Novel foundation reinforcing pile head regulator

Abstract

The utility model relates to a novel foundation reinforcement pile head regulator which comprises a pile foundation, a raft plate, a pile top design elevation position and a main rib arranged on the inner side of the pile foundation, a cushion layer is arranged on the periphery of the side of the pile foundation, and a high-strength grouting material layer is arranged on the top of the pile foundation. A base is placed in the center of the top face of the high-strength grouting material layer, structural adhesive adheres to the surface of the high-strength grouting material layer on the top of the pile foundation and the base, the base of the rigidity adjuster is fixed through the high-strength grouting material layer and the structural adhesive, the rigidity adjuster is arranged on the upper side of the base in a spot welding mode, and therefore the purposes of saving materials, shortening the construction period and reducing the engineering cost can be achieved; and the quality control is relatively easy because the traditional secondary pouring of the concrete anchoring base needs about 24 hours for demolding, and the high-strength grouting material only needs about 1 hour to have the initial strength, so that the construction efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to a novel foundation reinforcement pile head adjuster, and pertains to the field of building construction technology. Background Technology

[0002] With the acceleration of urbanization and the vigorous development of infrastructure construction, various large-scale buildings, transportation hubs and other projects are emerging one after another, which puts forward higher requirements for foundation reinforcement technology. Moreover, with the continuous promotion of controllable stiffness pile raft foundation in the province, the construction of traditional stiffness adjustment devices requires a large amount of secondary pouring of materials to anchor the base. For the construction site, this consumes a lot of resources and takes up construction time. At the same time, the dimensions of the secondary pouring membrane plate are also required to be precise, making it difficult to control the construction quality.

[0003] Meanwhile, traditional secondary concrete anchoring bases require approximately 24 hours before demolding, resulting in slow demolding efficiency.

[0004] Furthermore, during the connection process between the pile head and the regulator, problems such as voids and gaps are prone to occur. These quality hazards can affect the effect of foundation reinforcement and the use of the regulator, increasing the later maintenance costs. Therefore, it is necessary to propose a new type of foundation reinforcement pile head regulator for improvement. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of foundation reinforcement pile head adjuster to solve the problems mentioned in the background art.

[0006] This utility model is achieved through the following technical solution: a novel foundation reinforcement pile head, including a pile foundation, a raft slab, a design elevation of the pile top, and main reinforcement bars located on the inner side of the pile foundation. A cushion layer is provided around the pile foundation, and a high-strength grouting material layer is provided on the top of the pile foundation. A base is placed at the center of the top surface of the high-strength grouting material layer, and structural adhesive is bonded between the surface of the high-strength grouting material layer on the top of the pile foundation and the base. A stiffness adjuster is spot-welded to the upper side of the base.

[0007] A further improvement is that a side guard plate and a top cover plate are installed on the top of the pile foundation to form a cavity, and the stiffness adjuster and the base are sealed inside the cavity.

[0008] A further improvement is that the top height of the side guard plate is slightly higher than the stiffness adjuster, and the upper cover plate is spot-welded to the side guard plate, while the bottom surface of the upper cover plate abuts against the stiffness adjuster.

[0009] A further improvement is that the upper cover plate is equipped with a grouting pipe that communicates with the cavity. The top of the grouting pipe extends upward and is higher than the upper side of the raft plate. A waterproof plug can be inserted into the inner side of the top of the grouting pipe.

[0010] A further improvement is that a sand-filling layer is distributed around the outer perimeter of the pile foundation, and the sand-filling layer is located on the upper side of the cushion layer, keeping the top level.

[0011] A further improvement is that a waterproof layer is laid on the upper side of the cushion layer and the sand filling layer, and the raft board is located on the upper side of the waterproof layer.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This utility model uses a high-strength grout layer and structural adhesive to fix the base of the stiffness adjuster, which can save materials, shorten the construction period, and reduce project costs. It also makes quality control relatively easy, because the traditional secondary concrete anchor base needs about 24 hours to be demolded, while the high-strength grout only needs about 1 hour to have initial strength, which greatly improves construction efficiency.

[0014] Traditional construction requires a secondary pouring section with a height of approximately 300mm-350mm, while the pouring height of the high-strength grout layer of this invention is only 50mm. Moreover, the high-strength grout has the characteristics of micro-expansion and self-compacting, which can ensure quality without vibration, thus saving more materials.

