CN110668751B - Construction method of municipal soft soil roadbed - Google Patents
Construction method of municipal soft soil roadbed Download PDFInfo
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- CN110668751B CN110668751B CN201910928240.0A CN201910928240A CN110668751B CN 110668751 B CN110668751 B CN 110668751B CN 201910928240 A CN201910928240 A CN 201910928240A CN 110668751 B CN110668751 B CN 110668751B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- Ceramic Engineering (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of road construction, and provides a construction method of a municipal soft soil roadbed aiming at the problem that the structural stability of the roadbed is reduced because a part of a concrete bearing platform, which is far away from a support pile, is easy to bend and break when being pressed, wherein the technical scheme is as follows: the method comprises the following steps: s1, excavating a foundation pit; s2, compacting the bottom of the foundation pit; s3, sinking a support pile at the bottom of the foundation pit; s4, pouring concrete grout in the foundation pit to form a concrete bearing platform; the concrete slurry comprises the following components in parts by weight: 100 parts of Portland cement; 200 portions and 250 portions of coarse aggregate; 100 portions and 150 portions of fine aggregate; 50-100 parts of residual mud; 15-30 parts of glass fiber; 1-3 parts of tetraphenyl methane; 90-110 parts of water; the length of the glass fiber is 2-5 cm. Through adding tetraphenyl methane in the concrete thick liquid for the compressive strength of the concrete cushion cap that the concrete thick liquid formed improves by a wide margin, makes the ability of concrete cushion cap anti buckling improve simultaneously, makes the concrete cushion cap keep away from the difficult fracture of buckling of support stake department, makes roadbed structure stable, guarantees road surface safety.
Description
Technical Field
The invention relates to the field of road construction, in particular to a construction method of a municipal soft soil roadbed.
Background
Roads are important components of modern traffic, and when the roads are built, a roadbed is required to be constructed firstly, and the roadbed is an important structure for supporting the weight of the roads and the weight of vehicles on the roads.
Soft soil is a common topographic structure, and has low structural strength, and if a road is directly constructed on the soft soil, the danger is extremely high, so that the road can be constructed after the soft soil is usually treated to form a roadbed with sufficient structural strength.
In general, when a soft soil foundation is treated, a supporting pile is driven in, and then a concrete bearing platform is poured to form the roadbed, but the soft soil supporting concrete bearing platform has poor effect, so that the part of the concrete bearing platform far away from the supporting pile is easy to bend and break when being pressed, the structural stability of the roadbed is reduced, the road safety is affected, and therefore, the improvement space is provided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method of a municipal soft soil roadbed, which has the advantage of keeping the structure of the roadbed stable.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of a municipal soft soil roadbed comprises the following steps:
s1, excavating a foundation pit;
s2, compacting the bottom of the foundation pit;
s3, sinking a support pile at the bottom of the foundation pit;
s4, pouring concrete grout in the foundation pit to form a concrete bearing platform;
the concrete slurry comprises the following components in parts by weight:
100 parts of Portland cement;
200 portions and 250 portions of coarse aggregate;
100 portions and 150 portions of fine aggregate;
50-100 parts of residual mud;
15-30 parts of glass fiber;
1-3 parts of tetraphenyl methane;
90-110 parts of water;
the length of the glass fiber is 2-5 cm.
By adopting the technical scheme, the compressive strength of the concrete bearing platform formed by the concrete slurry is greatly improved by adding the tetraphenyl methane into the concrete slurry, and meanwhile, the bending resistance of the concrete bearing platform is improved, so that the concrete bearing platform is not easy to bend and break away from the supporting pile, the roadbed structure is stable, and the safety of the road surface is ensured;
the glass fiber is added into the concrete slurry to further reinforce the concrete slurry, so that the concrete bearing platform is not easy to crack, fine lines are reduced, and the condition that the concrete bearing platform gradually cracks due to weak points formed at the fine lines is further reduced;
the residual mud is added into the concrete slurry, so that the waste is utilized, and the energy is saved and the environment is protected;
step S3 is carried out after the bottom of the foundation pit is compacted in step S2, so that soil is further extruded during pile sinking, soil density is increased, and a soft soil structure is more stable.
The invention is further configured to: in the step S3, the top of the support pile is higher than the bottom of the foundation pit.
Through adopting above-mentioned technical scheme, be higher than the foundation ditch bottom through supporting the stake top for the concrete pile cap structure that the pouring mixes earth thick liquid with the formation has wrapped up and has supported the stake top, makes the area of being connected of supporting stake and concrete pile cap increase, improves the stability between supporting stake and the concrete pile cap.
