CN219711525U - Supporting device for treating tunnel collapse cavity - Google Patents

Abstract

The utility model relates to a support device for treating a tunnel collapse cavity, comprising: the bearing bracket is positioned at the middle upper part of the collapse cavity and comprises a steel flower pipe which can be embedded into the side wall of the collapse cavity; the bearing bracket comprises an inner ring flat frame, an outer ring flat frame and a connecting strut, the steel flower pipe is movably arranged between the inner ring flat frame and the outer ring flat frame, and grouting holes are formed in the steel flower pipe; the bearing support is provided with a net sheet. The material backfilled at the upper part of the collapse cavity can be supported, and meanwhile, the top area of the collapse cavity can be grouting reinforced, so that the stability of the top structure is enhanced.

Description

Supporting device for treating tunnel collapse cavity

Technical Field

The utility model relates to the technical field of tunnel excavation, in particular to a supporting device for treating a tunnel collapse cavity.

Background

In the construction process of the tunnel, due to the characteristics of different geology, collapse can occur at the unsupported section of the surrounding rock of the tunnel construction face to form an unstable permeable collapse cavity area, and if the collapse cavity is not treated in time, the risk of further expanding the collapse area exists. And, the unstable structure of subsidence cavity lateral part can drop to the face region at any time, influences the preliminary bracing of face and the follow-up construction of tunnel.

The conventional construction for treating the collapse cavity comprises backfilling, filling the whole collapse cavity area with foam concrete, broken stone or plain soil, and grouting after filling the collapse cavity. The construction mode is used for completely filling the collapse cavity, on one hand, the backfill amount and the construction amount of the backfill are increased, on the other hand, the backfill material of the collapse cavity can not fall into the tunnel face area for the second time, and as the tunnel construction process comprises the procedure processes of the tunnel face, the primary support and the secondary lining, when the primary support is carried out on the tunnel face area corresponding to the collapse cavity, the fallen backfill material is required to be excavated for the second time, repeated operation is formed, the normal process of tunnel construction is seriously influenced, and the falling safety risk is formed.

In order to improve the geological environment of the collapsed cavity area and ensure the stability of surrounding rocks around the collapsed cavity, the top of the collapsed cavity needs to be reinforced, and the top backfill material needs to be loaded by a necessary device.

Disclosure of Invention

The utility model aims to provide a supporting device for treating a collapse cavity of a tunnel, which can support materials backfilled at the upper part of the collapse cavity and can perform grouting reinforcement on the top area of the collapse cavity.

In order to achieve the above object, the present utility model provides a support device for treating a tunnel collapse cavity, comprising: the bearing bracket is positioned at the middle upper part of the collapse cavity and comprises a steel flower pipe which can be embedded into the side wall of the collapse cavity;

the bearing bracket comprises an inner ring flat frame, an outer ring flat frame and a connecting strut, the steel flower pipe is movably arranged between the inner ring flat frame and the outer ring flat frame, and grouting holes are formed in the steel flower pipe;

the bearing support is provided with a net sheet.

In an alternative embodiment, the steel flower pipe comprises a plurality of steel flower pipes which are distributed in a divergent manner in the circumferential direction of the bearing bracket.

In an alternative embodiment, the steel tube runs obliquely downwards from inside to outside in the radial direction of the support bracket.

In an alternative embodiment, the steel flower pipe comprises a connecting section, the connecting section is detachably lapped on the inner ring flat frame and is abutted to the lower part of the outer ring flat frame, a tension spring is connected between the outer ring flat frame and the connecting section, and the tension spring is arranged on the pipe walls of two sides of the connecting section relative to the outer ring flat frame.

In an alternative embodiment, the end of the steel flowtube is of a wedge-shaped tip structure, the grouting hole comprises a tip discharge hole and a side wall discharge hole, the tip discharge hole is arranged at the tip of the steel flowtube, and the side wall discharge hole is arranged on the side wall close to the tip.

In an alternative embodiment, the connecting section comprises a feed inlet, and the tip discharge port and the side wall discharge port are both communicated with the feed inlet.

In an alternative embodiment, the inner ring flat frame and the outer ring flat frame are assembled by welding with screw steel, and respectively comprise polygonal structures with the same number of sides, and the connecting struts are used for connecting the inner ring flat frame and the outer ring flat frame in a combined manner.

In an alternative embodiment, the connection struts are divergently distributed in the circumferential direction of the inner ring flat frame and the outer ring flat frame, and each connection strut is simultaneously connected with the corner parts of the inner ring flat frame and the outer ring flat frame and is converged and cross-connected in the center of the bearing bracket.

In an alternative embodiment, the steel pipe is arranged in the middle of each side edge of the inner ring flat frame and the outer ring flat frame.

In an alternative embodiment, the mesh is fully distributed on the bearing bracket and welded and fixed with the bearing bracket.

