A kind of high-pressure rotary jet grouting pile machine
Technical field
The utility model relates to a kind of pile foundation equipment, particularly relates to a kind of high-pressure rotary jet grouting pile machine that uses in highrise building and subway engineering that is applicable to.
Background technology
In modern high-rise building and subway engineering, the stake machine is indispensable equipment.Just be widely used as long screw pile machine, though can satisfy the work of highrise building and metro engineering pile foundation, but its weak point: can not once get into the position, following bore need repeatedly frequent jointed rod midway, when extracting, also want one section one section ground dismounting drilling rod, time-consuming, operative employee's labour intensity is also very big, and can only be after extracting whole drilling rods could cast-in-place pile foundation, cast-in-place concrete can not be made firm by ramming, the pile foundation quality instability.
The utility model content
The purpose of this utility model is to overcome deficiency of the prior art, and providing a kind of can put in place in disposable boring, again can be in extracting the process of drilling rod, on one side cast-in-place one side make the high-pressure rotary jet grouting pile machine of pile foundation cast-in-situ concrete firm by ramming.
The purpose of this utility model is achieved by following technical proposals: comprise frame, drill bit, drilling rod, hoisting mechanism, drilling rod power set and water, gas, concrete rainer; Described drill bit and drilling rod are the one hollow-core construction; Described drilling rod is installed drilling rod gear and drilling rod power set, driven wheel on the output shaft of the motor of drilling rod power set and drilling rod gears engaged away from an other end of drill bit; The drilling rod inside of described hollow-core construction be equipped with can only with drilling rod rise or descend but three pipe fittings and the support member thereof that can not rotate with drilling rod; Described three pipe fittings and support member thereof comprise three pipe fittings, slide block and supporters; The upper end of described three pipe fittings is provided with the slide block of fixing three pipe fitting positions, and the below of slide block is provided with boss, between the inwall of boss and drilling rod bearing is installed; The lower end of described three pipe fittings is provided with the supporter of fixing three pipe fitting positions, between supporter and the drilling rod inwall bearing is installed; Described three pipe fittings are connected by pipeline with water, gas, concrete rainer respectively; The top of described slide block also is provided with the wire rope seat that is connected with the wire rope of hoisting mechanism; One side of described frame is provided with guide rail, and the top of guide rail is a unenclosed construction, and guide rail is provided with the drilling rod guide holder near the position of frame bottom; The drill bit of described hollow-core construction and supporter constitute mixing chamber; The spray-hole that at least one is communicated with mixing chamber is set on the shell of the drill bit of described hollow-core construction.
The quantity of described spray-hole is during greater than one, and they are distributed on the different horizontal sections.
Between described slide block and the supporter, the support member that at least one is used to increase by three pipe fitting torsional stiffnesies is set.
The automatically controlled part of the automatically controlled part of described hoisting mechanism, the automatically controlled part of drilling rod power set and water, gas, concrete rainer is electrically connected on the central controller.
The cutting tip of at least two similar screws is set on the outer wall of described drill bit.
Described frame can dispose hydraulic travel system or other power-actuated running gears.
Compared with prior art, the utlity model has simple and reasonablely, can realize intellectualized operation, cast-in-place pile foundation quality is good, and high efficiency can also be saved advantages such as cost and energy consumption simultaneously.
Description of drawings
Fig. 1 is the utility model one embodiment organigram;
Fig. 2 analyses and observe enlarged diagram for the A-A of Fig. 1;
Fig. 3 is the B-B section enlarged diagram of Fig. 1;
Fig. 4 analyses and observe enlarged diagram for the C-C of Fig. 1;
Among the figure: 1-frame, 2-mixing chamber, 3-drill bit, 4-supporter, 5-drilling rod guide holder, 6-drilling rod, 7-drilling rod gear, 8-slide block.The 9-hoisting mechanism.The 10-tracheae, 11-water pipe, 12-concrete pipe, 13-drilling rod power set, 14-air compressor machine, 15-water pump, 16-concrete pump, 17-guide rail, 18-wire rope seat, 19-spray-hole.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
With reference to accompanying drawing, the utility model comprises frame 1, drill bit 3, drilling rod 6, hoisting mechanism 9, drilling rod power set 13 and water, gas, concrete rainer; Described drill bit 3 and drilling rod 6 are the one hollow-core construction; Described drilling rod 6 is installed drilling rod gear 7 and drilling rod power set 13 away from an other end of drill bit 3, driven wheel on the output shaft of the motor of drilling rod power set 13 and 7 engagements of drilling rod gear; Drilling rod 6 inside of described hollow-core construction be equipped with can only with drilling rod 6 rise or descend but can not be with three pipe fittings and the support member thereof of drilling rod 6 rotations; Described three pipe fittings and support member thereof comprise three pipe fittings, slide block 8 and supporter 4; The upper end of described three pipe fittings is provided with the slide block 8 of fixing three pipe fitting positions, and the below of slide block 8 is provided with boss, between the inwall of boss and drilling rod 6 bearing is installed; The lower end of described three pipe fittings is provided with the supporter 4 of fixing three pipe fitting positions, between supporter 4 and drilling rod 6 inwalls bearing is installed; Described three pipe fittings are connected by pipeline with water, gas, concrete rainer respectively; The top of described slide block 8 also is provided with the wire rope seat 18 that is connected with the wire rope of hoisting mechanism 9; One side of described frame 1 is provided with guide rail 17, and the top of guide rail 17 is a unenclosed construction, and guide rail 17 is provided with drilling rod guide holder 5 near the position of frame 1 bottom; The drill bit 3 of described hollow-core construction constitutes mixing chamber 2 with supporter 4; The spray-hole 19 that at least one is communicated with mixing chamber 2 is set on the shell of the drill bit 3 of described hollow-core construction.
