CN113186900B - Carbon fiber electroosmosis chain type vertical direction reinforcement structure and soft foundation treatment method thereof - Google Patents
Carbon fiber electroosmosis chain type vertical direction reinforcement structure and soft foundation treatment method thereof Download PDFInfo
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 116
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 116
- 230000002787 reinforcement Effects 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005370 electroosmosis Methods 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 claims abstract description 35
- 238000009940 knitting Methods 0.000 claims abstract description 26
- 239000008187 granular material Substances 0.000 claims abstract description 24
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 239000004575 stone Substances 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 230000001174 ascending effect Effects 0.000 claims abstract description 8
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
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- 239000010959 steel Substances 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 11
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- 239000002245 particle Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 3
- 238000007596 consolidation process Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract 1
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- 239000004800 polyvinyl chloride Substances 0.000 description 43
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- 230000007547 defect Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005868 electrolysis reaction Methods 0.000 description 1
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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Abstract
The invention discloses a carbon fiber electroosmosis chain type vertical direction reinforcement structure and a soft foundation treatment method thereof. The method comprises the following steps: wrapping granular materials with a carbon fiber warp knitting conductive net to form a net bag, connecting the net bag into a space regular tetrahedron structure by using carbon fiber strips, wherein the granular materials are building garbage recycled aggregates; fully stirring the regular tetrahedron structure, and then sinking into a vertical reinforcing body containing the double-helix ascending carbon fiber strip and the PVC drainage pipe; laying a sand-stone cushion layer on the soft foundation to form a composite foundation, wherein the cushion layer is a sand-stone cushion layer for laying a horizontal PVC drain pipe; connecting the PVC drain pipe in the reinforcing body in the vertical direction with the horizontal PVC drain pipe to form a complete drainage system; connecting the double-helix ascending carbon fiber strips in the reinforcing body in the vertical direction with a voltage-stabilizing direct-current power supply to form electroosmosis accelerated drainage; the soft foundation treatment method can accelerate the soft foundation drainage rate, shorten the consolidation period and improve the bearing capacity of the composite foundation, and has the advantages of environmental protection, simple construction and the like.
Description
Technical Field
The invention relates to the technical field of soft foundation treatment, in particular to a carbon fiber electroosmosis chain type vertical direction reinforcement structure and a soft foundation treatment method thereof.
Background
Along with the rapid development of national economy of China, the foundation construction is continuously increased by China, the construction of high-rise buildings, expressways and railways of China is rapidly developed, and meanwhile, the generated construction waste cannot be properly treated, so that the environmental pollution is caused; the soft soil foundation is increasingly outstanding, and becomes one of key factors influencing the project quality, the construction period and the project cost. When a soft soil foundation is treated, foundation soil needs to be drained and consolidated, so that the foundation soil has certain strength, the rigid pile composite foundation often has overlarge rigidity difference between piles, and a large amount of foundation soil is settled after drainage and consolidation, so that negative friction resistance of a pile body can be caused, the rigid pile is failed, and especially when the pile body cannot penetrate through a deep high-water-content foundation, a rigid pile treatment mode cannot be used; the discrete material pile composite foundation such as the gravel pile is usually low in strength of soil bodies among piles, the pile body is easy to expand in a large lateral direction, gravel fillers are extruded out in a lateral direction, and the foundation reinforcement effect cannot be achieved; the electroosmosis method for reinforcing the soft soil foundation is environment-friendly and efficient, but only has the drainage consolidation effect on the soft soil foundation, the treatment period is longer, the treatment depth is limited, and the effect of improving the strength of the soft soil foundation is limited. Generally speaking, although there are many methods for treating soft soil foundation, when treating it, the traditional method has not obvious effect in the process of treating deeper soft soil foundation due to long construction period, high cost, difficult quality control after construction, limited strength improvement of soft soil foundation and the like.
