Mountainous area half-filling and half-digging roadbed construction method for flow state solidified soil pouring construction

Abstract

The invention relates to the technical field of roadbed construction, and discloses a construction method of a semi-filled and semi-excavated roadbed in a mountainous area for flow-state solidified soil pouring construction, which comprises the following construction methods: 1) forming an excavation area at the upper part of a side slope, and forming a filling area at the lower part of the side slope; a plurality of steps are formed on the filling area; (2) supporting rods which are arranged in a longitudinal strip shape are driven into all the steps; (3) a template is erected on the step, a pouring area is defined between the template and the step, and flow-state solidified soil is poured into the pouring area to form a solidified soil layer; the flow-state solidified soil is formed by stirring and mixing an excavated soil body, a curing agent and a water body, and the curing agent comprises superfine slag powder, fly ash, waste gypsum, water glass, stone powder slag and furnace slag; (4) the construction step (3) is repeated, solidified soil layers are formed on all the steps respectively, the multiple solidified soil layers form a filling soil layer, and planting areas are formed in all the solidified soil layers; (5) the filling soil layer is maintained; 6, plants are planted in the planting area.

Description

Technical Field

[0001] This invention patent relates to the technical field of subgrade construction. Specifically, it relates to a construction method for a mountainous semi-fill and semi-excavated subgrade with fluidized solidified soil pouring construction. Background Art

[0002] When constructing mountain roads, due to the slope of the slope body, the subgrade is usually built in a semi-fill and semi-excavated manner on the slope. That is to say, an excavation area is formed by excavating the upper part of the slope, and an excavation is carried out on the lower part of the slope to form a filling area. Backfilling is carried out on the filling area to form a filling soil layer. In this way, the semi-fill and semi-excavation process jointly forms a flat subgrade.

[0003] In order to ensure that the filling soil layer does not slide down along the slope, generally, serrated steps are arranged on the filling area, and when backfilling the filling soil layer, an interface layer is formed between the filling soil layer and the steps.

[0004] In actual construction, the filling soil layer is backfilled by layered compaction. It is difficult for the filling soil layer to reach the degree of the original rock weathered soil in terms of density and strength. In the case of rainwater infiltration, on the one hand, the filling soil layer is extremely easy to be infiltrated, softened and saturated. On the other hand, the pore water in the filling soil layer seeps downward to the interface layer. At the same time, the rainfall infiltration in other areas also seeps to the interface layer and then seeps along the interface layer to the outside of the filling soil layer, resulting in the unstable structure of the filling soil layer and being extremely prone to geological disasters such as landslides and collapses. Summary of the Invention

[0005] The purpose of the present invention is to provide a construction method for a mountainous semi-fill and semi-excavated subgrade with fluidized solidified soil pouring construction, aiming to solve the problem of the unstable structure of the filling soil layer in the prior art.

[0006] The present invention is realized as follows. The construction method for a mountainous semi-fill and semi-excavated subgrade with fluidized solidified soil pouring construction includes the following construction methods:

[0007] 1). Excavate the original soil body of the slope. An excavation area is formed in the upper part of the slope, an inner subgrade section is formed at the bottom of the excavation area, and a filling area is formed in the lower part of the slope; multiple steps are formed on the filling area. Along the direction from top to bottom of the slope, the multiple steps are sequentially butted, and the adjacent steps are inclined and misaligned.

[0008] 2). Drive support rods arranged in a longitudinal strip shape on each of the steps. The lower part of the support rod is inserted into the original soil body of the slope to form a fixed section, and the upper part of the support rod extends above the step to form a support section.

[0009] 3), Support a formwork on the steps. A casting area is formed by enclosing between the formwork and the steps. Pour flowing solidified soil in the casting area, and the flowing solidified soil solidifies to form a solidified soil layer. The flowing solidified soil is formed by stirring and mixing excavated soil, a solidifying agent, and water. The solidifying agent includes slag powder, fly ash, waste gypsum, water glass, stone powder residue, and slag.

[0010] 4), Repeat the construction step 3). Along the upward direction of the filled area, solidified soil layers are respectively formed on each of the steps. A plurality of the solidified soil layers are stacked in sequence from bottom to top to form an integrated filled soil layer. A planting area that is open upward is formed on the outer side of each of the solidified soil layers.

