Method for constructing a tunnel and device for realization of said method

FIELD: mining industry.

SUBSTANCE: method includes expanding guiding pipeline by extracting soil from around it by driving shield with rotor working implement. Soil is extracted to value, surpassing needed outer diameter of shield cover. Forming ring-shaped space inside tunnel mine is compacted from back side and continuously filled with liquid. Concurrently sedimentation of extracted soil is drained from lower portion of face. Displacement of driving equipment relatively to guiding pipeline is performed along soft trajectory. Device has means for driving guiding pipeline and driving shield with rotor working implement. Rotor working implement is mounted on body of driving shield. Front surface of working implement with cutters extends beyond outer contour of shield cover, provided with back end compaction. Device is provided with fluid pump device. Force hose of pump is outputted from upward portion beyond outer contour of shield cover. Device for transporting extracted soil from face is made in form of suck-in hose connected to pump device and to lower portion of ring space beyond rotor working implement.

EFFECT: lower transverse loads on guiding pipeline.

2 cl, 1 dwg

 

Group of inventions relates to mining and construction and can be used, for example, in the construction of tunnels for various purposes and in a variety of geological conditions, as well as the manufacture of sinking aggregates for the construction of such tunnels.

One of the many methods of tunnel construction method is to pre-strip microtones or advanced well along the specified line of the tunnel and subsequent expansion obtained develop to the size of the main tunnel is used mainly in tunnels under the road and rail routes, as well as in the construction of shallow tunnels in dense urban areas, requiring strict compliance with the accuracy of the route of the tunnel and clean environment with the exception of the surface of the ground subsidence in the area of construction.

There is a method of construction of the tunnel and device for its implementation, with almost no deformation of the soil mass on the construction of a tunnel through the development of the soil during the expansion of advanced wells with a working body of the selective action only down from well under a permanent roof of the tunnel and boreholes (see, for example, patent RF № 2209978, MCL.7E 21 D 9/00, published. 2003).

For weeks the action specified group of technical solutions can be attributed to the limited scope due to the non-traditional cross-sectional construction of the tunnel, namely close to triangular.

There is also known a method of construction of the tunnel, including the laying of the guide pipe with the casing sleeve in the direction opposite to the strip direction of the main tunnel, the subsequent expansion of the pipeline by excavation around the casing liner using a rotary tool and protected by a cylindrical shield shell, the shipment of the developed ground by means of a screw conveyor for guiding the pipeline in the direction of tunneling, the promotion of the shield shell and the working body relative to the sleeve and squeezing the last of the guide pipe simultaneously with the forward movement of the shield shell with a working body under the influence of effort applied to the core from jacking installation, with the development of the soil around the casing sleeve carry out to the value in the radial direction, not exceeding the inner diameter of the shield shell and the advancement of the shield shell with a working body along the tunnel are carried out by the hard path, due to the constant hard contact of the shield shell and the working body with the casing sleeve guide pipe under the influence of gravity shield with a working body, as well as unevenly distributed pressure consisting of a control room envelope from okrujayushego (see, for example, USSR author's certificate No. 291065, MCL.3E 21 D 9/00, published. 1971). This method is the closest analogue of the claimed method.

To implement this method is used the unit for tunnel construction, comprising a device for laying the guide pipe with the casing liner and the rock-body tunneling shield with a cylindrical shell and a focus for interaction with the tail part of the casing liner pipe, the annular rotary screed mounted on the casing sleeve guide pipe and having on the frontal surface of the teeth, not protruding in the radial direction beyond the inner contour of the cylindrical shield shell, jacking unit for engagement with the rear face of the shield shell and the device for shipment from the bottom of the developed soil, made in the form of a screw conveyor inside the guide pipe and associated with rock the body (see the last of the above sources of information). This unit is the closest analogue of the claimed device.

The main disadvantage of the last of the above method and device for its implementation is that during the development of the soil around the casing liner guide pipe with the simultaneous shipped through the pipeline by means of a screw conveyor and moving the shield with a working body along the sleeves on the hard path is not precluded by the gravity shield and uneven mountain pressure in the radial direction on the guide pipe, which will inevitably lead to subsidence of the ground above the tunnel, the deflections of the pipe and, consequently, to the distortion of the trajectory of penetration, limiting the possibility of such sinking in relation to the length of the tunnel, and additional energy and labor costs. In addition, these technical solutions do not allow to combine the processes of the strip guide pipeline and other construction work on the construction of the tunnel, which affects the timing of construction.

