Frame type grouting screw anchor foundation

Abstract

The application discloses a frame type grouting spiral anchor foundation and relates to the technical field of spiral anchor foundations. The frame type grouting spiral anchor foundation comprises an anchor rod, a grouting frame and a grouting pipe. The lower end of the anchor rod is provided with an anchor rod grouting hole. The grouting frame comprises the grouting pipe and a connecting pipe. The grouting pipe is provided with a grouting frame grouting opening. The grouting pipe is communicated with the anchor rod through the connecting pipe. The grouting pipe is arranged around the anchor rod. The frame type grouting spiral anchor foundation is used for improving the bearing capacity of the spiral anchor. The steel pipe type grouting frame enhances the stability of the spiral anchor structure and improves the bearing performance of the spiral anchor and the soil. The steel pipe type grouting frame can uniformly grout on the side of the pile and can alternately grout from far to near. The anchor rod, the anchor disc, the steel pipe type grouting frame and the grouting material form a stable structure system, the bearing capacity of the post-grouting spiral anchor is greatly improved, and the bearing capacity is improved by more than 210%.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spiral anchor foundation, in particular to a frame type grouting spiral anchor foundation. BACKGROUND

[0002] The spiral anchor foundation is screwed into the ground by a hydraulic motor installed on the top of the anchor rod. The spiral anchor foundation has the advantages of fast construction speed, small disturbance to the surrounding soil, and immediate loading after construction. With the in-depth study of the spiral anchor foundation, a small number of engineering applications have been carried out in the foundation of power transmission lines.

[0003] However, due to the low bearing capacity of the spiral anchor foundation, large amount of steel consumption and high comprehensive cost. The existing grouting process of the spiral anchor only grouts from the side hole of the anchor rod, which has the problems of small grouting range and uneven grouting, and cannot achieve the expected grouting effect.

[0004] At the same time, due to the large force of the corner tower and the large span tower foundation, the uplift ultimate bearing capacity of the spiral anchor foundation is difficult to meet. In order to meet the stress condition of the foundation, the group spiral anchor combined with the steel bearing platform, the increase of the length and diameter of the spiral anchor, and the ordinary grouting are usually used to improve the bearing capacity of the foundation. However, although these methods can meet the requirement of bearing capacity, with the increase of the steel bearing platform, the length and diameter of the spiral anchor, the amount of steel and the comprehensive cost are greatly increased, which greatly limits the popularization and application of the spiral anchor foundation.

[0005] In summary, it is necessary to improve the bearing performance of the spiral anchor and optimize the grouting mode of the spiral anchor. SUMMARY

[0006] (I) Technical problems to be solved

[0007] In view of the defects in the prior art, the present application provides a frame type grouting spiral anchor foundation, which solves the problems in the background art.

[0008] (II) Technical scheme

[0009] To achieve the above purpose, the present application realizes the following technical scheme: a frame type grouting spiral anchor foundation, comprising an anchor rod, a anchor rod grouting hole is formed in the lower end of the anchor rod, comprising a grouting frame, the grouting frame comprises a grouting pipe and a communication pipe, the grouting pipe is provided with a grouting frame grouting port, the grouting pipe is communicated with the anchor rod through the communication pipe, and the grouting pipe is arranged around the anchor rod.

[0010] Preferably, a plurality of anchor discs are sleeved on the anchor rod, and the grouting pipe is arranged between the adjacent two anchor discs.

[0011] Preferably, the grouting pipe is parallel to the anchor rod.

[0012] Preferably, the anchor disc is a spiral anchor disc.

[0013] Preferably, the upper and lower ends of the grouting pipe are connected to the anchor plates above and below it, respectively.

[0014] Preferably, the upper end of the anchor bolt is connected to a grouting hose.

[0015] Current helical anchor grouting technology involves grouting along the anchor bolt side, resulting in a limited grouting range and significant uneven grouting. This method is limited for applications on tension towers bearing heavy loads, necessitating improvements to the grouting method to substantially increase the load-bearing capacity of the helical anchor.

[0016] By installing a steel pipe grouting frame between the anchor plates, the stability of the helical anchor structure is enhanced, and the support system formed between the helical anchor and the soil is improved, further increasing the overall load-bearing capacity of the helical anchor by approximately 30%. Through the grout inlet and outlet holes of the steel pipe grouting frame between the anchor plates, grouting can be performed alternately at different distances, increasing the grouting range and uniformity. This grouting range can be adjusted according to the position of the steel pipe grouting frame, with a maximum adjustable grouting range of 4.5 times that of the anchor rod and 1.5 times that of the anchor plate, resulting in a load-bearing capacity increase of over 180%. Considering the improvement in load-bearing capacity brought about by the steel pipe grouting frame, the overall load-bearing capacity increase is over 210%.

