A method for constructing a pile head of a cast-in-situ bored pile

Abstract

The application discloses a construction method of a pile head of a bored filling pile, and comprises the following steps: welding supporting steel bars on a pile steel reinforcement cage; sleeving a sleeve ring on each pile steel bar head of the pile steel reinforcement cage; welding the current steel reinforcement cage with a lower steel reinforcement cage, installing the current steel reinforcement cage and positioning, before the positioning, performing a release agent treatment on the periphery and surface of a supporting part; pouring concrete in the supporting part and completing vibration; after reaching an age, starting to dig soil, cleaning a soil layer around a column, and removing the supporting part, and pulling out the supporting part from the pile steel bar head.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering construction, in particular to a technology for removing pile heads during concrete bored pile construction, and more particularly to a drilling and grouting pile head construction method. BACKGROUND

[0002] During the construction of the concrete bored pile of the foundation engineering in the building engineering construction, a two-meter or so paste layer is formed on the pile head, and the pile head reinforcement is generally anchored into the foundation slab concrete with a length of 700-1200 removed, and in addition to the cooperation of the equipment, more manual labor is required.

[0003] During the removal of the reinforcement head, there are many problems in the pile head removal, and it takes more than two weeks for a flow section, and the force-bearing reinforcement is sometimes damaged or even broken during the removal and chiseling, which brings safety hazards to the pile quality.

[0004] At the same time, the waste of concrete material is more serious, and the formed construction waste is time-consuming and laborious to handle, and a lot of land is occupied in the disposal of construction waste, and the removal and disposal costs are very high, and the waste of land and material is more serious, and under the background of the green low-carbon policy, this construction method needs to be improved urgently.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a drilling and grouting pile head construction method, which can prevent too much paste of concrete by covering the pile head with a supporting part, fixing the anchored reinforcement through the supporting part, and protecting the anchored reinforcement, and does not need to be removed and chiseled after the pile head is removed.

[0007] To solve the above technical problems, the basic idea of the technical scheme of the present application is:

[0008] A drilling and grouting pile head construction method, the method comprising the following steps:

[0009] Step 1: welding a supporting reinforcement on the pile reinforcement cage;

[0010] Step 2: sleeving a sleeve ring on each pile reinforcement head of the pile reinforcement cage;

[0011] Step 3: welding the present reinforcement cage with the lower reinforcement cage, installing the present reinforcement cage and positioning, and treating the supporting part periphery and surface with a release agent before positioning;

[0012] Step 4: pouring concrete in the supporting part and vibrating to complete;

[0013] Step 5: After reaching the age, start digging, column around the soil cleaning, and the support part is removed from the pile steel head, the outer diameter of the support part is 600-1000mm, the same as the pile head diameter, the inner diameter is 100-300mm, and the vibration pump is vibrated according to the requirements, the diameter of the round hole is 10-25mm, and the height is 600-1200mm (determined by the anchoring length of the pile head), the diameter of the support steel is 10-14mm, the length of the support steel is 250-350mm, and the support steel is placed on both sides of the pile head steel hoop, the sleeve ring is mainly made of rubber material, which is conical, the upper diameter is 20-30mm, the lower diameter is 30-60mm, the hollow inner diameter is 10-25mm, which is 3-5mm larger than the diameter of the steel head, and the height is about 50mm, which can be easily removed.

[0014] In the preferred embodiment of any of the above solutions, the support steel is welded on the pile steel cage, comprising:

[0015] Step 11: when the last section of the pile steel cage is constructed;

[0016] Step 12: weld the support steel of the support part first;

[0017] Step 13: pass the pile steel head through the support part.

[0018] In the preferred embodiment of any of the above solutions, the sleeve ring is conical.

[0019] In the preferred embodiment of any of the above solutions, the support part is removed from the pile steel head, comprising:

[0020] Step 51: when the pile head is cleaned to the top elevation position, use the excavator to push the column head formed by the paste;

[0021] Step 52: the pile head is disconnected at the minimum section of the upper opening of the support part, or disconnected with a pneumatic pick;

[0022] Step 53: remove the floating paste on the surface of the support part, and pull it out by hand;

[0023] Step 54: before removing the support part, first cut a circle along the bottom surface of the support part with a cutting blade machine, and break the core concrete of the support part with a pneumatic pick;

[0024] Step 55: shake the support part until the support part is pulled out from the pile steel head, clean the surface of the pile head, and achieve the construction requirements of the next process.