The objective of the proposed group of inventions is a method of construction of the tunnel and device for its implementation, the use of which ensures the elimination of the above-noted disadvantages of the known technical solutions through the elimination of force in the radial direction in the casing sleeve guide pipe and excessive pressure on the array of ground beyond the external contour of the tunnel due to the installation of the tunneling shield with the annular working body in a floating position.

The problem is solved in that in the method of construction of the tunnel, including the laying of the guide pipe with the casing sleeve, an extension of the well pipe through the development of the soil around the casing liner using a rotary RA is Otsego body and under the protection of the shield shell, the shipment of the developed soil from the bottom, the promotion of the shield shell and the rotary working body along the casing liner guide tubing and extrusion casing liner of the pipe simultaneously with the advancement of the shield shell, the development of the soil around the casing liner guide pipeline to produce values in the radial direction greater than the outer diameter of the shield shell, condense on the sides of the rear shield shell forming a gap between it and the cylindrical surface of the tunnel to develop and continuously filled with liquid annular space bounded by the frontal surface of the rotary working body, the surface of the tunnel workings, the outer cylindrical surface of the shield shell and the outer cylindrical surface of the casing sleeve, while the shipment was developed soil from slaughter takes place simultaneously with the filling liquid of the specified annular space by suction with a pump sludge generated in the lower part of the tunnel production, and promotion of the shield shell and the rotary working body along the casing liner guide pipeline carried out on the soft path. In the unit for tunnel construction, comprising a device for laying guide pipeline portora the destructive body and casing sleeve, tunneling shield with the shield shell and a stop for engagement with the tail part of the casing liner pipe, the rotary body work on the frontal surface of which is fixed cutters and the body of which is mounted for rotation and longitudinal movement relative to the guide sleeve piping, jacking unit for engagement with the rear end of the shield shell and the device for shipment of the developed soil from the bottom, the rotary body of the working body is mounted on the body of the shield, and its front surface with cutters acts in the radial direction beyond the outer contour of the shield shell, equipped with a rear face seal, while the unit is equipped with a liquid pumping unit to the discharge hose, summarized in the upper part of the annular space bounded by the outer surface of the rotary working body, the surface of the shield shell seal, the outer cylindrical surface of the casing sleeve guide pipe and the surface of the tunnel workings, and the device is designed for shipment of soil from the slaughter is made in the form of a suction hose connected to the pump unit and the lower part of the specified annular space.

The essence of the proposed group of inventions, as well as the above-noted and other properties of the advantages of the invention will become more clear and evident from the following examples, with reference to the graphical illustration.

The drawing schematically and in longitudinal section shows an aggregate for the construction of the tunnel after the introduction of the tunneling machine with rotary working body in the ground and placing them in a floating position.

The construction of the tunnel begin with excerpts and arrangement of the launching pit 1, which is placed jacking installation 2 power cylinders 3.

From the launching pit 1 along the constructed tunnel pave the guide pipe by drilling ahead wells 4 through the rock body 5 and the introduction into it of the start of the pit in the direction of penetration of the casing sleeve 6, to align the rear end of the latter with the front wall of the pit 1 or leaving the rear end of the casing sleeve 6 speakers.

Then in the starting pit 1 coaxially with the guide pipe install tunneling shield with concentric spaced relation to each other, a cylindrical shield shell 7 with emphasis 8 for engagement with the rear part of the casing sleeve 6, and an annular rotary body work 9.

The rotary body of the working body 9 is mounted inside the tunnel of the shield by means of the rolling bearing 10 with the possibility of rotation (drive not shown) and longitudinal movement relative to the casing sleeve 6 and the shield shell 7. Jesd the linkage shield shell 7 with a rotary working body 9 in the radial direction necessary for their joint hanging in a floating position. To enable changing the value and effort of filing a rotary working body 9 regardless of the longitudinal displacement of the shield shell 7 are connected through a spline connection 11.

