Environment-friendly reinforcement CFG pile, cast-in-place pile, construction method and pile body tolerance testing tool

Abstract

The invention relates to the technical field of foundation engineering, in particular to an environment-friendly reinforcement CFG pile, a cast-in-place pile, a construction method and a pile body tolerance testing tool. The environment-friendly reinforcement CFG pile or cast-in-place pile comprises the environment-friendly reinforcement CFG pile or cast-in-place pile which is formed by bonding and wrapping a cemented body or a flexible body or a semi-rigid pile body and the CFG pile or cast-in-place pile with one or more of equal-diameter, top-expanding, diameter-expanding, bottom-expanding and mixing piles. CFG piles or cast-in-place piles at different depths can be subjected to ultrasonic detection, so that whether the quality of pile bodies is qualified or not after construction is completed is detected, the applicability of the device is further improved, and the quality is easy to control; according to the CFG pile or the cast-in-place pile, a low-carbon cementing material is adopted to replace traditional cement, recycled aggregate is adopted to replace a gravel raw material, cost is reduced, energy is saved, and the emission amount of carbon dioxide is reduced; the economic benefit, the social benefit and the environmental benefit are obvious.

Description

Technical Field

[0001] The invention relates to the technical field of foundation engineering, and in particular to an environmentally friendly reinforced CFG pile and a cast-in-place pile, a construction method and a pile body tolerance testing tool. Background Art

[0002] CFG piles and cast-in-place piles use long spiral drills or rotary drills or rotary drilling or hammering or down-the-hole hammering to take out the soil in the pile to form a pile hole, which produces a large amount of soil and mud, pollutes the environment, and increases the cost of transportation; at the same time, the soil is taken out during the pile hole forming process, which will reduce the friction force on the soil side around the pile, make the pile longer, and increase the cost; especially in soft soil foundation soil, it is easy to cause pile necking, mud inclusion, broken piles, and a large concrete filling coefficient; if the pile end encounters more viscous soil or a sand layer or pebble layer with high water pressure, the concrete outlet valve at the bottom of the drill bit is easy to fail to open, resulting in a virtual pile at the pile end and low end resistance; when pressure pouring concrete, artificial experience control causes over-pouring of concrete on the pile top, concrete waste, increased difficulty in excavating the soil between piles, breaking the pile head, resulting in secondary pile cutting and pile connection, increased cost, and delayed construction period.

[0003] In order to make a more accurate comparison: For example, the invention patent CN104846812A discloses a novel construction method for non-soil-extracting CFG piles, which adopts a layered soil-extracting drill rod. After the non-soil-extracting drill rod is drilled to a predetermined pile hole depth, the layered soil-extracting drill rod is lifted 30 cm and a concrete pump is started to pressure-fill concrete into the bottom of the pile hole. At the same time, the layered soil-extracting drill rod is slowly rotated clockwise and lifted until it is pressure-filled to the designed pile top elevation to complete the pile body construction. This prior art squeezes soil to form a hole and improves the bearing capacity. However, when pumping pressure-filled concrete, there are problems such as empty soil at the pile end and over-filling at the pile top, just like the above-mentioned conventional CFG bored piles.

[0004] For example, in patent CN103981880A, a method for treating composite foundation of CFG piles with expanded top and bottom is adopted. After the pile body is bored, the filler at the lower part of the pile end is rammed with a column hammer to form the pile bottom: the construction method of the prior art is to use a 3500KN column hammer to ram broken bricks, broken concrete blocks, cement mixtures, crushed stones, pebbles and slag to form the expanded bottom; the prior art forms the expanded bottom by ramming the filler with a 3500KN column hammer, and has the advantages of high pile bearing capacity and no mud discharge; the following problems also exist: first, the filler is rammed to expand the bottom, and the more filler, the greater the ramming energy and the greater the vibration effect; the surrounding environment is affected, causing residents to make trouble, stop work, and even cause drawings to be changed, delay the construction period, etc.; second, the more filler, the more obvious the ramming and squeezing effect is, which is easy to cause the pile body to float, and the pile body and the expanded bottom of the pile end are separated and enter the mud, causing the pile to settle too much, and the bearing capacity does not meet the design requirements, resulting in additional piles, increased costs, and delayed construction period.

[0005] For example, patent CN110206030A discloses an extruded, sprayed, expanded-hole, pressure-grouted concrete pile and its construction method and drilling rig; it uses high-pressure rotary spraying technology to increase the number of repeated sprayings at different depths of the stratum with multi-layer nozzles, spraying different diameter expanded bodies to form a wedge-shaped inverted cone pile shape, thereby improving the bearing capacity of the pile; there are the following problems: first, the high spraying pressure and soil layer changes greatly, the expanded diameter causes the diameter to be different, and the pile bearing capacity varies greatly; second, when pumping and pressure-growing concrete, there are problems such as empty soil at the pile end and over-pouring of concrete at the pile top, just like the above-mentioned CFG piles and cast-in-place piles.

[0006] Problems with the above prior art: 1. The hole-making processes such as spiral drilling or rotary drilling will cause a large amount of soil or mud to be transported out, polluting the environment.

[0007] 2. When the spiral excavator encounters relatively sticky soil or a sandy or pebble layer with excessive water pressure, the valve at the bottom of the drill bit is likely to be unable to open, resulting in loose soil at the pile end and low resistance at the pile end; rotary bored piles are prone to stepping on the hole, resulting in a large sediment thickness, a large concrete filling coefficient, a low single cubic concrete bearing capacity, and a high cost.

[0008] 3. When pumping concrete into spiral CFG piles, human experience control causes over-pouring of concrete on the pile top, increases the difficulty of excavating the soil between piles, easily breaks the pile head, causes secondary pile cutting and connection, increases costs, and delays the construction period.

[0009] Fourth, CFG piles use column hammer fillers to expand the bottom, which produces a vibration effect and affects the surrounding environment; when expanding the bottom, a soil squeezing effect is produced, causing the pile body to float, the pile settlement is too large, and the bearing capacity is low.

[0010] 5. High-pressure rotary jetting to expand the diameter or bottom. Due to the changes in the geological structure and soil layers, the grouting injection pressure is difficult to control. The diameters of the rotary jetting expansion and bottom expansion are not equal, and the bearing capacity of the piles varies greatly, which can easily cause uneven settlement of the building.

[0011] 6. The existing technology of grouting and concrete uses traditional cement and sandstone raw materials, which causes waste of resources. Cement will emit a large amount of carbon dioxide and pollute the environment.

[0012] 7. After the construction of CFG piles or cast-in-place piles is completed, the above-mentioned device cannot detect the quality of the pile body after construction.

[0013] Therefore, in order to solve the above problems, the existing CFG piles and cast-in-place piles, construction methods and testing devices are improved. Summary of the invention

[0014] The present invention provides an environmentally friendly reinforced CFG pile and a cast-in-place pile; On the one hand: environmentally friendly reinforced CFG piles and bored piles, the reinforcement includes a cementing body or a flexible body or a semi-rigid body or a mixing pile bonded and wrapped CFG pile or bored pile, completing any one or several composite forms of equal diameter, expanded bottom, expanded diameter, expanded top and mixing piles. Environmentally friendly reinforced CFG piles and environmentally friendly reinforced bored piles.

