RU2517303C2 - Method to control opening of lock joint of metal sheet piles and device for its realisation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to construction, namely, to drive metal sheet piles into earth, and more specifically to control of quality of the specified process, related to rupture (opening) of a lock joint at depth. The method to control opening of a lock joint of sheet piles consists in driving a sheet pile into earth, and the sheet pile has locks with the inner cavity, and submersion of the next sheet pile into the earth. Prior to driving of piles into soil to the inner cavity of the metal sheet pile, at the side of pile insertion into soil, they place a signal device with source of oscillations with varied frequency, at the same time period of signalling device operation exceeds the time of pile driving. The pile is driven, the receiver of oscillations is installed on the upper end of the pile, and the signal is received from the source of oscillations. Prior to driving of the next sheet pile on the inner side of the free lock they install a signalling device, comprising a wedge-shaped body facing with a sharp end down, on which at the side of the short cathetus there is a source of oscillations. When the next pile is driven, its lock, as the signalling device placement depth reaches the previous pile by the edge of its inner cavity, breaks the source of oscillations, and oscillations are no longer accepted by the receiver, which means that the lock of the specific pair of metal sheet piles during submersion does not open. If when the next pile is submerged to the depth of installation of the signalling device at the next pile the receipt of oscillations continues, it means the lock joint of this pair of sheet piles in the soil thickness broke (opened).

EFFECT: provision of detection of a break (an opening) in depth of soil of lock joints of metal sheet piles during their submersion.

3 cl, 1 dwg

Description

The invention relates to a method for driving into the ground metal sheet piles, and more specifically to quality control of the specified process associated with the rupture (divergence) of the castle joints at a depth.

For the installation of sheet pile walls, profiles are most often used, which differ in cross section, the device of the lock and its location relative to the profile itself. The tongue may be a Z- and U-shaped profile. In addition, when a dowel is driven into the locks, deformations occur, and the forces can increase to such values that the dowel joint ruptures at a certain depth (arrangement of foundation pits and lowering. Knaupe V. Per. With German MF Gubin; Ed. V.N. Burlakova, V.V. Sorokina. - M .: Stroyizdat, 1988 .-- 376 p., Ill.). One way to prevent tearing is to prevent soil from entering the internal cavities of the locks of metal sheet piles connected to each other.

Known invention (Moulin J.-M., Ricks A. The method of fixed joining sheet piles. Patent for the invention of the Russian Federation No. 2262572), in which the gap between the locks of the metal sheet piles formed by the longitudinal groove of the head of one lock and the inner cavity of another lock is omitted welding electrode and weld in this gap between themselves the locks of metal sheet piles.

There is also known a prototype method for driving sheet piles into the ground (Moulin J.-M., Ricks A. A method for driving sheet piles and a device for closing and sealing the inner cavity of a sheet piling lock. Patent for the invention of the Russian Federation No. 2254416), which uses at least one lock with an internal cavity into which a pipe closing device is inserted into the ground before driving the sheet pile into the ground, providing for subsequent removal of the pipe from the internal cavity of the castle and immersion in the soil of the next metal sheet pile with a ball, and before that, before installing the sheet pile in the ground, the pipe is inflated and the open longitudinal slot of the inner cavity of the castle is sealed, and the pipe is lowered to remove the inflatable pipe from the inner cavity of the castle of the sheet pile. The device for closing and sealing the internal cavity of the lock of a metal sheet pile has a pipe placed in the internal cavity of the castle. The technical result of the invention consists in reliable protection of the inner cavity of the tongue-and-groove lock of the pile from the ingress of soil into it using a closing device.

The disadvantage of these methods is the remaining possibility of rupture (discrepancy) of metal sheet piles when driving piles into heterogeneous soils. At the same time, the soil and water permeability of the castle joints can increase in those cases when, during the driving process, the tongue comes across large inclusions in the soil (boulders, etc.), as a result of which one element can jump out of the castle of another, twist the tongue or the castle.

No methods have been identified for determining such gaps (discrepancies) at depth.

The aim of the invention is the detection of a gap (discrepancy) in the depth of the soil of the castle joints of sheet piles when they are immersed.

The technical result is the placement on the inner side of the locking joint of a metal sheet pile of a signaling device, which ensures the fact of non-popping of the lock of neighboring metal sheet piles by determining the moment when the driven pile reaches a certain depth.

The design of the proposed signal device and the implementation scheme of the proposed method are shown in figure 1, which indicates:

1 - signaling device

2 - wedge-shaped body,

3 - source of oscillations with a variable frequency,

4 - mount

5 - metal sheet pile

6 - lock with an internal cavity,

7 - the next sheet pile

8 - oscillation receiver.

The method is as follows.

Before driving piles into the ground on the inner cavity of the castle (6) of a metal sheet pile (5) using a fastener (4), which is in the form of a welded or glue seam, a signal device is placed on the side of the pile entering the soil, which contains the sharp end pointing down wedge-shaped body (2), on which from the side of the short leg (2a) a vibration source with a variable frequency (3) is placed. The wedge body is connected by a long leg (2b) with a fastener (4) to a pile (5). The operating time of the signaling device exceeds the pile driving time. The pile is driven in a known manner, an oscillation receiver (8) is installed at the upper end of the pile and a signal is received from the oscillation source (3). Before driving the next sheet pile, an alarm device (1) is installed on the inner side of the free lock.

When the next pile (7) is clogged, its lock (6) when the depth of the signal device of the previous pile is reached by the edge of its internal cavity, breaks the vibration source (3) and the vibration reception by the receiver (8) stops. This fact indicates that the lock of a specific pair of metal sheet piles during immersion did not split. If during the immersion of the next pile to the depth of the signal device on the previous pile, the reception of vibrations continues, then this indicates a break (divergence) of the castle connection of this pair of sheet piles in the thickness of the soil.

Claims (3)

1. The method of controlling the divergence of the locking connection of the sheet piles, which consists in driving into the ground a sheet pile having locks with an internal cavity, immersing the next sheet pile with locks in the ground, characterized in that before driving the piles into the soil on the inner cavity of the lock of the sheet pile, from the side of the entry of the pile into the ground, place a signal device with a source of oscillation with a variable frequency, while the operating time of the signal device exceeds the time of driving piles, pile pile, set pr the oscillation receiver at the upper end of the pile and receive a signal from the vibration source, and before driving the next sheet pile on the inner side of the free lock, a signal device is installed containing a wedge-shaped body facing down with a sharp end, on which the vibration source is located on the side of the short leg, and when the next pile its lock upon reaching the depth of placement of the signal device of the previous pile with the edge of its internal cavity breaks the source of oscillations and the reception of oscillations of the receiver com stops, which indicates that the lock of a specific pair of metal sheet piles during immersion did not diverge, while if the immersion of the next pile to the depth of the signal device on the previous pile continues to vibrate, this indicates a break (discrepancy) of the castle connection a given pair of sheet piles in the thickness of the soil. 2. The signal device according to claim 1, characterized in that on the side of the long leg the body of the signal device is connected to the inside of the pile lock by means of a fastener. 3. The signal device according to claim 2, characterized in that the fastening is made in the form of a weld or glue line.