WO2024027851A1 - 一种螺旋铰吸式加气轻质水泥土mjs装置及其施工方法 - Google Patents

一种螺旋铰吸式加气轻质水泥土mjs装置及其施工方法 Download PDF

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Publication number
WO2024027851A1
WO2024027851A1 PCT/CN2023/121179 CN2023121179W WO2024027851A1 WO 2024027851 A1 WO2024027851 A1 WO 2024027851A1 CN 2023121179 W CN2023121179 W CN 2023121179W WO 2024027851 A1 WO2024027851 A1 WO 2024027851A1
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WIPO (PCT)
Prior art keywords
pressure
soil
pipe
cement slurry
cement
Prior art date
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PCT/CN2023/121179
Other languages
English (en)
French (fr)
Inventor
章丽莎
魏骁
杨仲轩
崔允亮
王新泉
刘福深
赵朝发
Original Assignee
浙大城市学院
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Publication date
Application filed by 浙大城市学院 filed Critical 浙大城市学院
Priority to PCT/CN2023/121179 priority Critical patent/WO2024027851A1/zh
Priority to JP2023579279A priority patent/JP7568334B2/ja
Priority to US18/399,699 priority patent/US12037763B1/en
Publication of WO2024027851A1 publication Critical patent/WO2024027851A1/zh

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/18—Pipes provided with plural fluid passages
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/003—Drilling with mechanical conveying means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
    • G16Y40/00—IoT characterised by the purpose of the information processing
    • G16Y40/10—Detection; Monitoring
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/003—Injection of material
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0004—Synthetics
    • E02D2300/0018—Cement used as binder
    • E02D2300/0023—Slurry
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure

Definitions

  • the invention relates to the technical field of foundation reinforcement, and in particular to a spiral hinge suction aerated lightweight cement soil MJS device and its construction method.
  • the common three-axis mixing reinforcement method in foundation reinforcement can easily produce a certain lateral pressure on the soil around the reinforcement area.
  • the density of cement and soil in the reinforcement area increases, which will generate additional vertical stress in the foundation, thereby causing foundation settlement, possibly It causes pipeline rupture, road surface subsidence and foundation displacement of surrounding buildings.
  • the present invention provides a spiral hinge suction aerated light cement soil MJS device and a construction method thereof.
  • the present invention provides a spiral reamer suction type aerated light cement soil MJS device, including a porous tube, a spiral belt conveyor device, an outer sleeve, an integrated device, a reamer head, a pressure monitoring system, a quality measuring instrument and a control device.
  • Platform the pressure monitoring system includes a pressure sensor and a collection instrument;
  • the porous tube, integrated device and reamer head are connected from top to bottom, and an outer sleeve is installed on the outside of the porous tube to form the main body of the drill pipe;
  • the porous pipe integrates high-pressure cement slurry pipe, backup pipe, negative pressure air pipe, hydraulic pipe, negative pressure water pipe, main air pipe, pressure sensor line pipe, pressure water pipe, reserve air pipe and power line pipe;
  • the top of the outer sleeve is provided with a mud outlet, and the mud outlet is connected to the waste liquid tank;
  • the spiral belt conveying device includes an axial spiral conveying belt and an electric device; the spiral belt conveying device is arranged between the porous tube and the outer sleeve, the inlet is arranged at one end near the integrated device, and the outlet is connected with the mud outlet; Electric units are used to drive shaft-type spiral conveyor belts;
  • the outer side of the barrel wall of the integrated device is provided with a high-pressure water spray port, a pressure sensor and a high-pressure grouting port from top to bottom;
  • the reamer head is located at the bottom of the integrated device and is connected through the mud discharge channel inside the integrated device;
  • a motor device is provided in the integrated device to drive the reamer head to rotate and cut the soil independently, so as to avoid disturbing the surrounding soil due to the overall rotation of the drill pipe to collect soil during the lifting process;
  • the integrated device is also provided with an earth discharge channel.
  • the earth discharge channel has an entrance near the reamer head.
  • a gravel crusher is provided at the entrance.
  • the outlet is connected to the entrance of the spiral belt conveyor and is connected to the earth discharge channel.
  • a mud discharge pressure chamber valve is installed at the outlet, allowing the crushed soil to enter the spiral belt conveyor from the soil discharge channel, and is used to discharge the soil-water mixture formed after high-pressure water cutting, as well as the excess cement slurry after high-pressure grouting;
  • the main air pipe is connected to the high-pressure grouting port;
  • the negative pressure air pipe, negative pressure water pipe, and reserve air pipe all form pipelines equipped with pressure control valves in the integrated device, and are connected to the soil discharge channel to assist in mud discharge and soil excavation;
  • the hydraulic pipe forms two branches equipped with pressure control valves in the integrated device, which are respectively connected to the mud discharge pressure chamber valve and motor device;
  • the pressure water pipe forms two branches equipped with pressure control valves in the integrated device, respectively connecting the high-pressure water spray port on the barrel wall of the integrated device and the pressure water outlet on the top of the reamer head;
  • the high-pressure cement slurry pipe is divided into an aerated cement slurry pipe and a lightweight cement slurry pipe, which are connected to the high-pressure grouting port of the integrated device; when using the aerated cement slurry pipe, the main air pipe branches out branch air pipes and is connected to the aerated cement slurry pipe.
  • the cement slurry pipe is used to pump up cement and soil; when using the lightweight cement slurry pipe, the lightweight cement slurry in the cement slurry bin contains a foaming agent;
  • the power line pipe is used for power supply; the high-pressure water spray port cuts the soil through high-pressure water; the mud discharge port is used to discharge the soil-water mixture formed after high-pressure water cutting, and the excess cement slurry after high-pressure grouting;
  • the pressure control valve is connected to the console through the wire in the pressure sensor line pipe, adjusts the air pressure in the branch air pipe according to the water and soil pressure data, and controls the gas to enter the cement slurry of the high-pressure cement slurry pipe;
  • the mass measuring instrument is installed in the waste liquid tank, measures the quality of the soil-water mixture pumped from the mud pipe to the waste liquid tank, and transmits the measurement data to the console;
  • the pressure sensor is connected to the collector through wires in the pressure sensor line pipe, and the collector is connected to the console; the console is used to regulate the cooperative control operations of each pressure control valve and control the motor.
  • the upper end of the aerated cement slurry pipe is connected to the cement slurry silo, and the cement slurry used is mixed with an accelerating setting agent.
  • the aerated cement slurry pipe is connected in the integrated device through a number of branch air pipes equipped with pressure control valves. Main air pipe, the aerated cement slurry pipe is connected with the branch air pipe and after gas is injected, it penetrates into the main air pipe at the high-pressure grouting port to form a coaxial double-layer pipe structure connected to the high-pressure grouting port.
  • the pressure control valve is connected to the console through a wire in the pressure sensor line pipe, adjusts the air pressure in the branch air pipe according to the water and soil pressure data collected by the pressure sensor, and controls the gas to enter the cement slurry of the high-pressure cement slurry pipe.
  • the diameter of the branch gas pipe is determined by the gas flux to be injected into the high-pressure cement slurry pipe; the diameter of the high-pressure cement slurry pipe in the coaxial double-layer pipe structure connected to the high-pressure grouting port is smaller than the main gas pipe.
  • the lightweight cement slurry in the cement slurry bin contains a foaming agent.
  • the foaming agent is divided into a first type of foaming agent and a second type of foaming agent. agent;
  • the first type of foaming agent is a surface-active foaming agent
  • the second type of foaming agent is composed of aluminum powder, iron powder, pulling powder and air-entraining agent, mixed in a ratio of 9:9:1:1; the foaming agent is used to generate closed bubbles in cement slurry ; The air-entraining agent increases the number of bubbles and makes them uniform; the second type of foaming agent can also be adjusted in proportion according to indoor tests and field tests to adapt to more engineering scenarios.
  • the amount of the foaming agent added to the cement slurry silo is adjusted in real time based on the water and soil pressure data collected by the pressure sensor. It is required that the volume of the light cement soil is the same as the volume of the discharged soil-water mixture.
  • the gap is determined by the gradation of the excavated crushed soil particles, and is used to reduce the amount of crushed soil loss and the amount of crushed soil caused by the broken soil.
  • the stuck problem; the inclination angle of the spiral belt conveyor is determined by the friction between the discharged soil and the conveyor belt, and it is necessary to ensure that most of the soil particles and mud can be transported out.
  • the reserve air pipe contains pressurized gas, which can be used to pressurize and clean holes when the pipeline is blocked; the upper end of the main air pipe is connected to an air compressor; the negative pressure air pipe, negative pressure water pipe, hydraulic pipe, pressure water pipe and reserve air pipe.
  • the pressure control valve, pressure sensor, and pressure control valve of the tracheal branch are powered by the power cord in the power line pipe, and are all connected to the console through the wires in the pressure sensor line pipe.
  • the console is connected to the porous pipe, integrated device, pressure monitoring system and quality measuring instrument to control the drilling operations, high-pressure water soil cutting operations, high-pressure grouting reinforcement operations,
  • the mud discharge operation and various pressure control valves coordinate the control operation.
  • the motor device is connected to the branch circuit of the hydraulic pipe and the power line in the power line tube, and the control wire of the motor device passes through the pressure sensor line tube and is connected to the console.