[0015] The CFG pile is plain concrete.

[0016] The cast-in-place pile is a reinforced concrete pile in which a steel cage and main reinforcement anchorage length meet design requirements are vertically inserted into the center of the CFG pile using a special vibrating hammer.

[0017] Furthermore, the concrete is low-carbon concrete; the strength of the low-carbon concrete is C20-C120.

[0018] Low-carbon concrete includes a mixture of low-carbon cementitious materials that replace cement, recycled aggregates, water and water-reducing agents.

[0019] Low-carbon cementitious materials include at least two or more of the solid wastes from multiple sources, such as fly ash, steel slag, slag, vaporized slag, manganese slag, carbide slag, lithium slag, industrial by-gypsum, coal gangue, tailings, red mud, aluminum ash, fly ash, sludge, alkali slag and salt mud. After pre-treatment, crushing, drying, thermal activation, physical activation and chemical activation, they are transformed into ultra-fine powders with a specific surface area of ​​400-600㎡ / kg, which can replace traditional cement, and the performance indicators meet or exceed those of cement.

[0020] Recycled aggregates include any one or a mixture of pre-treated construction waste, waste rock, waste slag and tailings.

[0021] Furthermore, the cementing body comprises a reinforcement body of the soil around the pile after grouting, injection, vibration and compaction to form holes and consolidation, and the diameter of the cementing body is 1.0-1.2 times the diameter of the CFG pile.

[0022] Furthermore, the flexible body comprises a reinforcement body which is formed by mixing slurry or powder with foundation soil to form any one or several composite forms of bottom expansion, diameter expansion, top expansion and mixing piles, and the diameter of the flexible body is 1.5-2.5 times the diameter of the CFG pile or cast-in-place pile.

[0023] Preferably, the strength of the flexible body is 1.0-10Mpa.

[0024] Furthermore, the semi-rigid body comprises a reinforcement body of a mixture of slurry or powder, water and recycled aggregate, and the diameter of the semi-rigid body is 1.5-2.5 times the diameter of the CFG pile or the cast-in-place pile.

[0025] Preferably, the strength of the semi-rigid body is 5.0-20 MPa.

[0026] Furthermore, the slurry comprises a mixture of the split body and water, and the water-cement ratio of the mixture is 0.5-2.5.

[0027] Furthermore, the powder includes any one or a mixture of low-carbon cementitious materials, soil solidifiers and other solidifiers; and the slurry includes a mixture of powder and water.

[0028] Preferably, the powder content is 5-30%.

[0029] On the other hand: The construction method of the environmentally friendly reinforced CFG pile and the environmentally friendly reinforced cast-in-place pile adopts a multi-channel drilling tool during the construction process. The multi-channel drilling tool includes a vibrating spiral power head, a rotary joint, a drill rod, a drill bit, high and low pressure nozzles, cutting tools, spiral blades, wing expansion blades, extrusion and expansion devices and concrete outlet hydraulic valves. The vibrating spiral power head drives the high and low pressure nozzles, cutting tools, spiral blades, wing expansion blades, extrusion and expansion devices and concrete outlet hydraulic valves of the water, gas, slurry and powder media on the rotary joint, drill rod and drill bit, together with pressure grouting, spiral cutting, wing expansion mixing, drilling vibration, compaction and hole formation, pressure pouring concrete or rear insertion of steel cage, to complete any one or several composite forms of equal diameter, bottom expansion, diameter expansion, top expansion and mixing piles. The construction steps include the following: A1: GPS or Beitou system to determine the stake position.

[0030] A2: The verticality of the drill pipe is ≤ 0.5% obtained through the tilt sensor.

[0031] When the data transmitted by the drill pipe tilt sensor is less than or equal to the preset value of the drill pipe verticality, the drill pipe start signal is displayed.

[0032] If the data transmitted by the drill rod verticality sensor is greater than the preset value of the drill rod verticality, the drill rod adjustment signal will be displayed.

[0033] A3: Adjust the high and low pressure nozzle pressures of different media such as water, gas, slurry and powder to the minimum state.

[0034] Start the vibrating screw power head and begin drilling into the foundation soil. The infrared rangefinder tracks and measures the hole depth.

[0035] A4: According to the hardness and moisture content of the foundation soil, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-10Mpa, and drill to the preset depth.

[0036] A5: Close the high and low pressure nozzles to the minimum pressure, lift the drill 30cm, start pumping concrete, open the concrete outlet of the hydraulic valve at the bottom of the drill bit, start concrete pouring, start the vibrating screw power head, rotate and compact the pile hole while lifting the drill at a uniform speed to pour concrete to the pile top elevation +50cm, close the concrete outlet of the hydraulic valve at the bottom of the drill bit, lift the drill to the ground, and complete the construction of equal-diameter environmentally friendly reinforced CFG piles.

[0037] A6: Complete steps A1-A4, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-20Mpa, open the wing expansion blades so that the outer diameter of the blades is equal to 1.5-2.5 times the diameter of the CFG pile, expand the bottom of the pile end, and spray and stir up and down according to the bottom expansion height to complete the stirring and bottom expansion; retract the open wing expansion blades, continue to lift the drill to the diameter expansion position or the top expansion position, continue to open the wing expansion blades so that the outer diameter of the blades is equal to 1.5-2.5 times the diameter of the CFG pile; according to the diameter expansion or top expansion height, spray and stir up and down to the pile top elevation, and continue to drill to the preset depth; repeat step A5 to complete the construction of any one or several composite forms of bottom expansion, diameter expansion and top expansion.

[0038] A7: Complete steps A1-A4, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-20Mpa, spray at the bottom for 30s, open the wing expansion blades so that the outer diameter of the blades is equal to 1.5-2.5 times the diameter of the CFG pile, spray and stir while raising the drill to the pile top elevation at a uniform speed, continue to drill, spray and stir again to the preset depth, and retract the wing expansion blades; repeat step A5 to complete the construction of the environmentally friendly reinforced CFG pile of the mixing pile.

[0039] A8: After completing any step in A5, A6 or A7, use a special vibrating hammer to vertically insert the steel cage into the center of the CFG pile. When the anchorage length of the main reinforcement of the steel cage meets the design requirements, the construction of any one or several composite forms of environmentally friendly reinforced cast-in-place piles including equal diameter, expanded bottom, expanded diameter, expanded top and mixing pile reinforcements is completed.

[0040] Furthermore, the slurry is a mixture of powder and water, and the water-cement ratio of the mixture is 0.5-2.5.

[0041] Furthermore, the powder includes low-carbon cementitious materials, soil solidifying agents or other solidifying agents; the powder content is 5-30%.

[0042] The third aspect: pile tolerance test tooling, which is used to carry out tolerance test on CFG piles or bored piles after construction. The test tooling includes a horizontal plate with a connecting end provided on the horizontal plate, which is used to connect to an external lifting device, and the horizontal plate is used to contact the upper end of the CFG pile or bored pile. Sliding grooves are provided on both sides of the horizontal plate, and strip grooves are also provided on the inner side walls of the sliding grooves. A sliding plate is slidably provided in the sliding grooves, and one side of the sliding plate extends into the strip grooves and is slidably connected to the strip grooves.

