CN113529523A - Soft foundation reinforcement treatment method based on highway engineering - Google Patents
Soft foundation reinforcement treatment method based on highway engineering Download PDFInfo
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- CN113529523A CN113529523A CN202110846179.2A CN202110846179A CN113529523A CN 113529523 A CN113529523 A CN 113529523A CN 202110846179 A CN202110846179 A CN 202110846179A CN 113529523 A CN113529523 A CN 113529523A
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 67
- 238000003672 processing method Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims description 43
- 238000002347 injection Methods 0.000 claims description 38
- 239000007924 injection Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 24
- 239000002689 soil Substances 0.000 claims description 20
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 17
- 239000012744 reinforcing agent Substances 0.000 claims description 15
- 239000004575 stone Substances 0.000 claims description 15
- 229940102253 isopropanolamine Drugs 0.000 claims description 9
- -1 isopropanolamine compound Chemical class 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 8
- 239000010426 asphalt Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 6
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 claims description 6
- 229940043276 diisopropanolamine Drugs 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 6
- 230000000979 retarding effect Effects 0.000 claims description 6
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 6
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 150000005846 sugar alcohols Polymers 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229920005862 polyol Polymers 0.000 claims description 2
- 150000003077 polyols Chemical class 0.000 claims description 2
- 238000011835 investigation Methods 0.000 claims 2
- 239000000758 substrate Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 230000002035 prolonged effect Effects 0.000 abstract description 7
- 230000008093 supporting effect Effects 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 8
- 239000003085 diluting agent Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
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- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 239000008239 natural water Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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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
-
- 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
-
- 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
-
- 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
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
-
- 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
- E02D5/58—Prestressed concrete piles
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a soft foundation reinforcement processing method based on highway engineering, which comprises a reinforcement device, wherein the reinforcement device comprises prestressed pipe piles, first water-stop plates and second water-stop plates, the first water-stop plates are arranged on two sides of a soft foundation, a plurality of second water-stop plates are arranged between two groups of first water-stop plates, the reinforcement device is divided into a plurality of reinforcement cavities by the second water-stop plates, and a plurality of prestressed pipe piles are arranged in the reinforcement cavities in a staggered mode. According to the soft foundation reinforcement treatment method based on highway engineering, provided by the invention, the soft foundation can be effectively reinforced, the supporting effect of the whole tubular pile is ensured while the work materials are saved, the reinforcing ribs arranged in the prestressed tubular pile enable the prestressed tubular pile to bear larger downward pressure, the service life of the tubular pile is prolonged, the service life of a reinforcement device is prolonged, the sinking of the surface of a highway is effectively avoided, the maintenance cost is reduced, the construction efficiency is improved, the overall quality of the highway is improved, and the waste of concrete is avoided.
Description
Technical Field
The invention relates to the field of highway engineering, in particular to a soft foundation reinforcement treatment method based on highway engineering.
Background
With the development of socioeconomic, the highway is the inevitable product of the socioeconomic development, has become the mark of modern traffic, and is an important mark for measuring the modernization level of national highway traffic transportation and automobile industry. The highway plays a significant role in the world transportation and the national economic development of all countries. In order to provide the utilization rate of the highway and reduce the influence of road maintenance on traveling, the stability of a foundation where the highway is constructed and the convenience of later-stage road maintenance need to be ensured when the highway is constructed, a soft soil foundation is often encountered in the construction of the highway, and the soft foundation is a foundation mainly composed of silt, mucky soil, filling soil, miscellaneous filling soil or other high-compressibility soil layers. The foundation has overlarge natural water content and low bearing capacity, and is easy to slide or solidify and settle under the action of load, so that the soft foundation needs to be reinforced. Therefore, when a