Static pile head concrete breaking device

Abstract

This application provides a static demolition device for pile head concrete, relating to the field of bored pile technology. It includes a central pipe and multiple horizontal pipes. The bottom end of the central pipe is inserted into the pile body and connected to one end of each of the horizontal pipes. The other ends of each horizontal pipe extend outward from the central pipe to the outside of the pile body. Each horizontal pipe contains a pile-breaking component, and each horizontal pipe has a horizontally oriented clearance hole. One side of the pile-breaking component can pass through the clearance hole and abut against the pile body, while the other side of the pile-breaking component forms a filling space between itself and the inner wall of the horizontal pipe for filling with an expansion agent. This application can effectively demolish the entire pile head portion of a bored pile that exceeds the design elevation.

Description

Technical Field

[0001] This application relates to the field of bored pile technology, and in particular to a static demolition device for pile head concrete. Background Technology

[0002] During the concrete pouring process of existing bored piles, impurities such as mud inevitably get mixed into the pile near the borehole opening, making it difficult to guarantee the strength of the pile head. Therefore, during the construction of bored piles, the actual elevation of the pile head needs to exceed the design elevation, and a static breaking device is used to remove the pile head that exceeds the design elevation.

[0003] Existing static demolition devices generally include a ring-shaped pre-embedded pipe and a riser. The ring-shaped pre-embedded pipe is sleeved outside the steel cage corresponding to the pile head, and the bottom end of the riser is connected to the ring-shaped pre-embedded pipe, so that after the bored pile is formed, the user can inject an expansion agent from the top of the riser into the ring-shaped pre-embedded pipe, and then the expansion agent will burst the pile head part that exceeds the design elevation.

[0004] However, because the ring-shaped pre-embedded pipe will form a ring-shaped split line around the reinforcing cage on the pile body of the bored cast-in-place pile after expansion, it is impossible to break the part of the bored cast-in-place pile located inside the reinforcing cage. As a result, the existing static breaking device cannot break the entire pile head part that exceeds the design elevation.

[0005] Therefore, there is a need to provide a static demolition device for pile head concrete. Utility Model Content

[0006] To address the problem that existing static demolition devices cannot demolish the entire pile head portion exceeding the design elevation, this application provides a static demolition device for pile head concrete.

[0007] This application provides a static demolition device for pile head concrete, which adopts the following technical solution: it includes a central pipe and multiple horizontal pipes. The bottom end of the central pipe is inserted into the pile body and connected to one end of the multiple horizontal pipes. The other ends of the multiple horizontal pipes extend outward from the central pipe to the outside of the pile body. Each horizontal pipe is provided with a pile breaking component, and each horizontal pipe has a clearance hole opened in the horizontal direction. One side of the pile breaking component can pass through the clearance hole and abut against the pile body. The other side of the pile breaking component forms a filling space between itself and the inner wall of the horizontal pipe for filling with an expansion agent.

[0008] By adopting the above technical solution, the bottom end of the central tube is inserted into the pile body and connected to multiple horizontal tubes. A space for filling with an expanding agent is formed between the pile-breaking component inside the horizontal tube and the inner wall of the horizontal tube. This allows the user to inject an expanding agent, such as a static blasting agent, into each filling space from the top of the central tube. When this expanding agent expands, it pushes each pile-breaking component through the clearance hole, squeezing the pile body and thus breaking off the portion of the pile head exceeding the design elevation from the pile body. Existing static breaking devices can only rely on a ring-shaped pre-embedded pipe to form a ring-shaped split line around the reinforcing cage on the pile body, and cannot break off the portion inside the reinforcing cage. In contrast, this device can effectively break off the entire pile head, solving the problem that existing devices cannot completely break off the portion of the pile head exceeding the design elevation.

[0009] Specifically, each of the horizontal pipes has a clearance hole on both sides of the pipe body along the horizontal direction, and each of the horizontal pipes has two pile-breaking components inside. A groove is formed on the inner bottom wall of the horizontal pipe along the passage direction of the clearance hole. The two pile-breaking components in each horizontal pipe are inserted into the groove and form the filling space between the two pile-breaking components. The pile-breaking component corresponds to the clearance hole one by one, and one side of each pile-breaking component can pass through the corresponding clearance hole along the groove and abut against the pile body.

