Pile head pouring formwork structure

Abstract

The utility model discloses a pile head pouring formwork structure, and belongs to the technical field of building construction structures. Comprising steel bars, a pouring support mold and a filling assembly. The reinforcing steel bars are parts exceeding the upper end surfaces of the cast-in-place piles in the cast-in-place piles; a lower section is arranged above the upper end face of the cast-in-place pile, and a pile head elevation casting space is arranged above the lower section; a pouring support mold is arranged outside the pile head elevation pouring space; a filling assembly is arranged in the middle of the pile head elevation pouring space and the lower section; the filling assembly is used for enabling the middle of the poured pile head to be of a hollow structure. The hollow pile head is only provided with one layer of concrete wall, and only the concrete wall needs to be chiseled away; the pile head breaking process is time-saving and labor-saving; in addition, the hollow pile head saves concrete raw materials.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building construction structure, and specifically relates to a pile head pouring formwork structure. BACKGROUND

[0002] The reinforced concrete bored pile is a pile foundation formed by pouring concrete in a hole directly on a site pile position and then pouring concrete or placing a reinforcement cage in the hole; compared with the hammering method of sinking into a pile, the construction noise and vibration are much smaller; and the diameter can be much larger than that of a prefabricated pile; various foundations can be used.

[0003] The part above the bored pile elevation is called a pile head, which usually contains floating slurry, bottom sediment, soil particles and other impurities falling during the drilling process; in order to ensure the strength of the concrete, after the pouring is completed and the concrete is coagulated, the pile body, that is, the pile head part, needs to be chipped off, which is called pile head breaking; the pile head part is the same as the pile body part, which is poured by solid concrete and contains steel inside, and the overall strength is also relatively high, so the breaking process is very difficult, and the concrete needs to be chipped off gradually and the steel needs to be interrupted; the whole pile head breaking process is time-consuming and labor-consuming; and the pile head is poured by solid concrete and then broken, which wastes materials. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of pile head pouring formwork structure, and the pile head poured based on the pile head pouring formwork structure is hollow structure;Compared with the pile head of solid structure, hollow pile head can also be used to realize pile head carrying sediment, to ensure the stress effect of bored pile;Hollow pile head only has one layer of concrete wall, and only needs to chip off concrete wall;Pile head breaking process saves time and effort;In addition, hollow pile head saves concrete raw materials.

[0005] In order to achieve the above technical purpose, the utility model is realized by the following technical scheme:

[0006] A pile head pouring formwork structure, comprising: a reinforcing bar, a pouring support mold, and a filling assembly.

[0007] The reinforcing bar is the part of the reinforcing bar in the bored pile that exceeds the upper end surface of the bored pile.

[0008] The upper end surface of the bored pile is set as a lower index section, and the lower index section is set as a pile head elevation pouring space.

[0009] The pouring support mold is arranged outside the pile head elevation pouring space.

[0010] The filling assembly is arranged centrally in the pile head elevation pouring space and the lower index section, and is used to make the middle part of the pile head formed by pouring hollow.

[0011] Preferably, the reinforcing steel bars are bound by the spacing stirrups in equal intervals.

[0012] Preferably, the depth of the lower index section is set to 0.5-1m; when pouring the cast-in-place pile, the pouring is stopped when the upper end surface of the cast-in-place pile is 0.5-1m away from the pile head, thereby forming the lower index section.

[0013] Preferably, the filling assembly is set in several groups, and is set in series from the upper end surface of the cast-in-place pile to the upper index position of the pile head in a stacking manner from bottom to top.

[0014] Preferably, the filling assembly is externally coated with an external isolation film; the external isolation film can prevent the filling assembly from being directly adhered to the concrete after the pile head is poured and solidified, and can facilitate the removal of the filling assembly.

[0015] Preferably, the shape of the filling assembly is set to one of a rectangular body, a sphere, and a cylinder.

[0016] Preferably, the filling assembly is set to a solid filling structure or an air bag type filling structure.

[0017] Preferably, the filling assembly is set to a rectangular body structure air bag.

[0018] An air inlet valve is arranged on the upper surface of the air bag, and the air bag is inflated by the air inlet valve to be expanded.

[0019] A plurality of buckles are arranged at the edge of the upper surface of the air bag, and a plurality of straps are arranged at the edge of the lower surface of the air bag.

[0020] Preferably, a counterweight is arranged at the bottom of the air bag.

