Construction method of solidification by adjusting proportion of each component of solidification agent according to soil layer property

Abstract

The application relates to the technical field of solidifying agents and discloses a construction method for adjusting the proportion of components of a solidifying agent according to the properties of soil layers, which comprises the following steps: identifying the arrangement depth of each stratum of a construction site and the soil body characteristics in the stratum, determining the water-cement ratio and component formula of the solidifying agent according to the soil body characteristics in each stratum; arranging the components of the solidifying agent, including cement, mineral powder, fly ash, slag reducer, anhydrous sodium sulfate and water bodies, and respectively arranging the components independently and respectively connecting the components to a stirring barrel, a spraying pipe is connected to the stirring barrel, the spraying pipe is arranged in a stirring rod and extends to the bottom of the stirring rod; in the process of drilling the stirring rod in the stratum, a controller identifies the soil body characteristics of the drilled stratum according to the drilling depth of the drill rod; according to the soil body characteristics and the component formula, the controller arranges the components of the solidifying agent in the stirring barrel, the components in the stirring barrel are mixed and stirred to form the solidifying agent; and the solidifying agent is sprayed out from the bottom of the drill rod through the spraying pipe and is mixed and stirred with the soil body in the stratum.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solidifying agent, in particular to a construction method for adjusting the proportion of each component of solidifying agent according to the properties of soil layers. BACKGROUND

[0002] In the existing construction of mixing piles, cement slurry or soil solidifying agent is often used as a reinforcing slurry to reinforce soft soil so as to achieve the expected solidification treatment effect. The cement slurry solidification treatment method often requires a high cement content to make the reinforced soil reach the design strength. However, the use of cement in large quantities will increase the construction cost of the project, and the cement slurry reinforcement treatment method is not environmentally friendly. The use of solidifying agent has a low price, but the method of using a single formula of solidifying agent to reinforce the entire ground layer has a significant difference in the reinforcement effect of different soil layers, and the randomness of the reinforcement effect is large, so it is difficult to achieve the expected reinforcement effect.

[0003] In the prior art, whether cement slurry or solidifying agent is used as a reinforcing agent, the essence is to reinforce the entire ground layer by mixing a single fixed component with water to prepare a reinforcing slurry. This method of solidification treatment using a reinforcing slurry with a single ratio cannot adapt to the situation, comprehensively consider the differences between different ground layers, and is difficult to achieve the expected reinforcement effect, while increasing the construction cost. SUMMARY

[0004] The present application relates to the technical field of solidifying agent, in particular to a construction method for adjusting the proportion of each component of solidifying agent according to the properties of soil layers.

[0005] The present application is implemented by adjusting the proportion of each component of solidifying agent according to the properties of soil layers, and the construction method comprises the following construction steps:

[0006] 1) Before the construction of mixing piles, surveying holes are drilled for surveying to identify the arrangement depth of each ground layer in the construction site and the soil properties in the ground layer. According to the soil properties in each ground layer, the water-cement ratio and the component formula of the solidifying agent are determined.

[0007] 2) The components of the solidifying agent include cement, mineral powder, fly ash, slag reducer, anhydrous sodium sulfate and water. The cement, mineral powder, fly ash, slag reducer, anhydrous sodium sulfate and water are arranged separately and connected to the mixing barrel. The mixing barrel is connected to a shotcrete pipe, the shotcrete pipe is placed in the mixing rod and extends to the bottom of the mixing rod.

[0008] 3) during the drilling of the stirring rod in the stratum, the controller correspondingly identifies the soil property of the stratum according to the drilling depth of the drill rod; according to the soil property and the component formula, the controller places the components of the solidifying agent in the stirring barrel, the components in the stirring barrel form the solidifying agent through mixing and stirring; the solidifying agent is sprayed out from the bottom of the drill rod through the gunite pipe and mixed and stirred with the soil in the stratum.

[0009] Optionally, the construction step 3) is repeated until the soil mixed and stirred with the solidifying agent in the stratum forms a mixing pile.

[0010] Optionally, along the arrangement direction from top to bottom of the construction site, the construction site sequentially includes a plain fill stratum, a mucky clay stratum, a coarse gravelly sand stratum, a sandy clay stratum and a fully weathered mixed granite stratum.