Disclosure of Invention
The invention aims to solve the defects of the traditional method for treating the soft soil foundation in the background art; the carbon fiber electroosmosis chain type vertical direction reinforcement structure and the soft foundation treatment method thereof can improve drainage efficiency, accelerate consolidation of a soft soil foundation, shorten construction period, reduce construction cost, restrain lateral expansion of a vertical direction reinforcement, improve bearing capacity and reduce post-construction settlement.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the present invention provides a carbon fiber electroosmosis chain type vertical direction reinforcement structure, which is characterized in that: the carbon fiber warp-knitted fabric comprises a granular material, a plurality of carbon fiber warp-knitted conductive nets, a plurality of double-spiral ascending carbon fiber strips, a plurality of voltage-stabilizing direct current power supply leads, a plurality of PVC drain pipes and a sandstone cushion layer; the PVC drain pipes comprise PVC drain pipes arranged in the vertical direction and PVC drain pipes arranged in the horizontal direction; the PVC drain pipes arranged in the horizontal direction form a PVC drain pipe network in the horizontal direction; the carbon fiber warp-knitted conductive net wraps the granular material to form a net bag; the carbon fiber strips are connected with the net bag to form a spatial regular tetrahedral frame structure; after the spatial regular tetrahedron structure is fully stirred, the carbon fiber strips connected between the net bag and the net bag are mutually wound to form a mutually meshed whole body (since the net bag is connected by the carbon fiber strips, the spatial regular tetrahedron structure is stirred, the carbon fiber strips connected between the net bag and the net bag are mutually wound to form a mutually meshed whole body); putting the carbon fiber strips into a reinforcement hole of a reinforcement (because the structure is similar to a bored pile, the first step of construction is drilling, fully stirring a spatial regular tetrahedron structure, putting the spatial regular tetrahedron structure into a vertical reinforcement hole, vibrating the vertical reinforcement hole, putting the spatial regular tetrahedron structure into a jogged body again until the space reaches the ground to form a vertical reinforcement structure), laying the carbon fiber strips rising in a double-helix manner as an electrode material, and laying a PVC (polyvinyl chloride) drainage pipe in the vertical direction as a drainage device in the reinforcement; the periphery of the vertical reinforcement is wrapped with a layer of carbon fiber warp knitting guide electric network (the carbon fiber warp knitting guide electric network made of the same material is adopted, only the arranged positions are different, the carbon fiber warp knitting guide electric network is the wrapped carbon fiber warp knitting guide electric network on the periphery of the vertical reinforcement, and the formed net bag carbon fiber warp knitting guide electric network is in subordination relation, namely the carbon fiber warp knitting guide electric network in the net bag is in the wrapped carbon fiber warp knitting guide electric network on the periphery of the vertical reinforcement), so that the carbon fiber warp knitting guide electric network in the net bag is arranged in the wrapped carbon fiber warp knitting guide electric network on the periphery of the vertical reinforcement; the sandstone cushion layer is laid on the soft foundation, and a PVC drainage pipe network in the horizontal direction and a voltage-stabilizing direct-current power supply lead are also laid, so that the PVC drainage pipe in the vertical direction in the reinforcement body is communicated with the PVC drainage pipe network in the horizontal direction to form a complete drainage system; the voltage-stabilizing direct-current power supply lead is connected with the carbon fiber strip which spirally rises in the reinforcement; the voltage-stabilizing direct-current power supply wire is communicated with the direct-current power supply device, and a single anode mode and a cathode mode are adopted around the single anode.
In a second aspect, the invention provides a carbon fiber electroosmosis chain type vertical direction reinforcement structure and a method for processing a soft foundation thereof, which is characterized in that:
s1: wrapping the granular material with a carbon fiber warp knitting conductive net to form a net bag;
s2: connecting the net bags into a spatial regular tetrahedron frame structure, fully stirring, and then sinking into a reinforcing body of the carbon-containing fiber strip and the PVC drainage pipe in the vertical direction;
s3: paving a sand-stone cushion layer on the soft soil foundation to form a composite foundation;
s4: connecting a PVC drain pipe in the reinforcing body in the vertical direction with a PVC drain pipe in the sandstone cushion layer to form a drainage system;
s5: connecting the double-helix ascending carbon fiber strips in the reinforcing body in the vertical direction with a voltage-stabilizing direct-current power supply lead to form electroosmosis;
after the steps, when the underground water is reduced to be below the designed water level, the direct current is stopped to be introduced, the static load test is adopted to check the reinforcing effect, and after the bearing capacity meets the design requirement, the upper engineering construction is carried out.