highway is built on a soft foundation, the soft foundation must be reinforced in the first step to avoid the reduction of the service life of the road caused by the settlement of the road, and meanwhile, the invention with the application number of cn201710786140.x discloses a reinforcement treatment method for the soft foundation of a newly built highway engineering, which comprises the following steps: step 1, positioning on a foundation to be treated, and burying a row of prestressed pipe piles, wherein the distance between the prestressed pipe piles is set to be 40-80 cm; arranging a row of prestressed pipe piles in front of the arranged prestressed pipe piles, wherein the distance between the front and rear pipe piles is set to be 50-100 cm; sequentially and repeatedly burying prestressed pipe piles, wherein the front pipe pile and the rear pipe pile are staggered; step 2, preparing a soil binder diluent, and uniformly injecting the soil binder diluent into the foundation at different depths through a dispersing and spraying device to bond the peripheral soil of the foundation; simultaneously, tamping and leveling are carried out; step 3, paving a graded broken stone cushion layer above the leveled foundation, and then paving a sand cushion layer to the port of the prestressed pipe pile; and 4, paving a reinforcing steel bar net rack above the port of the prestressed pipe pile, and pouring concrete to finish the reinforcement treatment of the soft foundation. Although the soft foundation is reinforced by the method for reinforcing the soft foundation of the newly-built highway engineering, the purpose of reinforcement is achieved by burying the prestressed pipe piles, the soft foundation without the prestressed pipe piles is bonded by the soil bonding diluent, so that the reinforcing effect is poor, the bearing capacity is not strong, the highway is easily damaged, the soil is bonded into a whole by the soil bonding diluent, and when the local damage of the highway is caused, the local damage cannot be maintained, so that the economic loss is brought.
Disclosure of Invention
The invention aims to provide a soft foundation reinforcement processing method based on highway engineering, which can effectively reinforce a soft foundation by arranging prestressed pipe piles in a reinforcement device in a staggered manner, takes the prestressed pipe piles as main supporting points, ensures the supporting effect of the whole pipe piles while saving labor materials so as to ensure the reinforcement effect, thereby improving the pressure resistance of the highway, effectively avoiding the sinking of the surface of the highway, thereby prolonging the service life of the highway, divides the reinforcement device into a plurality of reinforcement cavities by a second water-stop plate so as to enable the reinforcement cavities to become independent parts so as to keep the whole continuity and strength of the reinforcement cavities, only needs to maintain the independent reinforcement cavities when part of the ground is damaged, avoids the damage of the whole reinforcement device, reduces the maintenance cost, improves the construction efficiency, arranges a reinforcing steel bar net rack above the prestressed pipe piles, and then concrete is poured to form a whole body by the reinforcing steel bar net rack and the concrete layer, and the borne pressure is directly and uniformly distributed by the prestressed pipe piles arranged below, so that the local stress is reduced, the firmness degree of the soft foundation is enhanced, the possibility of pavement settlement is reduced, and the overall quality of the highway is improved, thereby solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a soft foundation reinforcement processing method based on highway engineering, includes a reinforcing apparatus, and reinforcing apparatus includes prestressed pipe pile, first water-stop sheet and second water-stop sheet, first water-stop sheet sets up in the both sides of soft foundation, is equipped with several second water-stop sheet between two sets of first water-stop sheets, and the second water-stop sheet separates reinforcing apparatus for the several and consolidates the chamber, consolidates the crisscross several prestressed pipe pile that is provided with of intracavity, includes following step:
s1: and (3) inspecting the reinforced road section on the spot, measuring the length and the width of the reinforced road section, recording data, modeling according to the measurement and inspection data, determining the depth and the distance of a reinforcing device, and determining the thickness of the laid concrete.
S2: cleaning the soft foundation, excavating the soft soil layer of the foundation, and cleaning up the floating soil, silt, sundries and the like on the ground base layer.
S3: and (5) punching the soft foundation according to the depth of the reinforcing device measured in the step (S1) to embed the reinforcing device.
S4: and filling the reinforcing device.
S5: and paving a gravel cushion layer on the top of the leveling to the pile mouth of the prestressed pipe pile, paving a reinforcing steel bar net rack at the pile mouth of the prestressed pipe pile, and pouring a concrete layer on the reinforcing steel bar net rack to finish the reinforcement treatment of the soft foundation.
And S6, curing the concrete, and spraying water on the surface of the concrete by using a water spraying device every 30-60min after the concrete is poured and solidified to cure the concrete.
