Method for shield driving of tunnel

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

 

The invention relates to mining and underground construction, in particular to a shield tunneling, and can be used including during shield tunnelling through-collector tunnels with concrete lining.

One of the significant challenges facing the operational service urban sewer networks is the creation of new and the maintenance of the lining of existing engineering and drainage tunnels. Technology and complexity of building and those other tunnels, especially in water-saturated soils, as well as the durability of the tunnel lining largely depend on the quality of the material, waterproofing and accordingly the quantity of ground water penetrating into the tunnel.

Struggle with percolating groundwater can be achieved by improving the quality of the tunnel lining due to the use of expensive, but reliable materials, as it follows from the ed. St. USSR N 620524, CL E21D 9/00, 1978. The disadvantage of this method of construction is the high cost of the tunnel and the construction of tunnels of small extent.

In the construction of tunnels in saturated soils widespread way of shield tunneling, which consists in the destruction of the breed slaughter, the destruction destroyed rock forming the concrete lining of the tunnel and the last is the fact that waterproofing the inner surface of the tunnel lining. In this case, initially constructing and mounting the camera to build the shield. Because the tunnel lay for the most part straightforward, in place of changing the direction of the tunnel construct a rotary chamber, which produces a reversal of the shield (see, for example, Japan patent No. 7150899, 1995).

Construction in water-saturated soils shield cameras produce, as a rule, by the way "wall", in which the pit excavation and construction of concrete walls of the cells is under the protection of thixotropic solution. Under these conditions, when the camera thixotropic mortar enforcement and sealing the inlet and outlet openings sewer tunnel in the walls of the cells represents a significant challenge. This is because in the construction of the walls of the chambers of concrete structures necessary to break through the input and output openings in advance of the entrance or exit of the shield in the tunnel. To do these holes usually have to manually because the working body of the shield is not able to destroy a concrete wall. In that case, if the wall is being built without reinforcement, long-term maintenance of the camera is not possible (see, for example, U.S. patent No. 4052859, CL E21D 9/06).

The invention is directed to solving the problem of creating a method of shield tunneling, call the Commissioner, reliable, and lower cost to produce the construction of the tunnel and its waterproofing.

The technical result that can be obtained by using the method, is to increase the speed of construction of underground communications while increasing the reliability of the constructed tunnel.

The problem is solved due to the fact that the way of the shield tunneling engineering services consisting in the construction method "wall" panel cameras to build, rotation, and dismantling of the shield on the route of the underground tunnel and to activate the cell walls of shield jacks working shield, destroying the rock face shield working body, the removal of the destroyed rocks and the formation of the reinforced concrete tunnel lining, wall panel of the camera, at least those in which are openings for the passage of the shield, made of a concrete having a compressive strength of not more than 11,5-14,5 MPa. Reinforcement of concrete produce fiberglass reinforcement from rods with a diameter of 4-10 mm with tensile strength when cut across the grain of not less than 165 MPa. After hardening of the concrete and the Assembly of the shield produce the destruction of the cell walls shield the working body and lead the further development of the tunnel with its lining. Similar technology can be used in the construction of foundations and trenches using bonuscodes piles.

On the second version of the shield driving method applies to facilities the structure of the collector tunnel, but the problem to which the invention is directed, remains the same, namely the implementation of the method is to enable a reliable and cost to produce the construction of the tunnel and its waterproofing.

The problem is solved due to the fact that the way of the shield tunneling, consisting in the construction method "wall" panel cameras to build, rotation, and dismantling of the shield on the route of the underground tunnel and to activate the cell walls of shield jacks working shield, destroying the rock face shield working body, the removal of the destroyed rocks, forming the reinforced concrete tunnel lining and further waterproofing the inner surface of the tunnel lining by applying a waterproofing coating that wall panel of the camera, at least those in which are openings for the passage of the shield, made of a concrete having a strength compression is not more than 11,5-14,5 MPa. Reinforcement of concrete produce fiberglass reinforcement from rods with a diameter of 4-10 mm with tensile strength when cut across the grain of not less than 165 MPa. After hardening of the concrete and the Assembly of the shield produce the destruction of the cell walls shield the working body and lead the further development of the tunnel with its lining. While forming the concrete lining, at least at the junction of the tunnel with a wall panel of the camera and on the length of t is Nela from two to ten tunnel diameters produce, at least two concentric layers, between which place additional internal waterproofing layer, and applying a waterproofing coating on the inner surface of the concrete lining is produced after complete drying of the surface layer of the walls of the tunnel.

The method is as follows. The tunnel excavation is performed by means of the tunneling shield.

Originally invented Assembly consisting of a control room camera. The construction of the shield mounting cameras are a method of "wall". In this case, initially carry out the fastening of the top of the trench to keep the soil from landslides and direction of the working body of earthmoving equipment. Then, after cooking mud, make the filling this clay mortar space between the walls of the fastening top of the trench. The trench excavation to a depth equal to the depth of the underground walls, produced under the clay solution with constant replenishment of its volume as excavation. After installing rebar cages and implementation process of concreting undertake the development of a soil core within the shield chamber designed for the Assembly of the shield. Similarly form a receiving chamber for rotation of the shield on the route of the underground tunnel.

