An environment-friendly solidification structure for the base soil of a canal bottom to prevent frost heaving in seasonal frozen soil regions and its construction method

Abstract

The present invention relates to an anti-freezing heaving environmental protection curing structure for the foundation soil at the bottom of a canal in seasonally frozen soil regions and its construction method, belonging to the technical field of anti-seepage for the bottom of a canal. It includes an anti-seepage layer, a concrete lining structure layer, a fiber composite base soil layer, a gravel layer, and a sand cushion layer that are sequentially laid from top to bottom on the bottom of the canal. In the present invention, by laying a fiber composite base soil layer on the gravel layer, since the fiber composite base soil layer includes soil and an organic base soil curing agent, the epoxy resin binder and silica fume in the organic base soil curing agent can strengthen the connection strength between the gravel layer and the sand cushion layer and the foundation soil at the bottom of the canal, improving the anti-seepage characteristics and freeze-thaw characteristics of the foundation soil at the bottom of the canal. At the same time, by laying an anti-seepage layer on the concrete lining structure layer, since the anti-seepage layer contains sodium alginate, chitosan, sodium polyacrylate, and an acidity regulator, it can improve the brittleness of the mortar-laid stone and reduce the water seepage of the anti-seepage layer, thereby enhancing the freeze-thaw characteristics of the anti-seepage layer.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-seepage of canal bottoms, and particularly relates to an environment-friendly curing structure for frost-heaving prevention of canal bottom base soil in seasonally frozen soil regions. Background Art

[0002] Traditional anti-seepage methods for canal bottoms usually involve constructing a lining concrete structure at the bottom of the canal. However, ordinary lining concrete structures are vulnerable to weathering, resulting in relatively high later maintenance costs. Moreover, due to the good water absorption of concrete, during the water conveyance process of the canal, water will seep into the concrete structure. When the winter temperature is relatively low, the water will condense and expand, damaging the lining concrete structure. In order to improve the anti-seepage performance of the canal bottom lining structure, artificial intervention methods such as temporary rapid repair are often required to meet the requirements of anti-seepage and freeze-thaw resistance of the canal bottom design.

[0003] A large number of existing studies mainly focus on reducing the water loss at the canal bottom through different construction methods, materials, and lining structures. However, although the existing construction materials and structures have been widely used, the canal bottom lining structure still has disadvantages such as poor anti-seepage ability, damage to the ecological environment, and poor frost resistance, making it difficult to meet the requirements of environmental protection and engineering durability.

[0004] Therefore, how to design an environment-friendly curing structure for frost-heaving prevention of canal bottom base soil in seasonally frozen soil regions is an urgent problem to be solved. Summary of the Invention

[0005] The present invention provides an environment-friendly curing structure for frost-heaving prevention of canal bottom base soil in seasonally frozen soil regions, which solves the technical problems of poor anti-seepage performance and frost resistance of the existing canal bottom lining concrete structure.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: An environment-friendly curing structure for frost-heaving prevention of canal bottom base soil in seasonally frozen soil regions includes an anti-seepage layer, a concrete lining structure layer, a fiber composite base soil layer, a gravel layer, and a sand cushion layer, which are sequentially laid from top to bottom on the canal bottom.

[0007] Among them, the fiber composite base soil layer includes soil and an organic base soil curing agent. The organic base soil curing agent accounts for 2% - 6% of the total weight of the fiber composite base soil layer. By weight, the organic base soil curing agent includes: 10 - 15 parts of epoxy resin binder, 20 - 50 parts of gravel, 7 - 11 parts of straw, 0.9 - 4 parts of silica fume, and 12 - 17 parts of humus soil.

[0008] The anti-seepage layer includes grouted stone and a gelling adsorption material. The gelling adsorption material accounts for 1% - 7% of the total weight of the anti-seepage layer. By weight, the gelling adsorption material includes: 5 - 11 parts of sodium alginate, 4 - 9 parts of chitosan, 7 - 21 parts of sodium polyacrylate, and 9 - 11 parts of acidity regulator.

