High-pressure jet stabilized soil stirring construction equipment

Abstract

The utility model relates to high-pressure jet solidified soil stirring construction equipment which comprises a liquid injection pipe and a control device, the liquid injection pipe comprises an inner pipe and an outer pipe, a jet mechanism is arranged at the lower end of the liquid injection pipe and comprises a body, and the body comprises a first pipeline axially communicated with the inner pipe and a second pipeline axially communicated with the outer pipe. The body is provided with more than one spraying assembly, the spraying assembly is communicated with the first pipeline and the second pipeline, the spraying assembly comprises a nozzle body and an outer cover, the nozzle body and the outer cover are coaxially arranged, and the nozzle body comprises a spraying part which is arranged in a horn mouth shape with a large inner end and a small outer end; a spraying channel communicated with the first pipeline is arranged in the nozzle body, a flowing channel is formed between the outer cover and the spraying part in a spaced mode, and the flowing channel is communicated with the second pipeline. By the adoption of the technical scheme, compared with some situations, the spraying range is greatly enlarged; the cut soil becomes waste mud, and the waste mud is conveyed to the upper portion through compressed air sprayed from the flow channel and discharged to the earth surface.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering, and particularly relates to high-pressure jet solidified soil mixing construction equipment. Background Art

[0002] As the remediation of contaminated sites has gradually gained attention and importance in my country, geotechnical construction technology has also been applied to the field of in-situ soil remediation. At present, the main construction technologies for treating foundations in my country are: deep mixing method, three-axis mixing method, and high-pressure rotary spraying method.

[0003] The deep mixing method uses a low-pressure slurry pump (pressure is generally less than 2MPa) to pump the slurry deep into the soil, and directly mix the soil and the reagent through the mixing blades. The conventional mixing method has simple construction machinery, fast construction speed and low cost; however, due to insufficient mechanical power and low pump slurry pressure, it has the disadvantages of limited applicable strata and poor uniformity of the mixed body.

[0004] The three-axis mixing method is developed on the basis of the original deep mixing method (single axis). It adopts three-axis mixing and adds spiral blades on the mixing shaft, and greatly enhances the power. It has high efficiency, good overlap effect and wide application range. In order to make the mixing more uniform, the spiral blades on the mixing shaft are used to fully stir the slurry and soil. In this process, the slurry and some displaced soil blocks fall into the hole, resulting in uneven mixing in the lower part of the mixing body.

[0005] The high-pressure rotary jet method uses high-pressure equipment to eject slurry through a nozzle with a high-pressure jet of nearly 20Mpa, impacting and destroying the soil, and mixing the slurry and the soil. (In traditional devices, since the spray nozzle is located at the bottom of the mixing head, the actual process of rotary jetting is to first cut and mix the soil with the blades on the top of the spray nozzle, and then spray the slurry from the spray nozzle.) Because of its strong drilling and cutting capabilities, it is applicable to a wide range of formations. However, due to the high spraying pressure, the spraying range changes with the hardness of the formation, and because the slurry has poor fluidity in the soil, the range of mixed spraying is unstable Utility Model Content

[0006] In summary, in order to overcome the deficiencies of the prior art, the utility model provides a high-pressure jetting solidified soil mixing construction equipment.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pressure jet solidification soil mixing construction equipment, comprising an injection pipe and a control device for controlling the injection pipe to move up and down, rotate and swing, the injection pipe comprising an inner pipe for injecting solidification liquid, cement and other injection materials and an outer pipe for water supply and gas activities, a jet mechanism is arranged at the lower end of the injection pipe, the jet mechanism comprises a body, the body comprises a first pipe axially connected to the inner pipe and a second pipe axially connected to the outer pipe, more than one jet assembly is arranged on the body, the jet assembly is connected to the first pipe and the second pipe, the jet assembly comprises a nozzle body detachably connected to the first pipe and an outer cover detachably connected to the second pipe, the nozzle body is coaxially arranged with the outer cover, the nozzle body comprises a jet portion arranged in a trumpet shape with a larger inner end and a smaller outer end, a jet channel connected to the first pipe is arranged in the nozzle body, a flow channel is formed between the outer cover and the injection portion, and the flow channel is connected to the second pipe.