Wall panel cameras, at least t is, in which are the openings for the entrance and/or exit of the shield, made of a concrete having a compressive strength 11,5-14,5 MPa, and reinforced fiberglass reinforcement in the form of frames of rods with diameter from 4 mm to 10 mm with tensile strength when cut across the grain of not less than 165 MPa. This embodiment of the chamber walls allows them to develop a working body of the shield in the size of the tunnel walls. Under certain soil conditions, such as reinforcement can be performed around the perimeter of the camera that allows you to simplify the technology and reduce the cost of construction of the tunnel.

After Assembly of the shield submitting it to the bottom hole is made through the shield jacks, originally based on one of the walls of the chamber.

The output of the shield after sinking straight section of tunnel collector is in the receiving chamber, constructed in advance on the route of the underground tunnel. This camera is a reversal of the shield and is further elaboration of the chamber walls and the ground along the tunnel.

Following the destruction of the ground shield working body is the removal of the developed soil and the formation of the concrete lining of the tunnel followed by waterproofing the inner surface of the tunnel lining by applying waterproofing.

It was found that when conducting collect the situations tunnels, after performing tunnel lining and drying in preparation for carrying out waterproofing works, the humidity of the concrete surface is too large for a qualitative application of waterproofing. Further drying of the walls of the tunnel does not bring positive results. The walls of the tunnel lining, while under the influence of hydrostatic pressure of the groundwater surrounding the array, pass water through the capillaries and have the higher the humidity, the less quality material (concrete) used in the manufacture of the lining. Especially brightly these negative effects occur in the joints of walls shield the camera and direct tunnel lining.

To eliminate these undesirable processes forming the concrete lining, at least at the junction of the walls of frame cameras and the length of the tunnel from two to ten tunnel diameters produce at least two concentric layers, between which place additional internal waterproofing layer, and applying a waterproofing coating on the inner surface of the concrete lining is produced after complete drying of the surface layer of the walls of the tunnel. If necessary and depending on the hydrogeology of the surrounding soil mass the same technology waterproofing applied throughout the sewer tunnel, including ontinue and the receiving chamber.

The shaping of the lining is at least two successive layers, between which is placed a layer of waterproofing. It can be done in various techniques. For example, after the filing of concrete and pressing the first layer formed on the wall of the layer of the polymer film. Next, the feeding and pressing the second layer of lining.

Instead of the polymer film coating may be covered with a layer of liquid sealant, which is the most preferred.

A possible variant of the simultaneous filing of concrete in two layers with simultaneous flow between the sealant and the subsequent pressing. Subsequent exposure of the finished plot is the hardening and drying of the concrete. Due to the presence of the sealant inside the concrete lining, groundwater under certain hydrostatic pressure, leaks through the capillaries of the concrete lining only in the outer adjacent to the ground layer. Further penetration of water prevents the inner layer of sealant. The inner layer of concrete lining, forming the walls of the tunnel, rapidly loses moisture and dries up required for the application of waterproofing moisture content of about 5%.

Dry wall lining covered by a layer of waterproofing, which can be used more cheap gidroizolyator type, for example, the bitumen is. Application of waterproofing on dry surfaces, in accordance with statutory requirements, allows to obtain a durable coating that protects the inner space of the tunnel from the ingress of moisture for a long time, which dramatically increases the service life of the tunnel, preventing the formation of aggressive environment, destroying the concrete.

1. The way of the shield tunneling engineering services consisting in the construction method "wall" panel cameras to build and outputs of the shield on the route of the underground tunnel and to activate the cell walls of shield jacks working shield, destroying the rock face shield working body, the removal of the destroyed rocks, forming the reinforced concrete tunnel lining and further waterproofing the inner surface of the tunnel lining by applying a waterproofing coating, characterized in that the wall panel of the camera, at least those in which are openings for the passage of the shield, made of a concrete having a compressive strength of not more than 11.5-14,5 MPa, and the reinforcement of concrete produce fiberglass reinforcement from rods with a diameter of 4-10 mm with tensile strength when cut across the grain of not less than 165 MPa, followed by destruction of the walls of the chamber shield working body.

2. The shield driving method of collecting tunnel bookmark is different in construction method "wall" panel mounting and inlet chambers for the Assembly and turning the shield on the route of the underground tunnel and to activate the cell walls of shield jacks desktop shield the destruction of the rock face shield working body, the removal of the destroyed rocks, forming the reinforced concrete tunnel lining and further waterproofing the inner surface of the tunnel lining by applying a waterproofing coating, characterized in that the wall panel of the camera, at least those in which are openings for the passage of the shield, made of a concrete having a compressive strength of not more than 11,5-14,5 MPa, and the reinforcement of concrete produce fiberglass reinforcement from rods with a diameter of 4-10 mm with tensile strength when cut across the grain of not less than 165 MPa, followed by destruction of the walls of the chamber shield working body, molding the concrete lining at least at the junction of the tunnel with a wall panel of the camera and on the length of the tunnel from two to ten diameters produce at least two concentric layers, between which place additional internal waterproofing layer, and applying a waterproofing coating on the inner surface of the concrete lining is produced after complete drying of the surface layer of the walls of the tunnel.



 

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