CN218779466U - Soft foundation construction structure for high polymer grouting treatment - Google Patents
Soft foundation construction structure for high polymer grouting treatment Download PDFInfo
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- CN218779466U CN218779466U CN202223327367.3U CN202223327367U CN218779466U CN 218779466 U CN218779466 U CN 218779466U CN 202223327367 U CN202223327367 U CN 202223327367U CN 218779466 U CN218779466 U CN 218779466U
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Abstract
The application relates to a high polymer grouting soft foundation construction structure, which comprises the following steps of improving the shear strength and the bearing capacity of a soft foundation and reducing the compressibility and the water permeability of foundation soil by arranging a pile load, a high polymer high-pressure jet grouting pile and a high polymer tree root steel pipe pile; the water in the foundation is discharged by the aid of the stacking and loading matched drainage steel perforated pipes, the net-shaped water collecting pipelines and the water pumps, and liquefaction characteristics of a foundation soil body are eliminated or weakened; through setting up the high polymer rubble layer of solidifying, improve the cooperative work ability of high polymer high pressure jet grouting pile and stake interpile soil, guarantee to warp harmoniously, prevent the differential settlement. The grouting material adopts bi-component fast-setting and expansive high polymer material, has simple components and quick setting time, and can not cause the consequences of sewage cross flow and environmental pollution.
Description
Technical Field
The application relates to the technical field of foundation treatment, in particular to a soft foundation construction structure for high polymer grouting treatment.
Background
The foundation treatment is an engineering technical measure for improving the bearing capacity of the foundation for supporting a building or improving the deformation property or the permeability property of the foundation, and plays a significant role in ensuring the smooth development of subsequent engineering construction. Through foundation treatment, one or more of the following purposes need to be achieved:
1) The bearing capacity of the foundation soil is improved. The concrete expression form of the shear failure of the foundation is that the bearing capacity of the foundation of the building is insufficient, and the structure is unstable under the action of eccentric load or lateral soil pressure; the adjacent foundation is raised due to filling or building load; and (3) the pit bottom bulges when the side slope unstable foundation pit is excavated during earth excavation. Shear failure of foundation soil is mainly due to insufficient shear strength of the foundation soil, and therefore, in order to prevent shear failure, certain measures are required to improve the shear strength of the foundation soil.
2) Reducing the compressibility of the foundation soil. The compression of the foundation is shown in that the settlement of the building and the differential settlement are large, and the compression of the soil is related to the compression modulus of the soil. Therefore, measures must be taken to increase the compressive modulus of the foundation soil to reduce settlement and uneven settlement of the foundation.
3) Improve the water permeability of the foundation. In the excavation construction of a foundation pit, piping or flowing sand is generated due to the fact that thin-layer silt or silt is clamped in a soil layer, and the piping or the flowing sand are problems caused by movement of underground water in the soil, so that measures must be taken to enable the foundation soil to reduce water permeability or reduce hydrodynamic pressure.
4) Eliminating or weakening the liquefaction characteristic of the foundation soil body. The saturated soil body can be liquefied under the action of earthquake or power, so that large deformation is generated, and therefore, the water in the foundation needs to be removed in the foundation treatment, and the liquefaction characteristic of the foundation soil body is eliminated or weakened.
At present, no systematic foundation treatment method exists, and the problems can be comprehensively and efficiently solved.
For example, the construction method for disposing the soil landslide in the high polymer grouting emergency rescue manner proposed by the Chinese patent application No. CN202110446411.3 adopts a two-component high polymer high pressure grouting manner to treat the landslide, but because the high polymer high pressure grouting manner is not adopted, the slurry is sprayed out only through high pressure, the permeation and the flowing of the high pressure slurry are relatively random, the reinforcement effect is deficient, and only by adopting the high pressure rotary spraying manner, the slurry and the soil body can be more fully fused while the soil body is cut by the high pressure slurry and the drilling tool is continuously rotated, so that the columnar reinforcement body with a certain diameter can be more uniformly generated, the ratio of the slurry to the soil body can be adjusted, and the quality can be more easily controlled.
For example, the chinese patent application No. CN201810614498.9 discloses a drainage plate device and method with water-swelling materials inside under surcharge and preloading, but it only absorbs water to improve the shear strength and bearing capacity of the foundation soil, the reinforcing means is relatively insufficient, and water is always retained in the water-swelling materials and exists in the foundation, which is also a hidden danger.