Firstly, wrapping a granular material with a carbon fiber warp knitting guide electric net to form a net bag, connecting the net bag with a carbon fiber chain to form a spatial regular tetrahedral frame structure, and then laying the carbon fiber warp knitting guide electric net on the inner wall of a steel sleeve; drilling a hole in a soft soil foundation by using a light drilling machine, sinking the inner wall of the hole to lay a steel sleeve of a carbon fiber warp-knitted power grid after the hole is formed, fully stirring a regular tetrahedron frame structure connected by carbon fiber strips, and sinking the regular tetrahedron frame structure into a reinforcement hole of a carbon fiber strip and a PVC drain pipe in the vertical direction; secondly, paving a gravel cushion layer on the soft soil foundation to form a composite foundation, paving a horizontal PVC drain pipe in the gravel cushion layer, and communicating the horizontal PVC drain pipe paved in the gravel cushion layer with a PVC drain pipe in the chain type vertical direction reinforcement body to form a complete drainage system, so that water in the chain type vertical direction reinforcement body structure is quickly drained; finally, the double-helix ascending carbon fiber strips in the chain type vertical direction reinforcement body are connected with a voltage-stabilizing direct-current power supply lead to form electroosmosis, a single anode is adopted in the connection mode, and a cathode strategy is adopted around the anode; and stopping introducing the direct current when the underground water falls below the designed water level, checking the reinforcing effect by adopting a static load test, and performing upper structure construction after the bearing capacity meets the design requirement.
The technical construction method of the carbon fiber electroosmosis chain type vertical direction reinforcement soft foundation treatment method mainly comprises the following technical steps:
(1) the schematic diagram of the carbon fiber warp knitting conductive net wrapping the granular material is shown in fig. 1, the granular material is wrapped by the carbon fiber warp knitting conductive net to form a net bag, and the net bag is connected by a carbon fiber chain to form a spatial regular tetrahedron frame structure;
(2) the structural arrangement schematic diagram of the chain-type vertical-direction reinforcement of the carbon fiber warp-knitted conductive network is shown in fig. 3, firstly, the carbon fiber warp-knitted conductive network is laid on the inner wall of the steel sleeve, the length of the carbon fiber warp-knitted conductive network is 100-200 mm longer than that of the chain-type vertical-direction reinforcement, and the ends of the carbon fiber warp-knitted conductive network are connected together in a mechanical meshing mode. The width of the carbon fiber warp-knitted conducting net is larger than the perimeter of the reinforcement in the chain type vertical direction by 100-200 mm, and the ends of the carbon fiber warp-knitted conducting net are connected together in a mechanical meshing mode. Secondly, adopting light-duty drilling equipment to drill, clear the hole and inspect the pore-forming quality, sinking the steel sleeve, laying the carbon fiber strip and the vertical direction PVC drain pipe of double helix rising structure, after will using the regular tetrahedron frame construction intensive mixing of carbon fiber chain connection, sink into the granular material that makes vertical direction reinforcement structure rise design height at every turn as required, vibrating equipment vibrates, after vibrating closely knit, slowly extracts the steel sleeve, repeats above operation, until ground, forms the vertical direction reinforcement structure of chain. The deviation of the central position of the chain type vertical direction reinforcement structure should not exceed 20mm, the granular aggregate is hard in texture, has certain strength, good water stability, difficult weathering and good gradation, the mud content is less than 5 percent, and the upward pulling height of the steel sleeve is strictly controlled;
(3) laying a gravel cushion layer on the soft soil foundation to form a composite foundation, coordinating deformation, reducing foundation settlement, and laying a horizontal PVC drainage pipe network while laying the gravel cushion layer. Laying a sand-stone cushion layer as a geotechnical reinforced sand-stone material, reserving a horizontal PVC drain pipe groove according to design requirements, laying a coarse sand cushion layer in the groove, putting the horizontal PVC drain pipe into the groove, connecting the PVC drain pipe and auxiliary components thereof to form a network, wherein the thickness of the sand-stone cushion layer is 400-500 mm, adopting a back laying method, laying a bottom layer firstly, tamping, striking off, laying a coarse sand cushion layer in broken stones, laying a medium coarse sand cushion layer, tamping, striking off, and finishing the laying of the sand cushion layer. The particle size is 20-50 mm, and the mud content in the sandstone cushion layer is not more than 5%;
(4) and communicating the horizontal PVC drain pipe in the sandstone cushion layer with the vertical PVC drain pipe in the chain type vertical direction reinforcement to form a complete drainage system, so that water in the chain type vertical direction reinforcement is quickly drained. The end part of a horizontal PVC drainage pipe reserved in the gravel cushion layer is communicated with a vertical PVC drainage pipe in the chain type vertical direction reinforcing body, a groove is backfilled, tamping and scraping are carried out, and a horizontal PVC drainage pipe network in the gravel cushion layer, the vertical PVC drainage pipe in the chain type vertical direction reinforcing body and auxiliary components thereof form a complete drainage system;
(5) connecting double-helix ascending carbon fiber strips in the chain type vertical direction reinforcement body with a voltage-stabilizing direct-current power supply lead (the voltage is 30-60V) to form electroosmosis, adopting a single anode connection, adopting a cathode strategy around the anode, starting the voltage-stabilizing direct-current power supply, outputting direct current, and adjusting the electrifying interruption time length and the electromotive force of the voltage-stabilizing direct-current power supply according to the requirement of the drainage rate and the water content;
(6) after the steps, when the underground water is reduced to a level below the water level required by the design, the direct current is stopped to be introduced, a static load test is adopted to test the reinforcing effect of the chain type vertical direction reinforcement structure based on the carbon fiber electroosmosis technology and the soft foundation treatment method, and after the bearing capacity meets the design requirement, the upper structure construction is carried out.
