Construction auxiliary structure for engineering pile grouting
By setting up annular or spiral grouting ports and sectional design construction auxiliary structures on the steel cage of the engineering piles, the problem of insufficient bearing capacity and pull resistance of single piles in the deep sand layer is solved, and a more uniform slurry is achieved Improved injection and construction efficiency.
Patent Information
- Application Number
- CN202420495602.8
- 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, ordinary grouting construction structures cannot effectively improve the single pile bearing capacity and single pile pull resistance of engineering piles, and the grouting pipe is easily blocked by concrete, which affects the overall stability and bearing capacity of the foundation.
Design a construction auxiliary structure, including a groove body and a steel cage. The grouting pipe on the steel cage is provided with an annular or spiral grouting port facing the outside. The grouting pipe is divided into a conveying section and a grouting section, and the grouting port is There is a check valve and seal at the location, and the seal is fixed with adhesive tape to ensure that the slurry is evenly injected into the sand layer.
By increasing the contact area of the soil and uniformity of the slurry distribution, the overall load-bearing capacity and pull-out resistance of the engineering piles are improved, blockage problems are avoided, and construction safety and efficiency are ensured.
Smart Images
Figure CN222294993U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, and specifically relates to a construction auxiliary structure used for engineering pile grouting. Background Art
[0002] Engineering pile grouting is a common foundation treatment method, which is mainly used to increase the bearing capacity and stability of the foundation. During the construction process, a specific slurry, such as cement slurry, is injected into the grouting pipe to improve 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 side of the pile. However, in some special geological conditions, especially in scenarios where 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 carried out normally, affecting the overall stress of the pile foundation. Therefore, in response to this problem, it is necessary to research and develop new construction auxiliary structures 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
[0005] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose a construction auxiliary structure for engineering pile grouting, which can improve the single pile bearing capacity and single pile pull-out resistance of the engineering pile structure with a small pile diameter and a long pile length in the scene of thick sand layer.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A construction auxiliary structure for engineering pile grouting comprises a trough body and a steel cage. The steel cage is located in the trough body. A grouting pipe on the steel cage is provided with grouting ports. Several grouting ports are arranged in a ring or spiral shape and face the outside of the steel cage.
[0008] The preferred technical solution of the utility model is that the grouting ports are divided into a first grouting port group and a second grouting port group, and the grouting ports in the first grouting port group and the second grouting port group are respectively arranged in a ring shape or a spiral shape.
[0009] The preferred technical solution of the utility model is that the grouting pipe is connected by a conveying section and a grouting section, the grouting section is arranged on the outside of the steel cage, and the grouting port is arranged on the grouting section.
[0010] The preferred technical solution of the utility model is that the conveying section is located outside the steel cage.
[0011] 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.
[0012] The preferred technical solution of the utility model is that a one-way valve structure is arranged at the grouting port.
[0013] The preferred technical solution of the utility model is that an adhesive tape is provided on the grouting pipe, and a plurality of sealing members covering the grouting ports are provided on the adhesive tape, and the sealing members are fixed on the grouting pipe by the adhesive effect of the adhesive tape.
[0014] An optimal technical solution of the utility model is that the sealing member is a thumbtack.
[0015] The preferred technical solution of the utility model is that the grouting section is located at the sand layer position of the trough body.
[0016] The preferred technical solution of the utility model is that more than two grouting pipes are provided, and the grouting sections of the grouting pipes are respectively located at different sand layer positions of the trough body.
[0017] Beneficial effects of the utility model:
[0018] The utility model proposes a construction auxiliary structure for grouting of engineering piles. The technical solution arranges the position of the grouting port of the grouting pipe so that it is arranged in a ring or spiral shape and faces the outside of the steel cage. Through the above-mentioned construction auxiliary structure, slurry can be injected into the surrounding sand layer more evenly, increasing the contact area with the surrounding soil, improving the bonding force between the slurry and the soil, thereby enhancing the overall bearing capacity of the engineering pile. Even in the scene of thick sand layer, in the engineering pile structure with a small pile diameter and a long pile length, it has a higher single pile bearing capacity and single pile pull-out resistance, meeting the actual application needs. Secondly, the ring-shaped or spiral grouting port setting method can make the slurry more evenly distributed around the pile, avoiding the situation of excessive or insufficient local slurry that may occur under the traditional setting, thereby ensuring the uniformity and consistency of the overall grouting effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] 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.
