Composite cast-in-place pile head construction device facilitating pile cutting

Abstract

A composite cast-in-place pile head construction device facilitating pile cutting comprises a carrier plate, the lower end of the carrier plate is supported through fixing stirrups, a grouting guide pipe hole is formed in the center of the carrier plate, multiple sets of inserting holes are formed in the edge of the carrier plate in the circumferential direction, sleeves are fixed to the upper ends of the inserting holes, the top ends of the sleeves are sleeved with protective pipes, and the sleeves and the protective pipes form a sheath. The top of the sheath is blocked by a pipe cap; and the main reinforcements of the reinforcement cage penetrate through the corresponding insertion holes and extend into the sheath. According to the composite cast-in-place pile head construction device facilitating pile cutting, a large amount of manpower can be saved, and the construction period can be shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to pile foundation construction technical field, especially a composite bored pile pile head construction device convenient to cut pile. BACKGROUND

[0002] With the increasing demand of city to house, city construction develops rapidly, and housing engineering tends to high podium, deep foundation and large area extension, so the natural foundation and foundation after general treatment can not meet the load bearing of building, and reinforced concrete bored pile is more and more popular and general. The pile head of reinforced concrete bored pile needs to be chiseled to ensure that the reinforced concrete bored pile is anchored into the pile cap or bottom plate. However, the traditional pile head chiseling generally adopts mechanical tools such as air pick, cutting saw and the like to chisel and cut manually, which is complicated to operate, consumes a lot of construction period, labor, machinery and materials, and is not cost-effective. Moreover, the traditional pile head chiseling is affected by various factors such as labor, machinery, materials, methods and working environment, which is easy to damage the main reinforcement, it is difficult to ensure that the pile head of the engineering pile is not damaged, and the chiseling quality of the pile head is also difficult to guarantee. SUMMARY

[0003] The utility model solves the technical problem to provide a composite bored pile pile head construction device convenient to cut pile, which can save a lot of manpower and construction period, and greatly reduce the quality problem of damaging the pile head during cutting.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of:

[0005] A composite bored pile pile head construction device convenient to cut pile, comprising a carrier plate, the lower end of the carrier plate is supported by a fixed hoop, a grouting guide pipe hole is formed in the center of the carrier plate, a plurality of groups of insertion holes are arranged on the edge of the carrier plate in a circumferential direction, a sleeve pipe is fixed to the upper end of the insertion hole, a protective pipe is sleeved on the top end of the sleeve pipe, the sleeve pipe and the protective pipe form a protective sleeve, and the top of the protective sleeve is sealed by a pipe cap; the main reinforcement of the reinforcement cage passes through the corresponding insertion hole and extends into the protective sleeve.

[0006] The carrier plate is a steel plate, and the sleeve pipe is a seamless galvanized steel pipe.

[0007] The protective pipe is a PVC pipe.

[0008] The sleeve pipe and the carrier plate are welded and fixed.

[0009] The sleeve pipe and the carrier plate are detachably connected and fixed by the clamping assembly.

[0010] The clamping assembly comprises a threaded sleeve, which is threadedly connected with the sleeve and partially protrudes, a clamping head is connected inside the threaded sleeve through a spring, and the clamping head has a large end and a small end away from the sleeve; a mounting hole matched with the threaded sleeve is formed on the corresponding carrier plate, and a top block is fixed at the bottom end in the mounting hole, when the clamping assembly is inserted, the clamping head moves upward, the clamping ball in the threaded sleeve partially protrudes out of the through hole of the threaded sleeve and is clamped with the groove on the mounting hole.

[0011] The utility model provides a composite bored pile pile head construction device convenient to cut pile, has the following technical effects:

[0012] 1), through this device, can realize the broken chisel type cutting pile to the tension compression type cutting pile, replace the cutting pile mode of "mechanical + manual", save a lot of manpower, machinery and construction period, thereby protect the anchoring section pile head and main reinforcement from being destroyed.

[0013] 2), adopt welding mode to fix the carrier plate, simplify the structure of this device, and guarantee reliable connection.

