CN112359810A - Isolated reinforcement method based on soft soil foundation - Google Patents
Isolated reinforcement method based on soft soil foundation Download PDFInfo
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- CN112359810A CN112359810A CN202011298117.4A CN202011298117A CN112359810A CN 112359810 A CN112359810 A CN 112359810A CN 202011298117 A CN202011298117 A CN 202011298117A CN 112359810 A CN112359810 A CN 112359810A
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- 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
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- 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
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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- 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
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Abstract
The invention discloses an isolated reinforcement method based on soft soil foundation, belonging to the technical field of foundation reinforcement, the invention can form an isolated cladding to protect the precast pile from water seepage by filling an isolated filler outside the precast pile through a precast pile reinforcement mode, and form an integral body with the precast pile in a mode of pouring concrete after excavating the surface of the foundation, simultaneously, an isolator is pre-embedded in the isolated cladding to detect the groundwater seepage phenomenon, once the seepage phenomenon occurs, a guide mode is adopted to trigger the feedback action of the isolator, the magnetomotive microcapsule is utilized to block the seepage area, on one hand, water in the seepage area is forced to be rapidly condensed into ice, not only further seepage of water can be blocked, but also the seepage area can be temporarily reinforced, the strength reduction phenomenon is improved, on the other hand, technical personnel can be prompted to treat in time through temperature change, construction cost and difficulty are lower, are showing reinforcement effect and the efficiency of construction that improves the ground.
Description
Technical Field
The invention relates to the technical field of foundation reinforcement, in particular to an isolated reinforcement method based on a soft soil foundation.
Background
The foundation refers to the soil or rock mass of the supporting foundation under the building. Soil layers as building foundations are divided into rocks, gravel soil, sandy soil, silt soil, cohesive soil and artificial filling soil. The foundation includes a natural foundation and an artificial foundation (composite foundation). Natural foundations are layers of natural soil that do not require human reinforcement. The artificial foundation needs reinforcement treatment by people, and a stone chip cushion layer, a sand cushion layer, mixed lime-soil backfill, tamping and the like are common.
Before the existing building foundation and foundation are reinforced, the foundation and foundation are firstly identified, so that the reinforcement design and the identification, reinforcement design and construction of the existing building foundation and foundation can be carried out, and the reinforcement design and construction can be born by units with corresponding qualifications and experienced professional technicians.
The soft soil is fine soil deposited on coastal areas, lakes and marshes, valley areas and beaches and having high natural water content, large pore ratio, high compressibility and low shear strength. The method has the characteristics of high natural water content, large natural pore ratio, high compressibility, low shear strength, small consolidation coefficient, long consolidation time, high sensitivity, high disturbance, poor water permeability, complex layered distribution of soil layers, large difference of physical and mechanical properties among layers and the like, and the definition of the national highway industry standard on the soft soil foundation refers to the soft soil layer with low strength and high compressibility and most of the soft soil layer contains certain organic substances. Because the soft soil has low strength and large sinking and hiding amount, great harm is often brought to road engineering, and if the treatment is improper, great influence is caused to the construction and the use of a road.
