CN112252299A - Soft soil foundation municipal road treatment method - Google Patents

Soft soil foundation municipal road treatment method Download PDF

Info

Publication number
CN112252299A
CN112252299A CN202011150917.1A CN202011150917A CN112252299A CN 112252299 A CN112252299 A CN 112252299A CN 202011150917 A CN202011150917 A CN 202011150917A CN 112252299 A CN112252299 A CN 112252299A
Authority
CN
China
Prior art keywords
parts
slurry
soft soil
soil foundation
stirring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011150917.1A
Other languages
Chinese (zh)
Inventor
黄俊林
黄清汉
黄汉能
黄俊新
黄清优
唐海林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huizhou Dayawan Municipal Infrastructure Co ltd
Original Assignee
Huizhou Dayawan Municipal Infrastructure Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huizhou Dayawan Municipal Infrastructure Co ltd filed Critical Huizhou Dayawan Municipal Infrastructure Co ltd
Priority to CN202011150917.1A priority Critical patent/CN112252299A/en
Publication of CN112252299A publication Critical patent/CN112252299A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/008—Aldehydes, ketones
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/126—Urea
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/38—Polysaccharides or derivatives thereof
    • C04B24/383—Cellulose or derivatives thereof
    • 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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The application relates to the field of road construction, and particularly discloses a treatment method of a soft soil foundation municipal road. The treatment method of the soft soil foundation municipal road comprises the following steps: step 1, pile positions are set: selecting a plurality of grouting points at intervals of 10-20 m; step 2, stirring, spraying and sinking: injecting the mixed slurry into the pile position at the speed of 40-50cm/min under the pressure of 0.15-0.25kPa, wherein the sinking depth is 2.5-5.0m, and stirring for 25-40 s; step 3, stirring and lifting: lifting out the pile position at 90-110cm/min, and lifting to be 25-35cm higher than the pile position; and 4, secondary guniting sinking, stirring and lifting: repeating the step 2 and the step 3 in sequence; and 5, finishing inspection. The slurry in step 2 comprises: 290 portions of water and 320 portions of water; cement 310-340 parts; 4-7 parts of water glass; 9-15 parts of carbonyl pyroaldehyde; 5-8 parts of carbamide. This application has the advantages that the tensile strength of soft soil foundation's splitting is improved by a wide margin when keeping soft soil foundation's compressive strength.

