RU2312951C1 - Vibratory injector for narrow wall erection in ground - Google Patents

Abstract

FIELD: construction, particularly to erect walls of mortar in ground by vibratory driving method, namely to form barriers around pits.

SUBSTANCE: vibratory injector comprises bar connected with vibrator, as well as head and guiding blades arranged in lower bar part. The bar has inner cavity for binding agent supply and connection pipes. Outer ends of connection pipes have binding agent outlets. Guiding blades are made as triangular angle-plates arranged under connection pipes and fastened thereto along the full lengths thereof. The guiding blades are secured to bar.

EFFECT: simplified technology, increased ready wall stability.

10 cl, 2 dwg

Description

The invention relates to the field of construction, in particular to the manufacture in the ground by vibration absorption of narrow walls from a mortar, and can be used to create a protective fence in the development of pits.

A known vibroinjector is a device for creating a narrow slit in the ground by vibration dipping, made in the form of hollow tubes mounted in a row connected to a vibrator and equipped at the lower ends with vertically mounted flat blades (knives), the shape and size of which determine the dimensions of the slit (wall). After vibration dipping to the desired depth, the known device is removed and at the same time a binder mortar (concrete mortar) is fed into the formed slot through holes — nozzles made in the walls of hollow pipes. Repeating the operations of vibro-immersion and removal of the device in combination with forced feeding of concrete mortar into the formed gap, a narrow wall of the required length and configuration is formed (US 5141364 C1, E02D 5/18; E02D 7/18; 1992.08.25).

Known vibroinjector - a device for manufacturing in the ground by vibration absorption of narrow walls, including a hollow rod (pile driver) connected to a vibrator with a pointed tip, which is equipped with vertically mounted knives in the lower part, and holes (nozzles) for feeding an injectable cementitious mortar (building mortar, concrete) or flushing fluid are located at the tip. The shape and size of the knives determine the shape and size of the slit (narrow wall). The known device provides the supply of a binder solution through a head equipped with a means for connecting a binder solution blower to the pipeline into the hollow rod and injects it through the nozzles into the formed hole in the ground during the lifting of the rod. Repeating the operations of vibro-immersion and extraction of the known device in combination with forced injection when removing the binder solution into the formed slot or hole, a wall of the required length and configuration is formed (DE 2236901 C1, E02D 5/18, E02D 5/46, E02D 7/18, 1973.02. 22).

A disadvantage of the known devices is the unstable operation of the nozzles for supplying mortar or concrete into the formed gap or holes in the soil, since the nozzles become clogged with soil, gravel, etc. during vibration immersion. This can lead to significant time costs associated with the need to clean the nozzles of foreign objects and soil, as well as the costs associated with the need to supply nozzles with check valves. In addition, water, which may be in the formed slit or hole at the moment of supplying the binder solution therein, significantly increases the water permeability of the formed narrow wall.

The objective of the invention is to eliminate the likelihood of particles of soil entering the holes through which a binder solution is fed into the formed slot, ensuring that there is no ground water in the slot or hole in the soil at the time of the binder (cement mortar, cement paste, etc.), simplifying the technology creating walls in the ground, as well as increasing the stability of the formed walls of the pit.

The essence of the invention is a vibroinjector for manufacturing narrow walls in the ground, including a rod connected to a vibrator with an internal cavity for a cementitious mortar and a tip and guide knives located in the lower part of the rod, the rod being equipped with nozzles whose outer ends have an exit of the cementing mortar and the guide knives are made in the form of triangular scarves located under the nozzles and connected with them along their entire length, as well as with a bar. In addition, the number of guide knives is three; the nozzles are perpendicular to the axis of the rod; nozzles are inclined to the axis of the rod; two guide knives are located in one vertical plane, and the third - at an angle of 90 ° to the specified plane; the rod is equipped with three additional nozzles located perpendicular to the axis of the rod and additional guide knives made in the form of triangular scarves located under the nozzles and connected with them along their entire length, as well as with the rod; additional nozzles are made deaf; additional nozzles and additional guide knives are located at a greater distance relative to the tip; the nozzles at the ends are made with bends at an angle of 90 °; the nozzles at the ends are made with nozzles bending the flow of the binder solution at an angle of 90 °.

The invention can be illustrated by the drawings shown in figures 1 and 2, where

1 - connection of a vibroinjector with a vibrator - trailing device;

2 - the entrance of the binder solution - the place of connection of the binder solution supercharger by the pipeline;

3 - rod with an internal cavity;

4 - exits of the knitting solution;

5 - guide knives;

6 - tip;

7 - nozzles;

8 - bend of the pipe;

9 - nozzle;

10 - additional guide knives;

11 - additional nozzles made deaf;

12 - the inner cavity of the rod is a pipeline for a binder solution.

