Blocking and filling structure for large karst cave of shield crossing karst area

Abstract

The utility model relates to the technical field of karst cave plugging, in particular to a large karst cave plugging and filling structure for a shield penetrating karst area, which comprises a connecting cover and a mold bag, a supporting rod is fixedly connected to the surface of the connecting cover, a cover plate is connected to the surface of the supporting rod in a clamping manner, and a magnetic block is arranged on the surface of the cover plate. A protective cover is attracted to the surface of the cover plate through a magnetic block, a mold bag is arranged on the inner side of the connecting cover, and a connecting pipe is fixedly connected to the end, away from the connecting cover, of the mold bag. According to the utility model, through the action of the mold bag, the flowability of grouting slurry is limited, the use of solidification of the grouting slurry is accelerated, under the action of the mold bag, the grouting area is limited, the grouting slurry can be used according to the required grouting space, the waste of the slurry is reduced, and the operation performance and effect of plugging and filling are improved; the protection effect on the mold bag when the mold bag is not used is achieved, and the mold bag can be conveniently transported and put into the mold bag for use.

Description

Technical Field

[0001] The utility model relates to the technical field of karst cave plugging, in particular to a plugging and filling structure for large karst caves when a shield machine passes through a karst area. Background Technique

[0002] A karst cave refers to a natural cave formed by limestone being dissolved and corroded by flowing water containing carbon dioxide. During the shield construction process, karst caves have a great impact on its progress and are extremely likely to cause shield safety accidents. Usually, the treatment method for karst caves is grouting to fill their space. However, when grouting and filling some karst caves with a large space, the internal space is large, the injected slurry has a large fluidity and is not easy to solidify. Moreover, for a large space, the space occupied by the shield machine is small, but the volume of grouting is large, resulting in an increase in cost and waste of slurry. Content of the Utility Model

[0003] The purpose of the utility model is to provide a plugging and filling structure for large karst caves when a shield machine passes through a karst area, so as to solve the problems mentioned in the above background technique, that is, the internal space is large, the injected slurry has a large fluidity and is not easy to solidify, and for a large space, the space occupied by the shield machine is small, but the volume of grouting is large, resulting in an increase in cost and waste of slurry.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A plugging and filling structure for large karst caves when a shield machine passes through a karst area, including a connecting cover and a formwork bag. A support rod is fixedly connected to the surface of the connecting cover. A cover plate is snap-connected to the surface of the support rod. A magnetic block is arranged on the surface of the cover plate. A protective cover is adsorbed on the surface of the cover plate through the magnetic block. A formwork bag is arranged inside the connecting cover. One end of the formwork bag far away from the connecting cover is fixedly connected with a connecting pipe. An air filling pipe and a grouting pipe are connected to the surface of the connecting pipe through a passage. A connecting rod is threadedly connected to the outer surface of the connecting pipe. A clamping groove is opened on the surface of the support rod. A groove is opened on the inner wall of the clamping groove, and a support spring is fixedly connected to the inside of the groove. A resisting ball is fixedly connected to the surface of the support spring. Clamping rods are fixedly connected to both sides of the cover plate.

[0005] Preferably, the formwork bags are distributed in a spiral shape inside the connecting cover and the cover plate, and the cover plates are distributed in four groups on the surface of the connecting cover.

[0006] Preferably, the cover plate, the support rod and the protective cover form a cavity body with the connecting cover, and the connecting pipe penetrates through the surface of the protective cover and is connected to the formwork bag through a passage.

[0007] Preferably, there are folds in the distribution where the connecting pipe contacts the formwork bag, and the air filling pipe and the grouting pipe are connected to the formwork bag through the connecting pipe through a passage.

[0008] Preferably, the connecting rod is connected between the inflatable pipe and the grouting pipe through a connecting pipe. The support rod is distributed in a long rod shape on the surface of the connecting cover, and the cover plate is connected to the connecting cover through the support rod.

[0009] Preferably, the clamping rod is in a cylindrical shape and is fitted and connected with the clamping groove. The clamping grooves are distributed in two groups on both sides of the support rod in an opposing manner. The abutting balls are distributed in two groups on the opposing sides of the clamping groove, and the number of abutting balls in each group is two.

[0010] Preferably, the abutting ball is elastically slidably connected to the inner groove of the clamping groove through a support spring, and the abutting ball is in abutting contact with the clamping rod through the support spring.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. Through the connection between the connecting cover and the formwork bag, under the connection of the formwork bag and the connecting pipe, and through the action of the inflatable pipe and the grouting pipe, the operations of inflating and grouting the formwork bag are realized, changing the working volume of the formwork bag. Through the action of the formwork bag, the fluidity of the grouting slurry is limited, accelerating its solidification. Moreover, under the action of the formwork bag, the grouting area is limited, and it can be used according to the required grouting space, reducing the waste of slurry and improving the operation performance and effect of plugging and filling.