Description

Soft soil foundation municipal road treatment method
Technical Field
The application relates to the field of road construction, in particular to a method for treating a soft soil foundation municipal road and a preparation method thereof.
Background
The soft soil is fine soil with high natural water content, large pore ratio, high compressibility and low shearing strength, and comprises silt, mucky soil, peat soil and the like, and the properties of soft soil foundations vary from place to place, vary from layer to layer and are large in unpredictability, so that the soft soil cannot be directly used as a foundation and needs to be treated to a certain extent.
In the process of constructing municipal roads, a soft soil foundation becomes a very important restrictive factor influencing the quality of the foundation, because the strength and the rigidity of the soft soil foundation are very weak, the safe operation of the municipal roads is very adversely influenced, and the service life of the roads is also influenced.
Although the cement mixing pile method can effectively improve the compressive strength when treating the soft soil foundation, the reinforcing material can firmly improve the engineering performance of the soft soil on some softer foundations, but the compressive strength can be improved to a certain degree, the tensile strength of the split parts is not obviously improved, the split parts are often broken in a brittle manner, and the safe operation of municipal roads and the prolonging of the service life of the roads are not facilitated, so that the cement mixing pile method can improve the space for treating the soft soil foundation.
Disclosure of Invention
In order to improve the treatment strength of the cement-soil mixing pile method on the soft soil foundation, the application provides a treatment method of the soft soil foundation municipal road.
A treatment method of a soft soil foundation municipal road comprises the following steps:
step 1), pile positions are set: selecting a plurality of grouting points at intervals of 10-20m according to the yield strength of the soft soil and the road grade;
step 2), stirring, spraying and sinking: taking the slurry, injecting the mixed slurry into the pile position at the sinking speed of 40-50cm/min under the pressure of 0.15-0.25kPa grade, and stirring for 25-40s, wherein the sinking depth is 2.5-5.0 m;
step 3), stirring and lifting: lifting the pile out of the pile position at a lifting speed of 90-110cm/min, wherein the lifting height is 25-35cm higher than the pile position;
step 4), secondary guniting and sinking, stirring and lifting: repeating the step 2 and the step 3 in sequence;
step 5), finishing inspection: observing that the overflowed slurry does not disappear or quickly disappear, and reinforcing after sealing treatment;
the slurry comprises the following components in parts by mass:
290 portions of water and 320 portions of water;
cement 310-340 parts;
15-20 parts of water glass;
9-15 parts of carbonyl pyroaldehyde;
5-8 parts of carbamide.
Through adopting above-mentioned technical scheme, owing to adopt cement, also can carry out ion exchange between the soil property granule of tiny granule when carrying out ion exchange between the granule of soft clay and the cement, form bigger soil mass group in the soft soil through such mode, combine between soil mass group and the cement and form cement soil mass and the space among the soil mass can be filled by cement for thick liquids and soft soil are united and are had higher intensity and stability.
By adding the water glass, the water glass is matched with the cement and used as a solid binder to ensure that the strength of the cement soil mass is higher, thereby improving the compressive strength of the soft soil foundation.
Through adding carbonyl pyroaldehyde, carbonyl pyroaldehyde is aliphatic water reducing agent, through dissociating in aqueous and by the cement granule absorption, contains a plurality of sulfonic groups or carboxylic acid aldehyde group in the linear macromolecule and can produce the strong electric field, because electrostatic repulsion produces the dispersion to the cement aggregate, the while thick adsorbed layer can produce the space obstacle to the condensation of cement granule, makes the even parcel cement granule of hydroenergy like this, has reduced the water doping volume of cement.
By adding carbamide, the carbamide can keep enough liquid phase at negative temperature, so that the hydration of cement can be continued, the frost resistance of the soft soil foundation can be improved, and the soft soil foundation can keep certain strength in cold environment.
By matching carbamide and carbonyl coking aldehyde in a specific proportion, the splitting tensile strength of the soft soil foundation is greatly improved on the basis that the carbamide is kept to reduce the water doping amount of cement and the carbonyl coking aldehyde is kept to be frost-resistant.
