SU1469149A1 - Method of constructing tunnel lining of solid injected concrete - Google Patents

Description

(21) 4178684 / 23-03

(22) 01/08/87

(46) 03/30/89. Bul № 12

(71) Moscow Institute for Exploration and Design of Engineering Structures Mosinzhproekt

(72) S.F. Pankina, Yu.M. Samokhvalov, Yu.S. Senderovich and A.V. Sivan &

(53) 622.281 (088.8)

(56) .Marenny Ya.M. The tunnels. M: Transport, 1985.

International Construction.1971, No. 12, p. 21-24.

(54) METHOD OF CONSTRUCTION OF A TUNNEL COVER FROM A MONOLITHIC PRESS CONCRETE (57) Invention; refers to mining and mb; used to construct tunnels with monolithic press concrete lining with prestressed steel reinforcement. The purpose of the invention is to simplify the process and improve the quality of the lining. To accomplish the goal, the supply of reinforcement wire 1 for longitudinal reinforcement is carried out with its prestressing. In this case, the subsequent wire feed 1 into the annular gap between the inner surface of the shield 9

and the pressing ring 8 is carried out with its simultaneous stress. Before pressing, the wire is fixed in the end of the lining 21. Reinforcing wire 1 is placed in the annular grooves of the rollers 6 and 7, which are installed evenly around the circumference on the pressing ring 8. The rollers 6 and 7 are bent, the wire 1 is passed between the inner surface of the shield 9 and the hydraulic jacks 10 to form longitudinal reinforcement 18, With the coil 19 with reinforcement wire 1 separately located in the shaft 4, wind off the wire 1 and cut off

one

The invention relates to mining. to business, namely to; construction of underground utilities, and can be used for the construction of tunnels with lining. Of monolithic press concrete with prestressed steel reinforcement.

The purpose of the invention is to simplify the process and improve the quality of the lining.

FIG. 1 shows a schematic shield

by means of which SPO g

a longitudinal section in FIG. 2 is a section A-A in FIG. one,

The method is carried out as follows.

Before construction, for example, a collector, rebar-Loku 1 is wound from coils 2 located evenly around the circumference on the flange 3 - installed in the shaft 4. At the same time, tensile forces arise in wire 1, since free rotation of coils 2 inhibits their axle brake. Reinforcing wire 1 is placed in annular grooves 5 of rollers 6 and 7, installed evenly around the circumference on the pressing ring 8, bending around them, passing the wire between the inner surface of the shield 9 and the hydraulic jacks 10 installed between the rings 11 and 12 ts to rings 8 and 14 in such a way that between the inner surface of the shield 9 and the rings 11 and 12 there is an annular

long enough to make a transverse reinforcement ring. A length of wire 1 is set at the longitudinal reinforcement 18 located at the inner surface of the shield 9, forming a ring, which is welded and receive a ring of transverse reinforcement 20, which is welded to the longitudinal reinforcement 18 at the points of their intersection. The feeding of the reinforcing wire 1, its tension and location between the inner top of the shield wall 9 and the pressing ring 8 ensure the correct and

 t its fucking arrangement in the body of the concrete lining after pressing .. 2 Il.

2

clearance for reinforcement. Next, the reinforcement -wire 1 is passed through an annular gap between the pressing ring 15 mounted on the rods 16 of the hydraulic jacks 10 and the inner surface of the shield 9. through the shuttering space above the formwork 17, after which the reinforcing wire is anchored on the flange 3, forming In this way, the longitudinal reinforcement 18. With the coil 19 separately located in the shaft 4, also filled with the reinforcing wire 1, the length of wire 15 long enough to make a ring is reeled off and cut off. transverse reinforcement. This piece of wire is made up of the longitudinal reinforcement 18 located at the inner surface of the shield 9, forming a ring, 20 ends of which are welded and receive a ring of transverse reinforcement 20, which is welded with the longitudinal reinforcement 18 at the points of their intersection. Thus, in the section AB (the length of which is 25 equal to the course of the jackplate)

sets the required number of transverse reinforcement rings 20 with the same distance between them. After that, the development of 30 rrunts is carried out, the lining 21 is erected by feeding through the concrete line 22, through the window 23 in the formwork 17. concrete mix, closing the window 22 by the gate 24, pressing the concrete mass by pressing Tsom 15. Then the shield is moved by the stroke of the jack . Moving,

the shield will leave a lining -21 of monolithic press concrete with longitudinal and transverse reinforcement. In this case, the reinforcement wire 1 will be removed from the coils 2 and enter the shield for longitudinal reinforcement. The armature from the section AB with rings of cross-section reinforcement 19 is displaced as a result of the shield movement by the stroke of the jacks 10 and in the section AB (the section of longitudinal reinforcement using rollers 6.7 and ring 12) in this way set the cross-section reinforcement . Then the entire described process of building the tunnel is repeated. I

In the longitudinal reinforcement 18, when coiling it from coils 2, tensile forces arise, which increase due to the fact that the wire 1, the passage through the rollers 6 and 7, changes direction. As a result, the lining 21 is obtained with pre-stressed reinforcement.

The supply of reinforcement, its tension and location precisely between the inner surface of the shield wall, the pressing ring and the o6ecne4trBa formwork

0

five

0

0

five

The correct, desired location in the body of the concrete of the lining after pressing.

F o r mule: inventions

A method for constructing a tunnel lining from a monolithic press-concrete, which includes excavation using a shield with a sliding formwork, injecting the concrete mixture into the backfill space with preliminary feeding of reinforcement wire for longitudinal and transverse reinforcement, pressing the concrete mixture into a press. ring and moving the shield with sliding formwork, characterized in that, in order to simplify the process and improve the quality of the lining, the reinforcing wire dp of the longitudinal reinforcement is supplied with its prefabrication and then fed into the annular gap between the inner surface of the shield and the pressing ring with simultaneous tension of the reinforcing wire, and before pressing, the wire is secured to the end of the lining.

needles

Claims (2)

Claim A method of constructing a tunnel lining from a monolithic press concrete, including the development of soil using a shield with sliding formwork, injection of concrete mix into the formwork space with preliminary feeding of reinforcing wire for longitudinal and transverse reinforcement, pressing concrete mixture with a pressing ring and moving the shield from sliding formwork, characterized in that, in order to simplify the method and improve the quality of the lining, the supply of reinforcing wire for longitudinal reinforcement is carried out with preliminary by tensioning and subsequent feeding in the annular ring 25 a gap between the inner surface of the shield and the pressing ring with the simultaneous tension of the reinforcing wire, and before pressing, the wire is fixed at the end of the lining. FIG. 2 'Compiled by L. Berezkin