The invention has the following beneficial effects and advantages:
the invention has the advantages of both the vertical reinforcement composite foundation and the electroosmosis method for treating the soft soil foundation, realizes the drainage consolidation and vertical reinforcement of the soft foundation into an integrated structure and achieves one-step operation, has higher treatment effect in the aspect of reinforcement compared with the traditional gravel pile, and greatly improves the permeation efficiency in the aspect of accelerating the drainage of the soft soil compared with the common drainage; the vertical direction reinforcement structure is porous, so that the electroosmosis drainage speed can be accelerated, the carbon fiber warp-knitted conductive net is used as an electrode material to accelerate electroosmosis drainage, and the vertical direction reinforcement structure has the function of restraining lateral expansion of the vertical direction reinforcement structure, so that the bearing capacity is improved. The method is applied to the treatment of large-area soft foundation with short construction period, deep soft soil, high sedimentation and bearing capacity requirements, such as soft soil foundation of expressways, railways and airports. The method specifically comprises the following steps:
1. the fillers of the chain type vertical direction reinforcement structure are selected from construction waste recycled aggregate, the mechanical properties of the construction waste recycled aggregate and the broken stone are almost the same, the construction waste is secondarily utilized while the engineering quality requirement is met, the engineering cost is reduced, and the environment pollution caused by the construction waste is avoided.
2. The granular material is wrapped by the carbon fiber warp-knitted conductive grid to form a net bag, the net bag has a constraint effect on the granular material, the net bag is connected into a tetrahedral frame structure by adopting a carbon fiber strip chain, and after the tetrahedral frame structure is fully realized, the regular tetrahedral frame structure is mutually occluded to form an integral structure, so that the integrity of the granular material wrapped by the carbon fiber warp-knitted conductive grid is improved, the lateral expansion is reduced, and the granular material has high porosity, and is favorable for quickly discharging free water in soft soil.
3. The carbon fiber is a very stable material, the carbon fiber strip is used as an electrode material, and the carbon fiber strip is not electrolyzed under the condition of electrification; the corrosion of electrode materials in the electroosmosis process is avoided, the electrode generates colloid through electrolysis, the problem that the later stage drainage rate is influenced due to the fact that certain chemical solution is added into the electroosmosis to generate colloid and the metal electrode is corroded is effectively solved, and the defects that the chemical solution is discharged in the drainage process, electrolyte is diluted, and the electroosmosis rate is weakened are overcome.
4. The carbon fiber warp-knitted conductive network has high strength, restrains the expansion of the chain type vertical direction reinforcement structure in the horizontal direction, and improves the bearing capacity of the chain type vertical direction reinforcement structure. The carbon fiber warp-knitted conductive network has excellent corrosion resistance, is not easy to corrode, and can effectively restrain the chain type vertical direction reinforcement structure for a long time.
5. The carbon fiber material has good conductivity and small resistivity, the generated heat is very small, the electric energy consumption is avoided, the intermittent direct current is adopted, the intermittent power-on time can be determined according to the actual construction period, the electric energy can be saved during the intermittent direct current power-on time, the pore water pressure in the foundation soil can be dissipated, the effective stress is increased, the saturated soil body is solidified, and the bearing capacity of the foundation soil is improved.
