection pipe 7, is transmitted to the designated position through the spray head 8 and is sprayed onto the grout, so that the grout can be continuously output into the stratum. The overall practicability of the grouting freezing pipe is improved.
Preferably, the injection pipe 7 is connected with the sliding seat 6 in a snap-fit manner (in a snap-fit manner), and the injection pipe 7 is snapped into the sliding seat 6 (in a snap-fit manner), so that the sliding seat 6 can drive the injection pipe 7 to slide along the outer side of the guide rail 5, thereby facilitating the disassembly.
Preferably, the plugging assembly comprises a bushing 12, and the bushing 12 is embedded in the first grouting pipe 4 from the second end face of the first grouting pipe 4 to plug the first grouting pipe 4, so that the grout in the grouting cavity 1 is maintained inside the bushing.
Preferably, the connecting mode of the lining 12 and the first grouting pipe 4 is threaded connection, and the connecting mode is convenient to connect, convenient to manufacture, and good in fastening performance and sealing performance.
Preferably, the plugging assembly further comprises an annular sealing groove 11, the annular sealing groove 11 is arranged outside the second end face of the first grouting pipe 4 and is fixedly connected to the second end face of the first grouting pipe 4, and the annular sealing groove 11 is coaxial with the first grouting pipe 4;
the section of the annular sealing groove 11 along the radial direction is a symmetrical U-shaped groove, and the opening of the U-shaped groove faces to the axis of the annular sealing groove 11;
the bushing 12 penetrates through the ring of the annular seal groove 11 and then is embedded into the first grouting pipe 4 from the second end face of the first grouting pipe 4 to plug the first grouting pipe 4;
the shutoff subassembly is still including the embedding the elasticity movable block 13 of the U-shaped recess of ring seal groove 11, through elasticity of elasticity movable block 13 self is in its elasticity laminating the perisporium of bush 12 with on the U type bottom edge of U-shaped recess, elasticity movable block 13 has the effect of sealed slip casting chamber 1, and elasticity movable block 13 is sealed jointly with bush 12, improves the sealed effect in slip casting chamber 1.
Preferably, the side of the elastic movable block 13 adjacent to the second end face of the first grouting pipe 4. When the plugging component is installed, the elastic movable block 13 is attached to a U-shaped vertical edge of the U-shaped groove, and the U-shaped vertical edge is close to the second end face; when grout pressure in the grouting cavity 1 is greater than preset pressure, grout pressure makes bush 12 is kept away from 4 second terminal surfaces of first slip casting pipe, grout pressure make elasticity movable block 13 laminating on another perpendicular edge of U-shaped recess and the U type bottom edge of U-shaped recess to reach the effect of auto-lock, can play double seal's effect, avoid thick liquids to ooze from annular seal groove 11, increased the stability that thick liquids were carried, also guaranteed the stability that the stratum freezed promptly. The elastic movable block 13 can play a role in sealing no matter which vertical edge of the U-shaped groove, so that the double-sealing function is realized.
Preferably, the blocking assembly further includes a blocking piece 14, the blocking piece 14 is disposed on the circumferential wall of the bushing 12 and embedded in the U-shaped groove of the annular sealing groove 11, and the blocking piece 14 is disposed between the free end of the bushing 12 and the elastic movable block 13. When the plugging assembly is installed, a gap is reserved between the baffle plate 14 and the other vertical edge of the U shape of the U-shaped groove; when thick liquid pressure in slip casting chamber 1 is greater than normal pressure, separation blade 14 laminate in another perpendicular limit of the U type of U-shaped recess has limiting displacement, avoids elastic movable block 13 to deviate from annular seal groove 11 and lead to bush 12 also to deviate from, cause the thick liquid in slip casting chamber 1 to leak outward, influence the shutoff to rivers in the stratum, reduce the efficiency of construction.
The embodiment of the invention has the following beneficial effects:
1. the stratum is frozen by adopting grouting and a refrigerant together, so that the freezing effect on the water-bearing stratum is improved; the pipe wall of the second grouting pipe is provided with a grout outlet which penetrates through the pipe wall of the single side; the axis of grout outlet and second slip casting pipe forms first angle, and first angle is less than 90 degrees for the inside thick liquids of slip casting chamber are discharged to the opposite direction of drill bit drilling direction, protect the drill bit, guarantee the smoothness of construction.
