CN214363441U - Manual hole digging pile for karst area - Google Patents
Manual hole digging pile for karst area Download PDFInfo
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- CN214363441U CN214363441U CN202023348116.4U CN202023348116U CN214363441U CN 214363441 U CN214363441 U CN 214363441U CN 202023348116 U CN202023348116 U CN 202023348116U CN 214363441 U CN214363441 U CN 214363441U
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Abstract
The utility model relates to a karst area manual hole digging pile, include: the lap joint type cast-in-place concrete retaining wall formwork supporting system, the filling-free karst cave detachable internal-supporting formwork cavity pouring filling structure, the sealing cover, the water filling bag small-diameter differential blasting technology assembled integral type charging structure, the protection system and the novel anti-shaking slag-extracting barrel are adopted. The utility model has the advantages that: aiming at the working condition of no-filling karst cave, the inner and outer blocks of the supporting wood plates are connected to support and fill the karst cave, so that the stability of a temporary supporting system is ensured, the waste of concrete poured into the karst cave is reduced, and the construction efficiency is improved; the top sealing structure is arranged aiming at the working condition that the fluid mud fills the karst cave, so that the phenomenon of insufficient grouting is reduced, and the working efficiency of grouting construction is improved; through setting up in carrying auto-lock bucket roof beam and auto-lock buckle on sediment bucket upper portion, improved and carried the sediment bucket and in carrying the stability of sediment in-process that rises, further prevent that the dregs in the bucket from dropping, guaranteed hole bottom constructor's security.
Description
Technical Field
The utility model relates to a karst area manual hole digging pile belongs to pile foundation engineering field, the construction of the manual hole digging pile in specially adapted karst area.
Background
The manual hole digging pile is formed by manually digging, then placing a steel reinforcement cage, and pouring concrete to form a pile. Because the manual hole digging pile does not need large-scale instruments in the digging process, the manufacturing cost is much lower compared with pile forming modes such as punching of a percussion drill, drilling of a rotary drill, open caisson foundation and the like. However, when the karst geology is encountered, engineering technical problems such as pile verticality deviation, waste of a large amount of concrete due to cavity karst cave filling, incomplete chemical grouting filling of fluid slurry contained in the karst cave, damage of boulder blasting to temporary facilities in the pore and the like occur in the construction process of the manual hole digging pile.
Consequently, to these problems that meet in the actual construction engineering of karst area manual hole digging pile, it is necessary to develop one kind and can adapt to the manual hole digging pile of multiple karst operating mode, high, the security of efficiency of construction, the utility model discloses it just develops under such background and forms, must produce better economic and social benefit in being applied to the construction of actual manual hole digging pile.
SUMMERY OF THE UTILITY MODEL
The utility model aims at that the artifical bored pile pore-forming of karst area hangs down straightness not enough, the extravagant concrete of cavity solution cavity shutoff, the solution cavity contains that fluid mud chemical slip casting is incomplete, boulder blasting dado easily collapses and destroys interim facility in the drill way and carry the sediment bucket and rock the in-process and appear the sediment scheduling problem that falls in promoting, provide a artifical bored pile in karst area.