[0020] Figure 1 It is a schematic diagram of a construction auxiliary structure for engineering pile grouting according to the utility model;
[0021] Figure 2 is a schematic diagram of a grouting pipe;
[0022] Figure 3 is a schematic diagram of a grouting section with a one-way valve structure;
[0023] Figure 4 It is a schematic cross-sectional view of the grouting port of the grouting section.
[0024] In the figure:
[0025] 1- trough body; 2- steel cage; 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
[0026] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0027] 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.
[0028] like Figure 1-4As shown, for the above-mentioned application scenarios, the present embodiment is used for the construction auxiliary structure of engineering pile grouting, including a trough 1 excavated on the ground 71 and a steel cage 2, the steel cage 2 is located in the trough 1, and the grouting pipe 3 on the steel cage 2 is provided with a grouting port 4, and several grouting ports 4 are spirally arranged and facing the outside of the steel cage 2. In this embodiment, the grouting port 4 is arranged in a spiral shape. In addition, according to actual needs, it can also be arranged in a ring shape. This technical solution proposes an innovative solution for improving the single pile bearing capacity and single pile pull-out resistance of the engineering pile structure in the deep sand layer scene. The innovation of the technical solution of this embodiment is that by setting a spiral grouting port on the steel cage and facing the outside of the steel cage, the slurry can be more effectively injected into the surrounding sand layer during the grouting process, achieving the following effects: First, through this setting method, the slurry can be injected into the surrounding sand layer more evenly, increasing the contact area with the surrounding soil body, and improving the bonding force between the slurry and the soil body, thereby enhancing the overall bearing capacity of the engineering pile. Secondly, the annular or spiral grouting port setting method can make the slurry more evenly distributed around the pile, avoiding the situation of local excess or insufficient slurry that may occur under the traditional setting, thereby ensuring the uniformity and consistency of the overall grouting effect. In addition, the setting method facing the outside of the steel cage can also effectively prevent the slurry from obstructing or damaging the steel cage, ensuring the integrity and bearing capacity of the steel cage, and also facilitating construction operations. In summary, this technical solution effectively solves the problem of improving the bearing capacity and pull-out resistance of single piles in engineering pile structures used in deep sand layers through innovative grouting port settings, improves the overall performance and stability of engineering piles, and provides a feasible solution for the safety and reliability of foundation engineering.
[0029] 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.
[0030] Preferably, the grouting pipe 3 is connected by a conveying section 31 and a grouting section 32, the grouting section 32 is arranged on the outside of the steel cage 2, and the grouting port 4 is arranged on the grouting section 32. The grouting pipe is divided into a conveying section and a grouting section, so that the construction process is more flexible and efficient. The conveying section can be used to convey the slurry to the target location, while the grouting section is specifically used for slurry injection. This segmented design can make the grouting construction more accurate and improve the construction efficiency.
[0031] Preferably, the conveying section 31 is located outside the steel cage 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 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.
[0036] 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.
[0037] 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 construction auxiliary structure for engineering pile grouting, characterized in that: It comprises a tank body (1) and a steel cage (2), wherein the steel cage (2) is located inside the tank body (1); The grouting pipe (3) on the steel cage (2) is provided with a grouting port (4), and a plurality of the grouting ports (4) are arranged in a ring shape or a spiral shape and face the outside of the steel cage (2); A one-way valve structure is provided at the grouting port (4).
2. The construction auxiliary structure for engineering pile grouting according to claim 1, characterized in that: The grouting ports (4) are 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 a ring shape or a spiral shape.
3. The construction auxiliary structure for engineering pile grouting according to claim 1, characterized in that: The grouting pipe (3) is formed by connecting a conveying section (31) and a grouting section (32); The grouting section (32) is arranged around the outside of the steel cage (2), and the grouting port (4) is arranged on the grouting section (32).
4. The construction auxiliary structure for engineering pile grouting according to claim 3 is characterized in that: The conveying section (31) is located outside the steel cage (2).
5. The construction auxiliary structure for engineering pile grouting according to claim 3 is 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).
6. The construction auxiliary structure for engineering pile grouting according to claim 1, characterized in that: The grouting pipe (3) is provided with 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 (3) through the gluing action of the adhesive tape (5).
7. The construction auxiliary structure for engineering pile grouting according to claim 6 is characterized in that: The sealing member (6) is a thumbtack.
8. The construction auxiliary structure for engineering pile grouting according to claim 3 is characterized in that: The grouting section (32) is located at the sand layer of the tank body (1).
9. The construction auxiliary structure for engineering pile grouting according to claim 1, characterized in that: The grouting pipes (3) are provided in two or more pieces, and the grouting sections (32) of the grouting pipes (3) are respectively located at different sand layer positions of the tank body (1).