  • the motor device drives the reamer head to rotate at high speed, and the reamer
  • the gravel crusher pulverizes the gravel in the mixture to be extracted; the cut soil and the pressure water outlet spray pressure water to form a soil-water mixture, and the crushed soil
  • the gravel is discharged together through the soil discharge channel, the mud discharge pressure chamber valve, and the spiral belt conveyor; according to the monitoring data of groundwater level changes, the groundwater is recharged by injecting pressure water to keep the groundwater level unchanged;
  • the pressure sensor transmits the water and soil pressure data to the console through the acquisition instrument.
  • the opening and closing degree of the mud discharge pressure bin valve is adjusted through the console to control the discharge of high-pressure cement slurry and high-pressure water to ensure the safety of the reinforcement area. Water and soil pressure remain constant;
  • the quality of the cement slurry should be tested to ensure that the grouting reinforcement requirements are met; the drill pipe is rotated and lifted by the top power device, and the rotation and lifting speed should ensure that the earth discharge channel will contain a large amount of soil mud. Extract and ensure that the grouted aerated cement soil can fully replace the original soil in the reinforcement area, satisfy the gravity equivalent of the strata before and after reinforcement construction, and at the same time improve the soil strength in the reinforcement area.
  • the spiral belt conveyor in the present invention is connected to the negative pressure device.
  • the soil-water mixture and gravel are pumped to the axial spiral conveyor through the soil discharge channel, and then physical friction is used to mechanically remove the soil-water mixture and gravel.
  • the soil particles and cement are directly extracted through negative pressure, which reduces resource consumption and is in line with the concept of green environmental protection.
  • the spiral belt conveyor device is equipped with a separate electric device and operates separately from the porous tube to prevent the porous tube from rotating too fast and centrifugally splashing mud on the axial spiral conveyor belt, making it difficult to transport it out, thus reducing the efficiency of soil discharge.
  • the invention is provided with two types of high-pressure cement slurry pipes.
  • branch air pipes branch out from the main air pipe to continuously add air to the high-pressure cement slurry pipes, which can quickly wrap the gas to form closed bubbles, ensuring The gas can be evenly distributed in the cement liquid, and the strength at different locations in the reinforcement area is basically the same, preventing uneven bubbles from causing fracture. It effectively prevents ground settlement caused by additional stress caused by the increase in density of the reinforced area after grouting, and may harm surrounding buildings. It fundamentally reduces and eliminates the hazards of soil settlement and deformation caused by traditional foundation reinforcement methods. It is especially suitable for construction Dense Construction conditions in the area.
  • the aerated cement slurry pipe and the main air pipe form a coaxial double-layer casing structure, wrapping high-pressure gas around the high-pressure sprayed cement, standardizing the cement spray range, so that the foundation is reinforced into a regular shape, and its reliability and controllability are improved. .
  • foamed lightweight cement When using lightweight cement slurry pipes, use foamed lightweight cement for reinforcement.
  • the cement slurry and foaming agent are fully mixed evenly in the mud silo so that the foaming agent has sufficient time to foam in the cement slurry to form a foam with stable and uniform bubbles.
  • Lightweight cement slurry ensures the stable quality of foamed lightweight cement slurry.
  • the reamer head is tapered, and the reamer blade on the reamer head is a serrated blade.
  • the soil is discharged while cutting, and the reamer head is independently connected to the electric device, which improves the efficiency of cutting and transporting soil. Efficiency, saving construction period.
  • An earth discharge channel is provided in the present invention. When soil particles and mud are transported, they are extracted through the earth discharge channel. This not only prevents the broken soil from causing damage to other pipelines in the integrated device due to collision, but also prevents a large amount of soil from accumulating in the integrated device and causing blockage.
  • the gravel crusher in the present invention pulverizes the gravel in the coarse-grained soil into powder to avoid clogging the soil discharge channel with gravel discharged from the soil discharge channel.
  • the crushed gravel can be pumped out under a low negative pressure.
  • a mass measuring instrument is used in the present invention to achieve a balance between the amount of discharged soil and the quality of the injected aerated cement, ensuring that the self-weight stress of the stratum in the reinforcement area is equivalent to the balance of water and soil pressure, thereby ensuring the self-weight of the stratum in the reinforcement area.
  • Stress equivalence avoids settlement due to local density increase after reinforcement, reduces disturbance to the surrounding environment during construction, and is safe and reliable.
  • Figure 1 is a side view of the spiral hinge suction aerated cement soil MJS device of the present invention
  • Figure 2 is a cross-sectional view along line A-A in Figure 1;
  • Figure 3 is a cross-sectional view of the spiral belt conveyor
  • Figure 4 is a schematic diagram of the grouting conduit unit.
  • the embodiment of the present invention provides a spiral reamer suction aerated light cement soil MJS device, including a porous tube 1, a spiral belt conveyor 2, an outer sleeve 3, an integrated device 4, and a reamer head.
  • Pressure monitoring system, quality measuring instrument and console the pressure monitoring system includes a pressure sensor 6 and a collecting instrument; the porous tube, the integrated device and the reamer head are connected from top to bottom, and a The outer sleeve constitutes the main body of the drill pipe;
  • the porous pipe 1 integrates a high-pressure cement slurry pipe 1-1, a backup pipe 1-2, a negative pressure air pipe 1-3, a hydraulic pipe 1-4, a negative pressure water pipe 1-5, and a main air pipe 1- 6.
  • the top of the outer sleeve 3 is provided with a mud outlet 10, and the mud outlet 10 is connected to the waste liquid tank;
  • the spiral belt conveyor 2 includes an axial spiral conveyor belt and an electric device; the spiral belt conveyor 2 is arranged between the porous tube 1 and the outer sleeve 3; the spiral belt conveyor 2
  • the inlet is set near the integrated device 4, and the outlet is connected with the mud outlet 10; an electric device is set near the top area of the spiral belt conveyor 2 so that the axial spiral conveyor belt can transport soil alone to avoid affecting the rotary spraying of the porous pipe 1 grouting reinforcement;
  • the outer side of the cylinder wall of the integrated device 4 is provided with a high-pressure water spray port 5, a pressure sensor 6 and a high-pressure grouting port 7 from top to bottom;
  • the reamer head 8 is composed of a reamer bit 8-1 and a reamer ring 8-2; the reamer bit 8-1 and the reamer ring 8-2 are fixedly connected, and the serrated reamer blade 8-1- 1 is fixedly connected to the reamer bit 8-1; the reamer head 8 is located at the bottom of the integrated device 4 and is connected through the mud discharge channel inside the integrated device 4;
  • a motor device is provided near the bottom area of the integrated device 4 to drive the reamer head 8 to rotate and cut the soil independently to avoid disturbing the surrounding soil by rotating the drill pipe as a whole to retrieve soil;
  • the integrated device 4 is also provided with an earth discharging channel.
  • the earth discharging channel has an entrance near the reamer head 8.
  • a gravel crusher is provided at the entrance to crush the gravel in the crushed soil particles.
  • the earth discharging channel has an outlet. It is connected to the spiral belt conveyor 2, and a mud discharge pressure chamber valve is set at the outlet of the soil discharge channel, so that the crushed soil enters the spiral belt conveyor 2 from the soil discharge channel, and is used to discharge the soil-water formed after high-pressure water cutting. mixture, and excess cement slurry after high-pressure grouting;
  • the negative pressure air pipes 1-3, negative pressure water pipes 1-5, and reserve air pipes 1-9 all form pipelines equipped with pressure control valves in the integrated device 4, and are connected to the soil discharge channel to assist in mud discharge and soil excavation;
  • the hydraulic pipes 1-4 form two branches equipped with pressure control valves in the integrated device 4, which are respectively connected to the mud discharge pressure chamber valve and motor device;
  • the pressure water pipes 1-8 form two branches equipped with pressure control valves in the integrated device 4, respectively connecting the high-pressure water spray port 5 on the wall of the integrated device 4 and the pressure water outlet on the top of the reamer head 8;
  • the pressure water outlet at the top of the reamer head 8 sprays pressure water.
  • it can be used to reduce drag and cool down the soil when the reamer head 8 is cutting the soil. At the same time, it can facilitate the discharge of the soil-water mixture from the soil discharge channel.
  • it can be used for Balance the amount of groundwater discharged through the drainage channel to ensure that the groundwater level remains unchanged and prevent ground subsidence caused by the decline of groundwater;
  • the high-pressure grouting ports 7 are arranged in pairs, and each high-pressure grouting port 7 is equipped with a grouting conduit unit;
  • the grouting conduit unit consists of a high-pressure cement slurry pipe 1-1, a main air pipe 1-6, and a branch air pipe 1- 6-1 and a pressure control valve 9;
  • the branch air pipe 1-6-1 branches out from the main air pipe 1-6 in the integrated device 4, and is connected to the high-pressure cement slurry pipe 1-1 through the pressure control valve 9; so
  • the pressure control valve 9 is used to control the pressure of the gas injected into the high-pressure cement slurry pipe 1-1 from the branch air pipe 1-6-1;
  • the high-pressure cement slurry pipe 1-1 is connected with the branch gas pipe 1-6-1. After gas is injected, it penetrates into the main gas pipe 1-6 near the high-pressure grouting port 7 to form a connected high-pressure grouting pipe.