The manual hole digging pile in the karst area comprises an overlap joint type cast-in-place concrete retaining wall formwork supporting system, a filler-free karst cave detachable internal-supporting formwork cavity pouring hole filling structure, a sealing cover, a water filling bag filling small-diameter differential blasting technology assembled integral type powder filling structure, a protection system and a novel anti-shaking slag extracting barrel;
the lap joint type cast-in-place concrete dado formwork system comprises a welding steel bar, a steel bar socket, a steel plate and a transverse supporting steel bar; the steel plates are lapped through lapping steel bars, the joints of the steel plates are fixed through welding the steel bars, and the transverse supporting steel bars are inserted into steel bar sockets on the inner sides of the steel plates to form a supporting structure;
the cavity pouring and filling structure of the filler-free karst cave detachable internal-support template comprises an in-cave temporary support wood plate, a wood bar, a pile side support wood plate, slag soil and quick-setting concrete; an in-hole temporary supporting wood plate is arranged in the karst cave, one end of a wood bar is fixed on the temporary supporting wood plate through a screw, a pile side supporting wood plate is arranged at one end close to the pile, the other end of the wood bar is fixed with the pile side supporting wood plate through a screw, muck is piled on the inner side and the outer side of the pile side supporting wood plate, and rapid-hardening concrete is poured at the position of the in-hole temporary supporting wood plate;
the top of the lowest section of the protective wall is provided with a sealing cover, the sealing cover consists of four wooden ring frames and a central steel plate, the middle of the central steel plate is provided with a grouting hole and an air outlet, the air outlet is welded with a dense mesh steel wire mesh, and the wooden ring frames and the central steel plate are connected through bolts;
the integral charging structure and the protection system thereof are assembled by the water-filled bag minor-diameter differential blasting technology, the water bag, the explosive, the water bag and the stemming are sequentially arranged in the PVC pipe, and the detonator is arranged in the explosive to form the charging structure; the top of the lowermost wall protecting section is provided with a protective net which consists of four wooden ring frames and a dense mesh steel wire mesh, the wooden ring frames are connected with the dense mesh steel wire mesh through bolts, and rubber strips are stuffed between the wooden ring frames and the protective wall;
novel prevent rocking carry sediment section of thick bamboo including rings, spring, auto-lock bucket roof beam, auto-lock buckle and carry the sediment ladle body, the auto-lock bucket roof beam is installed on spring upper portion, and the auto-lock buckle with circle round the billet welding and in carrying the sediment bucket bung hole outside, auto-lock bucket roof beam lower edge cooperatees with auto-lock buckle and circle round the billet.
Preferably, the method comprises the following steps: the steel bar jacks are connected with the inner sides of the lapped steel bars through template grippers.
Preferably, the method comprises the following steps: the detonator is externally connected with a fuse.
The utility model has the advantages that:
(1) aiming at the working condition of no-filling karst cave, the karst cave is supported and filled by the supporting wood plates connected by the inner block and the outer block, so that the stability of a temporary supporting system is ensured, the waste of concrete poured into the karst cave is reduced, and the construction efficiency is improved;
(2) aiming at the working condition that the fluid mud fills the karst cave, the top sealing structure is arranged, so that the phenomenon of insufficient grouting is reduced, and the working efficiency of grouting construction is improved;
(3) aiming at the working condition of the boulder, the integral charging structure and the protection system thereof are assembled by adopting the small-diameter differential blasting technology of the water filling bag, and the water bag is arranged for damping in the boulder blasting process, so that the safety of blasting construction is ensured; and meanwhile, a top protective net with a short distance is arranged, so that the temporary facilities in the hole are prevented from being damaged by flying stones.
(4) Through setting up in carrying auto-lock bucket roof beam and auto-lock buckle on sediment bucket upper portion, improved and carried the sediment bucket and in carrying the stability of sediment in-process that rises, further prevent that the dregs in the bucket from dropping, guaranteed hole bottom constructor's security.
Drawings
FIG. 1 is a schematic view of a ground surface structure of a manual dug pile;
FIG. 2 is a schematic structural view of an anti-shaking slag extraction barrel;
FIG. 3 is a schematic view of a cavity-filling structure of a shaped detachable internal-bracing formwork without filler in a cavern;
FIG. 4 is a schematic view of a top closure structure of a cave filling fluid mud cave chemical guniting;
FIG. 5 is a schematic illustration of a boulder blast protection architecture;
FIG. 6 is a schematic illustration of a cross-sectional view of a boulder blast protection architecture;
FIG. 7 is a schematic structural view of an assembled integral charging and blast hole arrangement mode of a water-filled bag small-diameter differential blasting technology;
FIG. 8 is a schematic view of a lap joint cast-in-place concrete retaining wall formwork system;
FIG. 9 is a schematic view of a transverse support bar structure;
FIG. 10 is a schematic view of the upper support bar and the lower support bar installation;
FIG. 11 is a schematic perspective view of a formwork system for a lapped cast-in-place concrete retaining wall;
fig. 12 is an overall structure schematic diagram of a manual hole digging pile in a karst area.
