Karst cave advanced filling device for karst pile foundation construction

Abstract

The utility model discloses a karst cave advance filling device for karst pile foundation construction, which comprises a punch hammer, an impact pipe, an elastic expansion sleeve and an elastic expansion pipe, the punch hammer is provided with an inner cavity and a hoisting end, the hoisting end is detachably connected with a punching machine through a steel cable, and one end of the punch hammer opposite to the hoisting end is an impact end; the impact pipe is arranged at the impact end and communicated with the inner cavity, when the impact hammer is hoisted, the impact pipe is vertically downward, and the outer diameter of the impact pipe is far smaller than the end face size of the impact end; the elastic expansion sleeve hermetically sleeves one end, far away from the punch hammer, of the impact tube; the elastic expansion pipe is arranged at the hoisting end and communicates with the inner cavity, and the elastic expansion pipe is used for filling the elastic expansion sleeve with the backfill material through the inner cavity so that the elastic expansion sleeve can expand and fill the karst cave. The problem that the stability of the karst cave cannot be guaranteed in the process of treating the karst cave at present can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of punching and pouring pile construction, in particular to a karst cave advance filling device used for karst pile foundation construction. Background Art

[0002] Karst areas often have many caves, underground rivers, etc. When carrying out engineering construction in the above-mentioned areas, it is necessary to avoid them as much as possible. When it is impossible to avoid them, it is necessary to take measures such as anti-seepage and filling to minimize the danger of subsequent construction. Therefore, the stability of the foundation and the collapse of the cave restrict the engineering safety and project progress.

[0003] During the construction of bored piles, if a cave is encountered and the thickness and strength of the upper covering layer of the cave do not meet the bearing capacity requirements, the pile body needs to penetrate the cave to meet the bearing capacity requirements of the pile foundation. In the process of hammering the pile hole to form the pile, the treatment of the cave is generally handled by following up with a casing or backfilling with stone flakes. However, these two measures are subsequent treatment methods for the cave, and neither can prevent the occurrence of cave collapse, and cannot ensure the stability of the cave during the treatment process. Utility Model Content

[0004] The utility model aims to provide a karst cave advance filling device for karst pile foundation construction, which can solve the current problem that the stability of the karst cave cannot be guaranteed during the process of treating the karst cave.

[0005] The utility model is realized by the following technical solutions:

[0006] A device for pre-filling a cave for karst pile foundation construction, comprising a hammer, wherein the hammer is provided with an inner cavity, the hammer is provided with a hoisting end, the hoisting end is detachably connected to a punching machine via a steel cable, and the end of the hammer opposite to the hoisting end is an impact end; an impact tube, wherein the impact tube is provided at the impact end and is connected to the inner cavity, and when the hammer is hoisted, the impact tube is vertically downward, and the outer diameter of the impact tube is much smaller than the end face size of the impact end; an elastic expansion sleeve, wherein the elastic expansion sleeve sealing sleeve is provided at one end of the impact tube away from the hammer; and an elastic expansion tube, wherein the elastic expansion tube is provided at the hoisting end and is connected to the inner cavity, and the elastic expansion tube is used to fill backfill material into the elastic expansion sleeve through the inner cavity, so that the elastic expansion sleeve expands and fills the cave.

[0007] Optionally, the hoisting end is provided with a diameter limiting tube, one end of the diameter limiting tube is connected to the inner cavity, and the other end of the diameter limiting tube is connected to the elastic expansion tube.

[0008] Optionally, the inner cavity is cylindrical; the diameter limiting tube, the inner cavity and the impact tube are coaxially arranged; the inner diameter of the diameter limiting tube, the diameter of the inner cavity and the inner diameter of the impact tube are all equal.

[0009] Optionally, the end of the elastic expansion tube is coaxially sleeved on the outside of the diameter limiting tube and is detachably connected to the diameter limiting tube via a first clamp; the elastic expansion sleeve is sleeved on the outside of the impact tube and is detachably connected to the impact tube via a second clamp.

[0010] Optionally, the hammer is in a truncated cone shape, the end of the hammer with a smaller radius is the hoisting end, and the end of the hammer with a larger radius is the impact end.