The cement jet grouting pile is also a common foundation treatment means, but the setting time of conventional cement grout is long, the urgency of engineering is difficult to meet, more importantly, the cement energy consumption is high, the concept of 'green water green mountain' and the target requirement of 'double carbon' are violated, and the sewage cross flow is often generated in the cement jet grouting pile construction process, so that the environment is easily polluted.
Therefore, a construction structure for treating soft foundation by high polymer grouting is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
Content of application
The application aims to solve the problems in the prior art and provide a high polymer grouting soft foundation construction structure.
In order to achieve the purpose of the application, the following technical scheme is adopted in the application: a high polymer slip casting handles soft foundation construction structures includes:
the operation platform is arranged on the ground surface of the soft foundation and is used for construction operation;
the broken stone cushion layer is laid on the ground surface of the soft foundation and is used for forming a high polymer broken stone curing layer through high polymer grouting in the final stage of drainage and construction to be used as a pile cap of the high polymer high-pressure jet grouting pile;
the vacuum film is laid on the gravel cushion layer and is used for being matched with a vacuum pump to vacuumize for draining water;
the pile load is arranged on the broken stone cushion layer and the vacuum film and avoids the drainage steel perforated pipe and the high polymer high-pressure jet grouting pile position, and is used for providing vertical pressure;
the drainage steel perforated pipes are uniformly arranged on the soft foundation at intervals, the bottom of the drainage steel perforated pipes penetrates through the soft foundation layer, the top of the drainage steel perforated pipes exceeds the ground elevation by a certain height, and the arrangement area of the drainage steel perforated pipes is larger than the area of the soft foundation to be treated; the high polymer tree root steel pipe pile is formed by grouting after drainage and drainage are finished;
the high polymer high-pressure rotary jet grouting pile positions are uniformly arranged on the soft foundation at intervals and positioned between the drainage steel perforated pipes, the bottom of each high polymer high-pressure rotary jet grouting pile position penetrates through the soft foundation layer, and the arrangement area is larger than the area of the soft foundation to be treated; the grouting material is used for grouting to form a high polymer high-pressure jet grouting pile;
the water pump is used for pumping water to the drainage steel floral tube;
the vacuum pump is used for vacuumizing the soft foundation covered by the vacuum film;
the drainage main pipe is communicated with the top of each drainage steel perforated pipe and communicated with a water pump to pump water;
the sealing ring sleeve is used for sealing the drainage steel perforated pipe and the soft foundation;
and the temperature sensor is arranged in the soft foundation and used for detecting the temperature of the soft foundation.
Furthermore, the arrangement areas of the drainage steel perforated pipe and the high polymer high-pressure rotary jet pile are both larger than or equal to the area of the soft foundation to be treated.
Furthermore, the drainage steel perforated pipe and the high polymer high-pressure jet grouting pile are arranged in a square or quincunx shape.
And further, the high polymer high-pressure jet grouting pile is formed by constructing a high polymer high-pressure jet grouting drilling machine.
Further, the double-channel high-pressure grouting pipe of the high polymer high-pressure rotary jet drilling machine comprises a drill rod and two independent nozzles arranged in the drill rod, wherein each nozzle extends out of the side face of the drill rod.
Furthermore, the sealing ring sleeve is sleeved on the outer ring of the drainage steel perforated pipe, the protruding part of the bottom of the sealing ring sleeve is inserted into the soft foundation, and the downward plane part is tightly attached to the surface of the soft foundation.
Further, the top of the drainage steel perforated pipe exceeds the ground elevation by a certain height.
Compared with the prior art, the method has the following beneficial effects:
1. compared with the prior art (CN 201410837193.6), the method has the advantages that foundation prepressing is carried out firstly, then the pile is formed, the pile body can be effectively prevented from being crushed or penetrating into the foundation, in addition, the pile loading covering pressure can also improve the construction quality of the high polymer high-pressure jet grouting pile, and the soil body uplift and damage under the high-pressure grouting condition are prevented.
2. Compared with the prior art (CN 201410837193.6 needs special hole forming and sand filling, which is inconvenient, the diameter of a sand pile is generally at least 0.5-1 m, and the consumption of sand and stone is huge), the method adopts the high polymer high-pressure jet grouting pile, can fully utilize the original soil body of the soft foundation to form a reinforcement body, and does not need extra sand and stone filling.
