Intelligent reinforcement mixing pile machine for gas-melting type frozen soil foundation

Abstract

The intelligent reinforcement mixing pile machine for the gas melting type frozen soil foundation comprises a bidirectional mixing pile machine, a saturated steam system and a recovery system, the saturated steam system comprises a gas storage tank, a high-temperature steam tank, an air compressor and a water pump, the air compressor is connected with the gas storage tank through a pipeline, the water pump is connected with the high-temperature steam tank, a heater is arranged in the high-temperature steam tank, a high-pressure high-temperature gas conveying pipe is arranged at the top of the high-temperature steam tank, and a high-pressure gas conveying pipe is arranged on the gas storage tank; the recovery system comprises a water storage tank, a vacuum pump and a vacuumizing conveying pipe; a feeding port and a discharging port are formed in a drill rod of the bidirectional mixing pile machine, the high-pressure gas conveying pipe is connected with the feeding port, and the vacuumizing conveying pipe is connected with the discharging port. The saturated steam system can be used for spraying air to the drill hole during drilling of the pile machine, so that ice water in the drill hole is melted, the soil layer structure is convenient to change, the melted ice water can be recycled for the second time through the recycling system, and water resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of frozen soil foundation treatment, in particular to an air-thawing frozen soil foundation intelligent reinforcement mixing pile machine. Background Art

[0002] Seasonal frozen ground in my country is primarily distributed in North China, Northwest China, and Northeast China. As latitude and altitude increase, winter temperatures drop, and the thickness of seasonal frozen ground increases. Seasonal frozen ground poses a threat to buildings through frost heave and thaw settlement. Frost heave occurs for two reasons: When water freezes into ice, its volume increases by 9%. Also, when soil freezes, moisture in the surrounding unfrozen areas accumulates in the frozen surface, increasing the moisture content of the frozen soil. The frozen ice crystals continue to grow, causing the soil to expand and bulge.

[0003] Frost heave of frozen soil can cause the roadbed to bulge, flexible pavement to bulge and crack, and rigid pavement to misalign or break; frost heave can also lift up buildings built on it, causing them to crack, tilt, or even collapse.

[0004] Freeze-thaw can also cause buildings, bridges, and culverts to sink significantly or unevenly, leading to cracks and damage. Therefore, both frost heave and freeze-thaw of seasonally frozen soil can pose a threat to engineering projects, requiring careful attention and the implementation of necessary protective measures.

[0005] There are two common methods for treating frozen soil:

[0006] (1) Maintaining frozen: This is a design method that always keeps the foundation in a frozen state. Generally speaking, when the thickness of the frozen soil is large and the soil temperature is relatively stable, or the frozen soil is hard and has a large thawing collapse, it is more reasonable to adopt the method of maintaining frozen. Especially for the foundation of power transmission lines, if measures can be taken to ensure that the temperature of the frozen soil around the foundation is not higher than the natural state, the design can be carried out according to the method of maintaining frozen.

[0007] A design that remains frozen should be used in one of the following situations:

[0008] a) Permafrost ground with an average annual ground temperature below -1°C;

[0009] b) The foundation soil within the bearing layer is in a hard frozen state;

[0010] c) Within the maximum melting depth range, there are foundations with thawing settlement, severe thawing settlement, thawing-sinking soil and their interlayers.

[0011] The following methods are usually used: 1. Pile foundation method; 2. Cushion method; 3. Ventilation foundation method; 4. Heat pipe foundation method; 5. Artificial freezing method.

[0012] (2) Allowing for thawing: Using the land that is thawing or has just thawed as the foundation. The soil layer with a high bearing capacity for thawing is shallower. For small, discontinuous island-shaped frozen soil with a small thawing amount, it is more reasonable to adopt the principle of allowing thawing. In particular, for structures with good upper structure stiffness or insensitive to uneven settlement, the principle of allowing thawing should be adopted for design. When the estimated thawing amount exceeds the allowable deformation value of the foundation, artificial pre-thawing can also be adopted to melt the frozen soil before building the foundation. Alternatively, the foundation can be appropriately reinforced (such as replacing soil with low melting capacity). When designing according to the principle of allowing thawing, the strength of the foundation (including the bearing layer and the underlying layer) must be measured. When determining the bearing capacity value of the foundation, the physical and mechanical properties used should try to simulate the actual stress state of the foundation in the future. In addition to strength verification, the deformation of the foundation must also be calculated. The calculation method and allowable deformation value of the foundation deformation are the same as those of general natural foundations. Only the compressibility index needs to be replaced with the deformation property index of the thawing soil or thawed soil to take the thawing deformation into account.