[0011] Optionally, the inner cavity is coaxially arranged with a center axis of the hammer.

[0012] Optionally, the outer diameter of the diameter-limiting tube is smaller than the diameter of the lifting end.

[0013] Optionally, the lifting end is provided with a plurality of connecting rods at evenly intervals around the diameter limiting tube, and the connecting rods are arranged parallel to the diameter limiting tube; the ends of all the connecting rods away from the lifting end are commonly connected to a lifting plate, so that a tube containing layer is formed between the lifting plate and the lifting end, and the end of the elastic expansion tube away from the hammer extends out from the tube containing layer; the lifting plate is coaxially arranged with the hammer; the middle part of the lifting plate is detachably connected to the punching machine through the steel cable.

[0014] Optionally, the layer height of the tube-containing layer is much greater than the length of the diameter-limiting tube; and the distance between two adjacent connecting rods is greater than the outer diameter of the elastic expansion tube.

[0015] Optionally, a slot is dug in the middle of the hoisting plate, and a block is detachably connected to the slot, and the block is connected to the steel cable.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] The utility model provides a device for pre-filling a cave for karst pile foundation construction. A hammer is provided, and an impact tube is provided at the bottom of the hammer. A punching machine is used to punch the hammer to a certain distance above the cave, and only the impact tube is punched into the cave. Since the outer diameter of the impact tube is much smaller than the end face size of the impact end, the hammer can form a structural support, stably supporting the stratum above the cave, and only the impact tube is allowed to enter the cave, thereby avoiding the situation where the hammer punches into the cave and causes the cave structure to be unstable; on this basis, an inner cavity and an elastic expansion tube are provided, so that the two are connected with the impact tube, and an elastic expansion sleeve is provided at the end of the impact tube, and the backfill material is continuously filled into the elastic expansion sleeve through the inner cavity by the elastic expansion tube, so that the elastic expansion sleeve gradually expands in the cave, thereby effectively filling and supporting the cave; through the mutual cooperation of the above-mentioned features, the device for pre-filling a cave for karst pile foundation construction can effectively solve the problem that the stability of the cave cannot be guaranteed in the process of treating the cave. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0019] Figure 1 A schematic diagram of a karst cave advance filling device for karst pile foundation construction provided by an embodiment of the utility model;

[0020] Figure 2 A partial enlarged schematic diagram of the A portion of the karst cave advance filling device for karst pile foundation construction provided by the embodiment of the utility model;

[0021] Figure 3 A schematic diagram of a karst cave advance filling device for karst pile foundation construction provided by an embodiment of the utility model during filling.

[0022] Marks and corresponding parts names in the attached drawings:

[0023] 10-hammer; 11-inner cavity; 12-lifting end; 13-steel cable; 14-impact end; 20-impact tube; 21-second clamp; 30-elastic expansion sleeve; 40-elastic expansion tube; 50-diameter limiting tube; 51-first clamp; 60-connecting rod; 61-lifting plate; 62-tube containing layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0025] Example

[0026] Please refer to Figures 1 to 3 The present embodiment provides a karst cave advance filling device for karst pile foundation construction, comprising a hammer 10, the hammer 10 is provided with an inner cavity 11, the hammer 10 is provided with a hoisting end 12, the hoisting end 12 is detachably connected to the punching machine through a steel cable 13, and the end of the hammer 10 opposite to the hoisting end 12 is an impact end 14; the second includes an impact tube 20, the impact tube 20 is provided at the impact end 14, and is connected to the inner cavity 11, when the hammer 10 is hoisted, the impact tube 20 is vertically Downward, the outer diameter of the impact tube 20 is much smaller than the end face size of the impact end 14; the third includes an elastic expansion sleeve 30, and the elastic expansion sleeve 30 is sealingly sleeved on the end of the impact tube 20 away from the hammer 10; the fourth includes an elastic expansion tube 40, and the elastic expansion tube 40 is arranged at the lifting end 12 and connected with the inner cavity 11. The elastic expansion tube 40 is used to fill the backfill material into the elastic expansion sleeve 30 through the inner cavity 11, so that the elastic expansion sleeve 30 expands and fills the cave.