Preferably, the slurry further comprises the following components in parts by mass:
6-9 parts of a polycarboxylic acid water reducing agent.
By adopting the technical scheme, the polycarboxylate water reducing agent is added and matched with the carbonyl coking aldehyde, so that the adsorption layer generates more space obstacles for the coagulation of cement particles, water can wrap the cement particles more uniformly, and the water doping amount of cement is further reduced.
Preferably, the slurry further comprises the following components in parts by mass:
4-7 parts of silver-loaded inorganic zeolite.
By adopting the technical scheme, the silver-loaded inorganic zeolite is added, and has better antibacterial property, so that the antibacterial property of the slurry and the soft soil connection body is further improved, the soft soil foundation is not easy to be corroded by microorganisms, and the strength of the soft soil foundation is kept.
Preferably, the slurry further comprises the following components in parts by mass:
5-8 parts of an accelerator.
By adopting the technical scheme, the accelerator is added, and the accelerator precipitates the hydration product crystals in the solution, so that the cement concrete is quickly condensed, thereby enabling the cement in the soft soil foundation and the soil mass of the soft soil to be more quickly condensed and shortening the construction period.
Preferably, the slurry further comprises the following components in parts by mass:
4-7 parts of shrinkage reducing agent.
By adopting the technical scheme, the shrinkage reducing agent is added, and by adopting the technical scheme, the shrinkage reducing agent can reduce the surface tension of water, reduce the shrinkage stress generated when the capillary pores lose water, increase the viscosity of concrete pore water, enhance the adsorption of water in the aggregate and reduce the shrinkage value of the soft soil foundation.
Preferably, the slurry further comprises the following components in parts by mass:
4.5-6 parts of modified sodium lignosulphonate.
By adopting the technical scheme, the modified sodium lignosulphonate is added, so that the workability of a soil mass formed by the slurry and the soft soil can be improved, the bleeding performance and the segregation are reduced, the consistency is increased, the cement is saved, the compression resistance, the bending resistance and the splitting tensile strength are improved, the hydration heating rate is delayed, the cracking is avoided, the soft soil foundation is more compact, and the impermeability and the durability are improved.
Preferably, the slurry further comprises the following components in parts by mass:
3-5 parts of a hardening accelerator.
By adopting the technical scheme, the hardening accelerator is added to accelerate the hardening of cement and accelerate the precipitation of silicic acid gel in the cement, so that the hardening of the soil blocks of the soft soil and the slurry is accelerated, the soft soil foundation keeps better strength, and the construction period is shortened.
Preferably, the slurry further comprises the following components in parts by mass:
6-9 parts of benzyl cyanoethyl cellulose.
By adopting the technical scheme, the slump loss of the cement can be controlled by adding the benzyl cyanoethyl cellulose, the fluidity of the concrete is improved, the hydration process of the cement is inhibited, the plastic retaining effect is achieved, and the splitting tensile strength of the soft soil foundation is further improved by matching the benzyl cyanoethyl cellulose with the carbonyl pyrogallol and the carbamide in a specific proportion.
Preferably, the preparation method of the slurry comprises the following steps:
mixing water, cement, water glass, carbonyl pyrogallol and carbamide, stirring at the rotating speed of 10-15r/min for 40-60s to form slurry.
By adopting the technical scheme, the slurry is better homogenized and better mechanical strength is obtained by stirring for 40-60s at the rotating speed of 10-15r/min, and meanwhile, the production efficiency of slurry stirring is not influenced.
Preferably, the preparation step of the slurry also comprises the addition of silver-loaded inorganic zeolite, a quick-setting admixture, a shrinkage reducing agent, modified sodium lignosulfonate, a hardening accelerator and benzyl cyanoethyl cellulose.
By adopting the technical scheme, the components are mixed more uniformly by stirring for 40-60s at the rotating speed of 10-15r/min, so that the performance of the components is better exerted, the slurry is better homogenized to obtain better mechanical strength, and the production efficiency of slurry stirring is not influenced.
In summary, the present application has the following beneficial effects:
1. as carbamide and carbonyl pyrogallol are matched in a specific proportion, the splitting tensile strength of the soft soil foundation is greatly improved on the basis of keeping the water doping amount and frost resistance of the cement.
2. Benzyl cyanoethyl cellulose is preferably adopted in the application, and is matched with carbonyl pyrogallol and carbamide in a specific ratio, so that the splitting tensile strength of the soft soil foundation is further improved.
3. According to the slurry stirring device, the components are uniformly mixed through stirring for 40-60s at the rotating speed of 10-15r/min, so that the performance of the components is better exerted, the slurry is better homogenized to obtain better mechanical strength, and the production efficiency of slurry stirring is not influenced.
Detailed Description
The present application will be described in further detail with reference to examples.
The information on the source of each raw material component in the following examples and comparative examples is shown in Table 1
TABLE 1
Figure RE-GDA0002799464160000061
Figure RE-GDA0002799464160000071
Examples 1 to 4: a treatment method of a soft soil foundation municipal road comprises the following steps:
step 1), pile positions are set: selecting a plurality of grouting points at intervals of 15m according to the yield strength of the soft soil and the road grade;
step 2), stirring, spraying and sinking: a stirring pile motor takes slurry to perform mixed slurry injection in a pile position at the sinking speed of 45cm/min under the pressure of 0.2kPa, the sinking depth is 3.2m by taking the ground as a reference, and the stirring is performed for 37 s;
step 3), stirring and lifting: the stirring pile motor lifts the pile position at a lifting speed of 100cm/min, and the lifting height is 30cm higher than the pile position;
step 4), secondary guniting and sinking, stirring and lifting: the stirring pile motor repeats the step 2) and the step 3) in sequence;
step 5), finishing inspection: observing that the overflowed slurry does not disappear or quickly disappear, and reinforcing after sealing treatment;
the slurry in the step 2) is a compound of water, cement, water glass, carbonyl pyrogallol and carbamide.
In examples 1-4, the amounts (in Kg) of each component added are specified in Table 2
TABLE 2
Example 1 Example 2 Example 3 Example 4
Water (W) 290 300 310 320
Cement 310 320 330 340
Water glass 15 17 18 20
Carbonyl pyroaldehydes 9 12 14 15
Carbonyldiamines 5 6 7 8
The slurries of examples 1-4 were prepared by the following method:
adding water, cement, water glass, carbonyl pyrogallol and carbamide into a stirrer, and stirring for 50s at the rotating speed of 13r/min to form slurry.
Example 5
Compared with example 2, the difference is only that:
the treatment method of the soft soil foundation municipal road comprises the following steps:
10m is used as an interval in the step 1).
In the step 2), the pressure of the stirring pile is 0.15kPa, the sinking speed is 40cm/min, the sinking depth is 2.5m, and the stirring is carried out for 25 s.
Lifting the pile out at the lifting speed of 100cm/min in the step 3), wherein the lifting height is 25cm higher than the pile position;
in the preparation step of the slurry, the rotating speed is 10r/min, and the stirring is carried out for 40 s.
Example 6
Compared with example 2, the difference is only that:
the treatment method of the soft soil foundation municipal road comprises the following steps:
the interval of 20m in step 1).
In the step 2), the pressure of the stirring pile is 0.25kPa, the sinking speed is 50cm/min, the sinking depth is 5.0m, and the stirring is carried out for 40 s.
Lifting the pile out at the lifting speed of 110cm/min in the step 3), wherein the lifting height is 35cm higher than the pile position;
in the preparation step of the slurry, the rotating speed is 15r/min, and the stirring is carried out for 60 s.
Examples 7 to 10
Compared with example 2, the difference is only that:
modified sodium lignosulphonate is also added into the slurry.
In examples 7-10, the amounts (in Kg) of each component added are specified in Table 3
TABLE 3
Figure RE-GDA0002799464160000091
Figure RE-GDA0002799464160000101
The modified sodium lignosulfonate is added into a stirrer together with water, cement, water glass, carbonyl pyrogallol and carbamide in the preparation step of the slurry.
Examples 11 to 14
Compared with example 2, the difference is only that:
benzyl cyanoethyl cellulose is also added to the slurry.
In examples 11 to 14, the amounts (in Kg) of the respective components added are specified in Table 4
TABLE 4
Figure RE-GDA0002799464160000102
The benzyl cyanoethyl cellulose is added into a stirrer together with water, cement, water glass, carbonyl pyrogallol and carbamide in the preparation step of the slurry.
Examples 15 to 18
Compared with example 2, the difference is only that:
the slurry is also added with a polycarboxylic acid water reducing agent, silver-carrying inorganic zeolite, a quick-setting agent, a shrinkage reducing agent, modified sodium lignosulphonate, a hardening accelerator and benzyl cyanoethyl cellulose.
The accelerating agent is a compound of sodium aluminate, sodium carbonate and sodium fluoride.
The shrinkage reducing agent is polytrimethylene glycol.
The hardening accelerator is sodium fluosilicate.
In examples 15 to 18, the amounts (in Kg) of the components added are specified in Table 5
TABLE 5
Figure RE-GDA0002799464160000111
Figure RE-GDA0002799464160000121
The method comprises the following steps of adding a polycarboxylic acid water reducing agent, silver-loaded inorganic zeolite, sodium aluminate, sodium carbonate, sodium fluoride, polypropylene glycol, modified sodium lignosulfonate, sodium fluosilicate and benzyl cyanoethyl cellulose into a stirrer together with water, cement, water glass, carbonyl pyrogallol and carbamide in the preparation step of the slurry.
Comparative example 1
Compared with example 2, the difference is only that:
in the preparation step of the slurry, equal amounts of cement were used instead of carbonyl pyroaldehyde and carbamide.
Comparative example 2
Compared with example 2, the difference is only that:
in the slurry preparation step, equal amounts of cement were used in place of carbamide.
Comparative example 3
Compared with example 2, the difference is only that:
in the preparation step of the slurry, equal amount of cement is used to replace carbonyl pyroaldehyde.
Comparative example 4
Compared with example 2, the difference is only that:
in the preparation step of the slurry, the modified sodium lignosulphonate is replaced by equal amount of cement.
Comparative example 5
Compared with example 2, the difference is only that:
in the preparation step of the slurry, the same amount of cement is used to replace benzyl cyanoethyl cellulose.
Experiment 1
Test for compressive Strength
According to GB/T50081-The piece, 3 of each group, after curing 60d, with compression testing machine: selecting a test piece with the expected damage load value larger than 20% of the full range and smaller than 80% of the full range when the range is in a range, ensuring that the precision (relative error of indication values) is not more than +/-1%, ensuring that the flatness tolerance of an upper bearing plate and a lower bearing plate of a testing machine is not more than 0.04mm, the parallelism tolerance is not more than 0.05mm, the surface hardness is not less than 55HRC, ensuring that the plate surface is smooth and flat, the surface roughness Ra is not more than 0.08 mu m, flexibly rotating a ball seat, arranging the ball seat on the top surface of the test piece with the convex surface upward, placing the test piece in front of the testing machine, wiping the upper surface and the lower surface clean, taking the side surface of the test piece during molding as a bearing surface, placing the test piece on the lower bearing plate of the testing machine, aligning the center of the test piece with the center of the lower bearing plate of the testing machine, starting the testing machine, ensuring that the surface of the test piece is uniformly, stopping adjusting the accelerator of the testing machine until the accelerator is damaged, recording the damage load F (N), and recording the damage load according to fccCalculating the pressure bearing area of the test piece according to the F/A, wherein the result is accurate to 0.1MPa, the average value is taken, and A is mm2。
Experiment 2
Tensile Strength test
According to GB/T50081-: selecting a test piece with an expected damage load value larger than 20% of the full range and smaller than 80% of the full range when the range is in a range, ensuring that the precision (relative error of indication values) is not more than +/-1%, ensuring that the flatness tolerance of an upper bearing plate and a lower bearing plate of a testing machine is not more than 0.04mm, the parallelism tolerance is not more than 0.05mm, the surface hardness is not less than 55HRC, ensuring that the plate surfaces are smooth and flat, ensuring that the surface roughness Ra is not more than 0.08 mu m, ensuring that a ball seat rotates flexibly, arranging the ball seat on the top surface of the test piece and the convex surface is upward, arranging the positioning support of the testing machine as a steel support, wiping the upper surface and the lower surface of the test piece before the testing machine, drawing mutually parallel straight lines in the middle parts of the top surface and the bottomThe test piece is placed at the center of a lower bearing plate of a testing machine, a splitting bearing surface and a splitting surface are perpendicular to the top surface of the test piece during molding, an arc-shaped cushion block and a cushion