Soft soil solidification capsule containing recycled concrete particles

Abstract

The utility model discloses a soft soil solidification capsule containing recycled concrete particles, which comprises an outer membrane shell and inner core aggregate arranged in the outer membrane shell and made of recycled concrete, and sodium silicate powder is densely filled in an annular cavity formed between the outer membrane shell and the inner core aggregate. And the outer membrane shell is a soft membrane made of polyacrylamide and completely covers the internal sodium silicate and the recycled concrete aggregate. When in use, the device is uniformly scattered into solidified soil, and the compacted outer film is crushed or is dissolved after being watered and maintained during construction. And the water glass powder, water and soil particles are subjected to physicochemical reaction to complete soil body modification and solidification, and construction is efficient and rapid. And after the maintenance is finished, the inner core aggregate and the soil particles form a new structure with relatively high bearing capacity. The polyacrylamide adopted by the utility model can be biodegraded, and the recycled concrete aggregate is the reutilization of waste concrete in construction waste. Therefore, the purposes of improving the permeability of the soil body while improving the strength of the soil body are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation treatment, and in particular relates to a soft soil solidification capsule containing recycled concrete particles. Background Art

[0002] At present, there are two more important problems in foundation soil solidification technology. One is the traditional foundation soil solidification technology, which usually adds curing agents such as cement, gypsum and mortar to the soil to promote the bonding between soil particles, thereby improving the mechanical properties of the soil. However, the traditional foundation soil solidification technology has problems such as a large amount of carbon emissions in the production of curing agents, pollution to the environment during use, and difficulty in controlling the uniformity of solidification. Another way is biocementation technology such as microbial induced calcium carbonate precipitation (MICP) technology and enzyme induced calcium carbonate precipitation (EICP) technology. However, the survival conditions of biological enzymes in biocementation technology are relatively harsh, and they are easily inactivated at room temperature. In addition, the cost of biocementation technology is expensive, which leads to an increase in project costs.

[0003] Especially in soft soil areas and some special geological conditions, the soil moisture content is high and the bearing capacity is low. The traditional method has low solidification uniformity and the cost of biocementation technology is high, making it difficult to solidify efficiently, making it difficult to ensure the economic viability of the project.

[0004] Therefore, it is urgent to develop a new type of soft soil solidification capsule to solve the problems existing in traditional solidification methods and biocementation technology, so as to improve the quality, efficiency and economy of soil solidification engineering and promote the sustainable development of infrastructure construction. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the utility model provides a curing capsule containing recycled concrete aggregate suitable for soft soil, which has the advantages of simple structure, fast curing, strong curing effect and green environmental protection. The curing capsule has a stable and reasonable structure, and the action time can be adjusted by adjusting the thickness of the outer film and the content of the filling curing agent, thereby greatly improving the curing reaction time and the curing strength.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solution: a soft soil solidification capsule containing recycled concrete particles includes an outer membrane shell made of polyacrylamide and an inner core aggregate made of recycled concrete arranged inside the outer membrane shell, and the annular cavity formed between the outer membrane shell and the inner core aggregate is densely filled with sodium silicate powder.

[0007] The outer membrane shell is spherical in shape, the thickness of the outer membrane shell is 30-100μm, and the outer diameter of the outer membrane shell is 12-15mm.

[0008] The core aggregate is in irregular particle shape with a particle size of 4.75-9.5 mm.

[0009] The inner core aggregate is arranged at the center of the outer membrane shell.

[0010] By adopting the above technical scheme, the outer membrane shell, sodium silicate powder and inner core aggregate required by the utility model are all produced at normal temperature and pressure, and the inner core aggregate is made by recycling the waste concrete with no obvious pores and high density.

[0011] The working principle of the utility model is as follows: during the construction process, according to the test data, the curing capsules are evenly sprinkled into the soil and then dynamically compacted. As the construction process progresses, the outer membrane shell (polyacrylamide film) is damaged or dissolved after watering and curing, and the water seeping into the ground reacts with the polyacrylamide film to cement the soil. The outer membrane is crushed, and the water glass powder reacts with water and soil particles to complete the soil modification and curing, and the construction is efficient and fast. In addition, the bearing capacity of the foundation is improved, the deformation of the foundation soil is suppressed, and the uneven settlement of the foundation is effectively controlled. The inner core aggregate (recycled concrete) and the soil particles form a new skeleton structure, which further improves the bearing capacity of the foundation, and improves the foundation permeability due to its drainage effect. The technology of making a film (outer membrane shell) of polyacrylamide is a mature technical means, and the outer membrane shell made has the characteristics of water solubility and corrosion resistance, so the outer membrane shell of the utility model adopts a single polyacrylamide material.

[0012] The solidifying capsules prepared by the utility model are easier to transport and effectively reduce engineering losses. During the compaction process during construction, the outer membrane is crushed or dissolved after watering and curing. The water glass powder reacts physically and chemically with water and soil particles to complete soil modification and solidification, and the construction is efficient and fast. This improves the bearing capacity of the foundation, inhibits deformation of the foundation soil, and effectively controls uneven settlement of the foundation.

[0013] The manufacturing process of the utility model is as follows: since the core aggregate and the sodium silicate powder do not react, the center of the core aggregate is fixed to the spherical cavity of the mold, and then the sodium silicate powder is filled in the spherical cavity and statically compacted, and after demoulding, the solidified capsule is wrapped to the outer circle of the compacted sodium silicate powder sphere.

