CN213297985U

CN213297985U - Supporting device for soft rock large-deformation tunnel

Info

Publication number: CN213297985U
Application number: CN202022425660.8U
Authority: CN
Inventors: 张华辉; 王利胜; 杨世强
Original assignee: CCCC Tunnel Engineering Co Ltd
Current assignee: CCCC Tunnel Engineering Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-05-28
Anticipated expiration: 2030-10-28

Abstract

The utility model discloses a supporting device for soft rock large deformation tunnel relates to the soft rock stratum in tunnel and struts technical field, it includes concrete panel and many stock, concrete panel divides into a plurality of arch arcs along its axial, every arch arc is used for supporting the soft rock stratum rather than the laminating of outer arc wall, many stocks divide into in the same direction as stock group and oblique stock group, every stock one end in the same direction as stock group is connected with a certain arch arc, the other end corresponds the soft rock stratum of laminating with this arch arc and is connected, every stock one end in the oblique stock group is connected with a certain arch arc, the other end corresponds the soft rock stratum of laminating with another arch arc and is connected. The utility model discloses a divide into in the same direction as stock group and oblique stock group with the stock, insert as the basis reinforcement in the same direction as the mode of the relative law of stock group, the oblique stock group adopts the not strong slope insertion mode of regularity, can guarantee to obtain supporting between the soft soil layer in adjacent region, reduces the whole risk that collapses or the part collapses of soft soil layer.

Description

Supporting device for soft rock large-deformation tunnel

Technical Field

The utility model relates to a tunnel soft rock layer struts technical field particularly, relates to a supporting device for soft rock large deformation tunnel.

Background

The shotcrete support is also called as anchor shotcrete support, which is a protective measure for reinforcing surrounding rock by combining anchoring and shotcrete. The concrete panel is used as a first inner support protection for a soft rock layer on the surface of a tunnel, then the anchor rod is inserted or inserted to reinforce, one end of the anchor rod is fixed on the concrete panel, the other end of the anchor rod is inserted into the soft rock layer to a certain depth until the anchor rod is inserted into a hard rock layer, and then the support operation of the soft rock layer is completed by grouting and fixing the insertion end of the anchor rod. The existing supporting device is easy to have the risk that the soft soil layer wholly or partially slides or collapses along the radial direction because the anchor rod is inserted too regularly, and particularly, the problem that the reinforcement degree is not enough in the bolt insertion form too regularly for the soft rock large deformation tunnel.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a supporting device for soft rock large deformation tunnel, this supporting device is organized and oblique stock through dividing into the stock in the same direction as stock group, and the mode of the relative law of stock group is inserted as the basis and is consolidated, and oblique stock group adopts the not strong slope insertion mode of regularity, can guarantee to obtain supporting between the soft soil layer in adjacent region, reduces the whole risk that collapses or the part collapses of soft soil layer.

The embodiment of the utility model is realized like this: the utility model provides a supporting device for soft rock large deformation tunnel, including arched concrete panel and many stock, be provided with the support chassis in the concrete panel, the concrete panel divides into a plurality of arch arcs along its axial, every arch arc is used for supporting the soft rock stratum rather than the laminating of outer arc wall, many stock divide into in the same direction as stock group and oblique stock group, every stock one end in the same direction as stock group is connected with a certain arch arc of concrete panel, the other end corresponds the soft rock stratum of laminating with this arch arc and is connected, every stock one end in the oblique stock group is connected with a certain arch arc of concrete panel, the other end corresponds the soft rock stratum of laminating with another arch arc and is connected.

Further, the stock includes the body of rod, the drill bushing, only starch the cover, backing plate and lock nut, it has the slip casting hole to process along its axial in the body of rod, and processing has the spiral line on the outer wall of the body of rod, the drill bushing spiro union is in body of rod one end, only starch the cover spiro union at the body of rod other end, the processing of backing plate middle part has the via hole, and the backing plate passes through its via hole suit on the body of rod, and can allow the body of rod to rotate in the via hole, a lateral surface rotatable coupling that the drill bushing was kept away from to backing plate side terminal surface through universal ball and only starch the cover, the lock nut spiro union is kept away from on the body of rod of drill bushing.

