CN201851001U

CN201851001U - Drilling machine for constructing piles with high bearing capacity

Info

Publication number: CN201851001U
Application number: CN2010205880823U
Authority: CN
Inventors: 李贵堂; 夏树清
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-22
Filing date: 2010-10-21
Publication date: 2011-06-01
Anticipated expiration: 2020-10-21

Abstract

The utility model provides a drilling machine for constructing piles with high bearing capacity, and aims to eliminate weak soil at the ends of piles and the constructing foundation piles in corresponding structure by means of casting first and then grouting through the same equipment according to different geological conditions. The drilling machine comprises a power assembly and a screw drill stem, the screw drill stem is in power connection with the power assembly, a hydraulic cylinder is arranged in the power assembly, a cement grout pumping pipe is arranged at the upper end of a barrel of the drill stem, a sealing gate is arranged at the lower end of the barrel of the drill stem, a cement grout outlet is closed by means of moving the sealing gate downwards and is opened by means of moving the sealing gate upwards, and the lower end of a hydraulic power rod of the hydraulic cylinder is hinged to an operating link of the sealing gate. According to the technical scheme, the drilling machine eliminates weak soil at the ends of the piles, increases pile end bearing capacity and single pile bearing capacity, and can be used for constructing expanded bore piles, mixed expanded bore piles and screwed piles in different types.

Description

Construct the rig of high-bearing stake

Technical field

The utility model relates to the drilling apparatus of constructing building pile foundation by spiral drilling machine.

Background technology

The method that existing foundation pile adopts is under spiral drilling machine behind the drilling to completion, and the drilling rod limit is carried to the stake of boring guncreting basis of formation in the limit.When carrying on the drilling rod, the suitable helical duct landing between helical blade up and down of drill rod end soil property becomes loosened soil at the bottom of the hole, and the existence of loosened soil has had a strong impact on end bearing pile bearing technology performance.Prior art has provided some technical schemes and has solved loosened soil at the bottom of the hole to pile capacity, particularly at the harmful effect of end bearing pile bearing capacity, a kind of solution wherein is to treat to inject cement paste by a high-voltage tube high pressure after guncreting reaches certain state of cure, the negative effect that loosened soil exists that weakens of method by filling, strengthen the stake end and improve pile capacity, guarantee quality of pile, but as long as loosened soil physical presence still, this method will be subjected to great limitation on the raising of power is carried in stake.In addition, its process is comparatively complicated, and the processing time is long, and the long tube structure of high pressure ascending pipe at the bottom of probeing into, and easily stifled, also inconvenience cleaning also need be provided with anti-slew gear, and disposable staying in the pile body, and the overall cost cost is higher.

Chinese patent discloses the another kind of technical scheme that expands the end, stirs with cement paste or concrete of following in pile grouting, its purpose is mainly to guarantee the bearing capacity of single pile of foundation pile in mode at the bottom of the expansion of enlarged portion resistance area.This technical scheme is the upset drill bit by drilling rod bottom tube mouth place, and when drilling rod core pipe was opened in the drill bit upset, the rotation maximum gauge of upset drill bit expanded at the end so that stir in turn greater than the auger stem diameter.In the practical operation, drilling rod needs to promote earlier about 20 centimetres so that upset drill bit upset space to be provided, this operation can't be avoided the loosened soil by the helical duct landing, and loosened soil mixes in slip casting or presses in the concrete of irritating, and its pile capacity just is difficult to satisfy the technical requirements of end bearing pile bearing capacity; In addition, existing spiral drilling machine can only be realized the foundation pile construction of single structure form, can't select corresponding process to build more suitable foundation pile at different geological conditionss.

Summary of the invention

Goal of the invention of the present utility model be to provide a kind of eliminate a stake end loosened soil, again with first slip casting irritate concrete thereafter, according to the rig of constructing the high-bearing stake of implementing to make up the foundation pile of counter structure form under the different geological conditionss by an equipment.The drilling rig technique scheme of constructing the high-bearing stake that the utility model provides, its major technique content is: a kind of rig of constructing the high-bearing stake, comprise the auger stem that power assembly is connected with power assembly power, be provided with hydraulic cylinder in the power assembly, drilling rod core pipe upper end is provided with slurry concrete pumping tube connector, drilling rod core pipe lower end is provided with down transfer sealing pulp concrete mouth, goes up and transfer the closing door of opening pulp concrete mouth and sealing helical duct, and the hydraulic power bar lower end of hydraulic cylinder is hinged on the closing door control link.

