Concrete pouring device applied to bead-like karst cave

Abstract

The utility model provides a concrete pouring device applied to a bead-like karst cave, and particularly relates to the technical field of engineering construction. The device comprises a protective sleeve, a drill bit and a grouting pipe, a plurality of grouting assemblies are arranged on the surface of the protective sleeve according to the exploration position of the actual bead-like karst cave; two discharging through holes are symmetrically formed in the positions, corresponding to the grouting assemblies, of the surface of the protection sleeve in the diameter direction, one end of the grouting pipe is connected with a concrete pump, and the other end of the grouting pipe extends into an inner cavity of the protection sleeve and completes concrete grouting of the bead-string-shaped karst cave through the multiple discharging through holes. According to the utility model, the grouting assembly and the discharging through hole are arranged according to the exploration position of the actual bead-shaped karst cave, so that the karst caves at different positions can be filled; compared with a traditional pouring method, the problem that multiple times of punching and multiple times of casing pipe burying are needed when the bead-shaped karst cave is poured is solved, the construction cost is effectively reduced, and meanwhile the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering construction, and particularly relates to a concrete pouring device applied to beaded karst caves. Background Technique

[0002] Karst strata are widely distributed in China. With the development of the economy, the demand for construction in karst areas is also increasing. However, in areas where karst development in the strata is relatively strong, there are many solution (soil) caves and many beaded karst caves in the strata. Usually, the common treatment methods for this kind of geology include rock-socketed pile foundations, composite foundations, etc.

[0003] Generally, for the construction of rock-socketed piles, it is required that there is a certain thickness of intact rock layer below the pile tip, that is, the karst cave roof has a certain thickness. When the thickness of the karst cave roof is insufficient, the current solutions are to penetrate the karst cave or carry out karst cave backfilling treatment. However, these two solutions are not a big problem for a single karst cave. If beaded karst caves are encountered, the following problems exist: (1) Penetrating beaded karst caves requires penetrating multiple hard rock layers, which requires high construction equipment and has a great impact on construction efficiency, increasing construction costs and the construction period; (2) When carrying out karst cave backfilling treatment, beaded karst caves need to be opened multiple times and casing pipes need to be buried multiple times, which consumes a large amount of both the construction period and cost.

[0004] Therefore, in order to solve the above problems, the utility model proposes a concrete pouring device applied to beaded karst caves to achieve the purpose of reducing costs and increasing efficiency. Content of the Utility Model

[0005] To overcome the deficiencies of the above-mentioned prior art and solve the problems that the existing pouring methods for beaded karst caves are often restricted by geological conditions and require multiple hole openings and multiple casing pipe burials. The utility model provides a concrete pouring device applied to beaded karst caves, and the specific technical solutions are as follows:

[0006] A concrete pouring device applied to beaded karst caves includes a protective casing, a drill bit, and a grouting pipe; the drill bit is installed at the bottom of the protective casing; several grouting components are arranged on the surface of the protective casing according to the exploration positions of actual beaded karst caves; two discharge through holes are symmetrically opened in the diameter direction at the positions corresponding to each grouting component on the surface of the protective casing, and arc-shaped reinforcement steel plates are welded to the inner walls of the protective casing on the left and right sides of the two discharge through holes; one end of the grouting pipe is connected to a concrete pump, and the other end extends into the inner cavity of the protective casing and completes the concrete pouring of beaded karst caves through several discharge through holes.

[0007] The height of the arc-shaped reinforcement steel plate is greater than the height of the discharge through hole; the width of the arc-shaped reinforcement steel plate is equal to the arc length of the inner walls of the protective casing on the left and right sides of the two discharge through holes on the same horizontal plane.

[0008] The size of the discharge through-hole is set according to the size of the aggregate of the concrete.

[0009] The grouting assembly includes a leather sleeve and at least four tightening devices; the leather sleeve is sleeved on the surface of the protective casing corresponding to the position of the discharge through-hole; the tightening device is of a semi-circular structure, and bolt connection holes are provided at both ends of the tightening device; every two tightening devices form a group and are connected end to end by fixing bolts to form a ring, and are respectively wrapped on the upper and lower sides of the leather sleeve to clamp and fix the leather sleeve and the surface of the protective casing.

[0010] The height of the leather sleeve is greater than the height of the arc-shaped reinforcement steel plate.

[0011] A ring-shaped sealing capsule is placed between the protective casing and the grouting pipe, close to the top of the protective casing.

[0012] The ring-shaped sealing capsule is filled with air or liquid.

[0013] The outer diameter of the grouting pipe is smaller than the inner diameter of the protective casing; the outer diameter of the drill bit is greater than the outer diameter of the tightening device.

