A pile tip preparation device for efficiently breaking through the soil and sinking a pipe pile

Abstract

The utility model discloses a pile tip preparation device which enables a pipe pile to efficiently break the ground and sink, comprising a cylindrical cover plate, one end of which can be used for concrete input and pouring, and a circular ring cover plate is concentrically arranged on the outer side of the other end, a truncated cone cover plate concentric with the circular ring cover plate is detachably arranged on the side of the circular ring cover plate away from the cylindrical cover plate, and a hemispherical bottom plate is concentrically arranged on the end of the truncated cone cover plate away from the cylindrical cover plate. The utility model adopts a hemispherical cover plate at the bottom of the pile tip mold, so that the prepared pile tip is stronger and less prone to breakage than the traditional conical pile tip, and has a smaller contact area with the ground than the traditional truncated cone pile tip, has a higher ground breaking efficiency, and ensures the construction progress.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe piles, in particular to a pile tip preparation device which enables a pipe pile to break through the soil and sink efficiently. Background Art

[0002] Pipe piles are a kind of building material, generally driven into the ground as foundation materials. They are prefabricated engineering piles. As the foundation material of buildings, pipe piles have two main uses: one is to transfer the weight of the building above to the lower soil layer with high bearing capacity through the pipe piles to improve the stability of the building; the other is to squeeze and compact the soft soil layer, thereby improving the bearing capacity of the foundation soil. Therefore, pipe piles are widely used in large-scale engineering facilities such as railways, roads, bridges, and ports.

[0003] However, during the construction of pipe piles, it was found that the friction of the soil will have a variety of effects on the construction of pipe piles. The first is the increase in construction resistance. The friction resistance between the soil and the pile body is one of the main resistances in construction. With the increase of friction, the thrust required to drive the pile body will also increase accordingly, resulting in an increase in the difficulty of the entire construction process. Secondly, the friction between the soil and the pile body will slow down the sinking speed of the pile body, which will increase the construction period and reduce economic benefits. Finally, the friction between the soil and the pile body will cause vibration and noise, which will affect the nearby environment and structures. Controlling friction will help reduce vibration and noise levels. These problems caused by friction will have a great impact on the construction of pipe piles.

[0004] Therefore, it is urgent to improve the processing of pipe piles, reduce the friction during construction, and reduce the impact of friction, so as to improve the efficiency of breaking the ground and sinking piles during pile driving. The concrete pile tip produced by traditional methods is mainly conical, and the conical pile tip has a small force-bearing area. When the pile tip sinks into the soil, it is easy to break, affecting the construction process. Summary of the invention

[0005] In order to solve the technical problems raised in the above background technology, the utility model provides a pile tip preparation device which enables a pipe pile to break through the soil and sink efficiently.

[0006] The utility model is implemented by the following technical scheme: a pile tip preparation device that enables a pipe pile to efficiently break the ground and sink, comprising a cylindrical cover plate, one end of the cylindrical cover plate being used for concrete input and pouring, and a circular ring cover plate being concentrically arranged on the outer side of the other end, a truncated cone cover plate concentric with the circular ring cover plate being detachably arranged on the side of the circular ring cover plate away from the cylindrical cover plate, and a hemispherical bottom plate being concentrically arranged on the end of the truncated cone cover plate away from the cylindrical cover plate.

[0007] As a further improvement of the above solution, the inner diameter of the cylindrical cover plate is the same as the inner diameter of the annular cover plate.

[0008] As a further improvement of the above solution, the inner diameter of the end of the truncated cone-shaped cover plate close to the cylindrical cover plate is larger than the inner diameter of the end of the truncated cone-shaped cover plate away from the cylindrical cover plate.

[0009] As a further improvement of the above solution, the inner diameter of the end of the truncated cone-shaped cover plate away from the cylindrical cover plate is equal to the inner diameter of the hemispherical bottom plate.

[0010] As a further improvement of the above solution, the cylindrical cover plate and the corresponding annular cover plate are fixed by welding.

