Reinforcement cage with pile hole karst cave plugging function

Abstract

A reinforcement cage with a pile hole karst cave blocking function comprises a reinforcement cage body and a blocking sleeve arranged on the reinforcement cage body in a sleeving mode, a limiting assembly is arranged between the blocking sleeve and the reinforcement cage body and comprises a lower inserting hole penetrating through the bottom of the blocking sleeve in the radial direction, and a supporting pin shaft is arranged in the lower inserting hole in a sleeved mode. The supporting pin shafts are supported on tension bands of the reinforcement cage body, upper insertion holes penetrating through the reinforcement cage body in the radial direction are formed above the lower insertion holes, the limiting pin shafts are arranged in the upper insertion holes in a sleeved mode, and the distance between the limiting pin shafts and the supporting pin shafts is matched with the distance between every two adjacent tension bands in the reinforcement cage body. After the reinforcement cage is placed in the pile hole, the plugging barrel correspondingly plugs the intersection of the pile hole and the karst cave, the pile hole and the karst cave are plugged and isolated, concrete injected into the pile hole subsequently cannot enter the karst cave from the pile hole, normal pouring operation of the pile hole is achieved, the karst cave does not need to be filled with cement mortar, the material cost is saved, and the construction efficiency is improved. The construction progress is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a steel cage with the function of sealing pile hole karst caves. Background Technology

[0002] Underground karst caves are underground cavities formed by the long-term dissolution of soluble rocks such as limestone by groundwater. The formation of karst caves is mainly related to hydrogeological conditions and the solubility properties of the rocks. During its flow, groundwater comes into contact with soluble rocks, dissolving the solutes within and carrying them away. This process is called dissolution. When the rate of solute dissolution exceeds the flow rate of the groundwater, a karst cave is formed. Karst caves have a significant impact on engineering construction, potentially causing cracks, tilting, or even collapse of buildings. Encountering karst caves in engineering construction usually occurs during the foundation piling process. Currently, the common approach is to inject cement mortar into the karst cave through the pile holes to fill the karst fissures and backfill the cavities. Only after the karst cave is filled can subsequent pile hole grouting work proceed. This method requires injecting a large amount of cement mortar to fill the karst cave, significantly increasing material costs. Furthermore, the injection of cement mortar into the karst cave needs to be done in a multi-gradient, gradual manner, which can delay the construction schedule and requires improvement. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a reinforcing cage with the function of sealing karst caves in pile holes.

[0004] The technical solution of this utility model is: a reinforcing cage with the function of sealing pile hole karst caves, including a reinforcing cage body and a sealing sleeve coaxially fitted on the reinforcing cage body. The sealing sleeve can slide freely on the reinforcing cage body. A limiting component is provided between the sealing sleeve and the reinforcing cage body. The limiting component includes a lower insertion hole that penetrates the bottom of the sealing sleeve radially. A supporting pin is fitted into the lower insertion hole. Hoops are evenly distributed on the reinforcing cage. The supporting pin is supported on the hoops of the reinforcing cage body. An upper insertion hole that penetrates the reinforcing cage body radially is provided above the lower insertion hole. The upper insertion hole and the lower insertion hole are arranged alternately. A limiting pin is fitted into the upper insertion hole. The limiting pin and the supporting pin are arranged alternately vertically. The distance between the limiting pin and the supporting pin matches the distance between two adjacent hoops in the reinforcing cage body.

[0005] Preferably, the supporting pins and limiting pins are arranged in a cross shape, and the diameters of the supporting pins and limiting pins are minimized to ensure the strength of the limiting support.

[0006] Preferably, the limiting pin and the supporting pin are of the same size, and the outer ends of the limiting pin and the supporting pin extend out of the outer side of the steel cage body. A limiting hole is provided at the outer end of the limiting pin and the supporting pin, and a pin supporting the outer side of the sealing sleeve is inserted into the limiting hole. Alternatively, the outer end of the limiting pin and the supporting pin is provided with threads, and the limiting is achieved by installing a nut on the threaded section.

[0007] Preferably, the sealing sleeve includes several sealing cylinders of the same size, which are coaxially connected vertically. The limiting component is set on the lowermost sealing cylinder, or the limiting component can be set on the upper sealing cylinder.