Description of reference numerals: 1. the concrete grouting device comprises a winch, 2. a filler-free cave, 3. a concrete retaining wall, 4. a slag lifting barrel, 5. a water suction pump, 6. a first drainage hose, 7. a drainage steel pipe, 8. a locking notch fixing steel bar, 9. an orifice sizing hanger, 10. a steel wire rope, 11. a fixed pulley, 12. a motor, 13. a balancing weight, 14. an orifice drainage pipe fixing ring, 15. a drainage steel pipe joint, 16. a slag lifting barrel body, 17. a safety buckle, 18. a lifting ring, 19. a self-locking barrel beam, 20. a self-locking buckle, 21. a spring, 22. a barrel beam, 23. a convoluted steel bar, 24. a throat hoop, 25. a ladder stand, 26. an in-hole temporary support wood plate, 27. a pile side support wood plate, 28. a screw, 29. a slag separation cover, 30. a wood bar, 31. quick concrete, 32. a water collecting pit, 33. slag soil, 34. a second drainage hose, 35. a ring frame, 36. wood bolts, 37. a grouting hole, 38. the steel plate comprises a central steel plate, 39 air outlet holes, 40 dense mesh steel wire meshes, 41 boulders, 42 rubber strips, 43 PVC pipes, 44 water bags, 45 detonators, 46 explosives, 47 stemming, 48 fuse wires, 49 blank holes, 50 blast holes, 51 transverse supporting steel bars, 52 lapping steel bars, 53 steel plates, 54 welding steel bars, 55 formwork grippers, 56 steel bar sockets, 57 upper supporting steel bars and 58 lower supporting steel bars.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The utility model provides a manual hole digging pile in karst areas and a construction method, which mainly comprises an overlap joint type cast-in-place concrete dado supporting formwork system, a non-filler karst cave detachable internal support formwork cavity pouring filling hole, karst cave filler material matter mud karst cave side wall top closed static pressure chemical injection grouting, a water-filling bag small-diameter differential blasting technology assembled integral charging structure and a protection system thereof, an orifice shaped hanger underground water dynamic pumping and drainage system, a novel anti-shaking slag-lifting barrel and other systems, the overlap joint type cast-in-place concrete dado supporting formwork system adopts a steel welding shaped steel formwork, the non-filler karst cave adopts a detachable internal support wood formwork to temporarily support a concrete karst cave, the karst cave filler matter mud karst cave adopts side wall top closed static pressure chemical injection grouting, the boulder blasting adopts a water-filling bag small-diameter differential blasting technology assembled integral charging structure protection system thereof, the orifice-sizing hanger underground water dynamic pumping drainage system is used for rapid drainage in holes and is convenient for later-stage removal, and the novel anti-shaking slag extracting barrel adopts a double-barrel beam to improve the stability in the lifting process of the slag extracting barrel; the utility model relates to a system has good security, and the efficiency of construction is high, and adaptable manual hole digging pile has better economic technology benefit in the advantage of the different karst cave types in karst area.