[0025] In the preferred embodiment of any of the above solutions, the support part has a hole in the middle, and the hole has a round hole in the outer periphery, the sleeve ring has a through hole in the middle, the pile steel head passes through the through hole, and the sleeve ring passes through the round hole.

[0026] In a preferred embodiment of any of the above solutions, the support portion is integrally formed with the channel and the round hole.

[0027] In a preferred embodiment of any of the above schemes, the method for constructing the pile head of a bored pile further includes a protective layer disposed in the duct and attached to the inner wall of the support.

[0028] In a preferred embodiment of any of the above solutions, a repair section is provided inside the support section. When the support section cracks, liquid in the repair section flows out to bond the cracked part of the support section.

[0029] In a preferred embodiment of any of the above solutions, the repair part includes a cavity, a balloon, and a separator layer. Multiple separator layers are disposed within the support part, and a cavity is formed between two separator layers. A balloon is installed within the cavity, and the end of the balloon is connected to the separator layer. When the support part cracks, liquid in the repair part flows out to bond the cracked area of ​​the support part. The repair part includes a cavity, a balloon, and separator layers. Multiple separator layers are disposed within the support part, and a cavity is formed between two separator layers. A balloon is installed within the cavity, and the end of the balloon is connected to the separator layer. The repair part is spaced apart from the circular hole. The balloon includes a silicone shell and a liquid adhesive encapsulated inside the silicone shell. When the silicone shell is torn by external force, the silicone shell ruptures, allowing the liquid adhesive to flow out.

[0030] In a preferred embodiment of any of the above solutions, the repair part is spaced apart from the circular hole 11.

[0031] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0032] By adding a support section over the pile head, the anchored steel bars can pass through the support section and be fixed to it. This can prevent excessive concrete slurry from overflowing, protect the anchored steel bars, and eliminate the need for chiseling after the pile head is removed.

[0033] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0035] Figure 1 is a schematic diagram of the pile head construction method of the bored filling pile of the application.

[0036] Figure 2 is a schematic diagram of the support part and pile reinforcement head installation of the control method of the pile head construction method of the application.

[0037] Figure 3 is a schematic diagram of the sleeve structure of the control method of the pile head construction method of the application.

[0038] Figure 4 is a schematic diagram of the support part structure of the control method of the pile head construction method of the application.

[0039] Figure 5 is a schematic diagram of the repair part and round hole distribution on the support part of the control method of the pile head construction method of the application.

[0040] In the figure: 1, support part; 2, sleeve; 3, support reinforcement; 4, pile reinforcement head; 5, protective layer; 11, round hole; 12, hole; 13, cavity; 14, balloon body; 15, separation layer.

[0041] It should be noted that the drawings and the written description are not intended to limit the scope of the inventive concept in any way, but are merely to illustrate the inventive concept to those skilled in the art. DETAILED DESCRIPTION

[0042] In order to enable persons skilled in the art to better understand the application scheme, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the application.

[0043] It is to be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or indirectly on the other element with intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element with intervening elements.

[0044] In the description of the present application, it needs to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0046] The following embodiments of the present application take the pile head construction method of bored filling pile as an example to explain the scheme of the present application in detail, but this embodiment cannot limit the protection scope of the present application. Embodiment

[0047] As shown in Figures 1 to 5 The present application provides a pile head construction method of bored filling pile, the method comprising the following steps:

[0048] Step 1: welding support reinforcement 3 on pile reinforcement cage;

[0049] Step 2: sleeving sleeve ring 2 on each pile reinforcement head 4 of the pile reinforcement cage;

[0050] Step 3: welding the present section reinforcement cage with the lower reinforcement cage, installing the present section reinforcement cage and positioning, before positioning, carrying out release agent treatment on the periphery and surface of the supporting part 1;

[0051] Step 4: pouring concrete in the supporting part 1 and vibrating to complete;

[0052] Step 5: after reaching the age, starting to dig soil, cleaning the soil layer around the column, and removing the supporting part 1, pulling out the supporting part 1 from the pile reinforcement head 4.

