Pile head concrete foundation and pouring mold thereof

Abstract

The utility model relates to a pile head concrete foundation and a pouring mold thereof, the pouring mold comprises an outer mold and an inner mold, and embedded steel bars are transversely and longitudinally arranged in a mold cavity of the outer mold at equal intervals; the lower end of the inner mold is aligned with the bottom elevation of the outer mold, and the upper end of the inner mold is higher than or equal to the top elevation of the outer mold; the diameter of the inner mold is matched with that of a pile head; the bearing rib reserved barrels are symmetrically arranged based on the inner mold, one ends of the bearing rib reserved barrels abut against the outer wall of the inner mold, the other ends of the bearing rib reserved barrels abut against the inner wall of the outer mold, and the two symmetrical bearing rib reserved barrels are coaxially arranged; two conical die holes are formed in the middle of the pile head concrete foundation; a bearing bar reserved cylinder penetrating through the die hole is pre-buried in the lower portion of the concrete body, and a bearing steel bar is arranged in the bearing bar reserved cylinder in a penetrating mode and falls on the concrete top face of the pile head. The mould provided by the utility model is used for prefabricating concrete foundations in factories, so that the pile head foundations can be prefabricated in batches, the wet construction on site is saved, and the effect of quick installation is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of concrete foundation technology, specifically relating to a pile head concrete foundation and its casting mold. Background Technology

[0002] With the development of construction technology, projects such as photovoltaic power stations and suspension bridges are frequently built along the coast and riverbanks. Due to geological issues, the foundation design is a crucial element in ensuring the stability of a building. For example, in photovoltaic power station projects, the main structure needs to be reinforced. To provide a reliable foundation, piles are driven into the water, and then foundation piers are constructed at the pile heads. These foundation piers serve as the installation base for the cables and bear significant stress.

[0003] In existing technology, after the pile foundation construction is completed, a casting form is installed at the pile head, and then concrete is poured. After curing, the formwork is removed to form individual pile head foundations suspended above the water. The wet operation on site is affected by the waterfront environment, the transportation distance of the formwork and cement is relatively long, the construction speed is slow, and the concrete is cured in a high humidity environment, resulting in a slow drying speed. Utility Model Content

[0004] The technical problem to be solved by this utility model is the inconvenience of constructing pile head foundations in the prior art.

[0005] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0006] A casting mold for pile head foundations, comprising an outer mold and an inner mold.

[0007] The outer mold is composed of a front template, a left template, a rear template, and a right template connected in sequence. The front template, the left template, the rear template, and the right template are all composed of a panel and a transverse reinforcing rib and a longitudinal reinforcing rib fixed to the back of the panel. Side plates are fixed to the periphery of the panel. The side plates at both ends of the front template and the rear template are in contact with the panels of the left template and the right template. Bolt holes are provided on the contact surfaces, and fixing bolts are installed in the bolt holes.

[0008] Pre-embedded steel bars are arranged at equal intervals in the horizontal and vertical directions and are placed inside the mold cavity of the outer mold.

[0009] The inner mold is set inside the outer mold. The lower end of the inner mold is aligned with the bottom elevation of the outer mold, and the upper end of the inner mold is higher than or equal to the top elevation of the outer mold. The diameter of the inner mold is matched with the diameter of the pile head.

[0010] The reinforcing bar pre-reservation cylinder is symmetrically set based on the inner mold. One end abuts against the outer wall of the inner mold, and the other end abuts against the inner wall of the outer mold. The two symmetrical reinforcing bar pre-reservation cylinders are set coaxially.

[0011] Compared with the prior art, the advantages of this utility model with the above structure are:

[0012] The mold provided by this utility model is used for prefabricating concrete foundations in the factory, enabling the pile head foundations to be prefabricated in batches, thereby saving on-site wet work and achieving the effect of rapid installation.

[0013] As a preferred option, a further technical solution to the above structure is:

[0014] The inner mold consists of a lower mold body and an upper mold body. The upper mold body is cylindrical, and the lower mold body is conical. The diameter of the lower opening of the cone matches the outer diameter of the pile head, and the diameter of the upper opening is larger than the outer diameter of the pile head.