[0011] An outer subgrade section is formed at the top of the filled soil layer. The inner subgrade section and the outer subgrade section are arranged flush and connected to form a subgrade.

[0012] 5), Cure the filled soil layer.

[0013] 6), Plant plants in the planting area.

[0014] Further, in the construction step 1), first clean the slope surface, and excavate the loose soil on the slope until the bottoms of the excavation area and the filled area are excavated to the original weathered soil.

[0015] Further, in the construction step 2), the support rod is made of steel material, and the length of the fixed section is between 20% and 50% of the length of the support rod.

[0016] Further, in the construction step 2), drill a fixing hole downward on the step. After the fixed section is inserted into the fixing hole, inject a slurry into the fixing hole to fix the fixed section and the slope body into one body.

[0017] Further, in the construction step 3), the preparation steps of the flowing solidified soil are as follows:

[0018] 3.1), Screen the excavated soil to form a screened soil.

[0019] 3.2), Stir and mix the screened soil and water in a mixing drum until it becomes a flowing state to form a soil slurry.

[0020] 3.3), Stir and mix the solidifying agent and water to form a solidifying slurry.

[0021] 3.4), Add the solidifying slurry into the mixing drum and stir and mix it with the soil slurry to form the flowing solidified soil.

[0022] Further, in the preparation step 3.4), there is a stirring shaft in the mixing drum. During the process of adding the solidifying slurry into the mixing drum at a set rate, the stirring shaft continuously stirs and mixes the soil slurry synchronously. After all the solidifying slurry is added into the mixing drum, the stirring shaft continuously stirs and mixes the solidifying slurry and the soil slurry for a set time so that the solidifying slurry and the soil slurry are stirred and mixed to form a fluidized solidified soil.

[0023] Further, in the construction step 3), a waterproof cloth is covered on the inner side wall of the formwork. The waterproof cloth is closed and surrounds the outer periphery of the pouring area. During the process of pouring the fluidized solidified soil into the pouring area, the waterproof cloth restricts the leakage of the fluidized solidified soil from the outer periphery of the pouring area.

[0024] Further, in the construction step 4), the outer side of the solidified soil layer is recessed downward to form the recessed planting area, and the planting area is filled with planting soil. In the construction step 6), the roots of the plants are planted in the planting soil.

[0025] Further, in the construction step 4), a wire mesh cylinder is provided in the planting area. The wire mesh cylinder includes an outer ring mesh layer arranged in a ring shape and an inner ring mesh layer arranged in a ring shape. There is an annular outer ring area between the outer ring mesh layer and the inner ring mesh layer, and the inner ring mesh layer encloses to form a central area.

[0026] The bottom of the outer ring mesh layer and the bottom of the inner ring mesh layer are connected as a whole through an annular bottom mesh layer. The top of the outer ring mesh layer and the top of the inner ring mesh layer are connected as a whole through an annular top mesh layer. The outer ring mesh layer is embedded in the solidified soil layer and combined with the solidified soil layer as a whole.

[0027] The planting soil fills the outer ring area and the central area and covers the wire mesh cylinder. In the construction step 6), the roots of the plants are placed in the central area, and the roots of the plants extend into the outer ring area.

[0028] Further, in the construction step 4), the support section is covered in the solidified soil layer. The cross section of the support section is square. A plurality of inclined pipes are provided on the outer periphery of the support section. A groove recessed inward is formed on the outer periphery of the support section. The inner end of the support section is fixedly docked on the outer periphery of the groove, and the outer end of the support section extends freely outward.

[0029] There is a through hole inside and outside in the inclined pipe. The upper part of the inclined pipe has an upper through hole. The top of the through hole is communicated with the outside through the upper through hole. The lower part of the inclined pipe has a lower through hole. The bottom of the through hole is communicated with the outside through the lower through hole.

[0030] After the support section is covered by the fluid-solidified soil pouring, the fluid-solidified soil fills the pipe holes and grooves, and the support section and the multiple inclined pipes form an integral body with the solidified soil layer.