[0014] The leather sleeve is made of an elastic plastic material.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The present utility model sets the grouting assembly and the discharge through-hole according to the exploration position of the actual beaded karst cave, and can well fill and treat the karst caves at different positions; compared with the traditional grouting method, it solves the problems of multiple drilling and multiple casing embedding during the grouting of beaded karst caves, effectively reducing the construction cost and shortening the construction period at the same time. Description of the Drawings

[0017] The specification drawings constituting the present application are used to provide a further understanding of the present application and do not constitute an improper limitation of the present application.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 For Figure 1 The side view of the grouting assembly in

[0020] Figure 3 It is a schematic diagram of the structure of the protective casing;

[0021] Figure 4 It is the top view and side view of the tightening device;

[0022] In the figure, 1 - protective casing; 11 - discharge through-hole; 2 - drill bit; 3 - grouting pipe; 4 - arc-shaped reinforcement steel plate; 5 - leather sleeve; 6 - tightening device; 61 - fixing bolt; 7 - ring-shaped sealing capsule. Detailed implementation manners

[0023] The detailed implementation manners of a concrete pouring device for beaded karsts provided by the present utility model will be further described in conjunction with the accompanying drawings and embodiments.

[0024] As Figure 1-2 shown, a concrete pouring device for beaded karsts includes a protective casing 1, a drill bit 2 and a grouting pipe 3. Among them, the drill bit 2 is installed on the outer wall of the bottom of the protective casing 1; a plurality of grouting components are correspondingly arranged on the surface of the protective casing 1 according to the actual exploration positions of the beaded karsts; two discharge through holes 11 are symmetrically opened in the diameter direction at the positions corresponding to each grouting component on the surface of the protective casing 1, and arc-shaped reinforcing steel plates 4 are welded on the inner walls of the protective casing 1 on the left and right sides of the two discharge through holes 11, that is, the width of the arc-shaped reinforcing steel plate 4 can completely cover the inner wall of the protective casing 1 at the unopened part on both sides of the discharge through hole 11, and the height of the arc-shaped reinforcing steel plate 4 is greater than the height of the discharge through hole 11. Such a design can effectively prevent the fracture and damage of the protective casing 1 during the drilling process, as Figure 3 shown;

[0025] The outer diameter of the grouting pipe 3 is smaller than the inner diameter of the protective casing 1, and one end of the grouting pipe 3 is connected to the concrete pump of the pouring equipment, and the other end extends into the inner cavity of the protective casing 1 and completes the concrete pouring of the beaded karsts through a plurality of discharge through holes 11.

[0026] Preferably, the size of the discharge through hole 11 can be set according to the size of the concrete aggregate to ensure the smooth progress of the pouring.

[0027] More preferably, the grouting component includes a leather sleeve 5 and at least four tightening devices 6. The leather sleeve 5 is sleeved on the surface of the protective casing 1 corresponding to the discharge through hole 11 and is made of an elastic plastic material so that it can fit well on the surface of the protective casing; of course, the height of the leather sleeve 5 and the number of tightening devices 6 can be appropriately adjusted according to the size of the discharge through hole 11 to ensure the clamping and fixing of the leather sleeve 5 on the surface of the protective casing 1;

[0028] The tightening device 6 is of a semi-circular structure, and bolt connection holes are provided at both ends of the tightening device 6, as Figure 4As shown in the figure; every two tightening devices 6 are connected end to end in sequence by fixing bolts 61 to form a ring, and are respectively wrapped around the upper and lower sides of the leather sleeve 5. On the one hand, the setting of the tightening device 6 can clamp and fix the leather sleeve 5 to the surface of the protection casing 1; on the other hand, it can effectively prevent the leather sleeve 5 from being damaged by friction during the process of lowering the drill. It should be noted here that the setting of the leather sleeve 5 can effectively prevent the loss of the circulating fluid during the process of lowering the drill pipe, and at the same time, it can also avoid the problem that the inside of the protection casing 1 is blocked due to cave collapse after the drilling is completed, resulting in the inability to pour concrete.

[0029] Further preferably, in order to ensure that there is enough space on the surface of the leather sleeve 5 and the protection casing 1 for the installation of the tightening device 6, so that the upper and lower groups of tightening devices 6 can be respectively located above and below the discharge through hole 11, and thus will not cover the area where the discharge through hole 11 is located, the height of the leather sleeve 5 should be greater than the height of the arc-shaped reinforcement steel plate 4.

[0030] Even further preferably, a ring-shaped sealing capsule 7 is placed between the protection casing 1 and the grouting pipe 3, near the top of the protection casing 1, which can effectively prevent the slurry from flowing out between the protection casing 1 and the grouting pipe 3 during the perfusion process and affecting the pouring quality. Preferably, the ring-shaped sealing capsule 7 can be filled with substances such as air or liquid.