[0027] The cave advance filling device for karst pile foundation construction provided in this embodiment is provided with a hammer 10, and an impact tube 20 is provided at the bottom thereof, and the hammer 10 is punched to a certain distance above the cave by a punching machine, so that only the impact tube 20 is punched into the cave. Since the outer diameter of the impact tube 20 is much smaller than the end face size of the impact end 14, the hammer 10 can form a structural support and stably support the stratum above the cave, and only the impact tube 20 is allowed to enter the cave, thereby avoiding the situation where the hammer 10 punches into the cave and causes the cave structure to be unstable; On this basis, by setting the inner cavity 11 and the elastic expansion tube 40, the two are connected with the impact tube 20, and the elastic expansion sleeve 30 is set at the end of the impact tube 20, and the elastic expansion tube 40 is used to continuously fill the backfill material into the elastic expansion sleeve 30 through the inner cavity 11, so that the elastic expansion sleeve 30 gradually expands in the cave, thereby effectively filling and supporting the cave; through the mutual cooperation of the above-mentioned features, the cave advance filling device used for karst pile foundation construction can effectively solve the current problem of being unable to ensure the stability of the cave in the process of treating the cave.

[0028] In order to prevent the end of the elastic expansion tube 40 connected to the inner cavity 11 from over-expanding and causing the filling material to get stuck and blocked, the lifting end 12 is provided with a diameter limiting tube 50, one end of which is connected to the inner cavity 11, and the other end is connected to the elastic expansion tube 40.

[0029] In order to ensure that the filling material flows smoothly into the elastic expansion sleeve 30, the inner cavity 11 is cylindrical; the limiting tube 50, the inner cavity 11 and the impact tube 20 are coaxially arranged; the inner diameter of the limiting tube 50, the diameter of the inner cavity 11 and the inner diameter of the impact tube 20 are all equal.

[0030] Preferably, in order to facilitate disassembly, assembly and replacement of the elastic expansion tube 40 and the elastic expansion sleeve 30 while ensuring the connection performance, the end of the elastic expansion tube 40 is coaxially sleeved on the outside of the diameter limiting tube 50, and is detachably connected to the diameter limiting tube 50 through a first clamp 51; the elastic expansion sleeve 30 is sleeved on the outside of the impact tube 20, and is detachably connected to the impact tube 20 through a second clamp 21.

[0031] Preferably, in order to ensure the impact effect of the hammer and maximize its bottom area, the hammer 10 is truncated cone-shaped, the end of the hammer 10 with a smaller radius is the hoisting end 12, and the end with a larger radius is the impact end 14.

[0032] Preferably, the inner cavity 11 is coaxially arranged with a center axis of the hammer 10 .

[0033] Preferably, the outer diameter of the diameter-limiting tube 50 is smaller than the diameter of the hanging end 12 .

[0034] In order to ensure the balance performance of the hammer 10 when hoisting, the hoisting end 12 is evenly spaced with a plurality of connecting rods 60 around the diameter limiting tube 50, and the connecting rods 60 are arranged parallel to the diameter limiting tube 50; the ends of all the connecting rods 60 away from the hoisting end 12 are commonly connected to a hoisting plate 61, so that a pipe containing layer 62 is formed between the hoisting plate 61 and the hoisting end 12, and the end of the elastic expansion tube 40 away from the hammer 10 extends out from the pipe containing layer 62; the hoisting plate 61 is coaxially arranged with the hammer 10; the middle part of the hoisting plate 61 is detachably connected to the punching machine through the steel cable 13.

[0035] Through the above arrangement, it is ensured that the hoisting point is located in the middle of the hoisting end 12 of the hammer 10, and the elastic expansion tube 40 is not hindered from being smoothly filled with backfill materials.

[0036] Preferably, the layer height of the tube-containing layer 62 is much greater than the length of the diameter-limiting tube 50 ; and the distance between two adjacent connecting rods 60 is greater than the outer diameter of the elastic expansion tube 40 .

[0037] In order to further explain the specific structure of the detachable connection between the lifting plate 61 and the steel cable 13, a slot (not shown) is dug in the middle of the lifting plate 61, and a block (not shown) is detachably connected to the slot, and the block is connected to the steel cable 13.