According to the utility model, the bearing support is arranged at the upper middle part of the collapse cavity, so that the top area of the collapse cavity can be selectively backfilled, meanwhile, grouting can be carried out on the side wall at the upper middle part of the collapse cavity, and the geological structure of the side wall at the top can be stabilized on the premise of ensuring grouting fixation of the backfill material at the upper middle part of the collapse cavity, thereby effectively reducing the construction amount and the operation amount of integral backfilling and avoiding further expansion of the collapse area.

The backfilling form and the backfilling grouting of the upper middle part of the collapse cavity are selected, so that the structural stability of the upper middle part of the collapse cavity is effectively enhanced.

The bearing support can play a role in supporting selective backfill materials, can embed a steel floral tube included by the bearing support into the side wall of the collapse cavity, is combined with a grouting hole arranged on the steel floral tube, and can perform grouting fixation on the top area of the collapse cavity so as to enhance the structural stability of the collapse cavity.

The steel flower pipe is movably arranged between the inner ring flat frame and the outer ring flat frame, after the bearing support is lifted in place, the bearing support is pressed down, so that the steel flower pipe is further inserted into the side wall of the collapse cavity, and the grouting hole at the insertion part is used for grouting and fixing the inner part of the side wall at the upper part of the collapse cavity on the premise that the steel flower pipe is supported and erected on the bearing support.

The net piece arranged on the bearing support can bear and intercept coarse aggregate earth and stone backfilled at the upper part of the collapse cavity, and is beneficial to filling foam concrete into the coarse aggregate earth and stone so as to realize the blocking of the upper part of the collapse cavity.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a support device for handling a tunnel collapse cavity according to the present utility model;

fig. 2 is a schematic view of the arrangement structure of the steel pipe on the bearing bracket.

Icon:

1-a bearing bracket; 11-an inner ring flat frame; 12-an outer ring flat frame; 13-connecting struts; 14-a tension spring;

2-steel flower pipe; 21-a connecting segment; 22-a feed inlet; 23-a tip discharge port; 24-a side wall discharge hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the present utility model, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put in use of the product of this application, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The supporting device for treating the collapse cavity of the tunnel is mainly used for treating the permeable collapse cavity in the non-shield tunnel excavation process, specifically, the backfilling mode is selected in a targeted mode for the collapse cavity, the material amount and the labor amount of overall backfilling are reduced, the supporting device is used for supporting and bearing the selectively backfilled material, grouting fixation of the top side wall of the collapse cavity can be achieved, and the geological structure is stabilized.

Referring to fig. 1-2, the supporting device for treating the collapse cavity of the tunnel is mainly used for bearing the selective backfill material of the upper middle part of the collapse cavity, grouting and reinforcing the side wall of the top of the collapse cavity, and improving the structural stability of the rock mass of the upper middle part of the collapse cavity.

The main structure of the supporting device comprises a bearing bracket 1 positioned at the upper middle part of the collapse cavity, wherein the bearing bracket 1 is specifically used for bearing coarse aggregate soil and stones which are selectively backfilled and foam concrete filled in the coarse aggregate soil and stones so as to complete the blocking of the upper middle part of the collapse cavity.

The bearing support 1 is fixed at the middle upper part of the collapse cavity through the steel pipe 2 which can be embedded into the side wall of the collapse cavity, the bearing support 1 comprises an inner ring flat frame 11, an outer ring flat frame 12 and a connecting support rod 13, and the connecting support rod 13 is mainly used for connecting the inner ring flat frame 11 and the outer ring flat frame 12 into an integral structure so as to ensure the integral structural stability of the bearing support 1.

The steel pipe 2 is movably arranged between the inner ring flat frame 11 and the outer ring flat frame 12, and can be further embedded into the side wall of the upper part of the collapse cavity under the action of the downward pressure by pressing down the bearing bracket 1 after the bearing bracket 1 reaches a preset position, so that the fixing of the bearing bracket 1 on the upper part of the collapse cavity is completed.

The steel flowtube 2 is provided with grouting holes, and external concrete slurry can be injected into the side wall of the upper part in the collapse cavity in a mode of externally connecting a concrete grouting hose so as to stabilize the geological structure of the part where the bearing bracket 1 is located.

The backfilled coarse aggregate earth and stone can be intercepted by the net sheet arranged on the bearing support 1, so that the follow-up filling of foam concrete in the coarse aggregate earth and stone is facilitated, and the blocking of the upper part in the collapse cavity is realized.

In one specific embodiment, the steel pipe 2 comprises a plurality of pipes which are divergently arranged on the circumference of the bearing support 1, and in the process of installing the bearing support 1, the tunnel face part at the bottom of the collapse cavity is cleaned first, and earthwork falling to the tunnel face when the collapse cavity is formed is cleaned. Then the bearing bracket 1 is lifted from bottom to top by the tunnel face part at the bottom of the collapse cavity, and the tail ends of the plurality of steel flower pipes 2 which are arranged in a divergent way can be contacted with the side wall of the collapse cavity.