[0010] By adopting the above technical solution, clearance holes are opened on both sides of the horizontal pipe and two pile-breaking components are set, so that the piles on both sides of the horizontal pipe can be squeezed by the pile-breaking components at the same time; the pile-breaking components are inserted into the sliding groove to ensure that the pile-breaking components move smoothly in the horizontal direction and accurately pass through the clearance holes to abut against the piles; a filling space is formed between the two pile-breaking components, which facilitates the filling of expansion agent to push the pile-breaking components, thereby improving the efficiency and effect of breaking the pile head part that exceeds the design elevation and better breaking the entire pile head part.

[0011] Furthermore, each of the aforementioned pile-breaking components has an arc-shaped surface formed on one side located within the filling space.

[0012] By adopting the above technical solution, the pile breaking component forms an arc-shaped surface on one side of the filling space, which increases the contact area with the expansion agent, making the force exerted by the expansion agent on the pile breaking component more uniform. This allows the pile breaking component to be pushed through the relief hole and abut against the pile body more effectively, thus enhancing the effect of breaking the pile head concrete.

[0013] Furthermore, the clearance hole is inclined from top to bottom in a direction away from the central axis of the horizontal tube, and a guide surface is formed on the side of each pile breaking component away from the clearance hole. When the top of the pile breaking component passes through the clearance hole, the expansion agent in the horizontal tube can pass through the clearance hole and leave the clearance hole upward along the gap between the guide surface and the outer wall of the horizontal tube.

[0014] By adopting the above technical solution, when the expansive agent pushes the top of the pile breaking component out of the clearance hole, the pile breaking component has already penetrated into the surrounding concrete to a certain extent, creating a certain gap between the pile head and the pile body to be broken. At this time, the setting of the guide surface and the inclined clearance hole allows the expansive agent to push the pile breaking component out of the horizontal pipe while simultaneously moving upward along the gap between the guide surface and the outer wall of the horizontal pipe, leaving the clearance hole and pushing upward against the concrete above the horizontal pipe. This causes the gap between the pile head and the pile body to be broken to expand rapidly, improving the efficiency and effectiveness of pile head breaking.

[0015] Specifically, it also includes multiple sealing caps, each of which corresponds to a horizontal pipe. Each sealing cap is detachably connected to the end of the corresponding horizontal pipe away from the central pipe and can seal the horizontal pipe.

[0016] By adopting the above technical solution, users can prevent concrete from entering the horizontal pipe by installing a sealing cap during concrete pouring. Alternatively, after the bored pile is formed and the expanding agent is poured into the filling space from the central pipe, the sealing cap can be removed to allow the air in the filling space to escape from the end of the horizontal pipe away from the central pipe. Finally, after the expanding agent flows out from the end of the horizontal pipe away from the central pipe, the sealing cap is installed again and the top opening of the central pipe is sealed with a sealing device such as a plug to achieve a seal for the filling space.

[0017] Furthermore, each of the horizontal tubes has a fixing screw hole, and each of the sealing caps has a connection hole. The sealing cap can be fitted onto the end of the corresponding horizontal tube away from the central tube, and is connected to the horizontal tube by a bolt passing through the connection hole and the corresponding fixing screw hole of the sealing cap.

[0018] By adopting the above technical solution, users can connect the sealing cap and the horizontal pipe by connecting the bolts to the corresponding fixing screw holes.

[0019] Specifically, it also includes a support nut, a support sleeve, and a connecting rod. The pile body includes vertical ribs with external threads. The support nut is screwed onto the vertical ribs. The bottom of the support sleeve has a countersunk hole that matches the support nut. The support sleeve can be fitted onto the vertical ribs and cover the support nut through the countersunk hole. One end of the connecting rod is connected to the support sleeve, and the other end of the connecting rod is connected to the horizontal pipe.

[0020] By adopting the above technical solution, the support nut can cooperate with the support sleeve to fix the static demolition device for the pile head concrete onto the vertical reinforcement.

[0021] Specifically, it also includes a lifting ring, which is connected to the top end of the central tube.

