SU1427037A1 - Arrangement for loading earth mass with tangent load - Google Patents

Abstract

The invention relates to the construction, in particular to the testing of soil foundations. The purpose of the invention is to increase the accuracy of research. The device consists of a stamp with sections I, stops 2 and hydraulic cylinders 3. Sections 1 have racks 4. Hydraulic cylinders 3 have devices for vertical movement and step fixation between racks 4 sections 1. 5 ip.

Description

FIG. one

The invention relates to the construction, in particular to the technique of testing ground bases.

The purpose of the invention is to improve the accuracy of research.

FIG. 1 shows the device, a side cut; in fig. 2 is a section A-A in FIG. one; in fig. 3 - a device with an indication of specific values of the loads and the place of their application, a side section; in fig. 4 is a plot of tangential stresses under the dies; in fig. 5 - die sections with devices for moving and fixing hydraulic cylinders.

The device includes a stamp consisting of sections 1, stops 2, hydrotspindra 3 and measuring devices for recording movements of dies (not shown),

Each section 1 of the stamp is equipped with a stand 4, and the stamp is equipped with an adaptation. By means of vertical movement and step fixation of hydraulic cylinders 3 between posts 4 sections 1 parallel to the sole 5 of the punch at different heights from it. These devices are made in the form of clamps 6, fixed with rails 7 on cross-arms 8. Reiki 7 can be fixed on cross-arms 8 in any position with the help of clamps 9,

The device works as follows.

On the surface of the ground are established sections 1 of the stamp and fastened to the ground with a sole 5. Then,

stops 2 are installed. Between sections 1 and between the extreme sections 1 and stops 2, hydraulic cylinders 3 are mounted, which are fixed at the required height using clamps 6j

rails 7 and 8 traverse mounted on the upper ends of the racks 4.

The force developed by each pair of hydrodalindriders 3 is determined by the formula.

t „;: - Z: F + T

where T "is the effort that must be developed by hydraulic cylinders, t; - the required specific tangential load, t / m, F. - the area of all stamp sections installed to the right of the hydraulic cylinders, m j

T - the required magnitude of the force

between the last stamp and the right stop, t In the case of five sections 1 of stamps, the area of the sole 5 of each of which is 0.4 m, with the force T between the last stamp and the stop equal to 2 tons and € 10 t / m. T, 22 t; T 18 t;

T, 14 t; t 10 t;

Tu 6 t.

The height of the application of forces above the sole of the 5 sections of the I punch is determined from the absence of an overturning moment using the formula

- I

 -AND

Zp-Tp

P + 1

)

0

five

0

with

P

where a is the height of the application of force above the sole of the punch developed by the hydraulic cylinders to the left of the section, m; T is the force developed by the hydraulic cylinders located to the left of the section; TJ a is the height of application of force above the sole of the punch developed by the hydraulic cylinders to the right of the section, m;

T, is the force developed by the hydraulic cylinders, set to the right of the section. Provided a, 0.1 m;

a 0.122 m; a 0.157 Mj a, 0.219 m; a 0., 366 m; a 1,098 m1

If during tests it is required to carry out a stepwise increase in load, then in proportion to increase the load in each hydraulic cylinder.

Claims (1)

Invention Formula A device for loading an array of soil with a tangential load, including a sectional punch, stops, hydraulic cylinders for loading sections, and measuring devices, characterized in that, in order to improve the accuracy of research, each stamp section is equipped with a counter, and the punch is equipped for a vertical recession space and step fixation is hydro- parallel to the sole of the punch on the cylinders between the posts of the sections of personal height from it. Thebes, h FIG. 2 2g ..  WO that Fik.Z Г 10Т / Ц2     З // У / Л //} (// Л  II W III / fTlin / rjy 7 // in III 711 III III 56 Phie. five