CN111927377B - Energy-saving tunnel advanced small guide pipe quick-assembling grout stopping structure - Google Patents
Energy-saving tunnel advanced small guide pipe quick-assembling grout stopping structure Download PDFInfo
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- CN111927377B CN111927377B CN202010879932.3A CN202010879932A CN111927377B CN 111927377 B CN111927377 B CN 111927377B CN 202010879932 A CN202010879932 A CN 202010879932A CN 111927377 B CN111927377 B CN 111927377B
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- 239000011440 grout Substances 0.000 title claims abstract description 150
- 238000009415 formwork Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 3
- 239000000969 carrier Substances 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 23
- 239000000463 material Substances 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000945 filler Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 6
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 17
- 238000005553 drilling Methods 0.000 description 12
- 238000009434 installation Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Soil Sciences (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an energy-saving tunnel advanced small conduit fast-assembly grout stopping structure which comprises a holding clamp, a sliding die sleeve and an elastic grout stopping plug, wherein the holding clamp is clamped at one end, extending out of a tunnel face, of an advanced small conduit, the sliding die sleeve is sleeved on the outer side of the holding clamp and is in sliding fit with the holding clamp, the elastic grout stopping plug is wrapped on the outer side of the sliding die sleeve and is used for plugging a gap between the advanced small conduit and a hole wall, and a rotary thrust sleeve pushes the sliding die sleeve and the elastic grout stopping plug to synchronously move through a pushing bolt. The invention provides a base for positioning and pushing the elastic grout stop plug, the elastic grout stop plug extrudes and blocks a gap between the drill hole and the outer wall of the advanced small conduit under the action of a driving force, the operation is simple, convenient, flexible and flexible, the working procedure time is shortened without waiting for concrete solidification, the construction cycle is promoted, the construction efficiency of grouting constructors is improved, the waste and cost input of grouting materials are reduced, the grouting construction efficiency and the grouting effect are improved, and the working condition that a filler cannot be formed when stranded water in the drill hole is serious is solved.
Description
Technical Field
The invention belongs to the technical field of quick-assembly grout stopping of advanced small guide pipes, and particularly relates to a quick-assembly grout stopping structure of an energy-saving tunnel advanced small guide pipe.
Background
The construction tunnel of the tunnel site in the plateau area with the altitude of more than 3500 m has the advantages of high altitude, bad weather and high environmental protection requirement in the construction area, and the oxygen content and the air pressure value are only 65 percent of the normal value. The ventilation length of the tunnel grown on the mountains in the alpine region of the plateau is long, and the ventilation length is influenced by the environment with low air pressure and low oxygen content, so that the efficiency of construction equipment and the working efficiency of personnel are seriously reduced. The energy-saving control in the tunnel advanced small conduit grouting construction is particularly important.
In the common tunnel advanced small duct construction, a gap plugging mode between a drilling hole wall and the outer wall of the advanced small duct adopts a filler which is mixed by hemp fibers such as cement mortar, an anchoring agent, expansion cement and the like to plug, when the plugging filler can bear the specified maximum grouting pressure and water pressure after being solidified for 30-60 min, high-pressure grouting pump pressure grouting is adopted, the initial grouting pressure is 0.2-0.5 Mpa, and the grouting pressure is 0.7-1.0 Mpa in the later period, the grouting can be stopped after lasting for 15-20 min, the orifice of the small grouting duct is plugged to prevent the backflow of slurry outside the duct, and the mode has a plurality of defects: firstly, the filling material is solidified for 30-60 min, so that the circulating construction time of the tunnel is prolonged, and the principle of 'quick support and early sealing' in tunnel construction is violated; secondly, the stuffing is made of a hard material different from the material of the tunnel surrounding rock, so that the stuffing is subjected to dry shrinkage in the solidification process, and the slurry leakage phenomenon during grouting is easily caused; thirdly, the tunnel is constructed underground, underground water is mostly existed in the surrounding rock of the tunnel, water seepage and even strand water outflow occur in the drilled hole, the disturbance intensity of the underground water is influenced when the stuffing is stuffed and solidified, and the strand water even causes that the stuffing cannot be formed when the stuffing is serious; fourthly, in the field construction, the drilling of the surrounding rock of the advanced small guide pipe adopts a 50mm-60mm drill bit to form a hole according to different surrounding rocks, the specifications of the advanced guide pipe used in the common design construction are a hot-rolled seamless steel perforated pipe, the outer diameter is 42mm, the wall thickness is 3.5mm, the