RU2040642C1 - Device for erecting piles in soft ground - Google Patents

Abstract

FIELD: civil engineering. SUBSTANCE: device for erecting piles in soft ground has casing 1 with lengthwise passages 2 to feed liquid, passages 3 to feed air and one 4 to feed solution. Nozzle 5 to feed liquid is communicated to passage 2, nozzle 6 to feed air is communicated to passage 3. End nozzle 7 is located in the lower part of casing 1 and is fabricated of electromagnetic material. Lid 8 is located in the upper part of casing 1. Casing is installed on feed pipe 9 and that is coaxial with pipe 10 to feed inert filling. Pipe 10 is fixed in the upper part of the casing. EFFECT: abundance of cumbersome equipment, erection of piles with controllable bearing capacity, abundance of device revolution. 1 dwg

Description

 The invention relates to the construction, in particular, to the construction of pile foundations, supports, "walls in the ground" by inkjet technology, and can be used to arrange other underground load-bearing and enclosing structures for both new construction and reconstruction.

 A device for pumping cementitious material into the ground in the manufacture of piles, comprising a drill auger with a longitudinal flow channel for supplying cementitious mortar. An outer pipe is fitted on the bottom of the auger with stirring blades. At a certain distance upward from the lower end of the screw, the channel was broadened. Between the broadening and the part of the channel beneath it there is a valve shutter moving in the vertical direction together with the pipe. By moving the screw in the vertical direction, the drilled soil is mixed with the cementitious material ejected through the discharge holes.

 The disadvantages of this device are the complexity of the structural and technological solutions, as well as the manipulation of the valve shutter. Depth valve operation may not provide reliable pile construction. In addition, the use of soil as an inert aggregate to form a pile body in weak water-saturated dusty clay soils is impractical.

 The closest to the proposed technical essence and the achieved result is a device for the construction of concrete piles, including a cylindrical body with longitudinal channels for supplying water and mortar with radial side nozzles. A conical cavity with a central hole is made in the lower part of the housing. After drilling a well, the device is lowered into it, then when the device is gradually raised from the well, a high-pressure jet is simultaneously fed through nozzles that destroy the soil in radial directions and the formed cracks are filled with a fixing solution through a central hole.

 The disadvantage of this device is the formation in the lower part of the leader well of sludge and soil loosened during its construction, which reduces the bearing capacity of the structure being constructed. Radially located nozzles are destroyed in the form of vertical slots and cannot guarantee the necessary bearing capacity of the constructed structure in soft soils. In addition, the use of this device in weak water-saturated dusty clay soils is difficult, since erosion of the soil with water will lead to uncontrolled swelling of the walls of the well, the jet will work in a high density pulp, and the removal of soil particles is not activated by air. The use of piles erected by the specified device will require the introduction of an additional operation to reinforce the pile shaft.

 The main objective of the invention is to increase the reliability, quality and bearing capacity of piles being built in soft soils with the ability to control the bearing capacity both in terms of material and "soil" while simplifying work. In addition, when using the specified device, the number and complexity of technological operations are significantly reduced and the possibility of conducting work in the immediate vicinity of the building appears, which is important when working in the condition of reconstruction. This increases the reliability of the work and saves the binder (cement).

 The essence of the invention lies in the fact that the device for the construction of piles in soft soils includes a housing with longitudinal channels for supplying fluid and mortar, radial fluid nozzles in communication with them and a mechanical nozzle for mortar located in the lower part of the housing. The housing is made in the form of a truncated cone with a conical cover and is equipped with additional longitudinal channels for supplying air and a nozzle connected with it, which is located below the nozzle for supplying liquid. Both of these nozzles are made in the form of continuous annular slots, and the end nozzle is made of electromagnetic material.

 Distinctive features of the device for the construction of piles in soft soils are as follows: the device body is made in the form of a truncated cone, side nozzles for supplying liquid and air in the form of continuous annular slots in the case; an air nozzle is installed below the liquid nozzle; the end nozzle for supplying the solution is made of electromagnetic material with a field that affects the components of the solution; the housing has a conical cover, which allows for metered and directed supply of inert aggregate into the pile material being formed.

 The drawing shows the proposed device, a longitudinal section.

 A device for erecting piles in soft soils includes a housing 1 with longitudinal channels 2 for supplying liquid, air 3, solution 4, a nozzle 5 for supplying liquid in communication with channel 3, an end nozzle 7 in communication with channel 4, for supplying a solution. In this case, the end nozzle 7 is located in the lower part of the housing 1 along its axis and is made of electromagnetic material. In the upper part, the housing 1 has a conical cover 8, the housing 1 itself is mounted on the supply pipe 9. Coaxially with the pipe 9 in the upper part of the housing, a pipe 10 is fixed for supplying an inert filler to the threaded connection.

 A device for the construction of piles in soft soils with adjustable bearing capacity works as follows.

 The device is installed in the place where it is necessary to erect the pile, and the pipe 10 is fixed on the cover 8 of the housing 1 when immersed. Through the supply pipe 9 through the channel 4, erosion fluid is supplied to the end nozzle 7 with a certain initial pressure and flow rate, which provide erosion with a given temperature. In this case, the soil is eroded, the pulp is poured into the annulus of the pipe 10 and the device is immersed in the soil to the required depth (mark). Upon reaching the required mark, the flow of erosive fluid through channel 4 is stopped, and the filing solution is supplied with the pressure of the face pressure, after a necessary time the pressure is reduced. The inert filler is supplied to the pipe 10 in a certain (predetermined) volume. The flushing fluid along the channel 2 is supplied to the nozzle 5, and the air through the channel 3 to the nozzle 6 with operating pressures and flows until the required diameter of the pile is formed. Then the pipe 10 is detached from the cover 8 of the housing 1 and lifted, forming a space for supplying aggregate. The components of the erosion and filling solutions passing through the magnetic field of the end nozzle undergo activation.

Claims (1)

 DEVICE FOR ESTABLISHING PILES IN WEAK SOILS, including a housing with longitudinal channels for supplying liquid and mortar, radial nozzles for fluid in communication with them and an end nozzle for mortar located in the lower part of the housing along its axis, characterized in that the housing is made in the shape of a truncated housing with a conical cover and provided with an additional longitudinal channel for supplying air and a nozzle in communication with it, which is located below the nozzle for supplying liquid, both nozzles being made in the form of continuous annular oil, and the end nozzle for feeding the solution is made of electromagnetic material.