[0015] The beneficial effects obtained from the above features are as follows: This embodiment facilitates the arrangement of pre-embedded steel bars through the split design of the inner mold, and the conical design facilitates mold removal.

[0016] At least two sets of reinforcing bar pre-reserved cylinders are provided on a certain horizontal plane at the lower part of the inner mold; an anchor block is fixedly inserted into the end of the reinforcing bar pre-reserved cylinder that abuts against the inner mold, and the anchor block is connected to the inner mold; a conical block is fitted on the outside of the end of the reinforcing bar pre-reserved cylinder that abuts against the outer mold, and the outer end of the conical block is tightly abutted against the outer mold.

[0017] The beneficial effects obtained from the above features are: the structure has good stability of the pre-reserved reinforcing cylinder, does not leak grout, and ensures the formation of a continuous multi-reinforced insertion hole.

[0018] The lower mold body has a horizontal steel bar positioning groove at the upper end, and the upper mold body has a longitudinal steel bar positioning groove at the lower end.

[0019] The beneficial effects obtained from the above features are: in this embodiment, the limiting groove is matched with the size of the reinforcing bar, thereby stabilizing the reinforcing bar and reducing pores to avoid grout leakage.

[0020] The lower mold body is composed of several arc-shaped mold pieces. Connecting plates are fixed to the left and right ends of the arc-shaped mold pieces. The connecting plates of adjacent arc-shaped mold pieces are in contact with each other. Bolt holes are provided on the connecting plates, and fastening bolts are installed in the bolt holes.

[0021] The beneficial effects obtained from the above features are: the inner mold is easy to install and disassemble, and the connecting plate also strengthens the inner mold and prevents deformation.

[0022] The upper mold body has a first connecting ear at its lower end and a second connecting ear at its upper end. The first connecting ear and the second connecting ear are fixedly connected by bolts.

[0023] The beneficial effect obtained from the above features is that the connection between the upper and lower mold bodies in this example has good stability.

[0024] To solve the aforementioned technical problem, the concrete foundation of the pile head foundation made by the aforementioned casting mold includes a concrete body. Two mold holes are symmetrically arranged in the middle of the concrete body, and a sling lug is provided between the two mold holes. A lifting ring is provided on the outside of the two mold holes. The mold hole is conical, with its lower diameter matching the outer diameter of the pile head and its upper diameter being larger than the outer diameter of the pile head. A pre-embedded reinforcing bar retaining cylinder is embedded in the lower part of the concrete body, penetrating the mold hole. The reinforcing bar is inserted into the pre-embedded cylinder and rests on the top surface of the concrete of the pile head.

[0025] Compared with the prior art, the advantages of this utility model with the above structure are:

[0026] The conical mold hole design reduces the resistance to the foundation's movement as it sinks along the pile head. The small gap between the lower end of the mold hole and the pile head surface prevents grout leakage during secondary pouring. The reinforcing steel bars limit the elevation of the concrete foundation above the pile head, facilitating construction. The lifting rings make it easy to move and transport the concrete foundation. The sling lugs facilitate the installation of cables. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the mold arrangement for this utility model;

[0029] Figure 3 This is a schematic diagram of the arrangement of the pre-reinforced reinforcing bar sleeve of this utility model;

[0030] Figure 4 This is a structural diagram of the pre-embedded steel bar positioning groove on the upper and lower mold bodies of this utility model;

[0031] Figure 5 This is a diagram of an embodiment of the inner mold of this utility model;

[0032] Figure 6 This is a schematic diagram of the pile head concrete foundation structure of this utility model;

[0033] Figure 7 This is a schematic diagram of the installation structure of the pile head concrete foundation of this utility model.