gap area between the hole wall of the drilled hole and the outer wall of the small guide pipe is 5.78-14.41 square centimeters, the advanced small guide pipe adopts high-pressure grouting pressure to be controlled to be 1Mpa at most, while 1Mpa is equivalent to 10kg of article to act on the construction area of each square centimeter, the outward pushing force of the cement grout on the stuffing is equivalent to the acting force of 57.8-144.1kg of objects, considering a safety factor of 1.25 in the case of pump pressure fluctuations, the thrust is also increased, the stuffing between the wall of the borehole and the outer wall of the small conduit needs to generate larger friction force to resist the outward thrust of the grout on the stuffing during grouting; fifthly, in the field construction of the traditional tunnel, a gap between the wall of the drilled hole and the outer wall of the small conduit is usually formed, a filler plugging method is adopted, a constructor needs to mix filler materials on site, the gap between the drilled hole and the small conduit is manually plugged, the filling is not easy to be dense, and the defects that the construction operation is complicated, the materials are wasted, and the filling quality is not easy to control exist.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an energy-saving tunnel advanced small conduit fast-assembling grout stopping structure aiming at the defects in the prior art, the grouting clamp is novel and reasonable in design, is firmly connected with the advanced small conduit through the holding clamp, provides a base for positioning and pushing the elastic grout stop plug, utilizes the sliding die sleeve to clamp and control the elastic grout stop plug and the holding clamp, and the elastic grout stop plug extrudes and seals a gap between a drilling hole and the outer wall of the advanced small conduit under the action of a driving force.
In order to solve the technical problems, the invention adopts the technical scheme that: energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: the mold comprises a holding fixture, a sliding mold sleeve and an elastic grout stop plug, wherein the holding fixture is clamped at one end, extending out of a palm face, of an advanced small conduit, the holding fixture is sleeved outside the holding fixture and is in sliding fit with the holding fixture, the elastic grout stop plug wraps the sliding mold sleeve outside and is used for blocking a gap between the advanced small conduit and a hole wall, the holding fixture comprises two matched holding clamps, each holding clamp comprises a holding clamp plate, a guide lug plate and a slide way, the guide lug plate is installed at one end, far away from the palm face, of the holding clamp plate, the slide way is installed on the holding clamp plate, a gap is reserved between the guide lug plate and the slide way, a threaded hole is formed in the guide lug plate, each sliding mold sleeve comprises two matched sliding mold frames, each sliding mold frame comprises a mold frame body matched with the outer wall of the holding clamp plate, a chute matched with the slide way is formed in the mold frame body, and an outward-turning connecting rod is arranged at one end, close to the guide lug plate, of the mold frame body, the die carrier connecting rod that turns up is provided with the constant head tank with screw hole complex, and the top-pushing bolt passes the screw hole and is connected with the constant head tank bottom, and the top-pushing bolt is kept away from the one end overcoat of constant head tank and is equipped with rotatory thrust cover.
Foretell energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: hold and be provided with the installation otic placode on the power splint, two hold and seted up the round hole on the installation otic placode in the power folder, two hold and seted up the U-shaped groove on another installation otic placode in the power folder, hold the power bolt and pass the round hole joint with two on the U-shaped groove hold the power folder and connect, two hold and be provided with first connecting cylinder and second connecting cylinder on holding the power splint of one in the power splint, two hold and be provided with on another one in the power splint with first connecting cylinder and the articulated complex third connecting cylinder of second connecting cylinder, the connection crab-bolt passes first connecting cylinder, third connecting cylinder and second connecting cylinder in proper order and holds two power splint articulated.
Foretell energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: the elastic grout stopping plug comprises two matched elastic grout stopping pieces, wherein each elastic grout stopping piece comprises an elastic grout stopping guide section, an elastic grout stopping blocking section and an elastic grout stopping reserved section, the elastic grout stopping guide section extends into a gap between the advanced small catheter and the hole wall, the elastic grout stopping blocking section is used for blocking the gap between the advanced small catheter and the hole wall, the elastic grout stopping reserved section is used for pulling and recovering the elastic grout stopping plug, the elastic grout stopping guide section, the elastic grout stopping blocking section and the elastic grout stopping reserved section are processed and manufactured into a whole, the outer diameter of the elastic grout stopping guide section is smaller than the outer diameter of the elastic grout stopping blocking section, and the elastic grout stopping blocking section is of a hollow circular truncated cone structure.
