Method of making pile in pre-perforated hole

 

The invention relates to the construction, namely, Foundation, and can be used during the construction of piled foundations in weak water-saturated clay soils in conditions of unfettered urban sprawl. Method of making pile in pre-perforated hole includes education borehole jacking casing with a lost Shoe, filling her full height of the concrete, the device broadening, removing the casing pipe and the installation of the reinforcement cage. What is new is that the ground pushes the casing with a sealed end and a valve at the top and fill the casing with concrete through the valve, raise the casing to a height of 1.5-2.0 diameter pipe with simultaneous delivery of concrete to fill the widening suit by pushing the casing pipe of concrete in the ground and removing the casing pipe perform static load with simultaneous flow in the casing of compressed air through the valve. Technical result provided by the invention, is to provide the possibility of manufacturing a printed piles with extended fifth in a weak clay soils near existing buildings with high carrier spacem the method also allows dynamic effects on weak clay soil and surrounding buildings to produce printed pile with extended fifth. 1 C.p. f-crystals, 6 ill.

The invention relates to the construction, namely, Foundation, and can be used during the construction of piled foundations in weak water-saturated clay soils in conditions of unfettered urban sprawl.

A known method of construction of pile foundations piles of factory manufacturing, excluding harmful dynamic impact development (Perley E. M. and other Pile foundations and buried structures in the reconstruction of existing enterprises, Leningrad, stroiizdat, 1989, S. 27-34).

According to the method of prefabricated piles plunge into the ground static pressing load. When the pile static pressing load is compaction of the soil around the piles and bearing capacity of pile foundations if this does not differ from the carrying capacity of pile foundations, built the traditional method of driving piles disalvatore.

However, piles of factory made depending on the length and method of reinforcement of concrete B-25, B-35 and reinforce the entire length of the pile. High strength piles must provide transportation to the construction site is included manufacturing is usually not more than 30%, and the armature is in its lower part in the absence of horizontal forces and significant moments doesn't work at all.

The closest to the method of the invention is a method of producing piles in pre-bottomed well, including education borehole jacking casing with a lost Shoe, filling her full height of the concrete, the device broadening, removing the casing pipe and the installation of the reinforcement cage (Perley E. M. and other Pile foundations and buried structures in the reconstruction of existing enterprises. Leningrad, Stroiizdat. 1989, S. 22-24).

After curing of the concrete bearing capacity of the soil such piles without extended heel identical score, and the broadening may be higher in 1,5-2,0 times. However, compared with fabricated piles, can be achieved by reducing cement consumption 1.2-1.5 times, metal 2.5-3.0 times.

Along with the above-noted advantages of this method may be unacceptable in terms of unfettered urban development and, especially, during construction on soft soils, near existing buildings because of the possible softening of soil Foundation as a result of vibraphone and vibroisolating casing, vibratrim is the service ramming piles with extended fifth in a weak clay soils near existing buildings, with high load capacity and more economical in the consumption of cement and steel in comparison with the pile of factory manufacturing.

The problem is solved by a method for manufacturing pile in pre-perforated hole includes education borehole jacking casing with a lost Shoe, filling her full height of the concrete, the device broadening, removing the casing pipe and the installation of the reinforcement cage, characterized in that the ground pushes the casing with a sealed end and a valve at the top and fill the casing with concrete through the valve, raise the casing to a height of 1.5-2.0 diameter pipe with simultaneous supply of concrete to fill the widening suit by pushing the casing pipe concrete in the ground, and removing the casing pipe perform static load with simultaneous flow in the casing of compressed air through the valve. When this reinforcement cage is immersed in fresh concrete by using vibrators.

Technical result provided by the invention, is to provide the possibility of manufacturing a printed piles with extended fifth in a weak clay soils near susestudio with a pile of factory manufacturing moreover, the method also allows dynamic effects on weak clay soil and surrounding buildings to produce printed pile with extended fifth.

The invention is illustrated by drawings, where:

in Fig.1 - immersion of the casing with a lost Shoe method of indentation;

in Fig.2 - filling the casing with concrete;

in Fig.3 - rise of the casing to a height of 1.5-2.0 d with simultaneous delivery of concrete to complete the filling of the casing;

in Fig.4 - dip casing and the device broadening the penetration of concrete into the ground;

in Fig.5 - removing the casing;

in Fig.6 vibrophone reinforcing cage in freshly placed concrete.

Method of making pile with a lost Shoe, and broadened the fifth in a pre-bottomed wells (PCA) is implemented as follows.

Immerse the casing 1 with a lost Shoe 2 and sealed by the cap 3 by the method of indentation (Fig.1). Through the valve to supply concrete 4 fill the casing with concrete (Fig.2). Raise the casing to a height of 1.5-2.0 pipe diameter d with simultaneous delivery of concrete to complete the filling of the casing (Fig.3). Immerse the casing and arrange broadening the penetration of concrete into the soil (Fig.4). Retrieve ruzena reinforcing frame 5 using the vibrator 6 in freshly placed concrete 7 (Fig.6).

Claims

1. Method of making pile in pre-bottomed well, including education borehole jacking casing with a lost Shoe, filling her full height of the concrete, the device broadening, removing the casing pipe and the installation of the reinforcement cage, characterized in that the ground pushes the casing with a sealed end and a valve at the top and fill the casing with concrete through the valve, raise the casing to a height of 1.5 - 2.0 diameter pipe with simultaneous delivery of concrete to fill the widening suit by pushing the casing pipe concrete in the ground, and removing the casing pipe perform static load with simultaneous flow in the casing of compressed air through the valve.

2. The method according to p. 1, characterized in that the reinforcing cage is immersed in fresh concrete by using vibrators.

 

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FIELD: building, particularly pile foundation building.

SUBSTANCE: method involves drilling well; placing inventory casing pipe in well, wherein casing pipe has closed lower end and is provided with inventory electrical discharger; feeding concrete mixture in well and initiating high-voltage electrical discharges in well along with removing casing pipe and forming shaft. Well is formed by driving inventory casing pipe in ground; sealing casing pipe from top thereof and arranging check valves used for concrete mixture pouring, for supplying pressurized air and water, in upper pile part; forming channels for concrete mixture passage in casing pipe; providing above channels with self-opening valves. Electric discharger is fixedly connected to casing pipe so that discharger extends beyond lower part thereof and form lower casing pipe end closed when casing pipe is driven in ground. Inventory casing pipe is driven in ground and lower end thereof is deepened in support layer by pressing action combined with high-voltage electric discharge energy. Casing pipe is removed from ground and shaft forming is performed simultaneously with pulling static load application, feeding compressed air and initiating electrical discharges in concrete mixture.

EFFECT: increased load bearing capacity of cast-in-place pile.

6 dwg

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