[0011] Optionally, when the stirring rod drills in the plain fill stratum, the components of the solidifying agent include 10% to 55% of cement, 20% to 70% of mineral powder, 10% to 20% of fly ash, 10% to 25% of slag reducer and 2% to 10% of anhydrous sodium sulfate according to the mass component.

[0012] The water-cement ratio of the solidifying agent is 0.5 to 2, and the incorporation ratio of the solidifying agent in the stratum is ≥5%.

[0013] Optionally, when the stirring rod drills in the mucky clay stratum, the components of the solidifying agent include 15% to 75% of cement, 20% to 70% of mineral powder, 10% to 20% of fly ash, 5% to 30% of slag reducer and 2% to 10% of anhydrous sodium sulfate according to the mass component.

[0014] The water-cement ratio of the solidifying agent is 0.5 to 2, and the incorporation ratio of the solidifying agent in the stratum is ≥5%.

[0015] Optionally, when the stirring rod drills in the plain fill stratum, the components of the solidifying agent include 5% to 55% of cement, 10% to 90% of mineral powder, 10% to 35% of fly ash, 5% to 25% of slag reducer and 2% to 10% of anhydrous sodium sulfate according to the mass component.

[0016] The water-cement ratio of the solidifying agent is 0.5 to 2, and the incorporation ratio of the solidifying agent in the stratum is ≥3%.

[0017] The water-cement ratio of the solidifying agent is 0.5-2, and the mixing ratio of the solidifying agent in the soil layer is greater than or equal to 3%.

[0018] Optionally, during the drilling of the stirring rod in the fully weathered mixed granite soil layer, the components of the solidifying agent include 5-55% of cement, 10-90% of mineral powder, 15-35% of fly ash, 5-25% of slag reducer, and 2-10% of anhydrous sodium sulfate, in terms of mass components.

[0019] The water-cement ratio of the solidifying agent is 0.5-2, and the mixing ratio of the solidifying agent in the soil layer is greater than or equal to 3%.

[0020] Optionally, the cement, mineral powder, fly ash, slag reducer, and anhydrous sodium sulfate are respectively stored in the storage barrels, and the water body is communicated with the stirring barrel through the water pipe; the stirring barrel has a longitudinally arranged stirring cavity, and the bottom of the stirring cavity has a plurality of water inlets which are arranged at intervals around the center of the stirring cavity.

[0021] The water inlet extends upwardly with a water inlet pipe, the water inlet pipe is longitudinally arranged, the top of the water inlet pipe has a top injection hole, and the side wall of the water inlet pipe has a plurality of side injection holes; the stirring cavity is provided with a rotating cylinder which is located in the surrounding area of the plurality of water inlet pipes; the rotating cylinder has a cylinder cavity, and the side wall of the rotating cylinder has a plurality of rotary injection holes which are arranged at intervals along the circumference of the rotating cylinder.

[0022] The construction step 3) is that, according to the soil body characteristics and the component formula, the controller controls the components in the plurality of storage barrels to fall into the cylinder cavity, the rotating cylinder is synchronously rotated, the components falling into the cylinder cavity are rotated and injected into the stirring cavity through the rotary injection holes, at the same time, the water body enters the plurality of water inlet pipes, is injected into the stirring cavity through the top injection hole and the plurality of side injection holes, is mixed and stirred with the components rotated and injected, and the solidifying agent is formed.

[0023] Optionally, the center of the bottom of the cylinder cavity has an air inlet, when the rotating cylinder is rotating, the air inlet injects high-pressure gas into the through cavity from bottom to top, disperses the components in the through cavity, and drives the components to blow towards the rotary injection holes of the rotating cylinder.

[0024] Compared with the prior art ，The application provides a construction method for adjusting the proportion of each component of a solidifying agent according to the properties of soil layers, wherein, before construction, a hole is drilled to identify the arrangement depth of each stratum of a construction site and the properties of the soil in the stratum, the water-cement ratio and the component formula of the solidifying agent are determined according to the survey, that is, the soil in each stratum, the cement, the mineral powder, the fly ash, the slag reducer, the anhydrous sodium sulfate and the water body are arranged separately and connected with a stirring barrel, the stirring barrel is further connected with a guniting pipe, the guniting pipe is drilled into the stratum synchronously with the stirring rod, the controller can monitor the drilling depth of the stirring rod and identify the pre-set component formula corresponding to the stratum soil at the drilling depth, according to the component formula, the cement, the mineral powder, the fly ash, the slag reducer, the anhydrous sodium sulfate and the water body enter into the stirring barrel in the set proportion to be stirred, the solidifying agent matched with the stratum soil at the drilling depth is formed, and the solidifying agent is sprayed out from the bottom of the drill rod through the guniting pipe and mixed and stirred with the soil in the stratum. In this way, the construction cost is effectively controlled, the solidification quality is ensured, the expected reinforcement effect is achieved, and the purpose of reducing cost and increasing benefit is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 It is the connection schematic view of the stirring barrel, the storage barrel and the water pipe provided by the application;