[0009] The beneficial effects of the present invention are as follows: By laying a fiber composite base soil layer on the crushed stone layer, since the fiber composite base soil layer includes soil and an organic base soil curing agent, the epoxy resin binder and silica fume in the organic base soil curing agent can enhance the connection strength between the crushed stone layer and the sand cushion layer and the canal bottom base soil, improving the anti-seepage characteristics and freeze-thaw characteristics of the canal bottom base soil; at the same time, by laying an anti-seepage layer on the concrete lining structure layer, since the anti-seepage layer contains sodium alginate, chitosan, sodium polyacrylate and an acidity regulator, it can improve the brittleness of the grouted stone and reduce the water seepage of the anti-seepage layer, thereby enhancing the freeze-thaw characteristics of the anti-seepage layer;

[0010] In addition, natural or artificial water discharges flow into the river. During the flow of various substances, due to gravity, a large amount of sediment accumulates in the canal. There will be a large amount of sediment at the bottom above the concrete structure of the canal bottom lining. The foreign materials and their curing technologies often cannot meet the requirements of various engineering treatments. However, the gelling adsorption material of the present invention incorporated into the anti-seepage layer can treat heavy metal elements such as nickel, copper, chromium, lead, arsenic, and mercury through adsorption, reducing the number of heavy metal elements in the water, reducing water resource pollution, improving water resource utilization rate, protecting the biodiversity inside the water body, and having the characteristics of being economical and environmentally friendly, removing heavy metal elements and anti-freeze-thaw.

[0011] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0012] Further, the organic base soil curing agent accounts for 3% of the total weight of the fiber composite base soil layer. The organic base soil curing agent, by weight, includes: 10 parts of epoxy resin binder, 20 parts of gravel, 7 parts of straw, 2 parts of silica fume, and 13 parts of humus soil;

[0013] The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer. The gelling adsorption material, by weight, includes: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0014] Further, the organic base soil curing agent accounts for 3% of the total weight of the fiber composite base soil layer. The organic base soil curing agent, by weight, includes: 14 parts of epoxy resin binder, 20 parts of gravel, 7 parts of straw, 2 parts of silica fume, and 13 parts of humus soil;

[0015] The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer. The gelling adsorption material, by weight, includes: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0016] Further, the organic base soil curing agent accounts for 4% of the total weight of the fiber composite base soil layer. The organic base soil curing agent, by weight, includes: 15 parts of epoxy resin binder, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0017] The gelling adsorbent material accounts for 2% of the total weight of the anti-seepage layer. The gelling adsorbent material, by weight parts, includes: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0018] Furthermore, the organic-based soil curing agent accounts for 4% of the total weight of the fiber composite soil layer. The organic-based soil curing agent, by weight parts, includes: 15 parts of epoxy resin binder, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0019] The gelling adsorbent material accounts for 2% of the total weight of the anti-seepage layer. The gelling adsorbent material, by weight parts, includes: 11 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0020] Furthermore, the organic-based soil curing agent accounts for 4% of the total weight of the fiber composite soil layer. The organic-based soil curing agent, by weight parts, includes: 15 parts of epoxy resin binder, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0021] The gelling adsorbent material accounts for 2% of the total weight of the anti-seepage layer. The gelling adsorbent material, by weight parts, includes: 11 parts of sodium alginate, 5 parts of chitosan, 19 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0022] Furthermore, the organic-based soil curing agent accounts for 4% of the total weight of the fiber composite soil layer. The organic-based soil curing agent, by weight parts, includes: 15 parts of epoxy resin binder, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0023] The gelling adsorbent material accounts for 6% of the total weight of the anti-seepage layer. The gelling adsorbent material, by weight parts, includes: 11 parts of sodium alginate, 5 parts of chitosan, 19 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0024] Furthermore, the laying thickness of the sand cushion layer is 4.5 cm - 5 cm; the laying thickness of the gravel layer is 9 - 10 cm; the laying thickness of the anti-seepage layer is 4 - 6 cm.