strip are respectively cushioned between the upper and the lower bearing plates, the cross section of the cushion block is a steel arc-shaped cushion block with the radius of 75mm, the length of the cushion block is the same as that of the test piece, the cushion strip is made of common plywood or hard fiberboard, the width of the cushion strip is 20mm, the thickness of the cushion strip is 3mm, the length of the cushion strip is 120mm, and the density of the hard3,Sanding the surface, aligning the cushion block with the central line of the upper surface and the lower surface of the test piece and enabling the cushion block to be vertical to the top surface of the test piece during molding, starting a testing machine, enabling the surface of the test piece to be in uniform contact with the upper bearing plate and the lower bearing plate, continuously loading in the process, testing at the normal temperature, stopping adjusting the accelerator of the testing machine until the test piece is damaged when the test piece approaches to damage and begins to deform rapidly, recording the damage load F (N), and recording the fracture tensile strength f (N)tsThe results were accurate to 0.01MPa at 0.637F/a and are expressed as the average split tensile strength.
The test data of experiments 1-2 are detailed in Table 6
TABLE 6
Figure RE-GDA0002799464160000151
Figure RE-GDA0002799464160000161
According to the comparison of the data of comparative example 2 and comparative example 1 in table 6, after the carbonyl coking aldehyde is added, the compressive strength is improved, and the tensile strength in splitting is basically unchanged, which shows that the compressive strength of the carbonyl coking aldehyde on the soft soil foundation is improved, and the tensile strength in splitting of the soft soil foundation is not negatively influenced.
According to the comparison of the data of comparative example 3 and comparative example 1 in table 6, the compressive strength is improved and the tensile strength at split is basically unchanged after the carbamide is added, which shows that the carbamide improves the compressive strength of the soft soil foundation and has no negative effect on the tensile strength at split of the soft soil foundation.
According to the comparison of the data of the embodiment 2 in the table 6 with the data of the comparative examples 2 and 3, the carbonyl coke aldehyde and the carbonyl diamine are added, the compressive strength is improved in a small range, and the splitting tensile strength is greatly improved, so that the carbonyl coke aldehyde and the carbonyl diamine are matched in a specific proportion, and the splitting tensile strength of the soft soil foundation is greatly improved on the basis of not influencing the compressive strength of the soft soil foundation, so that the soft soil foundation is not easy to crack, and the service life of the pavement is prolonged.
According to the comparison of the data of the example 8 and the comparative example 4 in the table 6, the compression strength is basically unchanged and the splitting tensile strength is further improved by adding the modified sodium lignosulfonate, which shows that the modified sodium lignosulfonate, the carbonyl coking aldehyde and the carbamide are matched in a specific proportion, so that the splitting tensile strength of the soft soil foundation is further improved on the basis of not influencing the compression strength of the soft soil foundation, the soft soil foundation is not easy to crack, and the service life of the road surface is prolonged.
According to the comparison of the data of the example 12 and the comparative example 5 in the table 6, the adding of the benzyl cyanoethyl cellulose can ensure that the compressive strength is basically unchanged and the tensile strength of the split is further improved, which indicates that the benzyl cyanoethyl cellulose, the carbonyl pyrolal and the carbamide are matched in a specific proportion, and the tensile strength of the split of the soft soil foundation is further improved on the basis of not influencing the compressive strength of the soft soil foundation, so that the soft soil foundation is not easy to crack, and the service life of the pavement is prolonged.
According to comparison of data of the example 16 and the examples 8 and 12 in the table 6, the modified sodium lignosulfonate and the benzyl cyanoethyl cellulose are added, so that the compressive strength is basically unchanged, and the tensile strength in splitting is further improved, which indicates that the tensile strength in splitting of the soft soil foundation is further improved on the basis of not influencing the compressive strength of the soft soil foundation, so that the soft soil foundation is not easy to crack, and the service life of the pavement is prolonged.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (10)

