SU759666A1 - Apparatus for making trenches and wells - Google Patents

Description

The invention relates to the field of construction and can be used in the manufacture of earthworks for pile foundations and walls of submerged structures erected by the method of 'wall in the ground'.

A device for the formation of trenches and wells, comprising a housing, a working body and expansion mechanism with a drive. , 0

The closest solution to the technical essence and the achieved result is a device for the formation of trenches and wells, including a support frame with guides, wedge, _5th working body, sealing mechanism with shoes and drive {2}.

. The disadvantages of the known devices are the large friction between the working surfaces and the ground and the failure to ensure sufficient compaction of the soil, which reduces the stability of the walls of the excavation.

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The aim of the invention is to improve the performance of the device by reducing the friction forces between the working surfaces of the device and the ground and increasing the stability of the walls of the trenches by compacting them.

To achieve the goal, the working body has a wedge slider mounted in the frame guides with the possibility of longitudinal movement and connected to the drive, and the sealing shoes are fixed on the frame with the help of the guide rods with springs, each shoe having a roller supported on the working surface of the slide.

FIG. 1 shows the device, a general view; in fig. 2 is a section A-A in FIG. in fig. 3 is a section BB in FIG. 2

The device includes a frame 1, in the upper part of which there are installed hydraulic cylinders 2. On the longitudinal beams of the frame there are reinforced guides 3 in which a wedge slider 4 is installed, connected to the rods of hydraulic cylinders 2. In the middle

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of the frame 1 mounted sealing shoes 5 which are connected to the frame 1 by means of the guide bars 6, provided with return springs 7. 5 reinforced sealing boots rollers 8. At the bottom of the frame 1, between its longitudinal beams ⁵ GOVERNMENTAL installed wedge 9 is pressed , equipped with pins 10, which are included in the depths of the lower transverse beam of the frame 1.. - ₁₀

The operation of the device for education, trenches and wells is as follows.

The device is lowered with the help of a crane-excavator in a trench, the depth of which is ₁₅ enough to immerse the device to the height of the sealing shoes 5, and the width is equal to the thickness of the pressing wedge 9.

When the hydraulic cylinders 2 are turned on ₂₀ , the movement of the wedge slide 4 in the guides 3 of the frame 1 occurs. Wedge! the slider 4 creates pressure on the rollers 8, under the action of which the sealing shoes 5 extend and produce ₂₅ compaction 'of the walls of the trench, while the return springs 7 are compressed. The extension of the shoes 5 occurs at the stroke length of the slide 4, equal to the length of its wedge part. After that, the rollers 8 of the operation _{3θ are cut} onto the working surface of the slide 4 parallel to the longitudinal plane of the device (trench walls), and the extension of the shoes 5 stops. In this position the device is distributed _"3 _ Perth trench, due to the pressing. Shoe 5 to the walls of the trench with great effort. Upon further movement of the slider 4, the lower dead-horse transfers the force developed by the hydraulic cylinder 2 to the ₄ θ batch of the wedge 9. Under the action of this effort, the wedge 9 is introduced into the soil mass. When introducing a wedge 9, the reaction of the resistance forces to the introduction is balanced by the friction forces between the ₄₅ shoes 5 and the walls of the trench. After \ extension of the rods of the hydraulic cylinders 2 to the extreme position, they are reversed. When moving the slider up 4, the device remains open in a trench as long as the rollers 8 rest on ⁵⁰ parallel surfaces of the slider 4, after they exit onto the inclined surfaces of the slider, the shoes are pulled in

5 under the action of return springs 7.

With the return of the shoes 5 to the initial position, the friction forces holding the device in the trench disappear, and under the action of the forces of gravity it lowers and rests on the pressing wedge 9.

The new reversing of the movement of the rod of the hydraulic cylinders 2 leads to the repetition of the described working cycle. After reaching a predetermined trench depth, the device is lifted by a lifting mechanism; the rods of the hydraulic cylinders 2 should be in the up position when lifting. Pressing the wedge 9 when lifting is held from falling out of the guide pins 10, which are included in the slots of the lower transverse beam of the frame 1.

For lowering and lifting the device and for supplying the working fluid, an excavator or a self-propelled crane with a hydraulic drive can be used.

The formation of trenches with the help of the device is performed by bores, the length of which is equal to the length of the device. For the formation of square bore holes under the pile device is performed appropriate width.

Claims (1)

Claim A device for the formation of trenches and wells, including a support frame with guides, a wedge working body, a sealing mechanism with shoes and a drive, characterized in that, in order to improve the performance of the device by reducing its friction forces with the ground, the working body has a wedge slider installed in frame guides with the possibility of longitudinal movement and connected to the drive, and sealing shoes are fixed on the frame with the help of guide rods with springs, each shoe having a roller supported on the working u the surface of the ram.