  • the coaxial double-layer pipe structure of port 7; the pressure control valve 9 is connected to the console through the wires in the pressure sensor line pipe 1-7, adjusts the air pressure in the branch air pipe 1-6-1 according to the water and soil pressure data, and controls the entry of gas In the cement slurry of the high-pressure cement slurry pipe 1-1, the bubbles in the soil in the reinforcement area are evenly distributed and the pore content is stable;
  • the pressure sensor 6 is connected to the collector through the wires in the pressure sensor pipes 1-7, and transmits the real-time collected water and soil pressure data to the collector; the collector is connected to the console; if the collector monitors When the water and soil pressure is abnormal, the console will adjust the opening and closing degree of the mud discharge pressure chamber valve to control the discharged high-pressure cement slurry and high-pressure water to ensure that the water and soil pressure in the reinforcement area remains constant;
  • the mass measuring instrument is installed in the waste liquid tank, measures the quality of the soil-water mixture pumped to the waste liquid tank by the spiral belt conveyor 2, transmits the measurement data to the console, and adjusts and controls the pouring of cement into the reinforcement area through the console.
  • the quality of the slurry makes the self-weight stress of the stratum equal before and after construction in the reinforcement area.
  • the distance is set to ensure that the spiral belt conveyor 2 is in contact with the porous tube 1 and the outer sleeve 3 during operation. There is no friction between them, and it is also necessary to ensure that the amount of broken soil is small; the inclination angle set by the spiral belt conveyor 2 must ensure that most of the soil particles and mud can be transported out;
  • the plurality of porous pipes 1 can be extended by bolting; the upper end of the high-pressure cement slurry pipe 1-1 is connected to a cement slurry silo; the cement slurry of the high-pressure cement slurry pipe 1-1 should be mixed with quick-setting
  • the agent after injecting gas through the branch trachea 1-6-1, can quickly wrap the gas to form a closed bubble; the upper end of the pressure water pipe 1-8 is connected to a pressure water tank; the preparatory trachea 1-9 contains pressure gas, which can be used for pipelines When clogged, pressurize the hole; the upper end of the main air pipe 1-6 is connected to an air compressor; the negative pressure air pipe 1-3, negative pressure water pipe 1-5, hydraulic pipe 1-4, pressure water pipe 1-8 and reserve air pipe
  • the pressure control valve, pressure sensor 6, and pressure control valve 9 of branch 1-9 are powered by the power cord in the power conduit 1-10, and are all connected to the console through the wires in the pressure sensor conduit 1-7;
  • the integrated device 4 is provided with at least a pair of high-pressure grouting ports 7; the diameter of the branch gas pipe 1-6-1 is determined by the gas flux to be injected into the high-pressure cement slurry pipe 1-1; the connected high-pressure grouting The diameter of the high-pressure cement slurry pipe 1-1 in the coaxial double-layer pipe structure of port 7 is smaller than the main air pipe 1-6;
  • the motor device is connected to the branch of the hydraulic pipe 1-4 and the power line in the power line pipe 1-10, and the control wire of the motor device passes through the pressure sensor line pipe 1-7 and is connected to the console.
  • console is connected to the porous pipe 1, the integrated device 4, the pressure monitoring system and the quality measuring instrument to control the drilling operations, high-pressure water soil cutting operations, and high-pressure grouting reinforcement of the spiral suction air-cement soil MJS device. operation, mud discharge operation and various pressure control valves to coordinately control the operation.
  • the maximum diameter of the integrated device 4 is the same as the diameter of the outer sleeve 3; the maximum outer diameter of the reamer head 8 should be larger than the outer diameters of the outer sleeve 3 and the integrated device 4;
  • embodiments of the present invention also provide a construction method using aerated mud paddle pipes, which method includes the following steps:
  • Step 1 Position and set out the line, set up groundwater level and ground subsidence monitoring points in the area to be reinforced, and conduct real-time monitoring of groundwater level and ground subsidence;
  • Step 2 After connecting the various pipelines of the spiral hinge-suction aerated cement-soil MJS device, start the drilling system of the spiral hinge-suction aerated cement-soil MJS device through the console to perform drilling operations: the motor device drives the hinge The cutter head 8 rotates at high speed, the reamer bit 8-1 and the reamer blade 8-1-1 thereon cut the soil, and at the same time, the gravel crusher crushes the gravel in the mixture to be extracted; the cut soil and the pressure output Pressure water is sprayed out from the nozzle to form a soil-water mixture, which is discharged together with the crushed gravel through the soil discharge channel, the mud discharge pressure bin valve, and the spiral belt conveyor 2; according to the monitoring data of groundwater level changes, the groundwater is replenished by injecting pressure water. Keep water levels constant;
  • Step 3 After drilling to the designed depth, close the motor device, pressure outlet, and mud discharge pressure chamber valve, and stop drilling operations;
  • Step 4 Through the console, start the high-pressure water soil cutting and high-pressure cement slurry grouting reinforcement system of the spiral hinge suction aerated cement-soil MJS device: After high-pressure water is sprayed through the high-pressure water spray port 5 to cut the soil, Grouting port 7 sprays high-pressure cement slurry for grouting reinforcement; the drill pipe rotates and lifts at a certain speed, and high-pressure water jet port 5 and high-pressure grouting port 7 continue to perform high-pressure water cutting of soil and high-pressure grouting reinforcement operations respectively;
  • the pressure sensor 6 transmits the water and soil pressure data to the console through the acquisition instrument.
  • the opening and closing degree of the mud discharge pressure bin valve is adjusted through the console to control the discharged high-pressure cement slurry and high-pressure water to ensure the reinforcement area.
  • the water and soil pressure remains constant;
  • the pressure control valve 9 is controlled through the console, so that the pressure gas in the branch air pipe 1-6-1 is injected into the cement slurry in the high-pressure cement slurry pipe 1-1 to form aerated cement slurry with evenly distributed bubbles. Then, the high-pressure grouting port 7 sprays out grouting reinforcement; the quality of the soil-water mixture and gravel is measured by a mass measuring instrument, and the measurement data is transmitted to the console, and the cement slurry is poured into the reinforcement area through the console adjustment control The quality of the reinforcement area makes the self-weight stress of the stratum equivalent before and after construction in the reinforcement area;
  • Step 5 After the grouting reinforcement of the soil is completed, close the spiral hinge-suction aerated cement-soil MJS device and disconnect the pipelines of the spiral hinge-suction aerated cement-soil MJS device;
  • Step 6 Repeat the above steps until all grouting reinforcement construction in the area to be reinforced is completed
  • the quality of the cement slurry should be tested to ensure that it meets the requirements for grouting reinforcement; the drill pipe is rotated and lifted through the top power device, and the rotation and lifting speed should ensure that the earth discharge channel can extract mud containing a large amount of soil, and ensure that the aerated cement soil for grouting is It can fully replace the original soil in the reinforcement area, meet the equivalence of stratum gravity before and after reinforcement construction, and at the same time improve the soil strength in the reinforcement area.
  • step 5 the pressure gas in the cement slurry injected into the high-pressure cement slurry pipe 1-1 from the branch air pipe 1-6-1 should be adjusted in real time according to the grouting reinforcement depth to ensure that the bubbles in the reinforced soil at different depths are evenly distributed and The pore content is stable; the quality of the cement slurry poured into the reinforcement area should be equal to the quality of the natural soil discharged from the drainage channel; in step 6, the quality of the grouting-reinforced soil should be tested by the method specified in the specification.
  • a spiral reamer suction MJS device for light cement and soil reinforcement including a porous pipe 1, a spiral belt conveyor device 2, an outer sleeve 3, an integrated device 4, a reamer head 8, a pressure monitoring system, a quality measuring instrument and Console;
  • the pressure monitoring system includes a pressure sensor 6 and a collection instrument;
  • the porous pipe 1 integrates a high-pressure cement slurry pipe 1-1, a backup pipe 1-2, a negative pressure air pipe 1-3, a hydraulic pipe 1-4, a negative pressure water pipe 1-5, a main air pipe 1-6, and a pressure sensor line pipe. 1-7, pressure water pipes 1-8, prepared air pipes 1-9, power cord pipes 1-10;
  • the spiral belt conveying device 2 includes an axial spiral conveying belt and an electric device; the spiral belt conveying device 2 is arranged between the porous tube 1 and the outer sleeve 3; the inlet of the spiral belt conveying device 2 and the mud discharge pressure The valve is connected, and the outlet is connected with the mud outlet 10; an electric device is provided in the top area of the spiral belt conveyor 2 to connect the axial spiral conveyor belt to transport the soil separately to avoid affecting the rotary jet grouting reinforcement of the porous pipe 1;
  • the mud outlet 10 is provided on the top of the outer sleeve 3 and is connected to the external waste liquid tank;
  • the outer side of the cylinder wall of the integrated device 4 is provided with a high-pressure water spray port 5, a pressure sensor 6 and a high-pressure grouting port 7 from top to bottom.
  • the reamer head 8 is composed of a reamer bit 8-1 and a reamer ring 8-2; the reamer bit 8-1 and the reamer ring 8-2 are fixedly connected, and the serrated reamer blade 8-1- 1 is fixedly connected to the reamer bit 8-1; the reamer
  • the cutter head 8 is located at the bottom of the integrated device 4 and is connected through the mud discharge channel inside the integrated device 4;
  • a motor device is provided near the bottom area of the integrated device 4, which is separately connected to the reamer head 8, and only drives the reamer head 8 to rotate and cut the soil, so as to avoid disturbing the surrounding soil by affecting the overall rotation of the drill pipe to retrieve soil;
  • the integrated device 4 is also provided with an earth discharging channel.
  • a gravel crusher is provided near the reamer head 8 of the earth discharging channel to crush the gravel in the crushed soil particles.
  • the outlet of the earth discharging channel is connected with the spiral belt conveyor.
