CN2835348Y

CN2835348Y - Under-reamed device for foundation construction

Info

Publication number: CN2835348Y
Application number: CN 200520093880
Authority: CN
Inventors: 王国奋
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-28
Filing date: 2005-11-28
Publication date: 2006-11-08
Anticipated expiration: 2015-11-28

Abstract

The utility model relates to a bottom-expansion pile device for foundation construction, particularly a bottom-expansion device of a prefabricated steel concrete bottom-expansion pile of an immersed tube for buildings, which is a preferred device of the prefabricated steel concrete bottom-expansion pile of an immersed tube for bottom-expansion soil excavation and soil pulverization. The utility model comprises a frame which can be positioned to the immersed tube, a power source, a drive mechanism which is connected with the power source and a cutting knife frame which is driven by the drive mechanism to open and fold. The utility model is characterized in that the drive mechanism comprises a power rod, wherein one end of the power rod is connected with the power source, and the other end of the power rod is connected with an upper shaft sleeve; a fixed gear wheel is connected with a centre shaft by screw threads, the lower end of the centre shaft is orderly penetrated through the frame, a lower fixing disc, and a transverse rod of the knife frame to be connected with the upper end of a vertical cutting knife, and the cross section of the vertical cutting knife presents a shape with a round upper part and a square lower part or an edge-cutting round; the transverse rod of the knife frame is sheathed with the centre shaft, and the lower shaft sleeve is fixedly connected with the transverse rod of the knife frame. The utility model has the advantages of good stabilization, easy control and low cost.

Description

A kind of foundation construction bottom-expanding equipment

Technical field

The utility model relates to a kind of bottom-expanding equipment of foundation construction expanded bore pile equipment, particularly a kind of pipe sinking prefabricated steel concrete club-footed pile for building.

Background technology

Fast development along with builing industry, high-rise building is more and more, high-rise building requires also increasing to its basic supporting capacity thereupon, often adopt expanded bore pile with the distribution density that reduces foundation pile with reduce cost in order to increase single pile bearing capacity, expand end shoveling equipment arises at the historic moment thereupon, yet however, shoveling equipment all is not suitable for the shoveling needs that immersed tube prefabricated steel concrete expands the end at the bottom of the expansion in the past, because the transmission mechanism instability of conventional art bottom-expanding equipment makes its poor accuracy, effect and control ability are low, the hack weak effect, and volume is big, and the cost height is subjected to certain limitation so it is applied.

The utility model content

The utility model provides a kind of stable at the problem that above-mentioned prior art exists, good control, the construction foundation working bottom-expanding equipment that reduces cost.

The utility model realizes that the purpose technical scheme is: a kind of foundation construction bottom-expanding equipment, it comprise can with the frame of immersed tube location, power source, the transmission mechanism that is connected with power source, drive the cutter saddle that can open with gathering by transmission mechanism, it is characterized in that transmission mechanism comprises: an end links to each other with power source, the power rail that the other end links to each other with Upper shaft sleeve, fixed gear is threaded with axis, the lower end of axis is passed frame successively, lower fixed disk, the knife rest cross bar links to each other with the upper end of vertical cut cutter, middle shaft section is circular upper part and square lower part or scarce limit circle, the knife rest cross bar is set on the axis, and Lower shaft sleeve is fixedlyed connected with the knife rest cross bar.

Described axis epimere is a screw rod, and the projection by the both sides, upper end puts in the corresponding slideway in the Upper shaft sleeve.

Described axis is provided with defining flange in knife rest cross bar bottom.

The lower end of described Upper shaft sleeve is provided with rolling bearing, and the projection that its interior axially both sides are provided with slideway and both sides, axis upper end is complementary.

The utility model compared with prior art, axis epimere screw rod hypomere is a square or scarce limit circle, cooperates with last Lower shaft sleeve is organic respectively, and axis descends and vertically cuts the earth, rise and expand end shoveling, a series of technical measures such as counter-rotating hack, and good through the evidence positional accuracy, guarantee pile body and expanded bore pile base good concentricity, obviously improve single pile bearing capacity, expanded bore pile seat shape meets standard-required, and easy control easy and simple to handle reduces the Foundation Design cost; Transmission mechanism can make the shoveling of the expansion end and pulverize the soil body and finish simultaneously simultaneously, raises the efficiency and the Foundation Design quality.The utility model bottom-expanding equipment compact conformation, automatic and mechanical degree height, expansion substrate amount is good, the precision height, work progress is safe and reliable, and is simple to operation, and the controlled ability of equipment is strong, soil body good crushing effect.

Below in conjunction with the drawings and specific embodiments the utility model is described in further details.

Description of drawings

Fig. 1 is a main TV structure schematic diagram of the present utility model.

Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1.

Fig. 3 is the B-B sectional structure schematic diagram of Fig. 1.

Among the figure 2, the iron pin; 3, alignment pin; 4, overcoat; 5, draw-in groove; 6, column; 8, gear; 11, metal closures; 14, Upper shaft sleeve; 15, spring; 17, power rail; 18, horizontal location pin; 19, go up fixed disk; 21, Lower shaft sleeve; 22, support link; 23, axis; 24, vertical cut cutter; 25, expand the undercutting sharpener; 27, spring; 29, horizontal pin; 30, spring; 31, screw; 32, spacer pin; 33, lower fixed disk; 34, spring; 41,42, strengthen fixed head; 50, knife rest cross bar; 52, defining flange.

The specific embodiment

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, but protection domain of the present utility model is not limit by embodiment.

