DE2124662A1 - Tunnel boring equipment - Google Patents

Description

f-atfn-an-välte

d :: - 'l -' :. v martin light o _{10 / pm}

l · -: ke _:::: clo schmidt ^for Iz4bb2

L--; ^! - '. . ■■■■ .. ■■■ \ iZCH.-mO. HANSMANN

C - ■:.-.- "- KY-S. S ^ 8. Herrmann

Nv; · - '■ "M ^

i.AMjiLiiulf.riOJE OO

May 18, 1971

vRl / Lü

WILLIAM P. REES LIMITED Old Woking, Surrey England

"Tunnel boring equipment"

The present invention relates to tunnel boring equipment of the type in which a tubular shield, which may or may not have mechanical ground cutters as drilling progresses along a Tunnel is driven, the shield driving is carried out with the help of punches between anchoring points and counter-pressure points on the shield and a tunnel lining carried out section by section as the drilling progresses behind or in the rear part of the shield is inserted, Such tunnel boring equipment is hereinafter referred to as "tunnel boring equipment of the type described ".

10 9 8 5 0/1165

The invention provides tunnel boring equipment of the type described in which the punches are mounted on a cart are, which can be moved along with the stamps on the shield. Thereby facilities are provided by which in at least one position of a carriage the thrust of the stamp can be transferred to the shield.

Preferably, the cart and the shield have cooperating: Devices through which the thrust from the punches at two or more positions of the carriage along the Shield can be transferred to this.

The carriage may comprise two rings concentric with the shield and means by means of which each ring moves along the shield is movably attached, several punches, which are attached so that they the rings towards each other and move away from each other, one of the rings being able to engage the tunnel lining that is behind or is inserted in the rear part of the shield, while the other ring has means with which it is attached attacks the anchoring or counter pressure points.

This means for attacking the anchoring or counter pressure points may consist of several detachable pawls attached to the other ring.

The anchoring or counter-pressure points can be abutments which are arranged around the inner surface of the shield and point towards the rear of the shield.

109850/1165

The present invention has the advantage that the stamps can be moved forward along the shield in order to to create space at the rear of the shield for handling the liner sections, and that the The ram can also be moved backwards in order to gain access to the tunnel area during excavation or excavation to facilitate. In the case where the thrust can be transmitted in two or more positions, can furthermore, the length of the punches can be shortened, with the shield being advanced by two or more operations of the punches and the traverse between successive passes for each liner section introduced can be moved. Furthermore, it may be possible to reduce the length of the shield, which has the advantage that the Shield is easier to steer.

A special embodiment of the invention Tunnel boring equipment is described below with reference to the accompanying drawings, in which

Fig. 1 is a longitudinal section through the equipment,

Figure 2 shows cross sections through the equipment, the right side of Figure 2 being a cross section the line A-A in Fig. 1 and the left side is a section along the line B-B in Fig. i is,

Figures 3 and k are end and side elevational views of one of the roller assemblies for supporting a thrust ring;

Figures 5, 6 and 7 are end and side elevational views and a plan view of one of the guide roller assemblies of a counter pressure ring, and

109850/1165 " ^k "

Pig. 8, 9 and 10 end and side elevation views and one Fig. 13 is a plan view of one of the counter pressure anchoring units.

The equipment forming the subject of this embodiment is for use when drilling tunnels with relatively small diameters (for example about 900 to 1300 mm) and can be used in conjunction with the in the lining system described in British Patent Specification 24383/69 or with the one in the British patent | 35O88 / 69 described lining system can be used.

A tubular shield 10 is at its front end with a cutting edge 11 is provided. In the front end of the shield, a rigid sleeve 12 is attached, which is in a Step 13 ends, and a ring 14 is attached at a distance behind the step, which is cut open in four places, to form four columns 15. A resilient sealing ring 16 is provided at the rear end of the shield.

In the plate there is a carriage for four hydraulic jacks 17. The carriage includes a counter-pressure ring 18 and a compression or shear ring 20 at which the pistons are respectively f the cylinder of the hydraulic ram fixed. The counter pressure ring has four equally spaced rollers 21 which run along the inner surface of the shield, and the pressure or thrust ring has two rollers 22 which roll along the lower part of the shield. Accordingly, the carriage comprising the two rings and the hydraulic rams is movable as a unit in the longitudinal direction of the shield, and the two rings are movable towards and away from one another by operating the rams. The rollers 21 can pass through the column 15.