2. Through setting up the bush in first slip casting pipe and slip casting machine junction, when slip casting pipe internal pressure was too big, the bush can be through laminating elasticity movable block laminating annular seal groove, and the separation blade also laminates spacingly with the slip casting pipe simultaneously to play double seal's effect, the leakproofness of further increase junction increases the stability of defeated material in-process.
3. Through the guide rail that sets up length in first slip casting pipe, fix the filling tube block in the sliding seat, can appear blockking up or when needing the solubilizer in the inside slip casting pipe, can extend the filling tube to appointed position along the guide rail by the sliding seat, play the mediation and block up or increase the active effect of thick liquid to the flexibility of defeated material work has been increased.
4. Through freezing and set up multiunit reinforcement between pipe and the first slip casting pipe, when the thick liquids that the play thick liquid hole in the second slip casting pipe was derived was maintained, the resistance to compression effect that plays that can be fine, effectual improvement supporting construction's design effect to holistic practicality has been increased.
In summary, during the construction of the underground water area engineering, the annular grouting freezing pipe is adopted to plug and freeze the stratum, so that water in the stratum is frozen, natural rock soil is changed into frozen soil, the strength and the stability of the frozen soil are improved, the connection between underground water and underground engineering is isolated, the underground engineering digging construction is conveniently carried out under the protection of the frozen wall, and the annular grouting freezing pipe has the advantages of forming the frozen soil wall under extremely complex engineering geology and hydrogeology conditions, being not limited by the supporting range and the supporting depth, having strict waterproofness, no pollution and the like. The method avoids the defects of frost heaving and thaw collapse of the stratum in the prior art, and solves the problems that the engineering property of soil and adjacent buildings are adversely affected for the surrounding environment, for example, foundation instability is caused, the adjacent buildings are inclined and cracked, and the buildings collapse and other accidents are caused in serious conditions, so that underground pipelines are damaged and other adverse consequences are caused.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An annular grouting freezing tube, comprising: the device comprises a drill bit (10), a first grouting pipe (4), a second grouting pipe (9), a freezing pipe (2) wound on the outer wall of the first grouting pipe (4), and a plugging component for plugging the first grouting pipe (4);
the first grouting pipe (4), the second grouting pipe (9) and the drill bit (10) are sequentially connected, and the second grouting pipe (9) is coaxial with the first grouting pipe (4);
the second grouting pipe (9) is a conical annular pipe, the second grouting pipe (9) is provided with a large end face and a small end face, and the outer diameter of the large end face is larger than that of the small end face; the first grouting pipe (4) has a first end face and a second end face;
the large end face is connected with the first end face of the first grouting pipe (4), the inner diameter of the large end face is the same as that of the first grouting pipe (4), and a grouting cavity (1) is formed by the pipeline inside of the first grouting pipe (4) and the pipeline inside of the second grouting pipe (9); the small end face of the second grouting pipe (9) is connected with the drill bit (10) and used for installing the drill bit (10);
the plugging component is plugged on the second end face of the first grouting pipe (4); the plugging assembly is provided with a grouting opening for injecting the grout injected by the grouting machine into the first grouting pipe (4) through the grouting opening;
the pipe wall of the second grouting pipe (9) is provided with a grout outlet (15) penetrating through the pipe wall of one side; the grout outlet (15) and the axis of the second grouting pipe (9) form a first angle which is not equal to half of the cone angle of the second grouting pipe (9); the freezing pipe (2) is provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are positioned on the second end face side of the first grouting pipe (4).
2. The annular grouting freezing pipe according to claim 1, characterized in that the pipe wall of the second grouting pipe (9) is provided with a plurality of said grout outlet holes (15), and the axes of the plurality of grout outlet holes (15) are equally spaced.
3. The annular grouting freezing pipe according to claim 1, characterized in that a reinforcement (3) is arranged between the freezing pipe (2) and the outer wall of the first grouting pipe (4); the reinforcing piece (3) surrounds the outer wall of the first grouting pipe (4), and the reinforcing piece (3) is connected to the outer wall of the first grouting pipe (4);
the reinforcing parts (3) are provided with a plurality of reinforcing parts, and the plurality of reinforcing parts (3) are arranged at equal intervals along the axial direction of the first grouting pipe (4).