The invention is further configured to: in the step S4, the residual mud added to the concrete slurry is residual mud dug during excavation of the foundation pit in the step S1.
By adopting the technical scheme, the cost of residual sludge transportation and treatment is reduced by adding the residual sludge dug out in the S1, the waste is utilized on site, the energy is saved, the environment is protected, and the cost is reduced.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
10-12 parts of triphenylphosphine.
By adopting the technical scheme, the effect of improving the compressive strength and the bending resistance of the concrete bearing platform structure prepared from the concrete slurry is better by adding the triphenylphosphine and the tetraphenyl methane for matching.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
5-8 parts of ceramic powder.
By adopting the technical scheme, the compressive strength and the bending resistance of the concrete bearing platform structure prepared from the concrete slurry are further improved by adding the ceramic powder.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
15-20 parts of nano zircon powder.
Through adopting above-mentioned technical scheme, fill the clearance between coarse aggregate and the fine aggregate in the concrete slurry through adding nanometer zircon powder for the concrete cushion cap structure that the concrete slurry formed is more closely knit, and be difficult for having hole or gap, the reduction is from the condition of space or gap fracture, and simultaneously, the concrete slurry is effectively strengthened to nanometer zircon powder, makes the concrete cushion cap structural stability that the concrete slurry formed better.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
5-8 parts of a silane coupling agent.
By adopting the technical scheme, the silane coupling agent is added, so that the combination of the tetraphenyl methane and the triphenylphosphine with the silicate cement is more stable, the dispersion of the tetraphenyl methane and the triphenylphosphine in the concrete slurry is more uniform, and the effect of the tetraphenyl methane and the triphenylphosphine modified concrete slurry is further ensured.
The invention is further configured to: the concrete slurry also comprises the following components in parts by weight:
15-20 parts of polyurethane adhesive.
Through adopting above-mentioned technical scheme, through adding the polyurethane adhesive, utilize the polyurethane adhesive to permeate to the space between coarse aggregate and the fine aggregate, further improve the closely knit degree of the concrete cushion cap structure of concrete slurry formation, and because the polyurethane adhesive hydrophobicity is better, make the impervious ability of concrete cushion cap stronger, make during the difficult infiltration concrete of rainwater, reduce the erosion to concrete inner structure, utilize polyurethane adhesive elastic deformation to strike with the digestion vibrations simultaneously, make the concrete cushion cap receive difficult fracture when vibrations strike.
The invention is further configured to: the preparation method of the concrete slurry comprises the following steps:
a. mixing portland cement and water to form a cement slurry;
b. adding tetraphenyl methane into the cement slurry and uniformly stirring to form a primary mixture;
c. adding glass fiber and residual mud into the primary mixture and uniformly stirring to form a secondary mixture;
d. and adding coarse aggregate and fine aggregate into the secondary mixture, and uniformly stirring to form concrete slurry.
By adopting the technical scheme, the tetraphenyl methane and the cement slurry are uniformly mixed, so that the dispersion of the tetraphenyl methane is ensured to be uniform; through add coarse aggregate and fine aggregate after glass fiber and surplus mud misce bene earlier, reduce because of coarse aggregate and fine aggregate volume lead to the uneven condition of other raw materials dispersions greatly, guarantee the quality of concrete slurry.
In conclusion, the invention has the following beneficial effects:
1. by adding tetraphenyl methane into the concrete grout, the compressive strength of the concrete bearing platform formed by the concrete grout is greatly improved, and meanwhile, the bending resistance of the concrete bearing platform is improved, so that the concrete bearing platform is not easy to bend and break away from the supporting pile, the roadbed structure is stable, and the safety of the road surface is ensured;
2. the glass fiber is added into the concrete slurry to further reinforce the concrete slurry, so that the concrete bearing platform is not easy to crack, fine lines are reduced, and the condition that the concrete bearing platform gradually cracks due to weak points formed at the fine lines is further reduced;
3. by adding the triphenylphosphine and the tetraphenyl methane for matching, the concrete bearing platform structure prepared by the concrete slurry has better compressive strength and bending resistance.