Foretell energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: the inner wall of one end, close to the elastic grout stopping guide section, of the elastic grout stopping plugging section is provided with a sealing layer matched with the outer wall of the holding force clamping plate, a formwork body limiting groove for accommodating the formwork body is formed from one end, far away from the elastic grout stopping guide section, of the elastic grout stopping plugging section to the inner wall between the sealing layers, one end, far away from the formwork outward turning connecting rod, of the formwork body is abutted to the end face of the sealing layer, and an outward turning connecting rod limiting groove matched with the formwork outward turning connecting rod is formed in the elastic grout stopping reserved section.
Foretell energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: and a plurality of rib rings which are arranged in parallel are arranged on the outer wall of the elastic grout stopping piece along the length direction of the elastic grout stopping piece.
Foretell energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: the rib rings are circular rings, and the widths of the rib rings are equal.
Foretell energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: the outer wall of the rotary thrust sleeve is of an outer hexagonal structure, and an observation window for observing the length of the pushing bolt is arranged on the rotary thrust sleeve.
Foretell energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: the inner wall of the holding clamp plate is provided with a resistance layer with a sawtooth structure.
Compared with the prior art, the invention has the following advantages:
1. the invention has the advantages that the clamping fixture is arranged to play a role of fixedly connecting with the advanced small conduit, the outer wall of the advanced small conduit is fixed on the outer wall of the advanced small conduit by the clamping force of the clamping plate with the clamping plate in opposite matching in a way of clamping the outer wall of the conduit with the conduit wall, a base is provided for positioning and pushing the elastic grout stop plug, the outer wall of the advanced small conduit is clamped in the clamping plate with the clamping force, the outer side of the clamping plate with the clamping force is provided with the slide way, and the clamping end of the clamping plate with the clamping force is provided with the guide lug plate to guide the pushing bolt to move forward, so that the invention is convenient for popularization and use.
2. The invention has the advantages that the sliding die sleeve is arranged to play a role of clamping and controlling the connection of the elastic grout stop plug and the holding force clamping plate, the two sliding die frames are respectively installed and connected with the two elastic grout stop plugs into a whole, the sliding die frames slide back and forth along the holding force clamping plate slide way, the rear parts of the sliding die frames are connected with the pushing bolts, and the pushing bolts rotate to push the sliding die frames and the elastic grout stop plugs to slide back and forth.
3. The invention has set up the elastic grout stopping plug, has played and squeezed the function of plugging the hole and leading the space between the small conduit outer wall under the function of driving force, the appearance of the plugging section is in the form of round platform, the front end is slightly smaller than the diameter of bore hole, it is easy to insert in the clearance, adapt to the bore hole of many apertures at the same time, two elastic grout stopping pieces are installed and connected with two sliding die carriers as an organic whole separately, the top pushes the bolt to rotate, the elastic grout stopping plug moves synchronously with sliding die carrier, in the actual use, according to the pore-forming pore wall smoothing effect of the bore hole of the surrounding rock is different, the elastic grout stopping plug that can be divided into no rib ring is used for the situation of smooth pore wall; and the elastic grout stop plug with the ribbed ring is used under the condition that the hole wall is rough, and is determined according to the actual drilling condition on site.
4. The structure of the invention is firmly and stably connected with the advanced small conduit, the effect of plugging the gap between the wall of the drilled hole and the outer wall of the advanced small conduit is obvious, and the purposes of improving work efficiency, being simple and convenient to operate, saving energy and reducing emission are achieved.
5. The invention has novel and reasonable design, and pushes the elastic grout stop plug to slide forwards through the spiral pushing, thereby achieving the purpose of closely plugging the gap between the outer wall of the advanced small conduit and the wall of the drill hole, and avoiding the defects of non-close plugging of the gap between the outer wall of the advanced small conduit and the wall of the drill hole and slurry leakage during grouting in the process of grouting the advanced small conduit in tunnel construction; the labor is saved, the working time of constructors is saved, a material plugging operation link is cancelled, the equal-strength time of plugging materials is reduced, the plugging materials are saved, the circulating operation time of a tunnel is shortened, the construction progress is accelerated, the advanced small catheter grouting quality is improved, the working condition that a filler cannot be formed when stranded water in a drill hole is serious is solved, and the rapid plugging device is convenient to popularize and use.