[0026] Fig. 2 It is the cross-sectional schematic view of the stirring barrel provided by the application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the application clearer, the application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0028] The implementation of the application is described in detail below in combination with specific examples.

[0029] In the drawings of the present embodiment, the same or similar reference numerals correspond to the same or similar parts; in the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] Referring to Figs. 1-2 , the preferred embodiment provided by the application is shown.

[0031] The application provides a construction method for adjusting the proportion of components of a solidifying agent according to the properties of soil layers, and comprises the following steps:

[0032] 1. Before the construction of the mixing pile, a survey hole is drilled to identify the depth of each stratum in the construction site and the properties of the soil in the stratum, and the water-cement ratio and component formula of the solidifying agent are determined according to the properties of the soil in each stratum.

[0033] 2. The components of the solidifying agent, including cement, mineral powder, fly ash, slag reducer, anhydrous sodium sulfate and water, are arranged separately and connected to the mixing barrel 10, the mixing barrel is connected to the spouting pipe, the spouting pipe is arranged in the mixing rod and extends to the bottom of the mixing rod.

[0034] 3. During the drilling of the mixing rod in the stratum, the controller identifies the properties of the soil in the drilled stratum according to the drilling depth of the drill rod, and according to the properties of the soil and the component formula, the controller places the components of the solidifying agent in the mixing barrel 10, the components in the mixing barrel 10 are mixed to form the solidifying agent, and the solidifying agent is sprayed from the bottom of the drill rod through the spouting pipe and mixed with the soil in the stratum.

[0035] The construction method for adjusting the proportion of components of a solidifying agent according to the properties of soil layers, by drilling a survey hole before construction to identify the depth of each stratum in the construction site and the properties of the soil in the stratum, determining the water-cement ratio and component formula of the solidifying agent according to the properties of the soil in each stratum, arranging the cement, mineral powder, fly ash, slag reducer, anhydrous sodium sulfate and water separately and connecting them to the mixing barrel 10, the mixing barrel 10 is also connected to the spouting pipe, the spouting pipe is drilled into the stratum synchronously with the mixing rod, the controller can monitor the drilling depth of the mixing rod and identify the pre-set component formula corresponding to the stratum soil at the drilling depth, according to the component formula, the cement, mineral powder, fly ash, slag reducer, anhydrous sodium sulfate and water enter the mixing barrel 10 in the set proportion for mixing, forming a solidifying agent that matches the stratum soil at the drilling depth, and the solidifying agent is sprayed from the bottom of the drill rod through the spouting pipe and mixed with the soil in the stratum. In this way, the construction cost is effectively controlled, the solidification quality is guaranteed, the expected reinforcement effect is achieved, and the purpose of reducing cost and increasing benefit is achieved.

[0036] The controller includes a drill rod depth sensor for observing the drilling depth in real time, a material level sensor placed in each independently placed material storage barrel 20, a flow sensor for detecting the flow of the material in the pipeline 30, a control platform such as a PLC (Programmable Logic Controller) and a DCS (Distributed Control System) for receiving the signals of the various sensors and processing, identifying the corresponding preset formula according to the set depth, controlling the pumping of the material in the multiple storage barrels 20 into the mixing barrel 10 for mixing, and controlling the pumping of the solidifying agent, multiple pipelines 30 and multiple pumps are equipped outside the storage barrels 20 and the mixing barrel 10.

[0037] The operation construction step 3) is repeated until the soil body mixed with the solidifying agent is formed in the soil layer. In this way, the soil body corresponding to various strata is uniformly mixed with the corresponding solidifying agent to form the mixing pile reaching the expected strength, which can be used as a supporting structure, etc.

