SU1038878A1 - Plant for determination of frozen ground compressibility in thawing - Google Patents

Plant for determination of frozen ground compressibility in thawing Download PDF

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Publication number
SU1038878A1
SU1038878A1 SU823382274A SU3382274A SU1038878A1 SU 1038878 A1 SU1038878 A1 SU 1038878A1 SU 823382274 A SU823382274 A SU 823382274A SU 3382274 A SU3382274 A SU 3382274A SU 1038878 A1 SU1038878 A1 SU 1038878A1
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SU
USSR - Soviet Union
Prior art keywords
compressibility
frozen
thawing
soil
stamp
Prior art date
Application number
SU823382274A
Other languages
Russian (ru)
Inventor
Владимир Кузьмич Иноземцев
Владислав Дмитриевич Карлов
Виктор Николаевич Пугач
Original Assignee
Ленинградский Ордена Трудового Красного Знамени Инженерно-Строительный Институт
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Application filed by Ленинградский Ордена Трудового Красного Знамени Инженерно-Строительный Институт filed Critical Ленинградский Ордена Трудового Красного Знамени Инженерно-Строительный Институт
Priority to SU823382274A priority Critical patent/SU1038878A1/en
Application granted granted Critical
Publication of SU1038878A1 publication Critical patent/SU1038878A1/en

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Abstract

INSTALLATION FOR DETERMINING 5: FROZEN ZHIMAEMOSTI: SOIL during thawing, comprising a base with kanleroy for ground and a guide cylinder nonconducted material, hollow die, liquid thermostat lever unit and static loading indicators o.tlichagoscha in that, for the purpose of expansion range of studies and increase their reliability, it is equipped with a U-shaped frame and mounted on it a device of dynamic action, having a lifting mechanism and an electromagnetic coil unit with mymi therein cores soedinenHfcWH KON1I1M by means of plates with a load, and the stamp is provided with a diaphragm with a convex O 5 in a hollow cylindrical portion and disposed in a cavity DOI) vibration pick the cylinders. / o: er eo Ch EO

Description

The installation for determining the compressibility of frozen soil during thawing is in the field of foundation engineering, in particular, the study of the compressibility characteristics of frozen soils during thawing. It is known a device for testing soil samples for compressibility, consisting of a vibrating platform on which is sealed to a container, containing a chamber with a soil sample and a hydraulic device to create static pressure on the test soil sample 1. This device cannot be used for determination of the compressibility of frozen soils in view of the fact that their designs do not provide a simulation of the process of thawing samples of frozen r1) unta. In addition, they allow soil samples to be tested only with harmonic oscillations, and such a loading scheme does not simulate the impact dynamic effects most frequently encountered on construction sites during production operations. Closest to the proposed. is a compression unit for determining the compressibility of the soil permafrost during thawing, including a base with a chamber for soil and a guide cylinder of non-thermal, conductive material, hollow core, liquid thermostat, latch ydTroy static loading and indicators 2. Known installation does not allow testing thawing samples are subjected to shock loadings on them, which narrows the range of studies of frozen soils and does not provide testing of soils under conditions close to natural. The purpose of the invention is to expand the range of research and increase their reliability. This goal is achieved by the fact that an installation for determining the frozen value of frozen soil during thawing, comprising a base with a chamber for. the soil and the cylinder direction from a non-heat-conducting material, a hollow stamp, a liquid thermostat, a static load lever device and indicators, is equipped with a U-shaped frame and a dynamic action device mounted on it, having a mechanism for its operation and an electromagnetic coil unit with cores moving in them the ends by means of a slab with a load, and the iggamp is equipped with a diaphragm with a part convex in the form of a hollow cylinder and a vibration sensor located in the cylinder cavity. Figure 1 shows the proposed installation, the overall look; Figure 2 is the same side view; on fig.Z - basis-: stamp and die, section. The fixture for determining the compressibility of the frozen soil during thawing includes base 1, fastened by means of a threaded joint with the guide cylinder 2, inside the base 1 there is a chamber 3 for accommodating the guide cylinder 4 and a sample of frozen soil 5. Stamp 6 mounted on the soil sample 5, provided with a diaphragm 7 with a part 8 and convex in the form of a hollow cylinder; placed in the cavity of the cylinder 9 by the vibration sensor 10. The installation is equipped with a U-shaped frame 11 and a device mounted on it, dynamically {6th exposure, and a lifting mechanism 12, a block. 13 electromagnetic coils with cores 14 connected by a plate 15, with a load of 16. For creating a static load on ground 5 there is a lever mechanism 17 with .rpy-i connectors 18, and to measure the characteristics of compressible soil, indicators 19. Installation for determining frozen -, th soil during thawing works as follows. . A sample of the frozen soil 5 is installed in the chamber 3 of the base 1, onto which the guide cylinder 2 is screwed and a stamp 6 is placed on the sample of the frozen soil 5. At a predetermined height corresponding to a certain intensity of dynamic effects with the inclusion of a liquid bridge (not shown), the b stamp is filled with water and the process of thawing of the frozen ground 5 begins. Che es remote control unit 13 GelektromagnitnyhG podklyuchavtg coils to a power source (not shown). In the switched on state, the electromagnet coils 13 pull in the metal cores 14, thereby lifting the load 16 to the given height, in the ironed state they lower the gear 14, as a result of which a free fall of the load 16 occurs. 16, stamp 6, the latter combines an oscillating motion and transmits them to a sample of thawing soil 5. CONTROL PANEL connects block 13: electromagnetic coils to the power source and turns them off according to the setting frequency and number of strokes, Defolations

Claims (1)

  1. INSTALLATION FOR DETERMINING THE COMPRESSIBILITY OF A FROZEN SOIL DURING THAWING, containing a base with a soil chamber and a guide cylinder made of non-conductive material, a hollow die, a liquid thermostat, a lever device for static loading and indicators, о. characterized by the fact that, in order to expand the range of studies and increase their reliability, it is equipped with a U-shaped frame and mounted on it with a dynamic impact device having a lifting mechanism and a block of electromagnetic coils with cores moving in them, connected at the ends by means of a plate with weight, and the stamp is equipped with a diaphragm with a convex in the form of a hollow cylinder § part and a vibration sensor placed in the cylinder cavity.
SU823382274A 1982-01-18 1982-01-18 Plant for determination of frozen ground compressibility in thawing SU1038878A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU823382274A SU1038878A1 (en) 1982-01-18 1982-01-18 Plant for determination of frozen ground compressibility in thawing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU823382274A SU1038878A1 (en) 1982-01-18 1982-01-18 Plant for determination of frozen ground compressibility in thawing

Publications (1)

Publication Number Publication Date
SU1038878A1 true SU1038878A1 (en) 1983-08-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU823382274A SU1038878A1 (en) 1982-01-18 1982-01-18 Plant for determination of frozen ground compressibility in thawing

Country Status (1)

Country Link
SU (1) SU1038878A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316671B (en) * 2014-10-10 2016-05-18 同济大学 A kind of experimental rig that measures artificial freeze thawing soil frost-heave force and frost heaving amount

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
1. Патент JP 49-27473, кл. U 01 N 33/24, 1974. 2. Руководство по определению физических, теплофизических и механических характеристик мерзлых грунтов, М., Стройиэдат, 1973, с. 119. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316671B (en) * 2014-10-10 2016-05-18 同济大学 A kind of experimental rig that measures artificial freeze thawing soil frost-heave force and frost heaving amount

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