The manufacture in the ground of a narrow protective wall of the pit using the vibroinjector according to the invention can be illustrated by the following example.

Along the contour of the pit, metal sheet pile pipes - piles - are pre-hammered.

Use a vibroinjector equipped with a rod 3 with a tip 6 and with three guide knives 5 located in the lower part of the rod 3 with an internal cavity 12 (Fig. 1). Two guide knives 5 are located vertically in one plane, and the third knife is also vertical, located in a plane rotated 90 ° with respect to the plane in which the first two guide knives are located. This arrangement of the guide knives ensures that a T-shaped narrow gap is obtained in the ground. The inner cavity 12 of the rod 3 has an inlet of a binder mortar (cement mortar) 2, which is equipped with a connection to the pipe of a standard supercharger of a binder mortar. Each of the guide knives 5 is made in the form of a triangular scarf connected to one side with a rod 3, and the other side to a pipe 7, which is made perpendicular to the axis of the rod 3. The connection of the knife 5 and the pipe 7 is made along the entire length of the pipe, which ensures maximum strength designs. The outer end of the nozzle has an exit of the cementitious mortar 4. To ensure the free exit of the cementitious mortar from the nozzle, the latter at the end can be made with a bend 8 at an angle of 90 ° or with a nozzle 9 bending the flow of the outgoing cementing mortar by 90 °.

For work, provide connection 1 (through the tow hitch) of the vibroinjector according to a utility model with a standard vibrator, for example, mounted on a truck crane. Then, the vibroinjector, when exposed to a vibrator, is immersed in the ground along two adjacent piles, using them as guides. It is desirable that the distance between adjacent piles was not more than twice the length of the pipe 7. Simultaneously with the immersion of the vibroinjector through the inlet 2, the internal cavity 12, which serves as a pipeline, and the outlet 4 into the resulting T-shaped slot with a blower feed a binder solution. The supply of a binder solution at the moment of exposure of the soil particles to vibration allows you to completely fill the space between the soil particles and squeeze the enclosing water, which negatively affects the mechanical parameters of the formed protective wall, and also reduces its water permeability. After the vibroinjector reaches the desired depth, the flow of the binder solution is stopped, and the vibroinjector is removed. To create a wall, the operation is repeated using an adjacent pair of piles. After the cementitious mortar hardens, a cement soil wall of the pit is formed from T-shaped elements, which have outward protrusions well connected with the surrounding soil, which play the role of anchors and provide higher wall stability. To reduce the forces required to deepen the vibroinjector, the nozzles 7 can be made inclined with respect to the axis of the rod 3.

To create designs of narrow walls, the spatial arrangement of the guide knives of the vibroinjector, as well as their number equal to three, is optimal.

The vibroinjector allows injecting cement-based cementitious mortar into water-saturated, fine-grained, dusty sands, sandy loam and loam in a fluid state. As a result, stable cement-soil monolithic narrow walls are formed, which have high strength and anti-filtration characteristics and ensure high-quality and safe development of the pit.

Claims (10)

1. A vibroinjector for manufacturing narrow walls in the ground, including a rod connected to a vibrator with an internal cavity for a cementitious mortar and a tip and guide knives located at the bottom of the rod, characterized in that the rod is equipped with nozzles, the outer ends of which have an exit of the cementitious mortar, and the guides the knives are made in the form of triangular scarves located under the nozzles and connected with them along their entire length, as well as with a bar. 2. The vibroinjector according to claim 1, characterized in that the number of guide knives is three. 3. The vibroinjector according to claim 1, characterized in that the nozzles are perpendicular to the axis of the rod. 4. The vibroinjector according to claim 1, characterized in that the nozzles are located obliquely to the axis of the rod. 5. Vibroinjector according to any one of claims 1 to 4, characterized in that the two guide knives are located in one vertical plane, and the third is at an angle of 90 ° to the specified plane. 6. The vibroinjector according to claim 1, characterized in that the rod is equipped with three additional nozzles located perpendicular to the axis of the rod, and additional guide knives made in the form of triangular scarves connected to additional nozzles and to the rod. 7. The vibroinjector according to claim 6, characterized in that the additional nozzles are made deaf. 8. The vibroinjector according to claim 6, characterized in that the additional nozzles and additional guide knives are located at a greater distance relative to the tip. 9. The vibroinjector according to claim 1, characterized in that the nozzles at the ends are made with bends at an angle of 90 °. 10. The vibroinjector according to claim 1, characterized in that the nozzles at the ends are made with nozzles bending the flow of the binder solution at an angle of 90 °.

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