With reference to accompanying drawing 4, the quantity of described spray-hole 19 is during greater than one, and they are distributed on the different horizontal sections.Preferred three spray-holes 19 cut open by ladder at accompanying drawing 4 and to show this three spray-holes 19 simultaneously.
Between described slide block 8 and the supporter 4, the support member that at least one is used to increase by three pipe fitting torsional stiffnesies is set.Preferred every meter is provided with a support member.
The automatically controlled part of the automatically controlled part of described hoisting mechanism 9, the automatically controlled part of drilling rod power set 13 and water, gas, concrete rainer is electrically connected on the central controller.
The cutting tip of at least two similar screws is set on the outer wall of described drill bit 3.Preferred three cutting tips.
Described frame 1 can dispose hydraulic travel system or other power-actuated running gears.
The capital equipment of described water, gas, concrete rainer is air compressor machine 14, water pump 15 and concrete pump 16.
Embodiment is an example with 26 meters dark pile foundations.
According to pile foundation dark 26 meters at the scene assembling design make frame 1, and assembled on site guide rail 17, hoisting mechanism 9 and water, gas, concrete rainer.Drilling rod guide holder 5 is installed in the below of guide rail 17.
According to the dark 26 meters drilling rods 6 of assembling the hollow-core construction of respective length at the scene of pile foundation, interior bearing by two ends at drilling rod 6 is installed three pipe fittings and support member thereof, the drilling rod power set 13 of drilling rod gear 7 being installed and being complementary with it in the upper end of drilling rod 6, the slide block 8 of said modules is inserted in the guide rail 17, after drilling rod guide holder 5 was passed in the lower end of drilling rod 6, the drill bit 3 that will have the cutting tip of similar screw was welded on the lower end of drilling rod 6.Water, gas, concrete rainer are connected to three pipe fittings in the drilling rod 6 by flexible pipe.
Water, gas, concrete rainer also can be installed on the frame 1, are convenient to interior moving.
Other install connection and dismounting repeats no more.
Operating principle:
Boring continuously: a pile foundation is once holed and is put in place, does not need to splice drilling rod midway.In boring procedure, the cutting tip of similar screw just changes, the downward strength of drilling rod is given at the inclination angle of cutting tip, add other equipment combined with drilling rod and the deadweight of component, can quicken the downward strength of drilling rod, inject water under high pressure from spray-hole 19 ejections, accelerate the one-time-reach-place of boring progress.In the present embodiment, drilling rod is just changeing subsidence velocity: 1~3m/min.
Cast-in-place making firm by ramming: when extracting drilling rod, do not need dismounting drilling rod.In extracting the drilling rod process, drilling rod is reversed to the master, the strength that the inclination angle of cutting tip makes progress to drilling rod, and hoisting mechanism 9 cooperates the lifting drilling rod, and in the present embodiment, hoisting velocity is 1m/min, and the concrete flow is 150L/min.When rising to predetermined height, just changeing drilling rod again, wire rope is loosened in hoisting mechanism 9 cooperations, and in the present embodiment, subsidence velocity is 1m/min.When sinking to predetermined height, the drilling rod that reverses again promotes, and in the present embodiment, hoisting velocity is 1m/min, and flow is 150L/min.Promote so repeatedly and sink, cast-in-place in 100 centimetres of every liftings in the present embodiment, in 50 centimetres of every sinkings, make water spray firm by ramming.The high pressure fine injection stream that water pump 15 produces, have powerful cutting power, add the dissection of cutting tip, can guarantee that the concrete cement paste that sprays can cut the hard soil body all around, mix with it, form columned cement and add solid with soil mixes.By this soil improvement, the shear strength of the soil body is greatly enhanced, prevent the water softening of eluvium chance, to guarantee its supporting capacity, to have ensured that space enclosing structure has reliable buried depth, prevents that space enclosing structure and permanent structure from surpassing limit deformation.
The water under high pressure that produces with water pump 15 directly washes mixing chamber 2 and spray-hole 19, and compressed air purge mixing chamber 2 and the spray-hole 19 of using air compressor machine 14 to produce again are in case concrete coagulation stops up mixing chamber 2 and spray-hole 19.
Above-mentioned everything can come Based Intelligent Control by the central controller that specific software is housed.Except concrete needed to add in addition, other work can be operated realization by a people.
Bored and a cast-in-place pile foundation after, move boring and the cast-in-place work that next pile foundation is carried out in top operation that once repeats inside.
Major advantage:
1, drilling rod pierce and extract splicing repeatedly and the dismounting that does not need drilling rod, saving of work and time has been saved a large amount of non-cutting times, speeds up the work, and has significantly reduced operative employee's labour intensity simultaneously.
2, cast-in-place pile foundation when extracting drilling rod can also be made firm by ramming, the pile foundation quality height.
3, when extracting drilling rod because the strength that the inclination angle of cutting tip makes progress to drilling rod can reduce the power consumption of hoisting mechanism 9, energy savings.
4, the intelligent control of software can realize that the operation of one man operation or single pile foundation realizes unmanned.
5, heavier owing to self fuselage, that the power foot is stablized continuation is good, so moment of torsion is big, more guaranteed for rate of penetration in the relatively hard geological stratification.
6, frame 1 configuration hydraulic travel system or other power-actuated running gears are saved time aspect displacement, stake in place greatly.
In sum, no matter jet grouting pile driving machine of the present utility model is construction quality or economic benefit in Practical Project, and effect is all very obvious, and can also speed up the work, and reduces labour intensity, energy savings consumption.