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Pre-consolidation construction method for completely weathered stratum

A construction method and full weathering technology, applied in infrastructure engineering, excavation, construction, etc., can solve the problems of high cost and large excavation, and achieve the effect of simple operation, fast project progress and reliable technology

Inactive Publication Date: 2013-01-16
中国安能集团第三工程局有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the slope is cut to a naturally stable slope, the excavation project will be large, and the cost will be higher if the steel pipe pile, anchor rod, and steel mesh shotcrete are used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The materials and equipment used in the construction method of the present invention are: cement: the ordinary portland cement grouting material whose label is P.O 32.5 is used. Sand: A certain amount of sand should be added in areas with a large amount of slurry suction. The maximum particle size of the sand is less than 2.5mm, the fineness modulus is not more than 2.0, the mud content is less than 3%, and the organic matter content is not more than 3%; water: meet the requirements of construction water; admixture: add water reducer or accelerator , determined by the test and reported to the supervisory engineer for approval. The main mechanical equipment includes hole-making equipment: XY-2PC geological drilling rig, 30-type hydraulic down-the-hole drilling rig, air compressor, etc.; grouting equipment: BW-200 type grouting pump, 200×200 type pulping machine.

[0044] The concrete construction operation method of present embodiment is as follows:

[0045] 1 Slope Cl...

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Abstract

The invention discloses a pre-consolidation construction method for a completely weathered stratum. The pre-consolidation construction method is characterized in that cement grout materials are filled in gaps among particles of the completely weathered stratum, an intensely weathered stratum or a covering layer under certain pressure, and after solidification of the cement grout materials, consolidated bodies are formed by mixing the particles with grout. The pre-consolidation construction method particularly includes steps of trimming slopes so that the ratio of the slopes ranges from 1:1 to 1:1.3; measuring and setting out hole positions; performing drilling with casing in a non-irrigation section and embedding orifice pipes in the non-irrigation section; forming a hole in a first section by means of drilling with casing; mounting a grouting shock pipe; pulling up the orifice pipe; grouting; waiting for solidification of the cement grout materials, and cleaning the drilled hole; and performing acceptance check. The pre-consolidation construction method is high in pertinence and reliable in technology, construction procedures are simple, operation is simple and convenient, cost is low, and steel materials are saved as compared with other supporting measures such as steel tubular piles. Besides, as compared with the other supporting measures, a ground for implementing the pre-consolidation construction method is easy to arrange, project progress is fast, and the pre-consolidation construction method is favorable for providing operation conditions for follow-up working procedures in time.

Description

technical field [0001] The invention relates to a fully weathered formation protection construction method. Background technique [0002] During the excavation of the fully weathered high slope, there are safety problems during the excavation construction period of the slope and the formation problems of the excavation of the slope. In the construction of water conservancy and hydropower projects, when excavating a fully weathered high slope, it is usually used to cut the slope to a naturally stable slope or use steel pipe piles, anchor rods, reinforced mesh shotcrete and other methods for temporary slope reinforcement. If the slope is cut to a naturally stable slope, the excavation project will be large, and the cost will be higher if the steel pipe pile, anchor rod, and steel mesh shotcrete are used. Contents of the invention [0003] In view of this, the object of the present invention is to provide a bottom consolidation construction method with small excavation amoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20
Inventor 李睿梁建忠党永平李书健涂云詹登民廖维勇周志东邹俊成义娟
Owner 中国安能集团第三工程局有限公司
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