In above-mentioned overall plan, described slurry concrete pumping tube connector comprises Grouting Pipe and pump concrete pipe, and Grouting Pipe wherein and drilling rod core pipe upper end is provided with check valve in the go side mutually, in case during the pump concrete by the Grouting Pipe adverse current.

The technical scheme of the rig of constructing the high-bearing stake that the utility model provides, its technological merit is:

1, in the closing door buckling state with after being drilled into design elevation under the rig, last carry drilling rod before the hydraulic power bar of primer fluid cylinder pressure at first, driving closing door upwards transfers until the helical blade place, open the drilling rod core pipe mouth of pipe and stop helical duct, soil property is skidded off the situation that forms loosened soil when so just having avoided carrying drilling rod fully by helical duct, concrete by cement paste that injects and pressure filling is again constructed a bottom, be easy under complex geological conditions more, realize the end bearing pile of high-bearing technical standard, improved bearing capacity of single pile; With first slip casting concrete placing more thereafter, consolidate side soil by cement paste, thereby increase the stake resistance of stake end and side hinders comprehensively;

2, in the technical program structure, the upper and lower transfer requisite space of closing door is minimum, mainly contact with bottom outlet edge soil property with cut-in type, its power minimum that is hampered, so hydraulic mechanism can have the drivability of good position transfer to closing door, be easy to accurately closing door is positioned the desired position, handling good;

3, the rig of originally constructing the high-bearing stake can be realized multi-form expanded bore pile, stir expanded bore pile and helical burr ram.Behind the drilling to completion, when keeping this degree of depth rotation, closing door is opened on the limit under the drilling rod, and cement paste is injected by drilling rod core pipe in the limit, promptly forms spherical the expansion at the end at the bottom of the hole, constitutes expanded bore pile; Or, under drilling rod behind the drilling to completion, closing door is passed to the centre position, at this moment the radius of gyration of closing door is greater than the radius of gyration of auger stem, in the scope about a meter at the bottom of the distance hole, up and down reciprocatingly spur drilling rod and drive closing door, slip casting simultaneously or guncreting are then finished the operation of stirring expanded bore pile in rotation with up and down reciprocatingly; Or behind the drilling to completion, closing door is passed to the centre position under drilling rod, and at this moment the radius of gyration of closing door is greater than the radius of gyration of auger stem, and drilling rod limit guncreting is carried on the limit in this state, just can form helical burr ram, increases the resistance of foundation pile side grinding.

Description of drawings

Fig. 1 is a general assembly constructional drawing of originally constructing the rig of high-bearing stake

Fig. 2 is the principles of construction figure of drilling rod lower end

Fig. 3 and Fig. 4 are respectively the formation schematic block diagrams of two kinds of expanded bore piles

Fig. 5 is that helical burr ram forms schematic diagram.