[0014] 3), adopt the clamping assembly to detachably fix the sleeve on the carrier plate, so compared with welding, the construction process can be simplified, and the installation efficiency is improved, meanwhile, the limiting sleeve can be detachably installed, so the limiting sleeve can be replaced conveniently, so as to adapt to the main reinforcement of the reinforcement cage with different diameters.

[0015] 4), the patent "a kind of reinforced concrete bored pile even, fast cutting device for pile" with application number "202222203210.3", the top reinforcement of bored pile foundation is wrapped with plastic film, and is sealed and fixed by being sleeved into PVC sleeve pipe with matched inner diameter, forms the interface isolation of pile foundation reinforcement and concrete, so that the overfill section concrete of bored pile loses the adhesion gripping force effect with pile foundation reinforcement, and then makes the bored pile foundation concrete have greater brittle fracture when breaking, and is more easily broken and chiseled off. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in connection with the drawings and examples:

[0017] Figure 1 It is the installation schematic view (the first kind) of the utility model.

[0018] Figure 2 It is the plan view (the second kind) of carrier plate in the utility model.

[0019] Figure 3 It is the connection schematic view of carrier plate and sleeve in the utility model.

[0020] Figure 4 It is the installation schematic view (the second kind) of the utility model.

[0021] Figure 5 It is the local enlarged schematic view (the second kind) of the utility sleeve and carrier plate connection in the utility model.

[0022] Figure 6 It is Figure 5 The local enlarged schematic view of A place in.

[0023] In the drawing: carrier plate 1, reinforcement cage main reinforcement 2, protective tube 3, sleeve 4, jack 5, grouting duct hole 6, pipe cap 7, clamping assembly 8, threaded sleeve 8.1, spring 8.2, clamping head 8.3, clamping ball 8.4, mounting hole 8.5, top block 8.6, limiting sleeve 9. Specific implementation

[0024] As Figures 1-4 Indicated, a kind of composite bored pile pile head construction device of convenient cutting pile, including carrier plate 1, fixed hoop, protective tube 3, sleeve 4.

[0025] The carrier plate 1 adopts 3mm thick Q235 steel plate. According to the size of reinforcement cage main reinforcement 2 of the bored pile, the spacing is cut and punched to form jack 5 in the corresponding position on carrier plate 1, grouting duct hole 6 is arranged in the middle of carrier plate 1, and the diameter of grouting duct hole 6 should be 50mm larger than the diameter of grouting duct.

[0026] The fixed hoop is arranged at pile top position, is tied together with reinforcement cage, and is used to support and support carrier plate 1, to prevent carrier plate 1 from falling off.

[0027] Each jack 5 is correspondingly fixed with sleeve 4, and sleeve 4 adopts seamless galvanized steel pipe, and the diameter is 4mm larger than the main reinforcement cage.

[0028] Protective tube 3 is PVC pipe, and the diameter of protective tube 3 is 8mm larger than the main reinforcement cage, the wall thickness is 1.9mm, and it is medium electrical conduit.

[0029] As Figure 1 Indicated, sleeve 4 and carrier plate 1 can be fixed by welding. When welding is used, jack 5 is a round hole, and the inner diameter of jack 5 matches the outer diameter of reinforcement cage main reinforcement 2, so that jack 5 is inserted into sleeve 4 through carrier plate 1.

[0030] As Figure 4As shown, or, the sleeve 4 is detachably connected and fixed with the carrier plate 1 through the clamping assembly 8. At this time, the insertion hole 5 of the carrier plate 1 is a counterbore hole, and the inner diameter of the counterbore hole is greater than the outer diameter of the main reinforcement 2 of the reinforcement cage. The limiting sleeve 9 is matched with the insertion hole 5 and is compressed by the sleeve 4. The center hole of the limiting sleeve 9 is matched with the outer diameter of the main reinforcement 2 of the reinforcement cage. Thus, different limiting sleeves 9 can be replaced according to different specifications of the main reinforcement 2 of the reinforcement cage, so as to meet the use of various cast-in-place piles.