Example one
The karst manual hole digging pile comprises an overlapped cast-in-place concrete retaining wall formwork supporting system, a filler-free karst cave detachable inner supporting formwork cavity pouring hole filling structure, a sealing cover, a water filling bag small-diameter differential blasting technology assembled integral type powder filling structure, a protective system and a novel anti-shaking slag extracting barrel;
the lap joint type cast-in-place concrete dado formwork system comprises a welding steel bar 54, a steel bar socket 56, a steel plate 53 and a transverse supporting steel bar 51; the steel plates 53 are overlapped through the overlapping steel bars 52, the joint of the steel plates is fixed through the welding steel bars 54, and the transverse supporting steel bars 51 are inserted into the steel bar sockets 56 on the inner sides of the steel plates 53 to form a supporting structure; the steel bar sockets 56 are connected with the inner sides of the lapping steel bars 52 through the template gripper 55; after the drill way excavation is finished, four overlap joint type steel templates are adopted for supporting the concrete retaining wall, and the joints of different steel templates are fixed by welding steel bars 54. Meanwhile, steel bar sockets 56 are arranged on the inner side of the steel formwork, and after the steel formwork is placed, the perpendicularity of the orifice retaining wall formwork is calibrated through four supporting steel bars 57 and 58.
The cavity pouring and filling structure of the filler-free karst cave detachable internal-support template comprises an in-cave temporary support wood plate 26, a wood bar 30, a pile side support wood plate 27, muck 33 and quick-setting concrete; an in-hole temporary support wood plate 26 is arranged in the karst cave, one end of a wood bar 30 is fixed on the temporary support wood plate 26 through a screw 28, a pile side support wood plate 27 is arranged at one end close to the pile, the other end of the wood bar 30 is fixed with the pile side support wood plate 27 through a screw 28, dregs 33 are piled on the inner side and the outer side of the pile side support wood plate 27, and quick-setting concrete 31 is poured at the position of the in-hole temporary support wood plate 26; when the manual hole digging pile encounters a karst cave without fillers, the temporary supporting wood plate 26 in the cave is cut according to the size of the karst cave, the wood rod 30 is firmly fixed on the temporary supporting wood plate 26 in the cave by using the screw 28, the temporary supporting wood plate 26 in the cave is placed into the karst cave to a certain depth, the pile side supporting wood plate 27 is arranged close to one end of the pile, the other end of the wood rod is fixed with the pile side supporting wood plate 27 by using the screw 28, and after the installation is finished, a small amount of muck 33 is stacked on the inner side and the outer side of the pile side supporting wood plate 27 to ensure the stability of the whole temporary supporting system of the karst cave. And pouring quick-setting concrete 31 into the temporary supporting wood plate 26 in the hole, building the concrete to form a certain gradient, and removing the wood plate 27 and the wood rod 30 fixed on the pile side when the concrete reaches a certain strength.
The top of the lowest section of the protective wall is provided with a sealing cover, the sealing cover consists of four wooden ring frames 35 and a central steel plate 38, the middle of the central steel plate 38 is provided with a grouting hole 37 and an air outlet hole 39, the air outlet hole is welded with a dense mesh steel wire mesh 40, and the wooden ring frames and the central steel plate are connected through bolts 36; when the manual hole digging pile meets the situation that the filler is a fluid slurry karst cave, a sealing cover is arranged on the top of the lowest section of the pile body which is finished with the protecting wall.
The integral charging structure and the protection system thereof are assembled by the water-filling bag minor-diameter differential blasting technology, the water bag 44, the explosive 46, the water bag 44 and the stemming 47 are sequentially arranged in the PVC pipe 43, the detonator 45 is arranged in the explosive 46, and the detonator 45 is externally connected with the fuse 48 to form the charging structure; the top of the lowermost wall protecting section is provided with a protective net which consists of four wooden ring frames 35 and a dense mesh steel wire mesh 40, the wooden ring frames 35 and the dense mesh steel wire mesh 40 are connected through bolts 36, and rubber strips 42 are inserted between the wooden ring frames and the protecting wall; when the manual hole digging pile meets boulders, the integral charging structure and the protection system thereof are assembled by adopting a water filling bag small-diameter differential blasting technology. The casing adopts PVC pipe 43, the detonator is non-electric millisecond detonator, and the explosive adopts emulsion explosive. The explosive charge is determined according to the size of the boulder on site of the blasthole, the blasthole is manufactured on the ground in advance, after the blasthole is drilled, the manufactured explosives are stuffed into the blasthole, the detonating network is connected in a cluster mode, and the detonating detonator is led to the ground surface by the detonating tube. A protective net is arranged at the top of the lowermost wall protecting section of the pile body, the protective net is composed of four wooden ring frames and a dense mesh steel wire mesh, and the wooden ring frames and the dense mesh steel wire mesh are connected through bolts. Meanwhile, the wooden ring frame and the protective wall are stuffed in the rubber strips for damping.