[0053] In the pile head construction method of the bored filling pile, the supporting part is covered on the pile head, the anchoring steel bars pass through the supporting part and are fixed with the supporting part, the excessive concrete bleeding is prevented, the anchoring steel bars are protected, and the pile head does not need to be chiseled after being removed. In the application, the outer diameter of the supporting part 1 is 600-1000 mm, the same as the diameter of the pile head, and the inner diameter is 100-300 mm, which is determined according to the vibration pump vibration requirements. The diameter of the round hole is preferably 10-25 mm. The height is preferably 600-1200 mm (determined according to the anchoring length of the pile head). The supporting steel bars 3 are used for supporting the supporting part 1. The supporting steel bars 3 are made of on-site waste steel bars. The diameter of the supporting steel bars 3 is preferably 10-14 mm. The length of the supporting steel bars 3 is preferably 250-350 mm. The supporting steel bars 3 are arranged on both sides of the pile head steel bar hoop and are welded on the pile head hoop at the lower end of the supporting part 1, and do not need to be removed. In the embodiment of the application, the sleeve ring 2 is conical, so that the sleeve ring 2 can be conveniently arranged in the supporting part 1 when the sleeve ring 2 is arranged in the supporting part 1. The sleeve ring 2 is mainly made of rubber and is conical. The upper diameter is 20-30 mm. The lower diameter is 30-60 mm. The hollow inner diameter is 10-25 mm, which is 3-5 mm larger than the diameter of the steel bar head. The height is preferably about 50 mm, which can facilitate removal.

[0054] As shown in Figures 1 to 5 the pile steel bar cage is welded with the supporting steel bars 3, which comprises:

[0055] Step 11: when the last section of the pile steel bar cage is constructed;

[0056] Step 12: the supporting steel bars 3 of the supporting part 1 are welded first;

[0057] Step 13: the pile steel bar head 4 is arranged through the supporting part 1.

[0058] As shown in Figures 1 to 5 the supporting part 1 is removed, and the supporting part 1 is pulled out from the pile steel bar head 4, which comprises:

[0059] Step 51: when the pile head is cleaned to the top elevation position, the pile head is pushed by the excavator to form a pile head;

[0060] Step 52: the pile head is disconnected at the minimum section of the upper opening of the supporting part 1, or is disconnected by using a pneumatic pick;

[0061] Step 53: the floating concrete on the surface of the supporting part 1 is removed, and the supporting part 1 is pulled out by hand;

[0062] Step 54: before the supporting part 1 is removed, a cutting blade machine is used to cut a circle along the bottom surface of the supporting part 1, and the concrete in the core of the supporting part 1 is broken by using a pneumatic pick;

[0063] Step 55: shake the support part 1 until the support part 1 is pulled out from the pile reinforcement head 4, clean the pile head surface concrete, and reach the construction requirements of the next process.

[0064] As shown in Figures 1 to 5 The support part 1 is provided with a hole 12 in the middle, and the hole 12 has a round hole 11 around the circumference, the sleeve ring 2 has a through hole 21 in the middle, the pile reinforcement head 4 passes through the through hole 21, and the sleeve ring 2 passes through the round hole 11, and the support part 1 is integrally formed with the hole 12 and the round hole 11.

[0065] In the pile head construction method of the drilling and pouring pile, the support part 1 is a pre-embedded module, which can be made of various materials, such as scrap tires, high-density extruded plates, air tire molds, and waste wood molds, etc., and is mainly made of economic and green materials. 5-10 round holes with a diameter of 16-25mm are formed on the pre-embedded module according to the site conditions, the pile reinforcement head 4 passes through the pre-embedded module, and a high-elasticity sleeve ring is used to cover the pile reinforcement head 4. The sleeve ring is conical with a small upper part and a large lower part, which is convenient for fixing the pre-embedded module and the pile reinforcement head 4. A hole with a diameter of 100-300mm is formed at the center position of the pre-embedded module, which is used for pouring and vibrating the concrete of the last pile reinforcement cage, and at the same time, the pile is formed. During the excavation process, when the soil layer around the pile is excavated, the pile head is gently pushed by the excavator, and the pile head is disconnected at the upper level of the module. Then the pre-embedded module is removed, and the embedded concrete core pile is removed, which is very simple.

[0066] As shown in Figures 1 to 5 The drilling and pouring pile pile head construction method further comprises a protective layer 5 arranged in the hole 12 and attached to the inner wall of the support part 1.

[0067] In the drilling and pouring pile pile head construction method, a protective layer 5 made of rubber material can be attached to the inner wall of the support part 1, and a release agent can be brushed on the outer side of the protective layer 5, which can facilitate the cleaning of the concrete.