1. A treatment method of soft soil foundation municipal road is characterized in that: the method comprises the following steps:
step 1), pile positions are set: selecting a plurality of grouting points at intervals of 10-20m according to the yield strength of the soft soil and the road grade;
step 2), stirring, spraying and sinking: taking the slurry, injecting the mixed slurry into the pile position at the sinking speed of 40-50cm/min under the pressure of 0.15-0.25kPa, taking the ground as the reference, sinking to the depth of 2.5-5.0m, and stirring for 25-40 s;
step 3), stirring and lifting: lifting the pile out of the pile position at a lifting speed of 90-110cm/min, wherein the lifting height is 25-35cm higher than the pile position;
step 4), secondary guniting and sinking, stirring and lifting: repeating the step 2) and the step 3) in sequence;
step 5), finishing inspection: observing that the overflowed slurry does not disappear or quickly disappear, and reinforcing after sealing treatment;
the slurry comprises the following components in parts by mass:
290 portions of water and 320 portions of water;
cement 310-340 parts;
4-7 parts of water glass;
9-15 parts of carbonyl pyroaldehyde;
5-8 parts of carbamide.
2. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the slurry also comprises the following components in parts by mass:
6-9 parts of a polycarboxylic acid water reducing agent.
3. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the slurry also comprises the following components in parts by mass:
4-7 parts of silver-loaded inorganic zeolite.
4. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the slurry also comprises the following components in parts by mass:
5-8 parts of an accelerator.
5. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the slurry also comprises the following components in parts by mass:
4-7 parts of shrinkage reducing agent.
6. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the slurry also comprises the following components in parts by mass:
4.5-6 parts of modified sodium lignosulphonate.
7. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the slurry also comprises the following components in parts by mass:
3-5 parts of a hardening accelerator.
8. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the slurry also comprises the following components in parts by mass:
6-9 parts of benzyl cyanoethyl cellulose.
9. A method of treating a soft soil foundation town road as claimed in claim 1, wherein: the preparation method of the slurry comprises the following steps:
mixing water, cement, water glass, carbonyl pyrogallol and carbamide, stirring at the rotating speed of 10-15r/min for 40-60s to form slurry.
10. A method of treating a soft soil foundation town road as claimed in claim 9, wherein: the preparation method of the slurry also comprises the step of adding silver-loaded inorganic zeolite, an accelerating agent, a shrinkage reducing agent, modified sodium lignosulfonate, a hardening accelerator and benzyl cyanoethyl cellulose.
CN202011150917.1A 2020-10-24 2020-10-24 Soft soil foundation municipal road treatment method Pending CN112252299A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011150917.1A CN112252299A (en) 2020-10-24 2020-10-24 Soft soil foundation municipal road treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011150917.1A CN112252299A (en) 2020-10-24 2020-10-24 Soft soil foundation municipal road treatment method