The novel anti-shaking slag lifting barrel comprises a lifting ring 18, a spring 21, a self-locking barrel beam 19, a self-locking buckle 20 and a slag lifting barrel body 16, wherein the self-locking barrel beam is installed on the upper portion of the spring 21, the self-locking buckle 20 and a convoluted steel bar 23 are welded on the outer side of a slag lifting barrel opening, and the lower edge of the self-locking barrel beam 19 is matched with the self-locking buckle 20 and the convoluted steel bar 23. After the slag lifting barrel finishes filling the slag soil, the self-locking barrel beam is pressed downwards to the convoluted steel bar 23, and then the self-locking buckle 20 is fixed through a knob.
Example two
In the embodiment, an integral charging structure and a protection system thereof, an orifice-shaped hanger underground water dynamic pumping and drainage system, a novel anti-shaking slag-extracting barrel and other systems are assembled by adopting a lap joint type cast-in-place concrete retaining wall formwork supporting system, a filler-free karst cave detachable inner supporting formwork cavity pouring filling hole, karst cave filler material slurry karst cave side wall top closed static pressure chemical injection grouting and water bag filling small-diameter differential blasting technology.
Overlap joint formula cast in situ concrete dado formwork system includes: overlap joint billet, welding billet, template tongs, billet socket, upper portion support billet, lower part support billet. After the hole is dug, installing a cast-in-place concrete retaining wall formwork, and respectively inserting the overlapped steel bars protruding from the four steel templates into the slotting joints reserved in the adjacent templates; then, the horizontal support steel bars are respectively inserted into the steel bar sockets, and the perpendicularity is calibrated through the upper and lower two-cross.
Filling material-free karst cave regularization detachable internal stay template cavity pouring filling hole includes: temporary supporting wood plates in the holes, pile side supporting wood plates, screws, wood rods, quick-setting concrete and muck. When the hole is dug until no filler karst cave exists, cutting the wood plate to form a temporary support plate in the karst cave on site according to the shape of the interior of the karst cave, and fixing the wood rod and the temporary support wood plate by using a screw; then, the pile side wood plate and the wood bar are respectively connected by screws, and after the connection is finished, a certain amount of muck is piled on the two sides of the pile side wood plate to fix the pile side supporting wood plate; spraying rapid-hardening concrete to the temporary support wood plate in the hole, and building the temporary support wood plate to form a certain gradient; and after the concrete is initially set, removing the residual soil, and removing the temporary supporting wood plate at the pile side to cut the wood bar. And further plugging the karst cave by using the rubber tube concrete according to the situation of plugging the karst cave.
Cave filler fluid mud cave top closed static pressure chemical injection grout includes: wooden ring frame, bolt, slip casting mouth, central steel sheet, venthole. When the hole is dug to meet a karst cave filled with fluid mud, the top is closed to carry out static pressure chemical injection grouting; the top sealing cover is arranged on the last annular protective wall which is constructed, four wooden annular frames are firstly installed and fixed by bolts respectively, after the construction is finished, rubber strips are stuffed between the annular frames and the protective wall, then a central steel plate is installed, and the central steel plate is provided with grouting holes and air outlet holes for welding dense mesh steel wire meshes.