[0038] In the embodiment, along the arrangement direction from top to bottom of the construction site, the construction site sequentially includes the plain fill soil layer, the silt clay soil layer, the coarse gravelly sand soil layer, the sandy clay soil layer, and the fully weathered mixed granite layer.

[0039] Specifically, when the mixing rod is drilled in the plain fill soil layer, the components of the solidifying agent include 10% to 55% of cement, 20% to 70% of mineral powder, 10% to 20% of fly ash, 10% to 25% of slag reducer, and 2% to 10% of anhydrous calcium sulfate according to the mass components;

[0040] The water-cement ratio of the solidifying agent is 0.5 to 2, and the incorporation ratio of the solidifying agent drilled in the soil layer is ≥5%.

[0041] Specifically, when the mixing rod is drilled in the silt clay soil layer, the components of the solidifying agent include 15% to 75% of cement, 20% to 70% of mineral powder, 10% to 20% of fly ash, 5% to 30% of slag reducer, and 2% to 10% of anhydrous calcium sulfate according to the mass components;

[0042] The water-cement ratio of the solidifying agent is 0.5 to 2, and the incorporation ratio of the solidifying agent drilled in the soil layer is ≥5%.

[0043] Specifically, when the mixing rod is drilled in the plain fill soil layer, the components of the solidifying agent include 5% to 55% of cement, 10% to 90% of mineral powder, 10% to 35% of fly ash, 5% to 25% of slag reducer, and 2% to 10% of anhydrous calcium sulfate according to the mass components;

[0044] The water-cement ratio of the solidifying agent is 0.5 to 2, and the incorporation ratio of the solidifying agent drilled in the soil layer is ≥3%

[0045] Specifically, when the stirring rod is drilled in the sandy clay soil layer, the components of the solidifying agent include 5-55% cement, 10-90% mineral powder, 10-35% fly ash, 5-25% slag reducer, and 2-10% anhydrous sodium sulfate by mass fraction;

[0046] The water-cement ratio of the solidifying agent is 0.5-2, and the mixing ratio of the solidifying agent in the soil layer is ≥3%.

[0047] Specifically, when the stirring rod is drilled in the fully weathered mixed granite soil layer, the components of the solidifying agent include 5-55% cement, 10-90% mineral powder, 15-35% fly ash, 5-25% slag reducer, and 2-10% anhydrous sodium sulfate by mass fraction;

[0048] The water-cement ratio of the solidifying agent is 0.5-2, and the mixing ratio of the solidifying agent in the soil layer is ≥3%.

[0049] Solidification principle:

[0050] Slag and fly ash are the most commonly used industrial by-products in building materials, and are widely used in soil solidifying agents due to their good pozzolanic activity. However, the activity of slag and fly ash needs to be activated in a specific environment, and without other alkaline activators, its hydration speed in water is very slow. When slag and fly ash are mixed with cement in a solution environment, cement will be hydrated first due to its own characteristics, generating calcium silicate hydrate (C-S-H) and calcium hydroxide (Ca(OH)2) 。 As the cement hydration reaction continues, the generated products gradually increase, causing the solution pH value to rise. The Ca(OH)2 produced first can act as an alkaline activator, accelerating the activation of the activity of the slag and fly ash itself, so that the slag and fly ash continuously undergo depolymerization-polymerization reactions to generate C-(A)-S-H and other products. At this point, two kinds of gels, C-(A)-S-H and C-S-H, coexist in the entire solution environment, which is used to fill the pores in the matrix, thereby continuously refining and densifying the structure, which is also the mechanism of using soil solidifying agent to reinforce soft soil.

[0051] The foregoing is a single alkali activation system with Ca(OH)2 as the main alkaline activator, and the generated cementitious material hydration products are mainly C-(A)-S-H gel and C4AH 13 When anhydrous sodium sulfate (Na2SO4) is added, a Na2SO4-Ca(OH)2 composite alkali activation system is formed, and the C4AH 13 and AFm-like phases in the hydration products contain SO4 2-Reaction also generates calcium aluminate (AFt), further compacting the solid structure, increasing its strength. It can be seen that when anhydrous sodium sulfate is present, slag and fly ash particles dissolve faster than in a single alkali-activated system, resulting in faster generation of early hydration products. The early hydration products generated form a layer of product around the slag and fly ash particles, consisting of C-(A)-S-H gel and AFt, thereby increasing the early strength of the solidified body. At the same time, since slag and fly ash are both low-calcium high-silicon aluminum phase materials, if alkali slag is continuously added, it not only supplements the calcium source in the solution environment, but also increases the alkalinity of the entire environment, and the alkali slag also has a filling effect, which is more conducive to improving the strength of the solidified body.

