SU935556A1 - Apparatus for simulating strain-stress state of retaining walls - Google Patents

Description

The invention relates to experimental studies of retaining walls.

A device for determining soil pressure on a model of anchored retaining walls and fences, containing a tray mounted on the foundation, a node ^{5 to} create a vertical load on the backfill, soil pressure sensors and recording device, anchor beam, engine and drum [1].

The disadvantages of this device are the need to build large-scale models for the exact reproduction of soil pressure, the need to build walls of great length compared to height to reduce ¹⁵ friction of the soil along the side fences.

A device is also known for modeling the stress-strain state of retaining walls, including _m models of rocky foundation and retaining wall, soil backfill with side rails fastened by Anke-j frames to each other, connected to load-bearing devices by rods consisting of metal rods and elastic elements , frame [2]. The disadvantage of this device is the need to build a long model in order to reduce the effect of soil friction on the side fences. The purpose of the invention is to increase the accuracy of modeling and reduce the sta-. model bridges.

This goal is achieved by the fact that the side rails are made of rectangular plates located with gaps between themselves, which are overlapped by elastic material.

In FIG. 1 shows a device, a General view; in FIG. 2 - node 1 in FIG. 1, in FIG. 3 is a section AA in FIG. 2.

The device is a frame 1, model 2 of a rock base, model 3 of a retaining wall (sluice), soil backfill 4, side rails 5, anchors 6, elastic material 7, traverses 8, hydraulic jacks 9, 10 rji 10, consisting of metal rods 10 and elastic elements 11.

The device operates as follows.

They make and install in the frame 1 models 2 and 3 of the rock base and retaining wall (lock chamber), then on the sides of models 2 and 3 install a side fence 5 having holes for fixing anchors 6. After installing each horizontal row of side fence 5 and seals the gaps with elastic material 7, a layer of sand is laid between them. They are connected to loading devices using model 2 and 3 rods, as well as anchors 6, to reproduce the weight of the rock, concrete, hydrostatic and weighing pressures on the retaining wall, backfill pressure. Zero readings for instruments are taken, the loads on the model are reproduced, working readings are taken.

The proposed implementation of the device allows to increase the accuracy of modeling and reduce the cost of the model by reducing its length.

935556 4

Claims (2)

The invention relates to experimental studies of retaining walls. A device for determining the pressure of soils on a model of anchored retaining walls and fences is known, comprising a tray mounted on a foundation, a vertical load on a roll, a ground pressure sensor and a recording device, an anchor beam, a motor and a drum 1. The disadvantages of this device are the need to build large-scale models to accurately reproduce the pressure of the soil, the need to build walls of a large extent as compared to the height to reduce the rubbing of the soil on the side fences. It is also known a device for modeling the stress-strain state of retaining walls, including models of a rocky foundation and a retaining wall, soil backfilling with side fences fastened together by means of load-carrying devices gami, consisting of metal rods and elastic elements, frame t2J. The disadvantage of the device is the construction of a large model with a reduction in the ratio of the ground training on the side barriers. The purpose of the invention is to increase the accuracy of modeling and reduce stan- dard. bridge model. This goal is achieved by the fact that the side fences are made of rectangular plates arranged with gaps between themselves, which are covered with an elastic material. FIG. 1 shows a device about & HWP4 in FIG. 2 — node 1 in FIG. 1, in FIG. 3 - section A-A on PVC. 2. The device is a frame 1, model 2 of the rocky base, model 3 of the retaining wall (sluice), soil barrier 4, side rails 5, anchors 6, elastic material 7, traverse S, hydraulic jacks 9, t ryi consisting of metal rods 1O and elastic elements 11. The device operates as follows. They make and install into frame 1 of models 2 and 3 of the rocky base and retaining wall (chamber of a chygnose), for t & l from the lateral sides of models 2 and 3 they install a side fencing 5, anchoring holes of the anchors 6. the barrier 5 and the gaps are sealed with an elastic material 7, a layer of sand is laid between them. They are connected to load devices by means of models model 2 and 3, as well as anchors 6, to reproduce the weight of the rock, concrete, hydrostatic and pressure pressure on the retaining wall, and backfill pressure. Zero readings are taken from the instruments, the loads on the model are reproduced, working readings are removed. The proposed implementation of the device makes it possible to increase the accuracy of the VIA modems and to reduce the cost of the model by reducing its length. The invention of the device for modeling the stress-strain state of retaining walls, including models of rocky base and retaining wall, lining with lateral fences, fastened together by anchors, connected to load devices by means of metal rods and elastic elements, characterized in that, in order to increase the accuracy of modeling and reduce the cost of the model, the side barriers are made of rectangular plates arranged with gaps between them oh, which are covered with elastic material. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 746024, cl. E O2 B 1/02, 1973. 2. A. Nefedov. Design and experimental studies of the stress-strain state and strength of high-pressure sluices at rocky conditions. Sat Proceedings of Hydroproject, No. 74, Butbr, 198O, 935556 S J five L (f ten FIG. 2