Summary of the invention:
The purpose of this invention is to provide carry on a kind of stir expand the end automatically the boring slip casting of control stir and expand base pressure concrete placing method and device thereof.
Above-mentioned purpose realizes by following technical scheme:
Boring slip casting is stirred and is expanded base pressure concrete placing method, when rig creeps into, in drilling rod core pipe, inject cement paste by the grouting pipeline that is located on the bend pipe, when getting into projected depth, start the hydraulic jack that is arranged on unit head top, the anti-swiveling head pulling wire rope of twisting by the hydraulic cylinder piston rod lower end, drive convertible drill bit upset, after the diameter of upset exceeds drill pipe diameter and reaches designing requirement, the limit is carried on the rotation expansion base, when the upset drill bit stirs the sand layer of stake end and cement paste after the expansion end reaches design height, hydraulic jack is regained the upset drill bit and is stopped to stir the expansion end, and backmost the guncreting limit is carried and is drilled to stake.
Expansion base pressure concrete placing method is stirred in above-mentioned boring slip casting, injects concrete when the end is expanded in stirring separately and stirs into expansion end pile.
Expansion base pressure concrete placing method is stirred in above-mentioned boring slip casting, injects cement paste when the end is expanded in stirring separately and stirs expansion end pile.
Above-mentioned boring slip casting is stirred and is expanded base pressure concrete placing method, when finish expand the end stir carry the drilling rod guncreting in the rotation after, in the sand layer, do not regain the upset drill bit, pile body forms screw thread.
Above-mentioned boring slip casting is stirred and is expanded base pressure concrete placing method, this method slip casting when dried operation pore-forming is stirred and is expanded the end and finish, and proposes cast pile concrete pile behind the drilling rod, all injects cement pastes when wet trade, after finishing the stirring expansion end, propose drilling rod, insert reinforcing cage and throw in the rubble pile.
The mixing plant that expands the base pressure concrete placing is stirred in the boring slip casting that above-mentioned method is used, its composition comprises: unit head, connected drilling rod, be connected with hydraulic jack and concrete pipeline on the described unit head, be connected with grouting pipeline on the described concrete pipeline, be connected with the anti-swiveling head of twisting that the lower end connects wire rope on the described hydraulic jack, be connected with the upset drill bit on the described wire rope, be welded with the brill leaf on the described drilling rod, antitorque clamping plate are equipped with in the end, lower end of described drilling rod, and described drilling rod bottom is bored on the leaf and is welded with reaction plate.
The mixing plant that expands the base pressure concrete placing is stirred in above-mentioned boring slip casting, and described wire rope and described drilling rod rotate synchronously.
The mixing plant that expands the base pressure concrete placing is stirred in above-mentioned boring slip casting, and described wire rope replaces with reinforcing bar or shaped steel.
The mixing plant that expands the base pressure concrete placing is stirred in above-mentioned boring slip casting, and shape or triangle or trapezoidal are harrowed in being shaped as of the apex point of described upset drill bit.
The mixing plant that expands the base pressure concrete placing is stirred in above-mentioned boring slip casting, and described wire rope is contained in the outside or the inboard of described drilling rod core pipe.
This technical scheme has following beneficial effect:
1. the present invention utilizes the upset of convertible drill bit to exceed drill pipe diameter to reach the unidirectional rotation reaming of intended diameter, switching process spurs wire rope by oil cylinder, surpass drill pipe diameter at the convertible drill bit of pulling and finish the expansion end and cement paste or concrete stirring, enlarged end resistance area, improved bearing capacity of single pile.
2. the inventive method is simple in structure, operation easily, and reliable in quality, speed of application is fast, and the every pile overall process of this method only need once be crept into and be proposed to finish slip casting stirring expansion base pressure concrete placing, has wide practical use.
3. proposing the stirring expansion on the inventive method has been finished has automatic control system to control automatically expanding the end and stirring during the end, guaranteed expansion substrate amount.
4. its drill bit of device of using of the inventive method is convertible drill bit, by the upset drill bit sand layer of stake end and cement paste is stirred during work and expands the end and reach design height, and the drill bit structure that overturns is simple, and volume is little can not to influence the speed of creeping into.