The specific embodiment

The rig of constructing the high-bearing stake that the utility model provides, its structure as depicted in figs. 1 and 2, comprise power assembly 1, power assembly 1 is in transmission connection and is provided with auger stem 3, auger stem core pipe 2 upper ends are provided with slurry concrete pumping tube connector, in the present embodiment, slurry concrete pumping tube connector comprises Grouting Pipe 4 and pump concrete pipe 5, and auger stem core pipe 2 lower ends are provided with down transfer sealing pulp concrete mouth 7, go up and transfer the closing door of opening pulp concrete mouth and sealing helical duct.In the structure as shown in Figure 2, the lower end of auger stem 3 is conical drill bit 8, the symmetrical side of this taper shape drill bit 8 is provided with two pulp concrete mouths 7, closing door 6 rotating shafts are fixedly installed on the auger stem 3, control link 9 inner hydraulic power bar 10 lower ends with hydraulic cylinder 12 of fixedlying connected with closing door 6 are articulated and connected, and hydraulic power bar 10 upper ends are provided with anti-revolution lift lug 16; Perhaps as Fig. 3, Fig. 4 and shown in Figure 5, the auger stem core pipe mouth of pipe one radially position is provided with drill bit plate 11, handles structure equally in 11 liang of symmetrical sides of drill bit plate and is provided with closing door 6, two closing doors 6 and drill bit plate 11 common drill bits of constructing vertex (vertices)s.Closing door 6 has corresponding angle with control link 9, thereby makes when beginning a new line journey in the driving of hydraulic power bar 10, drives the final sealing pulp concrete mouth 7 that coincide of 6 times transfers of closing door, the operating state when being suitable for brill drilling rod under; When the driving of hydraulic power bar 10 presses down stroke, make closing door 6 upwards be passed to the helical duct place of helical blade gradually, stop and add the plug soil property in the helical duct and glide and become loosened soil, combine with the slip casting of stake bottom, the pile body guncreting forms whole pile body; Or hydraulic power bar 10 promotes the interposition of closing doors 6 between being in up and down, when this position, the maximum radius of gyration of closing door 6 surpasses the radius of gyration of auger stem 3, in this state, can form helical burr ram as shown in Figure 5, i.e. rotary lifting auger stem under this state, guncreting promptly forms helical burr ram 13 simultaneously; Also can be as shown in Figure 3, still keep rotation during 3 times drilling to completions of auger stem, the upwards transfer gradually of hydraulic power bar 10 drive closing doors 6 this moment, and simultaneously by Grouting Pipe 4 through auger stem core pipe 2 to the hole rising pouring go into cement paste, promptly form spherical the expansion at the end 14 at bottom orifice, after this guncreting is again irritated under the pressure extrusion in the coagulation soil pressure, the cement paste complete filling, consolidate with side soil and to combine, improved the bearing capacity of single pile that integral end is held foundation pile with this; Also can be as shown in Figure 4, still keep rotation during 3 times drilling to completions of auger stem, at this moment hydraulic power bar 10 limits drive closing door 6 and upwards are passed to the by-level position gradually, on one side by Grouting Pipe 4 through auger stem core pipe 2 to the hole rising pouring go into cement paste, distance hole at the bottom of height about one meter in up and down reciprocatingly spur drilling rod 3 and closing door 6 thereof thereafter, the while guncreting, cement paste complete filling in press irritating, consolidate with side soil and to combine, the stake end, just forms one section and stirs expanded bore pile section 15, and this construction operation effectively raises the bearing capacity of single pile of mass-type foundation stake.

Claims

1. rig of constructing the high-bearing stake, comprise the auger stem (3) that power assembly (1) is connected with power assembly power, be provided with hydraulic cylinder (12) in the power assembly, drilling rod core pipe upper end is provided with slurry concrete pumping tube connector, it is characterized in that drilling rod core pipe lower end is provided with down transfer sealing pulp concrete mouth (7), goes up and transfer the closing door (6) of opening pulp concrete mouth and sealing helical duct, hydraulic power bar (10) lower end of hydraulic cylinder is hinged on the closing door control link.

2. the rig of constructing the high-bearing stake according to claim 1 is characterized in that starching concrete pumping tube connector and comprises Grouting Pipe (4) and pump concrete pipe (5), and Grouting Pipe is provided with check valve in the go side mutually with core pipe (2) upper end of auger stem.

3. the rig of constructing the high-bearing stake according to claim 1 and 2, the lower end that it is characterized in that auger stem is conical drill bit (8), the symmetrical side of this taper shape drill bit is provided with two pulp concrete mouths, closing door (6) rotating shaft is fixedly installed on the auger stem, and the inner hydraulic power bar lower end with hydraulic cylinder of the control link of fixedlying connected with closing door (9) is articulated and connected.

4. the rig of constructing the high-bearing stake according to claim 1 and 2, it is characterized in that the auger stem core pipe mouth of pipe one radially is provided with drill bit plate (11) in the position, the symmetrical side of closing door (6) be arranged at drill bit plate both sides, with the drill bit of the common structure of drill bit plate one vertex (vertices), the closing door rotating shaft is fixedly installed on the auger stem, and the control link of fixedlying connected with closing door (9) is inner to be articulated and connected with hydraulic power bar (10) lower end.