SU135099A1 - Tunnel lining tester - Google Patents

Description

Apparatuses are known for testing tunnels of tunnels and shafts, in which the lining ring is subjected to active pressure within a certain part of the perimeter, and the rest is provided with reactive pressure through the filling ground between the outer lining contour and the hard concrete ring of the bench. However, these devices have significant drawbacks, one of which is the possibility of bulging up of the filling soil during testing due to the absence of the end wall of the stand. Another disadvantage is the inability to take into account the influence of the weight of the lining, due to the horizontal arrangement of the stands and the lining. In addition, the well-known stands are designed to test the roundabout flow of deep-laid and round-shaped tunnels, or lining of mine shafts.

In the proposed device, these disadvantages are eliminated. The filling ground is between the walls, the tray of the reinforced concrete structure of the device and the distribution plates.

The stand's construction is positioned vertically and the lining is placed vertically in the device, i.e., as it works in natural conditions.

Fig 1 shows the proposed device in cross section; in fig. 2 - the same, in a longitudinal section.

The proposed device includes longitudinal reinforced concrete walls /, connected by transverse walls only in the upper part, and in the lower part, the slopes remain unclosed; the upper supporting beam 2 and the lower anchor beam 3. The beams overlap at the top with two crossbars 4 and at the bottom with two crossbars 5 interconnected by steps 6.

The hydraulic jacks 7 abut against beams 2 and transfer pressure to the backfill 8 through distribution plates 9. Backfilling 8 lies around the test lining 0, and under the lining it is compacted and has concrete TRAINING 1 under the test lining 10.

№ 135099

 2

Subject invention

A device for testing a lining of a tunnel according to a method that reproduces the natural conditions of its operation using jacks in a stand, hp, and with which most of the contour of the lining is subjected to reactive backfill pressure between the outer surface of the lining and the the purpose of eliminating the possibility of bulging backfill during the test and new and the degree of reproduction of natural conditions by taking into account the influence of the weight of the lining, its stand is installed vertically and equipped with rods providing reactive pressure from bottom to top connecting the crossheads located above the upper thrust run, in which hydraulic jacks with distribution plates are supported, as well as crossbars installed in the tray part of the stand under the longitudinal proton, over which a relatively large layer of backfill distributes reactive load. on the lower part of the shell, installed in the stand in a position in which it is usually mounted in a tunnel pit.

Tehred A. A. Kamyshnikov Editor M. A. Mrochko

Sub. to pec. P.111-61 g. Format boom. 70xl08 / i6Volume 0.7 serv. nl

Zak 3022 Circulation 450Price 3 col.

TsBTI at Ko.mitete according to the invention and discoveries

under the Council of Ministers of the USSR, Moscow, Center, M. Cherkassky Lane, 2/6.

Tiiografy TsBTI Committee on Inventions and Discoveries at the Council of the Ministry of Construction. THE USSR,. Moscow, Petrovka, 14, Proof-reader EF Schwarz Date: 06/11/2001

Number of pages: 2

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