High polymer curtain grouting drilling tool and hole pattern construction method

Abstract

The invention discloses a high polymer curtain grouting drilling tool and a hole pattern construction method. The high polymer curtain grouting drilling tool is a wide-wing drilling tool, namely two wide wings are welded on two sides of a circular drilling rod in certain angles, the wings on the two sides of the drilling rod are triangular steel plates symmetrically welded with cutting edges, andthe end of the circular drilling rod is conical. A curtain grouting hole pattern can be constructed by using the high polymer curtain grouting drilling tool and a static pressing method. According tothe high polymer curtain grouting drilling tool and the hole pattern construction method, the method has the characteristics of quick construction, good seepage resistance, low disturbance to dams and the like; and matched drilling tool and equipment are provided for the high polymer curtain grouting technology for the dams, are successfully applied to multiple reservoir dams and dike danger removal and reinforcement projects, and show huge economic and social benefits and broad development and application prospect.

Description

technical field [0001] The invention belongs to the technical field of risk removal and reinforcement of water conservancy infrastructure, and in particular relates to a construction method of a polymer curtain grouting drilling tool and a hole formwork. Background technique [0002] In recent years, the safety guarantee of my country's water conservancy infrastructure has been highly valued by governments at all levels and widely concerned by the whole society, and the project safety situation is very severe. At present, my country has built 87,000 reservoirs of various types, ranking first in the world. However, about 40% of small reservoirs and 25% of large and medium reservoirs are dangerous reservoirs. Since 1954, there have been about 3,500 large and small dam failures in my country. In addition, about 280,000 kilometers of dikes have been built across the country, but a large number of dikes have various diseases. Dangerous reservoirs and dikes pose a great threat ...

AI Technical Summary

Problems solved by technology

However, the current anti-seepage technology and construction methods of dams still have obvious defects.

The common problems are that the construction period is long, the efficiency is low, and the disturbance or damage to the dam body is relatively large

High-pressure jet grouting makes the grout obtain huge energy through high-pressure devices, but this energy is very difficult to control

Excessive spraying energy will lead to punching damage of the soil, and in the process of forming the strength of the slurry, it is easy to cause the overall strength to be uneven, and the setting time of the slurry is long, and there will be through pores in the soil

Due to the large construction area, curtain grouting is generally constructed in separate grooves, which may easily lead to insufficient effective thickness at the joints, insufficient joints, mud inclusions, etc. The main problems of the concrete anti-seepage wall technology are that the calculation of the wall structure is not reasonable, the engineering design has certain randomness and experience, and the cost is high. The promotion and application of

For a long time, the research on cut-off wall materials has mainly focused on plastic concrete and high-strength (reinforced) concrete, but these two kinds of cut-off walls have their own defects: high-strength concrete cut-off walls cause high stress on the wall due to high elastic modulus. Problem, the strength and impermeability of the plastic concrete cut-off wall are low, and the durability is poor

Since the anti-seepage polymer grouting technology for the dam body is a brand-new technology, there are no related reports on the construction method of polymer curtain grouting drilling tools and hole formwork at home and abroad.

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