[0025] Furthermore, the flatness of the bottom base soil of the water channel is between 0.5 - 1 cm / m, and the compaction density is 0.72 - 0.78 g / cm 3 .

[0026] In addition, the present invention also provides a construction method for the environmentally friendly curing structure of the bottom base soil of the anti-freezing heaving channel in the seasonal frozen soil area, and the steps are as follows:

[0027] S1. Lay a sand cushion layer, trim the base soil of the canal bottom to ensure that the flatness of the base soil of the canal bottom is between 0.5 - 1 cm / m. When the environment does not allow continuous construction, use geotextile or plastic sheeting to cover the canal bottom to prevent water flow scouring. When the environment allows continuous construction, evenly lay coarse sand on the canal bottom, with the laying thickness of the coarse sand being 4.5 cm - 5 cm. After laying, compact it (the compacted density is 0.72 - 0.78 g / cm 3 ), and form a sand cushion layer after compaction;

[0028] S2. Lay a crushed stone layer. Lay stones on the sand cushion layer, with the laying thickness being 9 - 10 cm. After laying, compact it until the stones are not loose to form a crushed stone layer;

[0029] S3. Lay a fiber composite base soil layer. Weigh each raw material according to the fiber composite base soil layer, stir evenly, add water and stir, then evenly lay it on the crushed stone layer, trim the surface of the fiber composite base soil layer, roll and compact it, cover it with straw bags, and sprinkle water for curing for 7 days. After reaching the design strength standard, form a fiber composite base soil layer;

[0030] S4. Lay a concrete lining structure layer. Set up formwork, trial - mix concrete, check the slump, vibrate, pour and form. After forming, first cover it with plastic film to ensure moist curing for no less than 28 days. When there is low - temperature or negative - temperature weather, heat - preservation measures should be taken for curing. After reaching the design strength standard, form a concrete lining structure layer;

[0031] S5. Lay an anti - seepage layer. Weigh each raw material according to the anti - seepage layer, stir evenly, add water and stir, then evenly lay it on the laid concrete lining structure layer, with the laying thickness being 5 - 6 cm. Trim the surface of the anti - seepage layer, vibrate and compact it to ensure that the mortar - laid stone blocks are arranged staggeredly.

[0032] The beneficial effects of adopting the above construction method for the environmentally - friendly solidification structure of the canal bottom base soil are as follows: It can effectively reduce the recharge of groundwater by seepage, prevent secondary salinization of the soil in the irrigation area, and is beneficial to reducing the occurrence of waterlogging disasters. The addition of a gelling and adsorbing material in the anti - seepage layer can additionally reduce the loss during the water conveyance process of the canal by 40%, improve the water conveyance capacity, and can improve the anti - seepage performance and the characteristics of repeated freeze - thaw of the mortar - laid stone blocks on the basis of reducing the daily inspection frequency;

[0033] At the same time, the organic base soil solidifying agent is prepared from industrial and agricultural waste such as straw, silica fume, and humus soil, with good social and environmental benefits. It can reduce the quantity of heavy metal elements in water, reduce water resource pollution, and improve water resource utilization rate. At the same time, the organic base soil solidifying agent is used to treat the base soil at the bottom of the canal, which can further reduce the influence of capillary action on the lining anti - seepage layer, improve the utilization rate of irrigation water resources in the farming area, reduce the waste of fresh water resources, and effectively solve the technical problems of bottom seepage of the canal and freeze - thaw cracks and bulges in the lining structure.

[0034] The early and late anti-seepage performance of the canal bottom treated by this curing method is about 2.3 times that of the traditional lining method, the maximum frost heave settlement height is about 0.7 times that of the traditional lining method, and the heavy metal elements such as copper in water are about 0.5 times that of the traditional lining method. Description of the Drawings

[0035] Figure 1 This is a schematic diagram of an environmentally friendly curing structure for the base soil of an anti-freezing and swelling canal bottom in a seasonal frozen soil area of the present invention.