On the frontal surface of the rotary working body 9 fixedly mounted cutters 12. This frontal surface with the cutters 12 acts in the radial direction beyond the outer contour of the shield shell 7 by approximately 30 mm for the formation of a gap between the outer cylindrical surface of the shield shell 7 and the surface of the tunnel excavation. The tail portion of the shield shell 7 has an external, mechanical o-ring seal 13 is mounted with the possibility of accommodation in the mentioned gap.

On the earth's surface in the area of the launching pit 1 posted by liquid pump unit 14 to the discharge hose 15 output for the outer contour of the shield shell 7 in its upper part, and the suction hose 16, placed in the lower part of the annular space between the shield shell 7 and the rotary working body 9 near the breast slaughter. The discharge hose 15 from the pump unit 14 serves as a means for continuous filling of fresh working fluid of a closed annular space between the structural elements of the unit and the surface of the elaboration of the tunnel. As the working fluid can be applied clay thixotropic solution.

Suction hose 16 in conjunction with the pump unit 14 serves as a device designed for shipment of soil from the bottom.

After installing the tunneling shield coaxially with the bore 4 of the guide pipe includes a rotary working body 9 and begin the process of its implementation in the ground and extending bore 4 through the development of the soil around the casing liner and the implementation of the feed rotor of the working body or using stand-alone drive source (not shown), or by using jacking installation 2, the cylinders 3 which when nominating their rods rest against the rear end of the shield shell 7 through the pressure ring 17.

The implementation process in a ground shield shell 7 after rotary working body 9 is carried out until the overlap side of the pit 1 gap 18 seal 13 and the contact of the stop 8 of the shield shell 7 with the rear part of the casing sleeve 6 of the guiding pipe. In this position of the unit begin continuous filling through the discharge hose 15 pump unit 14 working fluid annular space, which is limited to the frontal surface with blades 12 of the rotor of the working body, the surface of the tunnel workings, the outer cylindrical surface of the shield shell 7 with the seal 13 and the outer cylindrical surface of the casing sleeve 6 towards the shining of the pipeline. Specified the annular space is filled with liquid continuously to complete the excavation of the tunnel.

The result of this action creates conditions for the emergence of the lifting force, and tunneling shield with annular rotary working body 9 is installed in a tunnel development in a floating position relative to the casing sleeve 6 guide pipeline.

After that carry out the main construction of the tunnel. The pressure ring 17 with the help of hydraulic cylinders 3 divert ago and in the vacant space in the starting pit 1 serves section 19 of the tunnel lining, sostakovic this section with the rear face of the shield shell 7 and when podpisanii side of the pressure ring 17 continue the process of expanding the bore 4 of the guide pipe with simultaneous extrusion from the well casing liner 6 and the sinking of advanced wells.

Taken in the development of soil shavings mixed with the working fluid and settles in the lower part of the above-mentioned restricted annular space. Accumulated sediment together with a part of the working fluid come out of the bottom by means of transportation on the suction hose 16 pump unit 14 outside the construction site. Partial drainage of fluid from the specified annular space is compensated in the process h is discontinuous filling him up with fresh fluid, thereby maintaining the floating position of the shield with a working body.

The amount of working fluid supplied through the discharge hose 15, depends on the speed of excavation in the pit, the speed of transportation developed a ground-based mining and geological conditions of the construction of the tunnel.

Thus, the promotion of the tunneling machine with rotary working body 9 along the tunnel carried out in suspended (floating) state, ensure smooth movement trajectory, with almost no force on the casing sleeve 6, which acts as a guide element in the area of the tunneling shield with a working body and the function of the mounting walls of the early wells in the area of the strip guide pipeline.

In addition to the primary function of posting the tunneling shield with a working body in the floating position, the working fluid used in constant surface generation, preventing it from collapsing and therefore virtually eliminating deformation and subsidence array of above ground was constructed as a tunnel.

Unloading casing sleeve 6 from the radial pressure also allows you to maintain the accuracy of sinking unit on a given route of the tunnel and increase the shoulder pads guide pipe before item is koceski shield without limiting the total length of the constructed tunnel.

Formed over the tunnel lining gap fill backfill (for example, Benicasim) solution, which also supports the surface of the tunnel generation and reduces the force pushing the whole structure along the route of the tunnel.