Fill water bag minor diameter diff blasting technique equipment integral charge structure and protection system thereof includes: PVC pipe, water bag, detonator, explosive, stemming, fuse, hollow hole, blast hole, wooden ring frame, bolt and dense mesh steel wire net. When the manual hole digging pile meets the boulder, firstly cleaning up muck on the top of the boulder, then drilling a blast hole and a hollow hole by adopting an air drill, determining the explosive loading amount according to survey data, binding the explosive in advance on the ground according to the explosive loading structures of a water bag, the explosive, a detonator, the water bag and stemming, connecting the initiation network in a cluster mode, and leading the initiation detonator to the ground surface by using an initiation tube. The boulder blasting protection system is arranged on the last annular protection wall which is constructed, firstly two wooden annular frames are spliced, then the dense mesh steel wire mesh is arranged below the wooden annular frames through bolts, finally the two massive annular frames are spliced together through the bolts, and after the construction is finished, a rubber strip is stuffed between the annular frames and the protection wall.
The orifice sizing hanger underground water dynamic pumping and draining system is characterized in that a draining steel pipe 7 is arranged along a protection arm, the draining steel pipe 7 is connected through a draining steel pipe joint 15, the draining steel pipe joint 15 is fixed through a hose clamp 24, an orifice sizing hanger 9 is arranged at the orifice, the draining steel pipe 7 is fixed on the orifice sizing hanger 9 through an orifice draining pipe fixing ring 14, a locking fixing steel bar 8 used for fixing the draining steel pipe 7 is arranged at the upper part of the orifice sizing hanger 9, a first draining hose 6 is connected to the upper end of the draining steel pipe 7, and the first draining hose 6 is connected with a water suction pump 5. The lower end of the drainage steel pipe 7 is connected with a second drainage hose 34, and the second drainage hose 34 is provided with a slag separation cover 29 and is positioned in the sump 32.
The novel anti-shaking slag lifting barrel comprises a lifting ring, a self-locking barrel beam, a self-locking buckle, a spring, a barrel beam and a convoluted steel bar. The slag-lifting barrel body is provided with a barrel beam. The improved slag lifting barrel is improved on the traditional slag lifting barrel, a self-locking barrel beam with rotation is arranged below a safety buckle, and the device provides vertical force through a spring. When the self-locking bucket beam is used, the self-locking bucket beam is pressed downwards to the position of the rotary steel bar, and then the self-locking bucket beam is turned to the position of the self-locking buckle, so that the horizontal constraint of the slag lifting bucket is improved.
The motor 12 is connected with the fixed pulley 11 through a steel wire rope 10, a balancing weight 13 is arranged on a base of the motor 12, the lower end of the steel wire rope 10 is connected with a safety buckle 17 and a hanging ring 18, and the hanging ring 18 is connected with a novel anti-shaking slag lifting barrel. A ladder 25 is provided along the guard arm.
EXAMPLE III
As shown in fig. 1 to 11, the construction method of the artificial dug pile in the karst area provided by the utility model comprises the following steps in sequence:
firstly, measuring the position of a pile hole on site according to a design drawing, arranging 4 protective timber piles around the pile hole, excavating the first section to 70cm in depth, and erecting a formwork by adopting a vertical formwork. Pouring concrete to complete the construction of a first section of protective wall, and installing locking port fixing steel bars and central pile position calibration steel nails at the hole openings;
step two, installing surface equipment such as a winch 1, a balancing weight 13, a ladder stand 25, an orifice drain pipe fixing ring 14, a motor 12, a drain hose 6, a drain steel pipe 7, a water pump 5 and the like;
and step three, excavating lower sections at the hole openings, adopting a drainage hose 6 to lengthen a drainage steel pipe 7 before excavation, and enabling the excavation depth of each section to be 70 cm. After the excavation is finished, the steel templates are spliced, the lapping steel bars 52 are inserted into the reserved lapping seams, and the four steel templates are spliced into the retaining wall formwork. The lateral support bars are then inserted into the bar sockets 56, one above the other, in a cross. The perpendicularity of the formwork system is calibrated through the orifice calibration point, and when the perpendicularity of the wood plate is found to have deviation, the bottom of the steel formwork is additionally filled with slag or stone for adjustment. And after the adjustment is finished, pouring concrete to the outer side of the template, and removing the template after the concrete reaches certain strength.
