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Grouting device suitable for sandy soil foundation pit

A grouting device and soil quality technology, used in soil protection, infrastructure engineering, construction, etc., can solve problems such as hole collapse, large amount of cementitious materials, and uncontrollable pressure.

Active Publication Date: 2018-07-27
NO 2 ENG CO LTD OF CHINA RAILWAY CONSTR 11 BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In drilling high-pressure grouting technology, when working on sandy soil or gravel pile soil layer with low moisture content, the problem of hole collapse is an important problem that plagues the construction. In order to solve this problem, one method is to use cement grout or other cementitious materials for grouting and solidification of the hole, and then use the grouting hose for grouting construction after ensuring the stability of the hole wall. Hole collapse occurs; another method is to use hollow anchor rods to drill into sandy soil layers, and then use anchor rods for stable high-pressure grouting. The advantage of this method is that there is no need to consider the problem of hole collapse, but hollow anchors The rod can only be grouted to reinforce the soil layer where it is drilled, and cannot spread to the soil layer around the anchor rod, improving the overall structural strength and stability of the sandy soil layer, and the pressure is uncontrollable during grouting
[0004] In summary, there is no stable and reliable sandy soil grouting reinforcement equipment or method in the prior art.

Method used

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  • Grouting device suitable for sandy soil foundation pit
  • Grouting device suitable for sandy soil foundation pit
  • Grouting device suitable for sandy soil foundation pit

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, Embodiment 1 of the present invention provides a grouting device 001 suitable for sandy soil foundation pits. The grouting device 001 includes a hollow anchor 100 and a grouting machine 200. One end of the anchor 100 is provided with At least one grouting hole 120 is opened on the side wall of the drill bit 110 and the anchor rod 100 adjacent to the drill bit 110. The end of the anchor rod 100 away from the drill bit 110 is inserted with a pressure rod 130 that can move in the axial direction. The outer wall of the pressure rod 130 is provided with at least one The annular grooves 132 are provided with an O-ring sealing ring 133 in each annular groove 132 . The hollow part of the anchor rod 100 between the pressure rod 130 and the drill bit 110 is a pressurized chamber 140, the pressure rod 130 is provided with a grouting channel 131, and the end of the anchor rod 100 away from the drill bit 110 is provided with a sealing plug 150, and the sea...

Embodiment 2

[0044] see Figure 4 As shown, Embodiment 2 of the present invention provides a grouting device 002 suitable for sandy soil foundation pits. The grouting device 002 includes a hollow anchor 100 and a grouting machine 200. One end of the anchor 100 is provided with There are two grouting holes 120 on the side wall of the drill bit 110 and the anchor rod 100 adjacent to the end of the drill bit 110. The end of the anchor rod 100 away from the drill bit 110 is inserted with a pressure rod 130 that can move in the axial direction. Between the pressure rod 130 and the drill bit 110 The hollow part of the bolt 100 is a pressure chamber 140, the pressure rod 130 is provided with a grouting channel 131, and the grouting machine 200 communicates with the pressure chamber 140 through the grouting channel 131, and the pressure rod 130 is also connected with a valve for opening and closing the grouting. In the grouting pressure adjustment assembly 300 of the channel 131 , the end of the a...

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Abstract

The invention provides a grouting device suitable for a sandy soil foundation pit and belongs to the field of engineering equipment. The grouting device suitable for the sandy soil foundation pit comprises a hollow anchor rod and a grouting machine. One end of the anchor rod is provided with a drill bit. The side wall of the end, adjacent to the drill bit, of the anchor rod is provided with at least one grouting hole. A pressure bar which can move axially is inserted into the end, far away from the drill bit, of the anchor rod. The hollow portion, between the pressure bar and the drill bit, of the anchor rod is a pressurization cavity. The pressure bar is provided with a grouting channel. The grouting machine communicates with the pressurization cavity through the grouting channel. The pressure bar is connected with a grouting pressure adjusting assembly used for opening and closing the grouting channel. The grouting device suitable for the sandy soil foundation pit can stably pour grout into a sandy soil layer.

Description

technical field [0001] The invention relates to the field of engineering equipment, in particular to a grouting device suitable for sandy soil foundation pits. Background technique [0002] The grouting reinforcement technology is to use hydraulic pressure or air pressure to inject the reinforcement grout into the loose soil layer and the cracked rock layer, thereby changing the mechanical properties of the rock layer and improving the structural strength and stability of the rock layer. [0003] In drilling high-pressure grouting technology, when working on sandy soil or gravel pile soil layer with low moisture content, the problem of hole collapse is an important problem that plagues the construction. In order to solve this problem, one method is to use cement grout or other cementitious materials for grouting and solidification of the hole, and then use the grouting hose for grouting construction after ensuring the stability of the hole wall. Hole collapse occurs; anothe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/12
CPCE02D3/12
Inventor 丁杰
Owner NO 2 ENG CO LTD OF CHINA RAILWAY CONSTR 11 BUREAU GRP