[0013] 2. Through the connection between the connecting cover and the support rod, under the action of the clamping groove and the abutting ball, the clamping connection of the cover plate on the support rod is realized. Under the connection of the cover plate and the protective cover, the protective effect of the connection of the formwork bag on the connecting cover is achieved. Moreover, under the abutting contact of the clamping rod and the abutting ball, when grouting the formwork bag, under the influence of the pressure, the cover plate falls off from the connecting cover, facilitating the rapid injection of slurry into the formwork bag. Under the action of the cover plate, the protective effect of the formwork bag when not in use is realized, and it is convenient for its transportation and placement operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the engineering schematic diagram of the present utility model;

[0015] Figure 2 is the front three-dimensional schematic diagram of the structure of the present utility model;

[0016] Figure 3 is the front three-dimensional sectional schematic diagram of the structure of the present utility model;

[0017] Figure 4 is the partial three-dimensional explosion schematic diagram of the structure of the present utility model;

[0018] Figure 5 is the partial sectional three-dimensional explosion schematic diagram of the connection structure between the support rod and the cover plate of the present utility model.

[0019] In the figure: 1. Connecting cover; 11. Support rod; 12. Card slot; 13. Support spring; 14. Contact ball; 2. Formwork bag; 21. Connecting pipe; 3. Inflating pipe; 4. Grouting pipe; 5. Connecting rod; 6. Protective cover; 7. Cover plate; 71. Card rod. Specific implementation manner

[0020] Please refer to Figures 1-5 , an embodiment provided by the present utility model:

[0021] A large - scale karst cave plugging and filling structure for shield tunneling through karst areas, comprising a connecting cover 1 and a formwork bag 2. A support rod 11 is fixedly connected to the surface of the connecting cover 1. A cover plate 7 is snap - connected to the surface of the support rod 11. Magnets are arranged on the surface of the cover plate 7, and a protective cover 6 is adsorbed on the surface of the cover plate 7 through the magnets. A formwork bag 2 is arranged inside the connecting cover 1. One end of the formwork bag 2 away from the connecting cover 1 is fixedly connected to a connecting pipe 21. An inflating pipe 3 and a grouting pipe 4 are connected to the surface of the connecting pipe 21 through a passage. A connecting rod 5 is thread - connected to the outer surface of the connecting pipe 21. Card slots 12 are formed on the surface of the support rod 11. Grooves are formed on the inner wall of the card slots 12, and a support spring 13 is fixedly connected to the inside of the grooves. A contact ball 14 is fixedly connected to the surface of the support spring 13. Card rods 71 are fixedly connected to both sides of the cover plate 7. Through the connection of the connecting cover 1 and the formwork bag 2, and under the connection of the support rod 11 and the cover plate 7, the protective effect of the formwork bag 2 connected to the connecting cover 1 is realized. Under the action of the inflating pipe 3 and the grouting pipe 4, by connecting the inflating pipe 3 to an air pump and connecting the grouting pipe 4 to grouting equipment, the inflation and grouting operations of the formwork bag 2 during use are completed.

[0022] Furthermore, the formwork bag 2 is spirally distributed inside the connecting cover 1 and the cover plate 7. The cover plates 7 are distributed in four groups on the surface of the connecting cover 1. Due to the shape of the formwork bag 2, it is convenient to store inside the connecting cover 1 and the cover plate 7. Under the action of the cover plate 7, the protective effect on the formwork bag 2 is achieved.

[0023] Furthermore, the cover plate 7 and the protective cover 6 form a cavity body with the connecting cover 1 through the support rod 11. The connecting pipe 21 passes through the surface of the protective cover 6 and is connected to the formwork bag 2 through a passage. Through the connection of the support rod 11 and the connecting cover 1, under the action of the support rod 11, the connection and support effect of the cover plate 7 on the connecting cover 1 is realized.

[0024] Furthermore, there are wrinkles in the distribution where the connecting pipe 21 contacts the formwork bag 2. The inflating pipe 3 and the grouting pipe 4 are connected to the formwork bag 2 through the connecting pipe 21 through a passage. Due to the connection between the formwork bag 2 and the connecting pipe 21, under the action of the wrinkles, it is convenient for the volume change of the formwork bag 2 during inflation and will not cause the rupture of the connection between the formwork bag 2 and the connecting pipe 21.

[0025] Furthermore, the connecting rod 5 is connected between the air charging pipe 3 and the grouting pipe 4 through the connecting pipe 21. The support rod 11 is distributed in a long rod shape on the surface of the connecting cover 1. The cover plate 7 is connected to the connecting cover 1 through the support rod 11. Through the connection between the connecting rod 5 and the connecting pipe 21, under the action of the connecting rod 5, it is convenient to place and support the connecting cover 1 and the mold bag 2. And under the action of the connecting rod 5, it can support the use of the air charging pipe 3 and the grouting pipe 4.