In conclusion, the invention has novel and reasonable design, is firmly connected with the advanced small conduit through the holding clamp, provides a base for positioning and pushing the elastic grout stop plug, utilizes the sliding die sleeve to clamp and control the elastic grout stop plug and the holding clamp, extrudes and seals a gap between the drill hole and the outer wall of the advanced small conduit under the action of a pushing force by the elastic grout stop plug, has simple, convenient and flexible operation, does not need to wait for concrete solidification to shorten the process time and promote the construction cycle, improves the construction efficiency of grouting constructors, reduces the waste and cost input of grouting materials, improves the grouting construction efficiency and the grouting effect, improves the grouting quality of the surrounding rocks of the conduit, solves the working condition that a filler cannot be formed when the stranded water in the drill hole is serious, and is convenient for popularization and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural view of the present invention in a state ready for installation.
Fig. 2 is a schematic structural view of the present invention in a state of complete installation of the structure.
Fig. 3 is a schematic structural view of the structure of the present invention in the plugging state.
Fig. 4 is an exploded view of fig. 3.
FIG. 5 is a schematic structural view of the elastic grout stopping member of the present invention.
Description of reference numerals:
| 1-holding splint; | 1-2-guide ear plate; | 1-3, mounting an ear plate; |
| 1-4-holding force bolt; | 1-5-a slide; | 1-6-a resistance layer; |
| 1-7-threaded hole; | 2-sliding die carrier; | 2-1-die carrier body; |
| 2-sliding chute; | 2-3-die carrier evagination connecting rod; | 3, positioning a groove; |
| 4-elastic grout stop member; | 4-1-limiting groove of connecting rod of turning up; | 4-2-die carrier body spacing groove; |
| 4-3-a sealing layer; | 4-elastic grout stopping guide section; | 4-5-elastic grout stopping plugging section; |
| 4-6-elastic grout stopping reserved section; | 5-a rib ring; | 6-pushing the bolt; |
| 7, rotating the thrust sleeve; | 8-advanced small catheter; | 9-observation window; |
| 10-a first connecting cylinder; | 11-a second connector barrel; | 12-a third connector barrel; |
| and 13, connecting anchor bolts. |
Detailed Description
As shown in fig. 1 to 5, the invention comprises a holding force clamp clamped at one end of an advanced small conduit 8 extending out of a palm surface, a sliding die sleeve sleeved outside the holding force clamp and in sliding fit with the holding force clamp, and an elastic grout stop plug wrapped outside the sliding die sleeve and used for blocking a gap between the advanced small conduit and a hole wall, wherein the holding force clamp comprises two holding force clamping pieces matched with each other, each holding force clamping piece comprises a holding force clamping plate 1-1, a guide ear plate 1-2 arranged at one end of the holding force clamping plate 1-1 far away from the palm surface, and a slide way 1-5 arranged on the holding force clamping plate 1-1, a gap is reserved between the guide ear plate 1-2 and the slide way 1-5, a threaded hole 1-7 is arranged on the guide ear plate 1-2, the sliding die sleeve comprises two sliding die bases 2 matched with each other, each sliding die base 2 comprises a body 2-1 matched with the outer wall of the holding force clamping plate 1-1, the die carrier body 2-1 is provided with a sliding groove 2-2 matched with the sliding way 1-5, the die carrier body 2-1 is provided with a die carrier outward turning connecting rod 2-3 at the outer side of one end close to the guide lug plate 1-2, the die carrier outward turning connecting rod 2-3 is provided with a positioning groove 3 matched with a threaded hole 1-7, a pushing bolt 6 penetrates through the threaded hole 1-7 to be connected with the bottom of the positioning groove 3, and a rotary thrust sleeve 7 is sleeved outside one end, far away from the positioning groove 3, of the pushing bolt 6.
