CN209780930U - Device for reinforcing tunnel bottom of weak laminar surrounding rock and soft laminar surrounding rock tunnel bottom reinforcing structure thereof - Google Patents

Abstract

the utility model discloses a device that is used for at bottom of weak stratiform country rock tunnel to consolidate and reinforced structure at bottom of weak stratiform country rock tunnel thereof, the reinforced device at bottom of the tunnel include oblique crossing stock and the directional component of stock, be provided with the stock guiding hole of the rock stratum aspect angularly adjustable at the bottom of the relative tunnel on the directional component of stock, the stock guiding hole with oblique crossing stock sliding connection. The utility model discloses can realize that the stock is crossing with the rock stratum wide-angle at the bottom of the tunnel, the effect of "pin" of full play skew stock makes the multilayer rock mass establish ties, resistance between the increase stratum layer to form reinforcing ring in the tunnel basement, improve the stability and the security of inverted arch in construction, operation phase.

Description

Device for reinforcing tunnel bottom of weak laminar surrounding rock and soft laminar surrounding rock tunnel bottom reinforcing structure thereof

Technical Field

The utility model belongs to the technical field of tunnel traffic construction, specifically be a device that is used for reinforcement at bottom of weak stratiform country rock tunnel and reinforced structure at bottom of weak stratiform country rock tunnel thereof.

Background

With the rapid development of the traffic infrastructure business of China, the number of deeply buried and long tunnels is increasingly enlarged. The conditions of the deeply buried and long tunnel surrounding rocks are complex and changeable, and when the tunnel passes through the soft and weak layered surrounding rocks, diseases such as inverted arch bottom bulging, cracking and the like occur. The tunnel bottom structure damage is a common disease phenomenon in tunnel engineering, has persistence, is difficult to from steady, and along with the damaged development of bottom structure, will bring very big potential safety hazard to engineering construction and later stage operation.

at present, tunnel bottom surrounding rock is reinforced by adopting a method of arranging an anchor rod perpendicular to the profile of the bottom of a tunnel in the construction process, but the inclination angle of a tunnel rock stratum is not considered, the anti-bed rock shearing capability of the anchor rod is not fully exerted, the reinforcing effect is general, and diseases such as inverted arch bottom bulging, cracking and the like still occur in the construction and operation periods of partial tunnels.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device that is used for at bottom of weak stratiform country rock tunnel to consolidate and reinforced structure at bottom of weak stratiform country rock tunnel thereof to solve above-mentioned problem.

In order to achieve the purpose, the utility model discloses an at first disclose a device that is used for reinforcement at bottom of weak stratiform country rock tunnel, including oblique crossing stock and the directional component of stock, it is relative to be provided with on the directional component of stock the stock guiding hole of the tunnel bottom profile face angularly adjustable at the bottom of the tunnel, the stock guiding hole with oblique crossing stock sliding connection.

Further, the directional component of stock includes directional board and directional pole, the stock guiding hole sets up the middle part of directional board, the one end of directional board is provided with directional hole, and the other end of this directional board supports through tunnel bottom profile face, the one end of directional pole supports through tunnel bottom profile face, the other end through with directional hole cup joints and the height position supports adjustably the other end of directional board.

Furthermore, the orientation hole is a threaded hole, the orientation rod is in threaded connection with the orientation hole, and nuts are in threaded connection with the upper side and the lower side of the orientation rod, which are positioned on the orientation plate.

Further, the orientation rod is a screw or a bolt.

further, the length of the orientation plate is more than 150mm, the width is more than 150mm, the thickness is more than 6mm, the orientation plate is a steel plate with the grade of not less than Q235B, the nominal diameter of the orientation hole is 8-12mm, and the nominal diameter of the orientation rod is 8-12 mm.

Further, the number of the orientation holes is two, and the orientation holes are oppositely arranged on two sides of the orientation plate.

The utility model discloses a reinforced structure at bottom of weak stratiform country rock tunnel, including above-mentioned scheme be used for the device of reinforcement at bottom of the weak stratiform country rock tunnel, including the skew stock, encircle the bed rock of just supporting layer and tunnel bottom profile face downside, the inverted arch is just laid on the layer the top of tunnel bottom profile face, this tunnel bottom reinforced structure is provided with and passes through the stock spliced eye that the stock guiding hole direction was bored and is established, the stock spliced eye with the stratum aspect between the bed rock is basically perpendicular, the skew stock is pegged graft in the stock spliced eye.

Furthermore, a concrete leveling layer for drilling and marking is laid on the upper side of the tunnel bottom contour surface in the inverted arch primary support layer.

Compared with the prior art, the utility model has the advantages of:

One, the utility model discloses can realize that the anchor rod backing plate intersects with the rock stratum wide-angle at the bottom of the tunnel, the effect of "pin" of full play skew stock makes the multilayer rock mass establish ties, resistance between the increase rock stratum to form the anchor ring in the tunnel basement, improve the stability and the security of inverted arch in construction, operation period.