[0043] Preferably, a rotating screw rod is slidably inserted into the two strip grooves, and one end of the rotating screw rod passes through the outer wall of the horizontal plate and is sleeved with a rotating handle, and a rotating rod assembly for drilling toward the ground is provided on the sliding plate.

[0044] Preferably, the rotating rod assembly includes a rotating rod that is threadedly connected to the sliding plate, and an insertion groove is provided at the lower end of the rotating rod, an insertion rod is provided on the upper side of the rotating rod, a main shaft is threadedly connected in the insertion groove, a cylinder is provided at the lower end of the main shaft, and an ultrasonic detection unit for ultrasonically detecting the quality of the CFG pile or the cast-in-place pile is provided in the cylinder.

[0045] Preferably, the ultrasonic detection unit includes a circular cavity opened on the inner wall of the cylinder, a rectangular groove penetrating therethrough is opened at the lower end of the circular cavity, a driving cylinder is arranged in the rectangular groove through a cylinder seat, an extension plate extending into the circular cavity is arranged at the telescopic end of the driving cylinder, a support column is arranged on one side of the extension plate, and a rectangular plate is arranged on the side of the support column away from the extension plate.

[0046] Preferably, an ultrasonic transmitter is provided on the rectangular plate on one side, and an ultrasonic receiver is provided on the rectangular plate on the other side. A transfer column with one end passing through one side of the rectangular plate is provided on the ultrasonic transmitter and the ultrasonic receiver. An arc-shaped through groove which is connected with the circular cavity is also provided on the outer side of the cylinder, and the arc-shaped through groove corresponds to the transfer column. A wiping component for wiping off the soil on the outside of the CFG pile or the cast-in-place pile is also provided on the rectangular plate.

[0047] Preferably, the wiping assembly includes two longitudinal plates symmetrically arranged on one side of the rectangular plate, a swinging plate is hinged on the longitudinal plate by a torsion spring, and the two swinging plates correspond to the arc-shaped through groove, a bending plate is arranged on one side of the swinging plate close to the arc-shaped through groove, a blocking plate is arranged on the longitudinal plate, and a sticking plate tightly attached to the blocking plate is also arranged at the hinge of the swinging plate.

[0048] Preferably, an opening and closing component for sealing the arc-shaped through groove is also provided in the through groove, and the opening and closing component includes an arc-shaped groove opened on the inner walls on both sides of the arc-shaped through groove, an arc-shaped sealing plate is slidably provided in the arc-shaped groove, and a pushing spring is also provided between the arc-shaped sealing plate and the inner wall of the arc-shaped groove.

[0049] In summary, the present application includes at least one of the following beneficial technical effects: 1. The vibrating spiral power head is used to drive the high and low pressure nozzles, spiral blades and extrusion and expansion devices on the outside of the drill bit to perform grouting and compaction drilling to form a hole. The mud generated during the drilling process is repeatedly squeezed into the soil around the pile by the extrusion and expansion devices installed on the upper part of the drill bit and the upper and lower parts of the drill rod. There is no soil and mud on the ground, and no treatment or transportation is required, which saves costs and is pollution-free.

[0050] 2. Because the outer diameter of the cutting tool, spiral blade and extrusion and expansion device is equal to the diameter of the CFG pile or cast-in-place pile, the pile hole after repeated compaction has high density and small concrete filling coefficient. The friction of the soil around the pile after pressure grouting, jet penetration and vibration compaction and solidification is greatly improved.

[0051] 3. Grouting and expansion wing mixing are used to expand the top, diameter, bottom and mix the piles. It uses large-diameter and cheap solidified soil to increase the area around the pile and the bottom expansion area at the pile end, further improve the side friction resistance, pile end resistance and horizontal bearing capacity of the pile, and improve the overall stability of the pile. At the same time, it can reduce the density of the pile and save costs.

[0052] 4. The flexible opening and closing of the hydraulic valve at the concrete outlet at the bottom of the drill bit ensures that there is no loose soil or sediment at the pile end, and the concrete on the pile top is not over-filled, which reduces the difficulty of excavating soil between piles, reduces pile cutting and pile connection, and further saves costs.

[0053] 5. Use low-carbon cementitious materials to replace traditional cement, and solid waste recycled aggregates to replace sand and gravel raw materials to prepare low-carbon concrete, which will further reduce costs; at the same time, save resources and reduce carbon dioxide emissions.

[0054] 6. By drilling the detection equipment deep into the soil, ultrasonic detection can be performed on CFG piles or cast-in-place piles at different depths to detect whether the quality of the pile body is qualified after the construction is completed, further improving the practicality of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0056] Figure 1 It is a structural schematic diagram of the multi-channel drilling tool of the present invention.

[0057] Figure 2 The present invention Figure 1 A partial enlarged view of point A in the middle.

[0058] Figure 3 It is a main body schematic diagram of the pile tolerance testing tool of the present invention.

[0059] Figure 4 It is a schematic diagram of the cross-sectional structure of the pile tolerance testing tool of the present invention.

[0060] Figure 5 It is a plan cross-sectional view of the rotating rod assembly of the present invention.

[0061] Figure 6 It is a schematic structural diagram of a cross-section of a cylinder of the present invention.

[0062] Figure 7 It is a structural schematic diagram of the ultrasonic detection unit of the present invention.

[0063] Figure 8 It is a planar cross-sectional view of the ultrasonic detection unit, the wiping assembly and the opening and closing assembly of the present invention.

[0064] Fig. 9 It is a schematic structural diagram of the drive unit of the present invention.

[0065] Fig.10 The present invention Fig. 9 A partial enlarged view of point B in the middle.

[0066] Fig.11 It is a schematic diagram of the working process of the construction method of the environmentally friendly reinforced CFG pile and cast-in-place pile of the present invention.

[0067] In the figure, 1, vibrating screw power head; 10, rotary joint; 11, drill rod; 12, drill bit; 13, high and low pressure nozzles; 14, cutting tool; 15, spiral blade; 16, wing expansion blade; 17, extrusion expansion device; 18, concrete outlet hydraulic valve; 2, cross plate; 20, connecting end; 21, sliding groove; 22, strip groove; 23, sliding plate; 24, rotating screw; 25, rotating handle; 3, rotating rod assembly; 30, rotating rod; 31, inserting rod; 32, main shaft; 33, cylinder; 34, drilling tool; 4, ultrasonic detection unit; 40, circular cavity; 41, rectangular shaped groove; 42, driving cylinder; 43, extension plate; 44, supporting column; 45, rectangular plate; 46, ultrasonic transmitter; 47, ultrasonic receiver; 48, transmission column; 49, arc-shaped through groove; 5, wiping assembly; 50, longitudinal plate; 51, swing plate; 52, bending plate; 53, blocking plate; 54, pasting plate; 6, opening and closing assembly; 60, arc-shaped groove; 61, arc-shaped blocking plate; 62, pushing spring; 7, driving unit; 70, ferrule; 71, driving groove; 72, driving key; 73, outer gear ring; 74, supporting plate; 75, driving rod; 76, driving gear. DETAILED DESCRIPTION

[0068] The following combination Figures 1 to 11 Embodiments of the present invention are described in detail.