Further, processing has the perforation with the via hole intercommunication on the universal ball, and the perforation can allow the body of rod to pass and rotate in this perforation, and the grout stop sleeve includes straight barrel and awl barrel, and on the straight barrel spiro union body of rod, the undergauge end and the straight barrel one end fixed connection of awl barrel, the flaring end port of awl barrel be with the hemisphere mouth of universal ball rotatable fit, can supply the backing plate to rotate around the relative grout stop sleeve of the centre of a circle of universal ball.

Further, the perforation is including the straight hole section, hemisphere hole section and the taper hole section that connect gradually, and the straight hole section is located hemisphere hole section and is close to the one side of only starching the cover, and lock nut one side shaping has the hemisphere that can supply the body of rod to pass, and the hemisphere can penetrate to hemisphere hole section in through the taper hole section, and the exterior wall of hemisphere and the inner wall rotatable fit of hemisphere hole section.

Furthermore, the reducing end of the taper hole section is connected with the hemispherical hole section.

Furthermore, the backing plate is an arch-shaped plate, the center of the arch is located on one side, away from the drill bushing, of the backing plate, and a rubber pad is bonded on the surface wall, close to the grout stopping sleeve, of the backing plate.

Furthermore, a cylindrical drill bit sleeved on the rod body is formed at one end, far away from the grout stopping sleeve, of the drill sleeve, and a grouting through opening is formed in the side wall of the cylindrical drill bit.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides a supporting device supports arch concrete panel as soft soil layer's inside, and divide into in the same direction as stock group and oblique stock group with the stock, insert in the same direction as the mode that stock group adopted relative law, be about to every arch arc portion with rather than corresponding the soft soil layer region of laminating and be connected, all in the same direction as stock in the stock group stock form basic draw ancient ways and support the back, will incline stock group to adopt the not strong slope insertion mode of regularity, if couple together soft soil layer in different regions and consolidate, in other words, for soft soil layer whole increase horizontal support power, can reduce the whole risk that collapses or the part collapses of soft soil layer, draw solid effect better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a supporting device provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an anchor rod provided by an embodiment of the present invention;

fig. 3 is a schematic view of the connection between the backing plate and the lock nut provided by the embodiment of the present invention.

Icon: 1-concrete panels; 2-anchor rod; 21-down anchor rod group; 22-oblique anchor rod group; 201-a rod body; 202-a drill bushing; 203-barrel drill bit; 204-grouting and passing through the opening; 205-straight cylinder body; 206-cone body; 207-universal ball; 208-a rubber pad; 209-locking nut; 210-a backing plate; 2071-straight hole section; 2072-hemispherical hole segment; 2073-a cone hole section; 2091-nut; 2092-hemisphere; 2093-inner bore.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1, the support device for a large soft rock deformation tunnel according to the present embodiment includes an arched concrete panel 1 and a plurality of anchor rods 2, the concrete panel 1 is used for fitting and supporting a soft rock layer on an inner arc surface of the tunnel, in order to improve a support strength of the concrete panel 1, a support framework is disposed in the concrete panel 1, fig. 1 shows a contour shape of the support framework, and a schematic diagram after concrete pouring is omitted for easy understanding. The concrete panel 1 is divided into a plurality of arc-shaped arc parts along the axial direction, namely, the whole arc-shaped concrete panel 1 is divided into a plurality of arc-shaped arc parts along the radial direction, each arc-shaped arc part is similar to the concrete panel 1 in shape, and except for different lengths, the division mode is convenient for conveniently describing and dividing the insertion position of the subsequent anchor rod 2. Each divided arch arc part is used for supporting soft rock stratums attached to the outer arc wall of the arch tunnel, namely, the inner arc surface of the whole arch tunnel is divided into a plurality of short arc surface areas along the length direction or the axial direction.