Step four, the manually excavated dregs are transferred to the ground through the novel anti-shaking dreg lifting barrel 4. And after 2/3 is filled with the slag in the slag lifting barrel, the self-locking barrel beam 19 is pressed downwards to the rotary steel bar 23, the self-locking barrel beam 19 is twisted to the self-locking buckle 20, and the slag lifting barrel is lifted upwards. When dumping the dregs, the self-locking barrel beam 19 is reversely turned from the self-locking buckle 20, the self-locking barrel beam 19 rebounds to the top of the dregs lifting barrel, and the dregs in the dregs barrel are dumped at the moment.
And fifthly, when the karst cave 2 without the filler is encountered, firstly chiseling a top plate of the karst cave by using an air pick, then splicing the temporary supporting wood plates 26 in the karst cave according to the shape and size of the karst cave on site, and fixing the wood rods 30 and the temporary supporting wood plates 26 by using screws 28 after splicing. The temporary supporting wood board 26 is placed inside the karst cave through the wood rod 30, the pile side wood board 27 and the wood rod 30 are fixed through the screws 28 after the temporary supporting wood board 26 is placed inside the karst cave, and a certain amount of muck 33 is stacked on two sides of the pile side wood board 27 so as to achieve the effect of fixing the two wood boards. And then pouring rapid hardening concrete 31 to a certain gradient accumulation body on the temporary supporting wood plate in the hole. After the concrete reaches a certain strength, the pile side supporting wood plate 27 is removed, and the wooden rod 30 in the hole is cut as much as possible by adopting a handheld cutting machine. And (4) filling concrete in the incompletely closed pores to achieve the purpose of closing the karst cave. And then repeating the third step and the fourth step, and adopting a lap joint type cast-in-place concrete dado formwork supporting system to support a formwork and pour concrete until the design depth of the manual hole digging pile is reached.
And step six, when a karst cave filled with fluid mud is encountered, mounting a top sealing cover on the last annular protective wall which is constructed, mounting four wooden annular frames 35, fixing the four wooden annular frames by bolts 36 respectively, inserting a rubber strip 42 between the wooden annular frames 35 and the concrete protective wall 3 after the construction is finished, and mounting a central steel plate 38, wherein the central steel plate is provided with a grouting hole 37 and an air outlet 39 for welding a dense mesh steel wire mesh. And then, lowering a grouting pipe to the bottom of the karst cave, and spraying cement containing 3% of acrylate monomers into the karst cave. The top closing cap can guarantee when thick liquid grout turned over thick liquid to the closing cap, and the thick liquid is filled to both sides for can be fully filled by the thick liquid in the solution cavity, wait to excavate through the percussion drill again after the thick liquid condenses, repeat step three, four until reaching the design depth of manual hole digging pile.
And step seven, when boulders are encountered, firstly cleaning muck on the top of the boulders, then drilling blast holes and hollow holes by adopting an air drill, determining explosive loading according to survey data, binding the explosives in advance on the ground according to the explosive loading structures of a water bag 44, the explosives 46, a non-electric millisecond detonator 45, the water bag 44 and stemming 47, connecting the initiation network in a cluster mode, and leading the initiation detonator to the ground surface by using a detonating tube. The boulder blasting protection system is arranged on the last annular protection wall which is constructed, firstly two wooden annular frames are spliced, then the dense mesh steel wire mesh is arranged below the wooden annular frames through bolts, finally the two massive annular frames are spliced together through the bolts, and after the construction is finished, a rubber strip is stuffed between the annular frames and the protection wall.