[0022] By adopting the above technical solution, after the pile head part to be broken is separated from the pile body part, the user can use a lifting ring to lift the pile head part off the pile body part.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] The system includes a central tube and multiple horizontal tubes. The bottom end of the central tube is inserted into the pile body and connected to one end of each of the multiple horizontal tubes. The other ends of each of the horizontal tubes extend outward from the central tube to the outside of the pile body. Each horizontal tube contains a pile-breaking component, and each horizontal tube has a clearance hole along its horizontal direction. One side of the pile-breaking component can pass through the clearance hole and abut against the pile body. The other side of the pile-breaking component forms a filling space between itself and the inner wall of the horizontal tube for filling with an expanding agent. This allows the bottom end of the central tube to be inserted into the pile body and connected to the multiple horizontal tubes. The pile-breaking component inside the horizontal tube forms a space between itself and the inner wall of the horizontal tube for filling with an expanding agent. This allows the user to inject an expanding agent, such as a static blasting agent, into each filling space from the top of the central tube. When this expanding agent expands, it pushes each pile-breaking component through the clearance hole and squeezes the pile body, thereby breaking off the portion of the pile head that exceeds the design elevation from the main body of the bored pile. Existing static demolition devices can only rely on the ring-shaped pre-embedded pipe to form a ring-shaped split line around the steel cage on the pile body, and cannot demolish the part inside the steel cage. In contrast, this device can effectively demolish the entire pile head, solving the problem that existing devices cannot demolish the pile head part that exceeds the design elevation. Attached Figure Description

[0025] Figure 1 This is a perspective view of a static demolition device for pile head concrete according to this application;

[0026] Figure 2 This is a top view of a static demolition device for pile head concrete according to this application;

[0027] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the AA direction;

[0028] Figure 4 yes Figure 3 A schematic enlarged view of area B in the middle, showing the sealing cap;

[0029] Figure 5 It is along Figure 3 A schematic cross-sectional view taken along the CC direction, showing only a portion of the reinforcing cage.

[0030] Attached reference numerals: 1. Central pipe; 2. Horizontal pipe; 21. Pipe breaking component; 211. Arc-shaped surface; 212. Guide surface; 213. Concrete breaking tip; 3. Reinforcing cage; 31. Vertical reinforcement; 32. Formwork; 4. Sealing cap; 41. Connecting hole; 5. Support nut; 6. Support sleeve; 7. Connecting rod; 8. Lifting ring; 9. Concrete retaining component. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 Further explanation:

[0032] See Figure 1 , Figure 2 , Figure 3 and Figure 5 The static demolition device for pile head concrete provided in this application is installed on the reinforcing cage 3 of a bored pile. Specifically, the static demolition device includes: a central pipe 1, four horizontal pipes 2, four sealing caps 4, eight support nuts 5, eight support sleeves 6, eight connecting rods 7, a lifting ring 8, and four concrete-blocking components 9. The reinforcing cage 3 of the bored pile includes eight vertical reinforcing bars 31, multiple stirrups, and four templates 32. The eight vertical reinforcing bars 31 are evenly spaced around the central axis of the borehole. The multiple stirrups are sleeved on the eight vertical reinforcing bars 31 and welded to them. The four templates 32 are distributed within the stirrups and borehole. The walls can be assembled to form an outer mold that is compatible with the bored pile. Each template 32 has a clearance groove on its side plate. When the four templates 32 are assembled, two adjacent clearance grooves are assembled to form a clearance hole that is compatible with the cross-section of the horizontal pipe 2. Specifically, each vertical rib 31 is provided with an external thread. The support nut 5 corresponds to the vertical rib 31 one by one. Each support nut 5 is screwed onto a corresponding vertical rib 31, and the bottom surface of each support nut 5 is located on the same horizontal plane. Each stirrup is located below the horizontal plane, so that the part of the bored pile above the horizontal plane is the pile head part that exceeds the design elevation.

[0033] See Figure 2 and Figure 5Each support sleeve 6 corresponds one-to-one with a vertical rib 31. Each support sleeve 6 is fitted onto a corresponding vertical rib 31. The bottom of each support sleeve 6 has a countersunk hole that matches the support nut 5. The support sleeve 6 can be fitted onto the vertical rib 31 and covered onto the support nut 5 through the countersunk hole, so that the support nut 5 can seal the gap between the bottom end of the support sleeve 6 and the vertical rib 31. It should be noted that the inner diameter of the support sleeve 6 should be set to be slightly larger than the diameter of the vertical rib 31. When pouring the bored pile, ensure that the gap between the top end of the support sleeve 6 and the vertical rib 31 is higher than the top end of the outer formwork, so that the concrete inside the outer formwork will not enter the support sleeve 6. After the static demolition device of this pile head concrete separates the pile head part that exceeds the design elevation from the pile body part, the pile head part can be directly removed from the eight vertical ribs 31 along with the eight support sleeves 6.