[0036] In the drawings, the list of components represented by each reference numeral is as follows:

[0037] 1. Anti-seepage layer, 2. Concrete lining structure layer, 3. Fiber composite base soil layer, 4. Gravel layer, 5. Sand cushion layer. Detailed Embodiment

[0038] The principles and features of the present invention will be described below in conjunction with the drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0039] As Figure 1 shown, an environmentally friendly curing structure for the base soil of an anti-freezing and swelling canal bottom in a seasonal frozen soil area includes an anti-seepage layer 1, a concrete lining structure layer 2, a fiber composite base soil layer 3, a gravel layer 4, and a sand cushion layer 5 that are sequentially laid from top to bottom on the canal bottom.

[0040] Among them, the fiber composite base soil layer 3 includes soil and an organic base soil curing agent. The organic base soil curing agent accounts for 2% - 6% of the total weight of the fiber composite base soil layer 3. By weight, the organic base soil curing agent includes: 10 - 15 parts of epoxy resin binder, 20 - 50 parts of gravel, 7 - 11 parts of straw, 0.9 - 4 parts of silica fume, and 12 - 17 parts of humus soil;

[0041] The anti-seepage layer 1 includes mortar-laid stone and a gelling and adsorbing material. The gelling and adsorbing material accounts for 1% - 7% of the total weight of the anti-seepage layer 1. By weight, the gelling and adsorbing material includes: 5 - 11 parts of sodium alginate, 4 - 9 parts of chitosan, 7 - 21 parts of sodium polyacrylate, and 9 - 11 parts of acidity regulator.

[0042] A construction method for an environmentally friendly curing structure of the base soil of an anti-freezing and swelling canal bottom in a winter frozen soil area is characterized by including the following steps:

[0043] S1. Lay the sand cushion layer 5, trim the base soil of the canal bottom to ensure that the flatness of the base soil is between 0.5 - 1 cm / m, evenly lay coarse sand on the canal bottom, and compact it to form the sand cushion layer;

[0044] S2. Lay the gravel layer 4, and lay stones on the sand cushion layer 5 to form the gravel layer;

[0045] S3. Lay the fiber composite base soil layer 3. Weigh each raw material according to the fiber composite base soil layer, stir evenly, add water and stir again, then evenly lay it on the gravel layer 4, level the surface, roll it compactly, cover it with straw bags, and sprinkle water for curing to form the fiber composite base soil layer 3;

[0046] S4. Lay the concrete lining structure layer 2. Set up the formwork, trial-mix the concrete, check the slump, vibrate, and pour it into shape. After moist curing, form the concrete lining structure layer 2;

[0047] S5. Lay the anti-seepage layer 1. Weigh each raw material according to the anti-seepage layer, stir evenly, add water and stir again, then evenly lay it on the concrete lining structure layer 2, level the surface and vibrate it compactly to ensure that the stone materials are staggered, forming the anti-seepage layer 1.

[0048] Example 1:

[0049] Successively lay the sand cushion layer 1, gravel layer 2, fiber composite base soil layer 3, concrete lining structure layer 4, and anti-seepage layer 5 on the bottom of the water channel. Among them,

[0050] The fiber composite base soil layer 3 includes soil and organic base soil curing agent. The organic base soil curing agent accounts for 3% of the total weight of the fiber composite base soil layer 3. Calculated by weight parts, the organic base soil curing agent includes: 10 parts of epoxy resin binder, 20 parts of gravel, 7 parts of straw, 2 parts of silica fume, and 13 parts of humus soil;

[0051] The anti-seepage layer 5 includes mortar-laid stone materials and gel adsorption materials. The gel adsorption materials account for 2% of the total weight of the anti-seepage layer 5. Calculated by weight parts, the gel adsorption materials include: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0052] Example 2:

[0053] Successively lay the sand cushion layer 1, gravel layer 2, fiber composite base soil layer 3, concrete lining structure layer 4, and anti-seepage layer 5 on the bottom of the water channel. Among them,

[0054] The fiber composite base soil layer 3 includes soil and organic base soil curing agent. The organic base soil curing agent accounts for 3% of the total weight of the fiber composite base soil layer 3. Calculated by weight parts, the organic base soil curing agent includes: 14 parts of epoxy resin binder, 20 parts of gravel, 7 parts of straw, 2 parts of silica fume, and 13 parts of humus soil.