6. The carbon fiber strips in the chain type vertical direction reinforcement structure are connected with a voltage-stabilizing direct-current power supply, the single anode vertical direction reinforcement structure is adopted in the connection mode, and the strategy of cathodes is adopted around the anode vertical direction reinforcement structure.
7. The electroosmosis method for reinforcing the soft soil foundation has the defects of long treatment period, limited improvement on the strength of the soft soil foundation and the like. The electroosmosis method is combined with the chain type vertical direction reinforcement structure, so that the treatment period can be shortened, and the defect of limited strength of soft soil foundation treatment by the electroosmosis method can be overcome due to the fact that the chain type vertical direction reinforcement has certain bearing capacity.
8. Chemical solution is not added in the electroosmosis process, pollution gas is not generated, the soil body is not polluted, and the method is environment-friendly.
In conclusion, the invention has the advantages of accelerating the drainage rate of the soft soil foundation, shortening the consolidation period, improving the bearing capacity of the chain type vertical direction reinforcement body, protecting the environment, being simple in construction and the like. The invention is used for treating the deep soft soil foundation in the low-lying valley region, has technical and economic advantages, shortens the consolidation time of the soft soil foundation, shortens the construction period, reduces the equipment lease capital while ensuring that the bearing capacity of the foundation meets the design requirement, has good application prospect, does not have a report of a chain type vertical direction reinforcement structure based on the carbon fiber electroosmosis technology and a soft foundation treatment method at present, and is mainly applied to the treatment of large-area soft foundations with short construction period, deep soft soil and higher requirement, such as expressways, railways and airports.
Drawings
FIG. 1 is a schematic diagram of a chain-linked carbon fiber warp-knitted conductive mesh wrapped with a particulate material according to the present invention;
FIG. 2 is a schematic cross-sectional view of a carbon fiber warp-knitted conductive mesh wrapped granular material 1-1 according to the present invention;
FIG. 3 is a schematic diagram of the arrangement of a vertical reinforcement structure of a carbon fiber warp-knitted conductive grid according to the invention;
FIG. 4 is a schematic view of a chained vertical stiffener electrode connection according to the present invention;
FIG. 5 is a schematic view of a PVC drainpipe network arrangement according to the present invention;
FIG. 6 is a schematic cross-sectional view of a chain-type vertical direction reinforcement structure according to the present invention;
FIG. 7 is a detailed construction drawing of the present invention;
FIG. 8 is a detailed view of the chain-type vertical reinforcement structure of the present invention.
In the figure: 1. 2, a bulk material, 3, a carbon fiber warp-knitted power grid, 4, a voltage-stabilizing direct current power supply lead, 5, a reinforcement, 5-1, a cathode reinforcement, 5-2, an anode reinforcement, 6, a PVC drain pipe, 7, a sand-stone cushion layer, 8 and inter-pile soil.
Detailed Description
The invention will be further explained in detail with reference to the drawings and the embodiments.