The construction method is simple and easy to implement, the obtained manual hole digging pile is reliable in quality, and the method has the advantages of high construction efficiency, low cost, good safety and the like for karst areas, has good economic and technical benefits, and is suitable for popularization and application.
Claims (3)
1. The utility model provides a manual hole digging pile in karst area which characterized in that: the method comprises an overlap joint type cast-in-place concrete dado formwork supporting system, a filler-free karst cave detachable internal support template cavity pouring filling structure, a sealing cover, a water filling bag filling small-diameter differential blasting technology assembled integral type charging structure, a protection system and a novel anti-shaking slag extracting barrel;
the lap joint type cast-in-place concrete dado formwork system comprises a welding steel bar (54), a steel bar socket (56), a steel plate (53) and a transverse supporting steel bar (51); the steel plates (53) are overlapped through overlapping steel bars (52), the joint of the steel plates is fixed through welding steel bars (54), and the transverse supporting steel bars (51) are inserted into steel bar sockets (56) on the inner sides of the steel plates (53) to form a supporting structure;
the cavity pouring and filling structure of the filler-free karst cave detachable internal-support template comprises an in-cave temporary support wood plate (26), a wood bar (30), a pile side support wood plate (27), muck (33) and quick-setting concrete; an in-hole temporary support wood plate (26) is arranged in the karst cave, one end of a wood bar (30) is fixed on the temporary support wood plate (26) through a screw (28), a pile side support wood plate (27) is arranged at one end close to the pile, the other end of the wood bar (30) is fixed with the pile side support wood plate (27) through the screw (28), muck (33) is piled on the inner side and the outer side of the pile side support wood plate (27), and quick-setting concrete (31) is poured at the position of the in-hole temporary support wood plate (26);
the top of the lowest section of the protective wall is provided with a sealing cover, the sealing cover consists of four wooden ring frames (35) and a central steel plate (38), the middle of the central steel plate (38) is provided with a grouting hole (37) and an air outlet hole (39), the air outlet hole is welded with a dense mesh steel wire mesh (40), and the wooden ring frames and the central steel plate are connected through bolts (36);
the integral charging structure and the protection system thereof are assembled by the water-filling bag small-diameter differential blasting technology, the water bag (44), the explosive (46), the water bag (44) and the stemming (47) are sequentially arranged in the PVC pipe (43), and the detonator (45) is arranged in the explosive (46) to form the charging structure; the top of the lowermost wall protecting section is provided with a protective net which consists of four wooden ring frames (35) and dense mesh steel wire meshes (40), the wooden ring frames (35) and the dense mesh steel wire meshes (40) are connected through bolts (36), and rubber strips (42) are inserted between the wooden ring frames and the protective wall;
the novel anti-shaking slag lifting barrel comprises a lifting ring (18), a spring (21), a self-locking barrel beam (19), a self-locking buckle (20) and a slag lifting barrel body (16), wherein the self-locking barrel beam is installed on the upper portion of the spring (21), the self-locking buckle (20) and a convoluted steel bar (23) are welded on the outer side of a slag lifting barrel opening, and the lower edge of the self-locking barrel beam (19) is matched with the self-locking buckle (20) and the convoluted steel bar (23).
2. The karst area manual hole digging pile of claim 1, wherein: the steel bar sockets (56) are connected with the inner sides of the lapped steel bars (52) through template grippers (55).
3. The karst area manual hole digging pile of claim 1, wherein: the detonator (45) is externally connected with a fuse (48).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023348116.4U CN214363441U (en) | 2020-12-31 | 2020-12-31 | Manual hole digging pile for karst area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023348116.4U CN214363441U (en) | 2020-12-31 | 2020-12-31 | Manual hole digging pile for karst area |
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| CN214363441U true CN214363441U (en) | 2021-10-08 |
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