Further, the rubble bed course bonds together with the bottom of reinforcing bar rack, and the reinforcing bar rack sets up in the past, and the asphalt layer has been laid to the one side that the reinforcing bar rack was kept away from on concrete layer, and the thickness on asphalt layer is 12 cm.
Further, the prestressed pipe pile comprises protrusions, a pile core and reinforcing ribs, the pile core is arranged at the center of the prestressed pipe pile, the plurality of reinforcing ribs are arranged between the prestressed pipe pile and the pile core at equal intervals, and a plurality of protrusions are arranged on the outer surface of the prestressed pipe pile.
Further, the S4 filling and reinforcing device comprises the following steps:
s401, preparing concrete, uniformly mixing cement, an expanding agent and a retarding and water reducing agent to form a primary mixture, adding water into the primary mixture to mix, adding the mixture to a secondary mixture after uniform mixing, adding fly ash into the secondary mixture to mix again to obtain a final mixture, mixing the final mixture with sand, adding broken stones gradually during mixing, and mixing the mixture to the concrete after uniform mixing.
S402, preparing a concrete reinforcing agent, and stirring and mixing an isopropanolamine compound, triethanolamine, polyol, sodium thiosulfate and water to form the concrete reinforcing agent.
S403: the prepared concrete reinforcing agent and the prepared concrete are uniformly stirred and poured into the injection device, the bottom of the injection pipe is inserted into the bottom of the reinforcing device, the push rod is pushed, the push plate is pushed forwards, and the concrete added with the concrete reinforcing agent is injected into the reinforcing device through the through hole.
And S404, spraying from the bottom end of the soft foundation, wherein the distance between the position of the first spraying and the pipe wall of the prestressed pipe pile is 10-20 cm, the first spraying moves to the side far away from the prestressed pipe pile, and after the first spraying moves by 10-20 cm, the second spraying is carried out at the position with the same depth as the first spraying, wherein the route of the spraying path is S-shaped.
And S405, repeating the step S404 until the spraying path reaches the first water stop plate, and spraying layer by layer until the height of the sprayed layer by layer reaches the top end of the prestressed pipe pile.
Further, injection apparatus includes injection pipe, push rod, push pedal, sealed rubber ring and through-hole, and the inside of injection pipe is equipped with the push pedal, is fixed with the push rod in the push pedal, and the bottom of injection pipe and push pedal all is the toper, and the surface of push rod and the one side that the injection pipe contacted are equipped with round sealed rubber ring, and the bottom of injection pipe is equipped with a plurality of through-holes.
Furthermore, the gravel cushion layer is tamped by a heavy hammer, the heavy hammer is a columnar heavy hammer with the diameter of 35-45 cm and the weight of 3-5 tons, the heavy hammer is bonded by a soil adhesive, the maximum size of the gravel in the gravel cushion layer is not more than 50cm, the thickness of the gravel cushion layer is consistent with that of the concrete layer and is 40cm, and the length and width of the grid of the reinforcing steel bar net rack are set to be 10cm and 10 cm.
Furthermore, the maximum particle size of the broken stone in the concrete is less than 3cm, the maximum particle size of the broken stone is less than the aperture of the through hole, the pH value of the concrete reinforcing agent is controlled to be 8.5-10.5, the specific gravity is controlled to be 1.02-1.15, and the solid content is controlled to be 6.0% -8.0%.
Furthermore, the diameter of the prestressed pipe pile is set to be 15-35cm, the distance between the prestressed pipe piles is 40-80cm, the lengths of the first water-stop sheet and the second water-stop sheet are consistent, the length of the prestressed pipe pile is slightly higher than the heights of the first water-stop sheet and the second water-stop sheet, and the distance between every two adjacent groups of second water-stop sheets is 1.5-2 m.
Further, the cement is 350 portions of 310-plus materials, the expanding agent is 30-40 portions, the sand is 670 portions of 650-plus materials, the gravel is 1100 portions of 1000-plus materials, the water is 180 portions of 160-plus materials, the retarding and water reducing agent is 3-5 portions, and the fly ash is 140 portions of 100-plus materials.