[0069] Example 1: Reference Figure 1 , Figure 2 and Fig.11As shown, the environmentally friendly reinforced CFG pile and bored pile include a cementing body or a flexible body or a semi-rigid pile body or a mixing pile bonding and wrapping the CFG pile or bored pile phase to form any one or several composite forms of equal diameter, expanded top, expanded diameter, expanded bottom and mixed piles.

[0070] CFG piles are plain concrete.

[0071] Cast-in-place piles are made by vertically inserting a steel cage into the center of the CFG pile using a special vibrating hammer. When the anchorage length of the main reinforcement of the steel cage meets the design requirements, a reinforced concrete pile is formed.

[0072] Furthermore, the concrete strength is C20-C120.

[0073] Furthermore, the pile body diameter of the CFG pile or cast-in-place pile is 400㎜-1500㎜.

[0074] Preferably, the concrete is low-carbon concrete, which is a mixture of low-carbon cementitious materials, recycled aggregate, water and a water reducing agent.

[0075] Furthermore, the low-carbon cementitious material includes at least two or more of multi-source solid wastes such as fly ash, steel slag, slag, vaporized slag, manganese slag, carbide slag, lithium slag, industrial by-gypsum, coal gangue, tailings, red mud, aluminum ash, fly ash, sludge, alkali slag and salt mud, which are mixed and pre-treated by crushing, drying, thermal activation, physical activation and chemical activation to become ultra-fine powder with a specific surface area of ​​400-600㎡ / kg, which can replace traditional cement and have performance indicators that meet or exceed those of cement.

[0076] Furthermore, the recycled aggregate includes any one or a mixture of coarse and fine materials selected from construction waste recycled aggregate, waste rock, waste slag and tailings.

[0077] The diameter of the reinforcement is 1-2.5 times the diameter of the CFG pile or cast-in-place pile; the strength of the reinforcement is 0.5-20Mpa.

[0078] Furthermore, the cementing body includes a reinforcement body of the soil around the pile after grouting, injection, vibration and compaction to form holes and consolidation.

[0079] Furthermore, the flexible body includes a mixing pile formed by mixing slurry or powder with foundation soil.

[0080] Further, the semi-rigid piles include a reinforcement of a slurry or a mixture of powder with water and recycled aggregate.

[0081] Preferably, the diameter of the reinforcement is 1-2.5 times the diameter of the CFG pile or the cast-in-place pile; the strength of the reinforcement is 0.5-20 MPa.

[0082] Furthermore, the slurry is formed by mixing the powder and water, and the water-cement ratio is 0.5-2.5.

[0083] Furthermore, the powder includes any one of low-carbon cementitious materials or soil solidifying agents or other solidifying agents, or a mixture of several of them; the powder content is 5-30%.

[0084] In addition, a multi-channel drilling tool is used during the construction of CFG piles or cast-in-place piles. The multi-channel drilling tool includes a vibrating screw power head 1, a rotary joint 10, a drill rod 11, a drill bit 12, high and low pressure nozzles 13, a cutting tool 14, a spiral blade 15, a wing expansion blade 16, an extrusion and expansion device 17 and a concrete outlet hydraulic valve 18. The rotary joint 10 is installed at the lower end of the vibrating screw power head 1, the drill rod 11 is installed below the rotary joint 10, and the rotary joint 10 drives the drill rod 11 to rotate. The drill bit 12 is installed at the lower end of the drill rod 11, and multiple high and low pressure nozzles 13, cutting tools 14, spiral blades 15 and wing expansion blades 16 are installed along the outside of the drill bit 12, and multiple extrusion and expansion devices 17 are installed on the upper part of the drill bit 12 and on the outside of the drill rod 11.

[0085] The vibrating spiral power head 1 drives the high and low pressure nozzles 13, cutting tools 14, spiral blades 15, wing expansion blades 16, extrusion and expansion devices 17 and concrete outlet hydraulic valves 18 on the rotary joint 10, drill rod 11 and drill bit 12, and pressure grouting, spiral cutting, wing expansion mixing, drilling vibration, compaction hole formation, vibration pressure concrete pouring or rear insertion of steel cage, etc., to complete any one or several composite forms of environmentally friendly reinforced CFG piles or cast-in-place piles of equal diameter, expanded top, expanded diameter, expanded bottom or mixed piles.

[0086] The vibrating spiral power head 1 drives the high and low pressure nozzles 13, spiral blades 15 and the squeezing and expanding device 17 at the bottom of the drill bit 12 to drill a hole together. The mud generated during the drilling process is repeatedly squeezed into the soil around the pile by the squeezing and expanding device 17 arranged on the upper part of the drill bit 12 and the upper and lower parts of the drill rod 11. There is no need to handle or transport the soil and mud, which saves costs and is pollution-free.

[0087] Continue to refer to Figure 1 , Figure 2 and Fig.11 As shown, this embodiment adopts a construction method of an environmentally friendly reinforced CFG pile or cast-in-place pile, which includes the following steps.

[0088] A1: GPS or Beitou system to determine the stake position.

[0089] A2: The verticality of the drill pipe 11 is ≤ 0.5% obtained by the tilt sensor.

[0090] When the data transmitted by the drill rod 11 tilt sensor is less than or equal to the preset value of the verticality of the drill rod 11, the drill rod 11 start signal is displayed; if the data transmitted by the drill rod 11 verticality sensor is greater than the preset value of the verticality of the drill rod 11, the drill rod 11 adjustment signal is displayed.

[0091] A3: Adjust the pressure of high and low pressure nozzles 13 of different media such as water, gas, slurry and powder to the minimum state; start the vibrating screw power head 1 and start drilling into the foundation soil, and the infrared rangefinder tracks and measures the hole depth.

[0092] A4: According to the hardness and moisture content of the foundation soil layer, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-10Mpa; drill the hole to the preset depth, and close the high and low pressure nozzles 13 to the minimum pressure.

[0093] A5: Lift the drill 30cm and start pumping concrete. Open the concrete outlet of the hydraulic valve at the bottom of the drill bit 12 and start concrete pouring. Start the vibrating screw power head 1, rotate and compact the pile hole while lifting the drill at a uniform speed to pour concrete to the position of +50cm above the pile top elevation. Close the concrete outlet of the hydraulic valve at the bottom of the drill bit 12 and lift the drill to the ground to complete the construction of equal-diameter environmentally friendly reinforced CFG piles.

