CN2242267Y

CN2242267Y - Hole formation device for composite changed section pile

Info

Publication number: CN2242267Y
Application number: CN 95213581
Authority: CN
Inventors: 郭允庄
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-23
Filing date: 1995-06-23
Publication date: 1996-12-11
Anticipated expiration: 2005-06-23

Abstract

The utility model relates to a hole formation device for a composite changed section pile which is a hole formation device for a non-uniform pile in the building foundation construction, and comprises an outer tube, an inner tube, an upper knife rod, a lower knife rod and a fixed wing slice. The inner tube, the outer tube, the upper knife rod and the lower knife rod form a connecting rod mechanism, and a hole drilling cutting apparatus and a hole expanding cutting apparatus are compounded as a whole. So the device can not only drill a basic hole but also expand a hole, and a plurality of pile holes truncate cones are made. The device has advantages of simple structure and convenient operation and can use positive cycle techniques, pumping techniques and gas lifting reverse cycle techniques.

Description

Combined type non-uniform pile perforating device

The utility model relates to a kind of hole-forming device of construction foundation working non-uniform pile.

The bearing capacity of holing with slurry wall protection perfusion friction pile and the geometry of pile body are closely related.Non-uniform pile under the identical situation of its pile body volume, can bear bigger load than the uniform section stake.Therefore solve the construction problem of non-uniform pile---mainly being the pore-forming problem, is to improve bearing capacity of pile foundation, saves one of important channel of constructional materials.

The hole-forming device of construction non-uniform pile has two classes at present:

1. enlarged opening on pile bottom device.This device has only solved the expansion of the stake end, and pile body still is a uniform section.

2. pile body Counterboring apparatus.Existing this type of device is hydraulic drive, and its defective is: boring and reaming separate, and remove the secondary drilling tool, have increased the activity duration; The hydraulic drive complex structure has increased construction cost.

The purpose of this utility model just provides a kind of machine driving, bores non-uniform pile hole-forming device---the combined type non-uniform pile perforating device that expands unification.

Below with reference to accompanying drawing the utility model is done detailed description.

Fig. 1 is the utility model structural representation.

Fig. 2 is the drill bit structure schematic diagram.

Fig. 3 is a non-uniform pile stake hole sectional drawing.

With reference to Fig. 1, (1) is outer tube, and the upper end links to each other with drilling rod with flange. (2) be guider ring, (6) are for opening " L " in outer tube Shape keyway, epimere are narrow keyway, and hypomere is wide keyway, and the number of keyway is one to four (being three) among the figure. Inner tube (8) Insert in the outer tube and can rotate and flexible. (3) be sealing ring, prevent that silt particle from entering in the inner and outer pipe gap. (7) for installing Square toes dive key on inner pipe, this key can be in wide keyway move left and right, in narrow keyway, move up and down the number of key The same keyway of order. Inner and outer pipe connects drill bit (11) revolution that transmitting torque connects with flange to drive the inner tube lower end by key. Outward Pipe is fixed with upper bracket (4), and drill bit is fixed with undersetting (14), and two bearings are distinguished again hinged upper knife bar (5) and lower knife bar (13), Knife bar outside welding-on has blade (9), and its welding-on direction is drilling rod cutting soil layer when turning round clockwise. Hinge (10) is with two knife bars Link to each other, make outer tube, inner tube, upper knife bar, lower knife bar form linkage, wherein go up knife bar and lower knife bar and be the reaming cutting Tool. It is drill bit fixed tab (12) that datum hole creeps into cutting element. (15) be the little drill bits of leading both wings. Among the figure double dot dash line be upper, Extreme position after lower knife bar opens.