[0031] Compared with the prior art, the construction method of the mountainous half-filled and half-excavated subgrade by pouring fluid-solidified soil provided by the present invention has the following technical effects:

[0032] 1). The fluid-solidified soil is used to pour and fill in the filling area to form a filling layer soil layer, and there is no need to roll and form the granular materials, which greatly saves the construction cost and improves the construction efficiency;

[0033] 2). The filling soil layer formed by the solidification of the fluid-solidified soil has better strength, stiffness, impermeability and durability, and the filling soil layer is an integral structure. Even under the scouring of rainwater, it is not easy to collapse or slump;

[0034] 3). There is a pouring interface between the bottom of the filling soil layer and the slope body. The fluid-solidified soil reacts chemically with the original soil of the slope body to generate ettringite and hydrated gel substances. The pouring interface has higher strength, stiffness, impermeability and durability, and moreover, the pouring interface will not become a channel for groundwater seepage, avoiding the risk of the filling soil layer sliding along the pouring interface;

[0035] 4). The support rods are inserted into the original soil body to play a shear resistance or anti-sliding role, preventing the risk of the filling soil layer sliding down;

[0036] 5). There is a planting area on the outside of the solidified soil layer, where plant lights can be planted to further protect the filling soil layer. Brief Description of the Drawings

[0037] Figure 1 is a schematic flow chart of the construction method of the mountainous half-filled and half-excavated subgrade by pouring fluid-solidified soil provided by the present invention;

[0038] Figure 2 is a front view schematic diagram of the mountainous half-filled and half-excavated subgrade by pouring fluid-solidified soil provided by the present invention;

[0039] Figure 3 is a partial front view schematic diagram of the construction method of the mountainous half-filled and half-excavated subgrade by pouring fluid-solidified soil provided by the present invention;

[0040] Figure 4 is an internal schematic diagram of the internal setting of the wire mesh cylinder in the planting area provided by the present invention;

[0041] Figure 5 is a front view schematic diagram of the support rod provided by the present invention. Detailed Embodiments

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0044] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0045] Refer to Figures 1-5 as shown, which is a preferred embodiment provided by the present invention.

[0046] A construction method for a mountainous semi - filled and semi - excavated subgrade in the casting construction of fluidized solidified soil, including the following construction methods:

[0047] 1). Excavate the original soil of the slope 100. An excavation area 200 is formed at the upper part of the slope 100, an inner subgrade section 201 is formed at the bottom of the excavation area 200, and a filling area 500 is formed at the lower part of the slope 100; a plurality of steps 501 are formed on the filling area 500. Along the direction from top to bottom of the slope 100, the plurality of steps 501 are sequentially butted, and adjacent steps 501 are inclined and offset.

[0048] 2). Drive support rods 600 arranged in a longitudinal strip shape on each step 501. The lower part of the support rod 600 is inserted into the original soil of the slope body 300 to form a fixed section 602, and the upper part of the support rod 600 extends above the step 501 to form a support section 601.

[0049] 3). Set up a formwork on the step 501. A pouring area is enclosed between the formwork and the step 501, and fluidized solidified soil is poured in the pouring area. The fluidized solidified soil solidifies to form a solidified soil layer 402.

[0050] The fluidized solidified soil is formed by mixing excavated soil, a curing agent and water. The curing agent includes slag micro - powder, fly ash, waste gypsum, water glass, stone powder slag and slag.

[0051] 4), Repeat construction step 3), and form the solidified soil layers 402 on each step 501 along the upward direction of the fill area 500 from bottom to top; multiple solidified soil layers 402 are stacked in sequence from bottom to top to form an integrated fill soil layer 400, and a planting area 405 arranged with an upward opening is formed on the outer side of each solidified soil layer 402;

[0052] An outer subgrade section 401 is formed at the top of the fill soil layer 400, and the inner subgrade section 201 and the outer subgrade section 401 are arranged flush and connected to form a subgrade;

[0053] 5), Cure the fill soil layer 400;

[0054] 6), Plant plants 403 in the planting area 405.