  • Device 2 is connected, and a mud discharge pressure chamber valve is set at the outlet of the soil discharge channel to control the speed of crushed soil entering the spiral belt conveyor device 2 from the soil discharge channel;
  • the negative pressure air pipes 1-3, negative pressure water pipes 1-5, and reserve air pipes 1-9 are all equipped with pressure control valves in the integrated device 4, and are connected to the soil discharge channel to assist in mud discharge and soil excavation;
  • the hydraulic pipes 1-4 form two branches equipped with pressure control valves in the integrated device 4, which are respectively connected to the mud discharge pressure chamber valve and motor device;
  • the pressure water pipes 1-8 form two branches equipped with pressure control valves in the integrated device 4, connecting the high-pressure water spray port 5 on the wall of the integrated device 4 and the pressure outlet on the top of the reamer head 8; the reamer
  • the pressure water outlet at the top of the cutter head 8 sprays pressure water.
  • it can be used to reduce drag and cool down the soil when the reamer head 8 cuts the soil.
  • it can be used to balance the amount of groundwater discharged through the drainage channel to ensure that the groundwater is discharged. The position line remains unchanged to prevent ground subsidence caused by the decline of groundwater;
  • the high-pressure water spray port 5 sprays out high-pressure water to cut the soil; the soil discharge channel is used to discharge the soil-water mixture formed after high-pressure water cutting, and the excess cement slurry after high-pressure grouting; the high-pressure grouting port 7. High-pressure cement slurry further cuts the soil and strengthens it;
  • the pressure sensor 6 is connected to the collector through the wires in the pressure sensor pipes 1-7, and transmits the real-time collected water and soil pressure data to the collector; the collector is connected to the console; if the collector detects abnormal water and soil pressure , the console will adjust the opening and closing degree of the mud discharge pressure bin valve to control the discharged high-pressure cement slurry and high-pressure water to ensure that the water and soil pressure in the reinforcement area remains constant;
  • the mass measuring instrument is installed in the waste liquid tank, measures the quality of the soil-water mixture pumped to the waste liquid tank by the spiral belt conveyor 2, transmits the measurement data to the console, and adjusts and controls the pouring of cement into the reinforcement area through the console.
  • the quality of the slurry makes the self-weight stress of the stratum equal before and after construction in the reinforcement area.
  • An electric device is provided in the spiral belt conveyor 2 to enable the axial spiral conveyor belt to operate independently to avoid
  • the porous pipe 1 rotates at a high speed during jet grouting, and the gravel or soil-water mixture on the shaft spiral conveyor belt will splash centrifugally, causing damage to the outer sleeve 3 due to collision;
  • the plurality of porous pipes 1 can be extended by bolts; the upper end of the high-pressure cement slurry pipe 1-1 is connected to a cement slurry silo; the prepared air pipes 1-9 contain pressurized gas, which can be used to pressurize and clear the pipeline when it is clogged. hole; the upper end of the pressure water pipe 1-8 is connected to a pressure water tank; the upper end of the main air pipe 1-6 is connected to an air compressor; the backup pipe 1-2, negative pressure air pipe 1-3, hydraulic pipe 1-4, negative pressure
  • the pressure control valves and pressure sensors 6 of the water pipes 1-5, pressure water pipes 1-8, and the reserve air pipe 1-9 branches are powered by the power cords in the power line pipes 1-10, and are all supplied through the pressure sensor line pipes 1-7.
  • the wires are connected to the console.
  • the foaming agent is divided into a first type of foaming agent and a second type of foaming agent; the first type of foaming agent is a surface-active foaming agent, and the bubbles generated by the foaming agent should meet the following requirements :
  • the bubbles should be uniform and fine, with a bubble density of 48kg/m 3 ⁇ 52kg/m 3 ;
  • the settlement height of a standard bubble column in 1 hour is not greater than 6mm;
  • the bleeding volume of a standard bubble column is no more than 20ml in 1 hour;
  • the increase rate of wet bulk weight determined by defoaming test should not exceed 10%.
  • the surface-active foaming agent is directly supplied by the manufacturer; the second type of foaming agent is composed of aluminum powder, iron powder, pulling powder and a small amount of air-entraining agent, according to 9: Mix in a ratio of 9:1:1; the foaming agent is used to generate closed bubbles in the cement slurry; the air-entraining agent increases the number of bubbles and makes them uniform; the second type of foaming agent can also be used according to indoor tests Adjust the ratio with field tests to adapt to more engineering scenarios.
  • the amount of the foaming agent added to the cement slurry silo is adjusted in real time according to the water and soil pressure data collected by the pressure sensor 6.
  • the volume of the light cement soil is required to be the same as the volume of the discharged soil-water mixture;
  • the console is connected to the porous pipe 1, the integrated device 4, the pressure monitoring system and the quality measuring instrument, and regulates the drilling operations, high-pressure water cutting operations, and high-pressure grouting reinforcement of the spiral hinge suction MJS device used for lightweight cement and soil reinforcement. operation, mud discharge operation and various pressure control valves to coordinately control the operation.
  • the maximum diameter of the integrated device 4 is the same as the diameter of the outer sleeve 3; the maximum outer diameter of the reamer head 8 should be larger than the outer diameters of the outer sleeve 3 and the integrated device 4;
  • the motor device is connected to the branch of the hydraulic pipe 1-4 and the power line in the power line pipe 1-10.
  • the control wire of the motor device passes through the pressure sensor line pipe 1-7 and is connected to the console.
  • embodiments of the present invention also provide a construction method of a spiral hinge-suction MJS device for lightweight cement-soil reinforcement, which method includes the following steps:
  • High-pressure grouting port 7 sprays high-pressure cement slurry for grouting reinforcement; at the same time, the drill pipe rotates and lifts at a certain speed, and high-pressure water spray port 5 and high-pressure grouting port 7 continue to perform high-pressure water cutting of soil and high-pressure grouting reinforcement operations respectively;
  • the pressure sensor 6 transmits the water and soil pressure data to the console through the acquisition instrument.
  • the opening and closing degree of the valve of the mud discharge pressure bin is adjusted through the console, thereby controlling the amount of discharged high-pressure cement slurry and high-pressure water. Ensure that the water and soil pressure in the reinforced area remains constant;
  • the mass measuring instrument measures the quality of the soil-water mixture, transmits the measurement data to the console, and adjusts and controls the quality of the foam lightweight cement slurry poured into the reinforcement area through the console, so that the self-weight stress of the stratum before and after construction in the reinforcement area is equivalent. ;
  • the quality of the cement slurry should be tested to ensure that it meets the requirements for grouting reinforcement; the drill pipe is rotated and lifted through the top power device, and the rotation and lifting speed should ensure that the earth discharge channel can pump out the mud containing a large amount of soil, and ensure that the foamed light cement for grouting is
  • the soil can fully replace the original soil in the reinforcement area, satisfy the gravity equivalence of the strata before and after reinforcement construction, and at the same time improve the soil strength in the reinforcement area.