The existing foundation reinforcing method is mainly characterized in that a foundation is tamped by a dynamic compactor, but when the existing dynamic compactor is used for tamping a foundation with high water content, the efficiency is low, the work time waste phenomenon is serious, and the whole construction period process is influenced.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide an isolated reinforcement method based on a soft soil foundation, which can be used for protecting the precast pile from water seepage by filling an isolated filler outside the precast pile in a precast pile reinforcement mode, forming an isolated coating to form an isolated layer, forming a whole with the precast pile in a concrete pouring mode after excavating on the surface of the foundation, indirectly improving the bearing capacity of the precast pile and simultaneously improving the contact area with the foundation so as to improve the reinforcement effect, meanwhile, pre-embedding an isolating piece in the isolated coating to detect the groundwater seepage phenomenon, triggering the feedback action of the isolating piece in a guiding mode once the water seepage phenomenon occurs, plugging the water seepage area by utilizing magnetic microcapsules, forcing the water in the seepage area to be rapidly condensed into ice on one hand, not only preventing the water from further seepage, but also temporarily reinforcing the seepage area, the strength reduction phenomenon is improved, on the other hand, technicians are timely prompted to carry out treatment through temperature change, the construction cost and the difficulty are low, and the reinforcement effect and the construction efficiency of the foundation are remarkably improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
An isolated reinforcement method based on a soft soil foundation comprises the following steps:
s1, excavating 20-40cm deep top covering pits on the surface of the area to be reinforced, and then excavating 1 root/10 m in the top covering pits2Uniformly drilling a plurality of reinforcing pile holes;
s2, installing a pile casing to shape the reinforced pile hole, processing a precast pile in a factory in advance, and transporting to a site to hoist the precast pile into the pile casing;
s3, temporarily positioning the precast pile, then taking out the pile casings one by one, ensuring that the hole collapse phenomenon is avoided in the process, and injecting an isolation filler into the hole between the precast pile and the pile reinforcing hole after the pile casings are completely taken out;
s4, forming an isolation cladding after injecting and densely filling an isolation filler, removing temporary positioning, installing a pile cap reinforcement cage at the opening of a reinforced pile hole on site, and welding the pile cap reinforcement cage and the top of the precast pile into a whole;
and S5, pouring waterproof concrete into the top covering pit, vibrating to be compact to ensure one-time pouring forming, and spraying water to cover the film after finishing the pouring and curing until the specified strength is reached.
Further, in the step S1, the top cover pit should be cleaned after excavation, and then tamped, and the reinforced pile hole adopts the jump excavation mode when drilling, so that the construction influence in the previous stage is reduced to the maximum extent, and the foundation reinforcement effect is indirectly improved.
Further, in the step S2, the installation of the pile casing and the drilling of the reinforcing pile hole are performed simultaneously, and the pile casing is made of stainless steel, the thickness of the pile casing is kept at 5-10cm, so that the hole type stability of the reinforcing pile hole is fully ensured, and the hole collapse phenomenon is avoided.
Further, the precast pile is including consolidating the main part, extending head and anchor point tail, and extends head and anchor point tail and connect both ends and keep integrated into one piece about consolidating the main part respectively, consolidates the main reinforcement effect to the ground, extends the head and extends and consolidate stake hole easy to assemble steel reinforcement cage, and can not lead to the fact the interference to keeping apart the covering, and anchor point tail can be more deep insert to the ground depths, improves precast pile's stability.
Further, the isolation filler in the step S3 includes the following raw materials in parts by weight: 50-70 parts of cement mortar, 20-40 parts of hydrophobic silicon dioxide, 2-5 parts of polypropylene fiber, 10-20 parts of fly ash, 15-25 parts of ceramic chip and 1-3 parts of dispersing agent.
Further, the isolation cladding in step S4 is formed in a segmented manner, and each segment is provided with a plurality of spacers distributed in an annular array, each spacer comprises a trigger ball and a guide fiber tube connected to the upper end and the lower end of the trigger ball, the trigger ball is communicated with the guide fiber tube, the spacers can sense the water seepage phenomenon in the isolation cladding, the guide fiber tubes guide the seepage water to the trigger ball, and then the spacers trigger the isolation action to prevent the water from further permeating and entering the precast pile.
Further, it has water-soluble package to trigger the ball intussuseption and be filled with, water-soluble package adopts water-soluble material to make, it has a plurality of evenly distributed's magnetic microcapsule to inlay in the water-soluble package, magnetic microcapsule intussuseption is filled with nitre stone powder and magnetic, and water-soluble package plays isolation and guard action to magnetic microcapsule under normal condition, resumes magnetic microcapsule's freedom after water-soluble package dissolves under the infiltration state, and magnetic microcapsule can independently move and trigger the shutoff action, and nitre stone powder in the magnetic microcapsule can absorb a large amount of heats when dissolving water, not only can force the water in the infiltration area rapidly to condense into ice, can block the further infiltration of water, can temporarily strengthen the infiltration area simultaneously, improve the decline phenomenon of intensity.
Further, the guide fiber pipe includes that the cavity inlays pipe, a plurality of water accuse magnetic ball and water guide fiber silk, the cavity inlays and manages and set up a plurality of evenly distributed's the hole of permeating water, and water accuse magnetic ball inlays and connects in permeating water downthehole, water guide fiber silk and water accuse magnetic ball are connected and extend to in the isolation covering, and water guide fiber silk distributes in isolation covering perception infiltration water, then carry infiltration water to water accuse magnetic ball department, can realize the pertinence and carry out the shutoff to the infiltration region.