Further, the isopropanolamine compound is 30-50 parts, the polyethanolamine is 10-12 parts, the polyalcohol is 1-5 parts, the sodium thiosulfate is 3-5 parts, the water is 38-56 parts, and the isopropanolamine compound is triisopropanolamine, diisopropanolamine and monoisopropanolamine, wherein the triisopropanolamine is 93.5-98.0%, the diisopropanolamine is 1.5-1.7%, and the monoisopropanolamine is 0.3-5.0%.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a soft foundation reinforcement processing method based on highway engineering, wherein prestressed pipe piles are staggered in a reinforcement device, the soft foundation can be effectively reinforced, the prestressed pipe piles are used as main supporting points, the effect of supporting the whole pipe pile is ensured while the work and materials are saved, the bulges on the prestressed pipe piles can ensure that the pipe piles are firmer and more stable, so that the pipe piles achieve better anti-pulling effect, reinforcing ribs arranged in the prestressed pipe piles enable the pipe piles to bear larger downward pressure, the service life of the pipe piles is prolonged, the service life of the reinforcement device is prolonged, concrete is sprayed in the other opposite side area of the prestressed pipe piles, the concrete is utilized to reinforce in a small area, and the reinforcement effect is ensured by a deep reinforcement mode, so that the compression resistance of the highway is improved, and the subsidence of the surface of the highway is effectively avoided, thereby prolonging the service life of the road.
2. According to the method for reinforcing the soft foundation based on the highway engineering, the reinforcing device is divided into the plurality of reinforcing cavities by the second water-stop sheet to form independent parts, so that the integral continuity and strength of the reinforcing device are maintained, when part of the ground is damaged, only the independent reinforcing cavities are required to be maintained, the damage to the whole reinforcing device is avoided, the maintenance cost is reduced, and the construction efficiency is improved.
3. The invention relates to a soft foundation reinforcement treatment method based on highway engineering, which is characterized in that a broken stone cushion layer, a reinforcing steel bar net rack and a concrete layer are paved at the top end of a reinforcement device, the foundation can be further prevented from sinking due to the size of broken stone particles, meanwhile, the reinforcing steel bar net rack is arranged above a prestressed pipe pile, then, the concrete is poured, so that the reinforcing steel bar net rack and the concrete layer form a whole, the borne pressure is directly and uniformly distributed by the prestressed pipe pile arranged below, the local stress is reduced, the firmness degree of the soft foundation is enhanced, the possibility of pavement settlement is reduced, and the overall quality of a highway is improved.
4. According to the highway engineering-based soft foundation reinforcement treatment method, the sealing rubber ring arranged on the injection device effectively prevents the concrete from flowing back in the injection pipe during injection, the bottom of the injection pipe is conical, so that the injection pipe can be conveniently inserted into the soft foundation, and the bottom of the push plate is conical, so that the concrete in the injection pipe can be conveniently and completely injected from the injection pipe, and the waste of the concrete is avoided.
Drawings
FIG. 1 is a schematic view of a prestressed pipe pile according to the present invention;
FIG. 2 is a schematic cross-sectional view of a reinforcing apparatus according to the present invention;
FIG. 3 is a schematic top view of the reinforcement device of the present invention;
fig. 4 is a schematic structural view of the spraying device of the present invention.