Secondly, the utility model discloses to directional board drilling, insert directional bolt fixed, the convenience is executed in the field processing, and is with low costs.

Thirdly, the utility model discloses an adjustment directional bolt nut position changes the directional board angle, can be used to the multiple stratum inclination down-skew stock beat establish, application scope is wide.

Fourthly, the utility model discloses after the oblique crossing stock is beaten and is established and finish, can follow the oblique crossing stock and take off, repeatedly usable.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

Fig. 1 is a schematic structural diagram of a tunnel bottom reinforcing device for weak laminar surrounding rock disclosed by the preferred embodiment of the invention;

Fig. 2 is a schematic structural diagram of a tunnel bottom reinforcing structure for weak laminar surrounding rock disclosed by the preferred embodiment of the invention;

fig. 3 is a schematic front view of the orientation plate for the weak laminar surrounding rock tunnel bottom reinforcement device disclosed in the preferred embodiment of the present invention.

illustration of the drawings:

1. An oblique crossing anchor rod; 2. an anchor rod orientation member; 3. a tunnel bottom contour surface; 4. a rock stratum layer; 5. an anchor rod guide hole; 6. an orientation plate; 7. an orientation bar; 8. a directional hole; 9. a nut; 10. primary inverted arch layer; 11. an inverted arch secondary lining 12 and an anchor rod inserting hole; 13. bed rock; 14. and (5) leveling the concrete layer.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

as shown in fig. 1-3, the utility model discloses an at first, a device for reinforcement at bottom of weak stratiform country rock tunnel, including oblique crossing stock 1 and the directional component 2 of stock, be provided with the 3 angularly adjustable stock guiding holes 5 of the tunnel bottom profile face at the bottom of the relative tunnel on the directional component 2 of stock, stock guiding holes 5 and the 1 sliding connection of oblique crossing stock, thereby, through adjusting stock guiding holes 5, make its rock stratum aspect 4 with 3 below tunnel bottom profile faces set up perpendicularly, and then make things convenient for drilling equipment's drill bit to establish with rock stratum aspect 4 vertically stock spliced eye 12 through the guide effect of stock guiding holes 5, and then conveniently insert oblique crossing stock 1.

In this embodiment, the anchor rod orientation member 2 includes orientation board 6 and orientation rod 7, and the anchor rod guiding hole 5 sets up in the middle part of orientation board 6, and the one end of orientation board 6 is provided with orientation hole 8, and this other end of orientation board 6 supports through tunnel bottom profile face 3, and the one end of orientation rod 7 supports through tunnel bottom profile face 3, and the other end supports the other end of orientation board 6 through cup jointing with orientation hole 8 and height position adjustable support to it is adjustable, and fixed to realize that the inclination of orientation board 6 on tunnel bottom profile face 3 is adjustable. Specifically, the directional hole 8 is a threaded hole, the directional rod 7 is in threaded connection with the directional hole 8, and the directional rod 7 is located on the upper side and the lower side of the directional plate 6 and is in threaded connection with nuts 9. During actual construction, the orientation rod 7 is a screw or a bolt. The length of the orientation plate 6 is more than 150mm, the width is more than 150mm, the thickness is more than 6mm, the orientation plate 6 is a steel plate with the grade of not less than Q235B, the nominal diameter of the orientation hole 8 is 8-12mm, and the nominal diameter of the orientation rod 7 is 8-12 mm. In the present embodiment, in order to stably support the orientation holes 8, the number of the orientation holes 8 is two, and the two are oppositely disposed on the left and right sides of the orientation plate 6.

Then, the utility model discloses a reinforced structure at bottom of weak stratiform country rock tunnel, including the device that is used for at bottom of the weak stratiform country rock tunnel of above-mentioned scheme to consolidate, including oblique crossing stock 1, the inverted arch just props up layer 10 and is located the layer rock 13 of tunnel bottom profile face 3 downside, for concrete layer, the inverted arch just props up layer 10 and is the concrete, the two linings 11 of inverted arch of concrete material have still been laid on it, the inverted arch just props up layer 10 and lays in the top of tunnel bottom profile face 3, be provided with the stock spliced eye 12 that bores through stock guide hole 5 direction on this reinforced structure at the bottom of the tunnel, stock spliced eye 12 is basically perpendicular with stratum aspect 4, the one end of oblique crossing stock 1 is pegged graft in stock spliced eye 12, the other end exposed part is submerged in the inverted arch just props up layer 10.

in the practical application process, the utility model discloses a use method as follows:

the method comprises the following steps: drilling the directional plate 6 to form an anchor rod guide hole 5;

