Large diameter pile grouting device

Abstract

The invention discloses a large-diameter pile grouting device, including a steel bar cage, "well"-shaped steel bars are fixed at both ends of the steel bar cage, inner ring steel bars are fixed on the "well"-shaped steel bars, four column end grouting pipes are respectively fixed between the "well"-shaped steel bars and the inner ring steel bars, three rows of first grouting holes are opened at the lower end of each column end grouting pipe, three pile side grouting pipes are evenly fixed on the inner side of the steel bar cage, a grouting ring is fixed on the lower outer side of the steel bar cage, and the lower ends of the three pile side grouting pipes are all connected to the grouting ring, and second grouting holes are evenly distributed on the outer side of the grouting ring. The invention grouts into the large-diameter pile at the same time through the grouting ring and the column end grouting pipe, ensuring that the grouting amount parameters of the grouting area can meet the design requirements, improving the soil strength of the grouting area, and the grouting effect of the pile side can also appear the same expansion effect after grouting through the grouting ring, thereby improving the friction resistance of the pile side.

Description

Technical Field

[0001] The invention relates to a large-diameter pile grouting device, belonging to the technical field of building construction. Background Art

[0002] With the continuous development of the construction industry, large-diameter piles are increasingly used in deep foundation pits. Super high-rise buildings usually use large-diameter piles as the pile foundation of the building. However, due to the increasing depth and diameter of the pile foundation, the traditional grouting method through grouting pipes can no longer meet the grouting requirements of such ultra-deep and large-diameter piles, which often results in the grouting area coverage not meeting the standard and the side wall grouting volume not meeting the design requirements. Summary of the invention

[0003] The purpose of the present invention is to provide a large-diameter pile grouting device, so as to ensure that the grouting area coverage reaches the standard, the side wall grouting amount reaches the design requirement, and effectively increase the friction force of the ultra-deep large-diameter pile in the hole.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a large-diameter pile grouting device, including a steel cage, "well"-shaped steel bars are fixed at both ends of the steel cage, inner ring steel bars are fixed on the "well"-shaped steel bars, four column end grouting pipes are respectively fixed between the "well"-shaped steel bars and the inner ring steel bars, three rows of first grouting holes are opened at the lower end of each column end grouting pipe, three pile side grouting pipes are evenly fixed on the inner side of the steel cage, a grouting ring is fixed on the outer side of the lower part of the steel cage, and the lower ends of the three pile side grouting pipes are connected to the grouting ring, and second grouting holes are evenly distributed on the outer side of the grouting ring.

[0005] Furthermore, the grouting ring is composed of three sections of arc-shaped pipes, steel plates are welded between the ends of adjacent arc-shaped pipes, and three pile-side grouting pipes are respectively connected to the three sections of arc-shaped pipes.

[0006] Furthermore, the upper ends of the pile side grouting pipe and the column end grouting pipe are both provided with threaded joints.

[0007] Furthermore, acoustic detection tubes are fixed to the inner side of the steel cage and the inner side of the inner ring steel bars.

[0008] Furthermore, core drilling tubes are evenly fixed on the outer sides of the inner ring steel bars.

[0009] Furthermore, four cooling water pipes are evenly fixed on the "well"-shaped steel bar.

[0010] Due to the adoption of the above technical scheme, the present invention has the following advantages: the present invention simultaneously injects grout into the large diameter pile through the grouting ring and the column end grouting pipe, thereby ensuring that the grouting volume parameters of the grouting area can meet the design requirements, that is, the pressed high-pressure slurry can well overcome the initial compressive stress on the principal stress surface of the soil body, causing the soil body to split and fail, and the slurry penetrates into the soil body along the splitting gap to fill the void and compact the soil on the pile side, thereby promoting soil consolidation, thereby improving the soil strength in the grouting area, and the grouting effect of the area on the pile side can also show the same diameter expansion effect after grouting through the grouting ring, thereby improving the friction resistance on the pile side. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A top view of a schematic structural diagram of the present invention;