Example 1
The carbon fiber electroosmosis chain type vertical direction reinforcement soft foundation treatment method in the embodiment specifically comprises the following construction steps:
s1: a schematic diagram of a chain-connected carbon fiber warp knitting conductive net wrapping a granular material is shown in fig. 1, the granular material 1 is wrapped by a carbon fiber warp knitting conductive net 2 to form a net bag, carbon fiber strips 3 are used for chain-connecting the net bag to form a spatial regular tetrahedron frame structure, and the granular material 1 is building waste recycled aggregate;
s2: the structural arrangement schematic diagram of the chain-type vertical-direction reinforcement of the carbon fiber warp-knitted conductive net is shown in fig. 3, the length of the carbon fiber warp-knitted conductive net 2 is larger than the length of the chain-type vertical-direction reinforcement by 100-200 mm, and the ends of the carbon fiber warp-knitted conductive net 2 are connected together in a mechanical meshing mode. The width of the carbon fiber warp knitting and conducting network 2 is larger than the perimeter of the chain type reinforcement body in the vertical direction by 100-200 mm, the ends of the carbon fiber warp knitting and conducting network 2 are connected together in a mechanical engagement mode to form a cylinder shape, and the carbon fiber warp knitting and conducting network 2 is laid on the inner wall of the steel sleeve;
s3: adopt light-duty drilling equipment drilling, clear hole and check pore-forming quality, sink the inner wall and lay the steel sleeve of carbon fiber warp knitting guide wire net 2, after will using the regular tetrahedron frame construction intensive mixing in space of 3 chain connections of carbon fiber strip, sink according to the requirement and make the granular material 1 that looses of the design height that vertical direction reinforcement structure rised at every turn, lay the carbon fiber strip 3 and the vertical direction PVC drain pipe of two spiral rising structure when sinking granular material 1 that looses, vibrating equipment vibrates, vibrate closely knit back, slowly extract the steel sleeve, repeat above operation, until ground, form the vertical direction reinforcement structure of chain. The deviation of the central position of the chain type vertical direction reinforcement structure should not exceed 20mm, the aggregate of the granular particles 1 is hard, has certain strength, good water stability, difficult weathering and good gradation, the mud content is less than 5 percent, and the upward pulling height of the steel sleeve is strictly controlled;
s4: and paving the gravel cushion 7 on the soft soil foundation to form a composite foundation, coordinating deformation, reducing foundation settlement, and paving the horizontal PVC drain pipe 6 pipe network while paving the gravel cushion 7. Laying a sand-stone cushion layer 7 as a geotechnical reinforced sand-stone material, reserving a groove of a horizontal PVC drain pipe 6 according to design requirements, laying a coarse sand cushion layer in the groove, putting the horizontal PVC drain pipe 6 into the groove, connecting the horizontal PVC drain pipe 6 and auxiliary components thereof to form a network, reserving a joint for connecting the vertical PVC drain pipe 6, wherein the thickness of the sand-stone cushion layer 7 is 500mm, laying a bottom layer with the thickness of 150mm by adopting a back laying method, tamping and striking off, then laying crushed stones with the thickness of 150mm and a medium coarse sand cushion layer, laying crushed stones with the thickness of 200mm and a medium coarse sand cushion layer, tamping and striking off, and finishing laying the sand-stone cushion layer 7. The grain diameter is 20-50 mm, and the mud content in the sandstone cushion layer 7 is not more than 5%;
s5: the horizontal PVC drain pipe 6 pipe network in the sandstone cushion layer 7 is communicated with the vertical PVC drain pipe 6 in the chain type vertical direction reinforcement body to form a complete drainage system, so that water in the chain type vertical direction reinforcement body is rapidly discharged. The joint of a horizontal PVC drain pipe 6 reserved in the sandstone cushion layer 7 is communicated with a vertical PVC drain pipe 6 in the chain type vertical direction reinforcing body, and a horizontal PVC drain pipe 6 pipe network in the sandstone cushion layer 7, the vertical PVC drain pipe 7 in the chain type vertical direction reinforcing body and accessory components thereof form a complete drainage system;
s6: connecting a carbon fiber strip 3 with double helix rising at the top end of the chain type vertical direction reinforcement body with a voltage stabilizing direct current power supply lead 4 (the voltage is 30-60V) to form electroosmosis, wherein a single anode is adopted for connection, the periphery of the anode is a cathode strategy, attention is paid to the connection of the anode and the cathode of the voltage stabilizing direct current power supply with the carbon fiber strip 3 with double helix rising at the top end of the chain type vertical direction reinforcement body, after the connection is completed, the voltage stabilizing direct current power supply is started, direct current is output, and the electrifying interruption duration and the size of electromotive force of the voltage stabilizing direct current power supply are adjusted according to the requirement of the drainage rate and the quantity of water content;
s7: after the steps, when the underground water is reduced to be below the designed water level, the power supply is turned off, the direct current is stopped to be introduced, the static load test is adopted to test the reinforcing effect, and after the bearing capacity meets the design requirement, the upper engineering construction is carried out.
According to the invention, the carbon fiber warp-knitted conductive net wraps the construction waste recycled aggregate to form the net bag, the net bag is connected in a chain manner to form a spatial regular tetrahedron frame structure, and after the regular tetrahedron frame structure is fully stirred, the spatial regular tetrahedron frame structure forms a chain type integral structure which is meshed with each other, so that the integrity is improved. Under the same energy consumption, the single anode strategy is adopted, the underground water in the soft soil foundation is reduced to the maximum extent, and the underground water in the soft soil foundation is effectively and quickly reduced, so that the drainage efficiency is improved, and the consolidation is accelerated.