The process of tunnel construction carried out by the benches on the amount of extension of the rods of the power cylinders 3 until the conclusion of the tunnel unit in the receiving pit (not shown), where it is removed.

As follows from the above, the use of all signs proposed technical solutions listed in the claims, a new and unexpected for experts in the field of technical effect consists in the construction of the tunnel through the tunneling equipment installed in a floating position relative to the guide pipe, which cannot be obtained from the use of any of these signs separately. For example, the shield shell in this case is not an element mounting surface of the tunnel workings, and serves in part to create the conditions for the exclusion of transverse impact on the guide pipe.

The positive effect of using the above-described group of inventions in comparison with the known analogues is to expand the field of PR is the changes in the technology and equipment of this type, the lower energy process and improve the accuracy of sinking unit on the specified line of the tunnel due to the exclusion of force in the transverse direction on the guide pipe to the excavating equipment, the reduction of the duration of the process by providing the possibility of combining processes strip guide pipe and the main tunnel, as well as in the practical exclusion of ground subsidence on the construction of a tunnel through hydraulic podporu surface tunnel production during the whole process of conducting tunneling works. In addition, the invention provides a process in terms deserted the working space under the ground.

1. The method of construction of the tunnel, including the laying of the guide pipe with the casing sleeve, an extension of the well pipe through the development of the soil around the casing liner using a rotary tool and under the protection of the shield shell, the shipment of the developed soil from the bottom, the promotion of the shield shell and the rotary working body along the casing liner tubing and extrusion casing sleeve of the guide pipe simultaneously with the advancement of the shield shell, wherein the development of the soil around the casing liner nab allaudio pipeline to produce value, in the radial direction greater than the outer diameter of the shield shell, condense on the sides of the rear shield shell forming a gap between it and the cylindrical surface of the tunnel to develop and continuously filled with liquid annular space bounded by the frontal surface of the rotary working body, the surface of the tunnel workings, the outer cylindrical surface of the shield shell and the outer cylindrical surface of the casing sleeve, with the shipment of the developed soil from slaughter takes place simultaneously with the filling liquid of the specified annular space by suction with a pump sludge generated in the lower part of the tunnel production, and promotion of the shield shell and the rotary working body along the casing liner guide pipeline carry out soft path.

2. Unit for tunnel construction, comprising a device for laying the guide pipe with the rock cutting body and the casing sleeve, tunneling shield with the shield shell and a stop for engagement with the tail part of the casing liner pipe, the rotary body work on the frontal surface of which is fixed cutters and the body of which is mounted for rotation and longitudinal movement relative to the sleeve, dombra the ing the installation to communicate with the rear end of the shield shell and the device for shipment of the developed soil from the bottom, characterized in that the rotary body of the working body is mounted on the body of the shield, and its front surface with cutters acts in the radial direction beyond the outer contour of the shield shell, equipped with a rear end-face seal while the unit is equipped with a liquid pumping unit to the discharge hose connected to the upper part of the annular space bounded by the outer surface of the rotary working body, the surface of the shield shell seal, the outer cylindrical surface of the casing sleeve guide pipe and the surface of the tunnel workings, and the device for shipment of soil from the slaughter is made in the form of a suction hose connected to the pump unit and the lower part of the specified ring space.



 

Same patents:

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SUBSTANCE: method includes expanding guiding pipeline by extracting soil from around it by driving shield with rotor working implement. Soil is extracted to value, surpassing needed outer diameter of shield cover. Forming ring-shaped space inside tunnel mine is compacted from back side and continuously filled with liquid. Concurrently sedimentation of extracted soil is drained from lower portion of face. Displacement of driving equipment relatively to guiding pipeline is performed along soft trajectory. Device has means for driving guiding pipeline and driving shield with rotor working implement. Rotor working implement is mounted on body of driving shield. Front surface of working implement with cutters extends beyond outer contour of shield cover, provided with back end compaction. Device is provided with fluid pump device. Force hose of pump is outputted from upward portion beyond outer contour of shield cover. Device for transporting extracted soil from face is made in form of suck-in hose connected to pump device and to lower portion of ring space beyond rotor working implement.

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2 cl, 1 dwg

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