[0008] Preferably, the sealing cylinder has an annular boss at one end and an annular groove at the other end that can fit into the annular boss, the size of the annular groove being slightly larger than the size of the annular boss.

[0009] Preferably, the annular boss and the annular groove are provided with matching threads, or the annular boss and the annular groove are set to have a certain taper, and the taper of the annular groove is greater than the taper of the annular boss.

[0010] Preferably, the sealing sleeve is a steel cylinder, and the thickness of the steel cylinder is set according to the size of the detected karst cave to save costs. The outer diameter of the sealing sleeve is close to the inner diameter of the pile hole and can move up and down inside the pile hole.

[0011] The beneficial technical effects of this utility model are:

[0012] (1) After the steel cage is placed into the pile hole, the sealing cylinder is sealed at the intersection of the pile hole and the karst cave, thus sealing and isolating the pile hole and the karst cave. The concrete injected into the pile hole later will not enter the karst cave from the pile hole, thus realizing the normal grouting operation of the pile hole. It is not necessary to fill the karst cave with cement mortar, which helps to save material costs and improve the construction progress.

[0013] (2) The sealing sleeve adopts a connection structure of multiple small-sized sealing cylinders and connects them to the steel cage through a limiting component to ensure the stability and firmness of the sealing cylinder during the lowering of the steel cage. The number of sealing cylinders can be adjusted to adapt to different sizes of karst caves, which has the advantages of flexible and convenient construction process. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the utility model in use;

[0015] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 3 yes Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0017] Figure 4 yes Figure 3 Schematic diagram of the BB-direction cross-section structure;

[0018] Figure 5 This is one of the schematic diagrams of the three-dimensional structure of the sealing cylinder;

[0019] Figure 6 This is the second schematic diagram of the three-dimensional structure of the sealing cylinder.

[0020] In the figure, 1. Reinforcing cage body, 11. Hoop, 21. Support pin, 22. Lower insertion hole, 23. Limiting pin, 24. Upper insertion hole, 25. Limiting hole, 26. Pin, 3. Sealing cylinder, 31. Annular boss, 32. Annular groove, 4. Karst cave, 5. Pile hole. Detailed Implementation

[0021] Example 1, see appendix Figure 1-3 A reinforcing cage with the function of sealing karst caves in pile holes includes a reinforcing cage body 1 and a sealing sleeve coaxially fitted onto the reinforcing cage body. A limiting component is provided between the sealing sleeve and the reinforcing cage body 1. The limiting component includes a lower insertion hole 22 that radially penetrates the bottom of the sealing sleeve. A support pin 21 is fitted into the lower insertion hole. The support pin 21 is supported on a hoop 11 of the reinforcing cage body 1. The hoop 11 axially supports the sealing sleeve at the lower part through the support pin 21, thereby... The sleeve is fixed in the predetermined position, and an upper insertion hole 24 is provided above the lower insertion hole 22, through which the steel cage body 1 passes radially. A limiting pin 23 is inserted into the upper insertion hole 24, and the limiting pin 23 is pressed down on the upper part by the hoop 11. Under the downward support and upward pressure of the limiting pin 23 and the supporting pin 21, the sealing sleeve is fixed in the predetermined position. The distance between the limiting pin 23 and the supporting pin 21 matches the distance between two adjacent hoop 11 in the steel cage body 1.

[0022] The supporting pin 21 and the limiting pin 23 are arranged in a cross shape. The cross structure can help reinforce the sealing sleeve, improve the support strength of the sealing sleeve, and prevent the sealing sleeve from deforming under pressure.

[0023] The limiting pin 23 and the supporting pin 21 are the same size. Both the limiting pin 23 and the supporting pin 21 are provided with limiting holes 25 at their outer ends. A pin 26 is inserted into the limiting hole 25 and supported on the outer side of the sealing sleeve. The pin 26 can quickly fix the limiting pin 23 and the supporting pin 21 to prevent them from slipping axially and ensure the limiting support effect of the limiting component between the steel cage and the sealing sleeve.