In the figure: 1. pre-stressing pipe piles; 2. a protrusion; 3. pile core; 4. reinforcing ribs; 5. a concrete layer; 6. a steel bar net rack; 7. a gravel cushion layer; 8. an asphalt layer; 9. a first water-stop sheet; 10. a second water-stop sheet; 11. reinforcing the cavity; 12. an injection pipe; 13. a push rod; 14. pushing the plate; 15. sealing the rubber ring; 16. and a through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-3, a method for reinforcing and treating a soft foundation based on highway engineering, and more particularly to a reinforcing device, which comprises a prestressed pipe pile 1, first water-stop plates 9 and second water-stop plates 10, wherein the first water-stop plates 9 are arranged on both sides of the soft foundation, a plurality of second water-stop plates 10 are arranged between two groups of first water-stop plates 9, the reinforcing device is divided into a plurality of reinforcing cavities 11 by the second water-stop plates 10, a plurality of prestressed pipe piles 1 are arranged in the reinforcing cavities 11 in a staggered manner, each prestressed pipe pile 1 comprises a bulge 2, a pile core 3 and a reinforcing rib 4, the pile core 3 is arranged at the center of the prestressed pipe pile 1, a plurality of reinforcing ribs 4 are arranged between the prestressed pipe pile 1 and the pile core 3 at equal intervals, the reinforcing ribs 4 enable the prestressed pipe pile 1 to bear larger downward pressure, the service life of the pipe pile is prolonged, the outer surface of the prestressed pipe pile 1 is provided with a plurality of bulges 2, the bulges 2 can make the tubular pile firmer and more stable, so that the tubular pile can achieve better anti-pulling effect, the diameter of the prestressed tubular pile 1 is set to be 15-35cm, the distance between the prestressed tubular pile 1 is 40-80cm, the lengths of the first water-stop sheet 9 and the second water-stop sheet 10 are consistent, the length of the prestressed tubular pile 1 is slightly higher than the heights of the first water-stop sheet 9 and the second water-stop sheet 10, the distance between two adjacent groups of second water-stop sheets 10 is 1.5m-2m, the gravel cushion layer 7 is tamped by a heavy hammer, the heavy hammer is a columnar heavy hammer with the diameter of 35-45 cm and the weight of 3-5 tons, and is bonded by a soil adhesive, the maximum size of the gravel in the gravel cushion layer 7 is not more than 50cm, the foundation can be further prevented from sinking due to the size of gravel particles, the thickness of the gravel cushion layer 7 is consistent with the thickness of the concrete layer 5 and is 40cm, the grid length and width of the reinforcing steel bar net rack 6 are set to be 10cm, rubble bed course 7 bonds together with reinforcing bar rack 6's bottom, and reinforcing bar rack 6 crisscross setting has strengthened reinforcing bar rack 6's reinforcement effect, and concrete layer 5 is kept away from reinforcing bar rack 6's one side and has been laid asphalt layer 8, and asphalt layer 8's thickness is 12 cm.
Referring to fig. 4, the injection apparatus includes an injection pipe 12, a push rod 13, a push plate 14, a sealing rubber ring 15 and a through hole 16, the push plate 14 is disposed inside the injection pipe 12, the push rod 13 is fixed on the push plate 14, the bottoms of the injection pipe 12 and the push plate 14 are both conical, one surface of the outer surface of the push rod 13, which is in contact with the injection pipe 12, is provided with a circle of sealing rubber ring 15, the sealing rubber ring 15 disposed on the injection apparatus effectively prevents concrete from flowing back when being injected, which causes waste of materials, the bottom of the injection pipe 12 is conical, so that the injection pipe 12 can be conveniently inserted into a soft foundation, the bottom of the push plate 14 is conical, so that the concrete in the injection pipe 12 can be conveniently injected completely from the injection pipe 12, which avoids waste of concrete, and the bottom of the injection pipe 12 is provided with a plurality of through holes 16.
The embodiment provides a soft foundation reinforcement processing method based on highway engineering, which comprises the following steps:
s1: and (3) inspecting the reinforced road section on the spot, measuring the length and the width of the reinforced road section, recording data, modeling according to the measurement and inspection data, determining the depth and the distance of a reinforcing device, and determining the thickness of the laid concrete.
S2: cleaning the soft foundation, excavating the soft soil layer of the foundation, and cleaning up the floating soil, silt, sundries and the like on the ground base layer.
S3: and (5) punching the soft foundation according to the depth of the reinforcing device measured in the step (S1) to embed the reinforcing device.