[0013] Through a large number of engineering practices, it was found that the traditional methods did not remove the moisture in the frozen soil, diseases still existed, and the construction cost was high. Utility Model Content

[0014] The technical problem to be solved by the utility model is that the conventional method does not remove the moisture in the frozen soil and has a high cost. An air-thawing frozen soil foundation intelligent reinforcement mixing pile machine is proposed to solve the above problem.

[0015] The technical problem to be solved by the utility model is achieved through the following technical solutions: an air-thawing frozen soil foundation intelligent reinforcement mixing pile machine, comprising a bidirectional mixing pile machine having a chassis and an intelligent control cabinet arranged on the chassis, a mast, a power head and a drill rod, the drill rod being mounted on the power head, and further comprising a saturated steam system and a recovery system;

[0016] The saturated steam system includes a gas storage tank, a high-temperature water vapor tank, an air compressor and a water pump. The air compressor is connected to the gas storage tank through a pipeline. The gas storage tank is connected to the bottom of the high-temperature water vapor tank through a pipeline. The water pump is connected to the high-temperature water vapor tank. A heater is provided in the high-temperature water vapor tank. A high-pressure high-temperature gas delivery pipe is provided on the top of the high-temperature water vapor tank. A high-pressure gas delivery pipe is provided on the gas storage tank, and the high-pressure gas delivery pipe is connected to the high-pressure high-temperature gas delivery pipe.

[0017] The recovery system includes a water storage tank, a vacuum pump and a vacuum delivery pipe. The end of the vacuum delivery pipe is connected to the water storage tank through the vacuum pump, and the bottom of the water storage tank is connected to the water pump through a pipe. A backflush pipe is provided between the vacuum delivery pipe and the gas storage tank.

[0018] A feed port and a discharge port are provided on the drill rod of the bidirectional mixing pile machine. A high-pressure gas delivery pipe is connected to the feed port, and a vacuum delivery pipe is connected to the discharge port.

[0019] Preferably, a saturated steam tank is further included, one end of the high-pressure and high-temperature gas delivery pipe is connected to the drill rod feed port of the bidirectional mixing pile driver, and the other end is connected to the top of the saturated steam tank.

[0020] Preferably, a pressure sensor and a temperature sensor are installed on the high-temperature water vapor tank and the saturated steam tank.

[0021] Preferably, a pneumatic valve I is provided at the air inlet end of the vacuum pump, a pneumatic valve II is provided on the pipe between the vacuum pump and the water storage tank, an air-water separator is provided on the pipe between the pneumatic valve II and the vacuum pump, a pneumatic valve III is provided on the pipe between the water storage tank and the water pump, an external water source pipe is provided on the pipe between the pneumatic valve III and the water pump, a pneumatic valve IV is provided on the external water source pipe, a pneumatic valve V is provided on the pipe between the high-temperature water vapor tank and the gas tank, a pneumatic valve VI is provided on the end where the high-pressure and high-temperature gas delivery pipe is connected to the high-temperature water vapor tank, a pneumatic valve VII is provided on the high-pressure gas delivery pipe, a pneumatic valve VIII is provided on the pipe between the water pump and the high-temperature water vapor tank, and a pneumatic valve IX is provided on the backblowing pipe.

[0022] Preferably, the drill rod of the bidirectional mixing pile driver comprises an inner drill rod and an outer drill rod sleeved on the outer circumference of the inner drill rod;

[0023] The top end of the inner drill rod is in transmission cooperation with the power head arranged on the top of the bidirectional mixing pile driver, and the bottom end of the inner drill rod extends out of the outer drill rod. The outer peripheral surface of the inner drill rod extending out of the outer drill rod is provided with an inner drill rod stirring blade. A feeding channel is reserved in the middle of the inner drill rod. One end of the feeding channel is connected to the feeding port, and the other end is arranged close to the inner drill rod stirring blade to form a spray hole.