[0015] Furthermore, the use of structural adhesive in this application fixes the base, and the base can be spot-welded to the stiffness adjuster, which optimizes the installation of the stiffness adjuster, reduces unnecessary construction steps, and shortens the construction cycle. At the same time, the independent cavity formed by the side guard plate and the top cover plate can also protect the stiffness adjuster, ensuring that concrete or other foreign objects cannot hinder the stiffness adjuster from functioning. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] In the diagram: 1. Pile foundation; 2. Main reinforcement; 3. Pile top design elevation; 4. High-strength grouting material layer; 5. Stiffness adjuster; 6. Base; 7. Side guard plate; 8. Top cover plate; 9. Grouting pipe; 10. Waterproof plug; 11. Structural adhesive; 12. Cushion layer; 13. Sand filling layer; 14. Waterproof layer. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figure 1This utility model provides a technical solution for a novel foundation reinforcement pile head adjuster: it includes a pile foundation 1, a raft slab 13, a pile top design elevation 3, and main reinforcement 2 located on the inner side of the pile foundation 1. A concrete cushion layer 10 is poured around the pile foundation 1, and a high-strength grouting material layer 4 is provided on top of the pile foundation 1. This high-strength grouting material layer 4 is made of A60 high-strength grouting material and has self-compacting micro-expansion properties, achieving the design strength without vibration, thus providing reliable foundation support for foundation reinforcement. Specifically, the process of pouring the A60 high-strength grouting material requires preparing a membrane plate with the same diameter as the pile foundation 1 to ensure the pouring... During construction, the stability of the membrane plate is ensured to prevent the diameter of the poured section from deviating from the pile diameter by more than 2cm, which would affect the subsequent installation of the side protection plate. The formwork uses economical iron sheets instead of traditional steel formwork, which greatly reduces material costs. Furthermore, a base 51 is placed at the center of the top surface of the high-strength grouting material layer 4. Before placement, structural adhesive 9 can be applied in advance. The structural adhesive 9 is waterproof. Then, structural adhesive 9 is applied along the outer perimeter, so that the top of the pile foundation 1 and the base 51 are bonded together by the structural adhesive 9. A stiffness adjuster 5 is spot-welded to the upper side of the base 51. This can greatly improve work efficiency and shorten the construction cycle during construction.

[0021] The top of the pile foundation 1 is also equipped with a side guard plate 6 and a top cover plate 7 to form a cavity, and the stiffness adjuster 5 and the base 51 are enclosed in the cavity. Before the building settlement stabilizes, this ensures that concrete or other foreign objects cannot hinder the function of the stiffness adjuster 5, thus protecting the stiffness adjuster 5 and improving its durability. The top of the side guard plate 6 is slightly higher than the stiffness adjuster 5, and the top cover plate 7 is spot-welded to the side guard plate 6, while the bottom surface of the top cover plate 7 abuts against the stiffness adjuster 5. Furthermore, the top cover plate 7 is equipped with a grouting pipe 8 that communicates with the cavity. The top of the grouting pipe 8 extends upward and is higher than the upper side of the raft slab 13 to facilitate subsequent grouting construction and to avoid affecting the inner cavity of the side guard plate 6 and the top cover plate 7. A waterproof plug 81 can be inserted into the inner side of the top of the grouting pipe 8 to prevent other impurities from entering the cavity through the grouting pipe 8.

[0022] Furthermore, fine sand is used to backfill and compact the portion of the foundation 1 that is lower than the level of the cushion layer 10, forming a sand filling layer 11. The sand filling layer 11 is located on the upper side of the cushion layer 10 and its top is kept level, allowing the sand filling layer 11 and the cushion layer 10 to work together to evenly transfer the load of the superstructure to the pile foundation and the surrounding foundation. In addition, the compressibility of fine sand is low, which can reduce settlement differences and avoid structural cracking caused by uneven settlement. Moreover, fine sand material has low cost and good economic efficiency.

[0023] A waterproof layer 12 is laid on the upper side of the cushion layer 10 and the sand filling layer 11, and the raft 13 is located on the upper side of the waterproof layer 12. The waterproof layer 12 is located on the cushion layer 10 and the sand filling layer 11 and plays a role in preventing water seepage.

[0024] Furthermore, the top height of the side guard plate 6 is slightly higher than that of the stiffness adjuster 5, and the upper cover plate 7 is spot-welded to the side guard plate 6, making the structure more stable. The bottom surface of the upper cover plate 7 abuts against the stiffness adjuster 5, which allows for a larger contact surface, forming an overall support. The space arrangement is reasonable, and when the grouting pipe 8 is not being grouted, a waterproof plug 81 can be inserted into the inner side of its top for temporary sealing.

[0025] The installation and construction of foundation reinforcement pile head adjusters can be divided into the following steps:

[0026] Step 1: According to the attached diagram, excavate about 100mm around the top side of pile foundation 1 to a depth of about 100mm. If it is necessary to pour the cushion layer first, a brick formwork can be built around the side of pile foundation 1 to reserve the operating space. Then cut the pile to 5cm below the design elevation of pile top 3 of pile foundation 1. Excavate and pour the cushion layer 10 around the side of the pile as required.

