RU2184238C1 - Facility for erection of underground structure from poured- in-place pressed concrete - Google Patents

Abstract

FIELD: underground construction, construction of various tunnels. SUBSTANCE: facility includes tunnel shield with mechanism for processing of ground, shield hydraulic jacks, moulding forms with hydraulic jacks for their displacement, moulding ring and branch pipe to feed concrete mixture. Facility is fitted with expanding mechanism located on side of tail part of moulding forms and movably joined to forms. It is manufactured in the form of semi-rings interlinked by means of hydraulic jacks. One semi-ring is equipped with columns, free end of each column has carrying roller mounted for interaction with internal surface of poured-in-place pressed lines of underground structure. EFFECT: increased efficiency and productivity of operation of facility in soft, quick grounds. 3 dwg

Description

 The invention relates to the field of underground construction, and in particular to devices for the construction of an underground structure of cast-pressed concrete, and can be used in the construction of tunnels for various purposes.

 A device for the construction of an underground structure containing a tunneling shield, a thrust wall, power hydraulic jacks, a pressure beam and a supporting device (RF patent 2057941 according to class E 21 D 9/06 from 1996).

 The disadvantage of this device is the inability to use it for the construction of an underground structure of cast-pressed concrete.

 The closest technical solution for the combination of essential features is a device for erecting an underground structure made of cast-pressed concrete, containing a tunneling shield with a soil development mechanism and hydraulic shield jacks, a press formwork with hydraulic jacks for moving it, a press ring and a pipe for supplying concrete mixture (a (c. USSR 750084 according to class E 21 D 9/06 of 07/23/1980).

 The reasons that impede the achievement of the required technical result is the relatively low efficiency of its operation in the conditions when there are areas with either a low soil density (quicksand, dusty rocks, etc.) or areas with voids in front of the tunneling shield, which makes it difficult to create the necessary the pressing force of the concrete mixture due to the lack of resistance to the movement of the tunneling shield, as well as at the final stage of penetration - when the shield enters the barrel.

 The problem to which the claimed invention is directed, is to increase the efficiency and productivity of the device in weak, quick floating soils.

 The problem is solved due to the fact that the device for erecting an underground structure made of cast-pressed concrete, containing a tunneling shield equipped with a soil development mechanism and shield hydraulic jacks, a press formwork with hydraulic jacks for moving it, a press ring and a pipe for supplying concrete mixture, is equipped a spacer mechanism located on the side of the tail part of the press formwork, movably connected to the tail part of the press formwork, made in the form of half rings, interconnected hydraulic jacks , Wherein one of the half-rings is provided with racks, at the free end of each of which is mounted the support roller, with its interaction with the inner surface of the cast-molded lining an underground structure.

 The analysis of the prior art by the applicant, including a search by patent and scientific and technical sources, allowed to establish that the applicant has not found an analogue characterized by features identical to all the essential features of the claimed invention set forth in the claims.

 Figure 1 shows a General view of the device for the construction of an underground structure of cast-pressed concrete; in FIG. 2 - section AA in figure 1 (the rods of the hydraulic jacks of the spacer mechanism are completely removed in the housing); in FIG. 3 - section AA in figure 1 (the rods of the hydraulic jacks of the spacer mechanism are extended from the housing).

 A device for erecting an underground structure made of cast-pressed concrete comprises a tunnel shield body 1 with a rotary excavation mechanism 2, shield hydraulic jacks 3, a press ring 4, a press formwork 5 with hydraulic jacks for moving it 6, a pipe 7 for supplying concrete mix into the space between the shield body 1 and the formwork 5. Behind the tail of the formwork 5 is a spacer mechanism 8, movably connected by means of rods 9 with the formwork 5.

 The spacer mechanism is made in the form of half rings 10 and 11, interconnected by hydraulic jacks 12, while one of the half rings (upper half ring 10) is equipped with struts 13, on the free end of each of which a support roller 14 is fixed with the possibility of its interaction with the inner surface of a molded pressed lining 15.

 The device operates as follows.

 After the concrete mixture is fed through the pipe 7 into the after-deck space, the shield tunnel is moved forward by means of hydraulic shield jacks 3 while the concrete mixture is pressed by the press ring 4.

 In the case when the presence of soil in front of the shield or its structure provides the required force directed in the direction opposite to the movement of the shield, the concrete mixture is compacted with the required pressing pressure, the press formwork 5 is moved by means of hydraulic jacks 6 and, accordingly, the spacer mechanism 8 on the rollers 14. In this case, the half rings 10 and 11 of the spacer mechanism occupy the position shown in FIG. 2.

 In the case when the nature of the soil or the presence of voids in front of the soil development mechanism after the next concrete supply cycle does not provide the required pressure on the concrete mixture, the hydraulic jack rods 12 extend and the half rings 10 and 11 occupy the position shown in Fig. 3, bursting into the inner surface -pressed lining of an underground structure. In this case, the movement of the press formwork does not occur, and the hydraulic jack jacks 6 extend, squeezing the hydraulic fluid out of the rod cavity, creating a force sufficient to ensure the concrete mixture is pressed.

 Thus, the presence of a controlled spacer mechanism allows the shield to be moved and the concrete mixture to be pressed, regardless of what density the soil is in front of the shield, and also in the case of voids in front of the tunnel shield, which increases the efficiency and productivity of the device and, ultimately, increases quality of the monolithic-pressed lining of the underground structure under construction.

Claims (1)

 A device for erecting an underground structure made of cast-pressed concrete, containing a tunneling shield equipped with a soil development mechanism and hydraulic shield jacks, a press formwork with hydraulic jacks for moving it, a press ring and a nozzle for supplying concrete mixture, characterized in that it is provided on the side the tail part of the press formwork with a spacer mechanism movably connected to the tail part of the press formwork made in the form of half rings interconnected by hydraulic jacks, while one of the floor the shot is equipped with uprights, on the free end of each of which a support roller is fixed with the possibility of its interaction with the inner surface of the cast-pressed lining of the underground structure.

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