[0011] As a further improvement of the above solution, the truncated cone-shaped cover plate and the hemispherical bottom plate are fixed by welding.

[0012] As a further improvement of the above scheme, two rectangular plates are relatively arranged on the outer peripheral side of the circular cover plate, and screw holes are reserved on the rectangular plates. When the corresponding rectangular plates on the two circular cover plates are fitted together, the two screw holes are rotated and screwed together by bolts.

[0013] As a further improvement of the above scheme, two groups of through holes are opened on the outer peripheral side wall of the cylindrical cover plate away from one end of the truncated cone cover plate, the number of through holes in each group is two, and the two through holes in each group are arranged opposite to each other on the outer peripheral side wall of the cylindrical cover plate, and the through holes can be used for steel bars to pass through.

[0014] As a further improvement of the above solution, a connection line between two through holes in one group and a connection line between two through holes in another group are in a cross-intersection state in different planes and perpendicular to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The pile tip preparation device of the utility model enables the pipe pile to break the ground and sink efficiently. By adopting a hemispherical cover plate at the bottom of the pile tip mold, the prepared pile tip is stronger and less prone to breakage than the traditional conical pile tip, and has a smaller contact area with the ground than the traditional truncated cone pile tip, so the ground breaking efficiency is higher, ensuring the construction progress.

[0017] 2. The pile tip preparation device of the utility model, which enables the pipe pile to break the ground and sink efficiently, can make the pile tip and the prefabricated pile separately and then splice them on site without affecting the production efficiency of the original prefabricated pile, thus ensuring the efficiency and safety of the prefabricated pile production.

[0018] 3. The pile tip preparation device of the utility model enables the pipe pile to break the ground and sink efficiently, and can process and inject a hemispherical pile tip on the buried end of the pipe pile, which not only reduces the sinking resistance of the pipe pile during construction to achieve the construction effect of a single outer side subjected to friction, but also improves the strength of the pile tip, reduces the influence of friction and improves the efficiency and benefits of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the pile tip preparation device after the cylindrical cover plate and the annular cover plate are combined;

[0020] Figure 2 It is a schematic diagram of the structure of the pile tip preparation device in a flipped and inverted state after the truncated cone-shaped cover plate and the hemispherical bottom plate are combined;

[0021] Figure 3 It is a schematic diagram of the overall structure of the pile tip preparation device of the utility model;

[0022] Figure 4 This is a schematic diagram of the overall structure of the prefabricated concrete pile tip of the utility model;

[0023] Figure 5 This is a cross-sectional view of concrete reinforcement in the pile tip preparation device of the utility model;

[0024] Figure 6 for Figure 4 Sectional view at AA in the middle;

[0025] Figure 7 A schematic diagram of a prefabricated pile structure with a prefabricated concrete pile tip according to the utility model installed;

[0026] Figure 8 A top view of a prefabricated pile with a prefabricated concrete pile tip according to the utility model installed;

[0027] Fig. 9 for Figure 7 Vertical section view of precast piles.

[0028] Description of main symbols:

[0029] 1. Cylindrical cover plate; 2. Ring-shaped cover plate; 3. Rectangular plate; 4. Cone-shaped cover plate; 5. Hemispherical bottom plate; 6. Steel bars; 7. Through holes. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0031] Please combine Figures 1 to 9 The pile tip preparation device that enables the pipe pile to efficiently break through the ground and sink includes a cylindrical cover plate 1. The cylindrical cover plate 1 is made of steel with a thickness of about 1.5 cm. The inner diameter of the cylindrical cover plate 1 is equal to the inner diameter of the precast concrete pipe pile, and the height of the cylindrical cover plate 1 should be greater than 60 cm.

[0032] Two groups of through holes 7 are opened on the outer peripheral side wall of the cylindrical cover plate 1 away from one end of the truncated cone cover plate 4. The number of through holes 7 in each group is two, and the two through holes 7 in each group are arranged opposite to each other on the outer peripheral side wall of the cylindrical cover plate 1. The through holes 7 can be used for the steel bars 6 to pass through.