3. Compared with the prior art (after the sand pile in CN201410837193.6 is cemented by high polymer, the permeability is greatly reduced, so that the effect of discharging pore water in the soil 2 among piles along a drainage channel formed by the sand pile and a broken stone cushion layer is possibly poor, and the foundation treatment effect is seriously influenced), the steel perforated pipe is arranged, and different effects can be generated along with the construction progress: the method is specially used for draining water, then the water is used as a high polymer high-pressure grouting pipe, and finally the tree root micro steel pipe high polymer sand pile can be formed and used for improving the bearing capacity of the foundation. The function of steel floral tube can both fully be played under various operating modes, can not cause idle and the waste of material, only increase appropriate material quantity, can realize multiple purposes, have twice with half the effort, effect that kill many birds with one stone.
4. The high polymer grouting material has the advantage of quick setting, can be solidified in 10 seconds at the fastest speed, greatly shortens the construction period, and effectively solves the problem that the initial setting time of conventional cement paste in the prior art is long.
5. The high polymer grouting material has good expansibility, and the formed high polymer high-pressure jet grouting pile body can only expand horizontally and violently due to the fact that the pile body is subjected to an overlying load, so that lateral pressure is applied to soil around the pile, the soil body is in a triaxial compression state due to the overlying load, the shear strength is increased, meanwhile, the water in the soil around the pile can be extruded into a steel perforated pipe more fully, and the water can be discharged smoothly.
6. The foundation heating method has the advantages that special equipment or working procedures are needed for heating the foundation in the past, a large amount of heat is released by fully utilizing the reaction of two-component high polymers (isocyanate and polyalcohol), the high polymer rotary jet grouting pile can be formed to serve as a reinforcing body, the soft foundation can be heated by the way, the evaporation of water in the soft foundation is promoted under the condition that the vacuum degree of the soft foundation reaches a certain degree, the solidification of the soft foundation is accelerated, and the purpose of killing two birds with one stone is achieved.
7. Except that the vacuum pump is used for improving soft base vacuum degree, this application still adopts the water pumper directly to extract air netted water collecting pipe and steel floral tube, can discharge the moisture in the soft base more directly, can not have vacuum pressure loss's problem.
8. The high polymer grouting material does not contain moisture, the strength of a soft foundation cannot be reduced at the initial stage of grouting, and the problem that the cement grout in the prior art contains a large amount of moisture and is easy to reduce the integral strength of the site which is weak in itself is effectively solved.
9. The random property of general high-pressure grouting is great, and the reinforcing scope and quality are all comparatively uncontrollable, therefore, except that this application carries out the random high-pressure grouting of high polymer through the hole of steel floral tube, generates high polymer root steel-pipe pile as supplementary reinforcement body, still generates high polymer high pressure jet grouting pile through the mode of high-pressure jet grouting, and the pile body quality is more controllable, and intensity and reinforcing scope are more even, and the reinforcing effect is better than the great high-pressure grouting of general randomness.
10. Based on the advantages, the method has the advantages of simple process, light equipment, easiness in operation, short construction period, good effect and the like, and is very suitable for working conditions with urgent construction period and higher environmental protection requirements.
Drawings
FIG. 1 is a schematic view of the construction configuration of the present application;
FIG. 2 is a schematic illustration of the present application during construction;
FIG. 3 is a schematic view of the installation of the sealing collar of the present application;
FIG. 4 is a flow chart of the construction method of the present application;
FIG. 5 is a schematic diagram of a dual-channel high-pressure grouting pipe.
In the figure, 1, a gravel cushion; 2. a vacuum film; 3. stacking; 4. a steel perforated pipe for drainage; 5. a soft foundation; 6. pile position of high polymer high-pressure jet grouting pile; 7. a water pump; 8. a vacuum pump; 9. a main drain pipe; 10. a temperature sensor; 11. solidifying layers of high polymer broken stones; 41. sealing the ring sleeve; 42. high polymer tree root steel pipe piles; 61. high polymer high pressure jet grouting pile; 62. a double-channel high-pressure grouting pipe; 621. drilling a rod; 622. a drill bit; 623. and (4) a nozzle.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above terms should not be construed as limiting the present application.