[0055] The anti-seepage layer 5 includes mortar-laid stone materials and gel adsorption materials. The gel adsorption materials account for 2% of the total weight of the anti-seepage layer 5. Calculated by weight parts, the gel adsorption materials include: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0056] Example 3:

[0057] Lay a sand cushion layer 1, a crushed stone layer 2, a fiber composite base soil layer 3, a concrete lining structure layer 4 and an anti-seepage layer 5 on the bottom of the water channel in sequence. Among them,

[0058] The fiber composite base soil layer 3 includes soil and an organic base soil curing agent. The organic base soil curing agent accounts for 4% of the total weight of the fiber composite base soil layer 3. By weight, the organic base soil curing agent includes: 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0059] The anti-seepage layer 5 includes grouted rubble masonry and a gelling adsorption material. The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer 5. By weight, the gelling adsorption material includes: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0060] Example 4:

[0061] Lay a sand cushion layer 1, a crushed stone layer 2, a fiber composite base soil layer 3, a concrete lining structure layer 4 and an anti-seepage layer 5 on the bottom of the water channel in sequence. Among them,

[0062] The fiber composite base soil layer 3 includes soil and an organic base soil curing agent. The organic base soil curing agent accounts for 4% of the total weight of the fiber composite base soil layer 3. By weight, the organic base soil curing agent includes: 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0063] The anti-seepage layer 5 includes grouted rubble masonry and a gelling adsorption material. The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer 5. By weight, the gelling adsorption material includes: 11 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0064] Example 5:

[0065] Lay a sand cushion layer 1, a crushed stone layer 2, a fiber composite base soil layer 3, a concrete lining structure layer 4 and an anti-seepage layer 5 on the bottom of the water channel in sequence. Among them,

[0066] The fiber composite base soil layer 3 includes soil and an organic base soil curing agent. The organic base soil curing agent accounts for 4% of the total weight of the fiber composite base soil layer 3. By weight, the organic base soil curing agent includes: 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0067] The anti-seepage layer 5 includes grouted rubble masonry and a gelling adsorption material. The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer 5. By weight, the gelling adsorption material includes: 11 parts of sodium alginate, 5 parts of chitosan, 19 parts of sodium polyacrylate, and 10 parts of acidity regulator

[0068] Example 6:

[0069] Lay a sand cushion layer 1, a crushed stone layer 2, a fiber composite base soil layer 3, a concrete lining structure layer 4, and an anti-seepage layer 5 on the bottom of the water channel in sequence. Among them,

[0070] The fiber composite base soil layer 3 includes soil and an organic base soil curing agent. The organic base soil curing agent accounts for 4% of the total weight of the fiber composite base soil layer 3. By weight, the organic base soil curing agent includes: 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil;

[0071] The anti-seepage layer 5 includes mortar-laid dressed stones and a gelling and adsorbing material. The gelling and adsorbing material accounts for 6% of the total weight of the anti-seepage layer 5. By weight, the gelling and adsorbing material includes: 11 parts of sodium alginate, 5 parts of chitosan, 19 parts of sodium polyacrylate, and 10 parts of acidity regulator.

[0072] Example 7:

[0073] Lay clay with a water content of 15% on the bottom of the water channel.

[0074] Refer to the relevant regulations of the "Test Regulations for Inorganic Binding Material Stabilized Materials in Highway Engineering" for implementation. Use the static compaction method to prepare specimens. The specimen size is Φ150mm×h150mm, and the specimens are formed with a compaction degree of 95%.