[0034] In the diagram: 1. Outer formwork; 101. Right formwork; 102. Front formwork; 2. Inner formwork; 201. Upper formwork; 202. Lower formwork; 3. Embedded reinforcing bars; 4. Lifting cable lugs; 5. Lifting rings; 6. Reinforcing bar pre-reserved cylinders; 7. Conical block; 8. Anchor block; 9. Horizontal reinforcing bar positioning groove; 10. Longitudinal reinforcing bar positioning groove; 11. Second connecting lug; 12. Connecting plate; 13. Fastening bolts; 14. First connecting lug; 15. Concrete body; 16. Formwork hole; 17. Bearing reinforcing bars; 18. Pile head. Detailed Implementation

[0035] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0036] See Figures 1 to 7 The casting mold for the 18-pile foundation provided by this utility model includes:

[0037] The outer mold 1 is composed of a front template 102, a left template, a rear template, and a right template 101 connected in sequence. The front template 102, the left template, the rear template, and the right template 101 are all composed of a panel and a transverse reinforcing rib and a longitudinal reinforcing rib fixed to the back of the panel. Side plates are fixed to the periphery of the panel. The side plates at both ends of the front template 102 and the rear template are in contact with the panels of the left template and the right template 101. Bolt holes are provided on the contact surfaces, and fixing bolts are installed in the bolt holes.

[0038] Pre-embedded steel bars 3 are arranged at equal intervals in the horizontal and vertical directions and are placed inside the mold cavity of the outer mold 1;

[0039] Inner mold 2 is set inside outer mold 1. The lower end of inner mold 2 is aligned with the bottom elevation of outer mold 1, and the upper end of inner mold 2 is higher than or equal to the top elevation of outer mold 1. The diameter of inner mold 2 is adapted to the diameter of pile head 18.

[0040] The reinforcing bar pre-reservation cylinder 6 is symmetrically arranged based on the inner mold 2. One end abuts against the outer wall of the inner mold 2, and the other end abuts against the inner wall of the outer mold 1. The two symmetrical reinforcing bar pre-reservation cylinders 6 are coaxially arranged.

[0041] The foundation of the pile head 18, made by the casting mold of the above-mentioned pile head 18 foundation, includes a concrete body 15. Two mold holes 16 are symmetrically arranged in the middle of the concrete body 15. A sling lug 4 is provided between the two mold holes 16, and a lifting ring 5 is provided on the outside of the two mold holes 16. The mold hole 16 is conical, and its lower diameter matches the outer diameter of the pile head 18, while its upper diameter is larger than the outer diameter of the pile head 18. A reinforcing bar reserved cylinder 6 is pre-embedded in the lower part of the concrete body 15, which passes through the mold hole 16. A reinforcing bar 17 is inserted in the reinforcing bar reserved cylinder 6, and the reinforcing bar 17 rests on the top surface of the concrete of the pile head 18.

[0042] The pile head 18 foundation provided by this utility model is used for pile foundations and is installed on the top of the pile head 18. The lower end of the pile foundation is located in the soil or riverbed. In this utility model, the number of inner molds 2 is determined according to the number of foundation piles in each group. In engineering, each foundation is generally required to be on the same horizontal plane. It is necessary to provide a survey of the top surface elevation of the pile foundation. When constructing the foundation, the elevation of the pre-reserved reinforcing bar cylinder 6 is positioned according to the top surface elevation of the pile foundation. The reinforcing bar 17 should be a thick steel bar that is compatible with the pre-reserved reinforcing bar cylinder 6 and can be inserted from the left side to the right side of the concrete body 15. The reinforcing bar 17 is embedded in the pile head 18.

[0043] The mold provided by this utility model is a factory-produced mold, eliminating the need for on-site foundation pouring and enabling mass prefabrication of foundations in the factory. During on-site installation, the foundation is hoisted onto the pile head 18, and after the mold hole 16 is aligned with the pile head 18, the foundation is slowly lowered. When the load-bearing steel bar 17 is placed on top of the pile head 18, the concrete pile head 18 foundation is in place.