Example one
As shown in fig. 1-2, the present polymer grouting soft foundation construction structure is used for reinforcing a soft foundation 5, and includes:
the operation platform is arranged on the ground surface of the soft foundation 5 and used for construction operation;
the broken stone cushion layer 1 is laid on the ground surface of the soft foundation 5, is used for forming a high polymer broken stone curing layer 11 through high polymer grouting in the final stage of drainage and construction, and is used as a pile cap of the high polymer high-pressure jet grouting pile 61;
the vacuum membrane 2 is laid on the gravel cushion 1 and is used for being matched with the vacuum pump 8 to vacuumize for draining water;
the pile load 3 is arranged on the broken stone cushion layer 1 and the vacuum membrane 2 and avoids the drainage steel perforated pipe 4 and the high polymer high-pressure jet grouting pile position 6 and is used for providing vertical pressure;
the drainage steel perforated pipes 4 are uniformly arranged on the soft foundation 5 at intervals, the bottom of the drainage steel perforated pipes penetrates through the layer of the soft foundation 5, the top of the drainage steel perforated pipes exceeds the ground elevation by a certain height, and the arrangement area of the drainage steel perforated pipes is larger than the area of the soft foundation 5 to be treated; grouting to form a high polymer tree root steel pipe pile 42 after the drainage and the drainage are finished;
high polymer high-pressure rotary spraying pile positions 6 are uniformly arranged on the soft foundation 5 at intervals and positioned between the drainage steel perforated pipes 4, the bottom of the high polymer high-pressure rotary spraying pile positions 6 penetrates through 5 layers of the soft foundation, and the arrangement area is larger than the area of the soft foundation 5 to be treated; used for forming a high polymer high-pressure jet grouting pile 61 by grouting;
the water pump 7 is used for pumping water to the water discharge steel perforated pipe 4;
the vacuum pump 8 is used for vacuumizing the soft foundation 5 covered by the vacuum film 2;
the main drainage pipe 9 is communicated with the top of each steel perforated drainage pipe 4 and communicated with the water pump 7 for pumping water;
the sealing ring sleeve 41 is used for sealing the drainage steel perforated pipe 4 and the soft foundation 5;
and the temperature sensor 10 is arranged in the soft foundation 5 and used for detecting the temperature of the soft foundation 5.
Example two
Based on the first embodiment, as shown in fig. 4, the construction structure of the soft foundation by grouting high polymer comprises the following steps:
s00, cleaning the surface of the soft foundation 5, and sorting out the operation platform;
s10, vertically arranging a drainage steel perforated pipe 4 on the operation platform according to a designed array and penetrating through a soft foundation 5 layer to be treated;
in the embodiment, the drainage steel perforated pipe 4 is vertically arranged on the operation platform, the length of the drainage steel perforated pipe penetrates through 5 layers of the soft foundation to be treated, the drainage steel perforated pipe is arranged in a square or quincunx shape, the top of the drainage steel perforated pipe 4 needs to exceed the ground elevation by a certain height, a reticular water collecting pipeline (a drainage header pipe 9) and a water pump 7 are conveniently connected, the arrangement area needs to be larger than the area of the soft foundation 5 to be treated, so that redundant water in the soft foundation 5 can be fully discharged, and the liquefaction characteristic is eliminated; the soft foundation 5 has lower soil body strength, and is convenient for the construction of the drainage steel perforated pipe 4.
S20, sealing the drainage steel perforated pipe 4 and the drilled hole through a sealing ring sleeve 41, and pressing the sealing ring sleeve 41 into the soft foundation 5;
in this embodiment, as shown in fig. 3, a rubber ring (sealing ring 41) is inserted into the steel pipe 4 (the bottom of the sealing ring 41 is protruded into the soft foundation 5, and the downward plane part is tightly attached to the surface of the soft foundation 5), and is pressed into the soft foundation 5 to fit the surface of the soft foundation 5, so as to make the air-tight between the steel pipe 4 and the drilled hole as possible.
S30, paving a drainage gravel cushion layer 1 on the ground surface, and paving a vacuum film 2 on the gravel cushion layer 1;
in the embodiment, a drainage gravel cushion layer 1 is paved on the ground surface, and water seeped from the ground surface of the soft foundation 5 can be drained in the horizontal direction through the gravel cushion layer 1; and laying a vacuum film 2 on the gravel cushion layer 1 for vacuumizing, solidifying soft soil and discharging water in the soft foundation 5.