Furthermore, the water control magnetic ball comprises a magnetic hemisphere, a magnetism isolating hemisphere and a plurality of felting needles, the magnetic hemisphere is symmetrically connected with the magnetism isolating hemisphere, the magnetism isolating hemisphere is connected to the inner side of the magnetic hemisphere, the felting needles are uniformly embedded in the magnetism isolating hemisphere and connected with the inner surface of the magnetic hemisphere, the magnetism isolating hemisphere is prepared by mixing iron-nickel alloy powder and effervescent disintegrant according to the mass ratio of 1:1, the felting needles can rapidly react after meeting water, the effervescent disintegrant can release a large amount of gas during reaction, the iron-nickel alloy powder is rapidly blown away to avoid gathering on the surface of the magnetic hemisphere, the magnetic hemisphere can absorb the magnetic microcapsules recovering the free state to be matched after losing the magnetic shielding effect of the magnetism isolating hemisphere, and the magnetic microcapsules are punctured by the felting needles to release internal saltpeter powder.
Further, before pouring waterproof concrete in step S5, reserve the maintenance sleeve that a plurality of annular array distribute around the precast pile, and overhaul the sleeve lower port and aim at the isolation covering, the upper port seals, and internally mounted has temperature sensor, and the technical staff can judge according to temperature sensor' S temperature variation and keep apart the interior infiltration phenomenon that takes place of covering, then takes corresponding treatment through the maintenance sleeve.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme can form an isolation cladding to perform water seepage protection on the precast pile by a precast pile reinforcing mode and filling isolation fillers outside the precast pile, and the precast pile are integrated by a mode of pouring concrete after excavation on the surface of the foundation, so that the bearing capacity of the precast pile is indirectly improved, and simultaneously, the contact area with the foundation is improved, thereby improving the reinforcing effect, meanwhile, the underground water seepage phenomenon is detected by pre-embedding the partition in the isolation cladding, once the water seepage phenomenon occurs, the feedback action of the partition is triggered by adopting a guiding mode, the water seepage area is blocked by utilizing the magnetomotive microcapsule, on one hand, the water in the water seepage area is forced to be rapidly condensed into ice, not only the further seepage of water can be blocked, but also the water seepage area can be temporarily reinforced, the strength decline phenomenon is improved, on the other hand, technical personnel are prompted to perform treatment in time through temperature, construction cost and difficulty are lower, are showing reinforcement effect and the efficiency of construction that improves the ground.
(2) The precast pile is including consolidating the main part, extending head and anchor point tail, and extends head and anchor point tail and connect both ends and keep integrated into one piece about consolidating the main part respectively, consolidates the main reinforcement effect to the ground, extends the reinforcement stake hole and facilitates the installation steel reinforcement cage of reinforcement head, and can not lead to the fact the interference to the isolation covering, and anchor point tail can be more deep insert to the ground depths, improves the stability of precast pile.
(3) The isolation cladding in step S4 is formed in a segmented mode, a plurality of isolation parts distributed in an annular array mode are put into each segment, each isolation part comprises a trigger ball and guide fiber pipes connected to the upper end and the lower end of each trigger ball, the trigger balls are communicated with the guide fiber pipes, the isolation parts can sense the water seepage phenomenon in the isolation cladding, the seepage water is guided to the trigger balls through the guide fiber pipes, then isolation action is triggered, and the moisture is prevented from further permeating and entering the precast pile.
(4) The trigger ball is filled with a water-soluble bag, the water-soluble bag is made of water-soluble substances, a plurality of uniformly distributed magnetic microcapsules are embedded in the water-soluble bag, saltpeter powder and magnetic powder are filled in the magnetic microcapsules, the water-soluble bag plays a role in isolating and protecting the magnetic microcapsules in a normal state, the freedom of the magnetic microcapsules is recovered after the water-soluble bag is dissolved in a water seepage state, the magnetic microcapsules can automatically act to trigger plugging action, the saltpeter powder in the magnetic microcapsules can absorb a large amount of heat when dissolving water, water in a water seepage and seepage area can be forced to be rapidly condensed into ice, further seepage of water can be prevented, meanwhile, the water seepage area can be temporarily strengthened, and the phenomenon of strength reduction is improved.
