Soil nail supporting construction method and drill rod for soil nail supporting construction
A drill pipe and soil nailing technology, which is applied in the field of foundation pit support construction, can solve the problems of difficult hole formation, cumbersome procedures, low production efficiency, etc., and achieves the effects of fast construction speed, simplified procedures and improved production efficiency.
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Embodiment 1
[0033] Such as Figure 1-2 The shown drill rod for support construction includes a rod body 1 and a drill bit 2, the head of the rod body 1 is provided with the drill bit 2; the rod body 1 is provided with an axial hole 3; the rod body 1 is provided with Stirring blades 4 are provided; a spraying channel 5 is arranged inside the stirring blades 4 , and the spraying channel 5 communicates with the axial hole 3 . Through the drill pipe, drilling and grouting can be carried out simultaneously in the construction process of soil nailing. The tail end of the rod body 1 is welded to the grouting liquid pipeline, and the grouting liquid pipeline communicates with the axial hole 3, and the grouting liquid Enter the axial hole 3 through the grouting liquid pipeline, and then spray out through the grouting channel 5.
[0034] The stirring blade 4 is perpendicular to the rod body 1 . Through this technical solution, drilling can be performed more efficiently.
[0035] The number of th...
Embodiment 2
[0038] The project of this embodiment is the first floor underground, the excavation depth is 5.40 meters, and the area is about 5600 square meters. It is a foundation pit in a soft soil area. The plane of the foundation pit is as follows: image 3 As shown, among them, the icon 6 represents the top of the foundation pit, and the icon 7 represents the bottom of the foundation pit.
[0039] The method of soil nailing support construction of this project comprises the following steps:
[0040] Step 1. Preparation before construction: Clean the surface and level the site in the excavation area of the foundation pit; locate the upper and lower edges of the foundation pit and the outer edge of the foundation; excavate according to the design conditions of the foundation pit support to form a slope , modify the slope flatness;
[0041] Design 4 rows of soil nails, such as Figure 4 ,details as follows:
[0042] The diameter of the first row of steel bars 9 is 16mm, the diameter...
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