[0024] The top end of the outer drill rod is connected to the power head arranged on the top of the bidirectional mixing pile driver through a reversing bevel gear transmission, so that the rotation direction of the outer drill rod is opposite to that of the inner drill rod. An outer drill rod stirring blade is arranged on the outer peripheral surface of the bottom of the outer drill rod, and the space between the inner peripheral surface of the inner drill rod and the outer peripheral surface of the outer drill rod forms a discharge channel. One end of the discharge channel is connected to the discharge port, and the other end is arranged close to the outer drill rod stirring blade to form a suction hole.

[0025] Preferably, a PTC electric heating plate is installed on the inner drill rod stirring blade.

[0026] Preferably, a filter screen is installed at the suction hole of the outer drill rod.

[0027] Preferably, an exhaust valve is provided on the top of the water storage tank.

[0028] Compared with the prior art, the beneficial technical effects of the present invention are:

[0029] (1) The saturated steam system can be used to spray air into the borehole during the drilling of the pile driver, thereby melting the ice water in the borehole, which is convenient for changing the soil structure. The melted ice water can be reused through the recovery system, saving water resources and solving the problem of water shortage in construction areas.

[0030] (2) A filter is installed at the suction hole of the outer drill rod to prevent large particles of soil from entering the vacuum conveying pipe and causing unnecessary blockage. The filter can be backflushed regularly through the backflush pipe to wash away the soil particles adsorbed on the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the pile driver, saturated steam system and recovery system of the utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the saturated steam system and recovery system of the utility model;

[0033] Figure 3 The inner drill rod and the outer drill rod of the pile driver of the utility model;

[0034] Figure 4 This is a construction diagram of the utility model;

[0035] Figure 5 This is a schematic diagram of the utility model of the pneumatic dynamic soil foundation reinforcement monitoring and management system.

[0036] In the figure, 1. chassis; 2. intelligent control cabinet; 3. mast; 4. power head; 5. gas storage tank; 6. high-temperature water vapor tank; 7. air compressor; 8. water pump; 9. heater; 10. high-pressure high-temperature gas delivery pipe; 11. high-pressure gas delivery pipe; 12. water storage tank; 13. vacuum pump; 14. vacuum delivery pipe; 15. blowback pipe; 16. exhaust valve; 17. feed port; 18. discharge port; 19. pneumatic valve Ⅰ; 20. Pneumatic valve Ⅱ; 21. Air-water separator; 22. Pneumatic valve Ⅲ; 23. External water source pipeline; 24. Pneumatic valve Ⅳ; 25. Pneumatic valve Ⅴ; 26. Pneumatic valve Ⅵ; 27. Pneumatic valve Ⅶ; 28. Pneumatic valve VIII; 29. ​​Pneumatic valve IX; 30. Inner drill rod; 31. Outer drill rod; 32. Inner drill rod stirring blade; 33. Spray hole; 34. Outer drill rod stirring blade; 35. Suction hole; 36. Electric heating plate. DETAILED DESCRIPTION

[0037] The following further describes the specific technical solutions of the present invention with reference to the accompanying drawings, so as to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to their rights.

[0038] Example 1, reference Figure 1-4An intelligent piling machine for reinforcing frozen soil foundations using air-thaw technology includes a bidirectional piling machine having a chassis 1, an intelligent control cabinet 2 disposed on the chassis 1, a mast 3, a power head 4, and a drill rod, wherein the drill rod is mounted on the power head 4, and further includes a saturated steam system and a recovery system.

[0039] The saturated steam system includes a gas storage tank 5, a high-temperature water vapor tank 6, an air compressor 7 and a water pump 8. The air compressor 7 is connected to the gas storage tank 5 through a pipeline. The gas storage tank 5 is connected to the bottom of the high-temperature water vapor tank 6 through a pipeline. Pressure sensors and temperature sensors are installed on the high-temperature water vapor tank 6 and the saturated steam tank. The models and specifications of the pressure sensors and temperature sensors can be selected according to the use requirements. The water pump 8 is connected to the high-temperature water vapor tank 6. A heater 9 is provided in the high-temperature water vapor tank 6. The heater 9 can be an electric heater. A high-pressure and high-temperature gas delivery pipe 10 is provided on the top of the high-temperature water vapor tank 6. A high-pressure gas delivery pipe 11 is provided on the gas storage tank 5. The high-pressure gas delivery pipe 11 is connected to the high-pressure and high-temperature gas delivery pipe 10. Saturated steam can be supplied to the drill pipe through the saturated steam system.