[0094] Reference Figure 3 and Figure 4 As shown, in order to be able to carry out quality test on the pile body of the completed CFG pile or bored pile, the present application proposes a pile body tolerance test tool; specifically, it includes a cross plate 2, a connecting end 20, a sliding groove 21, a strip groove 22, a sliding plate 23, a rotating screw 24, a rotating handle 25 and a rotating rod assembly 3, the cross plate 2 is provided with a connecting end 20, and the cross plate 2 is used to contact with the upper end of the CFG pile or the bored pile, the connecting end 20 is used to connect to an external lifting device, the external lifting device is a prior art, and can lift the cross plate through the connecting end 20, and lift the cross plate 2 to the upper end of the CFG pile or the bored pile, so that one side of the cross plate 2 can contact with the upper end of the CFG pile or the bored pile.

[0095] Sliding grooves 21 are provided on both sides of the horizontal plate 2, and strip grooves 22 are also provided on the inner side walls of the sliding grooves 21. Sliding plates 23 are slidably arranged in the sliding grooves 21, and one side of the sliding plate 23 extends into the strip grooves 22 and is slidably connected with the strip grooves 22. A rotating screw 24 is slidably passed through the two strip grooves 22, and one end of the rotating screw 24 passes through the outer wall of the horizontal plate 2 and is sleeved with a rotating handle 25, and a rotating rod assembly 3 for drilling toward the ground is provided on the sliding plate 23. The rotating screw 24 can be driven to rotate by rotating the rotating handle 25. When the rotating screw 24 is rotated, the sliding plate 23 can be driven to reciprocate in the corresponding sliding groove 21 by a threaded connection, and the two sliding plates 23 move in relative or opposite directions, so as to adjust the spacing between the two rotating rod assemblies 3 to adapt to CFG piles or cast-in-place piles of different diameters and sizes.

[0096] Reference Figure 4 and Figure 5As shown, the rotating rod assembly 3 is used for drilling toward the ground; specifically, the rotating rod assembly 3 includes a rotating rod 30, an insertion rod 31, a main shaft 32, a cylinder 33, a drill 34 and an ultrasonic detection unit 4, the rotating rod 30 is threadedly connected to the sliding plate 23, and an insertion groove is provided at the lower end of the rotating rod 30, and an insertion rod 31 is provided on the upper side of the rotating rod 30, that is, when the rotating rod 30 is driven to rotate by an external force, it can move up and down on the sliding plate 23, and according to the depth of the CFG pile or the cast-in-place pile, the insertion rods 31 on multiple rotating rods 30 are threadedly inserted on another rotating rod 30 to increase the length of the rotating rod 30.

[0097] A main shaft 32 is provided in the insertion groove through a threaded connection, a cylinder 33 is provided at the lower end of the main shaft 32, a borer 34 is provided at the lower end of the cylinder 33, and an ultrasonic detection unit 4 for ultrasonically detecting the quality of the CFG pile or the cast-in-place pile is provided in the cylinder 33, that is, when the rotating rod 30 rotates, the main shaft 32 can drive the cylinder 33 to rotate and move toward the ground, and during the movement of the cylinder 33, the borer 34 is driven to rotate, so that the drilling effect of the land can be achieved, and the ultrasonic detection unit 4 can be inserted into the ground to detect different heights of the CFG pile or the cast-in-place pile, and the borer 34 is attached to the outside of the CFG pile or the cast-in-place pile to drill the soil downward, so the cylinder 33 is also adjacent to the outer wall of the CFG pile or the cast-in-place pile.

[0098] Reference Figure 6 , Figure 7 and Figure 8 As shown, an ultrasonic detection unit 4 is used for ultrasonically detecting the quality of CFG piles or cast-in-place piles; specifically, the ultrasonic detection unit 4 includes a circular cavity 40, a rectangular groove 41, a driving cylinder 42, an extension plate 43, a support column 44, a rectangular plate 45, an ultrasonic transmitter 46, an ultrasonic receiver 47, a transmission column 48, an arc-shaped through groove 49 and a wiping component 5, the circular cavity 40 is opened on the inner wall of the cylinder 33, and a rectangular groove 41 is opened at the lower end of the circular cavity 40 to penetrate it, a driving cylinder 42 is arranged in the rectangular groove 41 through a cylinder seat, and an extension plate 43 extending into the circular cavity 40 is arranged at the telescopic end of the driving cylinder 42, a support column 44 is arranged on one side of the extension plate 43, and a rectangular plate 45 is arranged on the side of the support column 44 away from the extension plate 43, the driving cylinder 42 can drive the support column 44 to move synchronously through the extension plate 43, and the support column 44 can synchronously drive the rectangular plate 45 on one side to move during the movement.

[0099] An ultrasonic transmitter 46 is provided on the rectangular plate 45 on one side, and an ultrasonic receiver 47 is provided on the rectangular plate 45 on the other side. A transmission column 48 with one end penetrating one side of the rectangular plate 45 is provided on the ultrasonic transmitter 46 and the ultrasonic receiver 47. Both the ultrasonic transmitter 46 and the ultrasonic receiver 47 are existing equipment, and the ultrasonic transmitter 46 is used to transmit ultrasonic waves toward the CFG pile or the cast-in-place pile, and the ultrasonic receiver 47 is used to collect the emitted ultrasonic waves. The specific principle in this implementation process is to use some of the ultrasonic waves transmitted in the CFG pile or the cast-in-place pile to transmit ultrasonic waves. Characteristics, energy loss when passing through the material, reflection when encountering the interface of two media, etc., as well as the existence and amplitude of various discontinuous reflection signals from the inside of the material, the sound propagation time between the incident signal and the received signal, and the attenuation of the energy of the sound wave after passing through the material to judge whether the material strength inside the CFG pile or the cast-in-place pile is qualified, and the transfer column 48 is used to stick to the outer wall of the CFG pile or the cast-in-place pile, so that the ultrasonic transmitter 46 and the ultrasonic receiver 47 can transmit the ultrasonic wave to the CFG pile or the cast-in-place pile and collect the ultrasonic wave inside the CFG pile or the cast-in-place pile.

[0100] An arcuate through groove 49 which is intersecting with the circular cavity 40 is also provided on the outer side of the cylinder 33, and the arcuate through groove 49 corresponds to the transfer column 48, and a wiping component 5 for wiping off the soil on the outer side of the CFG pile or the cast-in-place pile is also provided on the rectangular plate 45, that is, when the test starts, the transfer columns 48 on both sides are indirectly driven by the driving cylinder 42 to press against the outer wall of the CFG pile or the cast-in-place pile through the corresponding arcuate through groove 49 before the test can be carried out.

[0101] Continue to refer to Figure 8 As shown, since soil will be attached to the outside of the CFG pile or the bored pile, when the transfer column 48 is attached to the inner wall of the CFG pile or the bored pile, soil will be separated between its end and the CFG pile or the bored pile, which will affect the test accuracy. Therefore, a wiping component 5 for wiping off the soil on the outside of the CFG pile or the bored pile is provided on the rectangular plate 45; specifically, the wiping component 5 includes a longitudinal plate 50, a swinging plate 51, a bending plate 52, a blocking plate 53 and a sticking plate 54, two longitudinal plates 50 are symmetrically arranged on one side of the rectangular plate 45, a swinging plate 51 is hinged on the longitudinal plate 50 by a torsion spring, and the two swinging plates 51 correspond to the arc-shaped through groove 49, and a bending plate 52 is provided on the side of the swinging plate 51 close to the arc-shaped through groove 49, when the rectangular plate 45 moves, the corresponding swinging plate 51 can be driven to move synchronously by the longitudinal plate 50, and the swinging plate 51 can drive the bending plate 52 to swing on the longitudinal plate 50 along its hinge point.

