Tunnel shield

 

(57) Abstract:

The invention relates to the field of underground construction, namely, the tunneling shields with a rotary tool, and can be used in the construction of tunnels with different kinds of soil including hard rock, and also with the inclusion of boulders, limestone, etc. object of the invention is to improve the efficiency and reliability of device operation. Tunnel shield includes a housing, panel jacks, rotary working tool for excavation, crushing mechanism of soil, representing made in the working body of the conical cavity extending from the head part of the shield. In the cavity is stationary shaft eccentrically relative to the axis of the rotary tool and with channels for water supply and discharge channel. In the rotary working the body from the side of the conical cavity made additional annular cavity coaxial with the main conical cavity and connected with it the annular gap between the fixed shaft and the inner surface of the rotor of the working body, the value of the eccentricity is made ensuring minimal mentioned the gap is less than the Vienna conical cavity in the zone of minimum clearance. 4 Il.

The invention relates to the field of underground construction, namely, the tunneling shields with a rotary tool, and can be used in the construction of tunnels for various purposes in areas with different kinds of soil including hard rock, and also with the inclusion of boulders, limestone, etc.

Known tunneling shield, comprising a housing, panel jacks, rotary working tool for excavation and removal of soil outside of the shield (patent UK 2236340 on CL MCI E 21 D 9/06 from 03.04.91).

The disadvantage of this device is the relatively low reliability of its performance when drilling in soils containing large solids in the form of boulders, stones, because there is no mechanism for crushing. The lack of ability of a rotary working body to produce fragmentation of these species leads to a forced stop of the shield, and sometimes to failure.

The closest technical solution of the present invention, the set of essential characteristics is a tunneling shield, described in the patent Germany 3911378 C2 in class. E 21 D 9/06 from 01.06.94, comprising a housing, panel jacks, rotary working tool for the development of gr is rauscous from the side of the head part of the shield, when this cavity is stationary shaft eccentrically relative to the axis of the working body, with channels of water supply and discharge channel.

The disadvantage of this device is its relatively low efficiency and reliability of the excavation in soils with solids because there is a danger of clogging of the discharge channel is not enough fragmented pieces of found stones, boulders, etc.

Task to be solved by the claimed invention is directed, is to improve the efficiency and reliability of the tunneling shield with sinking in the ground, comprising as separate elements in solids and solid areas of solid rock.

The problem is solved due to the fact that in the tunneling shield, comprising a housing, panel jacks, rotary working tool for excavation and crushing mechanism of soil, representing made in the working body of the conical cavity extending from the head part of the shield, while in the cavity is stationary shaft eccentrically relative to the axis of the rotary tool and with channels for water supply and discharge channel, by tapering conical cavity and connected with it the annular gap between the fixed shaft and the inner surface of the rotary working body, thus the value of the eccentricity is made ensuring minimal mentioned the gap is less than the particle size required for transportation downstream channel, which is located outside the main conical cavity in the zone of minimum clearance.

Conducted by the applicant's analysis of the prior art, including the search for patents and scientific and technical information sources, has allowed to establish that the applicant is not detected similar, characterized by signs, identical to all the essential features of the claimed invention, and the definition from the list of identified unique prototype allowed us to identify 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.

In Fig.1 presents a General view of the tunneling shield.

In Fig.2 is a view of the tunnel shield on the front.

In Fig.3 - callout a in Fig.1.

In Fig.4 - section b-B in Fig.3.

Tunnel shield includes a housing 1, panel 2 jacks, rotary working time 6. The mechanism of fragmentation of the ground made in the form of a conical cavity 7 extending from the head part of the shield in the cavity is fixed to the shaft 8 with the eccentricity "e" relative to the rotary axis of the working body. In the shaft 8 has inlet channels 9 for water and the discharge channel 10. By tapering of the conical cavity 7 in the rotary working body made additional annular cavity 11, coaxially with the main conical cavity and connected with it the annular gap between the fixed shaft 8 and the inner surface of the rotor of the working body 3. The inner surface of the conical cavity of the rotor of the working body has inserts 12, as well as the outer surface of the fixed shaft 8 - carbide inserts 13. The magnitude of the eccentricity "e" is made ensuring minimal mentioned the gap "a" is less than the particle size required for transportation downstream channel 10, which is located outside the main conical cavity 7 in the zone of minimum clearance.