Drawings
FIG. 1 is a schematic flow diagram of a construction method of a municipal soft soil roadbed in the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the following examples and comparative examples:
the portland cement is Huarun cement PO42.5R ordinary portland cement sold by Ruoze building materials Co., Ltd, Dongguan city;
the coarse aggregate is crushed stone sold by Xu building materials Co., Ltd of Hebeike;
the fine aggregate adopts river sand sold by Shenzhen eight metallurgy engineering industry Co., Ltd;
the glass fiber is sold by Jiangsu Kandafu new material science and technology limited;
the tetraphenylmethane is tetraphenylmethane sold by Alpha chemical Co., Ltd. of Zheng alkane;
the triphenylphosphine adopts triphenylphosphine sold by Zhengzhou Runjing chemical products Limited company;
the ceramic powder is the ceramic powder sold by Guangdong new material (Guangzhou) limited company;
the nanometer zircon powder is prepared by grinding zircon powder sold by Zhanteng mineral processing factories in Lingshou county;
the silane coupling agent is a silane coupling agent KH-550 sold by Jie chemical technology Limited in Guangzhou city;
the polyurethane adhesive adopts a foamless double-component polyurethane adhesive HY813 sold by Shanghai Hao republic of chemical industry Co., Ltd;
the residual mud is the residual mud excavated from the foundation pit in step S1 of example 9.
Example 1
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 90kg of water and 11kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 1kg of tetraphenylmethane into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a primary mixture;
c. adding 15kg of glass fiber and 50kg of residual mud into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. and adding 200kg of coarse aggregate and 100kg of fine aggregate into the secondary mixture, stirring for 15min at the rotating speed of 45r/min to form concrete slurry, and continuously stirring at the rotating speed of 20r/min until the use is finished.
The length of the glass fiber was 2 cm.
Example 2
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 100kg of water and 10kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 2kg of tetraphenylmethane into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a primary mixture;
c. adding 22.5kg of glass fiber and 75kg of residual mud into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. 225kg of coarse aggregate and 125kg of fine aggregate are added into the secondary mixture, the mixture is stirred for 15min at the rotating speed of 45r/min to form concrete slurry, the rotating speed is 20r/min, and the stirring is continued until the use is finished.
The length of the glass fiber was 3 cm.
Example 3
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 110kg of water and 9kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 3kg of tetraphenylmethane into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a primary mixture;
c. adding 30kg of glass fiber and 100kg of residual mud into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. adding 250kg of coarse aggregate and 150kg of fine aggregate into the secondary mixture, stirring for 15min at the rotating speed of 45r/min to form concrete slurry, and continuously stirring at the rotating speed of 20r/min until the use is finished.
The length of the glass fiber was 5 cm.
Example 4
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 100kg of water and 10kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 2.5kg of tetraphenyl methane into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a first-stage mixture;
c. adding 18kg of glass fiber and 88kg of residual mud into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. 245kg of coarse aggregate and 120kg of fine aggregate are added into the secondary mixture, the mixture is stirred for 15min at the rotating speed of 45r/min to form concrete slurry, the rotating speed is 20r/min, and the stirring is continued until the use is finished.
The length of the glass fiber was 4 cm.
Example 5
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 100kg of water and 10kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 2.5kg of tetraphenyl methane and 10kg of triphenylphosphine into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a first-stage mixture;
c. adding 18kg of glass fiber, 88kg of residual mud, 5kg of ceramic powder, 15kg of nano zircon powder, 5kg of silane coupling agent and 15kg of polyurethane adhesive into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. 245kg of coarse aggregate and 120kg of fine aggregate are added into the secondary mixture, the mixture is stirred for 15min at the rotating speed of 45r/min to form concrete slurry, the rotating speed is 20r/min, and the stirring is continued until the use is finished.
The length of the glass fiber was 4 cm.
Example 6
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 100kg of water and 10kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 2.5kg of tetraphenyl methane and 11kg of triphenylphosphine into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a first-stage mixture;
c. adding 18kg of glass fiber, 88kg of residual mud, 5kg of ceramic powder, 17.5kg of nano zircon powder, 6.5kg of silane coupling agent and 17.5kg of polyurethane adhesive into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. 245kg of coarse aggregate and 120kg of fine aggregate are added into the secondary mixture, the mixture is stirred for 15min at the rotating speed of 45r/min to form concrete slurry, the rotating speed is 20r/min, and the stirring is continued until the use is finished.
The length of the glass fiber was 4 cm.
Example 7
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 100kg of water and 10kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 2.5kg of tetraphenyl methane and 12kg of triphenylphosphine into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a first-stage mixture;
c. adding 18kg of glass fiber, 88kg of residual mud, 8kg of ceramic powder, 20kg of nano zircon powder, 8kg of silane coupling agent and 20kg of polyurethane adhesive into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. 245kg of coarse aggregate and 120kg of fine aggregate are added into the secondary mixture, the mixture is stirred for 15min at the rotating speed of 45r/min to form concrete slurry, the rotating speed is 20r/min, and the stirring is continued until the use is finished.