[0034] See Figure 3 and Figure 4 The central tube 1 is set along the central axis of the outer mold. The horizontal tubes 2 correspond one-to-one with the clearance holes. One end of each of the four horizontal tubes 2 is connected to the bottom end of the central tube 1. The other end of each horizontal tube 2 extends outward from the central tube 1 and passes through a corresponding clearance hole to the outside of the outer mold. The outer wall of each horizontal tube 2 can abut against the wall of the clearance hole. The connecting rod 7 corresponds one-to-one with the support sleeve 6. One end of each connecting rod 7 is connected to a corresponding support sleeve 6, and the other end of each connecting rod 7 is connected to an adjacent horizontal tube 2. The lifting ring 8 is connected to the top end of the central tube 1 so that after the pile head part to be broken is separated from the pile body part, the user can lift the pile head part off the pile body part through the lifting ring 8.

[0035] See Figure 4 and Figure 5 The horizontal pipe 2 has an isosceles trapezoidal cross-section with the upper base smaller than the lower base. Each horizontal pipe 2 has clearance holes on both sides along its horizontal direction, causing these holes to slope downwards away from the central axis of the horizontal pipe 2. Each horizontal pipe 2 contains two breaking members 21. A groove is formed on the inner bottom wall of each horizontal pipe 2 along the passage direction of the clearance holes. The two breaking members 21 are inserted into the groove, forming a filling space between them for the expansion agent. Each pile-breaking component 21 corresponds to a relief hole. One side of each pile-breaking component 21 can pass through the corresponding relief hole along the groove and abut against the pile body. A layer of anti-concrete component is wrapped around each horizontal pipe 2. The anti-concrete component can be a soft and easily broken membrane such as plastic film that can block concrete. This allows the anti-concrete component to prevent concrete from entering the horizontal pipe 2 from the relief hole during pouring, and also to restrict the two pile-breaking components 21 so that the two pile-breaking components 21 remain in their initial close-to-each other position before contacting the expansion agent.

[0036] See Figure 4 and Figure 5Each pile-breaking component 21 has a guide surface 212 and an arc-shaped surface 211 formed from top to bottom on one side within the filling space. The arc-shaped surface 211 increases the contact area between the pile-breaking component 21 and the expanding agent, making the force exerted by the expanding agent on the pile-breaking component 21 more uniform and more effectively pushing the pile-breaking component 21 through the clearance hole to abut against the pile body, thus enhancing the effect of breaking the pile head concrete. The guide surface 212 can be a vertical surface, allowing the expanding agent in the horizontal pipe 2 to pass through the clearance hole when the top of the pile-breaking component 21 passes through it, and then move upwards along the gap between the guide surface 212 and the outer wall of the horizontal pipe 2, leaving the clearance hole. Because when the expanding agent pushes the top of the pile-breaking component 21 out of the clearance hole, the pile-breaking component 21... The material has penetrated into the surrounding concrete to a certain extent, creating a certain gap between the pile head and the pile body to be broken. At this time, the guide surface 212 and the inclined clearance hole allow the expansion agent to push the pile breaking component 21 further out of the horizontal pipe 2 while simultaneously moving upward along the gap between the guide surface 212 and the outer wall of the horizontal pipe 2, leaving the clearance hole and pushing upward against the concrete above the horizontal pipe 2. This causes the gap between the pile head and the pile body to expand rapidly, improving the efficiency and effectiveness of breaking the pile head. Each pile breaking component 21 has a concrete breaking tip 213 formed on the side away from the filling space. This concrete breaking tip 213 can be set to be on the same horizontal plane as the bottom surface of each support nut 5.

[0037] See Figure 4 and Figure 5 Each sealing cap 4 corresponds to a horizontal pipe 2. Each horizontal pipe 2 has a fixing screw hole, and each sealing cap 4 has a connection hole 41. Each sealing cap 4 can be fitted onto the end of a corresponding horizontal pipe 2 away from the central pipe 1, and is connected to the horizontal pipe 2 by a bolt passing through the connection hole 41 and the corresponding fixing screw hole. This allows the user to prevent concrete from entering the horizontal pipe 2 by installing the sealing cap 4 when pouring concrete. Alternatively, after the bored pile is formed and the expansion agent is poured into the filling space from the central pipe 1, the sealing cap 4 can be removed to allow the air in the filling space to be discharged from the end of the horizontal pipe 2 away from the central pipe 1. Finally, after the expansion agent flows out from the end of the horizontal pipe 2 away from the central pipe 1, the sealing cap 4 is installed again and the top opening of the central pipe 1 is sealed with a sealing element such as a plug to achieve a seal for the filling space.