[0040] The recovery system includes a water storage tank 12, a vacuum pump 13 and a vacuum delivery pipe 14. The end of the vacuum delivery pipe 14 is connected to the water storage tank 12 through the vacuum pump 13. The bottom of the water storage tank 12 is connected to the water pump 8 through a pipeline. A backflush pipe 15 is provided between the vacuum delivery pipe 14 and the gas storage tank 5. An exhaust valve 16 is provided at the top of the water storage tank 12. This recovery system can store the melted ice water and deliver it to the high-temperature water vapor tank 6 for secondary reuse, thereby minimizing the loss of water resources.

[0041] The drill rod of the bidirectional mixing pile driver is provided with a feed port 17 and a discharge port 18, a high-pressure gas delivery pipe 11 is connected to the feed port 17, and a vacuum delivery pipe 14 is connected to the discharge port 18;

[0042] A pneumatic valve I19 is provided at the air inlet end of the vacuum pump 13, a pneumatic valve II20 is provided on the pipeline between the vacuum pump 13 and the water storage tank 12, an air-water separator 21 is provided on the pipeline between the pneumatic valve II20 and the vacuum pump 13, a pneumatic valve III22 is provided on the pipeline between the water storage tank 12 and the water pump 8, an external water source pipeline 23 is provided on the pipeline between the pneumatic valve III22 and the water pump 8, a pneumatic valve IV24 is provided on the external water source pipeline, a pneumatic valve V25 is provided on the pipeline between the high-temperature water vapor tank 6 and the gas tank 5, a pneumatic valve VI26 is provided on the end where the high-pressure and high-temperature gas delivery pipe 10 is connected to the high-temperature water vapor tank 6, a pneumatic valve VII27 is provided on the high-pressure gas delivery pipe 11, a pneumatic valve VIII28 is provided on the pipeline between the water pump 8 and the high-temperature water vapor tank 6, and a pneumatic valve IX29 is provided on the backblowing pipe 15.

[0043] Example 2: The gas-thawing frozen soil foundation intelligent reinforcement mixing pile driver described in Example 1 further includes a saturated steam tank (not shown in the figure), and one end of the high-pressure and high-temperature gas transmission pipe 10 is connected to the drill rod feed port 17 of the bidirectional mixing pile driver, and the other end is connected to the top of the saturated steam tank.

[0044] In Example 2, we consider the need for better control of the temperature of saturated steam by adding a saturated steam tank. When the saturated steam reaches a predetermined temperature, the gas supply is started. The temperature of the saturated steam can be increased when the drilling speed decreases, and vice versa.

[0045] Embodiment 3, the air-thawing frozen soil foundation intelligent reinforcement mixing pile machine described in embodiment 1 or 2, the drill rod of the two-way mixing pile machine includes an inner drill rod 30 and an outer drill rod 31 sleeved on the outer circumference of the inner drill rod 30; the top end of the inner drill rod 30 is matched with the power head 4 set on the top of the two-way mixing pile machine, the bottom end of the inner drill rod 30 extends out of the outer drill rod 31, and the outer circumference of the inner drill rod 30 extending out of the outer drill rod 31 is provided with an inner drill rod stirring blade 32, and a feeding channel is reserved in the middle of the inner drill rod 30, one end of the feeding channel is connected to the said feeding port 17, and the other end is close to the inner drill rod stirring blade 32 and forms a spray hole 33; the top end of the outer drill rod 31 is connected to the power head 4 set on the top of the two-way mixing pile machine through a reversing bevel gear transmission, so that the outer The rotation direction of the drill rod 31 is opposite to that of the inner drill rod 30. An outer drill rod stirring blade 34 is provided on the outer peripheral surface of the bottom of the outer drill rod 31. The space between the inner peripheral surface of the inner drill rod 30 and the outer peripheral surface of the outer drill rod 31 forms a discharge channel. One end of the discharge channel is connected to the discharge port 18, and the other end is provided near the outer drill rod stirring blade 34 and forms a suction hole 35. A PTC electric heating plate 36 is installed on the inner drill rod stirring blade 32. Its temperature can be controlled at 300-500℃, and the number of PTC electric heating plates 36 installed can be selected according to usage requirements. In addition, the temperature of the electric heating plate can be automatically adjusted according to the freezing degree of the frozen soil. For example, when the drilling speed is reduced, the temperature of the electric heating plate can be increased. The specific temperature value can be adjusted according to usage requirements.

