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Construction slurry for rotary pile drilling

A technology for constructing mud and rotary digging piles, applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of difficulty in ensuring the stability of the slot holes, high slurry concentration and high cost, and achieves good wall solidification effect and purification performance. Good, low water loss effect

Inactive Publication Date: 2011-10-26
NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned technical scheme can avoid the occurrence of phenomena such as hole forming and reaming difficulties, hole collapse, and drill sticking in the construction of trenchless drilling in complex strata such as sandy soil and quicksand, the technical scheme does not solve the problem of all problems. Rotary drilling construction problems in geological formations such as pebble layers, boulder layers, and vigorous groundwater activities, and there are disadvantages such as complex formulas and high costs
[0005] Due to the poor performance of the mud prepared by ordinary clay and cellulose, low viscosity and high sand content, it is difficult to form dense mud on the hole wall quickly due to high-speed drilling in loose and small-grained formations, and it is difficult to ensure the stability of the slot; The slurry itself has high concentration, high specific gravity, high frictional resistance, difficult purification and pumping, and difficult drilling

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A construction mud for rotary excavation piles, which is formed by mixing the following raw materials, water, bentonite, hydroxypropyl methylcellulose solution, clay and soda ash, and each component is prepared according to the following ratio: water: bentonite: hydroxypropyl methylcellulose Base cellulose solution: clay: soda ash solution=0.95: 0.095: 0.000405: 0.095: 0.00195. The concentration of the hydroxypropyl methylcellulose solution is 1.5%, and the concentration of the soda ash solution is 20%. The following steps are used to prepare the above-mentioned slurry: to prepare the construction mud for the above-mentioned rotary excavation pile, the following steps are used to prepare: add bentonite, hydroxypropyl methylcellulose solution, clay, and soda ash solution to the water in sequence according to the weight ratio of the raw materials, and fully stir After 40-50 minutes, the slurry is prepared, and then the slurry is placed at room temperature for 24 hours to ...

Embodiment 2

[0050] A construction mud for rotary excavation piles, which is formed by mixing the following raw materials, water, bentonite, hydroxypropyl methylcellulose solution, clay and soda ash, and each component is prepared according to the following ratio: water: bentonite: hydroxypropyl methylcellulose Base cellulose solution: clay: soda ash solution = 1: 0.1: 0.0005: 0.1: 0.002. The concentration of the CMC (cellulose) solution is 1.5%, and the concentration of the soda ash solution is 20%. The following steps are used to prepare the construction mud for the above-mentioned rotary excavation pile: add bentonite, hydroxypropyl methylcellulose solution, clay, and soda ash solution to water in sequence according to the weight ratio of raw materials, and fully stir for 40-50 minutes to prepare The slurry was obtained, and then the slurry was placed at room temperature for 24 hours to obtain a slurry product.

Embodiment 3

[0052] A construction mud for rotary excavation piles, which is formed by mixing the following raw materials, water, bentonite, hydroxypropyl methylcellulose solution, clay and soda ash, and each component is prepared according to the following ratio: water: bentonite: hydroxypropyl methylcellulose Base cellulose solution: clay: soda ash solution = 1.05: 0.105: 0.000505: 0.105: 0.00205. The concentration of the CMC (cellulose) solution is 1.5%, and the concentration of the soda ash solution is 20%. The following steps are used to prepare the construction mud for the above-mentioned rotary excavation pile: add bentonite, hydroxypropyl methylcellulose solution, clay, and soda ash solution to water in sequence according to the weight ratio of raw materials, and fully stir for 40-50 minutes to prepare The slurry was obtained, and then the slurry was placed at room temperature for 24 hours to obtain a slurry product.

[0053] Table 1 Performance indicators of bentonite mud

[005...

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Abstract

The invention discloses a type of construction slurry for rotary pile drilling. The slurry is a type of compound slurry comprising water, bentonite, hydroxypropyl methyl cellulose solution, clay and soda ash. The construction slurry provided by the present invention can be widely applied in fields of well drilling, rotary pile drilling, and underground diaphragm wall. During a preparing process, the slurry can be mixed quickly and well. The slurry also has advantages of high efficiency, low pollution, low energy consumption and low cost.

Description

technical field [0001] The invention belongs to a construction mud for rotary excavation piles, in particular to a composite mud, which is especially suitable for rotary drilling construction in geological formations such as full pebble layers, boulder layers, and vigorous groundwater activities. Background technique [0002] Trenchless technology (Trenchless Technology Y or No-Dig) refers to any technology and method for detecting, inspecting, repairing, replacing and laying various underground utilities (pipes and cables) without digging the surface. Directional (guided) drilling technology is the most widely used and fastest-growing construction technology among trenchless technologies. During construction, according to the designed drilling trajectory (generally arc), use directional drilling technology to construct an approximately horizontal pilot hole first, and remove the pilot hole after the pilot hole drill is exposed on the other side of the obstacle to be cross...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/18
Inventor 吴云彭正勇鞠加元
Owner NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG
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