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Abstract

一种螺旋铰吸式加气轻质水泥土MJS装置及其施工方法，该装置包括多孔管（1）、外套筒（3）、集成装置（4）、螺旋带输送装置（2）、铰刀头（8）、压力监测系统、质量测定仪和控制台；多孔管（1）集成备用管（1-2）、负压气管（1-3）、液压管（1-4）、负压水管（1-5）、压力传感器线管（1-7）、压力水管（1-8）、预备气管（1-9）、电源线管（1-10）和至少一个注浆导管单元；螺旋带输送装置（2）包括轴式螺旋传输带和电动装置；地基加固施工，铰刀头（8）削切土体并通过碎石机搅碎砾石再进入轴式螺旋传输带运至废液箱，质量测定仪对排出混合物的量进行监测并注入等量的水泥。

Description

一种螺旋铰吸式加气轻质水泥土MJS装置及其施工方法 技术领域
本发明涉及地基加固技术领域，尤其涉及一种螺旋铰吸式加气轻质水泥土MJS装置及其施工方法。
背景技术
随着城市浅层空间开发完善，城市建设用地日趋紧张，为高效利用城市密集建成区域的土地资源，地下空间开发快速推进。在地下空间开发过程中，地基加固技术常被用于保证已建成建构筑物周边的地下工程近接施工的顺利实施。
地基加固中常见的三轴搅拌加固方法，易对加固区域周侧土体产生一定侧压力，同时，加固区域水泥土的密度增加，会在地基中产生竖向附加应力，进而引起地基沉降，可能引发管线破裂、路面下沉以及周边建构筑物基础位移。
因此，为减小和消除传统地基加固方法引起土体沉降变形的危害，促使地基加固施工更加高效、可靠，同时增加地基加固技术的适用条件，亟需一种自钻进式加气水泥土MJS装置。
发明内容
为了克服上述现有技术的不足，本发明提供了一种螺旋铰吸式加气轻质水泥土MJS装置及其施工方法。
本发明解决其技术问题所采用的技术方案是：
本发明一方面提供了一种螺旋铰吸式加气轻质水泥土MJS装置，包括多孔管、螺旋带输送装置、外套筒、集成装置、铰刀头、压力监测系统、质量测定仪和控制台；所述压力监测系统包括压力传感器和采集仪；
所述多孔管、集成装置和铰刀头自上而下连接，所述多孔管外侧安装有外套筒，构成钻杆主体；
所述多孔管集成高压水泥浆管、备用管、负压气管、液压管、负压水管、主气管、压力传感器线管、压力水管、预备气管和电源线管；
所述外套筒顶部设有出泥口，所述出泥口与废液箱连接；
所述螺旋带输送装置包括轴式螺旋传输带和电动装置；所述螺旋带输送装置设置在多孔管与外套筒之间，入口设置在近集成装置一端，出口与出泥口连通；所述电动装置用于驱动轴式螺旋传输带；
所述集成装置的筒壁外侧自上至下设有高压喷水口、压力传感器和高压注浆口；
所述铰刀头位于集成装置底部，通过集成装置内部的排泥通道连通；
所述集成装置内设置电机装置，用于驱动铰刀头单独旋转切削土体，避免提升过程中钻杆整体旋转取土对周围土体产生扰动；
所述集成装置内还设有排土通道，所述排土通道近铰刀头处为入口，在入口处设置碎石机，出口与所述螺旋带输送装置的入口连接，并于排土通道出口处设置排泥压力仓阀门，使得碎土从排土通道进入螺旋带输送装置，并用于排出高压水切削后形成的土—水混合物，以及高压注浆后多余的水泥浆；
所述主气管连接至高压注浆口；所述负压气管、负压水管、预备气管均在集成装置内形成设有压力控制阀门的管路，与排土通道连通后辅助排泥和出土；
所述液压管在集成装置内形成两个设有压力控制阀门的支路，分别连排泥压力仓阀门和电机装置；
所述压力水管在集成装置内形成两个设有压力控制阀门的支路，分别连通集成装置筒壁的高压喷水口和铰刀头顶部的压力出水口；
所述高压水泥浆管分为加气水泥浆管和轻质水泥浆管，连通至集成装置的高压注浆口；使用所述加气水泥浆管时，主气管分出分支气管连通至加气水泥浆管用于水泥土打气；使用所述轻质水泥浆管时，水泥浆仓内的轻质水泥浆含有发泡剂；
所述电源线管用于供电；所述高压喷水口通过高压水切削土体；所述排泥口用于排出高压水切削后形成的土—水混合物，以及高压注浆后多余的水泥浆；
所述压力控制阀门通过压力传感器线管内的导线与控制台连接，根据水土压力数据调节分支气管内气压，控制气体进入高压水泥浆管的水泥浆中；
所述质量测定仪设置在废液箱内，对排泥管抽至废液箱的土—水混合物质量进行测定，将测定数据传输至控制台；
所述压力传感器通过压力传感器线管内的导线与采集仪连接，所述采集仪与控制台连接；所述控制台用于调控各个压力控制阀门协同控制作业和控制电机。
进一步地，所述加气水泥浆管上端连接至水泥浆仓，所使用的水泥浆中掺入速凝剂，加气水泥浆管在集成装置内通过若干设有压力控制阀门的分支气管，连通主气管，所述加气水泥浆管与分支气管连通注入气体后，在高压注浆口处穿入主气管中，形成连通高压注浆口的同轴双层管结构。
进一步地，所述压力控制阀门通过压力传感器线管内的导线与控制台连接，根据压力传感器采集的水土压力数据调节分支气管内气压，控制气体进入高压水泥浆管的水泥浆中。所述分支气管的直径由待注入高压水泥浆管内的气体通量确定；所述连通高压注浆口的同轴双层管结构中的高压水泥浆管直径小于主气管。
进一步地，所述轻质水泥浆管上端连接至水泥浆仓，水泥浆仓内的轻质水泥浆含有发泡剂，所述发泡剂分为第一类发泡剂与第二类发泡剂；
所述第一类发泡剂为表面活性类发泡剂，
所述第二类发泡剂由铝粉、铁粉、拉开粉和引气剂，按9：9：1：1的比例混合；所述发泡剂用于在水泥浆料中产生密闭气泡；所述引气剂使气泡数量增加且均匀；所述第二类发泡剂也可根据室内试验和现场试验进行配比调整以适应更多的工程场景。
进一步地，所述发泡剂加入水泥浆仓的量，根据压力传感器采集的水土压力数据实时调整，要求轻质水泥土的体积与排出土—水混合物的体积相同。
进一步地，所述螺旋带输送装置与所述多孔管以及所述外套筒之间具有空隙，所述空隙由出渣碎土颗粒的级配确定，用于减少碎土流失量和碎土引起的卡壳问题；所述螺旋带输送装置设置的倾斜角度由出渣碎土与传输带的摩擦力确定，需保证土粒与泥浆大部分能够被运出。
进一步地，所述预备气管内为压力气体，可用于管路堵塞时加压清孔；所述主气管上端连接空压机；所述负压气管、负压水管、液压管、压力水管和预备气管支路的压力控制阀门、压力传感器、压力控制阀门通过电源线管内的电源线供电，均经压力传感器线管内的导线与控制台连接。
进一步地，所述控制台连接多孔管、集成装置、压力监测系统和质量测定仪，调控螺旋铰吸式加气水泥土MJS装置的钻孔作业、高压水削土作业、高压注浆加固作业、排泥作业以及各个压力控制阀门协同控制作业。所述电机装置与液压管的支路、电源线管内的电源线连接，电机装置的控制导线穿过压力传感器线管与控制台连接。
另一方面，还提供了一种施工方法，该方法包括以下步骤：
定位放线，在待加固区域内设置地下水位、地面沉降监测点，对地下水位和地面沉降进行实时监测；
将螺旋铰吸式加气水泥土MJS装置的各个管路连接完毕后，通过控制台，启动螺旋铰吸式加气水泥土MJS装置进行钻孔作业；电机装置驱动铰刀头高速旋转，铰刀钻头及其上的铰刀刀片切削土体，同时碎石机将待抽出混合物中的砾石搅碎；切削后的土体与压力出水口喷出压力水形成土—水混合物，和搅碎后的砾石一同经排土通道、排泥压力仓阀门、螺旋带输送装置排出；根据地下水位变化监测数据，通过注入压力水补给地下水，保持地下水位不变；
钻孔至设计深度后，关闭电机装置、压力出水口、排泥压力仓阀门，停止钻孔作业；
通过控制台，启动螺旋铰吸式加气水泥土MJS装置的高压水削土和高压水泥浆注浆加固系统：通过高压喷水口喷射出高压水切削土体后，通过高压注浆口喷射高压水泥浆进行注浆加固；钻杆以一定速度旋转提升，高压喷水口和高压注浆口分别持续进行高压水切削土体和高压注浆加固作业；
在高压水切削土体过程中，压力传感器将水土压力数据经采集仪传输至控制台，通过控制台调整排泥压力仓阀门开合程度，控制排出的高压水泥浆和高压水，保证加固区域的水土压力维持恒定；
在高压注浆过程中，若需要给加气水泥浆管加气，则通过控制台控制压力控制阀门，使得分支气管内的压力气体注入高压水泥浆管的水泥浆中，形成气泡均匀分布的加气水泥浆；由高压注浆口喷射出进行注浆加固；由质量测定仪对土—水混合物和砾石的质量进行测定，将测定数据传输至控制台，通过控制台调整控制灌入加固区域水泥浆的质量，使加固区域施工前后地层自重应力等效；
待土体注浆加固完成后，关闭螺旋铰吸式加气水泥土MJS装置，断开螺旋铰吸式加气水泥土MJS装置各个管路的连接；
重复上述步骤，直至完成待加固区域的所有注浆加固施工。
进一步地，所述高压注浆过程中，应对水泥浆的质量进行检测，保证满足注浆加固要求；钻杆通过顶部动力装置旋转提升，旋转提升速度应保证排土通道将含大量土体的泥浆抽出，并保证注浆的加气水泥土能充分替换加固区域的原状土体，满足加固施工前后地层重力等效的同时提升加固区域的土体强度。
与现有技术相比，本发明的有益效果：
1、本发明中螺旋带输送装置连接负压装置，在集成装置部分通过排土通道将土—水混合物、砾石抽至轴式螺旋传输带，再应用物理摩擦通过机械将土—水混合物、砾石至废液箱，较直接通过负压将土粒、水泥直接抽出，减少资源消耗，符合绿色环保的理念。