[0046] In order to prevent large particles of soil from entering the vacuum conveying pipe 14 and causing unnecessary blockage, a filter can be installed at the suction hole 35 of the outer drill rod 31.

[0047] Specifically, when drilling, saturated steam is intermittently sprayed into the borehole through the spray hole 33. The time interval of the intermittent spraying of saturated steam is 3-5s, the saturated steam temperature is 140-170°C, the saturated steam spraying pressure is 0.4-0.8Mpa, the saturated steam temperature is inversely proportional to the drilling speed, and the drilling speed is 0.2-0.5m / min. The steam is stirred while spraying, and the ice water formed after melting is sucked through the suction hole 35. During this period, the suction hole 35 is backflushed by high-pressure gas. In addition, when drilling, the degree of dissolution of frozen soil reflects the magnitude of the current value during drilling. The drilling speed is automatically controlled according to the magnitude of the current value. That is, when the current value of the motor used by the bidirectional mixing pile driver to drive the drill rod for drilling is greater than 35A, the drilling speed of the drill rod is reduced until the motor current value returns to the normal current value, and the drilling speed can be restored. The normal current value is 35A.

[0048] When the drill is lifted, high-pressure gas is sprayed into the drill hole from the spray hole 33. The time interval of the intermittent spraying of high-pressure gas is 2-4s, and the pressure of the high-pressure gas spraying is 0.4-0.7Mpa. Stirring is carried out while spraying. During this period, the suction hole 35 is kept to suck ice water, and high-pressure gas is used for backwashing.

[0049] When drilling down and lifting the drill, ice water suction and backflushing are performed alternately, with an alternating interval of 40-60s.

[0050] 1. The working principle is as follows:

[0051] Click the start button of the intelligent control cabinet, the pneumatic valve IV24 and the pneumatic valve VIII28 are opened, and the water pump 8 is turned on to supply water. When the water in the high-temperature water tank reaches the set weight value, the water pump 8 is automatically closed. At the same time, the pneumatic valve IV24 and the pneumatic valve VIII28 are closed (when the weight of the water is lower than the set value of 30kg, the water pump 8 automatically replenishes water). At the same time, the heater 109 in the high-temperature water tank, that is, the electric heater 10, starts to work. When the water temperature reaches the set value (measured by the temperature sensor), the electric heater 109 stops working (when the water temperature is lower than the set value of 2°C, the electric heater 109 automatically starts to maintain the set value of the water temperature); the air compressor 7 starts automatically. When the pressure value of the air storage tank 5 reaches the set value, the air compressor 7 stops working (when the air pressure is lower than the set value of 0.1Mpa, the air compressor 7 automatically starts to maintain the set value of the air pressure); the pneumatic valve V25 is opened, and the high-pressure air enters the high-temperature water tank. The PTC (positive temperature coefficient thermistor) electric heating plate on the electric heating drill bit starts to work (based on the data of different frozen soil layers in the geological survey data, the temperature of the PTC electric heating plate is set at 300-500℃ by the thermostat in the intelligent control cabinet). When the PTC electric heating plate reaches the set temperature, the inner drill rod 30 is started first, followed by the outer drill rod 31, rotating in both forward and reverse directions, starting the transmission system, and the electric heating drill bit begins to drill. When it enters the soil, the pneumatic valve VI26 opens, and the high-pressure, high-temperature water vapor enters the inner drill rod 30 through the high-pressure, high-temperature gas transmission pipe 10 and is sprayed out from the spray hole 33 on the inner drill rod 30. At this time, the frozen soil begins to dissolve under the combined action of the high temperature of the PTC electric heating plate and the high-pressure, high-temperature water vapor. The degree of dissolution can be reflected by the current value during drilling. The drilling speed is generally controlled at 0.2-0.4m / min. When the current value is too large during the drilling process, the transmission system automatically reduces the drilling speed to meet the melting of the frozen soil. The high-pressure and high-temperature water vapor is ejected in a pulsed manner. The interval time is based on the degree of melting of the frozen soil and is generally controlled at 3-5 seconds. At this time, the vacuum pump 13 is started, and the pneumatic valve I 19 is opened. The water and water vapor generated by the melting of the frozen soil are sucked into the gas-water separator through the suction hole 35 set on the outer drill rod 31, the channel between the inner and outer drill rods 31, the water and gas pumping device, and the vacuum conveying pipe 14. The pneumatic valve II 20 is opened, the gas-water separator separates the gas, and the sucked water enters the water storage tank 12; when the soil particles after the frozen soil melts are adsorbed to the suction hole 35 on the outer drill rod 31 during the vacuum process, the pneumatic valve I 19 is closed, and the pneumatic valve IX 29 is opened, and the high-pressure air blows away the soil particles adsorbed in the suction hole 35 on the outer drill rod 31. The vacuuming and blowing work alternately. According to the adsorption of soil particles, the alternating working time is generally set between 40 and 60 seconds; after the drilling reaches the designed depth, the transmission system reverses and starts to lift. The pneumatic valve VI 26 is closed and the pneumatic valve VII 27 is opened. At this time, only high-pressure gas is ejected through the spray hole 33 of the inner drill pipe 30. The purpose is to reduce the water content in the frozen soil (when drilling, high-pressure and high-temperature water vapor is sprayed. At this time, the high-pressure gas contains a certain amount of water, which is conducive to dissolving the frozen soil. When the frozen soil is melted, it is not suitable to spray water). The high-pressure gas injected at this time also adopts a pulsed operation. The general interval time is set to 2-4 seconds, which is shorter than the pulse interval time when drilling. A part of the gas volume is increased to facilitate the dissolution of the dissolved frozen soil during vacuuming. The water in the soil is removed. During construction, weight sensors installed on the high-temperature water vapor tank and water storage tank 12 measure the amount of water injected and sucked out. The difference in volume is compared with geological survey data to determine the effectiveness of frozen soil reinforcement. When the amount of water stored in water storage tank 12 reaches the set upper limit, pneumatic valve IV 24 closes, pneumatic valve III 22 opens, and water pump 8 transfers the water from water storage tank 12 to the high-temperature water vapor tank, achieving environmental protection and energy conservation. (Frozen soil is generally found in high-altitude areas where water resources are relatively scarce.)