The clamping device is fixedly connected with the advanced small conduit by arranging a holding clamp, a base is provided for positioning and pushing the elastic grout stop plug by fixing the clamping force of a holding clamp plate 1-1 which is matched with the holding clamp plate on the outer wall of the advanced small conduit 8 in a manner of clamping the outer wall of the conduit wall, the outer wall of the advanced small conduit 8 is clamped in the holding clamp plate 1-1, a slideway 1-5 is arranged on the outer side of the holding clamp plate 1-1, a guide lug plate 1-2 is arranged at the clamping end of the holding clamp plate 1-1 to guide a pushing bolt 6 to move forwards, and a gap is reserved between the guide lug plate 1-2 and the slideway 1-5 so as to ensure that a space is reserved for the positioning groove 3 when the positioning groove 3 is arranged subsequently; the sliding die sleeve is arranged to play a role in clamping and controlling connection of the elastic grout stop plug 4 and the holding clamp plate 1-1, the two sliding die frames 2 are respectively installed and connected with the two elastic grout stop plugs 4 into a whole, the sliding die frames 4 slide back and forth along the slide ways 1-5 on the holding clamp plate, the rear parts of the sliding die frames 4 are connected with the pushing bolts 6, the pushing bolts 6 rotate to push the sliding die frames 2 and the elastic grout stop plugs 4 to slide back and forth, and the die frame body 2-1 is provided with the die frame outwards-turning connecting rod 2-3 at the outer side of one end close to the guide lug plate 1-2 so as to install the positioning groove 3 to be matched with the threaded hole 1-7 and be reliably connected with the elastic grout stop plugs 4; the elastic grout stopping plug is arranged, so that the effect of extruding and blocking a gap between a drilling hole and the outer wall of the advanced small catheter under the action of a driving force is achieved, the appearance of a blocking section is in a circular truncated cone shape, the front end of the blocking section is slightly smaller than the diameter of the drilling hole, the blocking section can be conveniently inserted into a gap and can adapt to drilling holes with various apertures, two elastic grout stopping pieces are respectively installed and connected with two sliding die frames into a whole, a pushing bolt rotates, the elastic grout stopping plug synchronously moves along with a sliding die sleeve, and in actual use, the elastic grout stopping plug can be divided into elastic grout stopping plugs without rib rings for use under the condition of smooth hole walls according to different hole-forming hole wall smoothing effects of surrounding rock drilling; and the elastic grout stop plug with the ribbed ring is used under the condition that the hole wall is rough, and is determined according to the actual drilling condition on site.
In actual construction, the quick-mounting grout stopping structure is firmly and stably connected with the advanced small guide pipe, the effect of plugging the gap between the wall of the drilled hole and the outer wall of the advanced small guide pipe is obvious, and the aims of improving work efficiency, being simple and convenient to operate, saving energy and reducing emission are fulfilled; the elastic grout stop plug is pushed to slide forwards through the spiral pushing, so that the purpose of sealing the gap between the outer wall of the advanced small conduit and the wall of the drill hole tightly is achieved, and the defects that the gap between the outer wall of the advanced small conduit and the wall of the drill hole is not tightly sealed and the grout leaks during grouting in the grouting process of the advanced small conduit in tunnel construction are avoided; the labor is saved, the working time of constructors is saved, a material plugging operation link is cancelled, the equal-strength time of plugging materials is reduced, the plugging materials are saved, the circulating operation time of a tunnel is shortened, the construction progress is accelerated, the grouting quality of the advanced small catheter is improved, and the working condition that a filler cannot be formed when stranded water in a drill hole is serious is solved.
In this embodiment, the holding force splint 1-1 is provided with mounting ear plates 1-3, one mounting ear plate 1-3 of the two holding force clamping pieces is provided with a circular hole, the other mounting ear plate 1-3 of the two holding force clamping pieces is provided with a U-shaped groove, a holding force bolt 1-4 passes through the circular hole to be clamped on the U-shaped groove to connect the two holding force clamping pieces, one holding force splint 1-1 of the two holding force splints 1-1 is provided with a first connecting cylinder 10 and a second connecting cylinder 11, the other holding force splint 1-1 of the two holding force splints 1-1 is provided with a third connecting cylinder 12 which is hinged and matched with the first connecting cylinder 10 and the second connecting cylinder 11, and a connecting anchor bolt 13 sequentially passes through the first connecting cylinder 10, the third connecting cylinder 12 and the second connecting cylinder 11 hinge the two holding force splints 1-1.