(5) The guide fiber pipe includes that the cavity inlays the pipe, a plurality of water accuse magnetic ball and water guide fiber silk, and the cavity inlays and sets up a plurality of evenly distributed's the hole of permeating water on managing, and water accuse magnetic ball inlays and connects in permeating water downthehole, and water guide fiber silk is connected with water accuse magnetic ball and extends to in keeping apart the cladding, and water guide fiber silk distributes in keeping apart cladding perception infiltration water, then carries infiltration water to water accuse magnetic ball department, can realize the pertinence and carry out the shutoff to the infiltration region.
(6) The water control magnetic ball comprises a magnetic hemisphere, a magnetism isolating hemisphere and a plurality of felting needles, wherein the magnetic hemisphere is symmetrically connected with the magnetism isolating hemisphere, the magnetism isolating hemisphere is connected to the inner side of the magnetic hemisphere, the felting needles are uniformly embedded in the magnetism isolating hemisphere and connected with the inner surface of the magnetic hemisphere, the magnetism isolating hemisphere is prepared by mixing iron-nickel alloy powder and an effervescent disintegrant according to the mass ratio of 1:1, the felting needles can rapidly react after meeting water, the effervescent disintegrant can release a large amount of gas during reaction, the iron-nickel alloy powder is rapidly blown away to avoid being gathered on the surface of the magnetic hemisphere, and after the magnetic shielding effect of the magnetism isolating hemisphere is lost, the magnetic microcapsules which can be adsorbed and recovered to a free state are matched, and the felting needles are utilized to puncture the magnetic microcapsules to release internal saltpeter.
(7) Before the waterproof concrete is poured in the step S5, a plurality of maintenance sleeves distributed in an annular array mode are reserved around the precast pile, the lower end openings of the maintenance sleeves are aligned to the isolation cladding, the upper end openings of the maintenance sleeves are sealed, the temperature sensors are installed inside the maintenance sleeves, technicians can judge that water seepage occurs in the isolation cladding according to temperature changes of the temperature sensors, and then targeted treatment measures are taken through the maintenance sleeves.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure at A in FIG. 1;
fig. 3 is a schematic structural view of a precast pile according to the present invention;
FIG. 4 is a cross-sectional view of a portion of the spacer of the present invention;
FIG. 5 is a schematic structural view of the water control magnetic ball of the present invention.
The reference numbers in the figures illustrate:
the device comprises a precast pile 1, a reinforced body 11, an extension head 12, an anchoring sharp tail 13, an isolation cladding 2, a trigger ball 3, a guide fiber tube 4, a hollow embedded tube 41, a water control magnetic ball 42, a magnetic hemisphere 421, a magnetic isolation hemisphere 422, a felting needle 423, a water guide fiber wire 43, a water soluble bag 5 and a magnetic microcapsule 6.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, an isolated reinforcement method based on a soft soil foundation includes the following steps:
s1, excavating a top covering pit with the depth of 30cm on the surface of the area to be reinforced, and then excavating 1 root/10 m in the top covering pit2Uniformly drilling a plurality of reinforcing pile holes;
s2, installing a pile casing to shape the reinforced pile hole, processing a precast pile 1 in a factory in advance, and transporting to a site to hoist the precast pile into the pile casing;
s3, temporarily positioning the precast pile 1, then taking out the pile casings one by one, ensuring that the hole collapse phenomenon is avoided in the process, and injecting isolation fillers into the hole between the precast pile 1 and the pile reinforcing hole after the pile casings are completely taken out;
s4, forming an isolation cladding 2 after injecting and densely filling an isolation filler, removing temporary positioning, installing a pile cap reinforcement cage at the opening of a reinforced pile hole on site, and welding the pile cap reinforcement cage and the top of the precast pile 1 into a whole;
and S5, pouring waterproof concrete into the top covering pit, vibrating to be compact to ensure one-time pouring forming, and spraying water to cover the film after finishing the pouring and curing until the specified strength is reached.