[0055] The above-mentioned construction method for a mountainous semi - filled and semi - excavated subgrade by using fluidized solidified soil pouring construction has the following technical effects:

[0056] 1), Using fluidized solidified soil to pour and fill the fill area 500 to form a fill soil layer, there is no need to roll and form loose materials, which greatly saves construction costs and improves construction efficiency;

[0057] 2), The fill soil layer 400 formed by the solidification of fluidized solidified soil has better strength, stiffness, impermeability and durability, and the fill soil layer 400 is an integrated overall structure, and it is not easy to collapse or slump even under rainwater scouring;

[0058] 3), There is a pouring interface between the bottom of the fill soil layer 400 and the slope body 300. The fluidized solidified soil reacts chemically with the original soil of the slope body 300 to generate ettringite and hydrated gel substances. The pouring interface has higher strength, stiffness, impermeability and durability, and moreover, the pouring interface will not become a channel for groundwater seepage, avoiding the risk of the fill soil layer 400 sliding along the pouring interface;

[0059] 4), Insert the support rod 600 into the original soil to play a shear - resistance or anti - slide role, preventing the risk of the fill soil layer 400 sliding down;

[0060] 5), There is a planting area 405 on the outer side of the solidified soil layer 402, and plants 403 and the like can be planted, which further protects the fill soil layer 400.

[0061] The solidifying agent is blast furnace slag powder, fly ash, waste gypsum, water glass, stone powder slag, slag, etc., which can fully stimulate the mineral activity in the excavated soil. The excavated soil contains clay minerals, enabling it to participate in the hydration reaction and chemical reaction with clay minerals.

[0062] The excavated soil usually contains a large amount of gravel and sand with coarse particles. Therefore, in addition to the chemical reaction between the fine-grained soil and the geotechnical solidifying agent, the coarse particles play a role as a skeleton, further enhancing the strength of the solidified soil layer 402.

[0063] The solidifying agent and the excavated soil are added with an appropriate amount of water and mixed into a fluidized solidified soil, which is used for pouring to form part of the filled soil layer 400. After solidification, the part of the filled soil layer 400 forms a complete block, having high strength, stiffness, impermeability and durability, and is not easily penetrated and eroded by water.

[0064] Meanwhile, the solidifying agent in the fluidized solidified soil chemically reacts with the clay minerals in the original soil near the pouring interface, generating a large amount of hydrated gels of ettringite. After solidification, the pouring interface has much higher strength, stiffness, impermeability and durability than the original soil, which can effectively prevent the infiltration, erosion and softening of groundwater, and avoid the sliding of the filled soil layer 400 along the pouring interface.

[0065] In addition to chemically reacting with the moisture in the excavated soil, the solidifying agent also further chemically reacts with the clay minerals in the excavated soil. Compared with the reaction between traditional cement, lime and soil, the reaction between the solidifying agent and the excavated soil can generate more minerals such as ettringite and calcium silicate hydrate, and then play roles such as connecting and wrapping the soil particles in the excavated soil, making the soil particles form a solidified soil body with certain strength.

[0066] The excavated soil is generally various rock weathered soils excavated from mountains, including residual soil, completely weathered and strongly weathered soils. The excavated soil contains a large amount of coarse particles that are not thoroughly weathered, and most of these coarse particles are rock minerals, such as quartz, feldspar, diabase, hornblende and other particles.

[0067] In addition, the weathered soil also contains a large amount of fine-grained silt and clay particles. Among them, the silt is the rock mineral after further weathering and fragmentation, while the clay particles are mostly weathered into clay minerals such as kaolinite and illite. Generally, the particle size of these clay minerals is below 50 microns.

[0068] For the fluidized solidified soil prepared by combining the excavated soil, the solidifying agent and water, then, in addition to the chemical reaction between the clay particles, water and the solidifying agent in the excavated soil to generate a high-strength fluidized solidified soil, the coarse particles in the excavated soil can also play a role as a skeleton, further enhancing the strength of the solidified soil.

[0069] In this way, by combining the excavated soil with the solidifying agent, a fluidized solidified soil with higher strength than ordinary soil can be generated. If the fluidized solidified soil is used for pouring the roadbed, then the formed roadbed soil not only has high strength and stiffness, but also has good impermeability and durability, forming a pouring interface with high strength and impermeability.

[0070] In this embodiment, in construction step 1), first, the slope surface is cleaned, and the loose soil on the slope 100 is excavated until the bottoms of the excavation area 200 and the filling area 500 are excavated to the original weathered soil body.