The device operates as follows.

In the construction of tunnels in soft soils when moving the tunneling shield ground, destroyed rotary working body is the outside of the shield together with the water.

In the case of penetration in soils containing large solids, the initial destruction is made by the cutters 4 rotary working body 3, then destroyed the soil falls into the conical cavity 7, which during the rotation of the rotor 3 relative to the eccentric set the fixed shaft 8 by using carbide inserts 12 and 13 is split into smaller factions. If in cone crushing cavity is not sufficient, relatively large pieces come in the additional cavity 11, which is the final guaranteed chopping up factions, allowing them to flow into the discharge channel for the removal of ground outside the tunnel shield.

This design of tunnel shield can increase the reliability and efficiency by eliminating driving the tailrace at penetration in soils containing large solids.

Tunnel shield, comprising a housing, panel jacks, rotary working tool for excavation and crushing mechanism of soil, representing made in the working body of the conical cavity extending from the head part of the shield, while in the cavity is stationary shaft eccentrically otno from the side of the conical cavity in the rotary working body made additional annular cavity, coaxially with the main conical cavity and connected with it the annular gap between the fixed shaft and the inner surface of the rotor of the working body, the value of the eccentricity is made ensuring minimal mentioned the gap is less than the particle size required for transportation downstream channel, which is located outside the main conical cavity in the zone of minimum clearance.

 

Same patents:

Tunnel shield // 2178081
The invention relates to underground construction, namely the tunneling shields, and can be used in the construction of tunnels for various purposes in areas with different types of soil (solid, sandy and t

The invention relates to underground construction and can be used in the construction of tunnels and shafts

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 invention relates to underground construction, and in particular to methods and devices for the construction of underground structures from monolithic extruded concrete, and can be used in the construction of tunnels for various purposes, and for the construction of vertical shafts

Tunnel shield // 2166088
The invention relates to underground construction

The invention relates to the field of mining and construction, namely, the method of pipeline construction in unstable and heterogeneous soils

The invention relates to the field of underground construction and can be used for the manufacture of tunnels and other underground structures

The invention relates to the construction of crossings of trunk pipelines under the highways and railway embankments in the soil of I - IV categories

Tunnel shield // 2150582
The invention relates to the field of underground construction, namely, the tunneling shields, and can be used in the construction of tunnels for various purposes in areas with different kinds of soil

The invention relates to underground construction and can be used for laying pipelines underground method, when conducting curved openings of small diameter

FIELD: mining industry.

SUBSTANCE: device has frontal, two side and two conical working tools with rock-destroying tools on outer surfaces, drives, rigidly connected to axes of each working tool, and displacement mechanism, connected to guides, placed at angle relatively to each other, which angle is determined from mathematical expression. Frontal and each of side working tools are made in form of two rotation bodies, having arced forming lines with given value of convexity. Axes of frontal working tool and axes of two conical working tools are rigidly connected to guides, axes of upper rotation body of frontal working tool being displaced relatively to axis of its lower rotation body towards pit-face, and axes of each pair of side working tools are jointly connected to each other and to guides. Frontal working tool may be made in form of several modules.

EFFECT: higher efficiency.

2 cl, 4 dwg

Tunneling method // 2259479

FIELD: underground structure building, particularly for forming underground tunnels and collectors.

SUBSTANCE: method involves excavating ground with cutting tool; regulating kentledge pressure in rotor chamber and backfilling annular tubing space. Kentledge pressure is automatically adjusting with that of enclosing ground exerting pressure on shield case by means of membranes. The membranes are installed in shield case and are permanently subjected to actual enclosing ground pressure. Backfilling operation is performed through end part of shield case immediately after shield case movement.