[0052] 2. Monitoring and management system (refer to Figure 5 ):

[0053] The equipment consists of the following parts: on-site inspection, on-site monitoring management, and monitoring center;

[0054] (1) When Internet terminal devices such as mobile phones, tablets, PCs, platform monitoring centers, and on-site inspection equipment obtain data, they dispatch the server to the application server, and the application server reads the data directly from the cache database, which can greatly reduce the reading pressure of the database server and return data results more quickly.

[0055] (2) Since the module transmits data once every 1-3 seconds, the number is large and the data volume is huge; we write the collected real-time data into files and store them in the attachment server. If conditions permit, multiple attachment servers can be clustered; the files stored in the attachment server contain the pile driving process data of all pile drivers, so in the application system, this stored data can be called to simulate the dynamic process of the original operation.

[0056] (3) The data page display platform integrates a camera video monitoring system, and the video stream data is broadcast online to display the construction site conditions in real time. At the same time, after the data transmitted from the Internet of Things module is collected, the websocket technology is integrated and synchronized to each terminal device in real time to dynamically display the progress of the construction work.

[0057] (4) The on-site monitoring management and monitoring center automatically generates on-site original construction records and statistical tables based on the received on-site construction parameters, eliminating human factors, ensuring the authenticity of the data, and significantly reducing labor costs.

[0058] (5) For completed loose soil reinforcement foundations, if there are any disputes after testing, the construction process can be replayed to find out the problem.

[0059] (6) For irregular operations and special circumstances on site, instructions can be sent to the control cabinet of the intelligent reinforcement mixing pile machine for aerosol-thawed frozen soil foundation to terminate on-site construction and reduce losses.