S40, carrying out pile loading 3 on the gravel cushion layer 1, and avoiding the drainage steel perforated pipe 4 and reserved pile positions of the high polymer high-pressure jet grouting pile 61 in the subsequent steps;
in the embodiment, the gravel cushion layer 1 is loaded with the load 3, the load is determined according to the design load, the soil quality and the required foundation bearing capacity, meanwhile, the pile position of the drainage steel perforated pipe 4 and the high polymer high-pressure jet grouting pile 61 needs to be avoided by the load 3, and the reserved gap is preferably slightly larger than the drilling hole diameter of the jet grouting pile; at this time, the foundation gradually begins to be consolidated and settled under the action of the stacking load 3.
S50, communicating and converging all the drainage steel perforated pipes 4 into a drainage main pipe 9 through a net-shaped water supply pipeline, wherein the drainage main pipe 9 is connected with a water pump 7;
in this embodiment, the top ends of the discharge steel perforated pipes 4 are communicated with each other by a net-shaped water supply pipe, and finally combined into one pipe, which is connected to a water pump 7.
S60, arranging the pile positions of the high polymer high-pressure jet grouting piles 61 among the drainage steel perforated pipes 4 according to a designed matrix, and enabling the pile body length of the high polymer high-pressure jet grouting piles 61 to penetrate through the 5 layers of the soft foundation to be treated;
in this embodiment, the pile position of the high polymer high pressure jet grouting pile 61 is arranged between the drainage steel perforated pipes 4, the pile body length penetrates through the layer of the soft foundation 5 to be treated, the pile body is arranged in a square or quincunx shape, and the arrangement area is not less than the area of the soft foundation 5 to be treated, so as to sufficiently reinforce the soft foundation 5.
S70, drilling and grouting operation of a high polymer high-pressure jet grouting pile 61 is carried out on the soft foundation 5 through a double-channel high-pressure grouting pipe 62 by using a high polymer high-pressure jet grouting drilling machine, so that two-component grouting materials are in contact reaction with each other and cut surrounding soil bodies, the two-component grouting materials are mixed with the soil bodies to form the high polymer high-pressure jet grouting pile 61, the grouting operation is stopped when the elevation of the bottom of the double-channel high-pressure grouting pipe 62 reaches the elevation of the ground surface, and the construction of the high polymer high-pressure jet grouting pile 61 is completed;
in this embodiment, the two-component grouting materials are respectively polyol and isocyanate, and the reaction between the isocyanate and the polyol is a violent exothermic reaction; the drilling tool of the high-pressure rotary jet drilling machine comprises a drill bit 622, a drill stem 621, a double-channel high-pressure grouting pipe 62 in the drill stem 621 and a nozzle 623, the drilling tool rotates at a high speed and drills downwards (at the moment, grouting is not performed temporarily), after the drilling tool reaches the designed depth, the drilling tool is lifted at a set speed and keeps rotating, meanwhile, the double-channel high-pressure grouting pipe 62 respectively ejects polyol and isocyanate slurry at a high speed to cut the surrounding soil body, the polyol and the isocyanate are mixed to quickly react, expand and solidify, a large amount of heat is emitted, the high polymer high-pressure rotary jet drilling tool is mixed with the soil body to form a high polymer high-pressure rotary jet drilling pile body 61 with high strength, and meanwhile, the high polymer rotary jet drilling pile body can only horizontally and violently expand due to overlying load, so that lateral pressure is applied to the surrounding soil of the pile, the overlying load is added, the soil body is in a triaxial compression state, the shear strength is increased, and the water in the surrounding soil of the pile is favorably extruded.
The double-channel high-pressure grouting pipe 62 is lifted according to a set speed, grouting is carried out continuously, the soft foundation 5 soil body cut by the high-speed grout can be better combined with the high polymer grout, and the reinforcing effect is better; due to the existence of the pile load 3, the formed expansive high polymer high-pressure jet grouting pile 61 cannot expand axially and can expand laterally only, so that the compactness and the strength of the pile body are improved, and on the other hand, because the pile body can expand laterally only, moisture of soil around the pile can be more fully extruded into the steel perforated pipe and then smoothly discharged.
