SU877049A1 - Method and device for setting ferroconcrete anchors - Google Patents

Description

(54) METHOD OF INSTALLATION OF REINFORCED CONCRETE ANCHORS AND DEVICE FOR ITS IMPLEMENTATION

one

This invention relates to the fastening of mine workings with reinforced concrete anchors.

There is a method of installing reinforced concrete anchors, including Zapolna-5. well drilling with a ready cement or cement-sand mortar by means of a pneumosupercharger and introducing an anchor rod into a filled well, 1.

However, this method is not applicable when using fast-hardening cements, as this may cause premature hardening of the solution in the supercharger or feed hoses.

The closest to the result proposed by the technical essence and the achievement of MOMi is the method of installing reinforced concrete anchors, including the introduction of components into the well by means of a liquid component and the installation of an anchor rod 2.

The disadvantage of this method is the need to use the components of the mixture, which increases the complexity of the lining installation process, and the presence of shells of cartridges of synthetic films impairs the mixing quality of components and lowers the anchoring strength of the anchor rod in the well.

A device for implementing a method for installing reinforced concrete anchors is known, which includes a screw mechanism for filling a well with a dry mixture, driving with a gear and spindle connected to the screw shaft, and a hopper for mixture 3.

The purpose of the invention is to increase labor productivity when installing reinforced concrete anchors on quick-hardening cements.

15

This goal is achieved by first filling the well with a mixture of dry components and then simultaneously shutting it down the entire length of the well by injecting pressure jets into it from the liquid component.

Such a method is carried out by a device for installing reinforced concrete anchors, including screw

25, a mechanism for filling the well with a dry mix, a drive with a gearbox and a spindle connected to the auger shaft, and a hopper for the mixture; the device is equipped with a perforated needle and the shaft

30 screws and spindle are made with through-channels for placing needles in them.

FIG. 1 is a schematic diagram of a device for installing reinforced concrete anchors according to a method thereof; FIG. 2 is a sectional view in FIG. one.

The device consists of a pneumatic actuator 1 with a spindle 2, a screw 3 and a hopper 4 for a dry mix. The spindle and auger shaft are made with a central channel for the passage of a perforated needle 5. The needle is made of a thin-walled but sufficiently strong pipe, the diameter of which is 68 times smaller than the diameter of the well. Holes are drilled in the pipe walls so that the pressurized fluid injects into the well in the form of pressure jets. The needle deep in the borehole is centered with a rosette 6 with elastic tendrils tucked into the borehole walls. The socket can be made of any elastic or elastic material. On the side of the wellhead, the cylinder with the screw, and at the same location as the needle, is centered by means of an elastic ob / ttj 7, which is pushed into the walls of the well. The liquid component is fed to the needle from the metering device through the hose 8. A mechanism for filling the well with a dry mixture is mounted on hinged supports allowing the well to be filled with any inclination.

The method of installation of reinforced concrete anchors is carried out as follows.

Before starting to fill the well with a dry mixture, the walls of the well are irrigated with a liquid component entering through the needle, which contributes to better adhesion of the concrete on contact with the rock. After irrigation with a screw mechanism, a dry mixture containing a stagnant is fed, which fills the well for the entire length, then through the perforated needle from the dosing device of any known construction an appropriate portion of the liquid component is injected in such an optimal amount that, while maintaining the low water-to-cement ratio (within 0 , 4-, 05) the obtained solution, firstly, did not fall out of the vertical wells, secondly, so that the metal anchor rod could be embedded in the well-filled well y. The liquid component is distributed throughout the dry mix - due to the penetration of the mixture by pressure jets and diffusion of moisture from one particle of the dry mix to another.

After the mixture of dry components has been plugged in, the needle is removed from the well, not withdrawing it completely from the shaft of the auger shaft and spindle, then the device for shifting the field and the other well is moved. The final installation of the anchor consists in inserting the rod of the rod with a flattened end into the well filled with the solution, and after it has hardened, in mounting the base plate or other supporting elements.

The proposed method eliminates the operation of pre-mixing the liquid component with the components and components of the dry mixture, shortens the time of solution preparation and the installation of the rod, and applies quick-hardening mixtures. The fluid delivery time takes only a few seconds, and the insertion of the anchor rod (rod) is on the order of 20-30 seconds, so it is possible to use formulations with a start time and an end of setting of a few minutes.

Claims (2)

1. The method of installation of reinforced concrete anchors, including an introduction to, the well components of the mixture, followed by solidification of the mixture of dry components through a liquid component and the installation of an anchor rod, characterized in that, in order to increase labor productivity when installing reinforced concrete anchors, the well is first filled with a mixture of dry components and then simultaneously along the entire length of the well injecting into it pressure jets from the liquid component. 2. A device for carrying out the method according to claim 1, comprising a screw mechanism for filling the well with a dry mixture, a drive with a gearbox and a spindle connected to the auger shaft and a mixture hopper, characterized in that the device is provided with a perforated needle, and in the auger and spindle are provided with through channels for accommodating the needles. Sources of information taken into account in the examination 1. Semevsky V.N. and others. Shankov support. M., Nedra, 1965, p. 52. 2. Geleskul M.N. and others. Fastening of mine workings in deep-coal mines. Results of science and technology. Technology development of solid mineral deposits. M., VIMITI, 1975, vol. 13, p. 342-346 (prototype) .3 .Phercherkin A.G. About the rational technology of mechanized charging of wells in open pits and the method for calculating the performance of charging machines. NIRIGORMASH, Mining machines, Sverdlovsk, Sredneuralsk Publishing House, 1965, issue 4, p. 236245 (prototype). Vut.1 (Puf.2