S4: filling reinforcing apparatus includes the following steps:
s401, preparing concrete, uniformly mixing cement, an expanding agent and a retarding water reducing agent to form a primary mixture, adding water into the primary mixture to mix, adding the mixture into a secondary mixture after uniform mixing, adding fly ash into the secondary mixture to mix again to obtain a final mixture, mixing the final mixture with sand, and sequentially adding crushed stone in the mixing process, wherein the uniformly mixed concrete comprises 350 parts of 310-fold cement, 30-40 parts of the expanding agent, 670 parts of 650-fold sand, 1100 parts of 1000-fold sand, 180 parts of 160-fold water, 3-5 parts of the retarding water reducing agent, 140 parts of 100-fold fly ash, the maximum particle size of the crushed stone in the concrete is less than 3cm, and the maximum particle size of the crushed stone is less than the aperture of a through hole 16.
S402, preparing a concrete reinforcing agent, and stirring and mixing an isopropanolamine compound, triethanolamine, polyhydric alcohol, sodium thiosulfate and water to form the concrete reinforcing agent, wherein the pH value of the concrete reinforcing agent is controlled to be 8.5-10.5, the specific gravity is controlled to be 1.02-1.15, the solid content is controlled to be 6.0-8.0%, 30-50 parts of the isopropanolamine compound, 10-12 parts of polyethanolamine, 1-5 parts of polyhydric alcohol, 3-5 parts of sodium thiosulfate and 38-56 parts of water, and the isopropanolamine compound is triisopropanolamine, diisopropanolamine and monoisopropanolamine, wherein the triisopropanolamine is 93.5-98.0%, the diisopropanolamine is 1.5-1.7% and the monoisopropanolamine is 0.3-5.0%.
S403: the prepared concrete reinforcing agent and the prepared concrete are uniformly stirred and poured into a spraying device, the bottom of a spraying pipe 12 is inserted into the bottom of the reinforcing device, a push rod 13 is pushed, a push plate 14 is pushed forwards, and the concrete added with the concrete reinforcing agent is sprayed into the reinforcing device through a through hole 16.
And S404, spraying from the bottom end of the soft foundation, wherein the distance between the position of the first spraying and the pipe wall of the prestressed pipe pile 1 is 10-20 cm, the first spraying moves to the side far away from the prestressed pipe pile 1, and after the first spraying moves by 10-20 cm, the second spraying is carried out at the position with the same depth as the first spraying, wherein the route of the spraying path is S-shaped.
And S405, repeating the step S404 until the spraying path reaches the first water stop sheet 9, and spraying layer by layer until the spraying layer by layer height reaches the top end of the prestressed pipe pile 1.
S5: laying a layer of broken stone cushion layer 7 to the pile mouth of the prestressed tubular pile 1 at the top of the leveling, laying a reinforcing steel bar net rack 6 at the pile mouth of the prestressed tubular pile 1, and pouring a concrete layer 5 on the reinforcing steel bar net rack 6 to finish the reinforcement treatment of the soft foundation.
And S6, curing the concrete, and spraying water on the surface of the concrete by using a water spraying device every 30-60min after the concrete is poured and solidified to cure the concrete.
In summary, according to the method for reinforcing and treating the soft foundation based on the highway engineering, the pre-stressed pipe piles 1 are arranged in the reinforcing device, the pre-stressed pipe piles 1 are used as main supporting points, the front pre-stressed pipe piles 1 and the rear pre-stressed pipe piles 1 are arranged in a staggered mode, the supporting effect of the whole pipe pile is guaranteed while the work and materials are saved, the pipe pile can be firmer and more stable due to the protrusions 2 on the pre-stressed pipe piles 1, the pipe pile can achieve better anti-pulling effect, the reinforcing ribs 4 arranged in the pre-stressed pipe piles 1 can bear larger downward pressure, the service life of the pipe pile is prolonged, the reinforcing device is divided into the plurality of reinforcing cavities 11 by the second water-stop plate 10 to form independent parts, the whole continuity and strength of the pipe pile are kept, when part of the ground is damaged, only the single reinforcing cavity 11 needs to be maintained, the maintenance cost is reduced, the construction efficiency is improved, and the broken stone cushion 7, The reinforcing steel bar net rack 