The anchor rods 2 are divided into an anchor rod group 21 and an inclined anchor rod group 22, one end of each anchor rod 2 in the anchor rod group 21 is connected with a certain arched arc part of the concrete panel 1, and the other end of each anchor rod 2 is connected with a soft rock stratum correspondingly attached to the arched arc part, namely, the anchor rods 2 in the anchor rod group 21 are in a relatively regular insertion mode, the regular mode refers to insertion in a certain arched arc part and a corresponding cambered surface area, as long as the arched arc parts are divided densely enough, the anchor rods 2 in the anchor rod group 21 can be guaranteed to be pulled and fixed along the radial direction of the arched surface approximately, the pulling and fixing mode can fix the soft soil layer, but the whole soft soil layer is easy to collapse or partially collapse under the action of shearing force due to the fact that the excessively regular insertion mode cannot guarantee the connection strength between adjacent cambered surface areas or spaced cambered surface areas. In order to overcome the problem, one end of each anchor rod 2 in the inclined anchor rod group 22 is connected with one arched arc part of the concrete panel 1, and the other end is connected with a soft rock stratum correspondingly attached to the other arched arc part, namely, the anchor rods 2 in the inclined anchor rod group 22 are used for being inserted obliquely and are connected with soft soil layers in different arched surface areas, so that the connection and the pulling-fixing effects can be achieved among the soft soil layers in different arched surface areas, that is, the supporting force in the axial direction of the arch is increased for most of the whole soft soil layers, and the phenomenon that the soft soil layers collapse due to overlarge shearing force is prevented as much as possible.

Because this application has increased oblique stock group 22, it is different with traditional stock fixed mode, consequently in order to realize the fixed of stock 2 in oblique stock group 22 or draw solid, this application has carried out innovative improvement to stock 2 to can adapt to between stock 2 and the concrete panel 1 slope and the fixed mode of cutting straightly. Specifically, the anchor rod 2 comprises a rod body 201, a drill bushing 202, a grout stopping sleeve, a base plate 210 and a locking nut 209, wherein a grouting hole is processed in the rod body 201 along the axial direction of the rod body, spiral threads are processed on the outer wall of the rod body 201, so that the rod body 201 can be screwed into a soil layer, and grouting is performed according to the grouting hole to fix the screwed end of the rod body. The body of rod 201 inserts after concrete panel 1 pouring is accomplished, and concrete panel 1 embeds the support chassis of constituteing by the reinforcing bar, and the mode of the pipe box of pre-buried slope of rethread makes finished product concrete panel 1 pouring accomplish the back can remain the jack of male to stock 2 alternates. Drill bushing 202 spiro union is in body of rod 201 one end, and drill bushing 202 increases the intensity of the body of rod 201 on the one hand, can insert smoothly and conveniently to the soft soil in situ, and on the other hand expands the diameter to the end of the body of rod 201, can form stable joint point after the pouring finishes to guarantee that the end of inserting of the body of rod 201 inserts stably to the soil layer in. In this embodiment, the drill bushing 202 is used for drilling into one end of a soil layer, that is, one end far away from the grout stopping bushing is formed with a cylindrical drill bit 203 sleeved on the rod body 201, the drill bit 203 is used for increasing the drilling easiness of the soil layer, a grouting through hole 204 is processed on the side wall of the cylindrical drill bit 203, and the grouting through hole 204 is used for forming a connecting bridge after mortar is solidified, that is, the mortar can fix the insertion end of the rod body 201 through the drill bushing 202 or the cylindrical drill bit 203, and can fix the insertion end of the rod body 201 through the grouting through hole 204, so as to achieve a very good fixing effect.