Publications (1)

Publication Number Publication Date
CN112252299A true CN112252299A (en) 2021-01-22

Family

ID=74262340

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011150917.1A Pending CN112252299A (en) 2020-10-24 2020-10-24 Soft soil foundation municipal road treatment method

Country Status (1)

Country Link
CN (1) CN112252299A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101265058A (en) * 2008-04-17 2008-09-17 中铁二局股份有限公司 Injection concrete
CN102021906A (en) * 2010-12-16 2011-04-20 河南省新开元路桥工程咨询有限公司 Method for reinforcing soft soil foundation at deep mixing pile
CN102303968A (en) * 2011-06-07 2012-01-04 浙江华友新型建材有限公司 Plant fiber light wall and manufacturing method thereof
CN104788045A (en) * 2014-01-18 2015-07-22 上海标仕新型建筑材料厂 Grouting material
CN107032727A (en) * 2017-04-27 2017-08-11 西南科技大学 A kind of preparation method of nanometer of self-compaction air-setting mortar
CN107500626A (en) * 2017-08-29 2017-12-22 招商局蛇口工业区控股股份有限公司 The preparation method of mud mixing pile
CN107686315A (en) * 2017-08-28 2018-02-13 北京铁建永泰新型建材有限公司 Freeze proof mass concrete
CN108396737A (en) * 2018-05-14 2018-08-14 东南大学 The Soil-cement pile material of Strengthening Wet soil base
CN109133746A (en) * 2018-09-04 2019-01-04 徐州金盟新型建材有限公司 A kind of architectural engineering strong concrete
CN109626917A (en) * 2019-02-20 2019-04-16 西安天盛混凝土有限公司 A kind of C70 concrete and preparation method thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101265058A (en) * 2008-04-17 2008-09-17 中铁二局股份有限公司 Injection concrete
CN102021906A (en) * 2010-12-16 2011-04-20 河南省新开元路桥工程咨询有限公司 Method for reinforcing soft soil foundation at deep mixing pile
CN102303968A (en) * 2011-06-07 2012-01-04 浙江华友新型建材有限公司 Plant fiber light wall and manufacturing method thereof
CN104788045A (en) * 2014-01-18 2015-07-22 上海标仕新型建筑材料厂 Grouting material
CN107032727A (en) * 2017-04-27 2017-08-11 西南科技大学 A kind of preparation method of nanometer of self-compaction air-setting mortar
CN107686315A (en) * 2017-08-28 2018-02-13 北京铁建永泰新型建材有限公司 Freeze proof mass concrete
CN107500626A (en) * 2017-08-29 2017-12-22 招商局蛇口工业区控股股份有限公司 The preparation method of mud mixing pile
CN108396737A (en) * 2018-05-14 2018-08-14 东南大学 The Soil-cement pile material of Strengthening Wet soil base
CN109133746A (en) * 2018-09-04 2019-01-04 徐州金盟新型建材有限公司 A kind of architectural engineering strong concrete
CN109626917A (en) * 2019-02-20 2019-04-16 西安天盛混凝土有限公司 A kind of C70 concrete and preparation method thereof

Similar Documents

Publication Publication Date Title
CN113121145B (en) Concrete crack self-repairing material based on microbial collaborative mineralization and application
CN101058499A (en) Concrete light silicon fibre crack-proof intensifier
CN112645655A (en) Green high-performance concrete and preparation method thereof
CN112250390B (en) Nano-fiber curing agent for disintegrating carbonaceous mudstone and preparation and use methods thereof
CN103449761B (en) Hybrid fiber-toughened RPC (reactive powder concrete) and preparation technology
CN107043236A (en) A kind of lightweight aggregate concrete and preparation method thereof
CN115043624B (en) Corrosion-resistant mass concrete and preparation method thereof
CN111592324B (en) Concrete and preparation method thereof
CN113979712A (en) High-performance concrete with low shrinkage
CN114560661B (en) Low-carbon corrosion-resistant concrete and preparation method thereof
CN112252299A (en) Soft soil foundation municipal road treatment method
CN111187042A (en) Light high-strength concrete and preparation method thereof
CN111978043B (en) Self-waterproof concrete and preparation method thereof
CN113429148A (en) Concrete crack-resistant and anti-permeability additive and preparation method thereof
CN113213836A (en) High-strength and good-durability cement concrete and preparation method thereof
CN109336462B (en) High-compression-resistance long-service-life water permeable plate and preparation method thereof
CN111848068A (en) Rapid repair mortar for horizontal surface defects and preparation method thereof
CN110357512A (en) Road construction concrete and preparation method thereof
CN115124309B (en) High-strength anti-permeability concrete and preparation method thereof
CN114394788B (en) Special pervious concrete for pervious bricks and pervious bricks made of concrete
CN115893958A (en) High-strength cement mortar based on iron ore waste residues and preparation process thereof
CN112266194B (en) Coarse aggregate for improving durability of steam-cured concrete and preparation method thereof
CN115677313A (en) Anti-freezing enhanced mine filling material and preparation method thereof
CN112500009B (en) High-durability recycled aggregate concrete and preparation method thereof
CN111960711B (en) Method for producing green and environment-friendly concrete by using graphene composite mine waste residues

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20210122