[0031] As shown in Figure 6 The clamping assembly 8 includes a threaded sleeve 8.1, the outer upper end of the threaded sleeve 8.1 is threadedly connected with the sleeve 4, the inside of the threaded sleeve 8.1 is connected with a clamping head 8.3 through a spring 8.2, one end of the clamping head 8.3 towards the opening of the lower end of the threaded sleeve 8.1 is large, the other end is small, and the large head and the small head are transitioned through an arc surface. A plurality of through holes are opened in the lower end of the threaded sleeve 8.1 in the circumferential direction, and a clamping ball 8.4 partially extends out of the through hole of the threaded sleeve 8.1. Correspondingly, the carrier plate 1 is provided with a mounting hole 8.5 matched with the threaded sleeve 8.1, the inner bottom end of the mounting hole 8.5 is provided with a top block 8.6 matched with the large head of the clamping head 8.3, and the side wall of the mounting hole 8.5 is provided with a groove 8.7 matched with the clamping ball 8.4. When the clamping assembly 8 of the sleeve 4 is aligned and pressed into the mounting hole 8.5, the top block 8.6 will lift the clamping head 8.3 upwards, the clamping head 8.3 will push the clamping ball 8.4 out of the through hole and be clamped with the groove 8.7 in the mounting hole 8.5, thereby achieving fastening and limiting.

[0032] When the sleeve 4 is fixed with the carrier plate 1 by welding, the working principle and process are as follows:

[0033] 1) Protection pipe and steel plate manufacturing

[0034] According to the design requirements of the drawing, the length of the pile body reinforcement is calculated, the size of the reinforcement is strictly controlled, and the length of the reinforcement cage anchored into the foundation is ensured to be not less than 500mm. Mark 4 places at 150mm above the design elevation of the reinforcement cage pile top with red paint to determine the installation position of the carrier plate 1 and the protection pipe 3. And according to the actual remaining anchoring length of the reinforcement cage, the length of the protection pipe 3 is cut and configured by using PVC special scissors, and the one end of the protection pipe 3 is sealed and compacted by using a special pipe cap 7 to avoid the concrete grouting slurry flowing into the protection pipe 3.

[0035] The carrier plate 1 for isolation is manufactured according to the size, spacing, protective layer and grouting pipe diameter of the reinforcement concrete cast-in-place pile. That is, according to the diameter of the cast-in-place pile, a grouting pipe hole 6 with a diameter greater than the grouting pipe is cut in the center of the carrier plate 1, which facilitates the lower pipe, and 8 insertion holes 5 (the number and diameter are determined according to the reinforcement cage grouting) are punched on the circumference of the carrier plate 1 at a distance from the edge of the carrier plate 1 in the circumferential direction. After the punching is completed, a sleeve 4 is welded at each insertion hole 5, which is used to fix the protection pipe 3.

[0036] 2) Trial assembly of protective tube and carrier plate

[0037] After the protective tube 3 and the carrier plate 1 are manufactured, to avoid the quality problems such as disconnection or concrete entering the protective tube 3, trial assembly should be performed on the manufactured parts.

[0038] 3) Steel cage binding and installation of protective tube and carrier plate

[0039] After the steel is processed according to the design and specifications, the steel cage is bound. After the steel is bound, four marks are made at 180 mm above the design elevation of the top of the steel cage based on the design, and a welded fixing hoop is added to fix the carrier plate 1 and prevent the protective tube + carrier plate assembly from falling off. After the steel cage is bound, the protective tube 3 and the carrier plate 1 are installed. Before installation, the carrier plate 1 and the anchoring steel are coated with a concrete release agent to separate the pile head concrete from the engineering pile concrete. The carrier plate 1 is installed by aligning the main reinforcement with the hole 5, and then fixed to the additional welded fixing hoop with a 22 gauge binding wire. After the carrier plate 1 is fixed, the gap between the bottom of the carrier plate 1 and the main reinforcement is sealed with sealing paste to prevent mud from flowing into the protective tube 3. The manufactured protective tube 3 is then inserted into the sleeve 4 on the carrier plate 1, and the quality of the socket joint should be ensured.