S80, heating the foundation through mutual contact reaction of the two-component grouting materials, and vacuumizing the foundation through a vacuum pump 8 to keep the temperature and the absolute pressure of the foundation within a preset interval so as to promote liquid water in the foundation to be converted into gas;
in this embodiment, the heating temperature of the foundation (detected by the temperature sensor 10) and the absolute pressure of the foundation are matched according to the following table 1, that is, when the heating temperature of the foundation is 50 ℃, the absolute pressure of the foundation needs to be less than 12.34kPa, and then the water is converted from the liquid state to the gas state; when the heating temperature of the foundation is 55 ℃, the absolute pressure of the foundation is required to be less than 15.743kPa, and then the water is converted from the liquid state to the gas state; when the heating temperature of the foundation is 60 ℃, the absolute pressure of the foundation is required to be less than 19.923kPa, and then the water is converted from the liquid state to the gas state; when the heating temperature of the foundation is 65 ℃, the absolute pressure of the foundation needs to be less than 25.014kPa, and then the water is converted from a liquid state to a gas state; when the heating temperature of the foundation is 70 ℃, the absolute pressure of the foundation needs to be less than 31.164kPa, and then the water is converted from the liquid state to the gas state. According to the current construction experience, the vacuum degree under the film of vacuum preloading can be maintained at about 85-95 kPa, so the absolute pressure of the foundation can be as low as 5-15 kPa (calculated by taking the atmospheric pressure as 100 kPa), namely the heating temperature of the foundation needs about 55 ℃ at most to promote the liquid water in the foundation to be converted into gas, and the moisture discharge and consolidation of the foundation are accelerated.
TABLE 1
| Temperature (. Degree.C.) | 50 | 55 | 60 | 65 | 70 |
| Absolute pressure (kPa) | 12.34 | 15.743 | 19.923 | 25.014 | 31.164 |
S90, pumping the drainage steel perforated pipe 4, and matching with vertical extrusion of the stacking load 3 and lateral extrusion of the high polymer high-pressure jet grouting pile 61 on the surrounding soil body, further promoting water in the soft foundation 5 to seep out of the drainage steel perforated pipe 4, and improving the consolidation degree and the bearing capacity of the soft foundation 5;
in the embodiment, the drainage steel floral tube 4 is evacuated to improve the vacuum degree in the tube, and the vertical extrusion generated by the stacking load 3 and the lateral extrusion of the expandable high polymer high-pressure jet grouting pile 61 on the surrounding soil body are added, so that the water in the deep part of the soft foundation 5 is fully leaked out of the drainage steel floral tube 4, the consolidation degree and the bearing capacity of the soil body of the soft foundation 5 are further improved, and the liquefaction characteristic is eliminated.
S100, after the soft foundation 5 is subjected to drainage consolidation, performing high polymer high-pressure grouting in a drainage steel perforated pipe 4 serving as a grouting pipe, so that slurry permeates into a surrounding soil body through holes of the drainage steel perforated pipe 4 to form a tree-root-shaped high polymer tree root steel pipe pile 42;
in this embodiment, after the drainage consolidation of the soft foundation 5 is completed, the drainage steel floral tube 4 is used as a grouting tube, and high polymer high-pressure grouting is performed in the tube, so that grout permeates into the surrounding soil body through the holes of the drainage steel floral tube 4 to form a tree-root-shaped high polymer reinforcing body, and finally a high polymer tree-root steel tube pile 42 is formed, and cooperates with the tree-root-shaped high polymer reinforcing body to further improve the bearing capacity of the foundation; meanwhile, the high polymer reacts to release a large amount of heat to reinforce the foundation again, so that liquid water in the foundation is promoted to be converted into gas, and the moisture discharge and consolidation of the foundation are accelerated.
S110, cutting the overhigh drainage steel perforated pipe 4, performing high polymer grouting on the gravel cushion layer 1 to form a high polymer gravel solidified layer 11, and taking the high polymer gravel solidified layer 11 as a pile cap of a high polymer high-pressure jet grouting pile 61;
in this embodiment, cut off too high drainage steel floral tube 4, carry out the high polymer slip casting to rubble bed course 1, will be loose rubble gluing originally together, form the high polymer rubble solidified layer 11 that has certain intensity and pliability, can directly regard as the pile cap of high polymer high pressure jet grouting pile 61, improve the cooperative work ability of high polymer high pressure jet grouting pile 61 and stake intervallic soil, guarantee to warp harmoniously, prevent inhomogeneous settlement.
And S120, dismantling construction equipment, and cleaning the site to finish construction.