With reference to Fig. 2, (16) are the drill bit short tube, three fixed tabs (12) of the 120 ° of welding in interval thereon, fixed tab lower edge Welding-on has blade (17), and the cutting soil layer distributed between three fixed tabs when its welding-on direction was also turned round clockwise for drilling rod Three undersettings (14) are arranged, and it is welded in the foot of short tube. The hinged lower knife bar of each bearing (13), its length is not more than The length of fixed tab lower edge. When knife bar opens so instantly, just can be fit at the bottom of the round taper hole that fixed tab gets out And carry out on this basis reaming. The drawn lower knife bar of double dot dash line is its extreme position after opening among the figure. (15) be leading The little drill bit of both wings.

With reference to Fig. 3, (18) are Rotary table for drilling machine, and (19) are drilling rod.

During operation, with the flange jointed rod the utility model is lowered to the guide hole hole at the bottom of, then drilling rod is mentioned the height that is equivalent to a narrow keyway length, start rotating disk and turn round clockwise, key is placed in wide keyway position among Fig. 1, can pressurize and creep into.This moment, the reaming knife bar drew in, and drilling rod moment of torsion and the pressure of the drill just pass to fixed tab on the drill bit by key and make it cut soil layer to carry out datum hole and creep into.When be drilled into need reaming the degree of depth time, stop rotating disk revolution, the very little angle of drilling rod of reversing again aligns narrow keyway and key, outer tube promptly under the effect of drilling rod weight and move down, forces the reaming knife bar to open.After key entered into narrow keyway fully, following knife bar had just contacted at the bottom of the hole, started rotating disk then and turned round clockwise.At this moment, the pressure of the drill component mainly is to make reaming knife bar incision soil layer, and it is very little that the axial compression of drill bit fixed tab then becomes, so datum hole creeps into and stop, and by the reaming knife bar outwards, the down-cutting soil layer carries out reaming.Instantly knife bar opens up into extreme position, a frustum of a cone because its radius of gyration greater than the radius of gyration of fixed tab, so just expands in the hole.After reaming finished, as long as promoting drilling rod slightly makes key get back to wide keyway section, the reaming knife bar drew in, can carry out datum hole again and creep into.Creep into and reaming as shown in Figure 3 the non-uniform pile stake hole of just constructing out repeatedly.Behind the concrete perfusion, pile body just has a plurality of cones in the stake hole, thereby has just increased vertical and the horizontal bearing capacity and the uplift resistance of stake, has improved the stability of stake.And requiring under the constant situation of bearing capacity of stake, use this device construction non-uniform pile, just can when design, change paxilla directly, the saving constructional materials.

The utility model will be holed and the cutting element of reaming is compound on the covering device, and boring and reaming operating mode can very clearly display in the variation of surplus chi on machine.Therefore the utlity model has simple in structure, easy to operate advantage.

The utility model can use that direct circulation and pump are inhaled, the gaslift reverse circular technique.

Claims

One kind by outer tube (1), interior pipe (8), go up knife bar (5), the combined type non-uniform pile perforating device formed of knife bar (13), fixed tab (12) down, it is characterized in that:

A. outer tube (1), interior pipe (8), last knife bar (5), following knife bar (13) are formed linkage;

B. fixed tab (12), following knife bar (13), the leading little drill bit of both wings (15) are formed drill bit (11).
2. by the described combined type non-uniform pile of claim 1 perforating device, it is characterized in that outer tube (1) has " L " shape keyway (6).
3. by the described combined type non-uniform pile of claim 1 perforating device, it is characterized in that interior pipe (8) is equipped with square toes dive key (7).
4. by the described combined type non-uniform pile of claim 1 perforating device, it is characterized in that undersetting (14) is welded in the foot of drill bit short tube (16).
5. by the described combined type non-uniform pile of claim 1 perforating device, it is characterized in that the cutting element that datum hole creeps into is drill bit fixed tab (12).
6. by the described combined type non-uniform pile of claim 1 perforating device, it is characterized in that the reaming cutting element is last knife bar (5) and following knife bar (13).
7. by the described combined type non-uniform pile of claim 1 perforating device, it is characterized in that knife bar (5), the blade (9) on the knife bar (13) is consistent with blade (17) welding-on direction on the drill bit fixed tab (12) down, cut soil layer when being drilling rod and turning round clockwise.