Grouting pipe for engineering pile grouting and reinforcement cage comprising grouting pipe
By using annular or spiral grouting sections and multiple grouting ports in engineering piles, the problem of insufficient bearing capacity of a single pile in the deep sand layer is solved, and a more uniform The slurry distribution and higher pile bearing capacity ensure the stability and safety of construction.
Patent Information
- Application Number
- CN202420495574.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-03-13
AI Technical Summary
In deep sand layer scenarios, the conventional grouting pipe structure leads to a low bearing capacity and pull-out resistance of the single pile of engineering piles, which cannot effectively improve the overall stability and bearing capacity of the foundation, and is prone to affect the grouting effect due to concrete blockage.
Design a grouting pipe for engineering piles, including connected conveying sections and annular or spiral grouting sections, with multiple grouting ports facing the outside on the grouting section, and adopt a one-way valve structure and glue. Adhesive seals, the conveying section is a steel pipe, the grouting section is an aluminum-plastic water pipe, and a grouting pipe is installed on the outside of the steel cage to improve grouting efficiency and effect.
Through the design of annular or spiral grouting sections and multiple grouting ports, the slurry is evenly distributed in the sand layer, enhancing the binding force between piles and soil, improving the bearing capacity and pull-out resistance of single piles, ensuring grouting efficiency and Effects, avoid blockage problems and meet construction needs under complex geological conditions.
Smart Images
Figure CN222294992U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, and specifically relates to a grouting pipe used for engineering pile grouting and a steel cage containing the grouting pipe. Background Art
[0002] Engineering pile grouting is a common foundation treatment method, mainly used to increase the bearing capacity and stability of the foundation. During the construction process, by injecting a specific slurry, such as cement slurry, into the grouting pipe, the density and strength of the pile are increased, thereby improving the bearing capacity and pull-out resistance of the pile.
[0003] From a background perspective, foundation engineering is a vital part of construction engineering, and pile foundation, as an important method of foundation treatment, has been widely used in construction engineering. With the continuous development and increasing requirements of construction engineering, the requirements for pile foundations are becoming higher and higher, especially under complex geological conditions, which puts higher requirements on the bearing capacity and pull-out resistance of pile foundations.
[0004] However, in conventional pile foundation grouting construction structures, the grouting pipe is usually a vertical pipe extending to the bottom of the pile's steel cage or a specific elevation on the pile side. However, in some special geological conditions, especially in scenarios where the pile is applied to deep sand layers, when the diameter of the engineering pile is relatively small and the length is long, the ordinary grouting construction structure has limited effect on improving the bearing capacity and pull-out resistance of a single pile, and cannot substantially improve the overall stability and bearing capacity of the foundation. In addition, in severe cases, even after pouring concrete, most of the grouting pipes are blocked by concrete, and grouting cannot be performed normally, affecting the overall stress of the pile foundation.
[0005] Therefore, to address this problem, it is necessary to research and develop new grouting pipes and the steel cages containing them to improve the bearing capacity and pull-out resistance of engineering piles in special scenarios such as deep sand layers, and to ensure the safety and stability of construction projects. Utility Model Content
[0006] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose a grouting pipe for grouting of engineering piles and a steel cage containing the same, so as to solve the problem that the vertical pipe structure of the conventional grouting pipe is easily used in the engineering pile structure with a small pile diameter and a long pile length when applied to the scene of deep sand layer, which easily leads to low single pile bearing capacity and single pile pull-out resistance.
[0007] To achieve this purpose, the utility model adopts the following technical solutions:
[0008] A grouting pipe for engineering pile grouting comprises a conveying section and a grouting section connected to each other. The outlet end of the conveying section is connected to the inlet end of the grouting section. The grouting section is annular or spiral and is provided with a plurality of grouting ports facing outwards.
[0009] The preferred technical solution of the utility model is that the grouting ports are arranged in three directions along the radial direction, namely, the upper oblique grouting port, the middle grouting port and the lower oblique grouting port.
[0010] The preferred technical solution of the utility model is that a one-way valve structure is arranged at the grouting port.