It should be noted that a round hole is formed in one mounting ear plate 1-3 of the two clamping pieces, and a U-shaped groove is formed in the other mounting ear plate 1-3 of the two clamping pieces, so that when the clamping device is mounted, the mounting ear plate 1-3 with the round hole can be hooked with a clamping bolt 1-4 and a nut, and when the two clamping pieces are butted, the clamping bolt 1-4 can be directly clamped into the U-shaped groove formed in the other mounting ear plate 1-3, so that the matching of workers is reduced.
In the embodiment, the elastic grout stopping plug comprises two elastic grout stopping pieces 4 which are matched with each other, each elastic grout stopping piece 4 comprises an elastic grout stopping guide section 4-4 extending into a gap between the advanced small conduit and the hole wall, an elastic grout stopping blocking section 4-5 used for blocking the gap between the advanced small conduit and the hole wall and an elastic grout stopping reserved section 4-6 used for pulling and recovering the elastic grout stopping plug, the elastic grout stopping guide section 4-4, the elastic grout stopping blocking section 4-5 and the elastic grout stopping reserved section 4-6 are processed and manufactured into a whole, the outer diameter of the elastic grout stopping guide section 4-4 is smaller than that of the elastic grout stopping blocking section 4-5, and the elastic grout stopping blocking section 4-5 is of a hollow circular truncated cone structure.
It should be noted that the elastic grout stopping guide section 4-4 can firstly extend into a gap between the advanced small conduit and the hole wall, so that when the elastic grout stopping plug is pushed, the elastic grout stopping plugging section 4-5 staggers the gap between the advanced small conduit and the hole wall, which causes untight plugging, and the elastic grout stopping plugging section 4-5 is of a hollow circular truncated cone structure and is suitable for drilling holes with various apertures.
In the embodiment, a sealing layer 4-3 matched with the outer wall of the holding force splint 1-1 is arranged on the inner wall of one end, close to the elastic grout stopping guide section 4-4, of the elastic grout stopping plugging section 4-5, a formwork body limiting groove 4-2 for accommodating the formwork body 2-1 is formed between one end, far away from the elastic grout stopping guide section 4-4, of the elastic grout stopping plugging section 4-5 and the inner wall of the sealing layer 4-3, one end, far away from the formwork outward turning connecting rod 2-3, of the formwork body 2-1 is abutted to the end face of the sealing layer 4-3, and an outward turning connecting rod limiting groove 4-1 matched with the formwork outward turning connecting rod 2-3 is arranged on the elastic grout stopping reserved section 4-6.
In this embodiment, the outer wall of the elastic grout stopping member 4 is provided with a plurality of rib rings 5 arranged in parallel along the length direction.
It should be noted that, the purpose of providing the plurality of rib rings 5 arranged in parallel along the length direction on the outer wall of the elastic grout stopping member 4 is to increase the acting force between the elastic grout stopping member 4 and the hole wall, increase the tortuosity of water seepage and seepage, and ensure the sealing effect.
In this embodiment, the rib rings 5 are circular rings, and the widths of the plurality of rib rings 5 are all equal.
It should be noted that the purpose of the plurality of rib rings 5 having the same ring width is to ensure that the overall shape of the elastic grout stop plug is consistent with the shape formed by the two elastic grout stop members 4.
In this embodiment, the outer wall of the rotary thrust sleeve 7 is of an outer hexagonal structure, and an observation window 9 for observing the length of the pushing bolt 6 is formed in the rotary thrust sleeve 7.
It should be noted that the outer wall of the rotary thrust sleeve 7 is of an outer hexagonal structure so that an external force is applied to the rotation of the rotary thrust sleeve 7 by using an opening or a ring spanner, the pipe wall of the rotary thrust sleeve 7 is provided with a pushing bolt length observation hole, and the front of the rotary thrust sleeve is used for pushing a guide lug plate 1-2 on a force clamping plate.
In this embodiment, the inner wall of the holding splint 1-1 is provided with a resistance layer 1-6 with a sawtooth structure, and the resistance layer 1-6 is formed by threading on the inner wall of the holding splint 1-1.
