Method of construction of vertical drains

FIELD: agriculture.

SUBSTANCE: method comprises twisting the device for drain formation in the ground or soil to the desired depth. The device consists of dual hollow tubes. The outer tube has uniformly spaced protrusions of constant rectangular section rigidly fixed on the lateral cylindrical surface along the helical line with a constant pitch. After reaching the desired depth by the device, the inner tube together with the cohesive soil is removed from the outer tube to form a hollow space. The soil is removed from the inner tube. Then the inner tube is wrapped with anti-suffusion material and placed back into the hollow space of the outer tube. Then filter material is poured. The dual outer and inner tubes as filled with the filter material are twisted using a handle.

EFFECT: increased efficiency and productivity in the construction of vertical drains in cohesive soils.

4 cl, 7 dwg

 

The invention relates to the field of engineering and agriculture. Intended for the construction of vertical drains in cohesive soils.

There is a method of digging holes in granular soils [1]. The method is characterized by the fact that in the soil or the soil to the desired depth twirl device. The device consists of a double hollow tubes. The disadvantage of this technical solution are:

- granular soils are highly permeable, so there is no need to arrange a vertical drains;

to use this method for water drainage is not effective due to the possible collapse of the walls of the hollow pit.

The closest technical solution is a way of digging pits in cohesive soils [2]. The method is characterized by the fact that in the soil or the soil to the desired depth twirl device. The device consists of a double hollow tubes. The outer pipe has evenly spaced protrusions constant rectangular cross-section rigidly mounted on a lateral cylindrical surface along a helical line with a constant pitch. After reaching the device to the desired depth of the inner tube together with cohesive soil withdrawn from the outer tube with the formation of the hollow space. The disadvantage of this technical solution are:

to use this method to divert water inefficiently due to possible falling of the article is NOC hollow pit.

The purpose of the invention is the increased efficiency and productivity in the construction of vertical drains in cohesive soils.

This objective is achieved in that on the soil surface installed a special device for the construction of vertical drains (Fig.1). The device consists of a double hollow pipe, the outer pipe has evenly spaced protrusions constant rectangular cross-section rigidly mounted on a lateral cylindrical surface along a helical line with a constant pitch. In the upper part of the tubes are holes in which to insert the handle (Fig.1, 2). Rotational effort applied to the handle, which results in a rotation of the device for the construction of vertical drains and burying it in a coherent soil or the soil to the desired depth. Efforts can kiss pairs from different sides of the handle. Then the inner tube together with a cohesive soil is removed from the outer tube and forms a hollow space (Fig.3, 4). Forth from the inner tube to remove the soil, and below it wrapped protivosudorozhnym material (Fig.5). The inner tube is placed back into the hollow space of the outer pipe, and then fall asleep in it the filter material, and a dual outer and inner pipes as falling asleep filter material twisting by using the handle (Fig.6). Kacha is the firmness of the filter material you can use sand, gravel or crushed stone.

As protivokorrozionnoe material can be used geotextiles. Task protivokorrozionnoe material is to prevent the mechanical driving of the vertical drains.

The proposed method can be used to make vertical drains depth of 1÷3 m (Fig.7).

Arm length depends on the magnitude of the required force needed to rotate and burial of a special device.

In Fig.1 shows a device for the construction of vertical drains, General view; Fig.2 - section L-L of Fig.1; Fig.3 shows a device for the construction of vertical drains in the context of Fig.4 shows a device for the construction of vertical drains at the time of extracting the inner rough ground in the context of Fig.5 shows a device for the construction of vertical drains at the time of lowering of the inner pipe wrapped with protivosudorozhnym material in the context of Fig.6 shows a device for the construction of vertical drains covered with filter material in the context of Fig.7 shows a vertical drena in the section.

Device for the construction of vertical drains installed on the surface of the earth 1. The device consists of a double hollow tubes, the outer tube 2 and inner tube 3. Outer tube 2 has projections 4 is rigidly fixed on a lateral cylindrical surface the displacement is along a helical line, and at the top of the outer tube 2 and inner tube 3 has openings 5, which are inserted in the arm 6. After penetration of the device at the desired depth of the inner pipe 3 together with the ground 7 is removed and forms a hollow space. Next, the inner tube 3 wrapped protivosudorozhnym material 8 and is placed back into the hollow space of the outer tube 2, and then fall asleep filter material 9.

The method of construction of vertical drains is carried out as follows. On the soil surface 1 is installed (Fig.1). The device consists of a double hollow tubes, the outer tube 2 has evenly spaced protrusions 4 a constant rectangular cross-section rigidly mounted on a lateral cylindrical surface along a helical line with a constant pitch. In the upper part of the pipe has holes 5 into which is inserted the handle 6 (Fig.1, 2). Rotational effort applied to the handle 6, which results in a rotation of the device for the construction of vertical drains and burying it in a coherent soil or soil 1 at the desired depth. Efforts can kiss pairs from different sides of the handle. Then the inner tube 3 together with cohesive soil 7 is withdrawn from the outer tube 2 and is formed hollow space (Fig.3, 4). Forth from the inner tube 3 remove the ground 7, and below it are wrapped around protelos the fusion material 8 (Fig.5). The inner tube 3 is placed back into the hollow space of the outer tube 2, and then fall asleep in it the filter material 9, and a double outer 2 and inner tube 3 as sleep filtering material 9 twisting by means of a lever 6 (Fig.6). As the filtering material 9 can use sand, gravel or crushed stone.