[0011] The preferred technical solution of the utility model is that it also includes an adhesive tape, on which a plurality of sealing members covering the grouting ports are provided, and the sealing members are fixed to the grouting pipe by the adhesive effect of the adhesive tape.
[0012] An optimal technical solution of the utility model is that the sealing member is a thumbtack.
[0013] The preferred technical solution of the utility model is that the conveying section is a first steel pipe with an outer diameter of φ32mm×a wall thickness of 2.5mm, and the steel pipes are connected by electric welding using a threaded joint or a second steel pipe with an outer diameter of φ42mm×a wall thickness of 3.0mm.
[0014] The preferred technical solution of the utility model is that the grouting section is an aluminum-plastic water pipe with an inner diameter of φ25mm.
[0015] The utility model also provides a steel cage, comprising a steel cage body and a grouting pipe of the above technical solution, one end of the grouting pipe is connected to the steel cage body, and the grouting section is arranged around the outside of the steel cage body.
[0016] The preferred technical solution of the utility model is that the conveying section is located outside the steel cage body.
[0017] The preferred technical solution of the utility model is that more than two grouting pipes are provided.
[0018] Beneficial effects of the utility model:
[0019] The utility model proposes a grouting pipe for grouting of engineering piles. By providing a ring-shaped or spiral grouting section and a plurality of grouting ports facing outward on the grouting section, the ring-shaped or spiral grouting section is more suitable for the situation of thick sand layers compared with the conventional vertical pipe structure. Such a design enables the slurry to be more evenly distributed in the sand layer around the pile body, fills the pores in the sand layer, enhances the bonding force between the pile and the soil, and improves the bearing capacity and pull-out resistance of the single pile. In addition, the grouting section is provided with a plurality of grouting ports facing outward. The design of these grouting ports further enhances the grouting effect. They can evenly spray the slurry into the soil around the pile body, covering a wider range, making the grouting more uniform and sufficient, thereby enhancing the bonding force between the pile and the soil, and improving the overall bearing capacity and pull-out resistance of the pile. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0021] Figure 1 It is a schematic diagram of the construction auxiliary structure for engineering pile grouting of the utility model;
[0022] Figure 2 It is a schematic diagram of a grouting pipe used for engineering pile grouting of the utility model;
[0023] Figure 3 is a schematic diagram of a grouting section with a one-way valve structure;
[0024] Figure 4 It is a schematic cross-sectional view of the grouting port of the grouting section.
[0025] In the figure:
[0026] 1- trough body; 2- steel cage body; 3- grouting pipe; 31- conveying section; 32- grouting section; 4- grouting port; 41- upward grouting port; 42- middle grouting port; 43- downward grouting port; 5- adhesive tape; 6- seal; 7- ground. DETAILED DESCRIPTION
[0027] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0028] In this embodiment, a certain project is undertaken, requiring engineering piles with a diameter of φ700, an effective pile length of 41m, and a bearing layer of strongly weathered rock. Based on the geological survey report, the piling conditions of adjacent construction sites, and construction experience, the engineering piles are designed to have a small diameter and a long length, and the bearing layer is located more than 70m underground. The sand layer at the construction site is thick, making construction difficult.