[0038] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A cave advance filling device for karst pile foundation construction, characterized in that: include: A hammer (10), wherein the hammer (10) is provided with an inner cavity (11), and the hammer (10) is provided with a hanging end (12), wherein the hanging end (12) is detachably connected to a punching machine via a steel cable (13), and an end of the hammer (10) opposite to the hanging end (12) is an impact end (14); an impact tube (20), the impact tube (20) being arranged at the impact end (14) and being in communication with the inner cavity (11); when the impact hammer (10) is hoisted, the impact tube (20) is vertically downward, and the outer diameter of the impact tube (20) is much smaller than the end face size of the impact end (14); An elastic expansion sleeve (30), the elastic expansion sleeve (30) being sealingly sleeved on an end of the impact tube (20) away from the impact hammer (10); An elastic expansion tube (40), the elastic expansion tube (40) is arranged at the lifting end (12) and is connected to the inner cavity (11), and the elastic expansion tube (40) is used to fill backfill material into the elastic expansion sleeve (30) through the inner cavity (11), so that the elastic expansion sleeve (30) expands and fills the cave.

2. The device for advanced filling of karst caves for karst pile foundation construction according to claim 1, characterized in that: The hoisting end (12) is provided with a diameter limiting tube (50), one end of the diameter limiting tube (50) is in communication with the inner cavity (11), and the other end of the diameter limiting tube (50) is in communication with the elastic expansion tube (40).

3. The device for advanced filling of karst caves for karst pile foundation construction according to claim 2, characterized in that: The inner cavity (11) is cylindrical; The diameter limiting tube (50), the inner cavity (11) and the impact tube (20) are coaxially arranged; The inner diameter of the diameter-limiting tube (50), the diameter of the inner cavity (11), and the inner diameter of the impact tube (20) are all equal.

4. The device for advanced filling of karst caves for karst pile foundation construction according to claim 3 is characterized in that: The end of the elastic expansion tube (40) is coaxially sleeved on the outer side of the diameter limiting tube (50), and is detachably connected to the diameter limiting tube (50) via a first clamp (51); The elastic expansion sleeve (30) is sleeved on the outer side of the impact tube (20) and is detachably connected to the impact tube (20) via a second clamp (21).

5. The device for advanced filling of karst caves for karst pile foundation construction according to claim 3, characterized in that: The hammer (10) is in the shape of a truncated cone; the end of the hammer (10) with a smaller radius is the hoisting end (12), and the end with a larger radius is the impact end (14).

6. The device for advanced filling of karst caves for karst pile foundation construction according to claim 5, characterized in that: The inner cavity (11) is coaxially arranged with the center axis of the hammer (10).

7. The device for advanced filling of karst caves for karst pile foundation construction according to claim 6, characterized in that: The outer diameter of the diameter-limiting tube (50) is smaller than the diameter of the hanging end (12).

8. The device for advanced filling of karst caves for karst pile foundation construction according to claim 7, characterized in that: The hoisting end (12) is evenly spaced with a plurality of connecting rods (60) around the diameter limiting tube (50), and the connecting rods (60) are arranged in parallel with the diameter limiting tube (50); One end of all the connecting rods (60) away from the lifting end (12) is commonly connected to a lifting plate (61), so that a pipe-containing layer (62) is formed between the lifting plate (61) and the lifting end (12), and one end of the elastic expansion tube (40) away from the hammer (10) extends out from the pipe-containing layer (62); The hoisting plate (61) is coaxially arranged with the punch (10); The middle part of the hoisting plate (61) is detachably connected to the punching machine via the steel cable (13).

9. The device for advanced filling of karst caves for karst pile foundation construction according to claim 8, characterized in that: The layer height of the tube-containing layer (62) is much greater than the length of the diameter-limiting tube (50); The distance between two adjacent connecting rods (60) is greater than the outer diameter of the elastic expansion tube (40).

10. The device for advanced filling of karst caves for karst pile foundation construction according to claim 8, characterized in that: A clamping groove is excavated in the middle of the hoisting plate (61), and a clamping block is detachably clamped in the clamping groove, and the clamping block is connected to the steel cable (13).

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