The above embodiments are merely illustrative of the technical solutions of the present invention. The embodiment provides a carbon fiber electroosmosis chain type vertical direction reinforcement structure and a soft foundation treatment method thereof, which can accelerate the consolidation and drainage efficiency of a soft soil foundation, shorten the construction period, reduce the construction cost, restrain the lateral expansion of the chain type vertical direction reinforcement, improve the bearing capacity and reduce the post-construction settlement.
Claims (10)
1. A carbon fiber electroosmosis chain type vertical direction reinforcement structure is characterized in that: the device comprises a granular material (1), a plurality of carbon fiber warp-knitted conductive nets (2), a plurality of double-helix ascending carbon fiber strips (3), a plurality of voltage-stabilizing direct-current power supply leads (4), a plurality of PVC drain pipes (6) and a sandstone cushion layer (7);
the PVC drain pipes (6) comprise PVC drain pipes (6) arranged in the vertical direction and PVC drain pipes (6) arranged in the horizontal direction; the PVC drain pipes (6) arranged in the horizontal direction form a PVC drain pipe network in the horizontal direction;
the carbon fiber warp-knitted conductive net (2) wraps the granular material (1) to form a net bag; the carbon fiber strips (3) are connected with the net bag to form a spatial regular tetrahedral frame structure; after the spatial regular tetrahedron structure is fully stirred, the carbon fiber strips connected between the net bag and the net bag are mutually wound to form a mutually meshed whole; then the carbon fiber strips are put into the reinforcement holes of the reinforcement (5), the carbon fiber strips (3) rising in a double helix are laid as electrode materials, and the PVC drainage pipe (6) in the vertical direction is laid as a drainage device in the reinforcement (5); a layer of carbon fiber warp knitting electricity conducting net (2) is wrapped on the periphery of the vertical reinforcement (5), so that the carbon fiber warp knitting electricity conducting net (2) in the net bag is arranged inside the carbon fiber warp knitting electricity conducting net (2) wrapped on the periphery of the vertical reinforcement (5);
the sandstone cushion layer (7) is laid on the soft foundation, and a PVC drainage pipe network in the horizontal direction and a voltage-stabilizing direct-current power supply lead (4) are also laid, so that a PVC drainage pipe (6) in the vertical direction in the reinforcement body (5) is communicated with the PVC drainage pipe network in the horizontal direction to form a complete drainage system; the voltage-stabilizing direct-current power supply lead (4) is connected with the spirally-rising carbon fiber strip (3) in the reinforcement (5); the voltage-stabilizing direct-current power supply lead (4) is communicated with a direct-current power supply device, and adopts a mode of single anode and cathode around.
2. A method of treating a soft foundation with a carbon fiber electroosmotic chain vertical reinforcement structure according to claim 1, comprising: comprises the following steps:
s1: wrapping the granular material with a carbon fiber warp knitting conductive net to form a net bag;
s2: connecting the net bags into a spatial regular tetrahedron frame structure, fully stirring, and then sinking into a reinforcing body of the carbon-containing fiber strip and the PVC drainage pipe in the vertical direction;
s3: paving a sand-stone cushion layer on the soft soil foundation to form a composite foundation;
s4: connecting a PVC drain pipe in the reinforcing body in the vertical direction with a PVC drain pipe in the sandstone cushion layer to form a drainage system;
s5: connecting the double-helix ascending carbon fiber strips in the reinforcing body in the vertical direction with a voltage-stabilizing direct-current power supply lead to form electroosmosis;
after the steps, when the underground water is reduced to be below the designed water level, the direct current is stopped to be introduced, the static load test is adopted to check the reinforcing effect, and after the bearing capacity meets the design requirement, the upper engineering construction is carried out.
3. The method of treating a soft foundation with a carbon fiber electroosmotic chain vertical reinforcement structure according to claim 2, wherein:
in the step S1, the granular material is construction waste recycled aggregate;
in the step S2, the reinforcing body in the vertical direction is wrapped by a carbon fiber warp-knitted conductive net;
the sand-stone cushion layer in the step S3 is made of geotechnical reinforcement sand-stone materials;
the reinforcement in the vertical direction in the step S4 is communicated with a PVC drain pipe laid in the gravel cushion;
in the step S5, a single anode and a cathode are connected.
