SU1401140A1 - Shield-driven tunnel - Google Patents

Abstract

The invention relates to the construction of tunnels constructed by the shield method, and m. used in the undermined territories. The goal is to increase reliability in operation with significant horizontal movements of the compartments. The tunnel is divided into compartments by tight expansion joints 5 with primary 1 and secondary 2 lining. Dividing zones with a plane of 3 slides are made between them. One of the lining of the assembly. Within the seams 5, the separation zone has a sheet sealer attached to one of the lining 1 and 2 to form the corresponding lining of the compensator 6 in the seam 5. The length of the slip plane 3 of the sealant is equal to the distance between the axes of the seams 5, and its ratio to the compartment length is less than the ratio the shear load along the primary lining contour with the ground mass produced to the holding load along the slip plane 3. The axes of the seams 5 in lining 1 and 2 in the initial position are displaced relative to each other by an amount determined from the expression lo & 0.5 (EpL) at 1 3 br L,: where IQ is the distance between the axis of the seams 5; EP is the calculated value of the relative horizontal deformations of the ground mass produced; Ig- - the length of the block ring team lining, mm; L is the length of the compartment, m. When exposed, ± adjacent compartments move relative to each other along plane 3, the compensator 6o operates. Reliable operation of the tunnel is ensured by the continuity of contact of compartments along the slip plane 3, the same degree of tightness of various areas of the sealant and simultaneous operation of the plane 3- slip and compensator 6 with the preservation of their integrity. 6 Il. and S (L

Description

one

: The invention relates to the construction of tunnels constructed by the thyroid method, and can be used in the territories under construction.

The aim of the invention is to increase the reliability of operation with significant horizontal movements of the compartments.

FIG. 1 shows a tunnel of shield penetration, general view; in fig. 2 - Yrodolny incision in the zone of expansion joints in the initial position in FIG. 3 - the same, when moving from fceKOB due to the impact of relative Horizontal compressive deformations | (- 6) i in FIG. 4 - the same, when moving the compartments from the influence of relative gel tolerant deformations of stretching (+), fig. 5 shows the geometrical conditions for reliable operation of the compensator without forming a through seam in FIG. 6 - the same, unreliable operation of the compensator with the formation of a through seam.

The Esitova tunnel is divided into compartments with hermetic deformation joints and includes a primary | 1- and secondary 2 lining, one of which is assembled (in Fig. 2-6 - primary 1), between which a dividing zone is made with the slip plane 3 in the form of a sheet sealer attached to one of the obnohok (in Fig. 2-4 to the secondary shedding of Ke 2) and forming in the deformation | (4 in Fig. 2-4 in the deformation | fwe 5) corresponding lining of the compensator 6. The dpina of the plane 3 slides is equal to the distance between the axes of the joints.

The tunnel works as follows.

When exposed to ± adjacent compartments move relative to each other along the slip plane 3, the compensator 6 is activated in the deformation seam 5 of the secondary lining 2, to which the sheet hermetic is attached. The reliable operation of the tunnel is provided by the displacement of the axes of the expansion joints in the primary and secondary lining relative to each other by an amount of 1, determined depending on the predicted movement of the compartments p L and the length of the modular ring of the team lining 1. This ensures continuous 402

contact of the compartments along the slip plane with the most adverse impact of + (Fig. 5), i.e., prevents the formation of a through-expansion joint (Fig. 6) and the work of the compensator on bending of the soil pressure by the design of a sheet sealant forming continuously connected to each other the areas of the 3-slip plane and the clamping device 6. This ensures the same degree of tightness of the various areas of the sheet sealant with respect to the functional purpose of the sheet sealant and a special arrangement (between the linings) and the slip plane, the placement of the compensator (in the expansion joint of the lining to which the slip plane is fixed), as well as the equality of the length of the slip plane, the distance between the axes of the expansion joints IP. This ensures effective simultaneous operation of the slip plane and compensator, while maintaining their integrity.

The ability to move adjacent tunnel sections relative to each other along the slip plane is established by comparing the resultant shear forces Fp acting on the compartment at the contact of the primary lining with the ground mass produced and the resultant holding forces F. acting on the slip plane.

Relocation happens if

or

F F,

- In.c,

where Cg - linear, per unit length of the compartment, shear load, t / m;

 S - linear, per unit length of the slip plane, holding the load, t / m. Hence, the condition for the movement of adjacent compartments along the slip plane, which determines the field of application of the invention, is.

1p.L-o

Thus, the proposed construction of a shield tunneling tunnel does not reduce the length of the compartments in the areas being worked up compared to the conditions of normal operation, which will lead to a decrease in the relative labor intensity, material intensity and estimated cost by 10–15%.

F o rmula of the invention

A tunnel of shield tunneling, including compartments separated by deformation pits with primary and secondary lining, one of which is assembled, and with dividing zones between the linings, in order to increase the reliability of the tunnel operation with significant horizontal movements of compartments , the axes of the expansion joints in the primary and secondary lining in the initial position are displaced one relative to another by an amount determined from the expression

1 „0.5 (U SpL)

at Ig- where

1 3 Ep. L, the distance between the axes of the expansion joints in per0

Rvic and secondary lining the calculated value of the relative horizontal deformations relative to the subsoil massif;

Ij- is the length of the modular ring of the team lining m; 0 L - length of compartment, m,

moreover, within the expansion joints, the separation zone between the frills has a sheet sealer attached to one of the frills to form a corresponding compensator lining in the deformation seam, and the length of the slip plane of the sealant is equal to the distance between the deformation seam axes, and its ratio to the length the compartment is less than the ratio of the shear load along the contour of the primary lining with the ground mass produced to be worked up to the holding load along the slip plane.

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Claims (1)

Claim The tunnel penetration tunnel, including compartments separated by expansion joints with primary and secondary lining, one of which is prefabricated, and with dividing zones between the lining, characterized in that, in order to increase the reliability of the tunnel with significant horizontal movements of the compartments, the axis of the expansion joints in primary and secondary lining in the initial position are displaced one relative to another by an amount determined from the expression 1 ₀ = 0.5 (¼ + E _p L) at 1 g-> 3 ε p. L; where 1 is the distance between the axes of the expansion joints in the primary and secondary lining; Ep - the estimated value of the relative horizontal deformations relative to the undermined massif; lg is the length of the block 'Ring prefabricated lining', m; L is the length of the compartment, m, and within the expansion joints, the separation zone between the lining has a sheet sealant attached to one of the lining for 15 formation in the expansion joint of the corresponding lining of the compensator, while the length of the sealant’s sliding plane is equal to the distance between the axes of the expansion joints, and 2Q its ratio to the compartment length is less than the ratio of the shear load along the primary lining contour with the undermined massif to the holding load along the slip plane . Figure 1 FIG. 2 Fi g in