[0026] Furthermore, the clamping rod 71 is in a cylindrical shape and is fittedly connected with the clamping groove 12. The clamping grooves 12 are distributed in two groups oppositely on both sides of the support rod 11. The abutting balls 14 are distributed in two groups on the opposite sides of the clamping groove 12, and the number of each group of abutting balls 14 is two. Through the connection between the support rod 11 and the clamping groove 12, under the connection of the cover plate 7 and the clamping rod 71, through the fitting connection between the clamping rod 71 and the clamping groove 12, the supporting effect of the cover plate 7 connected to the connecting cover 1 is realized.

[0027] Furthermore, the abutting ball 14 is elastically slidably connected with the inner groove of the clamping groove 12 through the support spring 13. The abutting ball 14 is in abutting contact with the clamping rod 71 through the support spring 13. Under the connection between the abutting ball 14 and the inner groove of the clamping groove 12, through the action of the abutting ball 14, the clamping and blocking effect of the clamping rod 71 in the clamping groove 12 is realized, and the connection support effect of the cover plate 7 on the connecting cover 1 is improved.

[0028] Working principle: When using the mold bag 2, under the action of the connecting rod 5, it is convenient to place and support the connecting cover 1. When the connecting cover 1 and the mold bag 2 are placed in the corresponding positions, the air pump and the grouting equipment are respectively connected to the air charging pipe 3 and the grouting pipe 4 to complete the air charging and grouting operations in the mold bag 2. At this time, affected by the change in the volume of the mold bag 2, the clamping rod 71 disengages from the clamping groove 12, the cover plate 7 and the connecting cover 1 are separated, and the connecting cover 1 continues to move with the mold bag 2. Because the outer surface of the connecting cover 1 is arc-shaped, the protection and movement guiding effects on the mold bag 2 are achieved. As the volume of the mold bag 2 changes, the support rod 11 is broken, that is, the grouting filling operation for a large karst cave is completed. By using the mold bag 2, the flow rate of the slurry can be controlled, the solidification of the slurry can be accelerated, and the performance and effect of grouting filling can be improved.

Claims

1. A large karst cave plugging and filling structure for a shield tunneling through a karst area, comprising a connecting cover and a mold bag, characterized in that: The surface of the connecting cover is fixedly connected with a support rod, the surface of the support rod is snap-connected with a cover plate, the surface of the cover plate is provided with a magnetic block, the surface of the cover plate adsorbs a protective cover through the magnetic block, the inner side of the connecting cover is provided with a formwork bag, one end of the formwork bag far away from the connecting cover is fixedly connected with a connecting pipe, the surface of the connecting pipe is connected to an air filling pipe and a grouting pipe through a passage, the outer surface of the connecting pipe is threadedly connected with a connecting rod, the surface of the support rod is provided with a card slot, the inner wall of the card slot is provided with a groove, and a support spring is fixedly connected to the inner side of the groove, and a resisting ball is fixedly connected to the surface of the support spring. The two sides of the cover plate are fixedly connected with clamping rods.

2. The large karst cave plugging and filling structure for shield tunneling through karst areas according to claim 1, characterized in that: The formwork bags are spirally distributed inside the connecting cover and the cover plate, and the cover plates are distributed in four groups on the surface of the connecting cover.

3. A large karst cave plugging and filling structure for shield tunneling through a karst area according to claim 1, characterized in that: The cover plate, the support rod and the protective cover form a cavity body with the connecting cover, and the connecting pipe penetrates through the surface of the protective cover and is connected to the formwork bag through a passage.

4. A large karst cave plugging and filling structure for shield tunneling through a karst area according to claim 1, characterized in that: There are folds in the distribution of the contact between the connecting pipe and the formwork bag, and the air filling pipe and the grouting pipe are connected to the formwork bag through the connecting pipe through a passage.

5. A large karst cave plugging and filling structure for shield tunneling through a karst area according to claim 1, characterized in that: The connecting rod is connected between the air filling pipe and the grouting pipe through the connecting pipe, the support rods are distributed in a long rod shape on the surface of the connecting cover, and the cover plate is connected to the connecting cover through the support rod.

6. A large karst cave plugging and filling structure for shield tunneling through a karst area according to claim 1, characterized in that: The clamping rod is in a cylindrical shape and is engaged with the card slot, the card slots are distributed in two groups on opposite sides of the support rod, the resisting balls are distributed in two groups on the opposite sides of the card slot, and the number of each group of resisting balls is two.

7. A large karst cave plugging and filling structure for shield tunneling through a karst area according to claim 1, characterized in that: The resisting ball is elastically slidably connected to the inner groove of the card slot through the support spring, and the resisting ball is in abutting contact with the clamping rod through the support spring.

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