[0024] The sealing sleeve is a steel cylinder. The outer diameter of the sealing sleeve is close to the inner diameter of the pile hole 5 and can move up and down inside the pile hole 5. After the steel cage is lowered into the pile hole 5, a small gap is formed between the sealing sleeve and the side wall of the pile hole 5, which can prevent concrete from seeping out from the gap.

[0025] In this embodiment, the reinforcing cage with the function of sealing the pile hole 5 and the karst cave 4 is used by hoisting the reinforcing cage into the pile hole 5. After the reinforcing cage is hoisted into place, the sealing cylinder 3 is correspondingly sealed at the intersection of the pile hole 5 and the karst cave 4, separating the pile hole 5 and the karst cave 4. An independent columnar space is formed inside the pile hole 5. Then, when the concrete is injected into the pile hole 5, it will not seep into the karst cave 4 due to the blocking effect of the sealing cylinder 3, so as to realize the normal grouting operation of the pile hole 5. The grouting process of the pile hole 5 does not require filling the karst cave 4 with cement mortar, which helps to save material costs and improve the construction progress.

[0026] It should be noted that the steel cage with the function of sealing pile holes 5 and karst caves 4 is mainly suitable for medium or small karst caves 4. When encountering large karst caves 4, the construction plan needs to be modified.

[0027] Example 2, see appendix Figure 4-6 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that the sealing sleeve includes several sealing cylinders 3 of the same size. The several sealing cylinders 3 are connected vertically. The limiting component is set on the bottom sealing cylinder 3. One end of the sealing cylinder 3 is provided with an annular boss, and the other end is provided with an annular groove 32 that can be matched and fitted into the annular boss. The sealing cylinders 3 are connected end to end through the annular boss and the annular groove 32. The number of sealing cylinders 3 connected can be adjusted to adapt to different sizes of karst caves 4, which has the advantages of flexible and convenient construction process.

[0028] The annular boss and the annular groove 32 are provided with matching threads, or the annular boss and the annular groove 32 are set with a certain taper. The taper between the annular boss and the annular groove 32 can form a closed structure. The threads can fix the two together as one, so as to avoid the phenomenon of slippage and misalignment caused by friction between the sealing cylinder 3 and the inner wall of the pile hole 5 during the lowering of the steel cage, and ensure the sealing effect.

Claims

1. A reinforced steel cage with the function of sealing karst caves in pile holes, characterized in that: The device includes a reinforcing cage body and a sealing sleeve coaxially fitted onto the reinforcing cage body. A limiting component is provided between the sealing sleeve and the reinforcing cage body. The limiting component includes a lower insertion hole that radially penetrates the bottom of the sealing sleeve, and a support pin is fitted into the lower insertion hole. The support pin is supported on the hoop of the reinforcing cage body. Above the lower insertion hole, there is an upper insertion hole that radially penetrates the reinforcing cage body, and a limiting pin is fitted into the upper insertion hole. The distance between the limiting pin and the support pin matches the distance between two adjacent hoops in the reinforcing cage body.

2. A reinforcing cage with the function of sealing karst caves in pile holes according to claim 1, characterized in that: The supporting pins and limiting pins are arranged in a cross shape.

3. A reinforcing cage with the function of sealing karst caves in pile holes according to claim 1, characterized in that: The limiting pin and the supporting pin are the same size. Both the limiting pin and the supporting pin have limiting holes at their outer ends, and pins that support the outer side of the sealing sleeve are inserted into the limiting holes.

4. A reinforcing cage with the function of sealing karst caves in pile holes according to claim 1, characterized in that: The sealing sleeve includes several sealing cylinders of the same size, which are connected vertically, and a limiting component is set on the bottom sealing cylinder.

5. A reinforcing cage with pile hole karst cave sealing function according to claim 4, characterized in that: The sealing cylinder has an annular boss at one end and an annular groove at the other end that can be fitted into the annular boss.

6. A reinforcing cage with pile hole karst cave sealing function according to claim 5, characterized in that: The annular boss and the annular groove are provided with matching threads, or the annular boss and the annular groove are set to have a certain taper.

7. A reinforcing cage with pile hole karst cave sealing function according to claim 1, characterized in that: The sealing sleeve is a steel cylinder, and its outer diameter is close to the inner diameter of the pile hole, allowing it to move up and down within the pile hole.

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