SU681154A2 - Device for placing concrete in boreholes - Google Patents

Description

I

The invention relates to the construction industry and can be used for concreting wells under a mud solution in the manufacture of piles in the ground.

According to the main author. St. No. 476359, a device for concreting a cKBa-v reel in the manufacture of piles in the ground is known, which includes a vibrating tube with a loading window, a relief valve and a mechanism for controlling it, and the body of the vibrating tube is made with loading windows that extend along its entire length, for example, along a helix , with non-return valves mounted in them, and a vibropipe installed in the opening of the conical bunker, equipped with vibrators l.

However, in case of an inevitable technological break between the drilling of a well and the concreting of the pile, the spam is deposited in the bottom of the well, the sludge heals and is not eliminated during the concreting process, so the pile is based almost on weak soil.

which leads to a decrease in its carrying capacity.

The purpose of the invention is to increase the bearing capacity of piles manufactured by concreting under clay pacTBqjoM.

This is achieved by the fact that the device for concreting wells in the manufacture of piles in the soil according to ed. St. 476359 is equipped with an annular manifold - distributor with placed rows of nozzles mounted at the lower end of the vibrocooler and connected to it through a pipeline passed through the vibropipe with a compressor. In this case, the nozzles can be directed downwards, and the axes of one row and parallel to the axis of the vibrating tube, and the axes of the nozzles of the other row are located at an angle of 6 ° to the axis of the vibrating tube.

FIG. 1 shows the proposed device, general: view; in fig. 2 shows the lower end of the vibrator tube.

Claims (2)

The device contains a tapered loading hopper 1, sealing apron 2, vibrating tube 3 with loading openings 4 and discharge valve 5. Vibrating tube 3 ends with manifold 6 with two rows of nozzles inclined in different directions. Inside the vibropipe 3 there is a pipeline 8 with a hose 9 to the compressor 1Q. The device works as follows. After the bunker has accumulated and the vibrating tube is fully lowered in a known manner, the compressor 1O injects air under pressure of 6-8 MPa into the manifold-distributor 6. Discharge through nozzles 7, air creates a mechanical effect on the sludge particles and turbulent mud flow in the well bottom, to the thinning of r-ama and subsequent raising of its particles with air bubbles (air-lift effect). At the same time, the air from the inner row of nozzles, which are parallel to the axis of the vibropipe, mechanically acts on the cuttings in the bottom, and the outer air directed at an angle of 6 ° to the axis of the vibrating pipe 3 above the collector, contributes to its elevation. After 8-10 minutes of purging, the pile is concreted in the prescribed order, while the suspended sludge is pressed from the well through the annulus. Thus, the application of the proposed device will allow to increase the bearing capacity of the piles, C1, to meet the regulated requirements for the clay solution and the permissible rate of technological break between drilling and concreting a well. The invention of the device for concreting wells in the manufacture of piles in the soil by author. St. 476359, characterized in that, in order to penetrate the capacity of piles manufactured by pouring concrete under the ELM solution, due to washing and removal of sludge from the wells, it is equipped with an annular collector with mixed rods that are mounted at the lower end of the inlet pipe and connected to it through the pipeline, passed through vnfotrubu, compressor. 2. A device according to claim 1, characterized in that the nozzles are mounted downward, and the air vents of one psna are parallel to the axis of the vibrating pipe, while the axis of the nozzles of the other row are at an angle of 6 ° to the axis of the crane cuts. Sources of information taken into account during the examination 1. Copyright witness of the USSR № 476359, cl. E O2 B 7/28, 1972.