2、本发明中螺旋带输送装置单独设置电动装置，与多孔管分开运作，避免多孔管转速太快使轴式螺旋传输带上泥浆离心飞溅，难以被运出，从而降低排土效率。
3、本发明中本发明设置有两种高压水泥浆管，使用加气水泥浆管时，通过主气管分支出分支气管向高压水泥浆管中持续加气，能快速包裹气体形成封闭气泡，保证气体能够在水泥液中均匀分布、加固区域不同位置处的强度基本相同，避免出现部分气泡不均匀导致断裂。有效防止因注浆后加固区域密度增加产生附加应力引起地面沉降，以及可能危害周边建构筑物的情况，从根本上减小和消除传统地基加固方法引起土体沉降变形的危害，特别适用于在建筑密集 区域内施工的情况。
加气水泥浆管与主气管形成同轴双层套管结构，在高压喷出的水泥周围包裹高压气体，规范水泥喷射范围，使得地基加固为规整的形状，其可靠性与可控性均提高。
使用轻质水泥浆管时，采用泡沫轻质水泥加固，水泥浆液与发泡剂在泥浆仓中充分混合均匀，使发泡剂有充足的时间在水泥浆里发泡，形成气泡稳定均匀的泡沫轻质水泥浆，保证泡沫轻质水泥浆的质量稳定。
4、本发明中铰刀头为锥形，铰刀头上铰刀刀片为带锯齿刀片，在进行切削的同时进行排土，且铰刀头与电动装置单独连接，提高切削与运输土体的效率，节约工期。
5、本发明中设置排土通道，在运输土粒与泥浆时通过排土通道抽出，既防止碎土对集成装置中其他管道碰撞产生损坏，又防止大量的土体在集成装置堆积发生堵塞。
6、本发明中碎石机将粗粒土中的砾石搅碎成粉状，避免从排土通道排出有砾石将排土通道堵塞，搅碎的砾石在负压较小的情况下即可抽至螺旋带输送装置，适用于含砾石的环境施工，节约资源损耗、保护装置。
7、本发明中使用质量测定仪，使排出的土的量与注入的加气水泥的质量之间达到平衡，保证加固区域内地层自重应力等效与水土压力平衡，进而保证加固区域地层的自重应力等效，避免加固后局部性密度增加发生沉降，减小对施工周边环境的扰动，安全可靠。
附图说明
图1是本发明螺旋铰吸式加气水泥土MJS装置的侧面图；
图2是图1的A—A剖面图；
图3是螺旋带输送装置剖面图；
图4是注浆导管单元示意图。
图中，多孔管1、高压水泥浆管1-1、备用管1-2、负压气管1-3、液压管1-4、负压水管1-5、主气管1-6、分支气管1-6-1、压力传感器线管1-7、压力水管1-8、 预备气管1-9、电源线管1-10、螺旋带输送装置2、外套筒3、集成装置4、高压喷水口5、压力传感器6、高压注浆口7、铰刀头8、铰刀钻头8-1、铰刀刀片8-1-1、铰刀环8-2、压力控制阀门9、出泥口10。
具体实施方式
下面结合附图和实施例对本发明作进一步详细说明。
实施例1
如图1所示，本发明实施例提供了一种螺旋铰吸式加气轻质水泥土MJS装置，包括多孔管1、螺旋带输送装置2、外套筒3、集成装置4、铰刀头8、压力监测系统、质量测定仪和控制台；所述压力监测系统包括压力传感器6和采集仪；所述多孔管、集成装置和铰刀头自上而下连接，所述多孔管外侧安装有外套筒，构成钻杆主体；
如图2所示，所述多孔管1集成高压水泥浆管1-1、备用管1-2、负压气管1-3、液压管1-4、负压水管1-5、主气管1-6、分支气管1-6-1、压力传感器线管1-7、压力水管1-8、预备气管1-9和电源线管1-10；
所述外套筒3顶部设有出泥口10，所述出泥口10与废液箱连接；
如图3所示，所述螺旋带输送装置2包括轴式螺旋传输带和电动装置；所述螺旋带输送装置2设置在多孔管1与外套筒3之间；所述螺旋带输送装置2入口设置在近集成装置4处，出口与出泥口10连通；所述螺旋带输送装置2内靠近顶部区域设置电动装置，使轴式螺旋传输带单独运送土体，避免影响多孔管1旋喷注浆加固；
所述集成装置4的筒壁外侧自上至下设有高压喷水口5、压力传感器6和高压注浆口7；
所述铰刀头8由铰刀钻头8-1和铰刀环8-2组成；所述铰刀钻头8-1和铰刀环8-2固定连接，带锯齿的铰刀刀片8-1-1固定连接在铰刀钻头8-1上；所述铰刀头8位于集成装置4底部，通过集成装置4内部的排泥通道连通；
所述集成装置4内靠近底部区域设置电机装置，用于驱动铰刀头8单独旋转切削土体，避免钻杆整体旋转取土对周围土体产生扰动；
所述集成装置4还设有排土通道，所述排土通道近铰刀头8处为入口，在入口处设置碎石机，将碎土粒中的砾石搅碎，所述排土通道出口与所述螺旋带输送装置2连接，并于排土通道出口处设置排泥压力仓阀门，使得碎土从排土通道进入螺旋带输送装置2，并用于排出高压水切削后形成的土—水混合物，以及高压注浆后多余的水泥浆；
所述负压气管1-3、负压水管1-5、预备气管1-9均在集成装置4内形成设有压力控制阀门的管路，与排土通道连通后辅助排泥和出土；
所述液压管1-4在集成装置4内形成两个设有压力控制阀门的支路，分别连排泥压力仓阀门和电机装置；
所述压力水管1-8在集成装置4内形成两个设有压力控制阀门的支路，分别连通集成装置4筒壁的高压喷水口5和铰刀头8顶部的压力出水口；所述铰刀头8顶部的压力出水口喷出压力水，一方面，可用于铰刀头8切削土体时减阻和降温，同时便于土—水混合物从排土通道排出，另一方面，可用于平衡经排土通道排出的地下水量，以保证地下水位线不变，防止因地下水下降引起的地面沉降；
所述高压注浆口7成对设置，每个高压注浆口7配置一个注浆导管单元；所述注浆导管单元由高压水泥浆管1-1、主气管1-6、分支气管1-6-1和压力控制阀门9构成；所述分支气管1-6-1为主气管1-6在集成装置4内分支出，通过压力控制阀门9，与高压水泥浆管1-1连通；所述压力控制阀门9用于控制由分支气管1-6-1注入高压水泥浆管1-1气体的压力；
如图4所示，所述高压水泥浆管1-1与分支气管1-6-1连通注入气体后，在近高压注浆口7处穿入主气管1-6中，形成连通高压注浆口7的同轴双层管结构；所述压力控制阀门9通过压力传感器线管1-7内的导线与控制台连接，根据水土压力数据调节分支气管1-6-1内气压，控制气体进入高压水泥浆管1-1的水泥浆中，使得加固区域土体中的气泡均匀分布且孔隙含量稳定；
所述压力传感器6通过压力传感器线管1-7内的导线与采集仪连接，将实时采集的水土压力数据传输至采集仪；所述采集仪与控制台连接；若采集仪监测 到水土压力异常，所述控制台将调整排泥压力仓阀门开合程度，以此控制排出的高压水泥浆和高压水，保证加固区域的水土压力维持恒定；
所述质量测定仪设置在废液箱内，对螺旋带输送装置2抽至废液箱的土—水混合物质量进行测定，将测定数据传输至控制台，通过控制台调整控制灌入加固区域水泥浆的质量，使加固区域施工前后地层自重应力等效。
所述螺旋带输送装置2与所述多孔管1以及所述外套筒3之间具有一定距离，所述距离的设置既要保证螺旋带输送装置2运作时与多孔管1、外套筒3之间无摩擦，也需保证流失碎土量较少；所述螺旋带输送装置2设置的倾斜角度需保证土粒与泥浆大部分可被运出；
进一步地，所述多根多孔管1可通过螺栓连接接长；所述高压水泥浆管1-1上端连接水泥浆仓；所述高压水泥浆管1-1的水泥浆中应掺入速凝剂，经分支气管1-6-1注入气体后，能快速包裹气体形成封闭气泡；所述压力水管1-8上端连接压力水箱；所述预备气管1-9内为压力气体，可用于管路堵塞时加压清孔；所述主气管1-6上端连接空压机；所述负压气管1-3、负压水管1-5、液压管1-4、压力水管1-8和预备气管1-9支路的压力控制阀门、压力传感器6、压力控制阀门9通过电源线管1-10内的电源线供电，均经压力传感器线管1-7内的导线与控制台连接；
所述集成装置4上至少设置一对高压注浆口7；所述分支气管1-6-1的直径由待注入高压水泥浆管1-1内的气体通量确定；所述连通高压注浆口7的同轴双层管结构中的高压水泥浆管1-1直径小于主气管1-6；
进一步地，所述电机装置与液压管1-4的支路、电源线管1-10内的电源线连接，电机装置的控制导线穿过压力传感器线管1-7与控制台连接。
进一步地，所述控制台连接多孔管1、集成装置4、压力监测系统和质量测定仪，调控螺旋铰吸式加气水泥土MJS装置的钻孔作业、高压水削土作业、高压注浆加固作业、排泥作业以及各个压力控制阀门协同控制作业。
进一步地，所述集成装置4最大直径与所述外套筒3直径相同；所述铰刀头8最大外径应大于外套筒3、集成装置4的外径；
另一方面，本发明实施例还提供了一种使用加气泥桨管的施工方法，该方法包括以下步骤：
步骤1：定位放线，在待加固区域内设置地下水位、地面沉降监测点，对地下水位和地面沉降进行实时监测；
步骤2：将螺旋铰吸式加气水泥土MJS装置的各个管路连接完毕后，通过控制台，启动螺旋铰吸式加气水泥土MJS装置的钻进系统进行钻孔作业：电机装置驱动铰刀头8高速旋转，铰刀钻头8-1及其上的铰刀刀片8-1-1切削土体，同时碎石机将待抽出混合物中的砾石搅碎；切削后的土体与压力出水口喷出压力水形成土—水混合物，和搅碎后的砾石一同经排土通道、排泥压力仓阀门、螺旋带输送装置2排出；根据地下水位变化监测数据，通过注入压力水补给地下水，保持地下水位不变；
