The Recyclable anchor rope type carrier head of high-pressure rotary-spray cement-soil anchor pole
Technical field
The utility model relates to the construction technology of high-pressure rotary-spray cement-soil anchor pole, is specifically a kind of Recyclable anchor rope type carrier head of high-pressure rotary-spray cement-soil anchor pole.
Background technology
Along with the development of national economic development, the cement-soil anchor pole of pattern foundation pit supporting structure obtains promotion and application more and more widely.
The cement-soil anchor pole (abbreviation soil anchor bolt) of traditional pattern foundation pit supporting structure adopts low pressure such as the pressure of 4 ~ 6MPa to inject cement paste, cement-soil injecting cement paste is mixed to form with the soil body, and in injecting cement paste, insert reinforcing bar or steel strand as anchor cable to bear resistance to plucking load, be provided with carrier head in the inner of injecting cement paste, the front end of anchor cable is connected anchoring with carrier head.
Traditional carrier head is generally cast carrier head, it comprises outer sleeve and is fixed on the U-shaped plate in outer sleeve, after anchor cable doubling, the bending segment of front end is through the gap outer sleeve and U-shaped plate to realize the connection of anchor cable front end and carrier head, and the end head of two anchor cables in rear end of anchor cable is locked on the supporting waist rail of soil anchor bolt rear end by anchor clipper after jack prestressed stretch-draw.
Because traditional soil anchor bolt pressure is low, diameter is little, anti-pulling capacity is little, therefore the bearing capacity of traditional carrier head can meet its requirement.But along with technological progress, the soil anchor bolt application of high-pressure rotary-spray formula is day by day extensive, and this soil anchor bolt grouting pressure is high, generally more than 20MPa, and diameter is large, anti-pulling capacity is also high, and the carrier head of prior art obviously can not meet the demand of the anti-pulling capacity of high-pressure rotary-spray formula soil anchor bolt.And the carrier head structure of prior art is simple, can rotate together along with drilling rod if be enclosed within drilling rod, cause the anchor cable that carrier head connects to be wound around and beat strand, so, during construction, must first hole with drilling rod, exit drilling rod again, by a Grouting Pipe, carrier head is headed at the bottom of hole, then slip casting, namely boring and slip casting substep is needed to carry out, process is loaded down with trivial details, long in time limit, and efficiency is low.And the soil anchor bolt of pattern foundation pit supporting structure also needs the problem considering recycling, because after foundation pit construction, anchor cable in soil anchor bolt goes out of use and can cause waste, and the anchor cable length of supporting is longer, often exceeds building line, therefore the dismounting considering anchor cable is more needed to reclaim.
Utility model content
A technical problem to be solved in the utility model is, provides the Recyclable anchor rope type carrier head of high-pressure rotary-spray cement-soil anchor pole that a kind of anti-pulling capacity is high, can simplify work progress, reduction of erection time, raising efficiency of construction.
A technical solution of the present utility model is, provides a kind of Recyclable anchor rope type carrier head of high-pressure rotary-spray cement-soil anchor pole, it comprise the disc plate of one piece of band centre bore, one piece of band half mounting hole arch sheet, two connect bar dowels and two U-shaped fasteners;
Two side planes of arch sheet rear end are welded on the front of disc plate, and the thickness bisector of arch sheet overlaps with a diameter of disc plate, and the side of disc plate is run through along disc plate thickness direction two half-arc grooves;
The semi arch side of arch sheet is provided with a limit groove extended along semi arch side; The two ends of limit groove are communicated with two half-arc grooves respectively; The rear end of half mounting hole is communicated with the front end of centre bore and centre bore aperture equals the width of half mounting hole;
Two connect bar dowels and are welded on the back side of disc plate, and the open side of each U-shaped fastener is connected bar dowel is welded and fixed with one;
Anchor cable forms bending segment with another U-shaped fastener be connected with this carrier head through a U-shaped fastener, a half-arc groove, limit groove, second half arc groove successively.
Utilize the method for this carrier head construction high-pressure rotary-spray cement-soil anchor pole as follows.
First cut out disc plate, and on disc plate, cut out centre bore and upper and lower two half-arc grooves, upper and lower two half-arc grooves are positioned at the same of disc plate diametrically; And cut out arch sheet and process limit groove in the semicircle cambered surface of arch sheet, then cut out half mounting hole; Then two of arch sheet rear end side planes are welded on the front of disc plate, and the thickness bisector of arch sheet overlaps with a diameter in disc plate front, ensure that the two ends of the limit groove of arch sheet are communicated with the front end of two half-arc grooves of disc plate respectively, now arch sheet is also vertical with disc plate simultaneously; Weld two again in the rear end of disc plate and connect bar dowel.Then an anchor cable is passed successively first arc groove, the limit groove of arch sheet, second arc groove of disc plate of disc plate, entangle one section of anchor cable with U-shaped fastener again and by U-shaped fastener openings side be connected bar dowel and weld, make U-shaped fastener and be connected bar dowel and form the closed loop of entangling anchor cable, in particular, two U-shaped fasteners are connected bar dowel and form two closed loops with two, entangle two straight sections after anchor cable bending segment respectively, now, anchor cable front end forms bending segment and is connected with carrier head.
