SU1249164A1 - Ferroconcrete lining of underground structure walls - Google Patents

Description

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The invention relates to the construction of underground structures of a large cross section erected by the river and under pressure from groundwater, and can be used in the construction of hydraulic engineering and transport tunnels, underground machine buildings of hydroelectric power stations, rooms for lifting gates to water conducting tunnels, etc.

The aim of the invention is to simplify the construction and increase the reliability of the lining.

1 shows a tunnel, a cross-section; Fig 2 - a node on

4ig. one.

The tunnel 1 of width B and height H has a reinforced concrete lining of the vault 2 and walls, which in height consists of separate longitudinal plates 3 of monolithic reinforced concrete. The plates are homogeneous with each other, forming a building seam A, inclined towards the rock, and hooks of 5 reinforced concrete anchors 6, homogeneous in the host rock mass 7, are embedded in the upper part of the bottom plate 7. The hooks of the anchors are hooked to the reinforcement 8 of the bottom plate 3 , reinforcement 8: the upper slab is interrupted within its limits and the construction joint 4 does not cross.

The thickness, brand of concrete, the number of reinforcement bars and anchors are determined by calculation or on a model from equivalent materials, taking into account the size of the structure and the geotechnical and hydrogeological conditions of the occurrence of tunnels.

The lining of the walls is carried out as follows.

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12491-64.2

After tunnel tunneling, the arch of the vault and walls, made in the form of armored structures, for example, grids or reinforcement cages, are installed. Then install the formwork and concreted lining of the vault 2 and the walls 3 of the upper rus. At the same time, the foundation under the walls in the concreting unit is made with a slope towards the rock wall of the rock mass 7.

The tunnel 1’s lower Russian tunnel passes through, and under the bottom of the wall lining 3 of the upper russa, a well is drilled and anchors 6 with hooks are mono-molded in them.

15 5, On the anchors, they hang an arm-structure 8 of the lining of the walls of the 3 lower rus and concrete the wall by supplying a concrete mixture to the wall with the beveled lower end of the lining of the wall of the 3 upper ru.

After concreting the walls 3 between the upper and lower russes, a dense construction ground 9 is formed 9. If necessary, this joint can

25 to be additionally compacted by injecting it into a monolithic compound, for example, a cement or epoxy composition.

Under the pressure of underground

30 waters the lining of walls 3 moves within the limits of elastic deformations in the direction of generation of tunnel 1 and interacts with the lining of tray 9, roof 2 and anchors 6, while operating according to the scheme of beam plates with half-clamped embedment. The inclined building joint 4 provides reliable support of the bottom wall 3 of the upper tier under the action of the pressure of the earth's waters on it.

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FIG. 2

VNIIPI Order 4211/32 Circulation 470 Subscription Arv-polygr. pr-tie, Uzhgorod, st. Project, 4

Claims (1)

REINFORCED CONCRETE WALLS OF UNDERGROUND CONSTRUCTION WALLS, erected along the tiers, including individual tiered reinforced concrete slabs adjacent to the rock and monolithic to each other with strips attached to the rock, different from the fact that, in order to simplify the design and increase the reliability of lining, strips-closers are made in the form of a single design with lower reinforced concrete slabs, and anchors are embedded in the upper part of these slabs, while the joint of the tiers of reinforced concrete slopes is inclined towards the rock, decreasing from production. SU „„ 1249164