4. A method for treating a soft foundation with a carbon fiber electroosmotic chain-type vertical reinforcement structure according to claim 2 or 3, wherein:
the step S1 specifically includes: the granular material is wrapped by a carbon fiber warp knitting electric conduction net to form a net bag, and the net bag is connected by a carbon fiber chain to form a regular tetrahedron frame structure.
5. A method for treating a soft foundation with a carbon fiber electroosmotic chain-type vertical reinforcement structure according to claim 2 or 3, wherein:
the step S2 specifically includes: firstly, laying a carbon fiber warp-knitted power grid on the inner wall of a steel sleeve, sinking into a vertical direction reinforcing body formed by a pre-formed hole, and laying a carbon fiber strip with a double-spiral rising structure and a vertical direction PVC drain pipe; secondly, after fully stirring the spatial regular tetrahedron frame structures connected by the carbon fiber strips, sinking into the vertical direction reinforcement body to form a chain type vertical direction reinforcement body structure; the deviation of the central position of the chain type vertical direction reinforcement structure is not more than 20mm, the granular aggregate is hard in texture, high in strength, good in water stability, not easy to weather and good in gradation, the mud content is less than 5%, and the upward pulling height of the steel sleeve is strictly controlled.
6. The method of treating a soft foundation with a carbon fiber electroosmotic chain vertical reinforcement structure according to claim 4, wherein:
the step S2 specifically includes: firstly, laying a carbon fiber warp-knitted power grid on the inner wall of a steel sleeve, sinking into a vertical direction reinforcing body formed by a pre-formed hole, and laying a carbon fiber strip with a double-spiral rising structure and a vertical direction PVC drain pipe; secondly, after fully stirring the regular tetrahedron frame structures connected by the carbon fiber strips, sinking into the vertical direction reinforcement body to form a chain type vertical direction reinforcement body structure; the deviation of the central position of the chain type vertical direction reinforcement structure should not exceed 20mm, the granular aggregate is hard in texture, high in strength, good in water stability, not prone to weathering and good in gradation, the mud content is less than 5%, and the upward pulling height of the steel sleeve is strictly controlled.
7. The method of treating a soft foundation with a carbon fiber electroosmotic chain vertical reinforcement structure according to claim 2, 3 or 6, wherein: the step S3 specifically includes: paving a gravel cushion layer on the soft soil foundation to form a composite foundation, coordinating deformation, reducing foundation settlement, and paving a horizontal PVC drain pipe network while paving the gravel cushion layer; the paved gravel cushion layer is made of geotechnical reinforced gravel materials, wherein the thickness of the gravel cushion layer is 400-500 mm, the particle size is 20-50 mm, and the mud content in the gravel cushion layer is not more than 5%.
8. The method of treating a soft foundation with a carbon fiber electroosmotic chain vertical reinforcement structure according to claim 2, 3 or 6, wherein: the step S4 specifically includes: and communicating a horizontal PVC drain pipe network laid in the sandstone cushion layer with PVC drain pipes in the chain type vertical direction reinforcement to form a complete drainage system, so that free water in the chain type vertical direction reinforcement structure is quickly discharged.
9. The method of treating a soft foundation with a carbon fiber electroosmotic chain vertical reinforcement structure according to claim 7, wherein: the step S4 specifically includes: and the PVC drain pipes laid in the gravel cushion layer communicate the horizontal PVC drain pipes laid in the gravel cushion layer with the PVC drain pipes in the chain type vertical direction reinforcement body to form a complete drainage system, so that free water in the chain type vertical direction reinforcement body structure is quickly discharged.
10. The method of treating a soft foundation with a carbon fiber electroosmotic chain vertical reinforcement structure according to claim 2 or 3 or 6 or 9, wherein: the step S5 specifically includes: connecting carbon fiber strips in the chain type vertical direction reinforcement with a voltage-stabilizing direct-current power supply lead in a single anode manner, wherein the periphery of the anode is provided with a cathode strategy; the voltage is 30-60V; the output current of the voltage-stabilized DC power supply adjusts the electrifying interruption duration and the electromotive force of the voltage-stabilized DC power supply according to the requirement of the drainage rate and the water content.
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