[0102] In the initial state, the swing plate 51 is driven by the corresponding torsion spring to maintain a vertical angle with the longitudinal plate 50. When the bending plate 52 contacts the outer side of the CFG pile or the cast-in-place pile through the arc-shaped through groove 49, the bending plate 52 is driven by the outer side of the CFG pile or the cast-in-place pile to drive the swing plate 51 to swing along its hinge point, and in this process, the end of the bending plate 52 will slide on the outer wall of the CFG pile or the cast-in-place pile to scrape off the soil attached to the outer wall of the CFG pile or the cast-in-place pile. When the end of the transfer column 48 contacts the outer wall of the CFG pile or the cast-in-place pile, the test can be carried out.

[0103] A blocking plate 53 is provided on the longitudinal plate 50, and a sticking plate 54 which is closely attached to the blocking plate 53 is also provided at the hinge of the swing plate 51. When the two swing plates 51 swing relative to each other, they can drive the sticking plate 54 to swing in the direction opposite to the corresponding blocking plate 53. When the bending plate 52 is no longer in contact with the outer wall of the CFG pile or the bored pile, the torsion spring will drive the corresponding swing plate 51 to swing to the initial position, and then the corresponding sticking plate 54 will be attached to the blocking plate 53, limiting the swing angle of the swing plate 51 to prevent the swing angle of the swing plate 51 from being too large, so that the swing plate 51 cannot be normally unfolded due to abnormal angle when the outer wall of the CFG pile or the bored pile is tested next time.

[0104] Continue to refer to Figure 8 As shown, an opening and closing component 6 for sealing the arc-shaped through groove 49 is also provided therein; specifically, the opening and closing component 6 includes an arc-shaped groove 60, an arc-shaped sealing plate 61 and a pushing spring 62, the arc-shaped groove 60 is provided on the inner walls on both sides of the arc-shaped through groove 49, an arc-shaped sealing plate 61 is slidingly provided in the arc-shaped groove 60, and a pushing spring 62 is also provided between the arc-shaped sealing plate 61 and the inner wall of the arc-shaped groove 60.

[0105] In the initial state, the two arc-shaped blocking plates 61 block the arc-shaped slot 49 under the push of the corresponding pushing springs 62 to prevent soil from entering the circular cavity 40 through the arc-shaped slot 49 during the drilling process. When testing is to be carried out, since the two arc-shaped blocking plates 61 are provided with inclined slots on the opposite sides, that is, when the two bending plates 52 contact the inclined slots of the corresponding arc-shaped blocking plates 61, the arc-shaped blocking plates 61 can be pushed back into the corresponding arc-shaped slots 49, and the arc-shaped slots 49 are no longer blocked. That is, at this time, the bending plates 52 and the transfer columns 48 can contact the outer wall of the CFG pile or the cast-in-place pile through the arc-shaped slots 49. When the test is completed and the bending plates 52 are retracted, the arc-shaped blocking plates 61 are no longer subjected to force, and the arc-shaped blocking plates 61 continue to cooperate with the thrust of the corresponding pushing springs 62 to block the arc-shaped slots 49.

[0106] Example 2: Continue to refer to Figure 1 , Figure 2 as well as Fig.11As shown, based on the first embodiment, this implementation process provides a construction method for mixing and expanding the bottom CFG pile and the cast-in-place pile, including the following steps.

[0107] After completing steps A1-A4, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-20 MPa, open the wing expansion blade 16 so that the outer diameter of the blade is equal to 1.5-2.5 times the diameter of the CFG pile, expand the bottom of the pile end, and spray and stir up and down according to the bottom expansion height to complete the mixing and bottom expansion, and retract the open wing expansion blade 16.

[0108] Repeat step A5: close the high and low pressure nozzles 13 to the minimum pressure, lift the drill 30cm, start pumping concrete, open the concrete outlet of the hydraulic valve at the bottom of the drill bit 12, start concrete pouring, start the vibrating screw power head 1, rotate and compact the pile hole while lifting the drill at a uniform speed to pour concrete to the pile top elevation +50cm position, close the concrete outlet of the hydraulic valve at the bottom of the drill bit 12, lift the drill to the ground, and complete the construction of the mixing and bottom expansion environmentally friendly reinforced CFG pile.

[0109] Or use a special vibration hammer to vertically insert the steel cage into the center of the CFG pile and the main reinforcement anchorage length meets the design requirements, and the construction of the mixing and bottom-expanding environmentally friendly reinforced cast-in-place pile is completed.

[0110] Example 3: Continue to refer to Figure 1 , Figure 2 as well as Fig.11 As shown, based on the first and second embodiments, this implementation process provides a construction method for a grouting and mixing expanded diameter CFG pile or a cast-in-place pile, comprising the following steps: Repeat the implementation steps A1-A4 above; lift the drill to the preset grouting, stirring and expanding position, set the nozzle pressure of gas and slurry or powder and slurry to 1.0-20Mpa, open the expansion blades 16 so that the outer diameter of the blades is equal to 1.5-2.5 times the diameter of the CFG pile, and according to the preset grouting, stirring and expanding height, rotate while spraying and stirring up and down; retract the expansion blades 16, close the high and low pressure nozzles 13 to the minimum pressure, and complete the grouting, stirring and expanding; and the expansion can be performed at any one or more places.

[0111] Continue drilling to the preset depth.

[0112] Repeat the construction steps of A5 above to complete the construction of the mixing and expanding environmentally friendly reinforced CFG pile.

[0113] Or use a special vibration hammer to vertically insert the steel cage into the center of the CFG pile and the main reinforcement anchorage length meets the design requirements, and the construction of the mixing and expanding environmentally friendly reinforced cast-in-place pile is completed.

[0114] Example 4: Continue to refer to Figure 1 , Figure 2 as well as Fig.11 As shown, based on the first, second, third and fourth embodiments, this implementation process provides a construction method for grouting, stirring and expanding the top, including the following steps: Repeat the above steps A1-A4.

[0115] Lift the drill to the grouting, stirring and expanding top position, set the nozzle pressure of gas and slurry or powder and slurry to 1.0-5.0Mpa; open the expansion blades 16 so that the outer diameter is equal to the preset grouting, stirring and expanding top diameter, and according to the preset grouting, stirring and expanding top height, rotate while spraying and stirring up and down; retract the expansion blades 16, close the high and low pressure nozzles 13 to the minimum pressure, and complete the grouting, stirring and expanding top.

[0116] Continue drilling to the preset depth.

[0117] Repeat the construction steps of A5 above to complete the construction of the mixing and expanding top environmentally friendly reinforced CFG pile.

[0118] Or use a special vibration hammer to vertically insert the steel cage into the center of the CFG pile and the main reinforcement anchorage length meets the design requirements, and the construction of the mixing, expanding and environmentally friendly reinforced cast-in-place pile is completed.