EFFECT: prevention of ground and object deformation in tunnel boring machine movement area, increased backfill layer elasticity and tunnel lining impermeability.

4 cl, 6 dwg

FIELD: tunnel construction, particularly devices to construct hydroelectric power plant floodgates and to build motor roads and rail roads in mountains.

SUBSTANCE: method involves creating conditions favorable for chemical reaction between chemical element oxides basically constituting rock and graphite for rock fusion. For this rock is heated up to high temperature at face by thermal electric arc energy transmission through metal front tunneling machine wall. Electric arc is generated between electrodes inside discharge chambers arranged on inner surface of front tunneling machine wall. Electric current is supplied to electrodes via graphite mass moving through electrically-insulated pipes. Graphite is forced via electrodes and introduced into face through nozzles connected to front tunneling machine wall.

EFFECT: possibility to regulate electric current power and graphite mass to select necessary excavation regimes.

FIELD: mining.

SUBSTANCE: method of boring hard rock by means of tunnel boring machine equipped with disks of hardened steel projecting from cutting head consists in supply of foamed water liquid to cutting head; this composition corresponds to surface active substance -SAS and lubricating material - polyethylene oxide with molecular wt from 4.500.000 to 8.000.000. The said ingredients are measured separately in a water form, are added into water and are transformed into a foam using anionic or nonionic SAS; the said composition is obtained by dilution of concentrate with water on site.

EFFECT: reduced wear of cutting components; increased boring efficiency.

4 cl

FIELD: mining.

SUBSTANCE: invention is related to mining, in particular to mechanised performance of underground mine tunnels with round shape of cross section. Method for performance of underground mine tunnel of round cross section includes formation of oriented cavity in the Earth bowels, cutting of helical and longitudinal radial channels in edge zone of tunnel in surrounding rock mass, loading and transportation of broken muck, maintenance of stripped area by erection of support and organization of ventilation. Together with cavity formation they cut three longitudinal radial channels, evenly distributing them in plane of tunnel cross section. At the same time one of longitudinal radial channels is oriented along line of most probable largest action of external load from forces of rock pressure. Damaged rock is removed from longitudinal radial channels and loaded in transport vehicle. In longitudinal radial channels they install embedded elements, to which support elements are connected. Besides depth of longitudinal radial channel makes at least half of radius of cross section of produced tunnel.

EFFECT: higher reliability of mine tunnel maintenance in operational period.

3 dwg

FIELD: mining.

SUBSTANCE: invention is related to mining industry, in particular to shield driving of tunnels, and may be used in shield driving of through collector tunnels with concrete lining. Method for shield driving of tunnel consists in erection of shield chambers by method of "slurry-type wall" for assembly and turns of shield on track of arranged tunnel. Walls of shield chambers, at least those, where holes are provided for passage of shield, are made of concrete, having compression strength of not more than 11.5-14.5 MPa, are reinforced with glass-plastic reinforcement from rods with diametre from 4 to 10 mm with ultimate strength in case of cutting across fibres of at least 165 MPa and developed by working element of shield. Formation of concrete lining, in process of collector tunnel driving, at least in joint of shield chambers walls and on length of tunnel from two to ten of its diametres, is carried out by at least two concentric layers, between which additional internal hydraulic insulation layer is arranged, and application of hydraulic insulation coating onto inner surface of concrete lining is carried out after complete drying of surface layer of tunnel walls.

EFFECT: improved reliability of tunnel arrangement and its hydraulic insulation, higher speed of underground communications construction.

2 cl

FIELD: mining.