[0044] If the inner mold 2 is large, the mold hole 16 will be large, which will easily lead to grout leakage during secondary pouring. If the inner mold 2 is small, the mold hole 16 will be small, and the friction between the inner wall of the mold hole 16 and the surface of the pile head 18 will be large, affecting the foundation installation. In order to facilitate the basic installation and dismantling, this new design utilizes a conical mold hole 16. Specifically, the inner cavity of the inner mold 2 is conical, with its lower diameter matching the outer diameter of the pile head 18 and its upper diameter being larger than the outer diameter of the pile head 18. The lower end of the mold hole 16 can make tighter contact with the pile head 18, and the small contact area effectively reduces frictional resistance. The small gap in the structure at the lower end of the mold hole 16 makes it less prone to grout leakage during secondary concrete pouring.

[0045] As an option, the inner mold 2 consists of a lower mold body 202 and an upper mold body 201, with the lower mold body 202 being tapered. Optionally, the upper end of the lower mold body 202 is provided with a horizontal rebar positioning groove 9, and the lower end of the upper mold body 201 is provided with a longitudinal rebar positioning groove 10. The split design of the inner mold 2 facilitates the arrangement of the foundation pre-embedded rebars 3, and the use of appropriately sized horizontal rebar positioning grooves 9 and longitudinal rebar positioning grooves 10 prevents grout leakage.

[0046] In general engineering projects, it is required that all or a certain area of ​​foundations be on the same horizontal plane. However, there may be some elevation error during pile foundation construction. This construction error can be corrected by positioning the pre-embedded steel bars 3 in the inner formwork 2, thereby ensuring that the top surface elevation is consistent after the foundation is placed on the pile head 18. To achieve this, optionally, at least two sets of reinforcing bar pre-reserved cylinders 6 are set at a certain horizontal plane at the lower part of the inner formwork 2; an anchor block 8 is fixedly inserted into the end of the reinforcing bar pre-reserved cylinder 6 that abuts against the inner formwork 2, and the anchor block 8 is fixed to the inner formwork 2; a conical block 7 is fitted on the outside of the end of the reinforcing bar pre-reserved cylinder 6 that abuts against the outer formwork 1, and the outer end of the conical block 7 is tightly abutted against the outer formwork 1. The anchor block 8 is positioned according to the measured elevation of the pile head 18 on site. The reinforcing bar pre-reserved cylinder 6 can be a PVC pipe, which is inserted into the anchor block 8 for fixation during mold installation, and the mating surface can be wrapped with plastic cloth to prevent adhesion.

[0047] As an alternative, the lower mold body 202 is composed of several arc-shaped mold pieces, with connecting plates 12 fixed to the left and right ends of the arc-shaped mold pieces. The connecting plates 12 of adjacent arc-shaped mold pieces fit together, and bolt holes are provided on the connecting plates 12, in which fastening bolts 13 are installed. This example uses a multi-piece combined inner mold 2 structure, which makes it easier to install and disassemble. The connecting plates 12 also have the effect of strengthening the inner mold 2 and preventing deformation.

[0048] To prevent the inner mold 2 from deforming under the lateral pressure of the concrete, an internal support frame can be installed in the axial direction of the inner mold 2.

[0049] As an alternative, the lower end of the upper mold body 201 is provided with a first connecting ear 14, and the upper end of the lower mold body 202 is provided with a second connecting ear 11. The first connecting ear 14 and the second connecting ear 11 are fixedly connected by bolts. In this example, the connection between the upper and lower mold bodies 202 has good stability.

[0050] The beneficial effects of this utility model are:

[0051] 1) Factory prefabrication of pile head foundations is achieved through customized molds, enabling batch prefabrication and saving on-site wet work, thus achieving rapid installation; 2) The conical mold hole design reduces the frictional resistance of the inner wall of the mold hole to the pile head, facilitating installation; 3) The small gap between the lower end of the mold hole and the pile head surface prevents grout leakage during secondary pouring; 4) The installation height of the reinforcing steel bars is adjusted to ensure the elevation accuracy of the concrete foundation in the project; 5) A mold hole cavity for secondary pouring is reserved to ensure the stability of the connection between the pile head and the foundation; 6) Lifting lugs and cable hangers are pre-embedded on the foundation for hoisting and installation.