[0068] As shown in Figures 1 to 5As shown, the support part 1 is provided with a repair part, when the support part 1 cracks, the liquid in the repair part flows out to achieve the bonding of the cracking part of the support part 1, the repair part comprises a cavity 13, a balloon body 14 and a separation layer 15, the separation layer 15 is provided with a plurality of separation layers 15, the separation layer 15 is arranged in the support part 1, and a cavity 13 is formed between two separation layers 15, the balloon body 14 is installed in the cavity 13, and the end of the balloon body 14 is connected with the separation layer 15, and the repair part is arranged apart from the round hole 11, wherein the balloon body 14 comprises a silica gel shell and a liquid adhesive wrapped inside the silica gel shell, when the silica gel shell is torn by external force, the silica gel shell is broken, so that the liquid adhesive flows out.

[0069] In the pile head construction method of the bored filling pile, when it is necessary to break the pile head, the soil is excavated and the soil layer around the column is cleaned, and when the cleaning reaches the top elevation position of the pile head, the pile head is broken at the minimum cross section of the upper opening of the embedded module by a shovel or a pneumatic pick; the floating slurry on the surface of the embedded module is removed by a pneumatic pick, and a cutting blade is used to cut around the bottom surface of the embedded module before the embedded module is pulled out and removed; the concrete in the core of the embedded module is broken by a pneumatic pick, and the embedded module is shaken until it is pulled out from the pile reinforcement head; the surface concrete of the pile head is cleaned and flattened to meet the construction requirements of the next process.

[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for constructing the pile head of a bored pile, characterized in that, The method includes the following steps: Step 1: Weld supporting reinforcing bars (3) onto the pile reinforcement cage, including: Step 11: During the construction of the last section of the pile reinforcement cage; Step 12: First weld the supporting steel bars (3) of the support part (1); Step 13: Pass the pile reinforcement head (4) through the support (1); Step 2: Place a collar (2) on each pile steel bar head (4) of the pile steel cage. The collar (2) is conical. Step 3: Weld this section of the steel cage to the lower layer of steel cage, install this section of the steel cage and put it in place. Before putting it in place, treat the periphery and surface of the support part (1) with a release agent. Step 4: Pour concrete into the support section (1) and vibrate it to complete the process; Step 5: After reaching the required age, start excavating the soil, cleaning the soil around the pile, and dismantling the support (1) and pulling the support (1) out of the pile reinforcement head (4); The support part (1) has a channel (12) in the middle and a round hole (11) on the outer periphery of the channel (12). The collar (2) has a through hole (21) in the middle. The pile steel head (4) passes through the through hole (21) and the collar (2) passes through the round hole (11). The support part (1) has a repair part. When the support part (1) cracks, the liquid in the repair part flows out to bond the cracked part of the support part (1). The repair part includes a cavity (13), a balloon (14) and a partition layer (15). Multiple partition layers (15) are provided. Multiple partition layers (15) are provided in the support part (1), and a cavity (13) is formed between two partition layers (15). The balloon (14) is installed in the cavity (13), and the end of the balloon (14) is connected to the partition layer (15).

2. The method for constructing the pile head of a bored pile according to claim 1, characterized in that, The dismantling of the support (1), pulling the support (1) from the pile reinforcement head (4), includes: Step 51: When clearing to the top elevation of the pile head, use an excavator to push the pile head formed by the grouting. Step 52: The pile head is broken at the point of minimum cross-section at the top of the support section (1), or broken with the help of a pneumatic pick; Step 53: Remove the laitance from the surface of the support section (1) and pull it out by hand; Step 54: Before dismantling the support (1), use a cutting blade machine to cut around the bottom of the support (1), and use a pneumatic hammer to break the concrete inside the support (1). Step 55: Shake the support (1) until it is pulled out from the pile reinforcement head (4), clean the concrete on the pile head surface and level it to meet the construction requirements of the next process.

3. The method for constructing the pile head of a bored pile according to claim 2, characterized in that, The support (1) is integrally formed with the channel (12) and the round hole (11).

4. The method for constructing the pile head of a bored pile according to claim 3, characterized in that, It also includes a protective layer (5), which is disposed in the channel (12) and attached to the inner wall of the support (1).

5. The method for constructing the pile head of a bored pile according to claim 4, characterized in that, The repair part is spaced apart from the circular hole (11). The outer diameter of the support part (1) is 600-1000mm and the inner diameter is 100-300mm. The diameter of the circular hole is 10-25mm and the height is 600-1200mm. The diameter of the supporting steel bar is 10-14mm and the length of the supporting steel bar is 250-350mm. The supporting steel bar is placed on both sides of the pile head steel bar hoop. The upper diameter of the collar is 20-30mm and the lower diameter is 30-60mm. The hollow inner diameter is 10-25mm, which is 3-5mm larger than the diameter of the steel bar head. The height is 50mm.

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