[0027] Step 2: Cut off the longitudinal reinforcement of the pile body that is higher than the elevation, fix the casting template, and pour A60 high-strength grout to the design elevation 3 of the pile top; before pouring, the casting template can be made of iron sheet with better economic efficiency, but since the iron sheet is easy to deform during the pouring process, sand can be filled around the pile side to form a sand filling layer 11 to fix the iron sheet.

[0028] Step 3: After the high-strength grouting material layer 4 at the top of the pile foundation 1 has solidified and formed and has initial strength, demolding can be carried out; or the iron sheet can be cut directly to the design elevation 3 at the top of the pile, and the base 51 of the stiffness adjuster 5 can be placed on the top of the pile, ensuring that the center of the base 51 coincides with the center of the pile, and then the base can be bonded to the top of the pile using structural adhesive 9 with waterproof effect.

[0029] Step 4: The base 51 of the stiffness adjuster 5 is generally equipped with a positioning bolt at its center. The stiffness adjuster 5 has a corresponding hole on its lower side. Simply place the hole of the stiffness adjuster 5 into the positioning bolt on the base 51 to ensure that the center coincides. This makes the alignment relatively simple. After placement, spot weld the stiffness adjuster 5 and the base 51 together, with a spot weld interval of about 3cm.

[0030] Step 5: Install the top cover plate 7 and the side guard plate 6, and spot weld the side guard plate 6 to the top cover plate 7 (spot weld once every 5cm). Since the height of the side guard plate 6 is slightly higher than the stiffness adjuster 5, if the sand filling and template fixing measures are adopted in the second step, some sand should be dug out at this time to ensure the installation quality of the side guard plate 6.

[0031] Step 6: Backfill the portion of the pile that is excavated below the height of the cushion layer 10 with fine sand and smooth it with cement mortar. After completion, the subsequent waterproof layer 12 and raft slab 13 can be constructed.

[0032] Step 7: Install grouting pipe 8 on the top cover plate 7. The grouting pipe 8 extends upward to 20cm above the top surface of the raft slab 13. The opening of the grouting pipe 8 is temporarily sealed by the waterproof plug 81. If the grouting pipe 8 is located under the shear wall or column, an adapter needs to be made to ensure that the grouting pipe 8 is exposed.

[0033] Step 8: When constructing the waterproof layer 12 and the raft slab 13, in order to prevent the grouting pipe 8 from being damaged or tilted during the construction of the raft slab 13 reinforcement, the grouting pipe 8 can be installed after the raft slab 13 reinforcement is tied. However, the interface position of the grouting pipe 8 on the upper cover plate 7 should be reserved in advance and should not be covered by the reinforcement.

[0034] It should be noted that this utility model is a novel foundation reinforcement pile head adjuster, which mainly improves the above-mentioned structure. The functions, components and structures not mentioned can be implemented by using existing components and structures that can achieve the corresponding functions.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A new type of pile head regulator for foundation reinforcement, comprising a pile foundation (1), a raft (13), a design elevation (3) at the top of the pile, and a main reinforcement (2) arranged inside the pile foundation (1), characterized in that: a cushion layer (10) is arranged around the side of the pile foundation (1), and a high-strength grouting layer (4) is arranged on the top of the pile foundation (1); a base (51) is placed at the center of the top surface of the high-strength grouting layer (4), and the surface of the high-strength grouting layer (4) on the top of the pile foundation (1) is bonded with a structural adhesive (9) and the base (51); and a stiffness regulator (5) is spot-welded to the upper side of the base (51). The top of the pile foundation (1) is also provided with a side guard plate (6) and an upper cover plate (7) to form a cavity, and the stiffness regulator (5) and the base (51) are sealed in the cavity. The top of the side guard plate (6) is slightly higher than the stiffness regulator (5), and the upper cover plate (7) is spot-welded to the side guard plate (6), while the bottom surface of the upper cover plate (7) abuts against the stiffness regulator (5). The upper cover plate (7) is provided with a grouting pipe (8) that communicates with the cavity, the top of the grouting pipe (8) extends upward and is higher than the upper side of the raft (13), and a waterproof plug (81) can be inserted into the inside of the top of the grouting pipe (8).

2. A new type of pile head regulator for ground reinforcement according to claim 1, characterized in that: A sand filling layer (11) is distributed around the outer periphery of the pile foundation (1), and the sand filling layer (11) is located on the upper side of the cushion layer (10) and maintains a flat top.

3. A new type of pile head regulator for ground reinforcement according to claim 2, characterized in that: A waterproof layer (12) is laid on the upper side of the cushion layer (10) and the sand filling layer (11), and the raft (13) is located on the upper side of the waterproof layer (12).

4. A new type of pile head regulator for ground reinforcement according to claim 3, characterized in that: ​ 5. A new type of pile head regulator for ground reinforcement according to claim 1, characterized in that: ​ 6. A new type of pile head regulator for ground reinforcement according to claim 5, characterized in that: ​

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