As protivokorrozionnoe material 8 can be used geotextiles. Task protivokorrozionnoe material 8 is to prevent the mechanical driving of the vertical drains.

The proposed method can be used to make vertical drains depth of 1÷3 m (Fig.7).

Arm length 6 depends on the magnitude of the required force needed to rotate and burial.

The proposed solution has a wide range application, effective analogues, and is more economical.

Sources of information

1. The patent of Russian Federation №2492605, IPC A01B 1/00, A01B 5/04. The method of digging pits in loose soils / Lamerton, Z.; statements. 17.02.2012; publ. 20.09.2013 (similar).

2. The patent of Russian Federation №2492605, IPC A01B 1/00, A01B 5/04. The method of digging holes in cohesive soils / Lamerton, Z.; statements. 17.02.2012; publ. 20.09.2013 (prototype).

1. The method of construction of vertical drains, characterized in that in the soil or the soil to the desired depth tightening device consisting of SDV is built of hollow tubes, outer of which has evenly spaced protrusions constant rectangular cross-section rigidly mounted on a lateral cylindrical surface along a helical line with a constant step, after the device the desired depth of the inner tube together with cohesive soil withdrawn from the outer tube with the formation of a hollow space and is removed from the soil, then the inner tube wrapped protivosudorozhnym material and placed back into the hollow space of the outer pipe, and then fall asleep filter material, and a dual outer and inner pipes as falling asleep filter material twisting by using the handle.

2. The method according to p. 1, characterized in that the filtering material you can use sand, gravel or crushed stone.

3. The method according to p. 1, characterized in that as protivokorrozionnoe material can be used geotextiles.

4. The method according to p. 1, characterized in that the depth of the vertical drains 1÷3 m



 

Same patents:

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FIELD: irrigation building, particularly for laying collector-and-drainage system in the case of high ground water level (which is below plough-layer).

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EFFECT: increased capacity and drain laying quality, as well as following drainage operational efficiency.

4 cl, 4 dwg

Drainage system // 2273692

FIELD: building and irrigation and drainage construction, for agricultural land, underground building parts, roads, and slopes reclamation.

SUBSTANCE: drainage system comprises perforated drainage pipe connected to drain web having extensions, filtering diaphragm and thickened parts in joint areas. The thickened parts are provided with through orifices for bolts receiving. Nuts are screwed on the bolts. Drainage pipe has horizontal slot with bent upwards ends in which drain web in installed.

EFFECT: improved draining efficiency and increased speed of excessive water draining from ground.

2 dwg

FIELD: land reclamation, particularly to lay drain collection system in zones having ground water level above drainage laying level.

SUBSTANCE: method involves loosening fertile ground layer along drain laying axis; digging out channel; forming kerbs of excavated fertile ground; developing trench with chain working tool performing reverse rotation without ground lifting to surface; laying drainage pipe; backfilling the trench and the channel. Pulp consisted of crashed ground and water is extracted from lower trench part during drainage laying and the extracted pulp is supplied into channel or to surface of material used for trench backfilling. Device comprises basic machine, active working tool rotated in reverse direction, drainage pipe tray, box-like hopper with front cutting part, namely knife including post and plowshare. Suction dredge is installed inside the plowshare. Suction dredge has suction line communicated with zone between active working tool and knife through windows formed in front plowshare section. Pressure supply pipeline is communicated with distribution pipelines through intermediate pipeline and bypass gate operated by lever mechanism.

EFFECT: increased productivity and quality of drainage laying in water-saturated ground.

2 cl, 2 dwg

FIELD: mining, particularly to protect building structure built of clay ground against flooding in the case of bedded mineral deposit mining under the structure.

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EFFECT: increased clay ground dewatering and structure protection against flooding.

2 dwg

FIELD: agriculture.

SUBSTANCE: method comprises lying the drain system with the converging drains on the control section, making observation gates within the converging drains, observing the parameters of the operation of the drain system, and comparing the parameters with the permissible values. The drains are provided with mouth and source sections of parallel drains. The lengths of the source and mouth sections of the parallel drains are chosen to be no less than the half of maximum distances between the sources and mouths of the converging drains, respectively.

EFFECT: enhanced precision of control.

1 cl, 1 dwg

FIELD: agriculture.

SUBSTANCE: method comprises making diverging drainage canals in the area to be drained. The mouths of the bed sections are connected with the collector through the underground pipelines. The flow rates are measured and water is sampled in the mouths of the underground pipelines and in the mouths of the canal section beds connected to the collector. The concentrations of contaminants in the samples is measured, and the results are compared with the permissible values.

EFFECT: reduced labor consumptions.

1 dwg

FIELD: mining, particularly to protect objects to be developed and located in shifting basing against flooding with ground and surface water.

SUBSTANCE: method involves forming water-receiving excavations made as drains, pits or wells; draining and removing water; predicting ground surface relied after ground deformation before underground work performing; marking out flat shifting basin bottom and zone characterized by maximal relief depression; forming pit in area of maximal relief depression; arranging water drain at shifting basin boundary; forming ground water removing wells. Pit volume, well depth and well pitch are determined from mathematical relations.

EFFECT: increased efficiency.

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