6 and the concrete layer 5 are laid on the top end of the reinforcing device, the foundation can be further prevented from sinking due to the size of broken stone particles, meanwhile, the reinforcing steel bar net rack 6 is arranged above the prestressed pipe piles 1, then concrete is poured, so that the reinforcing steel bar net rack 6 and the concrete layer 5 form a whole, the borne pressure is directly distributed by the prestressed pipe piles 1 arranged below, the local stress is reduced, the firmness degree of the soft foundation is enhanced, the possibility of pavement settlement is reduced, the overall quality of the highway is improved, the prestressed pipe piles 1 are arranged in the reinforcing cavity 11 in a staggered mode, the soft foundation can be effectively reinforced, the concrete is sprayed on the opposite side area of the prestressed pipe piles 1, the concrete is utilized for reinforcement in a small area, the deep layer reinforcement mode is adopted, the reinforcement effect is ensured, and the pressure resistance of the highway is improved, effectively avoided the highway surface to sink to the life of highway has been prolonged, the effectual backflow that has avoided the concrete when spraying of the last sealed rubber ring 15 of setting of injection apparatus, cause the waste of material, the bottom of injection pipe 12 is the toper, be convenient for insert injection pipe 12 in the soft ground, the bottom of push pedal 14 is the toper, be convenient for spray the concrete in injection pipe 12 is whole from injection pipe 12, avoid causing the waste of concrete.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The utility model provides a soft foundation reinforcement processing method based on highway engineering, includes a reinforcing apparatus, its characterized in that, reinforcing apparatus include stress tube stake (1), first water-stop sheet (9) and second water-stop sheet (10), first water-stop sheet (9) set up in the both sides of soft foundation, are equipped with several second water-stop sheet (10) between two sets of first water-stop sheet (9), and second water-stop sheet (10) separate reinforcing apparatus for several reinforcement chamber (11), and crisscross several stress tube stake (1) that is provided with in reinforcement chamber (11), soft foundation reinforcement processing method includes following step:
s1: carrying out field investigation on a reinforced road section, measuring the length and the width of the reinforced road section, recording data, modeling according to the measurement and investigation data, determining the depth and the distance of a reinforcing device, and simultaneously determining the thickness of laid concrete;
s2: cleaning a soft foundation, namely excavating a soft soil layer of the foundation, and cleaning up floating soil, silt, sundries and the like on a ground substrate layer;
s3: punching the soft foundation according to the depth of the reinforcing device measured in S1, and embedding the reinforcing device;
s4: filling and reinforcing devices;
s5: paving a gravel cushion layer (7) on the leveled top to the pile opening of the prestressed tubular pile (1), paving a reinforcing steel bar net rack (6) at the pile opening of the prestressed tubular pile (1), and pouring a concrete layer (5) on the reinforcing steel bar net rack (6) to finish the reinforcement treatment of the soft foundation;
and S6, curing the concrete, and spraying water on the surface of the concrete by using a water spraying device every 30-60min after the concrete is poured and solidified to cure the concrete.
2. The soft foundation reinforcement processing method based on the highway engineering as recited in claim 1, wherein the gravel cushion layer (7) is bonded with the bottom of the steel bar net rack (6), the steel bar net rack (6) is arranged in a staggered way, an asphalt layer (8) is laid on one side of the concrete layer (5) far away from the steel bar net rack (6), and the thickness of the asphalt layer (8) is 12 cm.
3. The highway engineering-based soft foundation reinforcement processing method according to claim 1, wherein the prestressed pipe pile (1) comprises protrusions (2), a pile core (3) and reinforcing ribs (4), the pile core (3) is arranged at the center of the prestressed pipe pile (1), the plurality of reinforcing ribs (4) are arranged between the prestressed pipe pile (1) and the pile core (3) at equal intervals, and the plurality of protrusions (2) are arranged on the outer surface of the prestressed pipe pile (1).