5. use this job practices to construct, bearing capacity of single pile is increased, because when on finishing the stirring of the expansion end, carrying the drilling rod guncreting, operation can not regain drill bit, unit head slow-speed of revolution rotation, last pressure-raising concrete placing in the sand layer, pile body can form screw thread, improve bearing capacity of single pile, and the cost of this method is lower, can create very big economic benefit.
The specific embodiment of the present invention:
Embodiment 1:
Boring slip casting is stirred and is expanded base pressure concrete placing method, when rig creeps into, in drilling rod core pipe, inject cement paste by the grouting pipeline that is located on the bend pipe, when getting into projected depth, start the hydraulic jack that is arranged on unit head top, the anti-swiveling head pulling wire rope of twisting by the hydraulic cylinder piston rod lower end, drive convertible drill bit upset, after the diameter of upset exceeds drill pipe diameter and reaches designing requirement, the limit is carried on the rotation expansion base, when the upset drill bit stirs the sand layer of stake end and cement paste after the expansion end reaches design height, hydraulic jack is regained the upset drill bit and is stopped to stir the expansion end, and backmost the guncreting limit is carried and is drilled to stake.
Embodiment 2:
Expansion base pressure concrete placing method is stirred in embodiment 1 described boring slip casting, injects concrete when the end is expanded in stirring separately and stirs expansion end pile.
Embodiment 3:
Expansion base pressure concrete placing method is stirred in embodiment 1 or 2 described boring slip castings, injects cement paste when the end is expanded in stirring separately and stirs expansion end pile.
Embodiment 4:
Embodiment 3 described boring slip castings are stirred and are expanded base pressure concrete placing method, when on finishing the stirring rotation of the expansion end, carrying the drilling rod guncreting, and after carrying the drilling rod guncreting, in the sand layer, do not regain the upset drill bit, the screw thread pile body can be formed when carrying in the rotation, the bearing capacity of stake can be improved.
Embodiment 5:
Embodiment 4 described boring slip castings are stirred and are expanded base pressure concrete placing method, this method slip casting when dried operation pore-forming is stirred and is expanded the end and finish, propose to pour into a mould the pile concrete pile behind the drilling rod, when wet trade, all inject cement paste, after finishing the stirring expansion end, propose drilling rod, insert reinforcing cage and throw in the rubble pile.
Embodiment 6:
The mixing plant that expands the base pressure concrete placing is stirred in the boring slip casting that embodiment 1 described method is used, its composition comprises: unit head 1, connected drilling rod 5, be connected with hydraulic jack 6 and concrete pipeline 3 on the described unit head 1, be connected with grouting pipeline 4 on the described concrete pipeline 3, be connected with the anti-swiveling head 7 of twisting that the lower end connects wire rope 8 on the described hydraulic jack 6, be connected with the upset drill bit on the described wire rope, be welded with on the described drilling rod 5 and bore leaf 12, antitorque clamping plate 10 are equipped with in the end, lower end of described drilling rod 5, and described drilling rod bottom is bored on the leaf and is welded with reaction plate 11.Antitorque clamping plate 10 opposing rotary torsions have been protected upset drill bit 9 when the upset of upset drill bit 9, and the drill bit 9 that prevents to overturn fractures in the process of work, and it is opposite with upset drill bit 9 opening directions within 1 meter on upset drill bits 9 drill bits that reaction plate 11 is welded on drilling rod 5.
Embodiment 7:
The mixing plant that expands the base pressure concrete placing is stirred in embodiment 6 described boring slip castings, and described wire rope 8 rotates synchronously with described drilling rod 5.
Embodiment 8:
The mixing plant that expands the base pressure concrete placing is stirred in embodiment 7 or 6 described boring slip castings, and described wire rope 8 usefulness reinforcing bars or shaped steel replace.
Embodiment 9:
The mixing plant that expands the base pressure concrete placing is stirred in embodiment 8 described boring slip castings, and shape or triangle or trapezoidal are harrowed in being shaped as of the apex point of described upset drill bit 9.
Embodiment 10:
The mixing plant that expands the base pressure concrete placing is stirred in embodiment 9 described boring slip castings, and described wire rope 8 is contained in the outside or the inboard of described drilling rod 5 core pipes.