SU715711A1 - Method of erecting filling pile - Google Patents

Description

(54) METHOD OF CONSTRUCTION OF A BROWNED PILET

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The invention relates to methods for constructing bored piles used in the construction of civil and industrial structures, mainly in subsiding and swelling soils.

There is a method of construction of a bored pile, mainly in the subsidence ti of swelling soils, including the drilling of wells, the installation in it of a flexible protective sheath of non-wettable material and the laying of concrete 1 ...

The disadvantage of this method is the complex technology of the pile shell device,

which is difficult to sink into the well.

 - .- The closest is the method of construction of a bored pile, mainly in subsiding and swelling soils, including the drilling of a well; installation of a flexible protective sheath from a bonded non-wetted material web rolled into a cylinder and concrete placement 2.

The disadvantage of this method is the complex technology of immersing the shell in

well and the complexity of the operation of folding the sheet into a cylindrical shell.

The purpose of the invention is to facilitate the installation of the containment shell.

This goal is achieved by the fact that in a known method of erecting a bored pile, mainly in subsiding and swelling soils, including the drilling of a well, the installation of a flexible protective sheath from the folded into it. bonded cylinder; from non-wettable material and laying of concrete, the fastening of the sheet rolled up into a cylinder is carried out by placing it in an elastic ring connected to the outer turn of the blade and to cables, and during the installation of the shell its inner turn is lifted, unwinding the leaf.

Claims (2)

As a protective sheath, a sheet of protective non-sweatable material, such as roofing felt or other synthetic material, is rolled up into a roll, the height of the roll being equal to the width of the web. The roll on the side of the outer coil in the lower part is attached to the coiled ring .TI,. 3 . . 7 elk of sheet steel with a width of 10–15 cm, a thickness of 3–4 mm, which is 15–20 cm long. The first man is leyu. the strip is coiled into a ring, {whose diameter is 10-15 cm smaller than the diameter of the well. In the folded position, the strip is held with a clamp in the form of a rod 15-20 in length. MM; near the end of the strip entering inside the ring and fixed in the hole near the other end of the strip. 3 hooks, races, are attached to the inner surface of the coiled strip. laid at 120 °, the outer ends of the ko1; curved in an arc of a circle of smaller diameter. A ring of steel strip, together with a protective material roll attached to it, is lowered into the borehole by means of a lifting mechanism, such as a drilling rig. This uses a drilling body, such as a screw auger of the CO- 2. The central teeth of the drill bit is attached to the bolts with a 200-250 ohm diameter pipe, the length of which exceeds the height of the roll of protective material by 40-50 cm. At this distance from the bottom of the pipe outside, at an angle of 120 °, the steel cable with loops on. the ends. The length of the cables is chosen equal to the radius rolled into the steel strip ring minus the radius of the pipe, and two cables near their ends include springs. The ropes hook into a hook on the inner surface of a rolled steel floor: wasps, jr .. 5jM-B at the overlap of the ends of the strip, a rope without a spring is hooked. In this case, the length of the pipe passes inside the rolled-up roll of protective material G6, which overhangs on cables of equal D.PINA provides it with a central position on the rolled-up strip. The protective material rolled into a roll is attached to the pipe with its B1 twist loop. : - - A ring with a roll is lowered into the well to the required depth equal to the depth of negative friction development. But the lateral surface of the pile that occurs when the soil subsides under its own weight or the depth of clay swelling. At this depth, the drilling mechanism is rotated slowly, and with this, the cables stretch over a length of pipe. 1, At the start of the npjofombi winding, two cables are stretched, and the third cable is pulled inside the CBR of the band screwed into the ring and the pin comes out of the fixing hole. The strip is elastically unclamped, tight to the walls of the wellbore chambers. To prevent the borehole from moving, a hole 4 to 2–3 cm long is welded onto the outer surface of the well on its outer surface. Upon further winding of the cables onto the pipe, their loops jump off the strands of the loosened strip. After releasing the cables, the bzf column is slowly raised, simultaneously rotating in the direction in which the roll is unwinding. Experiments showed that for the resulting spiral-shaped shell, taking into account the overlap, in a roll height, observing the geometric similarity, is 0.4 strip lengths. In the case of a ruberoid with a length of 20 m, a well with a diameter of 600 mm will be protected at a length of 6 m. In construction practice it is necessary to arrange a protective coating to a depth of 15 m, i.e. ruberoid consumption per 1 pile will be 2 rolls. ..- ,. . . . After reaching the surface, the protective material is fixed in the wellhead. In the well, the walls of which are covered with protective material in its upper part, the reinforcement cage is lowered, the length of which is assumed by calculation. The specific requirement for the reinforcement cage in the proposed bored pile device method is that the protrusions securing the center position of the casing in the borehole and the same protective concrete layer should be made as smooth round curved rods to prevent the protective shell from becoming loose frame ..... Concreting of the pile is carried out by the method of a vertically moving pipe or by free discharge through a bushing with a guide pipe providing the center flax fall concrete mix. The concrete rising from below presses the protective sheath against the walls of the well, ensuring a tight fit of the shell to the ground and the absence of pockets. The use of the invention will simplify the device of the protective sheath, apply cheap materials widely produced by industry, which will reduce the cost of work by 2%; . The invention of the method of construction of a bored pile, predominantly ntecTBeHHp in subsiding and swelling soils, including the drilling of a well; Installing a flexible protective sheath into it of a non-wetted non-wetted material wound in a cylinder bound to non-wettable material and laying concrete, characterized in that 5 7157116 easier installation of the protective shell, crepe-Sources of information, blade folded into the cylinder are taken into account during the examination ow goth by putting it in elastic. Gmoshinsky V. G. Industrial methods a ring connected to the outer turn of the web-erection of pile foundations. TsNIIPI, on and with cables, and during the installation process 5, p. 28 fig. 9; ten. the shells of her inner coil lift up. 2. Authorship of the USSR on application spinning canvas. № 2528636 / 29-33, class. E 02 D 5/38, 03.10.77.