In the step S1, after the top covering pit is excavated, residual soil blocks, rocks and garbage on the surface are cleaned, then tamping treatment is carried out, and the reinforced pile hole is drilled in a jumping excavation mode, so that the construction influence in the early stage is reduced to the maximum extent, and the foundation reinforcement effect is indirectly improved.
In the step S2, the installation of the pile casing and the drilling of the reinforced pile hole are synchronously carried out, the pile casing is made of stainless steel, the thickness is kept to be 10cm, the hole type stability of the reinforced pile hole is fully ensured, and the hole collapse phenomenon is avoided.
Please refer to fig. 3, the precast pile 1 includes a reinforcing body 11, an extending head 12 and an anchoring point tail 13, and the extending head 12 and the anchoring point tail 13 are respectively connected to the upper and lower ends of the reinforcing body 11 and are kept integrally formed, the reinforcing body 11 plays a main role of reinforcing the foundation, the extending head 12 extends out of the reinforcing pile hole to facilitate installation of a reinforcement cage, and does not interfere with the isolation cladding 2, and the anchoring point tail 13 can be more deeply inserted into the deep part of the foundation, so as to improve the stability of the precast pile 1.
The isolation filler in the step S3 comprises the following raw materials in parts by weight: 50 parts of cement mortar, 20 parts of hydrophobic silicon dioxide, 2 parts of polypropylene fiber, 10 parts of fly ash, 15 parts of ceramic chip and 1 part of dispersing agent.
Referring to fig. 2, in step S4, the isolation cladding 2 is formed in segments, and each segment is filled with a plurality of spacers distributed in an annular array, where the spacers include a trigger ball 3 and guide fiber tubes 4 connected to the upper and lower ends of the trigger ball 3, and the trigger ball 3 is communicated with the guide fiber tubes 4, and the spacers can sense the water seepage phenomenon in the isolation cladding 2, guide the seepage water to the trigger ball 3 through the guide fiber tubes 4, and then trigger an isolation action to prevent the water from further permeating and entering the precast pile 1.
Please refer to fig. 4, a water-soluble bag 5 is filled in the trigger ball 3, the water-soluble bag 5 is made of water-soluble substances, a plurality of uniformly distributed magnetic microcapsules 6 are embedded in the water-soluble bag 5, saltpeter powder and magnetic powder are filled in the magnetic microcapsules 6, the water-soluble bag 5 plays a role in isolating and protecting the magnetic microcapsules 6 in a normal state, the free state of the magnetic microcapsules 6 is recovered after the water-soluble bag 5 is dissolved in a water seepage state, the magnetic microcapsules 6 can automatically act to trigger plugging action, the saltpeter powder in the magnetic microcapsules 6 can absorb a large amount of heat when dissolving water, water in a water seepage area can be forced to be rapidly condensed into ice, further seepage of water can be prevented, meanwhile, the water seepage area can be temporarily strengthened, and the phenomenon of strength reduction is improved.
Guide fiber pipe 4 includes that the cavity inlays pipe 41, a plurality of water accuse magnetic ball 42 and water guide fiber silk 43, the hole of permeating water of a plurality of evenly distributed has been seted up on the cavity inlays pipe 41, and water accuse magnetic ball 42 inlays and connects in permeating water downthehole, water guide fiber silk 43 is connected with water accuse magnetic ball 42 and extends to in the isolation covering 2, water guide fiber silk 43 distributes in isolating 2 perception infiltration waters, then carry the infiltration water to water accuse magnetic ball 42 department, can realize the pertinence to the region shutoff that permeates water.
Referring to fig. 5, the water control magnetic ball 42 includes a magnetic hemisphere 421, a magnetism isolating hemisphere 422 and a plurality of needles 423, the magnetic hemisphere 421 is symmetrically connected to the magnetism isolating hemisphere 422, the magnetism isolating hemisphere 422 is connected to the inner side of the magnetic hemisphere 421, the needles 423 are uniformly embedded in the magnetism isolating hemisphere 422 and connected to the inner surface of the magnetic hemisphere 421, the magnetism isolating hemisphere 422 is made of iron-nickel alloy powder and effervescent disintegrant according to a mass ratio of 1:1, the needles 423 react rapidly when meeting water, the effervescent disintegrant releases a large amount of gas when reacting, the iron-nickel alloy powder is blown away rapidly to avoid being gathered on the surface of the magnetic hemisphere 421, the magnetic hemisphere 421 can absorb the magnetomotive microcapsule 6 which is restored to a free state to cooperate after losing the magnetic shielding effect of the magnetism isolating hemisphere 422, and the needles 423 are used for puncturing the magnetomotive microcapsule 6 to release the internal saltpeter powder.