[0017] (III) Beneficial Effects

[0018] This invention provides a frame-type grouting spiral anchor foundation. It has the following beneficial effects:

[0019] To enhance the bearing capacity of the helical anchor, this frame-type grouting helical anchor foundation utilizes a steel pipe grouting frame. This frame enhances the stability of the helical anchor structure and improves its bearing capacity after bonding with the soil. Furthermore, the steel pipe grouting frame allows for uniform grouting along the pile side, with alternating grouting at different distances. This creates a stable four-in-one structural system integrating the anchor rod, anchor plate, steel pipe grouting frame, and grouting material, significantly increasing the bearing capacity of the post-grouting helical anchor by over 210%. It also reduces the length of the helical anchor, the diameter of the anchor rod, and the overall investment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 for Figure 1 Section II view in the middle;

[0022] Figure 3 This is a schematic diagram of the grouting frame structure of the present invention;

[0023] Figure 4 The grouting effect diagram of the present application.

[0024] In the figure: 1, anchor rod; 2, anchor disc; 3, grouting frame; 31, grouting pipe; 32, communication pipe; 4, grouting frame grouting hole; 5, grouting frame grouting outlet; 6, anchor rod grouting hole; 7, grouting material; 8, grouting hose. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0026] Embodiment 1:

[0027] A frame type grouting spiral anchor foundation comprises an external grouting hose 8 and an anchor rod 1, grouting material 7 is delivered to the anchor rod 1, the anchor rod 1 side is connected with a grouting frame grouting hole 4, a steel pipe type grouting frame 3 is firmly welded with upper and lower anchor discs 2, the steel pipe type grouting frame 3 is provided with a grouting frame grouting hole 4 and a grouting frame grouting outlet 5. The grouting frame grouting hole 4 is arranged on the inner side of the middle part of the steel pipe type grouting frame 3, the grouting frame grouting outlet 5 is arranged on the outer side of the steel pipe type grouting frame 3 according to three equal parts, and a grouting hole 6 is arranged on the lowest end anchor rod side.

[0028] In the embodiment, one grouting frame grouting hole and eleven grouting frame grouting outlets are arranged on each grouting pipe 31.

[0029] In the embodiment, the grouting frame grouting hole 4 has a hole diameter of 30 mm and the grouting frame grouting outlet 5 has a hole diameter of 10 mm, so as to keep the total grouting material delivery amount of the grouting hole 4 consistent.

[0030] In the embodiment, the grouting frame 3 is located in the middle of the outer anchor disc, the steel pipe type grouting frame 3 is connected with the anchor disc 2 through full welding, and the anchor rod 1, the anchor disc 2 and the steel pipe type grouting frame 3 form a stable whole.

[0031] In the embodiment, two holes with a diameter of 30 mm are arranged on the anchor rod 1 side of the lower anchor disc 2, so as to facilitate the grouting of the spiral anchor bottom.

[0032] In the embodiment, the grouting material 7 adopts PO42.5 Portland cement, the water-cement ratio is 1:0.5, the grouting pressure is 0.3-1.0 MPa, the grouting speed is 27-35 L / min, and the grouting material 7 delivered by the grouting hose 8 is delivered to the inside of the anchor rod 1.

[0033] In this embodiment, a part of the grouting material in the anchor rod 1 is sent to the grouting frame outflow hole 5 through the grouting frame inflow hole 4, and another part of the grouting material is delivered to the anchor rod grouting hole 6 at the lower side of the low-end anchor disc.

[0034] It should be noted that in the description of the application, the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship of the structure of the application shown in the drawings, and are only for the convenience of describing the application simply, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0035] For "first" and "second" in the technical solution, it is only a call distinction for the same or similar structure, or the corresponding structure with similar functions, and is not an arrangement of the importance of these structures, nor a sorting, or a comparison of size, or other meanings.

[0036] In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, the connection can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the communication inside two structures. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the overall idea of the application in connection with the specific circumstances of the present scheme.

Claims

1. A frame-type grouting spiral anchor foundation, comprising an anchor rod (1), wherein the lower end of the anchor rod (1) is provided with an anchor rod grout outlet hole (6), characterized in that: The grouting frame (3) includes a grouting pipe (31) and a connecting pipe (32). The grouting pipe (31) is provided with a grouting frame outlet (5). The grouting pipe (31) is connected to the anchor rod (1) through the connecting pipe (32). The grouting pipe (31) is arranged around the anchor rod (1). The anchor rod (1) is fitted with multiple anchor discs (2), and the grouting pipe (31) is set between two adjacent anchor discs (2); The upper and lower ends of the grouting pipe (31) are connected to the anchor plate (2) above and below it, respectively.

2. The frame-type grouting spiral anchor foundation according to claim 1, characterized in that: The grouting pipe (31) is parallel to the anchor rod (1).

3. A frame-type grouting spiral anchor foundation according to claim 1, characterized in that: The anchor plate (2) is a spiral anchor plate.

4. A frame-type grouting spiral anchor foundation according to claim 1, characterized in that: The upper end of the anchor rod (1) is connected to a grouting hose (8).

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