As shown in Figure 1 be main TV structure schematic diagram of the present utility model.The last fixed disk 19 of frame and lower fixed disk 33, between the two by it being fused along circumferentially uniform two or four or eight or more root posts 6, top, middle part also are provided with strengthens fixed head 41,42, be the upper end that the pyramidal metal closures 11 of round platform is set in Upper shaft sleeve 14, and place the center of fixed disk 19, bottom is provided with support spring 15, the power rail 17 that the upper end of Upper shaft sleeve 14 links to each other with power source links to each other, the lower end of Upper shaft sleeve 14 places on the lower plywood of strengthening fixed head 41, its outer rolling bearing that is provided with; The upper end of axis 23 puts in the Upper shaft sleeve 14 and the projection on both sides, upper end is entered in the corresponding slideway of Upper shaft sleeve, the upper semisection of axis 23 is a screw rod, the lower semisection cross section is a square or scarce limit circle, overcoat 4 is sleeved on Lower shaft sleeve 21 outsides, the lower end of axis 23 is passed the lower fixed disk 33 of frame in turn, knife rest cross bar 50 links to each other with vertical cut cutter 24 upper ends, knife rest cross bar 50 is sleeved on axis 23 bottoms, fixing gear 8 is threaded with axis 23, the lower fixed disk 33 that frame is passed in the lower end of Lower shaft sleeve 21 is fixedlyed connected with knife rest cross bar 50, the two ends of knife rest cross bar 50 are hinged with an end that expands undercutting sharpener 25, one end of support link 22 is hinged with the middle part of expanding undercutting sharpener 25, and the both sides, top of the other end and vertical cut cutter 24 are hinged; The described fixed disk 19 interior edges of going up circumferentially are laid with four horizontal location pins 18, and the outer end is exposed the side face tail end and is provided with spring 34; The both sides of described lower fixed disk 33 are arranged with the alignment pin 3 that can be complementary with immersed tube bottom locating slot, and the inner of its pin is provided with spring 27, on spacer pin 32 is arranged, the outer end is provided with the iron pin 2 on band inclined-plane, top.And radially being provided with the horizontal pin 29 that can put in the draw-in groove 5 wide on Lower shaft sleeve 21 perisporiums being vertical central part with it, afterbody has spring 30 with screw 31 location, also is provided with the handle that it is pulled out on the horizontal pin 29.Described axis 23 is provided with defining flange 52 at the position of knife rest cross bar 50 following certain distances.The power source of the utility model equipment is the motor that can change anyway.

When equipment of the present utility model uses, power rail 17 is mentioned, equipment is aimed at the immersed tube mouth, and the mark that iron pin 2 is aimed on the immersed tube mouth, this mark is to aim at the immersed tube locating slot at bottom, afterwards equipment is put into immersed tube, this moment, spring 27 was compressed, and iron pin 2 presses closer the immersed tube inwall and slides downwards, directly enters the channel opening place, slip in the groove, iron pin 2 is positioned fixing.This moment, its total weight was depressed metal closures 11, and four horizontal location pins 18 are pushed outwards to be gone out, and presses closer the immersed tube inwall, and the equipment upper end is also fixedly positioning.When the power rail 17 of machining this moment turns clockwise, gear 8 puts in axis 23 downwards, vertical cut cutter 24 clockwise rotates vertically thereupon the bottom pan soil is reamed, and stops automatically after dark when reaching mark, and this moment, horizontal pin 29 stretched in the draw-in groove 5 on Lower shaft sleeve 21 perisporiums; Power rail 17 is made inhour and is rotated, axis 23 begins to promote, support link 22 with outside open when will expand undercutting sharpener 25 and get out pan soil reamed, reach the design base diameter, be after power rail 17 reaches the regulation rotating speed, expand end shoveling and finish that the defining flange 52 of axis 23 lower ends contacts with knife rest cross bar 50 and stops to open at this moment, power rail 17 is rotated further a few, because the draw-in groove 5 on the Lower shaft sleeve 21 has suitable width, after a bit of distance of whole knife rest vertical-lift, stop after promptly arriving the regulation revolution, then power rail 17 counter-rotatings, the knife rest rotation is drawn in, and its gathering process is pulverized the soil body, certainly does so repeatedly, enough pulverized until the soil body, after action was finished, power rail 17 promoted, and horizontal location pin 18 moves to the center, the upper end constraint relief, iron pin 2 skids off in groove, and equipment is hung out ground, with handle horizontal pin 29 is pulled out draw-in groove 5, knife rest recovers the original shape that draws in, prepares to cut the earth next time.

Claims

1, a kind of foundation construction bottom-expanding equipment, it comprise can with the frame of immersed tube location, power source, the transmission mechanism that is connected with power source, drive the cutter saddle that can open with gathering by transmission mechanism, it is characterized in that transmission mechanism comprises: an end links to each other with power source, the power rail (17) that the other end links to each other with Upper shaft sleeve (14), fixed gear (8) is threaded with axis (23), the lower end of axis (23) is passed frame successively, lower fixed disk (33), knife rest cross bar (50) links to each other with the upper end of vertical cut cutter (24), axis (23) cross section is circular upper part and square lower part or scarce limit circle, knife rest cross bar (50) is set on the axis (23), and Lower shaft sleeve (21) is fixedlyed connected with knife rest cross bar (50).

2, foundation construction bottom-expanding equipment according to claim 1 is characterized in that described axis (23) epimere is a screw rod, and puts in the interior corresponding slideway of Upper shaft sleeve (14) by the projection on both sides, upper end.

3, foundation construction bottom-expanding equipment according to claim 1 and 2 is characterized in that described axis (23) is provided with defining flange (52) in knife rest cross bar (50) bottom.

4, foundation construction bottom-expanding equipment according to claim 1 is characterized in that the lower end of described Upper shaft sleeve (14) is provided with rolling bearing, and the projection that its interior axially both sides are provided with slideway and both sides, axis (23) upper end is complementary.