RU48571U1 - DEVICE FOR DIVING THE Casing PIPE IN THE SOIL - Google Patents

Abstract

The device for immersing the casing pipe into the ground is intended for use in the construction industry. In particular, for the construction of the foundations of bridges in the riverbed without drainage. The device for immersing the casing pipe into the ground includes a rotary lancet cantilever structure and a carriage mounted on it. The carriage can move along the horizontal guides of the rotary lancet cantilever structure, and is fixed in place by the locking mechanism. A vertical rail for casing installation is mounted on the carriage. Soil in the casing pipe is selected by the grab, and the pipe itself is immersed in the well by shock drilling.

Description

The device for immersing the casing pipe into the ground is intended for use in the construction industry. In particular, for the installation of bored piles of shore protection structures.

It is known that when drilling piles are installed, wells are pre-drilled, a reinforcing cage is placed in them, and the well is filled with concrete mixture.

Modern drilling methods allow you to quickly and economically develop and remove soil in a variety of geological conditions to a great depth. Two main methods of well drilling are used: rotational and shock (B.V. Bobrikov, I.M. Rusakov, A.A. Tsarkov "Construction of bridges", Moscow, "Transport", 1987).

During rotary drilling, the rock in the bottom of the wells is drilled with various types of drills, rotating with a rotor through rigid rods lowered into the well or with turbodrills, and extracted with ejectors, screws or using forced circulating clay solution. To protect the borehole wall in dispersed soils, casing pipes are used that are immersed in the borehole by rotating the rotor. Rotary drilling is carried out using drilling rigs. For example, the TsNIIS drilling unit, or MBS-1.7. Drilling rigs are equipped with stationary platforms, including a guide for installing a casing pipe, a rotor, a telescopic drill rod, hydraulic rod for immersion and rotation of the casing pipe. For placement of drilling equipment, soil islands, scaffolds on piles or floating pontoon dies are arranged. When drilling piles are installed in water areas, for casing against water, along the axis of each well, a casing or reinforced concrete shell, which is part of the pile structure, is immersed in the bottom soil. The drilling method of arranging wells is very effective, and is characterized by high productivity. However, along with the obvious advantages, rotary drilling has serious disadvantages. Drilling rigs cost about one and a half million dollars. Transportation of the installation to the place of drilling piles is very expensive, and for the installation of the drilling rig it is necessary to arrange special sites. The use of drilling rigs is justified when it is necessary to drill many wells in areas with a relatively even relief, but using them to construct a small number of wells, moreover in areas with uneven terrain - in ravines, river floodplains - is irrational and impossible.

As a prototype, you can choose the method of shock drilling. During shock drilling, the rock in the bottom of the well is destroyed or loosened by the blows of a bit, chisel or drill-grab that is discharged from a certain height, and it is removed from the well by chisels, grabs,

as well as airlifts and hydraulic elevators. A type of shock drilling is shock-rope drilling, in which a bit or drill-grab is suspended on a steel cable from special machines and cyclically dumped into the face. To fasten the walls of dispersed soils, steel casing pipes are used, immersed in the well as it deepens and removed as it is filled with concrete mix. Before filling the casing with concrete, a reinforcing cage is installed in it. Shock-rope machines (UKD) of the “Kato” type, made in Japan, domestic-made machines SP-45, BS-2, or UGB-3 UKA manufactured by the Novocherkassk Machine-Building Plant, or a dragline excavator, are used for shock drilling. The UKD machine is equipped with a device that includes a platform structurally rigidly connected to the skeleton of the machine and equipped with a vertical guide for installing casing pipes. The shock drilling method is relatively inexpensive, but, again, it is impossible to use it when installing channel supports without the use of drainage measures. Due to the fact that the casing pipes are removed from the well, to raise the concrete support above the ground level, it is necessary to additionally use special formwork, for example, sliding formwork. When constructing concrete supports in riverbeds and ravines, the use of shock-rope machines is limited due to the finite length of the machine boom. Support can be arranged only in the reach of the machines.

The purpose of the utility model is to reduce the cost of construction of shore protection structures and reduce the time of their construction.

This goal is achieved using a device for immersion in casing soil. The device is made in the form of a rotary cantilever structure mounted on the axis of rotation of the base plate. The boom of the rotary cantilever structure is equipped with a counterweight and supporting elements, and the vertical guide for installing the casing is mounted on the carriage with a locking mechanism that moves along the horizontal guides of the boom.

Figure 1 shows the front view of the device, where the rotary cantilever structure 1, with an arrow 2 mounted on the axis of rotation 3 of the base plate 4. The boom of the cantilever structure is equipped with a carriage 5, movable along horizontal guides and a counterweight 6. For stability of the device during work, it the arrow is equipped with supporting elements 7.

Figure 2 shows the horizontal projection of the device, where the AV arc described by the end of the boom with radius R, CD is the design line along which the shore protection structure should be built.

Figure 3 shows a fragment of the design of the boom span with a carriage,

where 8 is the horizontal guide boom, 9 is the vertical carriage guide for installing the casing 10, 11 is the carriage stop mechanism.

A device for immersing the casing pipe in the soil works as follows:

Before performing work, the device is mounted on the shore of a reservoir, sea, river, etc. Moving the carriage along horizontal guides to the place of the future support, it is fixed with a locking mechanism. After that, the casing is lowered into the vertical guide of the carriage. A boom grapple is hung on the boom cable of a shock-rope machine (dragline), and from a certain height it is thrown several times into the casing and removed from it, pouring out the captured soil. A well is formed. Then the drill-grab is detached, and a driven head is installed on the casing end with a dragline. Then, a driven shell clings to the cable, which from a small height throws itself several times on the driven head, thereby immersing the casing to a depth selected by the drill-grab. The indicated cycle is repeated until the design depth is reached. After that, the reinforcing cage is lowered into the casing and poured with concrete mixture. So work continues until the boom of the device reaches the place of work. The area of work performed is limited to the sector enclosed between the arc AB, described by the end of the boom with radius R and the project line CD, along which the shore protection structure should be built. When the erected support is outside the reach of the boom, the device is moved to a new location. Thus, using available equipment, it is possible to build the foundations of bridges or the shore protection wall from bored piles in the conditions with the most difficult terrain, without taking water away from the erected structure.

Claims (1)

A device for immersing the casing pipe into the ground, including a platform with a vertical rail for installing the casing pipe, characterized in that the platform is made in the form of a rotary lancet cantilever structure mounted on the axis of rotation of the base plate, the boom of the rotary cantilever structure having a counterweight and supporting elements, and the vertical guide for installing the casing is mounted on a carriage with a locking mechanism that moves along the horizontal guides of the boom.