[0033] Steel bars 6: Several 12mm diameter steel bars, used for welding reinforcement to make steel bar frames to improve the strength of precast concrete pile tips; 30mm diameter high-strength hot-rolled steel bars of HRB500 grade. Two cross-shaped steel bars penetrate the cylindrical cover plate 1 to fix the poured concrete pile tips on the precast concrete pipe piles.

[0034] The connection line between two through holes 7 in one group and the connection line between two through holes 7 in another group are in a cross-intersecting state with different planes and perpendicular to each other.

[0035] Specifically, a through hole 7 with a diameter of 1.5 cm is reserved symmetrically along the axis 10 cm from the top of the cylindrical cover plate 1, and two through holes 7 with a diameter of 1.5 cm are reserved along the axis 3 cm below the through hole. The line connecting the two through holes 7 on the upper side and the line connecting the two through holes 7 on the lower side are in a cross shape when viewed from above.

[0036] One end of the cylindrical cover plate 1 can be used for concrete input and pouring, and a circular ring cover plate 2 is concentrically arranged on the outer side of the other end.

[0037] The annular cover plate 2 is made of steel with a thickness of about 1.5 cm. The inner diameter of the annular cover plate 2 is equal to the inner diameter of the precast concrete pile, and the outer diameter of the annular cover plate 2 should be 1.5 cm larger than the outer diameter of the precast concrete pile.

[0038] A concentric truncated cone-shaped cover plate 4 is detachably provided on one side of the annular cover plate 2 away from the cylindrical cover plate 1. The truncated cone-shaped cover plate 4 is made of steel with a thickness of about 1.5 cm. The inner diameter of the bottom of the truncated cone-shaped cover plate 4 is equal to the outer diameter of the precast concrete pile, and the inner diameter of the top of the truncated cone-shaped cover plate 4 is about 10 cm.

[0039] A hemispherical bottom plate 5 is coaxially arranged at one end of the truncated cone-shaped cover plate 4 away from the cylindrical cover plate 1 .

[0040] The hemispherical bottom plate 5 is made of steel, the thickness of the steel plate is about 1.5 cm, and the inner diameter is about 10 cm. The hemispherical bottom plate 5 should be consistent with the top inner diameter of the truncated cone cover plate 4.

[0041] The inner diameter of the cylindrical cover plate 1 is the same as the inner diameter of the annular cover plate 2 .

[0042] The inner diameter of the end of the truncated cone-shaped cover plate 4 close to the cylindrical cover plate 1 is larger than the inner diameter of the end of the truncated cone-shaped cover plate 4 far from the cylindrical cover plate 1 .

[0043] The outer diameter of the truncated cone-shaped cover plate 4 close to one end of the cylindrical cover plate 1 is equal to the outer diameter of the annular cover plate 2 .

[0044] The inner diameter of the end of the truncated cone-shaped cover plate 4 away from the cylindrical cover plate 1 is equal to the inner diameter of the hemispherical bottom plate 5 .

[0045] The cylindrical cover plate 1 and the corresponding annular cover plate 2 are fixed by welding.

[0046] The truncated cone-shaped cover plate 4 and the hemispherical bottom plate 5 are fixed by welding.

[0047] Two rectangular plates 3 are arranged on the outer circumference of the annular cover plate 2, and two rectangular plates 3 are also arranged on the outer circumference of the truncated cone cover plate 4 near one end of the cylindrical cover plate 1. Screw holes (not marked) are reserved on the rectangular plates 3.

[0048] When the annular cover plate 2 and the truncated cone cover plate 4 are fitted together close to one end of the cylindrical cover plate 1 , the two screw holes are rotated and screwed together by bolts (not shown), thereby completing the installation and fixation between the two annular cover plates 2 .

[0049] The rectangular plate 3 is made of steel with a thickness of about 1.5 cm and is welded to the annular cover plate 2 to fix the cylindrical cover plate 1 and the truncated cone cover plate 4 of the pile tip.