[0021] Preferably, the lowermost filling assembly is bound and fixed to the reinforcing steel bar or the binding stirrup.

[0022] The beneficial effects of the utility model are as follows:

[0023] The utility model provides a pile head pouring formwork structure, in addition to reinforcing steel bars and pouring support mould, a filling assembly is arranged in the middle of the formwork structure; the filling assembly is arranged, so that the poured and formed concrete pile head is a hollow structure in the middle; the purpose of meeting the pile head residue carrying and guaranteeing the stress effect of the lower cast-in-place pile is achieved; meanwhile, when the pile head is broken, only the concrete side wall exists, so that the pile head is easily chiseled, time and labor are saved; and the hollow part of the pile head saves the concrete raw material.

[0024] The filling assembly adopts an air bag, and the air bag can be used after being inflated; after use, the air is discharged, and the air bag can be used again after being arranged and recycled.

[0025] A counterweight is placed at the bottom of the air bag. The counterweight makes the stacking and connection of the air bags from bottom to top more stable and prevents the air bags from floating when pouring concrete. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional schematic diagram of the pile head casting formwork structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the formwork structure for pile head casting according to this utility model;

[0029] Figure 3 This is a schematic diagram of the cross-sectional planar structure of the cast-in-place pile head of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the inflatable bag of this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the inflatable bag of this utility model, in which a counterweight is set at the bottom.

[0032] In the attached diagram, the structural names represented by each number are as follows:

[0033] 1. Cast-in-place pile; 2. Lower section; 3. Reinforcing bar; 4. Tie stirrups; 5. Casting support mold; 6. Filling component; 601. Outer isolation membrane; 7. Ground; 8. Pile head; 801. Hollow structure; 9. Inflatable bag; 901. Inflatable valve; 902. Binding buckle; 903. Binding strap; 904. Counterweight block. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Example 1: A pile head casting formwork structure, comprising: steel bars 3, casting support mold 5, and filling components 6;

[0036] like Figure 1 or Figure 2As shown, the casting of pile 1 is carried out normally in the drilled pile hole. When the casting reaches 0.5m from the lower mark of the pile head, the casting is paused. At this time, the space between the upper surface of pile 1 and the lower mark of the pile head is designated as lower mark segment 2. Lower mark segment 2 becomes part of the pile head after it is cast and formed later. The purpose is to ensure a better transition between the pile head and the pile body itself in the pile hole, and to avoid excessive interference to the pile body below during the breaking process of the pile head. The part above lower mark segment 2 is designated as the casting space for the pile head elevation.

[0037] Several reinforcing bars 3 are evenly spaced within the cast-in-place pile 1, and ties 4 are fixedly attached to the reinforcing bars 3 at equal intervals. The reinforcing bars 3 and ties 4 improve the seismic resistance and load-bearing strength of the cast-in-place pile. The reinforcing bars 3 inside the cast-in-place pile 1 extend beyond the upper end face of the cast-in-place pile 1 and continue to extend from the lower section 2 to the pile head elevation pouring space. This part of the reinforcing bars 3 that extends directly from the cast-in-place pile 1 will also be used in the subsequent pile head pouring. Similarly, several sets of ties 4 are still fixed at equal intervals on the reinforcing bars 3 used in the pile head part to strengthen the overall support of the reinforcing bars.

[0038] Since the pouring space for section 2 and the pile head elevation is located in the original excavated pile hole, the side wall of the pile hole will block and shape the concrete when pouring concrete; the pile head can be formed by directly pouring concrete; after the pile head concrete has solidified, before it is necessary to break the pile head, it is only necessary to clean up the soil around the pile head to expose the pile head before it can be broken.

[0039] Another situation is as follows: Figure 2 As shown, it's possible that only section 2 is located inside the pile hole, while the pouring space for the pile head elevation is exposed above the pile hole opening. Since there's no shielding around this pouring space, it's impossible to mold and contain the uncured concrete during pouring. Therefore, as... Figure 1 or Figure 2 As shown, a casting support mold 5 needs to be set outside the casting space at the pile head elevation. The casting support mold 5 can be made of two semi-circular arc-shaped support templates. The two semi-circular arc-shaped support templates are aligned and then fixed together with bolts or other fixing methods. The hollow space is exactly the casting space for the pile head. The inner edge of the casting support mold 5 should be aligned with the edge of the pile hole as much as possible, so that the pile head will be aligned with the cast-in-place pile body. After the casting support mold 5 is set up, concrete can be poured to cast the pile head. After the pile head has solidified, the casting support mold 5 can be removed to break the pile head 8.