Before the waterproof concrete is poured in the step S5, a plurality of maintenance sleeves distributed in an annular array mode are reserved around the precast pile 1, the lower end openings of the maintenance sleeves are aligned to the isolation cladding 2, the upper end openings of the maintenance sleeves are sealed, the temperature sensors are installed inside the maintenance sleeves, technicians can judge that the water seepage phenomenon occurs in the isolation cladding 2 according to the temperature change of the temperature sensors, and then targeted treatment measures are taken through the maintenance sleeves.
The invention can form an isolation covering layer 2 to perform water seepage protection on the precast pile 1 by a precast pile 1 reinforcing mode and filling isolation fillers at the outer side of the precast pile 1, and form a whole with the precast pile 1 by a mode of pouring concrete after excavating on the surface of a foundation, indirectly improve the bearing capacity of the precast pile 1 and simultaneously improve the contact area with the foundation so as to improve the reinforcing effect, simultaneously, the partition is pre-embedded in the isolation covering layer 2 to detect the permeation phenomenon of underground water, once the permeation phenomenon occurs, the feedback action of the partition is triggered by adopting a guiding mode, and the magnetomotive microcapsule 6 is utilized to block a water seepage area, on one hand, water in the water seepage area is forced to be rapidly condensed into ice, not only further permeation of water can be blocked, but also the water seepage area can be temporarily reinforced, the strength reduction phenomenon is improved, on the other hand, technical personnel can be prompted to perform treatment in time by temperature change, construction cost and difficulty are lower, are showing reinforcement effect and the efficiency of construction that improves the ground.
The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. An isolated reinforcement method based on a soft soil foundation is characterized in that: the method comprises the following steps:
s1, excavating 20-40cm deep top covering pits on the surface of the area to be reinforced, and then excavating 1 root/10 m in the top covering pits2Uniformly drilling a plurality of reinforcing pile holes;
s2, installing a pile casing to shape the reinforced pile hole, processing a precast pile (1) in a factory in advance, and transporting to a site to hoist the precast pile into the pile casing;
s3, temporarily positioning the precast pile (1), then taking out the pile casings one by one, and avoiding the hole collapse phenomenon in the process, and injecting an isolation filler into the hole between the precast pile (1) and the pile reinforcing hole after the pile casings are completely taken out;
s4, forming an isolation cladding (2) after injecting and densely filling an isolation filler, removing temporary positioning, installing a pile cap reinforcement cage at the opening of a reinforced pile hole on site, and welding the pile cap reinforcement cage and the top of the precast pile (1) into a whole;
and S5, pouring waterproof concrete into the top covering pit, vibrating to be compact to ensure one-time pouring forming, and spraying water to cover the film after finishing the pouring and curing until the specified strength is reached.
2. The isolated reinforcement method based on the soft soil foundation according to claim 1, characterized in that: and S1, after the top covering pit is excavated, cleaning residual soil blocks, rocks and garbage on the surface, then tamping, and drilling the reinforced pile hole in a jump excavation mode.
3. The isolated reinforcement method based on the soft soil foundation according to claim 1, characterized in that: and in the step S2, the installation of the pile casing and the drilling of the reinforced pile hole are synchronously carried out, the pile casing is made of stainless steel, and the thickness is kept to be 5-10 cm.
4. The isolated reinforcement method based on the soft soil foundation according to claim 1, characterized in that: the precast pile (1) comprises a reinforcing main body (11), an extension head (12) and an anchoring pointed tail (13), wherein the extension head (12) and the anchoring pointed tail (13) are respectively connected to the upper end and the lower end of the reinforcing main body (11) and are integrally formed.
5. The isolated reinforcement method based on the soft soil foundation according to claim 1, characterized in that: the isolation filler in the step S3 comprises the following raw materials in parts by weight: 50-70 parts of cement mortar, 20-40 parts of hydrophobic silicon dioxide, 2-5 parts of polypropylene fiber, 10-20 parts of fly ash, 15-25 parts of ceramic chip and 1-3 parts of dispersing agent.