[0014] In existing curing technologies such as bio-induced curing, the bio-source fluid is more likely to lose its activity at room temperature and pressure, which leads to reduced curing efficiency. Cement gypsum curing comes into contact with air too early, thus taking effect too early and ultimately making the curing degree of the foundation uneven.

[0015] The utility model adopts the outer coating technology to delay the premature solidification after the capsule is sprinkled into the soil, and the outer film is damaged after compaction or dissolved after reacting with water during curing. The sodium silicate powder filled inside reacts physically and chemically with the water and soil particles during curing, thereby improving the curing strength and completing a more uniform curing.

[0016] In summary, the utility model has the following technical effects:

[0017] 1) The utility model can significantly improve the bearing capacity of soil.

[0018] 2) Polyacrylamide film isolates the internal water glass powder and recycled concrete aggregate from the natural environment, effectively controlling the loss during storage, transportation and construction, thereby reducing project costs.

[0019] The core aggregate is recycled concrete aggregate, which is made from waste concrete recycled from construction waste. The outer membrane is crushed or dissolved by water, and the water glass powder contained in it reacts physically and chemically with water and soil particles. The recycled concrete aggregate and soil particles form a new structure, which further improves the bearing capacity. At the same time, due to the drainage effect of the concrete aggregate, the soil permeability is improved to a certain extent.

[0020] During the compaction process of construction, the outer membrane is crushed or dissolved after watering and curing. The physical and chemical reaction between water glass powder, water and soil particles can complete the soil modification and solidification, and the construction is efficient and fast.

[0021] The film made of polyacrylamide is non-toxic, harmless and pollution-free, and the recycled concrete aggregate is made by secondary utilization.

[0022] The prepared solidification capsules are evenly sprinkled into the foundation soil during the construction process. Under the action of dynamic compaction and watering maintenance, the outer membrane is damaged or dissolved. The internal water glass powder, water, carbon dioxide and particles in the soil react chemically to form a gel, thereby improving the strength and stability of the soil. The recycled concrete particles in the inner core form a new structure with the soil particles, and the recycled concrete particles have a drainage effect, which can ultimately improve the permeability of the soil. The utility model can realize an efficient, fast and low-cost soft soil solidification method, and the application of the utility model can significantly improve the bearing capacity and permeability of the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0024] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0025] like Figure 1 As shown, the soft soil solidification capsule containing recycled concrete particles of the utility model includes an outer membrane shell 1 made of polyacrylamide and an inner core aggregate 2 made of recycled concrete arranged inside the outer membrane shell 1, and the annular cavity formed between the outer membrane shell 1 and the inner core aggregate 2 is densely filled with sodium silicate powder 3.

[0026] The outer membrane shell 1 is spherical in shape, has a thickness of 30-100 μm, and an outer diameter of 12-15 mm. The outer membrane shell 1 can also be elliptical or other shapes.

[0027] The inner core aggregate 2 has an irregular particle shape with a particle size of 4.75-9.5 mm.

[0028] The inner core aggregate 2 is arranged at the center of the outer membrane shell 1 .

[0029] When the utility model is used, the prepared curing capsule is sprinkled into the on-site soil for dynamic compaction and watering maintenance according to the needs of the project. The outer membrane shell 1 begins to react with the water in the soil or the water added during the construction process to dissolve or break. The outer membrane shell 1 is 30-100 μm and can react with water to dissolve or break quickly, and the polyacrylamide itself has a certain cementing effect, which cements the nearby soil. After compaction and watering maintenance, the internal curing agent (sodium silicate powder 3) reacts physically and chemically with water and soil particles to achieve the purpose of curing the soil. After the internal curing agent (sodium silicate powder 3) completes the reaction, the bearing capacity of the soil is significantly improved, and the core recycled concrete aggregate is exposed. The core aggregate 2 forms a new result with the soil particles and the curing agent (sodium silicate) that completes the physical and chemical reaction, which significantly improves the bearing capacity of the foundation while ensuring a certain permeability.

[0030] The above embodiments illustrate the basic principles and features of the utility model, but the above only illustrates the preferred embodiments of the utility model and is not limited by the embodiments. Under the inspiration of this patent, ordinary technicians in this field can also make many forms of deformation and improvement without departing from the scope of protection of the utility model and the claims, which are all within the protection scope of the utility model. Therefore, the patent and protection scope of the utility model shall be subject to the attached claims.

Claims

1. Soft soil curing capsule containing recycled concrete particles, characterized by: The invention comprises an outer membrane shell made of polyacrylamide and an inner core aggregate made of recycled concrete arranged inside the outer membrane shell. The annular cavity formed between the outer membrane shell and the inner core aggregate is densely filled with sodium silicate powder.

2. The soft soil solidification capsule containing recycled concrete particles according to claim 1, characterized in that: The outer membrane shell is spherical in shape, the thickness of the outer membrane shell is 30-100μm, and the outer diameter of the outer membrane shell is 12-15mm.

3. The soft soil solidification capsule containing recycled concrete particles according to claim 1 or 2, characterized in that: The core aggregate is in irregular particle shape with a particle size of 4.75-9.5 mm.

4. The soft soil solidification capsule containing recycled concrete particles according to claim 1 or 2, characterized in that: The inner core aggregate is arranged at the center of the outer membrane shell.

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