A method of manufacturing a printed piles

 

(57) Abstract:

The invention relates to the field of construction and is used for the manufacture of piles. The method includes drilling, filing into the well-hardening material and excitation supplied hardening the material of the high-voltage electric discharges a working gap with the change of the pulse energy, the movement of the discharger in the borehole and the formation of the broadening. What's new is that before applying hardening material is injected into the well waterproof, crushable under the action of high-voltage electrical discharges shell and passing through the zone of freezing, the pulse energy does not change. The technical result of the invention is to increase the carrying capacity ramming piles and extended field of application, especially in sandy soils with low humidity. 5 Il.

The invention relates to the field of construction and is used for the manufacture of piles.

The known method of producing piles with extended fifth, including immersion in the soil of the casing, placing in the bottom of the wells of the explosive charge, the laying of the concrete mixture with a partial extraction of the casing, undermining the pipe, moreover, in the ground dipped the casing with a self-extracting tip at the closed position of the tip, and the partial lifting of the casing is performed with the disclosure of the tip, and then optionally placed concrete mix to the top of the casing, and the explosion of the explosive charge is carried out in the extraction process of the casing, which is produced with simultaneous fibrovascular [1].

The disadvantage of this method is that for broadening the heel is necessary to apply an explosive substance. Removing the casing pipe must be conducted simultaneously with fibrovascular. The soil around ramming piles above the heel almost not compacted.

There is also known a method of manufacturing a printed piles, including the drilling of wells, installation of an electric spark gap, the flow in the well-hardening material, the excitement in him a high-voltage electric discharges through a spark gap with a moving zone of excitation from the bottom up and the subsequent extraction of the gap, and the excitation discharge is carried out at the overlap of the hardening material of a spark gap [2] - prototype.

The disadvantage of this method is that in the upper part of the body is ment hardening material discharger. Therefore, in this part of the concrete will be less durable, more porous, therefore, the pile is obtained is non-uniform and therefore the bearing capacity of the piles will be lower than for piles, fully processed high-voltage discharges. In addition, production of piles by a known method in malovlazhnom Sands is hampered by the rapid dehydration injectively concrete mix in the hole, thus preventing its subsequent processing.

The aim of the invention is to increase the carrying capacity ramming piles and expansion of the scope (especially in sandy soils with low humidity).

This task is achieved by the fact that after drilling the hole injected waterproof shell and already it serves hardening material is injected working discharger and only then produce electrical discharges. This broadening of the well and the seal hardening of the material at the base of the wells produce high voltage electrical discharges more energy, then move the working spark gap and apply pulses of lower energy, then move again and apply pulses with more energy and so on until the frost line. While in the frozen zone e is pronitsaemy shell is destroyed.

The above method enables to produce ramming piles in all soil. The properties of the soil practically does not affect the process of electric discharge any effect. Moreover, it allows you to handle electrical discharges whole body piles, as has the shell and hardening material may be located above ground level in the shell, and therefore the overlap hardening material discharger can be performed in any conditions.

The invention is illustrated in the drawing, which shows one of the production versions of piles of the proposed method, a vertical incision (Fig.1-5).

In Fig. 1 depicts drilled the top hole of Fig.2 in the hole put a waterproof shell and a working spark gap of Fig.3 in a waterproof envelope introduced hardening material; Fig.4 the beginning of the production piles, the working spark gap serves high-voltage pulses of Fig.5 presents custom printed pile.

A method of manufacturing a printed piles is as follows.

Any known method produces the driving of the cylindrical bore 1 of the desired diameter and desired depth (Fig.1). After izvestnym a current conducting wire 4 (Fig.2). If reinforced, the working gap is centered inside of the reinforcement cage. Then in well with rastvorovoda pipe 5 connected to a pump (not shown), served hardening material 6 (Fig.3). After filling the wells 1 hardening material 6 on the working spark gap 3 pulses of high voltage from the pulse current generator (not shown) (Fig. 4), creating a powerful hydraulic shock. As ening well the level of hardening of the material in the well is reduced and its replenishment is carried out between a series of impulses. When applying for a work discharger pulses with higher energy are formed broadening of larger diameter 7 (Fig.4, 5), and when applying for work discharger pulses of lower energy are formed broadening of smaller diameter 8 (Fig.4, 5). After the manufacturing process of the pile reaches the freezing zone 10 (Fig.5), the energy of the pulses do not change. Thus, in the zone of freezing the pile is formed either smaller or larger diameter.

Waterproof membrane under the influence of a powerful hydraulic shock quickly destroyed, but it is already in the process of electric discharge is not affected, the-axis. Fragments waterproof shell 9 (Fig.4, 5) after making piles of any material adverse effect on the properties of the piles do not have, because they are strongly deformed and crushed.

Thus, the application of the waterproof membrane in the proposed method allows to obtain the pile, processed high-voltage discharges across the depth. Moreover, through the use of shell it is possible to form the neck of the piles above ground level, and since the pile is manufactured using high voltage electrical discharges, concrete solution in the process of formation of piles vibrating continuously subjected to the influence of electro-shock, however he strongly compacted, so the pile is uniform throughout the volume and are extremely durable. In addition, significantly expands the scope of application, especially in sandy soils with low humidity, because the properties of the soil (dehydration injectively concrete mix in the hole) have no effect on electro-discharge processes. Moreover, the formation of the neck of piles in frozen zone with one diameter of the broadening is not greatly increases the internal stresses in the pile during pravilnoy piles with extended fifth", 6 E 02 D 5/34, 5/38 from 03.01.92. Author Isaev Century. And. - Samara Institute of architecture and construction.

2. RF patent 2039156 "Method of manufacturing a printed piles", 6 E 02 D 5/34, 5/44 from 22.12.93. Authors: Gavrilov, N., Borisenkov Century. And., Evdokimov, B. C., Gavrilov, D., sole proprietorship Rita-1".

A method of manufacturing a printed piles, including drilling, filing into the well-hardening material and excitation supplied hardening the material of the high-voltage electric discharges a working gap with the change of the pulse energy, the movement of the discharger in the borehole and the formation of the broadening, characterized in that before applying the hardening material is injected into the well waterproof, crushable under the action of high-voltage electrical discharges, shell and passing through the zone of freezing, the pulse energy does not change.

 

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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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