SUBSTANCE: birotating tunnel shield unit consists of three sections. Two front sections, starting from bottomhole, are mounted on diaphragm by means of ball runnings with toothed collars of conical gear, engaged at diametral opposite sides with master conical gears of section rotation drives arranged on diaphragm, which is mounted at front end of beam with drive by means of Hooke joint and hydraulic cylinders with stems, fixed on beam and diaphragm by means of journals. Beam with drive is mounted in guides of back section, at the same time auger with a separate drive is mounted inside beam. On external surface of back section there are elements of conrotation arranged in the form of plates aligned along longitudinal axis of section, at the same time on external surfaces of front rotary sections there are helical blades arranged with opposite direction of winding. Besides, small actuating elements with individual drives and sleeves with augers are mounted upstream each blade and element of conrotation. Hollow beam is mounted in the centre of diaphragm, inside which there is an auger with drive fixed, at the same time outside - at bottomhole of beam there is a socket and loading rotor with drive mounted, connected to the main actuating element.

EFFECT: unloading of back section from torque and from longitudinal braking force.

6 dwg

FIELD: mining.

SUBSTANCE: tunnelling header unit comprises serially arranged head and tail sections. The head section comprises a helical blade on the external surface, an actuator and an auger mechanism for broken mass discharge, besides, a rotation mechanism is also located in the head section. The tail section comprises longitudinal support elements, aligned along the longitudinal axis of the unit, a drive of the rotation mechanism. The sections are connected to each other with the possibility of the head section rotation relatively to its longitudinal axis. The rotation mechanism is arranged in the form of a hollow shaft, where two wave generators are installed, being arranged with eccentricity relative to the axis of the driving shaft, a geared crown arranged on the inner surface of the head section, a separator connected to the end section and intermediate solids of revolution. Number of teeth in the geared crown is more than the number of intermediate solids of revolution by one. The sections have a rigid kinematic link in the axial direction, which consists of two touching circular ledges, one ledge is located on the separator, the second ledge is arranged on the inner surface of the head section. The driving shaft is installed in rolling bearings, with one bearing installed in the head section, and the other one - in the end section. The driving shaft at the side of the stripped area has a driving gear arranged with the possibility of rotation from motors via a motor gear, and the motors are fixed at the inner surface of the end section.

EFFECT: improved reliability of the unit operation, loading capacity of the unit drive and efficiency of tunnelling, expanded area of the unit application.

5 dwg

FIELD: mining.

SUBSTANCE: tunnelling combine (90) for horizontal mines comprises a rotary cutting head (93), where there are many cutting assemblies (10) installed as capable of rotation. Multiple units of instruments (50) are connected with a rotary cutting head, at the same time each unit of instruments comprises a distal end in contact with the appropriate cutting assembly. Units of instruments comprise multiple sensors, including an accelerometer (32), a magnetometer (33) and a temperature sensor (34) to monitor the appropriate cutting assembly. Sensors are installed at the remote end of units of instruments pressed for contact with a cutting assembly. Units of instruments comprise a wireless transceiver and are connected to each other into a circuit of data transfer or a peer-to-peer network. A source (176) of power supply, such as a battery pack, is provided for each unit of instruments. Sensor data may be used to control operation of a tunnelling combine for horizontal mines and/or for monitoring condition of cutting assemblies.

EFFECT: enhancing effectiveness and reliability of tunnelling operation.

27 cl, 7 dwg

Duplex geovehicle // 2469192

FIELD: mining.

SUBSTANCE: duplex geovehicle consists of three sections. Two front sections are mounted on load-carrying beams with drives by means of ball races with toothed rims of bevel gear. Section rotation drives are located on diaphragms that are mounted on front ends of load-carrying beams with drives. Each load-carrying beam with a drive is mounted in the guides of rear section with possibility of its retraction. A screw with a separate drive is mounted inside the load-carrying beam. On external surfaces of front rotating sections there located are screw blades with opposite winding direction. Before each blade there mounted are small actuating elements with individual drives and sleeves with screws. In the centre of diaphragms there mounted are hollow beams inside which screws with drives are mounted Flared ends and loading rotors with drives are mounted on the front side of face ends of hollow beams. Drives and actuating elements of rear section are located on its front wall. Outside the front wall: at the top and at the bottom - horizontally, and in the centre - vertically. Drag conveyor, tray and screw with a drive are located behind the front wall inside rear section.

EFFECT: increasing the strength of out-contour layer of rock mass.

5 dwg

Up!