The steel flower pipe 2 extends downwards from inside to outside on the bearing support 1, can be embedded into the softer side wall of the collapse cavity in the lifting process of the bearing support 1, and meanwhile, the tension spring 14 for preventing the steel flower pipe 2 from being folded downwards after touching the side wall of the collapse cavity is arranged on the bearing support 1, so that the steel flower pipe 2 can be kept in a divergent and outwards-stretched state in the whole lifting process of the bearing support 1, and the tail end of the steel flower pipe 2 is kept in abutting embedding relation with the side wall of the collapse cavity.

When the bearing bracket 1 is lifted to the top of the collapse cavity, the bearing bracket 1 is pressed down to apply pressure, so that the end part of the steel flower pipe 2 is fully inserted into the side wall of the collapse cavity under the action of the downward pressure, and the upper part of the bearing bracket 1 in the collapse cavity is fixed.

From the perspective of being convenient for the steel flower pipe 2 to play the connection support and fix the bearing bracket 1, further, the steel flower pipe 2 comprises a connecting section 21 positioned at the bearing bracket 1, and the connecting section 21 is detachably lapped on the inner ring flat frame 11 and is abutted on the lower part of the outer ring flat frame 12 to form a clamping and erecting state of the steel flower pipe 2 on the bearing bracket 1.

After the steel floral tube 2 is embedded and fixed on the side wall of the collapse cavity, the connecting section 21 can support the bearing bracket 1 under the action of the lever, so that the bearing bracket can reliably bear the subsequent backfilled coarse aggregate soil and stones and filled foam concrete.

The mobility of the steel tube 2 is in particular such that it is inserted in the side wall of the collapsed cavity when the carrier 1 is depressed, while at the same time not being able to disengage the end of the steel tube 2 from its tight abutment with the side wall of the collapsed cavity when lifted. It is therefore necessary to take account of the mobility of the steel tube 2 and its relative fixing on the support 1 in a certain range during the lifting of the support 1.

In order to meet the above requirement, a tension spring 14 is connected between the outer ring flat frame 12 and the connecting section 21, specifically, when the side wall of the collapse cavity causes obstruction to the end of the steel flower pipe 2 during lifting of the bearing bracket 1, the tension spring 14 can keep the steel flower pipe 2 in a relatively constant outwards-stretched state by self-contraction elasticity, and the tail end of the steel flower pipe 2 can slide upwards in a state of abutting against the side wall of the collapse cavity in the lifting process in combination with the arrangement mode that the steel flower pipe 2 is inclined and extends downwards from inside to outside.

In order to ensure a reliable spring force, the tension springs 14 are arranged on the two pipe walls of the connecting section 21 opposite to the outer ring flat frame 12, so that the outward stretching state of the steel pipe 2 on the bearing bracket 1 can be ensured to the greatest extent.

After lifting in place, the tension spring 14 is in the maximum stretching state, the tension spring 14 can be restored to deform by pressing down the bearing bracket 1, meanwhile, the steel flower pipe 2 is inserted into the side wall of the collapse cavity through the linkage effect, and the steel flower pipe 2 connecting section 21 which is lapped on the upper part of the inner ring flat frame 11 and is abutted against the lower part of the outer ring flat frame 12 is combined, so that the steel flower pipe 2 is clamped with the inner ring flat frame 11 and the outer ring flat frame 12 to form the supporting and fixing of the bearing bracket 1 under the action of the steel flower pipe 2.

The tail end of the steel pipe 2 is of a wedge-shaped tip structure, and can slide on the side wall of the collapse cavity, meanwhile, when the bearing support 1 is pressed down, the tip structure is conveniently embedded and inserted into the side wall of the collapse cavity, and the fixing of the steel pipe 2 at the upper part in the collapse cavity is realized.

After the fixing of the bearing bracket 1, the concrete paste is injected into the side wall into which the steel flowtube 2 is inserted by grouting Kong Chong by grouting the steel flowtube 2.

Specifically, the grouting hole comprises a tip discharge hole 23 and a side wall discharge hole 24, wherein the tip discharge hole 23 is arranged at the tip of the steel flower pipe 2, and the side wall discharge hole 24 is arranged on the side wall close to the tip. The linkage segment 21 includes feed inlet 22, and pointed end discharge gate 23, lateral wall discharge gate 24 all communicate with each other with feed inlet 22, can carry outside concrete slurry to get into steel pipe 2 through feed inlet 22, and then make the slurry that pours into fill into the lateral wall of caving in the cavity through pointed end discharge gate 23, lateral wall discharge gate 24, effectively constitute the slip casting fixed to steel pipe 2 grafting position, guaranteed simultaneously to bear the reliable stability of support 1 installation.