6. The isolated reinforcement method based on the soft soil foundation according to claim 1, characterized in that: the isolation cladding (2) in the step S4 is formed in a segmented manner, and a plurality of isolation pieces distributed in an annular array are put into each segment, each isolation piece comprises a trigger ball (3) and guide fiber tubes (4) connected to the upper end and the lower end of the trigger ball (3), and the trigger ball (3) is communicated with the guide fiber tubes (4).
7. An isolated reinforcement method based on soft soil foundation according to claim 6, characterized in that: trigger ball (3) intussuseption is filled with water-soluble package (5), water-soluble package (5) adopt the water-soluble material to make, it has a plurality of evenly distributed's magnetic microcapsule (6) to inlay in water-soluble package (5), magnetic microcapsule (6) intussuseption is filled with nitre stone powder and magnetic.
8. An isolated reinforcement method based on soft soil foundation according to claim 6, characterized in that: guide fiber pipe (4) inlay pipe (41), a plurality of water accuse magnetic ball (42) and water guide fiber silk (43) including the cavity, the cavity inlays and sets up a plurality of evenly distributed's the hole of permeating water on pipe (41), and water accuse magnetic ball (42) inlay and connect in permeating water downthehole, water guide fiber silk (43) are connected with water accuse magnetic ball (42) and extend to in keeping apart covering (2).
9. An isolated reinforcement method based on soft soil foundation according to claim 8, characterized in that: the water control magnetic ball (42) comprises a magnetic hemisphere (421), a magnetism isolating hemisphere (422) and a plurality of puncture needles (423), the magnetic hemisphere (421) is symmetrically connected with the magnetism isolating hemisphere (422), the magnetism isolating hemisphere (422) is connected to the inner side of the magnetic hemisphere (421), the puncture needles (423) are uniformly embedded in the magnetism isolating hemisphere (422) and connected with the inner surface of the magnetic hemisphere (421), and the magnetism isolating hemisphere (422) is prepared by mixing iron-nickel alloy powder and an effervescent disintegrant according to the mass ratio of 1: 1.
10. The isolated reinforcement method based on the soft soil foundation according to claim 1, characterized in that: before the waterproof concrete is poured in the step S5, a plurality of maintenance sleeves distributed in an annular array mode are reserved around the precast pile (1), the lower ports of the maintenance sleeves are aligned to the isolation cladding (2), the upper ports of the maintenance sleeves are sealed, and the temperature sensors are installed inside the maintenance sleeves.
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| CN202011298117.4A CN112359810A (en) | 2020-11-19 | 2020-11-19 | Isolated reinforcement method based on soft soil foundation |
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| CN202011298117.4A CN112359810A (en) | 2020-11-19 | 2020-11-19 | Isolated reinforcement method based on soft soil foundation |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107558318A (en) * | 2017-09-04 | 2018-01-09 | 中建路桥集团有限公司 | The flabbiness ground strengthened processing method of new highway engineering |
| CN109024558A (en) * | 2018-07-21 | 2018-12-18 | 四川启创建设工程有限公司 | A kind of construction of prefabricated piles method improving bearing capacity and torsional property |
| CN111663388A (en) * | 2020-06-24 | 2020-09-15 | 金方玲 | Novel net-forming type tamping method for roadbed construction filler |
| CN111827570A (en) * | 2020-07-22 | 2020-10-27 | 周力启 | Fluff type anti-seepage concrete slab for building outer wall |
-
2020
- 2020-11-19 CN CN202011298117.4A patent/CN112359810A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107558318A (en) * | 2017-09-04 | 2018-01-09 | 中建路桥集团有限公司 | The flabbiness ground strengthened processing method of new highway engineering |
| CN109024558A (en) * | 2018-07-21 | 2018-12-18 | 四川启创建设工程有限公司 | A kind of construction of prefabricated piles method improving bearing capacity and torsional property |
| CN111663388A (en) * | 2020-06-24 | 2020-09-15 | 金方玲 | Novel net-forming type tamping method for roadbed construction filler |
| CN111827570A (en) * | 2020-07-22 | 2020-10-27 | 周力启 | Fluff type anti-seepage concrete slab for building outer wall |
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