[0040] Whether the pile head is poured directly into the pile hole as described above, or the pile head is poured after setting up the pouring support mold 5, the final formed pile head is a solid concrete structure with steel reinforcement inside, resulting in high overall strength. However, it is time-consuming and laborious to break it, and a large amount of concrete solid needs to be removed.

[0041] like Figure 1 As shown in Figure 2, in this embodiment, a filling component 6 is set in the lower section 2 of the pile head pouring and the pile head elevation pouring space; the filling component 6 is centrally located in the lower section 2 and the pile head elevation pouring space, that is, in the middle of the reinforcing bar 3. The filling component 6 is set from the upper end face of the cast-in-place pile 1 from bottom to top all the way to the upper end of the pile head elevation pouring space; the filling component 6 forms a vacant position in the lower section 2 and the pile head elevation pouring space, and concrete is poured for pile head pouring. After the concrete solidifies, the filling component 6 is removed, as shown in Figure 2. Figure 3 As shown, the pile head 8 formed at this time has a hollow structure in the middle, with only concrete sidewalls; thus, when breaking the pile head 8, only the concrete sidewalls need to be removed; in addition, since the pile head 8 itself needs to be broken, the hollow structure of the pile head 8 is not only easier to break than the solid structure pile head, but also saves concrete raw materials in the hollow structure.

[0042] Since both the lower section 2 of the pile head casting and the casting space at the pile head elevation have a certain depth, the integrated filling component 6 is difficult to place or remove. Therefore, it is best to set the filling component 6 into multiple groups, starting from the upper end face of the cast-in-place pile 1 and stacked in series from bottom to top, with each group of filling components 6 connected and fixed to each other.

[0043] The filling component 6 should not be isolated by template support, because in addition to the inconvenience of template support during disassembly and assembly, the filling component 6 needs to be removed from the hollow structure 801 of the pile head, and the hollow structure 801 itself has limited space, which further increases the difficulty of disassembly and assembly of template support.

[0044] Therefore, the filling component 6 should preferably be lightweight, have a space-occupying function, and be easy to install and disassemble; the shape should preferably be a regular rectangle, sphere, or cylinder to avoid irregular shapes causing the inner wall of the hollow structure of the pile head to solidify and jam the filling component, making the filling component 6 more difficult to disassemble and remove.

[0045] This embodiment uses cylindrical foam filling components. The cylindrical foam filling components have a regular shape and smooth outer walls. The volume of a single cylindrical foam filling component is controlled between 0.1 and 0.3 cubic meters. The cylindrical foam filling components are lightweight. If they are stuck together during disassembly, the foam can be directly broken into small pieces for removal. When installing the foam filling components, the bottom foam filling component is placed at the upper end face of the grouting pile. Then, a steel bar or a weighted iron rod can be inserted into the middle of the bottom foam component. The remaining foam filling components are then aligned and inserted into the steel bar in sequence to achieve the stacking and series connection of multiple foam filling components.

[0046] As a preferred embodiment, to minimize the risk of the concrete adhering to the outer wall of the foam filling component after solidification, thus making it difficult to remove the filling component; such as Figure 2 As shown, an outer isolation film 601 can be wrapped around the outer wall of the foam filling component; the outer isolation film 601 separates the concrete from the foam filling component; in this way, the foam filling component does not come into direct contact with the concrete, avoiding adhesion between the two; and the foam filling component can be more easily removed.

[0047] Example 2: Based on Example 1, the filling component 6 is set as a foam filling component. This makes it lighter during installation and easier to disassemble; it can even be broken down into small pieces for destructive disassembly. However, precisely because of its light weight, a steel bar or other weight is inserted in the middle of the foam filling component to prevent it from floating during concrete pouring. The steel bar connects the foam filling components from bottom to top, and also serves as a counterweight to prevent the foam filling component from floating during concrete pouring. Furthermore, if the foam counterweight component is not intact upon removal, it cannot be reused.

[0048] like Figure 4 As shown, in this embodiment, the filling component 6 is set in the form of an air bag 9; the air bag 9 can also be set as a cylindrical, spherical or rectangular structure; in this embodiment, an air bag 9 with a rectangular structure is set.