[0038] The working principle of the static demolition device for pile head concrete disclosed in this application is as follows:

[0039] The bottom end of the central tube 1 is inserted into the pile body and connected to multiple horizontal tubes 2. A space for filling with an expanding agent is formed between the pile-breaking component 21 inside the horizontal tube 2 and the inner wall of the horizontal tube 2. This allows the user to inject an expanding agent, such as a static blasting agent, into each filling space from the top of the central tube 1. When this expanding agent expands, it pushes each pile-breaking component 21 through the clearance hole, squeezing the pile body and thus breaking off the portion of the pile head exceeding the design elevation from the pile body. Existing static breaking devices can only rely on a ring-shaped pre-embedded pipe to form a ring-shaped split line around the reinforcing cage 3 on the pile body, and cannot break off the portion inside the reinforcing cage 3. In contrast, this device can effectively break off the entire pile head, solving the problem that existing devices cannot completely break off the portion of the pile head exceeding the design elevation.

[0040] It should be noted that the above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A static concrete breaking device for pile heads, installed on the pile body of a bored cast-in-place pile, characterized in that: The system includes a central tube (1) and multiple horizontal tubes (2). The bottom end of the central tube (1) is inserted into the pile body and connected to one end of the multiple horizontal tubes (2). The other ends of the multiple horizontal tubes (2) extend outward from the central tube (1) to the outside of the pile body. Each horizontal tube (2) is provided with a pile breaking component (21), and each horizontal tube (2) has a clearance hole opened in the horizontal direction. One side of the pile breaking component (21) can pass through the clearance hole and abut against the pile body. The other side of the pile breaking component (21) forms a filling space between itself and the inner wall of the horizontal tube (2) for filling with an expansion agent.

2. The static demolition device for pile head concrete according to claim 1, characterized in that: Each of the horizontal pipes (2) has a clearance hole on both sides of the pipe body along the horizontal direction. Each of the horizontal pipes (2) has two pile breaking parts (21) inside. A groove is provided on the inner bottom wall of the horizontal pipe (2) along the passage direction of the clearance hole. The two pile breaking parts (21) in each horizontal pipe (2) are inserted into the groove and form the filling space between the two pile breaking parts (21). The pile breaking parts (21) correspond one-to-one with the clearance hole. One side of each pile breaking part (21) can pass through the corresponding clearance hole along the groove and abut against the pile body.

3. The static demolition device for pile head concrete according to claim 2, characterized in that: Each of the aforementioned pile-breaking components (21) has an arc-shaped surface (211) formed on one side of the filling space.

4. The static demolition device for pile head concrete according to claim 2, characterized in that: The clearance hole is inclined from top to bottom in a direction away from the central axis of the horizontal tube (2). Each of the pile breaking parts (21) has a guide surface (212) formed on the side away from the clearance hole. When the top of the pile breaking part (21) passes through the clearance hole, the expansion agent in the horizontal tube (2) can pass through the clearance hole and leave the clearance hole upward along the gap between the guide surface (212) and the outer wall of the horizontal tube (2).

5. The static demolition device for pile head concrete according to claim 1, characterized in that: It also includes multiple sealing caps (4), each sealing cap (4) corresponding to a horizontal pipe (2), and each sealing cap (4) is detachably connected to the end of the corresponding horizontal pipe (2) away from the central pipe (1) and can seal the horizontal pipe (2).

6. The static demolition device for pile head concrete according to claim 5, characterized in that: Each of the horizontal tubes (2) has a fixing screw hole on its body, and each of the sealing caps (4) has a connecting hole (41). The sealing cap (4) can be sleeved on the end of the corresponding horizontal tube (2) away from the central tube (1), and is connected to the horizontal tube (2) by a bolt passing through the connecting hole (41) of the sealing cap (4) and the corresponding fixing screw hole.

7. The static demolition device for pile head concrete according to claim 1, characterized in that: It also includes a support nut (5), a support sleeve (6) and a connecting rod (7). The pile body includes a vertical rib (31), which has an external thread. The support nut (5) is screwed onto the vertical rib (31). The bottom of the support sleeve (6) has a countersunk hole that matches the support nut (5). The support sleeve (6) can be fitted onto the vertical rib (31) and covered onto the support nut (5) through the countersunk hole. One end of the connecting rod (7) is connected to the support sleeve (6), and the other end of the connecting rod (7) is connected to the horizontal pipe (2).

8. The static demolition device for pile head concrete according to claim 1, characterized in that: It also includes a lifting ring (8) which is connected to the top end of the central tube (1).

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