[0050] This embodiment provides a method for preparing a pile tip using the above pile tip preparation device, and the steps are as follows:

[0051] S1: Fit the inner diameters of the cylindrical cover plate 1 and the annular cover plate 2 together and weld them along the inner diameters;

[0052] S2: Fit the inner diameter of the small diameter end of the truncated cone-shaped cover plate 4 to the inner diameter of the hemispherical bottom plate 5, and weld along the inner diameter;

[0053] S3: Welding a corresponding number of rectangular plates 3 to the corresponding outer peripheral side walls of the annular cover plate 2 and the corresponding outer peripheral side walls of the truncated cone-shaped cover plate 4 respectively;

[0054] S4: reinforcement, welding steel bars with a diameter of 12 mm according to the prefabricated shape and placing them in the welded truncated cone-shaped cover plate 4 and the corresponding annular cover plate 2.

[0055] S5: Align the corresponding rectangular plates 3 on the annular cover plate 2 and the truncated cone cover plate 4, and lock and fix the cylindrical cover plate 1 and the truncated cone cover plate 4 with fully threaded bolts.

[0056] S6: Two high-strength steel bars with a diameter of 3 cm are inserted into the through holes 7 reserved on the cylindrical cover plate 1 to assemble and form a pile tip mold.

[0057] S7: Spray the release agent evenly on the pile tip mold and the steel bar 6

[0058] S8: pour concrete into the pile tip mold. As a further illustration of this solution, the strength of the poured concrete is not less than C60.

[0059] S9: After waiting for the concrete to be formed, unscrew the fully threaded bolts and pull out the steel bar 6 to prefabricate the concrete pile tip and take it out.

[0060] S10: insert the precast concrete pile tip into the precast concrete pipe pile, and connect them with a high-strength steel bar 6 penetrating the two. A circular hole corresponding to the through hole on the cylindrical cover plate 1 should be reserved at the bottom of the precast concrete pipe pile.

[0061] Specifically, please combine Figure 1 , place the annular cover plate 2 on a flat ground, then place the cylindrical cover plate 1 on the annular cover plate 2, ensuring that the inner diameter of the end of the cylindrical cover plate 1 away from the reserved through hole 7 fits the inner diameter of the annular cover plate 2, then weld the annular cover plate 2 and the cylindrical cover plate 1 at the contact point along the outer diameter of the bottom of the cylindrical cover plate 1. Place the rectangular plate 3 symmetrically at both ends of the annular cover plate 2 along the center of the circle and weld them.

[0062] Place the truncated cone-shaped cover plate 4 along the large diameter end on the flat ground, and similarly place the rectangular plate 3 symmetrically along the center of the circle at the corresponding position on the outer wall of the truncated cone-shaped cover plate 4 close to one end of the cylindrical cover plate 1 for welding, and fit the hemispherical bottom plate 5 and the small diameter end of the truncated cone-shaped cover plate 4 along the outer diameter for welding, as shown in FIG. Figure 2 shown.

[0063] Take several steel bars with a diameter of 12mm. Bend the bottom of eight steel bars into a hook shape, ensuring that the length of the long straight end of the steel bar after bending is still greater than the height of the cylindrical cover with holes. Bend eight more steel bars and weld the bottom of the eight steel bars to form a tapered steel bar frame. Weld the eight steel bars with hooks to the vertical ends of the tapered steel bars in sequence, and add three circumferential stirrups to reinforce the steel bar frame. Figure 5 shown.

[0064] Fix the lower cover plate of the pile tip casting mold vertically on the ground, place the welded steel frame in the lower cover plate of the pile tip casting mold, align the large diameter end of the circular cover plate, the truncated cone cover plate and the rectangular plate with screw holes (upper) and the rectangular plate with screw holes (lower) in sequence, and fix the pile tip upper cover plate and the pile tip lower cover plate with fully threaded bolts.

[0065] Two high-strength steel bars with a diameter of 3 cm are inserted into the through holes 7 of the cylindrical cover plate 1. Figure 3 shown.