[0071] In this embodiment, in construction step 2), the support rod 600 is made of steel material, and the length of the fixed section 602 is between 20% and 50% of the length of the support rod 600.

[0072] As a preferred embodiment, the support rod 600 can be driven in by a vibratory hammer, made of section steel, made of Q235 or Q345 steel, with a diameter or outer diameter between 150 - 500 mm and a wall thickness between 5 - 20 mm.

[0073] In this embodiment, in construction step 2), a fixing hole is drilled downward on the step 501. After the fixed section 602 is inserted into the fixing hole, a slurry is injected into the fixing hole so that the fixed section 602 is fixed to the slope body 300 as a whole. By arranging the fixing holes and through the grouting method, the fixed section 602 placed in the fixing holes forms an integral structure with the slope body 300, and the structure is more stable.

[0074] In construction step 3), the preparation steps of the fluidized solidified soil are as follows:

[0075] 3.1), The excavated soil is screened to form screened soil;

[0076] 3.2), The screened soil and water are stirred and mixed in a mixing drum until they are in a fluid state to form a soil slurry;

[0077] 3.3), The curing agent and water are stirred and mixed to form a curing slurry;

[0078] 3.4), The curing slurry is added to the mixing drum and stirred and mixed with the soil slurry to form fluidized solidified soil.

[0079] The excavated soil contains foreign matters. First, it is screened to remove the impurities larger than 50 mm in particle size; the curing agent is an inorganic hydraulic binder mainly composed of CaO, reactive Al2O3, and SiO2. After it is stirred and mixed with the excavated soil, through the physical and chemical reactions between the components of the curing agent and between the curing agent and the excavated soil, the physical and mechanical properties of the fluidized solidified soil can be significantly improved.

[0080] The application scenarios of the fluidized solidified soil include but are not limited to: backfilling of foundation pit side slopes, pipeline trenches, underground structure roofs, foundation holes, back sides of retaining walls, roadbeds, etc. It is applied in many projects such as building construction, water conservancy, and municipal engineering. It not only has outstanding compressive, anti-seepage, and anti-cracking curing effects, but also has considerable social and economic benefits.

[0081] In addition, according to the weight ratio, the dosage of the curing agent is 10%-20% of the weight of the excavated soil, and the dosage of the water body is 40%-80% of the weight of the excavated soil.

[0082] In this embodiment, in preparation step 3.4), there is a stirring shaft in the mixing drum. During the process of adding the curing slurry into the mixing drum at a set rate, the stirring shaft continuously stirs and mixes the soil slurry synchronously; after all the curing slurry is added into the mixing drum, the stirring shaft continuously stirs and mixes the curing slurry and the soil slurry for a set time so that the curing slurry and the soil slurry are stirred and mixed to form a fluidized solidified soil.

[0083] In this way, during the process of adding the curing slurry, the soil slurry is in a stirred and mixed state synchronously, which can make the stirring and mixing between the soil slurry and the curing slurry more uniform.

[0084] In this embodiment, in construction step 3), a waterproof cloth is covered on the inner side wall of the formwork. The waterproof cloth is closed and surrounds the outer periphery of the pouring area. During the process of pouring the fluidized solidified soil into the pouring area, the waterproof cloth restricts the leakage of the fluidized solidified soil from the outer periphery of the pouring area.

[0085] In this embodiment, in construction step 4), the outer side of the solidified soil layer 402 is sunken downward to form a sunken planting area 405 filled with planting soil; in construction step 6), the roots of the plant 403 are planted in the planting soil. In this way, it is convenient to plant the plant 403 on the solidified soil layer 402.