4. The annular grouting freezing pipe according to claim 1, further comprising an auxiliary suction device, wherein the suction device is arranged in the grouting cavity (1) through the plugging assembly and is positioned in the grouting cavity (1) formed by the first grouting pipe (4);
the auxiliary suction device comprises an injection pipe (7) and a spray head (8), the injection pipe (7) penetrates through the plugging assembly and extends along the axis of the first grouting pipe (4), the spray head (8) is connected to one port of the injection pipe (7), and the port of the injection pipe (7) is positioned at the side close to the second grouting pipe (9);
supplementary suction device still includes guide rail (5) and installation sliding seat (6) of filling tube (7), guide rail (5) with sliding seat (6) are located in grouting cavity (1), guide rail (5) are followed the axis direction of first slip casting pipe (4) extends the setting, just guide rail (5) are connected on the inner wall in grouting cavity (1), sliding seat (6) are connected in guide rail (5) with sliding.
5. Annular grouting freezing pipe according to claim 4, characterised in that the injection pipe (7) is snap-connected with the sliding seat (6).
6. The annular grouting freeze tube according to claim 1, characterized in that the plugging assembly comprises a bushing (12), the bushing (12) plugging the first grouting tube (4) from the second end face of the first grouting tube (4) embedded within the first grouting tube (4).
7. An annular grouting freezing pipe according to claim 6, characterised in that the bushing (12) is connected to the first grouting pipe (4) in a threaded manner.
8. The annular grouting freezing pipe according to claim 6, wherein the plugging assembly further comprises an annular sealing groove (11), the annular sealing groove (11) is arranged outside the second end face of the first grouting pipe (4) and is fixedly connected to the second end face of the first grouting pipe (4), and the annular sealing groove (11) is coaxial with the first grouting pipe (4);
the section of the annular sealing groove (11) along the radial direction is a symmetrical U-shaped groove, and the opening of the U-shaped groove faces to the axis of the annular sealing groove (11);
the bushing (12) penetrates through the ring of the annular sealing groove (11) and then is embedded into the first grouting pipe (4) from the second end face of the first grouting pipe (4) to plug the first grouting pipe (4);
the plugging assembly further comprises an elastic movable block (13) embedded into the U-shaped groove of the annular sealing groove (11), and the elastic movable block (13) is elastically attached to the peripheral wall of the lining (12) and the U-shaped bottom edge of the U-shaped groove through the elasticity of the elastic movable block (13).
9. Annular grouting freezing pipe according to claim 8, characterised in that the side of the elastic moving block (13) adjacent to the second end face of the first grouting pipe (4),
when the plugging component is installed, the elastic movable block (13) is attached to a U-shaped vertical edge of the U-shaped groove, and the U-shaped vertical edge is close to the second end face; when the slurry pressure in the grouting cavity (1) is greater than the preset pressure, the liner (12) is far away from the second end face of the first grouting pipe (4) due to the slurry pressure, and the elastic movable block (13) is attached to the other vertical edge of the U-shaped groove due to the slurry pressure.
10. The annular grouting freezing pipe according to claim 9, wherein the plugging assembly further comprises a baffle (14), the baffle (14) is arranged on the peripheral wall of the bushing (12) and embedded in the U-shaped groove of the annular sealing groove (11), and the baffle (14) is arranged between the free end of the bushing (12) and the elastic movable block (13).
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| CN202011192006.5A CN112281808B (en) | 2020-10-30 | 2020-10-30 | Annular grouting freezing pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011192006.5A CN112281808B (en) | 2020-10-30 | 2020-10-30 | Annular grouting freezing pipe |
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| CN112281808B CN112281808B (en) | 2024-09-24 |
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Cited By (1)
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| CN115419377A (en) * | 2022-11-07 | 2022-12-02 | 西安尔吉环保科技有限公司 | Slip casting pipe drill bit for highway construction |
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| CN112281808B (en) | 2024-09-24 |
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