步骤3：钻孔至设计深度后，关闭电机装置、压力出水口、排泥压力仓阀门，停止钻孔作业；
步骤4：通过控制台，启动螺旋铰吸式加气水泥土MJS装置的高压水削土和高压水泥浆注浆加固系统：通过高压喷水口5喷射出高压水切削土体后，通过高压注浆口7喷射高压水泥浆进行注浆加固；钻杆以一定速度旋转提升，高压喷水口5和高压注浆口7分别持续进行高压水切削土体和高压注浆加固作业；
在高压水切削土体过程中，压力传感器6将水土压力数据经采集仪传输至控制台，通过控制台调整排泥压力仓阀门开合程度，控制排出的高压水泥浆和高压水，保证加固区域的水土压力维持恒定；
在高压注浆过程中，通过控制台控制压力控制阀门9，使得分支气管1-6-1内的压力气体注入高压水泥浆管1-1的水泥浆中，形成气泡均匀分布的加气水泥浆后，由高压注浆口7喷射出进行注浆加固；由质量测定仪对土—水混合物和砾石的质量进行测定，将测定数据传输至控制台，通过控制台调整控制灌入加固区域水泥浆的质量，使加固区域施工前后地层自重应力等效；
步骤5：待土体注浆加固完成后，关闭螺旋铰吸式加气水泥土MJS装置，断开螺旋铰吸式加气水泥土MJS装置各个管路的连接；
步骤6：重复上述步骤直至完成待加固区域的所有注浆加固施工；
应对水泥浆的质量进行检测，保证满足注浆加固要求；钻杆通过顶部动力装置旋转提升，旋转提升速度应保证排土通道将含大量土体的泥浆抽出，并保证注浆的加气水泥土能充分替换加固区域的原状土体，满足加固施工前后地层重力等效的同时提升加固区域的土体强度。
所述步骤5中，分支气管1-6-1注入高压水泥浆管1-1的水泥浆中压力气体应根据注浆加固深度进行实时调整，保证不同深度处加固土体中的气泡均匀分布且孔隙含量稳定；所述灌入加固区域水泥浆的质量应等于排土通道排出的天然土体质量；所述步骤6中，应通过规范规定的方法对注浆加固土体的质量进行检测。
实施例2
一种用于轻质水泥土加固的螺旋铰吸式MJS装置，包括多孔管1、螺旋带输送装置2、外套筒3、集成装置4、铰刀头8、压力监测系统、质量测定仪和控制台；所述压力监测系统包括压力传感器6和采集仪；
所述多孔管1集成高压水泥浆管1-1、备用管1-2、负压气管1-3、液压管1-4、负压水管1-5、主气管1-6、压力传感器线管1-7、压力水管1-8、预备气管1-9、电源线管1-10；
所述螺旋带输送装置2包括轴式螺旋传输带和电动装置；所述螺旋带输送装置2设置在多孔管1与外套筒3之间；所述螺旋带输送装置2的入口与排泥压力阀门连通，出口与出泥口10连通；所述螺旋带输送装置2内顶部区域设置电动装置，连接轴式螺旋传输带单独运送土体，避免影响多孔管1旋喷注浆加固；
所述出泥口10设置在外套筒3顶部，并与外部的废液箱连接；
所述集成装置4的筒壁外侧自上至下设有高压喷水口5、压力传感器6和高压注浆口7
所述铰刀头8由铰刀钻头8-1和铰刀环8-2组成；所述铰刀钻头8-1和铰刀环8-2固定连接，带锯齿的铰刀刀片8-1-1固定连接在铰刀钻头8-1上；所述铰 刀头8位于集成装置4底部，通过集成装置4内部的排泥通道连通；
所述集成装置4内靠近底部区域设置电机装置，单独与铰刀头8连接，仅驱动铰刀头8旋转切削土体，避免牵动钻杆整体旋转取土对周围土体产生扰动；
所述集成装置4还设有排土通道，所述排土通道近铰刀头8处设置碎石机，将碎土粒中的砾石搅碎，所述排土通道出口与所述螺旋带输送装置2连接，并于排土通道出口处设置排泥压力仓阀门，控制碎土从排土通道进入螺旋带输送装置2的速度；
所述负压气管1-3、负压水管1-5、预备气管1-9均在集成装置4内设有压力控制阀门，与排土通道连通后辅助排泥和出土；
所述液压管1-4在集成装置4内形成两个设有压力控制阀门的支路，分别连排泥压力仓阀门和电机装置；
所述压力水管1-8在集成装置4内形成两个设有压力控制阀门的支路，连通集成装置4筒壁的高压喷水口5和铰刀头8顶部的压力出水口；所述铰刀头8顶部的压力出水口喷出压力水，一方面，可用于铰刀头8切削土体时减阻和降温，另一方面，可用于平衡经排土通道排出的地下水量，以保证地下水位线不变，防止因地下水下降引起的地面沉降；
所述高压喷水口5喷出高压水切削土体；所述排土通道用于排出高压水切削后形成的土—水混合物，以及高压注浆后多余的水泥浆；所述高压注浆口7高压水泥浆进一步切削土体并加固；
所述压力传感器6通过压力传感器线管1-7内的导线与采集仪连接，将实时采集的水土压力数据传输至采集仪；所述采集仪与控制台连接；若采集仪监测到水土压力异常，所述控制台将调整排泥压力仓阀门开合程度，以此控制排出的高压水泥浆和高压水，保证加固区域的水土压力维持恒定；
所述质量测定仪设置在废液箱内，对螺旋带输送装置2抽至废液箱的土—水混合物质量进行测定，将测定数据传输至控制台，通过控制台调整控制灌入加固区域水泥浆的质量，使加固区域施工前后地层自重应力等效。
所述螺旋带输送装置2内设置电动装置，使轴式螺旋传输带单独运作，避 免多孔管1进行旋喷注浆时转速较快，轴式螺旋传输带上的碎石或土—水混合物离心飞溅，对外套筒3碰撞产生损坏；
所述多根多孔管1可通过螺栓连接接长；所述高压水泥浆管1-1上端连接水泥浆仓；所述预备气管1-9内为压力气体，可用于管路堵塞时加压清孔；所述压力水管1-8上端连接压力水箱；所述主气管1-6上端连接空压机；所述备用管1-2、负压气管1-3、液压管1-4、负压水管1-5、压力水管1-8和预备气管1-9支路的压力控制阀门、压力传感器6通过电源线管1-10内的电源线供电，均经压力传感器线管1-7内的导线与控制台连接。
所述发泡剂分为第一类发泡剂与第二类发泡剂；所述第一类发泡剂为表面活性类发泡剂，发泡剂经发泡产生的气泡应符合下列要求：
气泡应均匀、细密，气泡密度为48kg/m3～52kg/m3；
标准气泡柱1小时的沉降高度不大于6mm；
标准气泡柱1小时的泌水量不大于20ml；
经消泡试验确定的湿容重增加率应不超过10％。摘自《气泡混合轻质土填筑工程技术规程》表面活性类发泡剂厂家直接供应；所述第二类发泡剂由铝粉、铁粉、拉开粉和少量引气剂，按9：9：1：1的比例混合；所述发泡剂用于在水泥浆料中产生密闭气泡；所述引气剂使气泡数量增加且均匀；所述第二类发泡剂也可根据室内试验和现场试验进行配比调整以适应更多的工程场景。
所述发泡剂加入水泥浆仓的量，根据压力传感器6采集的水土压力数据实时调整，要求轻质水泥土的体积与排出土—水混合物的体积相同；
所述控制台连接多孔管1、集成装置4、压力监测系统和质量测定仪，调控用于轻质水泥土加固的螺旋铰吸式MJS装置的钻孔作业、高压水切削作业、高压注浆加固作业、排泥作业以及各个压力控制阀门协同控制作业。
所述集成装置4最大直径与所述外套筒3直径相同；所述铰刀头8最大外径应大于外套筒3、集成装置4的外径；
所述电机装置与液压管1-4的支路、电源线管1-10内的电源线连接，电机装置的控制导线穿过压力传感器线管1-7与控制台连接。
另一方面，本发明实施例还提供了一种用于轻质水泥土加固的螺旋铰吸式MJS装置的施工方法，该方法包括以下步骤：
S1、定位放线，在待加固区域内设置地下水位、地面沉降监测点，对地下水位和地面沉降进行实时监测；
S2、将用于轻质水泥土加固的螺旋铰吸式MJS装置的各个管路连接完毕后，通过控制台，启动用于轻质水泥土加固的螺旋铰吸式MJS装置的钻进系统进行钻孔作业：电机装置驱动铰刀头8高速旋转，铰刀钻头8-1及其上的铰刀刀片8-1-1切削土体，同时碎石机将待抽出混合物中的砾石搅碎；切削后的土体与压力出水口喷出压力水形成土—水混合物，与碎石一同经排土通道、排泥压力仓阀门进入螺旋带输送装置2，并通过出泥口10排至废液箱；根据地下水位变化监测数据，通过压力出水口注入压力水补给地下水，保持地下水位不变；
S3、钻孔至设计深度后，关闭电机装置、压力出水口、排泥压力仓阀门，停止钻孔作业；
S4、通过控制台，启动用于轻质水泥土加固的螺旋铰吸式MJS装置的高压水削土和高压水泥浆注浆加固系统：通过高压喷水口5喷射出高压水切削土体后，高压注浆口7喷射高压水泥浆进行注浆加固；同时，钻杆以一定速度旋转提升，高压喷水口5和高压注浆口7分别持续进行高压水切削土体和高压注浆加固作业；
在高压水切削土体过程中，压力传感器6将水土压力数据经采集仪传输至控制台，通过控制台调整排泥压力仓阀门开合程度，进而控制排出的高压水泥浆和高压水的量，保证加固区域的水土压力维持恒定；
S5、由质量测定仪对土—水混合物质量进行测定，将测定数据传输至控制台，通过控制台调整控制灌入加固区域泡沫轻质水泥浆的质量，使加固区域施工前后地层自重应力等效；
S6、待土体注浆加固完成后，关闭螺旋铰吸式加气水泥土MJS装置，断开用于轻质水泥土加固的螺旋铰吸式MJS装置各个管路的连接；
钻杆回拔的过程中控制回拔速度，保证砾石充分被排土通道内的碎石机搅 碎，避免堵塞螺旋带输送装置2；
应对水泥浆的质量进行检测，保证满足注浆加固要求；钻杆通过顶部动力装置旋转提升，旋转提升速度应保证排土通道将含大量土体的泥浆抽出，并保证注浆的泡沫轻质水泥土能充分替换加固区域的原状土体，满足加固施工前后地层重力等效的同时提升加固区域的土体强度。