[0031] Even more preferably, in order to avoid damage to the tightening device 6 during the process of lowering the drill, the outer diameter of the drill bit 2 should be greater than the outer diameter of the tightening device 6.

[0032] During use, it specifically includes the following steps:

[0033] First, explore and record the positions of each karst cave in the actual beaded karst cave, and respectively open discharge through holes on the protection casing at the corresponding karst cave positions according to the exploration results and install the grouting components;

[0034] Second, install the drill bit at the bottom of the protection casing and complete the work of lowering the drill;

[0035] Third, connect one end of the grouting pipe to the concrete pump in the perfusion equipment, and the other end extends into the inner cavity of the protection casing and moves upward along the inner cavity of the protection casing to start perfusion;

[0036] Finally, as the perfusion work progresses, every time it reaches a karst cave, the pressure of the concrete slurry will break through the leather sleeve at the corresponding position of the discharge through hole, thereby completing the perfusion of the corresponding karst cave. Then, lift the grouting pipe upward to the next karst cave and repeat the previous method to finally complete the perfusion work of all the karst caves in the beaded karst cave.

[0037] The utility model sets the grouting assembly and the discharge through hole according to the exploration position of the actual bead-shaped karst cave, and can well fill and treat the karst caves at different positions. Compared with the traditional perfusion method, the problems of punching and casing embedding for multiple times during the perfusion of the bead-shaped karst cave are solved, the construction cost is effectively reduced, and the construction period is shortened at the same time.

[0038] In the utility model, terms such as "upper", "lower", "bottom", "top", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. They are only relationship words determined for the convenience of describing the structural relationship of each component or element of the utility model, and do not specifically refer to the components or elements of the utility model, and should not be construed as a limitation of the utility model. Terms such as "connected" and "joined" should be understood in a broad sense, indicating that they can be fixedly connected, integrally connected or detachably connected; they can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the utility model can be determined according to specific circumstances, and should not be construed as a limitation of the utility model.

[0039] Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the utility model should also fall within the protection scope of the utility model.

Claims

1. A concrete pouring device for beaded caves, characterized in that: It includes a protective casing, a drill bit and a grouting pipe; the drill bit is installed at the bottom of the protective casing; The surface of the protective casing is provided with a plurality of grouting components according to the actual exploration position of the beaded cave; The protective sleeve surface is provided with two discharge holes symmetrically along the diameter direction corresponding to the position of each grouting assembly, and arc-shaped reinforcement steel plates are welded to the inner walls of the protective sleeve on the left and right sides of the two discharge holes; One end of the grouting pipe is connected to a concrete pump, and the other end extends into the inner cavity of the protective sleeve and completes the concrete pouring of the beaded cave through a plurality of discharge holes.

2. The concrete pouring device for beaded caves according to claim 1, characterized in that: The height of the arc-shaped reinforcement steel plate is greater than the height of the discharge through hole; the width of the arc-shaped reinforcement steel plate is equal to the arc length of the inner walls of the protective sleeves on the left and right sides of the two discharge through holes on the same horizontal plane.

3. The concrete pouring device for beaded caves according to claim 2, characterized in that: The size of the discharge through hole is set according to the size of the aggregate of the concrete.

4. The concrete pouring device for beaded caves according to claim 1, characterized in that: The grouting assembly comprises a leather sleeve and at least four clamping devices; the leather sleeve is sleeved on the surface of the protective sleeve corresponding to the position of the discharge through hole; the clamping device is a semicircular structure, and both ends of the clamping device are provided with bolt connection holes; Each two clamping devices form a group and are connected end to end by fixing bolts to form a ring shape, which is respectively wrapped around the upper and lower sides of the leather cover so that the leather cover is clamped and fixed to the surface of the protective sleeve.

5. The concrete pouring device for beaded caves according to claim 4, characterized in that: The height of the leather case is greater than the height of the arc-shaped reinforcement steel plate.

6. The concrete pouring device for beaded caves according to claim 1, characterized in that: An annular sealing bag is placed between the protective sleeve and the grouting pipe and near the top of the protective sleeve.

7. The concrete pouring device for beaded caves according to claim 6, characterized in that: The annular sealing bag is filled with air or liquid.

8. The concrete pouring device for beaded caves according to claim 4, characterized in that: The outer diameter of the grouting pipe is smaller than the inner diameter of the protective casing; The outer diameter of the drill bit is greater than the outer diameter of the clamping device.

9. The concrete pouring device for beaded caves according to claim 4, characterized in that: The leather case is made of elastic plastic material.

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