[0049] An inflation valve 901 is provided on the upper surface of the air bag 9, and a sealing plug is provided on the inflation valve 901. Air can be inflated into the air bag 9 through the inflation valve 901, causing it to expand and play a role in filling and occupying space in the lower section 2 and the pile head elevation pouring space. Several buckles 902 are provided at the edge of the upper surface of the air bag 9. Correspondingly, several straps 903 are provided at the edge of the lower surface of the air bag 9, and snaps are provided on the straps 903. Multiple sets of air bag 9 filling components are arranged sequentially from bottom to top from the upper end face of the cast-in-place pile 1. The straps 903 on the lower surface of the upper air bag 9 are threaded onto the buckles 902 on the upper surface of the lower air bag 9, and then the straps 903 are connected to the buckles 902 through their own snaps. In this way, multiple sets of air bags 9 are connected to each other.

[0050] Since the air bag 9 itself is also relatively light, it is necessary to consider that the air bag 9 may float during concrete pouring; therefore, the bottom air bag 9 needs to be tied and fixed to the reinforcing bar or ties in the lower section 2 with steel wire or iron wire to pull the bottom air bag 9, while the other air bags 9 are interconnected; this can prevent the air bag 9 from floating.

[0051] Similarly, to avoid direct contact between the air bag 9 and the concrete, an outer isolation film 601 is wrapped around the surface of the air bag 9 to separate the air bag 9 from the concrete and prevent direct adhesion between the air bag 9 and the concrete. When disassembling the air bag 9, the air inside the air bag 9 can be vented through the inflation valve 901 to facilitate disassembly and storage. The air bag 9 will not be damaged during disassembly and can be reused.

[0052] Example 3: Based on Example 2, in Example 2, the bottommost inflatable bag 9 is tied and fixed to prevent all the upper inflatable bags 9 from floating.

[0053] As a preferred embodiment, to further ensure the stability of the air bag 9 during concrete pouring, such as... Figure 5 As shown, in this embodiment, a counterweight 904 is provided at the bottom of the air bag 9; when the air bags 9 are stacked and connected in series from bottom to top, the counterweight 904 in the upper air bag 9 will exert downward pressure on the lower air bag 9; making the filling component 6 composed of air bags 9 sink more stably; and it is not easy for large gaps to appear between each air bag 9; when pouring concrete, it is ensured that it will not float.

[0054] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A formwork structure for pile head casting, characterized in that, include: Reinforcing steel, casting support formwork, and infill components; The reinforcing bars are the portion of the reinforcing bars inside the cast-in-place pile that extends beyond the upper end face of the pile. The upper end face of the cast-in-place pile is designated as the lower section, and the area above the lower section is designated as the pouring space for the pile head elevation. A casting support mold is set outside the casting space at the pile head elevation. A filling component is centrally located within the pouring space at the pile head elevation and within the lower section; the filling component is used to make the middle part of the pile head formed by grouting hollow.

2. The pile head casting formwork structure according to claim 1, characterized in that, Several rings of tying stirrups are evenly spaced from bottom to top on the steel bars.

3. The pile head casting formwork structure according to claim 1, characterized in that, The depth of the subscript segment is set to 0.5 to 1 m.

4. The pile head casting formwork structure according to claim 1, characterized in that, The filling components are arranged in several groups, and are stacked and connected in series from bottom to top on the upper end face of the cast-in-place pile to the upper mark position of the pile head.

5. The pile head casting formwork structure according to claim 1, characterized in that, The filling component is externally covered with an isolation membrane.

6. The formwork structure for pile head casting according to claim 1, characterized in that, The shape of the filling component is set to one of a rectangle, a sphere, or a cylinder.

7. The formwork structure for pile head casting according to claim 1, characterized in that, The filling component is configured as a solid filling structure or an inflatable bag filling structure.

8. The formwork structure for pile head casting according to claim 7, characterized in that, The filling component is configured as an inflatable bag with a rectangular structure; An inflation valve is provided on the upper surface of the inflatable bag, through which air is injected into the bag to inflate it. Several buckles are provided at the edge of the upper surface of the inflatable bag; several straps are provided at the edge of the lower surface of the inflatable bag.

9. The formwork structure for pile head casting according to claim 8, characterized in that, A counterweight is installed at the bottom of the inflatable bag.

10. The pile head casting formwork structure according to claim 1, characterized in that, The bottommost filling component is tied and fixed to the reinforcing bar or the tie stirrup.

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