[0066] The release agent is evenly applied to the inside of the pile tip casting mold, the steel frame and the surface of the high-strength steel bars to make the cast concrete easily separated from the mold and improve work efficiency.

[0067] Cast the mold to the installed pile tip ( Figure 3 ) When pouring concrete with strength greater than C60, the pouring speed should not be too fast. Stop pouring when it is parallel to the top of the cylindrical cover plate 1 and wait for the concrete to be formed.

[0068] After the concrete is formed, take out the steel bar 6 that runs through the cylindrical cover plate 1, and unscrew the fully threaded bolts that fix the pile tip casting mold. Take down the cylindrical cover plate 1, then turn the device over so that the cylinder end stands on the ground, and take out the pile tip (such as Figure 4 as shown).

[0069] Insert the cylindrical end of the poured concrete pile tip into the reserved hole pipe pile, ensuring that the concrete pile tip hole is aligned with the reserved hole of the pipe pile. Pass the high-strength steel bar through the concrete pile tip hole and the reserved hole of the pipe pile to connect the concrete pile tip and the pipe pile, and cut off the excess high-strength steel bar to ensure that the length of the inserted steel bar is equal to the outer diameter of the pipe pile.

[0070] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pile tip preparation device for efficiently breaking through the ground and sinking a pipe pile, characterized in that: It comprises a cylindrical cover plate, one end of which is used for concrete input and pouring, and a circular cover plate is concentrically arranged on the outer side of the other end, a truncated cone cover plate concentric with the circular cover plate is detachably arranged on the side away from the cylindrical cover plate, and a hemispherical bottom plate is concentrically arranged on the end of the truncated cone cover plate away from the cylindrical cover plate.

2. The pile tip preparation device for efficiently breaking through the soil and sinking the pipe pile as claimed in claim 1, characterized in that: The inner diameter of the cylindrical cover plate is the same as the inner diameter of the annular cover plate.

3. The pile tip preparation device for efficiently breaking through the soil and sinking the pipe pile as claimed in claim 1, characterized in that: The inner diameter of the truncated cone-shaped cover plate at one end close to the cylindrical cover plate is larger than the inner diameter of the end away from the cylindrical cover plate.

4. The pile tip preparation device for efficiently breaking through the soil and sinking a pipe pile as claimed in claim 1, characterized in that: The inner diameter of the truncated cone-shaped cover plate at one end away from the cylindrical cover plate is equal to the inner diameter of the hemispherical bottom plate.

5. The pile tip preparation device for efficiently breaking through the soil and sinking a pipe pile as claimed in claim 1, characterized in that: The cylindrical cover plate and the corresponding annular cover plate are fixed by welding.

6. The pile tip preparation device for efficiently breaking through the soil and sinking a pipe pile as claimed in claim 1, characterized in that: The truncated cone-shaped cover plate and the hemispherical bottom plate are fixed by welding.

7. The pile tip preparation device for efficiently breaking through the soil and sinking a pipe pile as claimed in claim 1, characterized in that: Two rectangular plates are arranged opposite to each other on the outer circumference of the annular cover plate, and screw holes are reserved on the rectangular plates. When the corresponding rectangular plates on the two annular cover plates are fitted together, the two screw holes are rotatably screwed and fixed by bolts.

8. The pile tip preparation device for efficiently breaking through the soil and sinking a pipe pile as claimed in claim 1, characterized in that: The cylindrical cover plate has two groups of through holes on its outer peripheral side wall away from one end of the truncated cone-shaped cover plate. Each group has two through holes, and the two through holes in each group are arranged opposite to each other on the outer peripheral side wall of the cylindrical cover plate. The through holes can be used for steel bars to pass through.

9. The pile tip preparation device for efficiently breaking through the soil and sinking a pipe pile as claimed in claim 8, characterized in that: The connection line between two through holes in one group and the connection line between two through holes in another group are in a cross-intersecting state with different planes and perpendicular to each other.

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