The grout stopping sleeve is screwed on the other end of the rod body 201, in the embodiment, the grout stopping sleeve comprises a straight cylinder body 205 and a conical cylinder body 206, the straight cylinder body 205 is screwed on the rod body 201, the reducing end of the conical cylinder body 206 is fixedly connected with one end of the straight cylinder body 205, and the inner hole diameter of the conical cylinder body 206 is larger than the outer diameter of the rod body 201, namely, the grout stopping sleeve is not contacted with the rod body 201 and is fixed relative to the rod body 201 only through the straight cylinder body 205. Backing plate 210 middle part processing has the via hole, and backing plate 210 is on the body of rod 201 through its via hole suit to can allow the body of rod 201 to rotate in this via hole, the diameter that shows the via hole promptly is greater than the body of rod 201 diameter, can allow the body of rod 201 to walk around the universal certain angle of rotation in hole center, thereby realize that the relative backing plate 210 of the body of rod 201 is the state of slope. The end face of one side of the backing plate 210 is rotatably matched with the end face of one side of the grout stopping sleeve far away from the drill bushing 202 through the universal ball 207, specifically, a through hole communicated with the through hole is formed in the universal ball 207, and similarly, the through hole can allow the rod body 201 to pass through and rotate in the through hole, preferably, the universal ball 207 is a spherical body with two cut-off ends, and the cut surfaces of the two ends are parallel to each other, so that the aperture of the through hole can be ensured to be large enough, and the rod body 201 can be allowed to movably pass through and rotate for a certain angle around the center of the universal ball 207. The diameter-expanding end port of the conical cylinder body 206 is a hemispherical port which is in rotatable fit with the universal ball 207, so that the backing plate 210 can rotate around the center of the universal ball 207 relative to the grout stop sleeve, namely, the spherical surface type rotatable fit of the universal ball 207 and the diameter-expanding end port of the conical cylinder body 206 is shown, and the whole backing plate 210 can be allowed to rotate relative to the grout stop sleeve. Thus, when the rod 201 is inserted in an inclined manner, the pad 210 can rotate relative to the rod 201 to better engage with the inner surface of the concrete panel 1. The lock nut 209 spiro union is kept away from the body of rod 201 of drill bushing 202 one side at backing plate 210 to compress tightly backing plate 210 on ending the thick liquid and sheathe in, after backing plate 201 and the interior surface laminating of concrete panel 1 target in place, through screwing up lock nut 209, just with the whole taut between stereoplasm layer and concrete panel 1 of the body of rod 201, play stable support and draw solid effect.

In this embodiment, the pad plate 210 is an arch plate, also called a meniscus, the center of the arch is located on the side of the pad plate 210 away from the drill bushing 202, the pad plate 210 in this form can be attached to the inner surface of the concrete panel 1 in a relatively adaptive manner, in addition, a rubber pad 208 is bonded to the surface wall of the pad plate close to the grout stop bushing, the rubber pad 208 is used for performing flexible buffering between the rest pad plates 210 of the concrete panel 1 on one hand, and the sealing performance of the corresponding jack ports on the concrete panel 1 is improved on the other hand. Can lock backing plate 210 for lock nut 209 better or more adaptively, universal ball 207 shaping is in backing plate 210's via hole, the perforation adopts the syllogic design, and this perforation is including the straight hole section 2071, hemisphere hole section 2072 and the taper hole section 2073 that connect gradually, and straight hole section 2071 is located hemisphere hole section 2072 and is close to the one side of only starching the cover (cone body 206), and the center of hemisphere hole section 2072 coincides with universal ball 207's center, and taper hole section 2073's undergauge one end is connected with hemisphere hole section 2072. One side of the locking nut 209 is formed with a hemisphere 2092 through which the rod body 201 can pass, that is, the locking nut 209 includes a nut 2091 and a hemisphere 2092 which are coaxially arranged, the form of the hemisphere 2092 is similar to that of the universal ball 207, and an inner hole 2093 of the hemisphere 2092 and an inner hole of the nut 2091 are mutually communicated and coaxially distributed. Hemisphere 2092 can penetrate to hemisphere hole section 2072 in through taper hole section 2073, and hemisphere 2092's outer table wall and hemisphere hole section 2072's inner wall rotatable fit, hemisphere 2092's centre of rotation and universal ball 207's center coincidence, just so enable nut 2091 to carry out the rotation of certain angle through its hemisphere 2092 relative backing plate 210, promptly after the relative backing plate 210 of body of rod 201 inclines, this lock nut 209 still can be screwed up this moment, lock nut 209 can be impressed and laminate to hemisphere hole section 2072 in, thereby reach the purpose of fixing backing plate 210 on concrete panel 1 internal surface.