Through the grouting operation of the steel pipe 2, the geology of the upper part of the collapse cavity can be stabilized, and further the backfilling of the upper part of the collapse cavity, namely, the upper part of the bearing bracket 1 is facilitated.

The inner ring flat frame 11 and the outer ring flat frame 12 are specifically welded and assembled by screw steel, respectively comprise polygonal structures with the same number of sides, and are connected by combining the inner ring flat frame 11 and the outer ring flat frame 12 through connecting support rods 13.

In order to enhance the overall structural stability of the bearing bracket 1, the connecting struts 13 are divergently distributed in the circumferential direction of the inner ring flat frame 11 and the outer ring flat frame 12, and each connecting strut 13 is simultaneously connected with the corner parts of the inner ring flat frame 11 and the outer ring flat frame 12.

The plurality of connecting struts 13 which are distributed in a divergent way are gathered and connected in a cross way at the center of the bearing bracket 1 to form a bracket at the inner side of the inner ring flat frame 11, so that effective bearing of the subsequent backfill materials can be formed.

In order to ensure that the steel floral tubes 2 effectively support the bearing bracket 1, each steel floral tube 2 is arranged in the middle of each side edge on the inner ring flat frame 11 and the outer ring flat frame 12, and interference between the steel floral tubes 2 and the connecting support rods 13 can be avoided, so that bearing force is distributed more uniformly on the inner ring flat frame 11 and the outer ring flat frame 12.

After the grouting fixation of the steel pipe 2 to the side wall of the upper part of the collapse cavity is completed, the material which is backfilled and filled is carried by arranging a net sheet on the bearing bracket 1. The net sheet specifically comprises a steel bar net sheet formed by welding steel bars, wherein the steel bar net sheet is fully distributed on the bearing support 1 and welded and fixed with the bearing support 1, coarse aggregate soil and stones are fully filled in the space between the bearing support 1 and the pit mouth part of the collapse cavity, foam concrete is fully filled in the gaps between the coarse aggregate soil and stones, and the plugging operation of the upper part in the collapse cavity is completed.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A support device for handling a tunnel collapse cavity, comprising: the bearing bracket is positioned at the middle upper part of the collapse cavity and comprises a steel flower pipe which can be embedded into the side wall of the collapse cavity;

the bearing bracket comprises an inner ring flat frame, an outer ring flat frame and a connecting strut, the steel flower pipe is movably arranged between the inner ring flat frame and the outer ring flat frame, and grouting holes are formed in the steel flower pipe;

the bearing support is provided with a net sheet.

2. The support device for treating a tunnel collapse cavity according to claim 1, wherein said steel flower tubes comprise a plurality of said steel flower tubes divergently distributed in a circumferential direction of said bearing bracket.

3. The support device for treating a tunnel collapse cavity according to claim 2, wherein the steel flower tube extends obliquely downward from inside to outside in a radial direction of the bearing bracket.

4. A support arrangement for a treatment of a tunnel collapse cavity according to claim 3, wherein the steel flower tube comprises a connecting section detachably lapped on the inner ring flat frame and abutting against the lower part of the outer ring flat frame, a tension spring being connected between the outer ring flat frame and the connecting section, the tension spring being arranged on the wall of the connecting section on both sides relative to the outer ring flat frame.

5. The support device for treating a tunnel collapse cavity of claim 4, wherein the distal end of the steel flowtube is of a wedge-shaped tip structure, the grouting holes include tip discharge ports provided at the tips of the steel flowtube and side wall discharge ports provided on the side walls adjacent to the tips.

6. The support device for treating a tunnel collapse cavity according to claim 5, wherein the connecting section includes a feed port, and wherein the tip discharge port and the sidewall discharge port are both in communication with the feed port.

7. The support arrangement for be used for handling tunnel subsidence cavity of claim 1, wherein, inner ring flat frame with outer ring flat frame is assembled by the screw steel welding, includes the polygon structure of same limit number respectively, connecting branch will inner ring flat frame with outer ring flat frame composite connection.

8. The support device for treating a tunnel collapse cavity according to claim 7, wherein the connecting struts are divergently distributed in the circumferential direction of the inner ring flat frame and the outer ring flat frame, and each connecting strut is simultaneously connected to the corner portions of the inner ring flat frame and the outer ring flat frame and is gathered and cross-connected at the center of the bearing bracket.

9. The support device for treating a tunnel collapse cavity according to claim 7, wherein the steel flower pipe is provided at the middle of each side edge on the inner ring flat frame and the outer ring flat frame.

10. The support device for treating a tunnel collapse cavity according to any one of claims 1 to 9, wherein the mesh is fully distributed over and welded to the carrier.