[0052] The cement, mineral powder, fly ash, slag reducer, and anhydrous sodium sulfate are respectively stored in the storage barrels 20, and the water is communicated with the stirring barrel 10 through the water pipe 40; the stirring barrel 10 has a longitudinally arranged stirring cavity 100, and the bottom of the stirring cavity 100 has a plurality of water inlets 101 which are arranged at intervals around the center of the stirring cavity 100;

[0053] The water inlet 101 extends upwardly to have a water inlet pipe 110, the water inlet pipe 110 is arranged longitudinally, the top of the water inlet pipe 110 has a top injection hole 111, and the sidewall of the water inlet pipe 110 has a plurality of side injection holes 112; the stirring cavity 100 is provided with a rotating cylinder 120 which is located in the surrounding area of the plurality of water inlet pipes 110; the rotating cylinder 120 has a cylinder cavity 121 in the center, and the sidewall of the rotating cylinder 120 has a plurality of rotary injection holes 122 which are arranged at intervals along the circumference of the rotating cylinder 120;

[0054] In the construction step 3), according to the soil characteristics and the component formula, the controller controls the components in the plurality of storage barrels 20 to fall into the cylinder cavity 121, and the rotating cylinder 120 rotates synchronously, so that the components falling into the cylinder cavity 121 are sprayed through the rotary injection holes 122 into the stirring cavity 100; at the same time, the water enters the plurality of water inlet pipes 110 and is sprayed through the top injection hole 111 and the plurality of side injection holes 112 into the stirring cavity 100, and is mixed and stirred with the components sprayed out, to form a solidifying agent. In this way, the water and the components sprayed out can be quickly and uniformly stirred and compacted, greatly improving the stirring efficiency and making the components uniform and compact, thereby improving the construction efficiency.

[0055] In the present embodiment, the center of the bottom of the cylinder cavity 121 has an air inlet 102, and when the rotating cylinder 120 rotates, the air inlet 102 injects high-pressure gas from bottom to top into the cavity, disperses the components in the cavity, and drives the components to blow towards the rotary injection holes 122 of the rotating cylinder 120. In this way, the pneumatic stirring promotes the uniform mixing of the materials.

[0056] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A curing construction method that adjusts the proportions of each component of the curing agent according to the properties of the soil layer, characterized in that, The construction steps include the following: 1) Before carrying out the mixing pile construction, conduct exploration drilling to identify the layout depth of each stratum of the construction site and the soil characteristics in the stratum. Based on the soil characteristics in each stratum, determine the water-cement ratio and component formula of the curing agent. 2) The components of the curing agent include cement, mineral powder, fly ash, alkali slag, sodium sulfate and water. The cement, mineral powder, fly ash, alkali slag, sodium sulfate and water are arranged independently and connected to the mixing tank. The mixing tank is connected to a spray pipe. The spray pipe is placed in the mixing rod and extends to the bottom of the mixing rod. 3) During the drilling process of the mixing rod in the formation, the controller identifies the soil characteristics of the drilled soil layer according to the drilling depth of the drill rod; according to the soil characteristics and component formula, the controller places the components of the curing agent into the mixing tank, and the components in the mixing tank are mixed and stirred to form the curing agent; the curing agent is sprayed out from the bottom of the drill rod through the grouting pipe and mixed with the soil in the soil layer. The cement, mineral powder, fly ash, alkali slag, and sodium sulfate are stored independently in storage tanks, and the water is connected to the mixing tank through a water pipe; the mixing tank has a longitudinally arranged mixing chamber, and the bottom of the mixing chamber has multiple water inlets, which are arranged at intervals around the center of the mixing chamber. The water inlet extends upwards with a water inlet pipe, which is arranged longitudinally. The top of the water inlet pipe has a top spray hole, and the side wall of the water inlet pipe has multiple side spray holes. The stirring chamber is equipped with a rotating cylinder, which is located in the area surrounded by multiple water inlet pipes. The rotating cylinder has a cylindrical cavity, and the side wall of the rotating cylinder has multiple swirling spray holes, which are arranged at intervals along the circumference of the rotating cylinder. In construction step 3), based on the soil characteristics and component formula, the controller controls the components in multiple storage tanks to fall into the cylinder cavity. The rotating cylinder rotates synchronously, spraying the components falling into the cylinder cavity into the mixing chamber through the spray nozzles. At the same time, the water enters multiple water inlet pipes and is sprayed into the mixing chamber through the top spray nozzle and multiple side spray nozzles, where it mixes and stirs with the sprayed components to form a curing agent.