Step two: after the tunnel inverted arch is excavated, removing the virtual slag, accumulated water and the like on the tunnel bottom contour surface 3, and applying a sprayed concrete leveling layer 14 to level and mark the drilling position, wherein the thickness is controlled to be 3-5 cm, so that the increase of subsequent drilling workload caused by over-thickness is avoided;

Step three: marking the driving positions of the oblique anchor rods 1 on the sprayed concrete leveling layer 14, wherein the circumferential distance of the oblique anchor rods 1 is 1-1.5 m, and the axial distance of the tunnel is 1 or 2 times the distance between primary support steel frames and is arranged in a quincunx shape;

step four: installing an anchor rod orientation component 2 at the mark position, adjusting the angle of an orientation plate 6 through an orientation rod 7 and a nut 9, enabling the orientation plate 6 to be approximately parallel to a rock stratum surface 4, namely enabling an oblique crossing anchor rod 1 to be approximately vertically crossed with the rock stratum surface 4, and determining the dip angle alpha of the rock stratum surface 4 according to surrounding rocks exposed from a working face with the same mileage;

step five: vertically penetrating through the anchor rod guide hole 5 to drill a hole in the sprayed concrete leveling layer 14, determining the hole diameter and the depth according to the model specification of the oblique anchor rod 1, and installing the oblique anchor rod 1;

Step six: erecting an initial support steel frame according to the design, spraying concrete to the designed thickness, constructing an inverted arch initial support layer 10, wherein the inverted arch initial support layer 10 covers the exposed part of the oblique anchor rod 1, and then paving an inverted arch secondary lining 11 and other fillers on the inverted arch initial support layer 10.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a device that is used for at bottom of weak stratiform country rock tunnel to consolidate, its characterized in that includes oblique crossing stock (1) and stock directional component (2), be provided with on the stock directional component (2) relatively at the bottom of the tunnel profile face (3) angularly adjustable stock guiding hole (5), stock guiding hole (5) with oblique crossing stock (1) sliding connection.

2. The device for reinforcing the tunnel bottom of the weak laminar surrounding rock according to claim 1, wherein the anchor rod orientation member (2) comprises an orientation plate (6) and an orientation rod (7), the anchor rod guide hole (5) is arranged in the middle of the orientation plate (6), one end of the orientation plate (6) is provided with an orientation hole (8), the other end of the orientation plate (6) is supported by the tunnel bottom contour surface (3), one end of the orientation rod (7) is supported by the tunnel bottom contour surface (3), and the other end of the orientation rod (7) is connected with the orientation hole (8) in a sleeved mode to support the other end of the orientation plate (6) in a height-position-adjustable mode.

3. The device for reinforcing the tunnel bottom of the weak laminar surrounding rock according to claim 2, wherein the orientation hole (8) is a threaded hole, the orientation rod (7) is in threaded connection with the orientation hole (8), and nuts (9) are in threaded connection with the orientation rod (7) on the upper side and the lower side of the orientation plate (6).

4. the device for reinforcing the tunnel bottom of the weak laminar surrounding rock according to claim 3, wherein the orientation rod (7) is a screw rod or a bolt.

5. The device for the tunnel bottom reinforcement of the weak laminar surrounding rock according to claim 4, wherein the length of the orientation plate (6) is more than 150mm, the width is more than 150mm, the thickness is more than 6mm, the orientation plate (6) is a steel plate with the grade of no less than Q235B, the nominal diameter of the orientation hole (8) is 8-12mm, and the nominal diameter of the orientation rod (7) is 8-12 mm.

6. The device for reinforcing the tunnel bottom of the weak laminar surrounding rock according to any one of claims 2 to 5, wherein the number of the directional holes (8) is two, and the two directional holes are oppositely arranged on two sides of the directional plate (6).

7. A tunnel bottom reinforcing structure for soft laminar surrounding rock, which comprises the device for the tunnel bottom reinforcing of the soft laminar surrounding rock as claimed in any one of claims 1 to 6, and is characterized by comprising an oblique crossing anchor rod (1), an inverted arch primary support layer (10) and a layer rock (13) on the lower side of a tunnel bottom contour surface (3), wherein the inverted arch primary support layer (10) is laid above the tunnel bottom contour surface (3), the tunnel bottom reinforcing structure is provided with an anchor rod inserting hole (12) which is guided and drilled through the anchor rod guide hole (5), the anchor rod inserting hole (12) is basically vertical to a rock layer surface (4) between the layer rocks (13), one end of the oblique crossing anchor rod (1) is inserted into the anchor rod inserting hole (12), and the other end of the oblique crossing anchor rod is immersed into the inverted arch primary support layer (10).

8. The weak laminar surrounding rock tunnel bottom reinforcing structure of claim 7, characterized in that a concrete leveling layer (14) for drilling marking is laid on the upper side of the tunnel bottom contour surface (3) in the inverted arch primary support layer (10).