4. A soft foundation reinforcement processing method based on highway engineering as recited in claim 1, wherein said S4 filling reinforcement means comprises the following steps:
s401, preparing concrete, uniformly mixing cement, an expanding agent and a retarding water reducing agent to form a primary mixture, adding water into the primary mixture to mix, adding the mixture to a secondary mixture after uniform mixing, adding fly ash into the secondary mixture to mix again to obtain a final mixture, mixing the final mixture with sand, adding broken stones gradually in the mixing process, and mixing the mixture to the concrete after uniform mixing;
s402, preparing a concrete reinforcing agent, and stirring and mixing an isopropanolamine compound, triethanolamine, polyol, sodium thiosulfate and water to form the concrete reinforcing agent;
s403: uniformly stirring the prepared concrete reinforcing agent and concrete, pouring the mixture into a spraying device, inserting the bottom of a spraying pipe (12) into the bottom of the reinforcing device, pushing a push rod (13) to enable a push plate (14) to be pushed forwards, and spraying the concrete added with the concrete reinforcing agent into the reinforcing device through a through hole (16);
s404, spraying from the bottom end of the soft foundation, wherein the distance between the position of the first spraying and the pipe wall of the prestressed pipe pile (1) is 10-20 cm, the first spraying moves to the side far away from the prestressed pipe pile (1), and after the first spraying moves by 10-20 cm, the second spraying is carried out at the position with the same depth as the first spraying, wherein the route of the spraying path is S-shaped;
and S405, repeating the step S404 until the spraying path reaches the first water stop plate (9), and spraying layer by layer until the spraying layer by layer height reaches the top end of the prestressed pipe pile (1).
5. The soft foundation reinforcement treatment method based on highway engineering according to claim 4, wherein the injection device comprises an injection pipe (12), a push rod (13), a push plate (14), a sealing rubber ring (15) and a through hole (16), the push plate (14) is arranged inside the injection pipe (12), the push plate (14) is fixed with the push rod (13), the bottoms of the injection pipe (12) and the push plate (14) are both conical, one surface of the outer surface of the push rod (13) contacting the injection pipe (12) is provided with a circle of sealing rubber ring (15), and the bottom of the injection pipe (12) is provided with a plurality of through holes (16).
6. The soft foundation reinforcement processing method based on the highway engineering as recited in claim 1, wherein the gravel cushion layer (7) is tamped by a weight, the weight is a columnar weight with a diameter of 35-45 cm and a weight of 3-5 tons, and is adhered by a soil adhesive, the maximum size of the gravel in the gravel cushion layer (7) is not more than 50cm, the thickness of the gravel cushion layer (7) is consistent with the thickness of the concrete layer (5) and is 40cm, and the length and width of the grid of the steel bar net rack (6) are set to be 10cm by 10 cm.
7. The method for reinforcing and treating the soft foundation based on the highway engineering as recited in claim 4, wherein the maximum particle size of the crushed stone in the concrete is less than 3cm, the maximum particle size of the crushed stone is less than the aperture of the through hole (16), the pH value of the concrete reinforcing agent is controlled to be 8.5-10.5, the specific gravity is controlled to be 1.02-1.15, and the solid content is controlled to be 6.0-8.0%.
8. The soft foundation reinforcement processing method based on highway engineering according to claim 1, wherein the diameter of the prestressed pipe pile (1) is set to be 15-35cm, the distance between the prestressed pipe piles (1) is 40-80cm, the lengths of the first water-stop plate (9) and the second water-stop plate (10) are the same, the length of the prestressed pipe pile (1) is slightly higher than the heights of the first water-stop plate (9) and the second water-stop plate (10), and the distance between two adjacent groups of second water-stop plates (10) is 1.5-2 m.
9. The method as claimed in claim 4, wherein the cement is 350 portions, the expanding agent is 30-40 portions, the sand is 650-670 portions, the gravel is 1000-1100 portions, the water is 160-180 portions, the retarding and water reducing agent is 3-5 portions, and the fly ash is 100-140 portions.
10. The method for reinforcing and treating the soft foundation based on the highway engineering as recited in claim 4, wherein the isopropanolamine compound is 30-50 parts, the polyethanolamine is 10-12 parts, the polyalcohol is 1-5 parts, the sodium thiosulfate is 3-5 parts, the water is 38-56 parts, and the isopropanolamine compound is triisopropanolamine, diisopropanolamine and monoisopropanolamine, wherein the triisopropanolamine is 93.5-98.0%, the diisopropanolamine is 1.5-1.7%, and the monoisopropanolamine is 0.3-5.0%.
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