2. The construction method for curing according to claim 1, which adjusts the proportions of each component of the curing agent based on the properties of the soil layer, is characterized in that... Repeat the construction step 3) until a mixing pile is formed in the soil layer, which is a mixture of soil and curing agent.

3. The construction method for curing according to claim 1, which adjusts the proportions of each component of the curing agent based on the properties of the soil layer, is characterized in that... Along the top-to-bottom layout of the construction site, the construction site sequentially includes a layer of plain fill soil, a layer of silty clay soil, a layer of coarse gravelly sand, a layer of sandy cohesive soil, and a layer of completely weathered mixed granite.

4. The construction method for curing according to claim 3, which adjusts the proportions of each component of the curing agent based on the properties of the soil layer, is characterized in that... During the drilling process of the stirring rod in the plain fill soil layer, the components of the curing agent, according to the mass composition, include 10% to 55% cement, 20% to 70% mineral powder, 10% to 20% fly ash, 10% to 25% alkali slag and 2% to 10% sodium sulfate. The water-cement ratio of the curing agent is 0.5 to 2, and the incorporation ratio of the curing agent into the soil layer is ≥5%.

5. The construction method for curing according to claim 3, which adjusts the proportions of each component of the curing agent based on the properties of the soil layer, is characterized in that... During the drilling process of the stirring rod in the silty clay layer, the curing agent comprises, by mass, 15% to 75% cement, 20% to 70% mineral powder, 10% to 20% fly ash, 5% to 30% alkali slag, and 2% to 10% sodium sulfate. The water-cement ratio of the curing agent is 0.5 to 2, and the mixing ratio of the curing agent in the soil layer is ≥5%.

6. The construction method for curing according to claim 3, which adjusts the proportions of each component of the curing agent based on the properties of the soil layer, is characterized in that... During the drilling process of the stirring rod in the coarse gravelly sand layer, the curing agent comprises, by mass, 5% to 55% cement, 10% to 90% mineral powder, 10% to 35% fly ash, 5% to 25% alkali slag, and 2% to 10% sodium sulfate. The water-cement ratio of the curing agent is 0.5 to 2, and the incorporation ratio of the curing agent into the soil layer is ≥3%.

7. The construction method for curing according to claim 3, which adjusts the proportions of each component of the curing agent based on the properties of the soil layer, is characterized in that... During the drilling process of the stirring rod in the sandy cohesive soil layer, the curing agent comprises, by mass, 5% to 55% cement, 10% to 90% mineral powder, 10% to 35% fly ash, 5% to 25% alkali slag and 2% to 10% sodium sulfate. The water-cement ratio of the curing agent is 0.5 to 2, and the mixing ratio of the curing agent in the soil layer is ≥3%.

8. The construction method for curing according to claim 3, which adjusts the proportions of each component of the curing agent based on the properties of the soil layer, is characterized in that... During the drilling process of the stirring rod in the fully weathered mixed granite soil layer, the components of the curing agent, by mass composition, include 5% to 55% cement, 10% to 90% mineral powder, 15% to 35% fly ash, 5% to 25% alkali slag and 2% to 10% sodium sulfate. The water-cement ratio of the curing agent is 0.5 to 2, and the mixing ratio of the curing agent in the soil layer is ≥3%.

9. The construction method for curing according to any one of claims 1 to 8, wherein the proportions of the curing agent components are adjusted based on the soil properties, is characterized in that... The bottom center of the cylinder cavity has an air inlet. When the rotating cylinder is rotating, the air inlet injects high-pressure gas from bottom to top into the cavity, which disperses the components in the cavity and drives the components to be blown toward the swirl nozzle of the rotating cylinder.

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