以上结合具体实施例描述了本发明的技术原理。这些描述只是为了解释本发明的原理，而不能以任何方式解释为对本发明保护范围的限制。基于此处的解释，本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具体实施方式，这些方式都将落入本发明的保护范围之内。

Claims (10)

  1. 一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于：包括多孔管、螺旋带输送装置、外套筒、集成装置、铰刀头、压力监测系统、质量测定仪和控制台；所述压力监测系统包括压力传感器和采集仪；
    所述多孔管、集成装置和铰刀头自上而下连接，所述多孔管外侧安装有外套筒，构成钻杆主体；
    所述多孔管集成高压水泥浆管、备用管、负压气管、液压管、负压水管、主气管、压力传感器线管、压力水管、预备气管和电源线管；
    所述外套筒顶部设有出泥口，所述出泥口与废液箱连接；
    所述螺旋带输送装置包括轴式螺旋传输带和电动装置；所述螺旋带输送装置设置在多孔管与外套筒之间，入口设置在近集成装置一端，出口与出泥口连通；所述电动装置用于驱动轴式螺旋传输带；
    所述集成装置的筒壁外侧自上至下设有高压喷水口、压力传感器和高压注浆口；
    所述铰刀头位于集成装置底部，通过集成装置内部的排泥通道连通；
    所述集成装置内设置电机装置，用于驱动铰刀头单独旋转切削土体，避免提升过程中钻杆整体旋转取土对周围土体产生扰动；
    所述集成装置内还设有排土通道，所述排土通道近铰刀头处为入口，在入口处设置碎石机，出口与所述螺旋带输送装置的入口连接，并于排土通道出口处设置排泥压力仓阀门，使得碎土从排土通道进入螺旋带输送装置，并用于排出高压水切削后形成的土—水混合物，以及高压注浆后多余的水泥浆；
    所述主气管连接至高压注浆口；所述负压气管、负压水管、预备气管均在集成装置内形成设有压力控制阀门的管路，与排土通道连通后辅助排泥和出土；
    所述液压管在集成装置内形成两个设有压力控制阀门的支路，分别连排泥压力仓阀门和电机装置；
    所述压力水管在集成装置内形成两个设有压力控制阀门的支路，分别连通 集成装置筒壁的高压喷水口和铰刀头顶部的压力出水口；
    所述高压水泥浆管分为加气水泥浆管和轻质水泥浆管，连通至集成装置的高压注浆口；使用所述加气水泥浆管时，主气管分出分支气管连通至加气水泥浆管用于水泥土打气；使用所述轻质水泥浆管时，水泥浆仓内的轻质水泥浆含有发泡剂；
    所述电源线管用于供电；所述高压喷水口通过高压水切削土体；所述排泥口用于排出高压水切削后形成的土—水混合物，以及高压注浆后多余的水泥浆；
    所述压力控制阀门压力控制阀门通过压力传感器线管内的导线与控制台连接，根据水土压力数据调节分支气管内气压，控制气体进入高压水泥浆管的水泥浆中；
    所述质量测定仪设置在废液箱内，对排泥管抽至废液箱的土—水混合物质量进行测定，将测定数据传输至控制台；
    所述压力传感器通过压力传感器线管内的导线与采集仪连接，所述采集仪与控制台连接；所述控制台用于调控各个压力控制阀门协同控制作业和控制电机。
  2. 根据权利要求1所述的一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于，所述加气水泥浆管上端连接至水泥浆仓，所使用的水泥浆中掺入速凝剂，加气水泥浆管在集成装置内通过若干设有压力控制阀门的分支气管，连通主气管，所述加气水泥浆管与分支气管连通注入气体后，在高压注浆口处穿入主气管中，形成连通高压注浆口的同轴双层管结构。
  3. 根据权利要求2所述的一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于，所述压力控制阀门通过压力传感器线管内的导线与控制台连接，根据压力传感器采集的水土压力数据调节分支气管内气压，控制气体进入高压水泥浆管的水泥浆中；所述分支气管的直径由待注入高压水泥浆管内的气体通量确定；所述连通高压注浆口的同轴双层管结构中的高压水泥浆管直径小于主气管。
  4. 根据权利要求1所述的一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于，所述轻质水泥浆管上端连接至水泥浆仓，水泥浆仓内的轻质水泥浆含 有发泡剂，所述发泡剂分为第一类发泡剂与第二类发泡剂；
    所述第一类发泡剂为表面活性类发泡剂，
    所述第二类发泡剂由铝粉、铁粉、拉开粉和引气剂，按9：9：1：1的比例混合；所述发泡剂用于在水泥浆料中产生密闭气泡；所述引气剂使气泡数量增加且均匀；所述第二类发泡剂根据室内试验和现场试验进行配比调整以适应更多的工程场景。
  5. 根据权利要求4所述的一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于，
    所述发泡剂加入水泥浆仓的量，根据压力传感器采集的水土压力数据实时调整，要求轻质水泥土的体积与排出土—水混合物的体积相同。
  6. 根据权利要求1所述的一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于：
    所述螺旋带输送装置与所述多孔管以及所述外套筒之间具有空隙，保证螺旋带输送装置运作时与多孔管、外套筒之间无接触；所述空隙由出渣碎土颗粒的级配确定，用于减少碎土流失量和碎土引起的卡壳问题；所述螺旋带输送装置设置的倾斜角度由出渣碎土与传输带的摩擦力确定，需保证土粒与泥浆大部分能够被运出。
  7. 根据权利要求1所述的一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于：
    所述预备气管内为压力气体，用于管路堵塞时加压清孔；所述主气管上端连接空压机；所述负压气管、负压水管、液压管、压力水管和预备气管支路的压力控制阀门、压力传感器、压力控制阀门通过电源线管内的电源线供电，均经压力传感器线管内的导线与控制台连接。
  8. 根据权利要求1所述的一种螺旋铰吸式加气轻质水泥土MJS装置，其特征在于：
    所述控制台连接多孔管、集成装置、压力监测系统和质量测定仪，调控螺旋铰吸式加气水泥土MJS装置的钻孔作业、高压水削土作业、高压注浆加固作 业、排泥作业以及各个压力控制阀门协同控制作业；所述电机装置与液压管的支路、电源线管内的电源线连接，电机装置的控制导线穿过压力传感器线管与控制台连接。
  9. 一种螺旋铰吸式加气轻质水泥土MJS装置的施工方法，其特征在于，该方法包括以下步骤：
    定位放线，在待加固区域内设置地下水位、地面沉降监测点，对地下水位和地面沉降进行实时监测；
    将螺旋铰吸式加气水泥土MJS装置的各个管路连接完毕后，通过控制台，启动螺旋铰吸式加气水泥土MJS装置进行钻孔作业；电机装置驱动铰刀头高速旋转，铰刀钻头及其上的铰刀刀片切削土体，同时碎石机将待抽出混合物中的砾石搅碎；切削后的土体与压力出水口喷出压力水形成土—水混合物，和搅碎后的砾石一同经排土通道、排泥压力仓阀门、螺旋带输送装置排出；根据地下水位变化监测数据，通过注入压力水补给地下水，保持地下水位不变；
    钻孔至设计深度后，关闭电机装置、压力出水口、排泥压力仓阀门，停止钻孔作业；
    通过控制台，启动螺旋铰吸式加气水泥土MJS装置的高压水削土和高压水泥浆注浆加固系统：通过高压喷水口喷射出高压水切削土体后，通过高压注浆口喷射高压水泥浆进行注浆加固；钻杆旋转提升，高压喷水口和高压注浆口分别持续进行高压水切削土体和高压注浆加固作业；
    在高压水切削土体过程中，压力传感器将水土压力数据经采集仪传输至控制台，通过控制台调整排泥压力仓阀门开合程度，控制排出的高压水泥浆和高压水，保证加固区域的水土压力维持恒定；
    在高压注浆过程中，若需要给加气水泥浆管加气，则通过控制台控制压力控制阀门，使得分支气管内的压力气体注入高压水泥浆管的水泥浆中，形成气泡均匀分布的加气水泥浆；由高压注浆口喷射出进行注浆加固；由质量测定仪对土—水混合物和砾石的质量进行测定，将测定数据传输至控制台，通过控制台调整控制灌入加固区域水泥浆的质量，使加固区域施工前后地层自重应力等 效；
    待土体注浆加固完成后，关闭螺旋铰吸式加气水泥土MJS装置，断开螺旋铰吸式加气水泥土MJS装置各个管路的连接；
    重复上述步骤，直至完成待加固区域的所有注浆加固施工。
  10. 根据权利要求9所述的施工方法，其特征在于：所述高压注浆过程中，应对水泥浆的质量进行检测，保证满足注浆加固要求；钻杆通过顶部动力装置旋转提升，旋转提升速度应保证排土通道将含大量土体的泥浆抽出，并保证注浆的加气水泥土能充分替换加固区域的原状土体，满足加固施工前后地层重力等效的同时提升加固区域的土体强度。
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