[0086] In this embodiment, in construction step 4), a wire mesh cylinder is provided in the planting area 405. The wire mesh cylinder includes an outer ring mesh layer 702 arranged in a ring and an inner ring mesh layer 701 arranged in a ring. There is an annular outer ring area between the outer ring mesh layer 702 and the inner ring mesh layer 701, and the inner ring mesh layer 701 encloses to form a central area;

[0087] The bottom of the outer ring mesh layer 702 and the bottom of the inner ring mesh layer 701 are connected as a whole through an annular bottom mesh layer 703, and the top of the outer ring mesh layer 702 and the top of the inner ring mesh layer 701 are connected as a whole through an annular top mesh layer 704. The outer ring mesh layer 702 is embedded in the solidified soil layer 402 and combined with the solidified soil layer 402 as a whole;

[0088] The planting soil fills the outer ring area and the central area and covers the wire mesh cylinder; in construction step 6), the roots of the plant 403 are placed in the central area, and the roots of the plant 403 extend into the outer ring area.

[0089] By arranging the wire mesh cylinder in the planting area 405, the planting soil can be solidified to avoid the loss of the planting soil. Secondly, the inner ring mesh layer 701 of the wire mesh cylinder can stabilize the roots of the plant 403, etc., facilitating the subsequent survival of the plant 403. In addition, the outer ring mesh layer 702 is integrated with the solidified soil layer 402, making the structure of the entire wire mesh cylinder more stable.

[0090] In this embodiment, in construction step 4), the support section 601 is covered in the solidified soil layer 402. The cross-section of the support section 601 is square-shaped. A plurality of inclined pipes 800 are provided on the outer periphery of the support section 601. A groove 804 arranged to be recessed inward is formed on the outer periphery of the support section 601. The inner end of the support section 601 is fixedly docked on the outer periphery of the groove 804, and the outer end of the support section 601 extends freely outward.

[0091] The inclined pipe 800 has a through-hole 801 that penetrates inside and outside. The upper part of the inclined pipe 800 has an upper through-hole 803. The top of the through-hole 801 is communicated with the outside through the upper through-hole 803. The lower part of the inclined pipe 800 has a lower through-hole 802. The bottom of the through-hole 801 is communicated with the outside through the lower through-hole 802.

[0092] When the support section 601 is covered by pouring fluid solidified soil, the fluid solidified soil fills the through-hole 801 and the groove 804, and the support section 601 and the plurality of inclined pipes 800 form an integral body with the solidified soil layer 402.

[0093] After pouring the fluid solidified soil, the formed solidified soil layer 402 penetrates into the through-hole 801, the upper through-hole 803, the lower through-hole 802, and the groove 804, so that the solidified soil layer 402 is more stable with the support rod 600 and the plurality of inclined pipes 800, and can reinforce the solidified soil layer 402 in multiple directions, further playing a shear resistance or anti-slip role for the filled soil layer 400, and preventing the risk of the filled soil layer 400 sliding down.

[0094] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for constructing a semi-filled and semi-excavated roadbed in a mountainous area by pouring fluidized solidified soil, characterized in that: The following construction methods are included: 1) Excavating the original soil of the slope, forming an excavation area at the upper part of the slope, forming an inner roadbed section at the bottom of the excavation area, and forming a filling area at the lower part of the slope; forming a plurality of steps on the filling area, and connecting the plurality of steps in sequence along the direction from top to bottom of the slope, and the adjacent steps are tilted and staggered; 2) driving support rods arranged in longitudinal strips on each of the steps, with the lower part of the support rods inserted into the original soil of the slope to form a fixed section, and the upper part of the support rods extending above the steps to form a supporting section; 3) A template is set on the step, and a casting area is formed between the template and the step, and fluidized solidified soil is cast in the casting area, and the fluidized solidified soil solidifies to form a solidified soil layer; the fluidized solidified soil is formed by mixing excavated soil, a curing agent and water, and the curing agent includes slag powder, fly ash, waste gypsum, water glass, stone powder slag and slag; 4) Repeat the construction step 3) to form a solidified soil layer on each of the steps along the bottom-up direction of the filling area; The plurality of solidified soil layers are stacked in sequence from bottom to top to form an integrated fill soil layer, and a planting area open upward is formed on the outer side of each solidified soil layer; The top of the fill soil layer forms an outer roadbed section, and the inner roadbed section is arranged flush with the outer roadbed section and connected to form a roadbed; 5) Maintaining the fill soil layer; 6) Planting plants in the planting area.

2. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring fluidized solidified soil as claimed in claim 1, characterized in that: In the construction step 1), the slope surface is first cleaned and the loose soil on the slope is removed until the bottom of the excavation area and the bottom of the filling area are excavated to the original weathered soil.

3. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring and constructing fluidized solidified soil as claimed in claim 1, characterized in that: In the construction step 2), the support rod is made of steel material, and the length of the fixed section is between 20% and 50% of the length of the support rod.

4. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring fluidized solidified soil as claimed in claim 1, characterized in that: In the construction step 2), a fixing hole is drilled downward on the step, and after the fixing section is inserted into the fixing hole, slurry is injected into the fixing hole to fix the fixing section and the slope as a whole.

5. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring fluidized solidified soil as claimed in any one of claims 1 to 4, characterized in that: In the construction step 3), the preparation steps of the fluidized solidified soil are as follows: 3.1) Screening the excavated soil to form screened soil; 3.2) Stirring and mixing the screened soil and water in a mixing drum until they are fluidized to form a soil slurry; 3.3) Stirring and mixing the curing agent and water to form a curing slurry; 3.4) Add the solidifying slurry into a mixing drum and mix it with the soil slurry to form the fluidized solidified soil.

6. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring and constructing fluidized solidified soil as claimed in claim 5, characterized in that: In the preparation step 3.4), the mixing drum is provided with a stirring shaft, and during the process of adding the solidifying slurry into the mixing drum at a set rate, the stirring shaft synchronously and continuously stirs and mixes the soil slurry; when all the solidifying slurry is added into the mixing drum, the stirring shaft continuously stirs and mixes the solidifying slurry and the soil slurry for a set time, so that the solidifying slurry and the soil slurry are stirred and mixed to form fluidized solidified soil.

7. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring fluidized solidified soil as claimed in any one of claims 1 to 4, characterized in that: In the construction step 3), the inner wall of the template is covered with a waterproof cloth, and the waterproof cloth is closed around the periphery of the pouring area. During the process of pouring the fluidized solidified soil into the pouring area, the waterproof cloth restricts the fluidized solidified soil from leaking from the periphery of the pouring area.

8. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring fluidized solidified soil as claimed in any one of claims 1 to 4, characterized in that: In the construction step 4), the outer side of the solidified soil layer is sunken downward to form a planting area with the sunken arrangement, and the planting area is filled with planting soil; in the construction step 6), the roots of the plants are planted in the planting soil.

9. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring fluidized solidified soil as claimed in claim 8, characterized in that: In the construction step 4), a wire mesh cylinder is provided in the planting area, the wire mesh cylinder includes an outer ring mesh layer arranged in an annular manner and an inner ring mesh layer arranged in an annular manner, an outer ring area is provided between the outer ring mesh layer and the inner ring mesh layer, and the inner ring mesh layer encloses a middle area; The bottom of the outer ring mesh layer and the bottom of the inner ring mesh layer are connected as a whole through an annular bottom mesh layer, the top of the outer ring mesh layer and the top of the inner ring mesh layer are connected as a whole through an annular top mesh layer, and the outer ring mesh layer is embedded in the solidified soil layer and combined with the solidified soil layer as a whole; The planting soil fills the outer ring area and the middle area, and covers the wire mesh tube; in the construction step 6), the roots of the plants are placed in the middle area, and the root system of the plants extends to the outer ring area.

10. The method for constructing a semi-fill and semi-excavation roadbed in a mountainous area by pouring fluidized solidified soil as claimed in any one of claims 1 to 4, characterized in that: In the construction step 4), the support section is covered in the solidified soil layer; the cross section of the support section is square-shaped, a plurality of inclined tubes are arranged on the outer periphery of the support section, a groove arranged inwardly concave is formed on the outer periphery of the support section, the inner end of the support section is fixedly docked on the outer periphery of the groove, and the outer end of the support section freely extends outward; The inclined tube has a tube hole that penetrates inside and outside, the upper part of the inclined tube has an upper through hole, the top of the tube hole is connected to the outside through the upper through hole, the lower part of the inclined tube has a lower through hole, the bottom of the tube hole is connected to the outside through the lower through hole; When the support section is covered by the fluid solidified soil, the fluid solidified soil fills the pipe holes and the grooves, and the support section and the plurality of inclined pipes are integrated with the solidified soil layer.

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