When the invention is used, the process is as follows:
step one, after a drilling rig drills holes on a tunnel face, inserting a small advanced guide pipe 8 to a preset position;
step two, clamping a holding fixture at one end of the advanced small conduit extending out of the tunnel face, sleeving a sliding die sleeve on the outer side of the holding fixture and in sliding fit with the holding fixture, wrapping an elastic grout stop plug on the outer side of the sliding die sleeve, extending an elastic grout stop guide section 4-4 into a gap between the advanced small conduit and the hole wall, sequentially penetrating a connecting anchor bolt 13 through a first connecting cylinder 10, a third connecting cylinder 12 and a second connecting cylinder 11 to hinge two holding clamp plates 1-1, adjusting the grout stop structure to an installation preparation state, as shown in fig. 1, performing operation by one operator, pushing the grout stop structure forwards before applying no clamping force, inserting the elastic grout stop plug of the grout stop structure into the drill hole and manually pushing the elastic grout stop plug, using a spanner to tighten a holding bolt and a nut, fixing the grout stop structure on the advanced small conduit, and providing a stable base for the pushing part of the grout stop structure, at this time, the grout stopping structure is in an installation finished state, as shown in FIG. 2;
thirdly, a rotary thrust sleeve 7 at the rear end of the grout stopping structure is rotated by a wrench, under the rotation action of the rotary thrust sleeve 7, a pushing bolt is pushed to move forwards, the pushing bolt moves forwards and forms forward thrust on a sliding die carrier 2, and the sliding die carrier 2 drives an elastic grout stopping plug assembled integrally with the sliding die carrier to slide forwards along a slide way 1-5 of a holding force clamping plate 1-1;
step four, when the elastic grout stopping plugging section 4-5 is pushed to enter the drill hole for a certain depth, the resistance of the hole wall of the drill hole to the elastic grout stopping plug is increased, the gap between the outer wall of the advanced small catheter and the wall of the drill hole is fully plugged under the action of the elastic force of the elastic grout stopping plug, the application of the jacking force can be stopped, and at the moment, the grout stopping structure forms a plugging state, as shown in fig. 3;
fifthly, after the grout stopping structure is checked and the gap is sealed well, the advanced small conduit grouting operation can be carried out;
after the grouting operation of the advanced small guide pipe is finished, after cement slurry is initially set, rotating a rotating thrust sleeve 7 at the rear end of the grout stopping structure to drive a pushing bolt to move backwards, driving an elastic grout stopping plug assembled with a sliding mould frame to move backwards in a sliding way, and pulling the elastic grout stopping plug out of a gap between the outer wall of the advanced small guide pipe and the wall of a drilling hole;
and step seven, cleaning the grout stopping structure by using a high-pressure water gun, mounting the cleaned grout stopping structure to the pipe orifices of other advanced small pipes to be grouted, and performing grouting operation on the next advanced small pipe to realize the turnover use of the grout stopping structure.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. Energy-saving tunnel advances little pipe fast-assembling and ends thick liquid structure, its characterized in that: including centre gripping in advance little pipe (8) stretch out holding power anchor clamps, cover establish hold power anchor clamps the outside and with hold power anchor clamps sliding fit's slip die sleeve and parcel are in the slip die sleeve outside just is used for the elasticity in shutoff space between little pipe and the pore wall in advance and only starch the stopper, hold power anchor clamps and include two matched with and hold power folder, hold power folder including holding power splint (1-1), install and keep away from direction otic placode (1-2) of face one end and install slide (1-5) on holding power splint (1-1), leave the clearance between direction otic placode (1-2) and slide (1-5), set up screw hole (1-7) on direction otic placode (1-2), the slip die sleeve includes two matched with slip die carriers (2), the sliding die carrier (2) comprises a die carrier body (2-1) matched with the outer wall of the holding clamp plate (1-1), a sliding groove (2-2) matched with the sliding rail (1-5) is formed in the die carrier body (2-1), a die carrier outward-turning connecting rod (2-3) is arranged on the outer side of one end, close to the guide lug plate (1-2), of the die carrier body (2-1), a positioning groove (3) matched with the threaded hole (1-7) is formed in the die carrier outward-turning connecting rod (2-3), a pushing bolt (6) penetrates through the threaded hole (1-7) and is connected with the bottom of the positioning groove (3), and a rotary thrust sleeve (7) is sleeved at one end, far away from the positioning groove (3), of the pushing bolt (6).