The details of the present application are not prior art and are not described in detail herein.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Although the terms of gravel cushion 1, vacuum membrane 2, ballast 3, drainage steel perforated pipe 4, soft foundation 5, high polymer high-pressure jet grouting pile position 6, water pump 7, vacuum pump 8, drainage main pipe 9, temperature sensor 10, high polymer gravel cured layer 11, sealing ring sleeve 41, high polymer tree root steel pipe pile 42, high polymer high-pressure jet grouting pile 61, double-channel high-pressure grouting pipe 62, drill pipe 621, drill bit 622, nozzle 623 and the like are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present application; they are to be construed as being without limitation in any way whatsoever, the spirit of the present application.
The present application is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present application, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present application, fall within the protection scope of the present application.
Claims (7)
1. The utility model provides a soft base construction structures of polymer slip casting processing for carry out reinforcement treatment to soft base, its characterized in that includes:
the operation platform is arranged on the ground surface of the soft foundation and is used for construction operation;
the gravel cushion layer is laid on the ground surface of the soft foundation and is used for forming a high polymer gravel solidified layer through high polymer grouting in the final stage of drainage and construction and is used as a pile cap of the high polymer high-pressure jet grouting pile;
the vacuum film is laid on the gravel cushion layer and is used for being matched with a vacuum pump to vacuumize for draining water;
the pile load is arranged on the broken stone cushion layer and the vacuum film and avoids the drainage steel perforated pipe and the high polymer high-pressure jet grouting pile position, and is used for providing vertical pressure;
the drainage steel perforated pipes are uniformly arranged on the soft foundation at intervals, the bottom of the drainage steel perforated pipes penetrates through the soft foundation layer, the top of the drainage steel perforated pipes exceeds the ground elevation by a certain height, and the arrangement area of the drainage steel perforated pipes is larger than the area of the soft foundation to be treated; the high polymer tree root steel pipe pile is formed by grouting after drainage and drainage are finished;
the high polymer high-pressure rotary jet grouting pile positions are uniformly arranged on the soft foundation at intervals and positioned between the drainage steel perforated pipes, the bottom of each high polymer high-pressure rotary jet grouting pile position penetrates through the soft foundation layer, and the arrangement area is larger than the area of the soft foundation to be treated; the grouting material is used for grouting to form a high polymer high-pressure jet grouting pile;
the water pump is used for pumping water to the water discharge steel perforated pipe;
the vacuum pump is used for vacuumizing the soft foundation covered by the vacuum film;
the drainage main pipe is communicated with the top of each drainage steel perforated pipe and communicated with the water pump to pump water;
the sealing ring sleeve is used for sealing the drainage steel perforated pipe and the soft foundation;
and the temperature sensor is arranged in the soft foundation and used for detecting the temperature of the soft foundation.
2. The construction structure of the high polymer grouting treatment soft foundation according to claim 1, wherein the arrangement area of the drainage steel perforated pipe and the high polymer high-pressure rotary jet pile is larger than or equal to the area of the soft foundation to be treated.
3. The polymer grouting treatment soft foundation construction structure as claimed in claim 1, wherein the drainage steel perforated pipe and the polymer high pressure jet grouting pile are arranged in a square or quincunx shape.
4. The soft foundation construction structure for polymer grouting treatment according to claim 1, wherein the polymer high-pressure jet grouting pile is constructed by a polymer high-pressure jet grouting drilling machine.
5. The polymer grouting soft foundation construction structure according to claim 4, wherein the double-channel high-pressure grouting pipe of the polymer high-pressure rotary jet drilling machine comprises a drill pipe and two independent nozzles arranged in the drill pipe, and each nozzle extends out of the side surface of the drill pipe.
6. The structure of claim 1, wherein said sealing ring is sleeved on the outer ring of said steel discharge perforated pipe, the bottom projection of said sealing ring is inserted into the soft foundation, and the downward facing flat surface of said sealing ring is tightly attached to the surface of the soft foundation.
7. The polymer grouting treatment soft foundation construction structure as claimed in claim 1, wherein the top of the drainage steel perforated pipe exceeds the ground elevation by a certain height.
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| CN202223327367.3U CN218779466U (en) | 2022-12-13 | 2022-12-13 | Soft foundation construction structure for high polymer grouting treatment |
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| CN202223327367.3U Active CN218779466U (en) | 2022-12-13 | 2022-12-13 | Soft foundation construction structure for high polymer grouting treatment |
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