SU1281635A1 - Drill and cast-in-place anchor and method of injecting same - Google Patents

Abstract

The invention relates to construction and allows an increase in the speed of erection and the carrying capacity of a brown injection anchor. The anchor consists of pull 1 with tip 8. In the root part of the I ha with tip 8, it is embedded in cement stone 7 surrounded by a draining yoke 9, and along the length of the free extension. - in the cement-stone cage 6. tipK the formation of the anchor drilled a hole under the protection of the casing. When extracting the casing pipe, a material is drained into the well.

Description

We are 9, which is a dry mixture of sand, lime and cement, then we place the casing in the borehole, blocked by the tip of the rod 1, push the dry mixture to the borehole walls and remove the casing under pressure in the root of the anchor and without pressure into the rest of the anchor. For

Formation of the root part of the anchor with local widening in height, the hardening solution is supplied with alternating increase in pressure. The solution supplied to the root part of the anchor is prepared on sprained cement with a plasticizer and the components of the setting time for the cement stone. 2p.p. f-ly, 1 ill.

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The invention relates to construction and relates to the implementation of injection molding anchors for fastening retaining walls and other structures in poorly filtered, especially clay soils. The purpose of the invention is to increase the speed of erection and the bearing capacity of the anchor by reducing the period of mobilization of resistance to its root shear.

The drawing depicts the proposed {“1st anchor, longitudinal section.

The anchor contains pull 1 attached to the structure with the help of a distribution plate 2 and tension locking device 3. P) the length of the freely extending stretch of the drag is made with a coating 4 of anti-corrosion lubricant enclosed in a plastic shell 5 and holder 6 of the hardened cement solution poured into the well. In the root part of the ha, the ha is sealed in the cement cann 7 by means of the tip 8. Between the borehole walls and the cement stone 7 there is a drainage holder 9 made of a mixture of sand, lime and cement.

The anchor is made as follows: A drill is drilled under the protection of a casing (not shown) and is filled while removing the casing with a dry drainage mixture from sand, lime and cement. The mixture may fall asleep to half the depth of the well, and in some cases, to the full length. A casing pipe is then immersed in the well.

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1 and a conical tip 8, which pushes to the sides and additionally seals the drainage mixture and the surrounding soil to form the casing 9. Thereafter, the cement dilution is injected through the casing under pressure into the root part and without the overpressure into the rest. In the process of injection of the solution along the length of the root part, with the successive extraction of the casing to create local broadening, the injection pressure alternates between increasing and decreasing pressure. The injection solution is prepared on the tension cement, and to reduce the lero water-cement ratio, a plasticizer and components are added to increase the strength of the cement stone and to preserve the mobility of the solution, which slow down the setting time and accelerate the strength setting process. A draining yoke from a mixture of sand, lime and cement absorbs moisture from the surrounding soil and the injection solution and, due to the presence of the binding components of lime and cement, gains strength itself and additionally contributes to an increase in the strength of the cement stone formed from the injection solution. Drainage also contributes to an increase in the resistance to displacement of the root at the contact with the - ground. After the solution reaches the root part of the required strength, the anchor is tensioned and fastened to the structure with

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design effort using a locking device.

Performing an anchor with a drainage cage between the walls of the well and the cement stone of the root in the seal allows for increased strength and accelerates the achievement of its required value at the root. The presence of bonding components in the draining cage allows it to be included in the work as well. The creation of local broadening along the length of the root due to alternating increases and decreases in the pressure of the injection solution makes it possible to increase the carrying capacity of the anchor in connection with the transfer to the ground, in addition to tangential compressive stresses.

Claims (1)

Invention Formula I. A brown injection anchor, comprising a root part in the form of a cement stone placed in the ground, covered with grease and a plastic sheath, enclosed in a cement stone holder and connected to the root part by means of a nakrydnik, embedded in a cement stone, characterized by that, in order to increase the speed of erection and bearing capacity of the anchor by reducing the period of mobilization of resistance to its root shear, the anchor is provided with a draining cage placed between its root part and the ground. W f5 0 816354 2, A method for performing a drilling injecting anchor, including forming a well under the protection of a casing, installing a tip with a attached attachment through a casing 5 and removing the casing while simultaneously filling the well with a hardening solution by pumping it into the wellbore parts of the anchor and zapivka into the rest of the well, which is different from the fact that, in order to increase the speed of erection and bearing capacity of the anchor by reducing the time of mobilization, the resistance of After the formation of the well, the shear root is partially extracted from the well the casing pipe with the simultaneous filling of the lower part of the well with a dry drainage mixture of sand, lime and cement, after which it is immersed into the drainage pipe with the tip installed in it,  moreover, a hardening solution prepared on tensioned cement with a plasticizer and components for setting time and subsequent acceleration of the process of curing the cement stone, and the hardening solution hardening alternate with alternating increase and decrease of pressure as five removing the casing;