Through carrying out the innovative design to stock 2, can adapt to when it is in the inclined state, still can be in the laminating state of adaptation ground relatively with concrete panel 1 internal surface to it is not strong to be distinguished from traditional stock 2 adaptability, the condition that can only insert perpendicularly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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. It should be noted that structures or components illustrated in the drawings are not necessarily drawn to scale, and descriptions of well-known components and processing techniques and technologies are omitted to avoid unnecessarily limiting the invention.

Claims

1. The utility model provides a supporting device for soft rock large deformation tunnel, a serial communication port, including arched concrete panel and many stock, be provided with the support chassis in the concrete panel, the concrete panel divides into a plurality of arch arcs, every along its axial arch arc is used for supporting the soft rock stratum rather than the laminating of outer arc wall, many the stock divide into in the same direction as stock group and oblique stock group, every in the same direction as stock group stock one end with one of concrete panel arch arc connects, and the other end corresponds the soft rock stratum of laminating with this arch arc and is connected, every in the oblique stock group stock one end with one of concrete panel arch arc connects, the other end and another the soft rock stratum of laminating is connected to arch arc corresponds.

2. The supporting device for the soft rock large-deformation tunnel according to claim 1, characterized in that the anchor rod comprises a rod body, a drill bushing, a grout stop sleeve, a base plate and a locking nut, a grouting hole is machined along the axial direction of the rod body, spiral threads are machined on the outer wall of the rod body, the drill bushing is in one end of the rod body, the grout stop sleeve is in the other end of the rod body, a through hole is machined in the middle of the base plate, the base plate is sleeved on the rod body through the through hole and can allow the rod body to rotate in the through hole, one side end face of the base plate is in threaded connection with the grout stop sleeve through a universal ball, the side end face of the drill bushing can be in rotatable fit with the base plate, the base plate is far away from one side of the drill bushing, the base plate is arranged on the rod body, and the base plate is tightly pressed on the grout stop.

3. The supporting device for the soft rock large-deformation tunnel according to claim 2, wherein the universal ball is provided with a through hole communicated with the through hole, the through hole can allow the rod body to pass through and rotate in the through hole, the grout stopping sleeve comprises a straight cylinder body and a conical cylinder body, the straight cylinder body is in threaded connection with the rod body, a reducing end of the conical cylinder body is fixedly connected with one end of the straight cylinder body, and a port of a reducing end of the conical cylinder body is a hemispherical port in rotatable fit with the universal ball, so that the base plate can rotate around the center of the universal ball relative to the grout stopping sleeve.

4. The supporting device for the soft rock large-deformation tunnel according to claim 3, wherein the through hole comprises a straight hole section, a hemispherical hole section and a conical hole section which are connected in sequence, the straight hole section is located at one side, close to the grout stopping sleeve, of the hemispherical hole section, a hemisphere body for the rod body to pass through is formed at one side of the locking nut, the hemisphere body can penetrate into the hemispherical hole section through the conical hole section, and the outer surface wall of the hemisphere body is in rotatable fit with the inner wall of the hemispherical hole section.

5. The support device for the soft rock large deformation tunnel according to claim 4, wherein the reduced diameter end of the conical hole section is connected with the hemispherical hole section.

6. The supporting device for the soft rock large deformation tunnel according to claim 2, wherein the base plate is an arch plate, the center of the arch is located on one side, away from the drill bushing, of the base plate, and a rubber pad is bonded on the surface wall, close to the grout stopping sleeve, of the base plate.

7. The supporting device for the soft rock large deformation tunnel according to claim 2, wherein a cylindrical drill bit sleeved on the rod body is formed at one end, far away from the grout stopping sleeve, of the drill bushing, and a grouting through hole is formed in the side wall of the cylindrical drill bit.