[0119] Example 5: Continue to refer to Figure 1 , Figure 2 as well as Fig.11 As shown, based on the first, second, third, fourth and fifth embodiments, this implementation process provides a construction method for grouting mixing piles, including the following steps: Repeat the above steps A1-A4.

[0120] Set the nozzle pressure of gas and slurry or powder and slurry to 1.0-20Mpa; open the wing-spreading blades 16 with an outer diameter equal to 1.5-2.5 times the diameter of the CFG pile, rotate, spray, and stir, and lift the drill to the designed elevation of the pile top at a uniform speed; continue to drill, spray, and stir to the preset depth, retract the wing-spreading blades 16, close the high and low pressure nozzles 13 to the minimum pressure, and complete the grouting and mixing pile.

[0121] Repeat the construction steps of A5 above to complete the construction of the environmentally friendly reinforced CFG pile of the mixing pile.

[0122] Or use a special vibration hammer to vertically insert the steel cage into the center of the CFG pile and the main reinforcement anchorage length meets the design requirements, and the construction of the environmentally friendly reinforced cast-in-place pile is completed.

[0123] Embodiment 6: Based on embodiments 1, 2, 3, 4 and 5, any one or several composite forms of reinforcements among equal diameter, expanded bottom, expanded diameter, expanded top and mixing piles are wrapped, bonded and consolidated with CFG piles or cast-in-place piles to form environmentally friendly reinforcement CFG piles or cast-in-place piles.

[0124] Example 7: Reference Fig. 9 and Fig.10 As shown, on the basis of the first embodiment, in order to drive the rotating rod 30 to rotate, a driving unit 7 for driving the corresponding rotating rod 30 is arranged on the sliding block, and the driving unit 7 includes a ring 70, a driving groove 71, a driving key 72, an outer gear ring 73, a support plate 74, a driving rod 75 and a driving gear 76. The ring 70 is rotatably arranged at the upper end of the sliding plate 23, and the rotating rod 30 is located in the middle of the ring 70. The ring 70 can rotate at its upper end under the limitation of the sliding plate 23, that is, rotate around the rotating rod 30.

[0125] A driving groove 71 is provided on the outside of the rotating rod 30, and a driving key 72 located in the driving groove 71 is provided on the inner diameter of the ring 70. During the rotation of the ring 70, the corresponding rotating rod 30 can be driven to rotate through the cooperation of the driving key 72 and the driving groove 71. When the rotating rod 30 moves in the up and down directions, since the driving key 72 is slidably connected to the driving groove 71, the rotating rod 30 can continue to move.

[0126] An outer gear ring 73 is also provided on the outer diameter of the ring 70, and a support plate 74 is provided on one side of the sliding block. A driving rod 75 is rotatably provided on the support plate 74. The driving rod 75 is sleeved with a driving gear 76 meshing with the outer gear ring 73, that is, the driving rod 75 can be connected to an external driving motor to drive it to rotate on the support plate 74. When the driving rod 75 rotates, it can drive the driving gear 76 to rotate, and the driving gear 76 drives the outer gear ring 73 to rotate synchronously. The outer gear ring 73 can drive the corresponding ring 70 to rotate, so that the ring 70 has sufficient driving force to drive multiple rotating rods 30 to rotate synchronously.

[0127] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0128] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Environmentally friendly reinforced CFG piles and cast-in-place piles, characterized by: The reinforcement body includes a cementing body or a flexible body or a semi-rigid body or a mixing pile bonded to wrap a CFG pile or a cast-in-place pile; the CFG pile is plain concrete; the cast-in-place pile is a reinforced concrete pile formed by inserting a steel cage into the CFG pile; the diameter of the CFG pile or cast-in-place pile is 400 mm-1500 mm; The cementing body comprises a reinforcement body of the soil around the pile after grouting, injection, vibration and compaction to form holes and consolidate, and the diameter of the cementing body is 1.0-1.2 times the diameter of the CFG pile or the cast-in-place pile; The flexible body comprises a reinforcement body which is formed by mixing slurry or powder with foundation soil to form any one or a combination of bottom expansion, diameter expansion, top expansion and mixing piles, and the diameter of the flexible body is 1.5-2.5 times the diameter of the CFG pile or cast-in-place pile; The semi-rigid body comprises a reinforcement body formed by mixing slurry or powder, water and recycled aggregate, and the diameter of the semi-rigid body is 1.5-2.5 times the diameter of the CFG pile or the cast-in-place pile.

2. The construction method of environmentally friendly reinforced CFG pile and cast-in-place pile is characterized in that: The invention comprises a vibrating spiral power head (1), a rotary joint (10), a drill rod (11), a drill bit (12), high and low pressure nozzles (13), a cutting tool (14), a spiral blade (15), a wing expansion blade (16), an extrusion expansion device (17) and a concrete outlet hydraulic valve (18) on a multi-channel drilling tool; the vibrating spiral power head (1) drives the high and low pressure nozzles (13), a cutting tool (14), a spiral blade (15), a wing expansion blade (16), an extrusion expansion device (17) and a concrete outlet hydraulic valve (18) on the rotary joint (10), the drill rod (11) and the drill bit (12) for different media such as water, gas, slurry and powder, to perform pressure grouting, spiral cutting, wing expansion mixing, drilling vibration, compaction hole formation and pressure pouring of concrete or rear insertion of steel cage, so as to complete any one or a combination of the following forms of equal diameter, bottom expansion, diameter expansion, top expansion and mixing piles, environmentally friendly reinforced CFG piles or environmentally friendly reinforced cast-in-place piles; The construction steps include: A1: GPS or Beitou system to determine the stake position; A2: Obtain the verticality of the drill pipe (11) ≤ 0.5% through the tilt sensor; When the data transmitted by the drill rod (11) tilt sensor is less than or equal to a preset value of the verticality of the drill rod (11), a start signal of the drill rod (11) is displayed; If the data transmitted by the drill rod (11) verticality sensor is greater than the preset value of the drill rod (11) verticality, a drill rod (11) adjustment signal is displayed; A3: Adjust the pressure of high and low pressure nozzles (13) of different media such as water, gas, slurry and powder to the minimum state; The vibrating screw power head (1) is started to drill into the foundation soil, and the infrared rangefinder tracks and measures the hole depth; A4: According to the hardness and moisture content of the foundation soil, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-10Mpa, and drill to the preset depth; A5: Close the high and low pressure nozzles (13) to the minimum pressure, raise the drill 30 cm, start pumping concrete, open the concrete outlet of the hydraulic valve at the bottom of the drill bit (12), start concrete pouring, start the vibrating screw power head (1), rotate and compact the pile hole, raise the drill at a constant speed to pour concrete to the pile top elevation +50 cm, close the concrete outlet of the hydraulic valve at the bottom of the drill bit (12), raise the drill to the ground, and complete the construction of the equal-diameter environmentally friendly reinforced CFG pile; A6: After completing steps A1-A4, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-20 MPa, open the wing expansion blade (16) so that the outer diameter of the blade is equal to 1.5-2.5 times the diameter of the CFG pile, expand the bottom of the pile end, and spray and stir up and down according to the bottom expansion height to complete the stirring and bottom expansion; retract the open wing expansion blade (16), continue to lift the drill to the diameter expansion position or the top expansion position, continue to open the wing expansion blade (16) so that the outer diameter of the blade is equal to 1.5-2.5 times the diameter of the CFG pile; according to the diameter expansion or top expansion height, spray and stir up and down to the pile top elevation, and continue to drill to a preset depth; repeat step A5, that is, complete the construction of any one or a combination of the bottom expansion, diameter expansion and top expansion forms of the environmentally friendly reinforced CFG pile; A7: Complete steps A1-A4, set the nozzle pressure of water and powder or gas and slurry or powder and slurry to 1.0-20 MPa, spray at the bottom for 30 seconds, open the wing expansion blade (16) so that the outer diameter of the blade is equal to 1.5-2.5 times the diameter of the CFG pile, spray and stir while raising the drill to the pile top elevation at a constant speed, continue drilling, spray and stir again to the preset depth, and retract the wing expansion blade (16); repeat step A5 to complete the construction of the environmentally friendly reinforced CFG pile of the mixing pile; A8: After completing any step in A5, A6 or A7, use a special vibrating hammer to vertically insert the steel cage into the center of the CFG pile. When the anchorage length of the main reinforcement of the steel cage meets the design requirements, the construction of any one or several composite forms of environmentally friendly reinforced cast-in-place piles including equal diameter, expanded bottom, expanded diameter, expanded top and mixing pile reinforcements is completed.