[0029] like Figure 1-4As shown, for the above application scenarios, this embodiment is used for the construction auxiliary structure of engineering pile grouting, wherein, due to the excessive length of the structure, some structural sections are omitted for display, including a trough 1 excavated on the ground 71, a steel cage body 2 and a grouting pipe 3, the steel cage body 2 is located in the trough 1, one end of the grouting pipe 3 is connected to the steel cage body 2, and the grouting section 32 is arranged around the outside of the steel cage body 2. Among them, the grouting pipe 3 includes a connected conveying section 31 and a grouting section 32, the outlet end of the conveying section 31 is connected to the inlet end of the grouting section 32, the grouting section 32 is annular or spiral, and the grouting section 32 is provided with a plurality of grouting ports 4 facing outward. In this embodiment, the grouting section 32 is spiral, and a plurality of grouting ports 4 are also spirally arranged and facing the outside of the steel cage body 2. First, the scheme adopts the design of a connected conveying section and a grouting section. The conveying section and the grouting section are connected to form an integral structure. This design allows the slurry to be smoothly transported from the conveying section to the grouting section, ensuring the smooth progress of the grouting process, thereby improving the grouting efficiency. Secondly, the grouting section adopts an annular or spiral structure. Compared with the conventional vertical pipe structure, the annular or spiral grouting section is more suitable for the situation of thick sand layers. This design allows the slurry to be more evenly distributed in the sand layer around the pile body, filling the pores in the sand layer, enhancing the bonding force between the pile and the soil, and improving the bearing capacity and pull-out resistance of the single pile. In addition, the grouting section is provided with a number of grouting ports facing outward. The design of these grouting ports further enhances the grouting effect. They can evenly spray the slurry into the soil around the pile body, covering a wider range, making the grouting more uniform and sufficient, thereby enhancing the bonding force between the pile and the soil, and improving the overall bearing capacity and pull-out resistance of the pile. In summary, this technical solution creatively solves the problem of insufficient single pile bearing capacity and pull-out resistance caused by the vertical pipe structure of conventional grouting pipes in thick sand layers through the connected conveying section and grouting section, the annular or spiral grouting section structure, and the outward-facing grouting port design. This solution can improve grouting efficiency and optimize grouting effects, thereby ensuring the stability and safety of engineering piles under complex geological conditions.
[0030] Preferably, the grouting pipe 3 is set to more than two, and the grouting sections 32 of the grouting pipe 3 are respectively located at different sand layer positions of the trough body 1. In the present embodiment, two grouting pipes are provided. By setting two grouting pipes and placing their grouting sections at different sand layer positions, grouting can be more comprehensively performed, and the pores in the sand layers of different depths and different properties can be fully filled, thereby improving the grouting effect. Further, the grouting port 4 is divided into a first grouting port group and a second grouting port group, and the grouting ports 4 in the first grouting port group and the second grouting port group are respectively arranged in an annular or spiral shape. In the present embodiment, the grouting port 4 is divided into a first grouting port group and a second grouting port group, and the above-mentioned grouting port groups are respectively located on different grouting pipes and are arranged in a spiral shape. By dividing the grouting ports into the first grouting port group and the second grouting port group, and adopting a spiral arrangement in each group, the number of grouting ports can be effectively increased, and more evenly distributed around the pile. This allows the slurry to be more fully injected into the sand layer around the pile, increasing the density of the sand layer and the bonding strength with the pile.
[0031] Preferably, the conveying section 31 is located outside the steel cage body 2. Placing the conveying section outside the steel cage can reduce obstacles inside the steel cage, making the arrangement of the grouting pipe more flexible. Such a design can avoid the limitations of the internal space of the steel cage, which is conducive to more effective injection of slurry into the soil around the pile body. In addition, in the above preferred technical solution, the conveying section 31 and the grouting section 32 are arranged outside the steel cage, which can replace the original protective block that needs to be arranged outside the steel cage, and further optimize the construction structure.
[0032] Preferably, a one-way valve structure is provided at the grouting port 4. By providing a one-way valve structure, it is possible to effectively prevent the possibility of slurry entering from the grouting port and causing blockage when pouring concrete, thereby ensuring that the subsequent grouting process proceeds normally. Figure 3 As shown, specifically, an adhesive tape 5 is provided on the grouting pipe 3, and a plurality of seals 6 covering the grouting port 4 are provided on the adhesive tape 5, and the seals 6 are fixed on the grouting pipe 3 by the adhesive action of the adhesive tape 5. The provision of the adhesive tape and the seal simplifies the construction process, reduces the workload of manual adjustment and inspection, and improves the construction efficiency. The construction personnel only need to place the seal on the grouting port and fix it with the adhesive tape, which is easy to operate. When grouting, since the viscosity of the tape is not too strong, the seal 6 is first flushed with high-pressure clean water for unplugging, and then grouting can be performed according to the construction requirements.