2. The energy-saving tunnel advanced small conduit fast-assembling grout stopping structure according to claim 1, which is characterized in that: the clamping device is characterized in that the holding force clamping plate (1-1) is provided with mounting lug plates (1-3), one mounting lug plate (1-3) of the two holding force clamping pieces is provided with a round hole, the other mounting lug plate (1-3) of the two holding force clamping pieces is provided with a U-shaped groove, a holding force bolt (1-4) penetrates through the round hole to be clamped on the U-shaped groove to connect the two holding force clamping pieces, one holding force clamping plate (1-1) of the two holding force clamping plates (1-1) is provided with a first connecting cylinder (10) and a second connecting cylinder (11), the other holding force clamping plate (1-1) of the two holding force clamping plates (1-1) is provided with a third connecting cylinder (12) in hinged fit with the first connecting cylinder (10) and the second connecting cylinder (11), and a connecting anchor bolt (13) sequentially penetrates through the first connecting cylinder (10), The third connecting cylinder (12) and the second connecting cylinder (11) are used for hinging the two holding force splints (1-1).
3. The energy-saving tunnel advanced small conduit fast-assembling grout stopping structure according to claim 1, which is characterized in that: the elastic grout stopping plug comprises two elastic grout stopping pieces (4) which are matched with each other, each elastic grout stopping piece (4) comprises an elastic grout stopping guide section (4-4) extending into a gap between the corresponding advanced small conduit and the corresponding hole wall, an elastic grout stopping plugging section (4-5) used for plugging the gap between the corresponding advanced small conduit and the corresponding hole wall and an elastic grout stopping reserved section (4-6) used for pulling and recovering the elastic grout stopping plug, the elastic grout stopping guide section (4-4), the elastic grout stopping plugging section (4-5) and the elastic grout stopping reserved section (4-6) are machined and manufactured into a whole, the outer diameter of the elastic grout stopping guide section (4-4) is smaller than that of the elastic grout stopping plugging section (4-5), and the elastic grout stopping plugging section (4-5) is of a hollow circular truncated cone structure.
4. The energy-saving tunnel advanced small conduit fast-assembling grout stopping structure according to claim 3, characterized in that: the inner wall of one end, close to the elastic grout stopping guide section (4-4), of the elastic grout stopping plugging section (4-5) is provided with a sealing layer (4-3) matched with the outer wall of the holding clamp plate (1-1), the inner wall between one end, far away from the elastic grout stopping guide section (4-4), of the elastic grout stopping plugging section (4-5) and the sealing layer (4-3) forms a formwork body limiting groove (4-2) for accommodating the formwork body (2-1), one end, far away from the formwork everting connecting rod (2-3), of the formwork body (2-1) is abutted to the end face of the sealing layer (4-3), and the elastic grout stopping reserved section (4-6) is provided with an everting connecting rod limiting groove (4-1) matched with the formwork everting connecting rod (2-3).
5. The energy-saving tunnel advanced small conduit fast-assembling grout stopping structure according to claim 3, characterized in that: the outer wall of the elastic grout stopping piece (4) is provided with a plurality of rib rings (5) which are arranged in parallel along the length direction.
6. The energy-saving tunnel advanced small conduit fast-assembling grout stopping structure according to claim 5, characterized in that: the rib rings (5) are circular rings, and the widths of the rib rings (5) are equal.
7. The energy-saving tunnel advanced small conduit fast-assembling grout stopping structure according to claim 1, which is characterized in that: the outer wall of the rotary thrust sleeve (7) is of an outer hexagonal structure, and an observation window (9) for observing the length of the pushing bolt (6) is formed in the rotary thrust sleeve (7).
8. The energy-saving tunnel advanced small conduit fast-assembling grout stopping structure according to claim 1, which is characterized in that: the inner wall of the holding splint (1-1) is provided with a resistance layer (1-6) with a sawtooth structure.
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| CN202010879932.3A CN111927377B (en) | 2020-08-27 | 2020-08-27 | Energy-saving tunnel advanced small guide pipe quick-assembling grout stopping structure |
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| CN202010879932.3A CN111927377B (en) | 2020-08-27 | 2020-08-27 | Energy-saving tunnel advanced small guide pipe quick-assembling grout stopping structure |
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| CN111927377B true CN111927377B (en) | 2022-04-01 |
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| CN113062754B (en) * | 2021-04-27 | 2023-07-25 | 常凤琴 | Grouting end slurry stopping method for steel pipe grouting |
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| CN111927377A (en) | 2020-11-13 |
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