The length of the glass fiber was 4 cm.
Example 8
A concrete slurry is prepared by the following steps:
a. adding 100kg of Portland cement, 100kg of water and 10kg of water reducing agent into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form cement slurry;
b. adding 2.5kg of tetraphenyl methane and 11kg of triphenylphosphine into the cement slurry, stirring at the rotating speed of 80r/min for 5min to form a first-stage mixture;
c. adding 18kg of glass fiber, 88kg of residual mud, 7kg of ceramic powder, 18kg of nano zircon powder, 6kg of silane coupling agent and 16kg of polyurethane adhesive into the primary mixture, stirring at the rotating speed of 70r/min for 8min to form a secondary mixture;
d. 245kg of coarse aggregate and 120kg of fine aggregate are added into the secondary mixture, the mixture is stirred for 15min at the rotating speed of 45r/min to form concrete slurry, the rotating speed is 20r/min, and the stirring is continued until the use is finished.
The length of the glass fiber was 4 cm.
Example 9
A construction method of a municipal soft soil roadbed refers to fig. 1, and comprises the following steps:
s1, excavating a foundation pit, which comprises the following specific steps:
and excavating a foundation pit according to the extending direction of the pavement in the design drawing, wherein the width of the foundation pit is 120% of the design width of the road, and the depth of the foundation pit is 15 cm.
S2, compacting the bottom of the foundation pit, which specifically comprises the following steps:
and compacting the bottom and the side wall of the foundation pit by a road roller.
S3, sinking the supporting pile at the bottom of the foundation pit, which comprises the following steps:
sinking support piles into the foundation pit through a pile driver, wherein the support piles are concrete pipe piles, the interval between every two adjacent support piles is 10m, and the support piles are positioned on the center line of the foundation pit along the length direction;
the top of the supporting pile is located above the bottom of the foundation pit, and the distance between the top of the supporting pile and the bottom of the foundation pit is 5 cm.
S4, pouring concrete slurry in the foundation pit, which comprises the following concrete steps:
and separating the foundation pit by using a template to form a pouring area, pouring concrete slurry towards the pouring area to form a concrete bearing platform, and controlling the length of the pouring area to be 100 m.
In this example, the concrete slurry of example 8 was used as the concrete slurry, and in other examples, the concrete slurry of examples 1 to 7 was used as the concrete slurry.
Comparative example 1
The difference from example 8 is that:
in step b, the addition of tetraphenylmethane is eliminated.
Comparative example 2
The difference from example 8 is that:
in step b, the addition of triphenylphosphine is eliminated.
Comparative example 3
The difference from example 8 is that:
in step c, the addition of ceramic powder is eliminated.
Comparative example 4
The difference from example 8 is that:
and c, eliminating the addition of the nano zircon powder.
Comparative example 5
The difference from example 8 is that:
in step c, the addition of silane coupling agents is eliminated.
Comparative example 6
The difference from example 8 is that:
in step c, the addition of polyurethane adhesive is eliminated.
Experiment 1
The flexural strength (MPa) of the samples prepared from the concrete slurries of examples 1 to 8 and comparative examples 1 to 6 was examined according to the flexural strength test in GB/T50081-2002 Standard for testing mechanical Properties of ordinary concrete.
Experiment 2
The 7d compressive strength (MPa) and 28d compressive strength (MPa) of the samples prepared from the concrete slurries of examples 1 to 8 and comparative examples 1 to 6 were measured according to the compressive strength test in GB/T50081-2002 Standard for testing mechanical Properties of ordinary concrete.
Experiment 3
The samples prepared from the concrete slurries of examples 1 to 8 and comparative examples 1 to 6 were tested for their impermeability rating according to the water penetration resistance test in GB/T50082-2009 Standard test methods for Long-term Performance and durability of ordinary concrete.
The specific experimental data are shown in Table 1
TABLE 1
According to table 1, the comparison between the data of comparative example 1 and the data of example 8 can show that adding tetraphenylmethane into the concrete slurry can effectively improve the compressive strength and the flexural strength of the concrete structure, so that the structural stability of the concrete bearing platform is better, the concrete bearing platform is not easy to bend and break, the roadbed is more stable, and the road built on the roadbed is safe and stable.
According to the comparison of the data of comparative example 2 and example 8, the effect of tetraphenylmethane in improving the compressive strength and the flexural strength of a concrete structure can be effectively improved by adding triphenylphosphine and phenylmethane in a specific ratio into the concrete slurry, so that the structural stability of the concrete bearing platform is better.
