摘要:
There is provided a method for drilling a cased hole and installing a micropile. A sonic drilling apparatus is positioned at a desired location. The sonic drilling apparatus includes a rotating and vibrating apparatus for rotating and vibrating a drill string into the ground. A retrievable drill bit is operatively connected to the drill string. The cased hole is drilled to a desired depth by rotating and vibrating the drill string into the ground. The retrievable drill bit is retrieved from the cased hole following the drilling of the cased hole to the desired depth. A micropile is lowered into the cased hole following the retrieval of the retrievable drill bit. Grouting material may be discharged into the cased hole before or after the drill string is removed from the ground. In another embodiment, a removable drill bit may be used in place of the retrievable drill bit.
摘要:
A method and apparatus for rapidly constructing a structural pier comprising the steps of placing into a soil under a structure to be supported a casing having an inner diameter and an outer diameter, positioning an injection tube into the inner diameter of the casing, and injecting an expansive material into the casing. Optional perforations in the casing allow some of the expansive material to be ejected from the casing into the surrounding soil to create fingers or branches for the purpose of adding friction to the structural pier.
摘要:
Equipment for drilling secant holes (2) constituted by an excavating system (3, 14, 4, 16, and 17) and by a guide system (7, 8), both of which are set in the hole (2) being drilled and in a previously made hole (2'), the two systems being fixed with respect to one another in such a way as to define a pre-set distance between centres of the holes; the excavating system comprising a rotation means (3) and a bit (4) connected thereto, and being completely introduced into the borehole.
摘要:
A speech recognition system and method are provided to correctly distinguish among muliple interpretations of an utterance (202). This system is particularly useful when the set of possible interpretations is large, changes dynamically, and/or contains items that are not phonetically distinctive (203). The speech recogntion system extends the capabilities of mobile wireless communication devices that are voice operated after their intital activation (206).
摘要:
Mittels einer unter Vorspannung stehenden Spule (4), an der eine Meßleine (5) auf- und abwickelbar ist, wobei sich an dem freien Ende der Auf- und Abwickeleinrichtung ein Schwimmkörper (6) oder Strömungskörper befindet, ist während des Bohrvorganges der aktuell erreichte Durchmesser eines herzustellenden HDI-Körpers ermittelbar. Der Schwimmkörper oder Strömungskörper wird von der Strömung des Hochdruckinjektionsstrahles (10) mitgerissen, so daß die Länge der Meßleine der wirksamen Länge des Hochdruckinjektionsstrahles entspricht.
摘要:
A pile head dresser for cast-in-place concrete piles has an inner cylinder 2 arranged for allowing a tremie pipe 16 to move in and out, and surrounded at a distance by an outer cylinder 3, and a top plate 1 and a bottom plate 6 joining the two cylinders 2 and 3 at top and bottom respectively to form a double cylinder structure A, the bottom plate 6 having a plurality of reinforcement bar apertures 8 provided therein at equal intervals of a distance, and the top and bottom plates 1, 6 having exhaust apertures 5 and 9 respectively provided therein for passing a mixture of air and slurry.
摘要:
Provided is a piling construction management method that allows elimination of the effort of redoing piling construction because of insufficient support force by very easily and reliably determining whether the support force of a piling hole is sufficient for the distal end of a piling when erecting piling in a piling hole. The support strength of a hole bottom Hb2 is measured with a penetration testing device M1 before erecting a piling in a piling hole H1. The piling is erected in the piling hole H1 when the measurement is at or above a prescribed value, whereas the piling hole H1 is dug again and the support strength of the hole bottom Hb2 after being dug again is measured with the penetration testing device M1 in the same manner when the measurement is less than the prescribed value. A piling with a length corresponding to the piling hole H2 after being dug again is erected when the measurement is equal to or greater than the prescribed value. The penetration testing device M1: is one in which a knocking block51 on which a penetration shaft 4 is integrated is struck by a drive hammer 52 in free-fall; comprises a lifting mechanism 8 that lifts the drive hammer 52 after falling to a prescribed height and releases same; and determines the support strength from the number of impacts required for the penetration shaft 4 to penetrate to a prescribed depth from the hole bottom Hb1.
摘要:
A method and apparatus for rapidly constructing a structural pier comprising the steps of placing into a soil under a structure to be supported a casing having an inner diameter and an outer diameter, positioning an injection tube into the inner diameter of the casing, and injecting an expansive material into the casing. Optional perforations in the casing allow some of the expansive material to be ejected from the casing into the surrounding soil to create fingers or branches for the purpose of adding friction to the structural pier.