[0012] Figure 2 A vertical view of a schematic structural diagram of the present invention;

[0013] Figure 3 Schematic diagram of the structure of the grouting ring. DETAILED DESCRIPTION

[0014] The following will be combined with the embodiments of the present invention and the accompanying drawings to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Embodiments of the present invention: Please refer to Figures 1 to 3A large-diameter pile grouting device comprises a steel cage 1, at both ends of which are fixed "well"-shaped steel bars 3, on which are fixed inner ring steel bars 2, four column end grouting pipes 5 are respectively fixed between the "well"-shaped steel bars 3 and the inner ring steel bars 2, three rows of first grouting holes 10 are opened at the lower end of each column end grouting pipe 5, three pile side grouting pipes 4 are evenly fixed on the inner side of the steel cage 1, a grouting ring 9 is fixed on the outer side of the lower part of the steel cage 1, and the lower ends of the three pile side grouting pipes 4 are all connected to the grouting ring 9, and second grouting holes 13 are evenly distributed on the outer side of the grouting ring 9. The grouting ring 9 is composed of three sections of arc-shaped pipes 11, and steel plates 12 are welded between the ends of adjacent arc-shaped pipes 11, and three pile side grouting pipes 4 are respectively connected to the three sections of arc-shaped pipes 11, so that grouting can be performed simultaneously through the three sections of arc-shaped pipes 11, preventing the grouting pressure from decreasing and improving the grouting effect. The upper ends of the pile side grouting pipes 4 and the column end grouting pipes 5 are provided with threaded joints, which are convenient for connecting with the pile side grouting pipes 4 and the column end grouting pipes 5 on the upper steel cage 1. The inner side of the steel cage 1 and the inner side of the inner ring steel bar 2 are fixed with an acoustic detection tube 6. The outer side of the inner ring steel bar 2 is evenly fixed with a core drilling tube 7; and four cooling water pipes 8 are evenly fixed on the "well"-shaped steel bar 3.

[0016] The present invention simultaneously injects grout into the large-diameter pile through the grouting ring 9 and the column end grouting pipe 5, ensuring that the grouting volume parameters of the grouting area can meet the design requirements, that is, the injected high-pressure slurry can well overcome the initial compressive stress on the principal stress surface of the soil, causing the soil to split and fail, and the slurry penetrates into the soil along the splitting gap to fill the void and compact the soil on the pile side, thereby promoting soil consolidation, thereby improving the soil strength of the grouting area, and the grouting effect of the area on the pile side can also show the same diameter expansion effect after grouting through the grouting ring 9, thereby improving the friction resistance on the pile side.

Claims

1. A large diameter pile grouting device, comprising a steel cage (1), characterized in that: A "well"-shaped steel bar (3) is fixed at both ends of the steel cage (1), an inner ring steel bar (2) is fixed on the "well"-shaped steel bar (3), four column end grouting pipes (5) are respectively fixed between the "well"-shaped steel bar (3) and the inner ring steel bar (2), three rows of first grouting holes (10) are opened at the lower end of each column end grouting pipe (5), three pile side grouting pipes (4) are evenly fixed on the inner side of the steel cage (1), a grouting ring (9) is fixed on the outer side of the lower part of the steel cage (1), and the lower ends of the three pile side grouting pipes (4) are all connected to the grouting ring (9), and second grouting holes (13) are evenly distributed on the outer side of the grouting ring (9); The grouting ring (9) is composed of three sections of arc-shaped pipes (11), steel plates (12) are welded between the ends of adjacent arc-shaped pipes (11), and three pile side grouting pipes (4) are respectively connected to the three sections of arc-shaped pipes (11); The upper ends of the pile side grouting pipe (4) and the column end grouting pipe (5) are both provided with threaded joints; The inner side of the steel cage (1) and the inner side of the inner ring steel bar (2) are both fixed with a sonic detection tube (6); Core drilling tubes (7) are evenly fixed on the outer sides of the inner ring steel bars (2); Four cooling water pipes (8) are evenly fixed on the "well"-shaped steel bar (3).

Images