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Construction method of municipal soft soil subgrade

A soft soil subgrade and construction method technology, applied in roads, roads, buildings, etc., can solve the problems of subgrade structural stability degradation, affecting road safety, easy bending and fracture, etc., to reduce fine lines, ensure road safety, The effect of not easy to crack

Active Publication Date: 2021-12-21
广东一业建设股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, when dealing with soft soil foundations, support piles are usually driven in, and then concrete caps are poured to form subgrades. However, due to the poor effect of soft soil supporting concrete caps, the parts of the concrete caps far away from the support piles are prone to bending under pressure. fracture, resulting in a decrease in the structural stability of the roadbed and affecting road safety, therefore, there is still room for improvement

Method used

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  • Construction method of municipal soft soil subgrade
  • Construction method of municipal soft soil subgrade
  • Construction method of municipal soft soil subgrade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A kind of concrete slurry, the preparation method of concrete slurry is as follows:

[0070] a. Add 100kg of Portland cement, 90kg of water, and 11kg of water reducing agent into the stirring tank at a speed of 80r / min, and stir for 5min to form cement slurry;

[0071] b. Add 1 kg of tetraphenylmethane to the cement slurry, rotate at a speed of 80 r / min, and stir for 5 minutes to form a primary mixture;

[0072] c. Add 15kg of glass fiber and 50kg of residual mud to the primary mixture at a speed of 70r / min and stir for 8min to form a secondary mixture;

[0073] d. Add 200kg of coarse aggregate and 100kg of fine aggregate to the secondary mixture, and stir at a speed of 45r / min for 15 minutes to form a concrete slurry at a speed of 20r / min, and continue to stir until it is used up.

[0074] The length of the glass fiber is 2 cm.

Embodiment 2

[0076] A kind of concrete slurry, the preparation method of concrete slurry is as follows:

[0077] a. Add 100kg of Portland cement, 100kg of water, and 10kg of water reducing agent into the stirring tank at a speed of 80r / min, and stir for 5min to form cement slurry;

[0078] b. Add 2kg of tetraphenylmethane into the cement slurry, rotate at a speed of 80r / min, and stir for 5min to form a primary mixture;

[0079] c. Add 22.5kg of glass fiber and 75kg of sludge to the primary mixture, and stir at a speed of 70r / min for 8 minutes to form a secondary mixture;

[0080] d. Add 225kg of coarse aggregate and 125kg of fine aggregate to the secondary mixture, and stir at a speed of 45r / min for 15 minutes to form a concrete slurry at a speed of 20r / min, and continue to stir until it is used up.

[0081] The length of the glass fiber is 3 cm.

Embodiment 3

[0083] A kind of concrete slurry, the preparation method of concrete slurry is as follows:

[0084] a. Add 100kg of Portland cement, 110kg of water, and 9kg of water reducing agent into the stirring tank at a speed of 80r / min, and stir for 5min to form cement slurry;

[0085] b. Add 3kg of tetraphenylmethane to the cement slurry, rotate at a speed of 80r / min, and stir for 5min to form a primary mixture;

[0086] c. Add 30kg of glass fiber and 100kg of residual sludge to the primary mixture at a speed of 70r / min and stir for 8min to form a secondary mixture;

[0087] d. Add 250kg of coarse aggregate and 150kg of fine aggregate to the secondary mixture, and stir at a speed of 45r / min for 15 minutes to form a concrete slurry at a speed of 20r / min, and continue to stir until it is used up.

[0088] The length of the glass fibers is 5 cm.

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Abstract

The invention relates to the field of road construction. Aiming at the problem that the part of the concrete cap far away from the support pile is easily bent and broken when it is under pressure, resulting in a decrease in the structural stability of the roadbed, a construction method for a municipal soft soil roadbed is provided. The technical scheme is as follows Including: S1. foundation pit excavation; S2. compaction at the bottom of the foundation pit; S3. sinking support piles into the bottom of the foundation pit; S4. pouring concrete grout in the foundation pit to form a concrete cap; Minutes: 100 parts of Portland cement; 200-250 parts of coarse aggregate; 100-150 parts of fine aggregate; 50-100 parts of residual mud; 15-30 parts of glass fiber; 1-3 parts of tetraphenylmethane; 90 parts of water -110 parts; The length of the glass fiber is 2-5cm. By adding tetraphenylmethane into the concrete slurry, the compressive strength of the concrete cap formed by the concrete slurry is greatly improved, and at the same time, the bending resistance of the concrete cap is improved, so that the concrete cap is not easy to bend and break when it is far away from the support pile , making the subgrade structure stable and ensuring road safety.

Description

technical field [0001] The invention relates to the field of road construction, in particular to a construction method of municipal soft soil roadbed. Background technique [0002] Road is an important part of modern transportation. When building a road, it is necessary to construct a roadbed first. The roadbed is an important structure that supports the weight of the road and the weight of the vehicles on the road. [0003] Soft soil is a common topographic structure with low structural strength. It is extremely dangerous to build roads directly on soft soil. Therefore, it is usually necessary to treat soft soil to form a subgrade with sufficient structural strength before construction the way. [0004] Usually, when dealing with soft soil foundations, support piles are usually driven in, and then concrete caps are poured to form subgrades. However, due to the poor effect of soft soil supporting concrete caps, the parts of the concrete caps far away from the support piles ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04E01C3/00E01C3/04C04B111/34
CPCE01C3/00E01C3/04C04B28/04C04B2111/343C04B22/002C04B2103/302C04B24/00C04B14/42C04B18/0418C04B14/02C04B14/068C04B24/003C04B18/025C04B14/046C04B24/42C04B24/282
Inventor 黄江波许泽霖余晓佳刘桃丽罗小宝
Owner 广东一业建设股份有限公司
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