Claims

1. An intelligent aerosol-thaw frozen soil foundation reinforcement mixing pile driver, including a bidirectional mixing pile driver, characterized by: Also includes saturated steam system and recovery system; The saturated steam system includes a gas storage tank, a high-temperature water vapor tank, an air compressor and a water pump. The air compressor is connected to the gas storage tank through a pipeline. The gas storage tank is connected to the bottom of the high-temperature water vapor tank through a pipeline. The water pump is connected to the high-temperature water vapor tank. A heater is provided in the high-temperature water vapor tank. A high-pressure high-temperature gas delivery pipe is provided on the top of the high-temperature water vapor tank. A high-pressure gas delivery pipe is provided on the gas storage tank, and the high-pressure gas delivery pipe is connected to the high-pressure high-temperature gas delivery pipe. The recovery system includes a water storage tank, a vacuum pump and a vacuum delivery pipe. The end of the vacuum delivery pipe is connected to the water storage tank through the vacuum pump, and the bottom of the water storage tank is connected to the water pump through a pipe. A backflush pipe is provided between the vacuum delivery pipe and the gas storage tank. A feed port and a discharge port are provided on the drill rod of the bidirectional mixing pile machine. A high-pressure gas delivery pipe is connected to the feed port, and a vacuum delivery pipe is connected to the discharge port.

2. The intelligent piling machine for reinforcing frozen soil foundations according to claim 1 is characterized by: It also includes a saturated steam tank. One end of the high-pressure and high-temperature gas delivery pipe is connected to the drill rod feed port of the two-way mixing pile driver, and the other end is connected to the top of the saturated steam tank.

3. The intelligent piling machine for reinforcing frozen soil foundations according to claim 2 is characterized by: Pressure sensors and temperature sensors are installed on the high-temperature water vapor tank and the saturated steam tank.

4. The aerosol-thaw type intelligent reinforced mixing pile machine for frozen soil foundation according to claim 1 or 2, characterized in that: A pneumatic valve I is provided at the air inlet end of the vacuum pump, a pneumatic valve II is provided on the pipe between the vacuum pump and the water storage tank, an air-water separator is provided on the pipe between the pneumatic valve II and the vacuum pump, a pneumatic valve III is provided on the pipe between the water storage tank and the water pump, an external water source pipe is provided on the pipe between the pneumatic valve III and the water pump, a pneumatic valve IV is provided on the external water source pipe, a pneumatic valve V is provided on the pipe between the high-temperature water vapor tank and the gas tank, a pneumatic valve VI is provided on the end where the high-pressure and high-temperature gas delivery pipe is connected to the high-temperature water vapor tank, a pneumatic valve VII is provided on the high-pressure gas delivery pipe, a pneumatic valve VIII is provided on the pipe between the water pump and the high-temperature water vapor tank, and a pneumatic valve IX is provided on the backblowing pipe.

5. The aerosol-thaw type intelligent reinforced mixing pile machine for frozen soil foundation according to claim 1 or 2, characterized in that: The drill rod of the bidirectional mixing pile driver includes an inner drill rod and an outer drill rod sleeved on the outer circumference of the inner drill rod; The top end of the inner drill rod is in transmission cooperation with the power head arranged on the top of the bidirectional mixing pile driver, and the bottom end of the inner drill rod extends out of the outer drill rod. The outer peripheral surface of the inner drill rod extending out of the outer drill rod is provided with an inner drill rod stirring blade. A feeding channel is reserved in the middle of the inner drill rod. One end of the feeding channel is connected to the feeding port, and the other end is arranged close to the inner drill rod stirring blade to form a spray hole. The top end of the outer drill rod is connected to the power head arranged on the top of the bidirectional mixing pile driver through a reversing bevel gear transmission, so that the rotation direction of the outer drill rod is opposite to that of the inner drill rod. An outer drill rod stirring blade is arranged on the outer peripheral surface of the bottom of the outer drill rod, and the space between the inner peripheral surface of the inner drill rod and the outer peripheral surface of the outer drill rod forms a discharge channel. One end of the discharge channel is connected to the discharge port, and the other end is arranged close to the outer drill rod stirring blade to form a suction hole.

6. The intelligent piling machine for reinforcing frozen soil foundations according to claim 5 is characterized by: A PTC electric heating plate is installed on the inner drill rod stirring blade.

7. The aerosol-type intelligent reinforced mixing pile driver for frozen soil foundation according to claim 5, characterized in that: A filter is installed at the suction hole of the outer drill rod.

8. The intelligent piling machine for reinforcing frozen soil foundations according to claim 1 is characterized by: An exhaust valve is provided on the top of the water storage tank.

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