[0052] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A casting mold for pile head foundations, comprising an outer mold (1) and an inner mold (2), characterized in that: The outer mold (1) is composed of a front template (102), a left template, a rear template and a right template (101) connected in sequence. The front template (102), the left template, the rear template and the right template (101) are all composed of a panel and a transverse reinforcing rib and a longitudinal reinforcing rib fixed to the back of the panel. The panel is fixed with a side plate. The side plates at both ends of the front template (102) and the rear template are in contact with the panel of the left template and the right template (101). The contact surface is provided with bolt holes and fixing bolts are installed in the bolt holes. Pre-embedded steel bars (3) are arranged at equal intervals in the horizontal and vertical directions and are placed in the cavity of the outer mold (1); The inner mold (2) is set inside the outer mold (1). The lower end of the inner mold (2) is aligned with the bottom elevation of the outer mold (1), and the upper end of the inner mold (2) is higher than or equal to the top elevation of the outer mold (1). The diameter of the inner mold (2) is matched with the diameter of the pile head (18). The pre-reserved reinforcement cylinder (6) is symmetrically set based on the inner mold (2). One end abuts against the outer wall of the inner mold (2), and the other end abuts against the inner wall of the outer mold (1). The two symmetrical pre-reserved reinforcement cylinders (6) are coaxially set.

2. The casting mold for the pile head foundation according to claim 1, characterized in that: The inner mold (2) consists of an upper mold body (201) and a lower mold body (202). The upper mold body (201) is cylindrical; the lower mold body (202) is conical. The diameter of the lower opening of the cone matches the outer diameter of the pile head (18), and the diameter of the upper opening is greater than the outer diameter of the pile head (18).

3. The casting mold for the pile head foundation according to claim 1, characterized in that: At least two sets of the reinforcing bar pre-reserved cylinder (6) are provided on a certain horizontal plane at the lower part of the inner mold (2); an anchor block (8) is fixedly inserted into the end of the reinforcing bar pre-reserved cylinder (6) that abuts against the inner mold (2), and the anchor block (8) is fixedly connected to the inner mold (2); a conical block (7) is fitted on the outside of the end of the reinforcing bar pre-reserved cylinder (6) that abuts against the outer mold (1), and the outer end of the conical block (7) is tightly abutted against the outer mold (1).

4. The casting mold for the pile head foundation according to claim 2, characterized in that: The lower mold (202) is provided with a horizontal steel bar positioning groove (9) at the upper end, and the upper mold (201) is provided with a longitudinal steel bar positioning groove (10) at the lower end.

5. The casting mold for the pile head foundation according to claim 2, characterized in that: The lower mold body (202) is composed of several arc-shaped mold pieces. The left and right ends of the arc-shaped mold pieces are fixed with connecting plates (12). The connecting plates (12) of adjacent arc-shaped mold pieces are in contact with each other. Bolt holes are provided on the connecting plates (12), and fastening bolts (13) are installed in the bolt holes.

6. The casting mold for the pile head foundation according to claim 1, characterized in that: The lower end of the upper mold body (201) is provided with a first connecting ear (14), and the upper end of the lower mold body (202) is provided with a second connecting ear (11). The first connecting ear (14) and the second connecting ear (11) are fixedly connected by bolts.

7. The pile head concrete foundation fabricated using the casting mold for the pile head foundation as described in claim 1, characterized in that: The concrete body (15) includes two symmetrical mold holes (16) in the middle of the concrete body (15), with a sling lug (4) between the two mold holes (16) and a lifting ring (5) on the outside of the two mold holes (16); the mold hole (16) is conical, with its lower diameter matching the outer diameter of the pile head (18) and its upper diameter being larger than the outer diameter of the pile head (18); a reinforcing bar pre-embedded cylinder (6) penetrating the mold hole (16) is embedded in the lower part of the concrete body (15), and a reinforcing bar (17) is inserted in the reinforcing bar pre-embedded cylinder (6), with the reinforcing bar (17) resting on the top surface of the concrete of the pile head (18).

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