SU1237743A1 - Apparatus for measuring soil strain - Google Patents

Description

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The invention relates to soil mechanics and can be used to measure soil deformations at the base of a foundation or structure.

The aim of the invention is to improve the measurement accuracy due to a more reliable attachment of grades in the borehole walls and their repeated use.

For immersion in the well 25, the ring marks 2, in the closed position of their blades 6, are put on the inventory rod 5 from below and secured with their protrusions 13 in the notches 23 with the required pitch. When assembled, inventory rod 5 with ring marks 2 attached to it is lowered into well 25. At the desired depth, rotating rod 5 counterclockwise, the protrusions of ring marks 13 abut against the walls of the through channels, while gear gear 12, which engages with gears, rotates. toothed rails 7, and extends the rails with blades 6 mounted on them while

FIG. 1 shows schematically the device, a general view; in fig. 2 - inventory bar, general view; in fig. 3 - magnetic mark, longitudinal section; in Figures 4, 5 and 6, sections A-A, B-B is and B-B in FIG. 3, respectively; in fig. 7 - section G-Y in FIG. four; in fig. 8 - magnetic mark with extended blades, cross section.

A device for measuring the deformation jg blades that enter the walls of the borehole 25 of the ground contains a guide tube that securely fixes in it annular bu 1 with annular marks 2 on it, magnetic marks 2. Then inventory measuring device 3 with sensor 4 and inventory rod 5. Kol25 equalizing pipe 1 and fixing it in the borehole bottom 25. A measuring device 3 is mounted on the reference beam 17, the sensor 4 of which is lowered on the measuring tape 19 of the tape measure 18

30 into the cavity of the guide tube 1. When the sensor 4 passes through the ring marks 2 when the magnetic field of the magnetic field reverses the ring magnets 16, the reed switch closes, thus closing the power supply and fire circuit 35

Target marks 2 are equipped with three retractable blades 6, attached to the toothed rails 7 by rivets 8. The brand body consists of the lower 9 and top 10 parts. The upper and lower parts of the housing of the brand are connected with screws 1 t. Inside the stamp between the upper and lower parts there is a rotary gear and a sleeve 12, provided with internal projections 13. On the lower part of the mark there are protrusions 14, closing the channels along which the toothed rails move, which at the same time play the role of a lock. In the lower part of the dirt mark, there are guide channels 15, along which the toothed rails move, and ring magnets 16 are installed. Measuring device 3 is mounted on a reference beam 17 and contains a tape measure 18 with a measuring tape 19, a light bulb 20 and a sensor 4 in the form of a reed switch, the magnetically controlled ring magnets 16 attached to the free end of the measuring tape 19 and the wire 21 connected; signal lamp 20. Inventory rod 5 is provided with longitudinal side through channels 22 and side grooves 23, made on opposite sides, and an additional groove 24 is made at the lower end of rod 5. Guide pipe 1 with ring marks 2 is installed in well 25, drilled through the hole 26 of the foundation 27.

rod 5 is removed, and instead of it, through holes of marks 2 are inserted nap40

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The control light 20 is in motion, at this moment the readings are taken from the tape 19 of the tape measure 18. When the sensor 4 is raised, the measurements are repeated. The average values of the counts during descent and lifting determine the true position of the ring marks 2 relative to the reference beam 17. The absolute movements of the marks 2 determine by taking into account their movements relative to the reference beam 17.

To reuse the device for measuring the deformations of the soil, the measuring device Z. is removed from the reference beam 17, and annular marks 2 are removed from the guide tube using the inventory rod 5. When the rod 5 is lowered into the well 25, the rod is pulled through the lateral through channels 22 to the projections 13 ring marks. By turning the rod 5 clockwise, the protrusions 13 are introduced into the grooves 23 of the rod, and this causes the gear ring 12 of the ring mark to rotate, which

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A device for measuring soil deformations works as follows.

For immersion in the well 25, the ring marks 2, in the closed position of their blades 6, are put on the inventory rod 5 from below and secured with their protrusions 13 in the notches 23 with the required pitch. When assembled, inventory rod 5 with ring marks 2 attached to it is lowered into well 25. At the desired depth, rotating rod 5 counterclockwise, the protrusions of ring marks 13 abut against the walls of the through channels, while gear gear 12, which engages with gears, rotates. toothed rails 7, and extends the rails with blades 6 mounted on them while

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The jg blades enter the walls of the well 25 and securely fix ring magnetic marks 2 therein. Then the inventory blades enter the walls of the well 25 firmly fix ring magnetic marks 2 therein. Then the inventory

rod 5 is removed, and instead of it, through holes of marks 2 are inserted nap

The control light 20 is in motion, at this moment the readings are taken from the tape 19 of the tape measure 18. When the sensor 4 is raised, the measurements are repeated. The average values of the counts during descent and lifting determine the true position of the ring marks 2 relative to the reference beam 17. The absolute movements of the marks 2 determine by taking into account their movements relative to the reference beam 17.

To reuse the device for measuring the deformations of the soil, the measuring device Z. is removed from the reference beam 17, and annular marks 2 are removed from the guide tube using the inventory rod 5. When the rod 5 is lowered into the well 25, the rod is pulled through the lateral through channels 22 to the projections 13 ring marks. By turning the rod 5 clockwise, the protrusions 13 are introduced into the grooves 23 of the rod, and this causes the gear ring 12 of the ring mark to rotate, which

the turn drives the crissal slats 7 with the blades 6 fixed to them. The blades come out of the walls of the well 25, and the mark is closed. When the rod is raised, the protrusions 13 of the annular mark are inserted into the grooves 24 of the rod, and the mark is removed from the well along with the rod. When the ring mark 2 is removed to the surface of the rod 5, it is removed from it. The downstream brands 2 are extracted from the well 25 in a similar way.

The proposed device can be used repeatedly cp. soil deformation measurements. This reduces the labor, materials and time spent on research, as well as their cost.

The use of grades with three blades makes it possible to more accurately fix them in the walls of the well, which affects the accuracy of the measuring scientific research institute.

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Claims (2)

1. DEVICE FOR MEASURING SOIL DEFORMATIONS, including a guide tube, a cylindrical inventory rod with side grooves and ring marks equipped with blades, and a measuring device, characterized in that, in order to increase the accuracy of measurement due to more reliable fastening of the marks in the walls of the well and their repeated use, each brand is equipped with a rotary gear cage with an internal protrusion and gear racks and is made integral in the form of upper and lower interconnected parts, lower of which there are through channels for accommodating the gear racks, the cylindrical inventory bar is made continuous with through channels from the opposite sides and an additional groove in the lower part, while the cage is located between the upper and lower parts of the brand and interacts with the gear racks, and the blades are mounted on gear racks with the possibility of their extension. 2. The device pop. 1, characterized in that the through channels in the lower part of the brand are located at an angle of 60 to each other. ё с • м м со