Again the apex point of drilling rod is inserted through disc plate centre bore in half mounting hole of arch sheet, and drilling rod is provided with non-rotary stator sleeve, stator sleeve is fixed with postive stop baffle, on the apex point that carrier head is linked in drilling rod and the postive stop baffle of the disc plate back side of carrier head and drill bit against, like this, when drilling rod rotates, carrier head non rotating, avoids the anchor cable on carrier head to be wound around and beats strand.By drilling rod mating holes position, be enclosed within by carrier head after on drilling rod, drilling rod is holed, rotate whitewashing, while namely holing, slip casting forms cement-soil injecting cement paste simultaneously, when the apex point of drilling rod arrives absolute altitude at the bottom of soil anchor bolt, carrier head is also delivered at the bottom of hole by drill bit, finally rotates and extracts drilling rod, simultaneously the second gunite.After drilling rod is extracted, cement-soil injecting cement paste is formed, last prestressed stretch-draw anchor cable rear end, and is fixed by anchor cable rear end intermediate plate.Now, the front end bending segment of every root anchor cable is connected with carrier head, and Liang Ge termination, rear end is fixed by intermediate plate respectively.After soil anchor bolt uses, the intermediate plate of two terminations of every root anchor cable rear end is come loose, then with the plastic sheath peeling one of them termination off, applies pull out force with jack or hoist engine, the steel strand of whole anchor cable are extracted from plastic sheath, to reclaim cycling and reutilization.
From analyzing above, the Recyclable anchor rope type carrier head of the utility model high-pressure rotary-spray cement-soil anchor pole compared with prior art, has the following advantages and effect:
This carrier head anti-pulling capacity is high, and boring time can not follow drilling rod rotate, therefore make boring, whitewashing two steps carry out simultaneously, shorten the duration, simplify operating procedure, improve operating efficiency; And this carrier head is after anchor pole uses, and can not fix dead anchor cable, the reinforcing bar in its anchor cable can extract recovery out, be convenient to recycling, avoid waste.
Accompanying drawing explanation
Fig. 1 be the Recyclable anchor rope type carrier head of the utility model high-pressure rotary-spray cement-soil anchor pole face structural representation.
Fig. 2 is that the Recyclable anchor rope type carrier head of the utility model high-pressure rotary-spray cement-soil anchor pole is from the structural representation viewed from disc plate frontal.
Fig. 3 is that the Recyclable anchor rope type carrier head of the utility model high-pressure rotary-spray cement-soil anchor pole is from the structural representation viewed from direction, the disc plate back side.
Shown in figure 1, centre bore, 2, disc plate, 3, half mounting hole, 4, arch sheet, 5, connect bar dowel, 6, U-shaped fastener, 7, half-arc groove, 8, limit groove, 9, anchor cable.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, Figure 2, Figure 3 shows, the Recyclable anchor rope type carrier head of the utility model high-pressure rotary-spray cement-soil anchor pole, the arch sheet 4, two that it comprises disc plate 2, piece band half mounting hole 3 of one piece of band centre bore 1 connects bar dowel 5 and two U-shaped fasteners 6.
Two side planes of arch sheet 4 rear end are welded on the front of disc plate 2, the thickness bisector of arch sheet 4 overlaps with a diameter of disc plate 2, the side of disc plate 2 is run through along disc plate 2 thickness direction two half-arc grooves 7, from the frontal of disc plate 2, article two, half-arc groove 7 is positioned at the same in disc plate 2 front diametrically, that diameter that this diameter namely overlaps with the thickness bisector of arch sheet 4.
The semi arch side of arch sheet 4 is provided with a limit groove 8 extended along semi arch side.
The two ends of limit groove 8 are communicated with two half-arc grooves 7 respectively.The rear end of half mounting hole 3 is communicated with the front end of centre bore 1 and centre bore 1 aperture equals the width of half mounting hole 3; Half mounting hole 3 can regard the hole be combined into by a semicircle orifice and a rectangular opening as, and the width of half mounting hole 3 is exactly the width of rectangular opening i.e. the aperture of semicircle orifice, and above-mentioned width is equal with the aperture of centre bore 1.
Two connect the back side that bar dowel 5 is welded on disc plate 2, and the open side of each U-shaped fastener 6 is connected bar dowel 5 with one and is welded and fixed.
Anchor cable 9 forms bending segment with another U-shaped fastener 6 be connected with this carrier head through U-shaped fastener 6, half-arc groove 7, limit groove 8, second half arc groove 7 successively.