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A construction method of bored pile
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A technology for bored piles and construction methods, which are applied in drilling equipment and methods, drilling compositions, chemical instruments and methods, etc., can solve the problems of poor compatibility, low recycling rate, and large amount of mud configuration. , to achieve the effect of improving stability, high recycling rate and reducing construction cost
Active Publication Date: 2020-11-24
THE GUANGDONG NO 3 WATER CONSERVANCY & HYDRO ELECTRIC ENG BOARD CO LTD
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Problems solved by technology
[0006] However, the amount of mud configuration is often large, the compatibility between components is poor, and the recycling rate is low, which needs to be improved.
Method used
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Embodiment 1
[0076] Slurry and its preparation method
[0077] The mud comprises the following components by weight: 100 parts of water, 5 parts of bentonite, 2 parts of soda ash, 0.8 part of hydroxymethyl cellulose, 0.4 part of potassium humate and 0.18 part of cyclodextrin; the bentonite is sodium Bentonite;
[0078] Its preparation method comprises the following steps:
[0079] S1, grinding bentonite, potassium humate and cyclodextrin to obtain a mixed powder with a particle size of 200 μm;
[0080] S2. Mix the mixed powder obtained in step S1 with soda ash, add 2 times the sum of the mixed powder and soda ash by weight, stir and mix, add hydroxymethyl cellulose and the remaining amount of water, stir and mix, and obtain;
Embodiment 2
[0082] Slurry and its preparation method
[0083] The mud comprises the following components by weight: 100 parts of water, 10 parts of bentonite, 6 parts of soda ash, 1 part of hydroxymethyl cellulose, 0.7 part of potassium humate and 0.25 part of cyclodextrin; the bentonite is sodium Bentonite;
[0084] Its preparation method comprises the following steps:
[0085] S1, grinding bentonite, potassium humate and cyclodextrin to obtain a mixed powder with a particle size of 300 μm;
[0086] S2. Mix the mixed powder obtained in step S1 with soda ash, add 4 times the sum of the mixed powder and soda ash by weight, stir and mix, add hydroxymethyl cellulose and the remaining water, stir and mix, and obtain;
Embodiment 3
[0088] Slurry and its preparation method
[0089] The mud comprises the following components by weight: 100 parts of water, 8 parts of bentonite, 4 parts of soda ash, 0.9 part of hydroxymethyl cellulose, 0.6 part of potassium humate and 0.3 part of cyclodextrin; the bentonite is sodium Bentonite;
[0090] Its preparation method comprises the following steps:
[0091] S1, grinding bentonite, potassium humate and cyclodextrin to obtain a mixed powder with a particle size of 250 μm;
[0092] S2. Mix the mixed powder obtained in step S1 with soda ash, add 3 times the weight of the mixed powder and soda ash in water, stir and mix, add hydroxymethyl cellulose and the remaining water, stir and mix to obtain.
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Abstract
The invention discloses a construction method for bored cast-in-situ piles, comprising: (1) burying a casing: (2) drilling: during the drilling process, the mud in the hole should be kept at a height of 1m-1.5m higher than the groundwater level, and the drilling The operation must maintain continuity, and the drill bit should be raised and lowered steadily without colliding with the casing and the hole wall; the mud includes the following components: water, bentonite, caustic soda, hydroxymethyl cellulose, potassium humate and cyclodextrin; (3) Hole clearing: (4) Fabrication and installation of reinforcement cages: (5) Filling of underwater concrete. Through the optimization of mud performance parameters and hole quality inspection and other measures, the occurrence of hole collapse and stuck rotation has been avoided, and the drilling quality and speed have been improved, thereby improving the construction quality and shortening the construction period; at the same time, the project The invented slurry is compounded through the grinding of bentonite, potassium humate and cyclodextrin, which improves the stability of the sludge, facilitates the recycling of the sludge, and reduces the construction cost and the subsequent sludge treatment cost.
Description
technical field [0001] The invention relates to the technical field of pile foundation construction, in particular to a construction method for bored piles. Background technique [0002] Cast-in-place pile is a kind of pile made by forming holes in place and pouring concrete or reinforced concrete. Generally, the method of drilling piles is used for construction. Bored cast-in-situ piles refer to piles that use drilling machines to drill pile holes, first hang steel cages in the holes, and pour concrete in the holes. It has the advantages of low construction cost, simple construction operation, no vibration during construction, Low noise, no soil squeezing effect and so on. At present, the construction technology of bored piles has been widely used in the field of construction engineering. [0003] CN108166483A discloses a construction method for bored cast-in-situ piles, specifically: the drilling rig is in place, the mud consistency meets the requirements of the retainin...
Claims
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Application Information
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