CN2052010U - Connected conic screw anchor - Google Patents

Abstract

The utility model relates to an improved screw anchor in soil, comprising a conical twist drill, an anchor section screw rod and a non-anchor section round rod. The anchor section screw rod and the non-anchor section round rod are connected by a short rod, and a connecting position is composed of a plug body and a socket body. The screw rod can squeeze and fill surrounding soil layers to form soil columns via appropriate screw pitch, drilling velocity and rotational speed in the process of drilling in soil, and the aim of direct anchor can be obtained via the friction of the soil layers. The screw anchor has simple structure and convenient disassembly and assembly, the screw anchor can be utilized repeatedly after recovery, and the section coupling characteristic of the screw anchor can make up the defect that construction is inconvenient in narrow places.

Description

Connected conic screw anchor

The utility model belongs to Foundation Design anchor bolt construction field.

Deep-cut foundation construction in the place that does not allow to put the slope, often adopt bolt support soil blocking pile (wall) construction technology.Usually earlier being drilled to dark about 20 meters, diameter with rig is 120～150 millimeters hole, puts into steel hinge line or reinforcing bar and Grouting Pipe then, reinject cement or cement mortar.After treating that slurries reach certain intensity, install other support parts and get final product stretch-draw anchor.This kind anchor pole mostly is permanent, treats that Foundation Design finishes just discardedly to imbed undergroundly, and near the construction operation this can give in the future stay obstacle, has also consumed a large amount of cement and steel simultaneously.

The purpose of this utility model provides that anchor pole is a spiral anchor rod in a kind of improved soil, and it can feed by the spiral of self to be configured in and directly reach the anchoring purpose in the soil layer; The rod member of anchor pole is made of the quarter butt serial connection.The peace installation and dismantling that its coupling configuration mode is convenient to rod member are driven, and provide convenience for being engaged in anchor bolt construction in narrow place.

The utility model is realized in the following manner.According to the line of demarcation on wall soil layer landslide, foundation ditch under foundation construction condition hole, the anchor pole total length is divided into the position that two parts promptly are positioned at soil layer landslide scope is called non-anchoring section; The position that is positioned at the steady soil scope is called anchoring section.The front end of anchor pole is a tapered twist drill, and anchoring section thereafter all is to connect with the identical quarter butt of length to constitute with non-anchoring section rod member.The quarter butt of anchoring section is provided with helix and feeds structure, and the quarter butt of non-anchoring section is the light round bar without exception.The termination of each quarter butt and end tail are respectively equipped with and joining plug body of other quarter butt and receptacle body.Because the screw rod of anchoring section is provided with suitable pitch, therefore anchor pole is in piercing underground process, by suitable feeding rate and rotating speed will under the condition of not scratching the layer of breaking ground will around soil layer compacted and form earth pillar, rely on the frictional resistance of soil layer to realize the anchoring purpose.This anchor pole is applicable to the various soil layers except that layer of gravel, especially is suitable for the support engineering that has phreatic stratum and south to change the deep foundation soil blocking pile (wall) of weak soil layer.The utility model just can be made of common processing equipment and electric welding machine because of simple structure.

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

Fig. 1 is a jointing type cone-type spiral anchor pole schematic diagram

Fig. 2 is an anchor pole point of attachment cross section cut-away view

Fig. 3 feeds structure cross section cut-away view for the anchor pole spiral

Fig. 4 is a spiral anchor rod coupling components schematic diagram

This anchor pole is made up of tapered twist drill (1) anchored spiral pole (3) and (4) three parts of non-anchor round pole.The root of augers (1) connects with the first segment quarter butt of screw rod (3) and is fixing with bearing pin (2).The helix of screw rod (6) is 12～14 millimeters reinforcing bar be welded (seeing Fig. 1, Fig. 2 and Fig. 3) with three diameters, can reduce the machine expense of anchor pole like this, simultaneously can adjust pitch man-hour as required adding again, pitch can be selected to use in 60～130 millimeters scopes.For easy accessibility, anchored spiral pole (3) and non-anchor round pole (4) all are to be 2000 millimeters with length, diameter is that 102 millimeters thick-walled seamless steel pipes serial connection constitutes, and the front-end and back-end of every quarter butt are respectively equipped with plug body (11) and the receptacle body (12) that is used to connect.The plug (9) of plug body (11) is equilateral many prismatics, and length is that 60 millimeters its equilateral width are 70 millimeters; The jack (7) of receptacle body (12) also is equilateral many prismatic structures, is 70 millimeters deeply, and internal diameter size and equilateral width are that 70 millimeters plug (9) is (see figure 4) movingly.Plug (9) is equipped with radial direction through hole (10) with jack (7), just can penetrate the through hole (10) that joins the company headquarters position with bearing pin (2) after the quarter butt serial connection like this and use cottor pin (8) with bearing pin (2) locking (see figure 2) then.Augers (1) root is provided with same receptacle body (12) structure, and the drill bit total length is 400～450 millimeters, and diameter is 150 millimeters, and connecting the back length overall with anchored spiral pole and non-anchor round pole is 24.65 meters.During operation, the rear end of every quarter butt all can be connected rotation with the slew gear of headstock (5), and this operating type is particularly suited for narrow construction plant.In addition can also be in construction earlier with outside the native tap of high-speed drilling machine with non-anchoring section in the anchor hole, with slow-revving mode spiral anchor rod is screwed into undergroundly when arriving anchoring section again, this mode can adopt by the actual conditions at scene.

Replacing grouted anchor bar with the cone-type spiral anchor pole, is considerable on economic benefit.With capital mansion foundation construction is example, uses grouted anchor bar, and steel using amount is 42 tons, adds the cement consumption, and total cost is 188.47 ten thousand yuan.And the employing spiral anchor rod, steel using amount is 60 tons, but because of then being 70～900,000 yuan without its total cost of cement.Secondly spiral anchor rod also recyclable and boundless and indistinct  Ge four stilbene   ∈ ┕ そ of repetition  after use tease that＜the crack chaff prolongs disrespectful

Claims (2)

1, a kind of jointing type cone-type spiral anchor pole is formed by tapered twist drill (1) and rod member connection, it is characterized in that:

A. rod member is dimerous by screw rod (3) and light round bar (4), described screw rod (3) and light round bar (4) are made of by head and the tail order serial connection some quarter butts again, and the front-end and back-end of every quarter butt are respectively equipped with plug body (11) and the receptacle body (12) that connects with other quarter butt;

B. the helix of screw rod (6) is to merge welding with reinforcing bar to constitute; Pitch is 60～130 millimeters.

2, spiral anchor rod according to claim 1 is characterized in that the plug (9) of plug body (11) and the jack (7) of receptacle body (12) are equilateral many prismatic structures, and plug (9) and jack (7) are provided with radial direction through hole (10).

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