[0075] Put the prepared test soil into the mold and compact it with a compaction degree of 95%. Keep the load for 2 minutes, demold, cure until the age, and take out for testing. The test contents include the unconfined compressive strength of 14-day immersion and non-immersion, the splitting strength of 14-day immersion, and the flexible wall permeability test of 14 days. Make a reduced-scale model (1:200) of a wide and shallow trapezoidal cross-section, and test the frost heave deformation of the curing agent after curing.

[0076] Table 1: Comparison table of curing results of Examples 1-7

[0077]

[0078] Analysis - Through the unconfined compressive strength of 14-day immersion and non-immersion, the splitting strength of 14-day immersion, and the flexible wall permeability test of 14 days, making a reduced-scale model (1:200) of a wide and shallow trapezoidal cross-section, and testing the frost heave deformation of the curing agent after curing, it can be known that the content of epoxy resin adhesive in the fiber composite base soil layer can significantly improve the anti-seepage performance and splitting performance of the base soil; the more the organic base soil curing agent accounts for the total weight of the fiber composite base soil layer, the more obvious the improvement of the anti-seepage performance and splitting performance of the base soil. The organic base soil curing agent of this fiber composite base soil layer can significantly improve the crack resistance and anti-seepage performance of the soil, has a low price, and has good application prospects.

[0079] Table 2: Comparison results of ion content in water of Examples 1-7

[0080]

[0081] Analysis - By testing the water samples of the 14 - day immersion test for the content of heavy metal elements in water. From the test results, it can be seen that the content of the gelling adsorption material in the anti - seepage layer can significantly adsorb heavy metal elements in water, and the effects of sodium polyacrylate and sodium alginate in adsorbing heavy metal elements are obvious. The more the gelling adsorption material accounts for the total weight of the anti - seepage layer, the more obvious the reduction in the content of heavy metal elements in water. The gelling adsorption material of this anti - seepage layer can reduce the content of heavy metal elements in water and has broad application prospects.

[0082] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An environmentally friendly solidification structure for the base soil of a canal bottom to prevent frost heaving in seasonally frozen ground areas, characterized in that , including an anti-seepage layer (1), a concrete lining structure layer (2), a fiber composite base soil layer (3), a gravel layer (4), and a sand cushion layer (5) laid on the bottom of the water channel from top to bottom in sequence. Among them, the fiber composite base soil layer (3) includes soil and an organic base soil curing agent. The organic base soil curing agent accounts for 2% - 6% of the total weight of the fiber composite base soil layer (3). By weight parts, the organic base soil curing agent includes: 10 - 15 parts of epoxy resin adhesive, 20 - 50 parts of gravel, 7 - 11 parts of straw, 0.9 - 4 parts of silica fume, and 12 - 17 parts of humus soil. The anti-seepage layer (1) includes grouted dressed stones and a gelling adsorption material. The gelling adsorption material accounts for 1% - 7% of the total weight of the anti-seepage layer (1). By weight parts, the gelling adsorption material includes: 5 - 11 parts of sodium alginate, 4 - 9 parts of chitosan, 7 - 21 parts of sodium polyacrylate, and 9 - 11 parts of acidity regulator. The laying thickness of the sand cushion layer (5) is 4.5 cm - 5 cm; the laying thickness of the gravel layer (4) is 9 - 10 cm; the laying thickness of the anti-seepage layer (1) is 4 - 6 cm. The flatness of the base soil of the water channel is between 0.5 - 1 cm / m, and the compaction density is 0.72 - 0.78 g / cm 3 .

2. The environmentally friendly solidification structure for the frost heave prevention of the foundation soil of the canal bottom in seasonal frozen soil regions according to claim 1, wherein, The organic base soil curing agent accounts for 3% of the total weight of the fiber composite base soil layer (3). By weight parts, the organic base soil curing agent includes: 10 parts of epoxy resin adhesive, 20 parts of gravel, 7 parts of straw, 2 parts of silica fume, and 13 parts of humus soil. The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer. By weight parts, the gelling adsorption material includes: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

