Device for the construction of underground structures from monolithic extruded concrete

 

(57) Abstract:

The invention relates to underground construction, namely, devices for the construction of underground structures from monolithic extruded concrete, and can be used in the construction of tunnels and shafts. The technical result consists in increasing the quality of the constructed roof support structures made of cast-pressed concrete. Device for the construction of underground structures contains a shield with solid jacks, press the ring, press the casing, the outer surface of which is in the zone of movement of the press ring parallel to the longitudinal axis of the device. Hydraulic cylinders move the press casing in the longitudinal direction is fixed by one end to the shield, and the other - at a press mold. The outer surface of the press casing is outside the zone of movement of the press ring, tapering at an acute angle to the longitudinal axis of the device, and then again parallel to the longitudinal axis of the device. Hydraulic cylinders move the press casing in the longitudinal direction is fixed on the tapering part of the press casing. 5 Il.

The invention relates to underground construction, namely, devices for the construction of underground. is S="ptx2">

A device for the construction of underground structures from monolithic extruded concrete containing shield with solid jacks, press ring, the sliding formwork, site, providing a seal press ring and means for feeding concrete into opalubochnoj space (U.S. patent N 4645378, CL 405-146 from 24.02.87 year).

The disadvantage of this design is the complexity of construction of the sealed knot, the presence of a large number of items of this node, which leads to low reliability, and hence the poor quality of constructed roof support structures made of cast-pressed concrete.

The closest technical solution to the proposed invention, the totality of symptoms is the device for the construction of underground structures from monolithic extruded concrete, described in a.c. USSR N 750084, CL E 21 B 9/06 from 23.07.80, containing a shield with flush jacks, press the ring, press the casing, the outer surface of which is in the zone of movement of the ring and outside parallel to the longitudinal axis of the device, and the hydraulic cylinders move the press casing in the longitudinal direction, one end of the fixed shield and the other to press the formwork.

eminii tunneling shield with simultaneous compaction of the concrete mix of the press ring is compacting concrete mix only in the axial direction, and no radial component of force pressing reduces the density of the concrete mix, as well as contact (introduction) into the surrounding soil, which ultimately reduces the quality of constructed underground structures from monolithic extruded concrete. In addition, improper use hydraulic cylinders move the press casing in the longitudinal direction, which do not participate in the process of pressing.

Task to be solved by the claimed invention is directed, is to improve the quality of constructed roof support structures made of cast-pressed concrete.

This objective is achieved in that the device for the construction of underground structures from monolithic extruded concrete containing shield with solid jacks, press the ring, press the casing, the outer surface of which is in the zone of movement of the press ring parallel to the longitudinal axis of the device, the hydraulic cylinders move the press casing in the longitudinal direction, one end of the fixed shield and the other to press the mold, the outer surface of the press casing is outside the zone of movement of the press ring, tapering at an acute angle to the longitudinal axis of the device, and then again vypolnim direction mounted on the tapering part of the press casing.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources, and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant is not detected similar, characterized by signs, identical to all material evidence of the claimed invention, and the definition from the list of identified unique prototype as the most similar set of features analogue has identified a set of essential towards perceived by the applicant to the technical result of the distinctive features in the claimed object set forth in the claims. Therefore, the claimed invention meets the criterion of "novelty" in the existing legislation. To verify compliance of the claimed invention to the requirement of inventive step, the applicant conducted an additional search of the known solutions in order to identify characteristics that match the distinctive features of the prototype of the characteristics of the claimed invention, the results of which show that the claimed invention is not necessary for the expert in the obvious way from the prior art.

In Fig. 1 shows a pre erection of underground structures from monolithic extruded concrete.

The device includes a shield with 1 flush 2 jacks, press ring 3, press the casing 4. Between the shield 1 and the press casing 4 are hydraulic cylinders 5 move the press casing 4 in the longitudinal direction. For excavation shield equipped working body 6, for submission to opalubochnoj space of the concrete mix is designed nozzle 7. The outer surface of the press casing in the zone 8, the movement of the press ring 3 parallel to the longitudinal axis 9 of the device and outside taper on the section 10 at an acute angle to the longitudinal axis, and then again parallel to the longitudinal axis of the device. The cylinders 5 move the press casing 4 in the longitudinal direction is fixed on the tapering portion 10.

The device operates as follows. In opalubochnoj space bounded by the press ring 3, shield 1, through the pipe 7 is fed concrete mixture, after which the pipe is locked (Fig. 2). Then begins the compaction of the concrete mix of the press ring 3 with shield 2 jacks and cylinders 5 move the casing 4 through a tapering section 10, providing an axial pressing force. However through the use of tapered portion 10 of the casing arise radial components of efforts negausim soil. After moving the shield 1 under the action of the effort of pressing the press ring 3 hydraulic jacks 2 and press the casing 4 by the hydraulic cylinders 5 are returned to the original position, developing a soil working body, the cycle repeats.

This design improves the quality of constructed roof support structures made of cast-pressed concrete.

Device for the construction of underground structures from monolithic extruded concrete containing shield with flush jacks, press the ring, press the casing, the outer surface of which is in the zone of movement of the press ring parallel to the longitudinal axis of the device, and the hydraulic cylinders move the press casing in the longitudinal direction, is fixed by one end to the shield, and the other to press the casing, wherein the outer surface of the press casing is outside the zone of movement of the press ring is tapered at an acute angle to the longitudinal axis of the device, and then again made parallel to the longitudinal axis of the device, thus hydrochlide movement of the press casing in the longitudinal direction is fixed on the tapering part of the press casing.

 

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