[0033] Preferably, the seal 6 is a thumbtack. As a common fixing material, thumbtacks are easily available in the market and are suitable for grouting pipes of different diameters and materials. This design has strong versatility and adaptability and can meet different engineering requirements. As a common and economical fixing material, thumbtacks have low cost. Compared with other complex fixing structures, using thumbtacks as seals can reduce construction costs and improve construction economy.
[0034] like Figure 4 As shown, preferably, the grouting ports 4 are arranged in three directions along the radial direction, namely, the oblique upper grouting port 41, the middle grouting port 42 and the oblique lower grouting port 43. The grouting ports are arranged in three directions along the radial direction, namely, the oblique upper, the middle and the oblique lower directions, so as to realize comprehensive grouting of the soil around the pile body. Such a design can ensure that the slurry forms a uniform slurry around the pile body, fills the pores of the soil body, enhances the bonding force between the pile and the soil body, and improves the bearing capacity and pull-out resistance of the pile.
[0035] Preferably, the conveying section 31 is a first steel pipe with an outer diameter of φ32mm and a wall thickness of 2.5mm, and the steel pipes are connected by electric welding using a threaded joint or a second steel pipe with an outer outer diameter of φ42mm and a wall thickness of 3.0mm. The steel pipe used as the material of the conveying section has high strength and stability, can withstand large pressure and tension, and ensures smooth conveying of the slurry. The threaded joint or electric welding connection can ensure that the connection of the conveying section is firm and not easy to loosen or break, thereby ensuring the reliability and safety of the conveying section.
[0036] Preferably, the grouting section 32 is an aluminum-plastic water pipe with a diameter of 25 mm. The aluminum-plastic water pipe has strong plasticity and is easy to bend and adjust the shape to meet different engineering requirements. This flexibility makes the arrangement of the grouting pipe more flexible and can adapt to annular or spiral application scenarios.
[0037] The test results of the single pile bearing capacity and single pile pull-out resistance of the engineering piles obtained by applying the construction auxiliary structure of this embodiment both meet the design requirements.
[0038] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.
Claims
1. A grouting pipe for engineering pile grouting, characterized in that: It comprises a conveying section (31) and a grouting section (32) connected to each other, wherein the outlet end of the conveying section (31) is connected to the inlet end of the grouting section (32); The grouting section (32) is annular or spiral, and is provided with a plurality of grouting ports (4) facing outwards; A one-way valve structure is provided at the grouting port (4).
2. The grouting pipe for engineering pile grouting according to claim 1, characterized in that: The grouting ports (4) are arranged in three directions along the radial direction, namely, an upward grouting port (41), a middle grouting port (42) and a downward grouting port (43).
3. The grouting pipe for engineering pile grouting according to claim 1, characterized in that: Also includes an adhesive tape (5); The adhesive tape (5) is provided with a plurality of sealing members (6) covering the grouting opening (4); the sealing members (6) are fixed to the grouting pipe through the gluing action of the adhesive tape (5).
4. The grouting pipe for engineering pile grouting according to claim 3 is characterized in that: The sealing member (6) is a thumbtack.
5. The grouting pipe for engineering pile grouting according to claim 1, characterized in that: The conveying section (31) is a first steel pipe with an outer diameter of φ32 mm and a wall thickness of 2.5 mm. The steel pipes are connected by electric welding using a threaded joint or a second steel pipe with an outer sleeve outer diameter of φ42 mm and a wall thickness of 3.0 mm.
6. The grouting pipe for engineering pile grouting according to claim 1, characterized in that: The grouting section (32) is an aluminum-plastic water pipe with an inner diameter of φ25 mm.
7. A steel cage, characterized in that: It comprises a steel cage body (2) and a grouting pipe (3) as claimed in any one of claims 1 to 6, one end of the grouting pipe (3) is connected to the steel cage body (2), and the grouting section (32) is arranged on the outside of the steel cage body (2).
8. The steel cage according to claim 7, characterized in that: The conveying section (31) is located outside the steel cage body (2).
9. The steel cage according to claim 7, characterized in that: The grouting pipes (3) are provided in two or more pieces.