3. An environmentally friendly solidification structure for the frost heave prevention of the bottom base soil in seasonal frozen soil areas according to claim 1, characterized in that, The organic base soil curing agent accounts for 3% of the total weight of the fiber composite base soil layer (3). By weight parts, the organic base soil curing agent includes: 14 parts of epoxy resin adhesive, 20 parts of gravel, 7 parts of straw, 2 parts of silica fume, and 13 parts of humus soil. The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer (1). By weight parts, the gelling adsorption material includes: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

4. An environmentally friendly solidification structure for the frost heave prevention of the foundation soil at the bottom of a canal in a seasonal frozen soil area according to claim 1, characterized in that, The organic base soil curing agent accounts for 4% of the total weight of the fiber composite base soil layer (3). By weight parts, the organic base soil curing agent includes: 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil. The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer (1). By weight parts, the gelling adsorption material includes: 7 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

5. An environmentally friendly solidification structure for the frost heave prevention of the foundation soil at the bottom of a canal in seasonally frozen soil regions according to claim 1, characterized in that, The organic base soil curing agent accounts for 4% of the total weight of the fiber composite base soil layer (3). By weight parts, the organic base soil curing agent includes: 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil. The gelling adsorption material accounts for 2% of the total weight of the anti-seepage layer (1). By weight parts, the gelling adsorption material includes: 11 parts of sodium alginate, 5 parts of chitosan, 8 parts of sodium polyacrylate, and 10 parts of acidity regulator.

6. The environmentally friendly solidifying structure of the frost heave prevention canal bottom base soil in seasonal frozen soil areas according to claim 1, characterized in that, The organic-based soil curing agent accounts for 4% of the total weight of the fiber composite-based soil layer (3), and the organic-based soil curing agent comprises, by weight: 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil; The gelled adsorption material accounts for 2% of the total weight of the anti-seepage layer (1). The gelled adsorption material comprises, by weight, 11 parts of sodium alginate, 5 parts of chitosan, 19 parts of sodium polyacrylate, and 10 parts of acidity regulator.

7. An environmentally friendly solidification structure for the frost heave prevention of the bottom base soil in seasonal frozen soil regions according to claim 1, characterized in that, The organic-based soil curing agent accounts for 4% of the total weight of the fiber composite-based soil layer (3), and the organic-based soil curing agent comprises, by weight, 15 parts of epoxy resin adhesive, 25 parts of gravel, 8 parts of straw, 4 parts of silica fume, and 17 parts of humus soil; The gelled adsorption material accounts for 6% of the total weight of the anti-seepage layer (1). The gelled adsorption material comprises, by weight: 11 parts of sodium alginate, 5 parts of chitosan, 19 parts of sodium polyacrylate, and 10 parts of acidity regulator.

8. A construction method of the environmentally friendly solidification structure for the frost heave prevention of the foundation soil at the bottom of the canal in seasonal frozen soil areas according to any one of claims 1 to 7, characterized in that, The steps include: S1, laying a sand cushion layer (5), trimming the channel bottom soil, ensuring that the channel bottom soil flatness is between 0.5-1 cm / m, and evenly laying coarse sand on the channel bottom and compacting it to form a sand cushion layer; S2, laying a crushed stone layer (4), laying stones on the sand cushion layer (5) to form a crushed stone layer; S3, laying a fiber composite base soil layer (3), weighing various raw materials according to the fiber composite base soil layer, stirring them evenly, adding water and stirring, and evenly laying them on the crushed stone layer (4), leveling the surface, compacting them, covering them with straw bags, and sprinkling water for curing to form a fiber composite base soil layer (3); S4, laying the concrete lining structure layer (2), erecting a formwork, trial mixing the concrete, checking the slump, vibrating, pouring and shaping, and after moistening and curing, forming the concrete lining structure layer (2); S5. Laying an anti-seepage layer (1), weighing various raw materials according to the anti-seepage layer, mixing them evenly, adding water and stirring, and evenly laying them on the concrete lining structure layer (2), leveling the surface, vibrating and compacting, ensuring that the materials and stones are arranged in a staggered manner, and forming an anti-seepage layer (1).

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