109850/1165 " ⁵ ~

At each attachment point of the four stamps on the counter pressure ring there is a pawl 24 which can engage behind the step 13 or behind the ring 14 to thereby to pick up the thrust from the punches.

When operating the equipment, the carriage is first moved back in the shield as far as possible in order to thereby the largest possible space at the front of the sign for the excavation or excavation of the tunnel area. Then the pawls behind the step 13 are engaged brought and actuated the punches to the ring 20 with the (not shown) last erected liner section to bring into engagement and to advance the shield a distance which is approximately equal to the stroke of the punch, which is something is more than half the length of a liner section. Then the stamps are withdrawn and the Carriage moved backwards until the pawls engage behind the ring 14. Then the stamps are extended again, to complete the advance of the shield. Then will the stamps are drawn in again and the carriage can be moved to the front part of the shield to cover the greatest possible distance To create space at the rear of the shield for the construction of the next section of lining.

Figures 3 and 4 show details of the two roller bearing units for the pressure ring 20. Each of these units comprises a fork 30 in which the roller 22 is mounted. The fork 30 is rotatably mounted at 31 in a holder 32 fastened to the ring 20. The fork has an adjustable Pressure screw34 which engages a plate 35 with a rubber pad 36 is connected.

Figures 5 to 7 show details of one of the four RoIlenlng.i-ri; Lnhoi.ton for the counter-pressure ring 18. Each roller 21 is in iilrier Gubol 40 loosely stored, which at 41 on an ειη

1 0 9 8 5 Γ) / 1 1 BB _ ₆ _

BAD ORlGfNAL

the holder 42 attached to the ring 18 is articulated. One Screw 44 engages the base of the fork 40, un the position of the rollers in the radial direction of the shield to adjust.

Figures 8-10 show details of one of the four pawls 24. The pawl has an U-profile and is hinged at 50 to a holder 51 which is attached to the counter-pressure ring 18. The piston 53 of one of the punches is also attached to the holder 51.

The invention is of course not restricted to the structural details of the exemplary embodiment described above. For example, the tubular shield need not necessarily have a circular cross-section. He can, for example, also have a rectangular cross-section and be used to drill pedestrian underpasses, whose cross-sectional dimensions are about 2300 mm 2100 mn. The resilient sealing ring 16 can also be used in If necessary, can be omitted.

10 9 8 5 0/1165

Claims (1)

- 7 PATENT CLAIMS: ( 1.) Tunnel boring equipment, consisting of a tubular! Shield which is driven forward as the drilling progresses by means of punches which act between anchoring or counterpressure points on the shield and a tunnel lining, which is introduced in sections behind or in the rear part of the shield as the drilling progresses is, characterized in that the stamps (17) are mounted on a carriage (18 and 20) which can be moved along with the stamps on the plate (10), and that means (13, 14, 24) are provided through which the pressure from the stamps can be transferred to the sign in at least one position of the carriage 2. Tunnel boring equipment according to claim 1, characterized in that that the carriage and the shield have cooperating means (13, 14, 24) by which the pressure from the Stamping at two or more positions of the carriage along the sign can be transferred to the sign. 3. Tunnel boring equipment according to claim 1 or 2, characterized in that the carriage has two rings (i8, 20) concentric with the shield, means (21, 22) for attaching each ring movably along the shield, _i and several punches (i7) which are mounted so that they can move the rings (18, 20) towards and away from each other, the one ring (20) being able to engage the tunnel lining behind or in the rear Part of the shield is inserted, and the other ring (i8) has means (24) with which it engages the anchoring or counter-pressure points (i3, 14) on the shield. 10 9 8 5 0/1165 4. Tunnel boring equipment according to claim 3 »characterized in that that the means for attacking the anchoring or counter pressure points have several detachable latches (24) attached to the other ring (i8), 5. Tunnel boring equipment according to one of claims i to 4, characterized in that the anchoring or counter-pressure points Abutments (13, 14) include around the inner surface of the shield are arranged and point in the direction of the rear end of the shield. 1 0 9 8 5 0/1 1 6 5