3. The construction method of the environmentally friendly reinforced CFG pile and cast-in-place pile according to claim 2, characterized in that: The concrete comprises low-carbon cementitious materials, recycled aggregate, water and water reducing agent mixed together to form low-carbon concrete; the strength of the low-carbon concrete is C20-C120; The low-carbon cementitious material includes at least two or more of fly ash, steel slag, slag, vaporized slag, manganese slag, carbide slag, lithium slag, industrial by-gypsum, coal gangue, tailings, red mud, aluminum ash, fly ash, sludge, alkali slag and salt mud, etc., which are mixed and pre-processed by crushing, drying, thermal activation, physical activation and chemical activation to become ultra-fine powder with a specific surface area of ​​400-600 m2 / kg, replacing traditional cement, and the performance indicators meet or exceed those of cement; The slurry comprises a mixture of split and water, and the water-cement ratio of the mixture is 0.5-2.5; The powder includes any one or a mixture of low-carbon cementitious materials, soil solidifiers and other solidifiers; the slurry includes a mixture of powder and water; the powder content is 5-30%; The recycled aggregate includes any one or a mixture of coarse and fine materials selected from construction waste recycled aggregate, waste rock, waste slag and tailings; The diameter of the reinforcement is 1-2.5 times the diameter of the CFG pile or the cast-in-place pile; the strength of the reinforcement is 0.5-20Mpa.

4. A pile tolerance test tool, which uses the construction method of the environmentally friendly reinforced CFG pile or cast-in-place pile as claimed in claim 2 to perform a tolerance test on the CFG pile or cast-in-place pile after the construction is completed, characterized in that: The test fixture comprises a transverse plate (2), wherein a connection end (20) is provided on the transverse plate (2), the connection end (20) is used to connect an external lifting device, and the transverse plate (2) is used to contact the upper end of a CFG pile or a cast-in-place pile, and sliding grooves (21) are provided on both sides of the transverse plate (2), and a strip groove (22) is also provided on the inner side wall of the sliding groove (21), and a sliding plate (23) is slidably provided in the sliding groove (21), and one side of the sliding plate (23) extends into the strip groove (22) and is slidably connected to the strip groove (22).

5. The pile tolerance testing tool according to claim 4, characterized in that: A rotating screw rod (24) is slidably inserted into the two strip grooves (22), and one end of the rotating screw rod (24) passes through the outer wall of the horizontal plate (2) and is sleeved with a rotating handle (25), and a rotating rod assembly (3) for drilling toward the ground is provided on the sliding plate (23).

6. The pile tolerance testing tool according to claim 4, characterized in that: The rotating rod assembly (3) comprises a rotating rod (30) which is threadedly connected to a sliding plate (23), wherein an insertion groove is provided at the lower end of the rotating rod (30), an insertion rod (31) is provided on the upper side of the rotating rod (30), a main shaft (32) is provided in the insertion groove via a threaded connection, a cylinder (33) is provided at the lower end of the main shaft (32), and an ultrasonic detection unit (4) for ultrasonically detecting the quality of a CFG pile or a cast-in-place pile is provided in the cylinder (33).

7. The pile tolerance testing tool according to claim 5, characterized in that: The ultrasonic detection unit (4) comprises a circular cavity (40) formed on the inner wall of a cylinder (33); a rectangular groove (41) is formed at the lower end of the circular cavity (40) and is connected thereto; a driving cylinder (42) is arranged in the rectangular groove (41) via a cylinder seat; an extension plate (43) extending into the circular cavity (40) is arranged at the telescopic end of the driving cylinder (42); a support column (44) is arranged on one side of the extension plate (43); and a rectangular plate (45) is arranged on the side of the support column (44) away from the extension plate (43).

8. The pile tolerance testing tool according to claim 6, characterized in that: An ultrasonic transmitter (46) is provided on the rectangular plate (45) on one side, and an ultrasonic receiver (47) is provided on the rectangular plate (45) on the other side. A transmission column (48) having one end penetrating one side of the rectangular plate (45) is provided on the ultrasonic transmitter (46) and the ultrasonic receiver (47). An arc-shaped through groove (49) intersecting the circular cavity (40) is also provided on the outer side of the cylinder (33), and the arc-shaped through groove (49) corresponds to the transmission column (48). A wiping component (5) for wiping off soil on the outer side of the CFG pile or the cast-in-place pile is also provided on the rectangular plate (45).

9. The pile tolerance testing tool according to claim 7, characterized in that: The wiping assembly (5) comprises two longitudinal plates (50) symmetrically arranged on one side of the rectangular plate (45); a swing plate (51) is hingedly connected to the longitudinal plate (50) via a torsion spring, and the two swing plates (51) correspond to the arc-shaped through grooves (49); a bending plate (52) is arranged on one side of the swing plate (51) close to the arc-shaped through groove (49); a blocking plate (53) is arranged on the longitudinal plate (50), and a sticking plate (54) is also arranged at the hinge of the swing plate (51) and is tightly attached to the blocking plate (53).

10. The pile tolerance testing tool according to claim 7, characterized in that: The arc-shaped through groove (49) is also provided with an opening and closing assembly (6) for sealing the arc-shaped through groove (49), the opening and closing assembly (6) comprising arc-shaped grooves (60) provided on the inner walls on both sides of the arc-shaped through groove (49), arc-shaped sealing plates (61) being slidably provided in the arc-shaped grooves (60), and a pushing spring (62) being provided between the arc-shaped sealing plates (61) and the inner wall of the arc-shaped groove (60).

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