SU35421A1 - Device for determining the coefficient of sedimentation of soil under static load - Google Patents

Description

be further verified by additional research.,,

On . Figure 1 shows the scheme of operation of the normal load applied to the middle of the beam; FIG. 2 and 3, the proposed device for determining the coefficient of subsidence of the soil under static load, u / schematic view in two projections; FIG. 4- longitudinal section of the device in a constructive implementation; FIG. 5 is a top view of it; FIG. b-view of his side.

The basis for the proposed instrument is the following. It is known from the theory of beams on an elastic foundation that with the length of the beam

k .А СЬ, where «1 / (where is the width of the beam, beam Ea-its rigidity), concentrated P, applied in the middle of the beam, bends it, as shown in FIG. one.

-H) chevidao, eTHE € cdi attach to ka

some beam of a given section of some load I and fix zero

points C and D (points with zero strain

cie) i.e. find the value of the segment C)

HZ, TotO: formula, you can find the required coefficient for subsidence of soil A:

0:. (2)

      W

If the optic beam is a take off of a rectangular section, of height A, then formula (2) will lead to the entry: j

I RIZ

.C 32.4. (20

The proposed "device for determining the coefficient of subsidence of the soil, consisting of an iron frame composed of three curved bands 1, connected by spacers .2 and angles 3, and a centrally located rod 4, fitted at the top with a platform for the narrow,

this rod 4 is not associated with the aforementioned -stain and supporting -part 5,; on which one and the other

goy story from - rod 4 slide t.

engines, with attached to the indicators 6. The latter are used for fig “satsy nulevykh sediment experimental tshast nok. Plates 7, laid directly on the ground, are not connected to the design of the instrument. : /: G, 1:

As a model of the foundation, a plate can be used not only, but BUT: and, a rigid platform of any shape in which it allows a wide, and explores the question; about; influence on the coefficient C of the form | odment For these experiments, it is sufficient to use the middle part of the device, as a result of which indicators 6, in this case, do not participate in the range, the sediment of the rigid foundation model is read with a high degree of accuracy (to 0; 01

 The preferred device, compared with other systems, is different from the inventor's opinion, has the advantageous advantages, is easy to handle and is quite portable. :,

From the form) s :-( 2) 1, it follows that the responsibility of C does not depend on: .from the load / value of which, therefore; wc but not, int p1 0vats. However, in the checks; the results of the results are everybody. once; fixing the load P and ω (:: the deposition of the plate n (UV) on the rod I.); The test formula is the following formula, given in the theory of beams on an elastic base:

 -0.545 "P: y.

 Gb

Similar (calculation is necessary for each for any other EO village of the beam, and the formula for the addendum in this case is: -.

) c ..

in this: form e: (4) - .Jf- osMtaiiaieTipac: standing: section from the point cC, well, in a second form. -For the determination of the Yead | 15 in the needles, Serving for fixes and places with zero score,. sp € 1 (ia {1s.4.4 microns by Ometres, juzssiTs) sufficiently accurately measure the oss {i, dl, anybody; .., cross-sections of an experienced i beam.

By, worldr. At ul-yuv:, these calculations are not followed by another