According to the comparison of the data of comparative example 3 and example 8, the ceramic powder is added into the concrete slurry, so that the compressive strength and the flexural strength of the concrete structure can be improved to a certain extent, the structural stability of the concrete bearing platform is further improved, the anti-permeability grade of the concrete structure is effectively improved, and the compactness of the concrete structure is improved.
According to the comparison of the data of comparative example 4 and example 8, the nano zircon powder added into the concrete slurry can improve the compressive strength and the flexural strength of the concrete structure to a certain extent, further improve the structural stability of the concrete bearing platform, effectively improve the anti-permeability grade of the concrete structure and improve the compactness of the concrete structure.
According to the comparison of the data of comparative example 5 and example 8, the silane coupling agent is added into the concrete slurry, so that the tetraphenyl methane and the triphenyl phosphine are dispersed in the concrete slurry more uniformly, and further the compressive strength and the flexural strength of the concrete structure are improved, and the structural stability of the concrete bearing platform is further improved.
According to the comparison of the data of comparative example 6 and example 8, the polyurethane adhesive is added into the concrete slurry, which can effectively improve the impermeability grade of the concrete structure, better fill the gap of the concrete structure, and reduce the cracking caused by the weak point formed by the gap.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. A construction method of a municipal soft soil roadbed is characterized by comprising the following steps: the method comprises the following steps:
s1, excavating a foundation pit;
s2, compacting the bottom of the foundation pit;
s3, sinking a support pile at the bottom of the foundation pit;
s4, pouring concrete grout in the foundation pit to form a concrete bearing platform;
the concrete slurry comprises the following components in parts by weight:
100 parts of Portland cement;
200 portions and 250 portions of coarse aggregate;
100 portions and 150 portions of fine aggregate;
50-100 parts of residual mud;
15-30 parts of glass fiber;
1-3 parts of tetraphenyl methane;
90-110 parts of water;
10-12 parts of triphenylphosphine;
the length of the glass fiber is 2-5 cm.
2. The method of constructing a municipal soft soil subgrade according to claim 1, which is characterized in that: in the step S3, the top of the support pile is higher than the bottom of the foundation pit.
3. The method of constructing a municipal soft soil roadbed according to claim 2, wherein the method comprises the following steps: in the step S4, the residual mud added to the concrete slurry is residual mud dug during excavation of the foundation pit in the step S1.
4. The method of constructing a municipal soft soil subgrade according to claim 1, which is characterized in that: the concrete slurry also comprises the following components in parts by weight:
5-8 parts of ceramic powder.
5. The method of constructing a municipal soft soil subgrade according to claim 1, which is characterized in that: the concrete slurry also comprises the following components in parts by weight:
15-20 parts of nano zircon powder.
6. The method of constructing a municipal soft soil roadbed according to claim 3, wherein the method comprises the following steps: the concrete slurry also comprises the following components in parts by weight:
5-8 parts of a silane coupling agent.
7. The method of constructing a municipal soft soil subgrade according to claim 1, which is characterized in that: the concrete slurry also comprises the following components in parts by weight:
15-20 parts of polyurethane adhesive.
8. The method of constructing a municipal soft soil subgrade according to claim 1, which is characterized in that: the preparation method of the concrete slurry comprises the following steps:
a. mixing portland cement and water to form a cement slurry;
b. adding tetraphenyl methane into the cement slurry and uniformly stirring to form a primary mixture;
c. adding glass fiber and residual mud into the primary mixture and uniformly stirring to form a secondary mixture;
d. and adding coarse aggregate and fine aggregate into the secondary mixture, and uniformly stirring to form concrete slurry.
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| CN111362622A (en) * | 2020-03-18 | 2020-07-03 | 安徽工业大学 | Preparation method of extreme atmospheric condition toughened harm-reducing pavement concrete material |
| CN113718569B (en) * | 2021-08-16 | 2022-08-12 | 广东万业建设集团有限公司 | Construction method for constructing road on soft soil foundation |
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| CN109797766A (en) * | 2018-12-25 | 2019-05-24 | 广州市市政集团设计院有限公司 | A kind of cushion cap and pile foundation connection method |
| CN109653198A (en) * | 2019-01-25 | 2019-04-19 | 万晟建设集团有限公司 | Building lot construction method |
| CN110144783A (en) * | 2019-04-26 | 2019-08-20 | 福建省昊立建设工程有限公司 | A kind of roadbed construction method |
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