[0040] 4) Hoisting the steel cage and pouring concrete

[0041] When hoisting the steel cage, the lifting point should be selected reasonably and fixed firmly. During hoisting and placing the steel cage, attention should be paid to the protective tube 3 and the carrier plate 1 that have been installed to avoid collision. If collision is unavoidable, stop placing and repair, and then continue hoisting and placing after repair. After the steel cage is hoisted and placed in position and the pouring guide pipe is placed in position, the position of the steel cage, the elevation and integrity of the protective tube 3 and the carrier plate 1 are checked and adjusted in time, and then pouring of concrete is allowed after passing the inspection. The pouring speed of concrete should be controlled about 1 m away from the pile head to avoid the concrete pushing the carrier plate 1 and forcing the steel cage to float up, so as to ensure the densification of the concrete above and below the carrier plate 1.

[0042] 5) Hoisting and cutting the pile head

[0043] The pile head can be lifted off after the concrete age of the engineering pile reaches 28 days or the concrete strength meets the requirements of the specification. The pile head of the engineering pile is bound with steel wire rope, the steel wire rope at the lifting point should be fixed firmly, and it is ensured that the pile head can be lifted vertically. The excavator or tower crane is used for vertical lifting, and horizontal lifting is strictly prohibited during lifting. The lifting angle is controlled within 75°-90°. When the pile head is lifted, the pulling force should be applied slowly at first and then quickly. When the pile head is loosened and the main reinforcement can be stripped well, the pile head is pulled out, and the main reinforcement of the pile head is prevented from being damaged or skewed.

Claims

1. A composite cast-in-place pile head construction device for easy pile cutting, characterized in that: The utility model provides a kind of steel bar cage, including carrier plate (1), carrier plate (1) lower end is supported by fixed hoop, carrier plate (1) center is opened with grouting guide pipe hole (6), carrier plate (1) edge circumferentially is equipped with multiple groups of jack (5), jack (5) upper end is fixed with sleeve pipe (4), sleeve pipe (4) top end is equipped with protective tube (3), sleeve pipe (4), protective tube (3) form sheath, and sheath top is plugged by pipe cap (7);Steel bar cage main reinforcement (2) passes through corresponding jack (5) and extends into sheath.

2. The composite bored pile head construction device facilitating stubbing according to claim 1, characterized in that: The carrier plate (1) is a steel plate, and the sleeve pipe (4) is a seamless galvanized steel pipe.

3. The composite bored pile head construction device facilitating stubbing according to claim 1, characterized in that: The protective tube (3) is a PVC pipe.

4. The composite bored pile head construction device facilitating stubbing according to claim 2, characterized in that: The sleeve pipe (4) and the carrier plate (1) are welded and fixed.

5. The composite bored pile head construction device facilitating stubbing according to claim 2, characterized in that: The sleeve pipe (4) and the carrier plate (1) are detachably connected and fixed by a clamping assembly (8).

6. The composite bored pile head construction device facilitating stubbing according to claim 5, characterized in that: The clamping assembly (8) includes a threaded sleeve (8.1), which is threadedly connected with the sleeve pipe (4) and partially extends out, and a clamping head (8.3) connected with the threaded sleeve (8.1) by a spring (8.2) inside the threaded sleeve (8.1), wherein one end of the clamping head (8.3) away from the sleeve pipe (4) is larger, and the other end is smaller. Correspondingly, an installation hole (8.5) matched with the threaded sleeve (8.1) is formed on the carrier plate (1), and a top block (8.6) is fixed at the bottom of the installation hole (8.5). When the clamping assembly (8) is inserted, the clamping head (8.3) moves upward, a clamping ball (8.4) in the threaded sleeve (8.1) partially extends out of the through hole of the threaded sleeve (8.1) and is clamped with a groove (8.7) on the installation hole (8.5).

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