[0008] By adopting the above technical solution, the injection tube is inserted into the ground. When it reaches the designated position, the injection tube is rotated, and the solidifying slurry is injected into the inner tube and the compressed air is injected into the outer tube. When the compressed air is sprayed from the flow channel, the solidifying slurry is sprayed from the inside of the spraying part, and the compressed air surrounds the solidifying slurry from the outside to form a compressed air layer around the device, which greatly increases the spraying range compared with some cases; the cut soil becomes waste mud, which is transported to the upper part by the compressed air sprayed from the flow channel and can be discharged to the surface.

[0009] The utility model is further provided with: an exhaust member is arranged between the outer cover and the spray part, the exhaust member is sleeved outside the water spray part, the outer cover is sleeved on the outer wall of the exhaust member, and the flow channel is composed of a plurality of inclined grooves evenly distributed on the outer periphery of the exhaust member.

[0010] By adopting the above technical scheme, when the compressed air sent from the compressor is sprayed from the air injection nozzle at high pressure, if the diameter of the flow channel is of a limited size, it is necessary to increase the output of the compressor or increase the diameter of the flow channel so that the cut soil can be discharged from the ground to the surface as waste. If the diameter of the air injection nozzle is increased, the gas phase film of the compressed air cannot be fully formed around the jet of the solidifying slurry. If the output is increased, greater power consumption is required, which is not cost-effective. Therefore, an exhaust member is provided, and the flow channel is composed of a plurality of inclined grooves evenly distributed on the periphery of the exhaust member. The compressed air surrounds the solidifying slurry in the form of a vortex, thereby increasing the cutting ability of the solidifying slurry and increasing the injection diameter. Since the outer cover is exposed outside the body, the materials (crushed sand, gravel, etc.) generated by the high-pressure slurry cutting the foundation will collide with the outer cover, and the outer cover needs to be replaced after being damaged. The exhaust member and the outer cover are separately provided, and the outer cover can be directly replaced without replacing the exhaust member, which is conducive to reducing maintenance costs. At the same time, the exhaust member of different specifications of the inclined groove can be replaced according to the soil requirements, and the applicability is wider.

[0011] The utility model is further configured that: the inner wall of the exhaust member is matched with the injection portion, the cross-section of the outer wall of the exhaust member is trapezoidal in shape with a larger inner end and a smaller outer end, and the cross-sectional area of ​​the flow channel is 65%-80% of the cross-sectional area of ​​the exhaust member.

[0012] By adopting the above technical solution, it is more in line with fluid mechanics, increases cutting capacity, and can be applied to strata with different soil types.

[0013] The utility model is further arranged that: the center line of the inclined groove is a curve.

[0014] By adopting the above technical solution, compared with the straight inclined trough, the swirl effect of compressed air is better, the wrapping is better, the air thickness is greater, and the jet of solidifying slurry is pushed toward the center by the surrounding rotating compressed air, so that the jet of solidifying slurry is ejected in a straight line instead of in a diffuse shape, thereby increasing the cutting ability.

[0015] The utility model is further configured that: the outer end section of the inclined groove is smaller than the inner end section.

[0016] By adopting the above technical solution, the compressed air is further compressed when ejected, thereby increasing the intensity of the ejection and the ejection diameter.

[0017] The utility model is further provided with: a mounting cavity is provided at the other end of the nozzle body relative to the injection portion, an elastic diverter is provided in the mounting cavity, the elastic diverter includes a first connecting portion and an extension portion, the first connecting portion is interference connected with the mounting cavity, the inner end of the extension portion is provided in the first tube body, a plurality of diverter channels for connecting the first pipeline and the injection channel are provided in the elastic diverter, the injection channel includes a first injection section connected to the diverter channel and a second injection section provided in the injection portion, the first injection section is provided in a bell-shaped configuration with a larger inner end and a smaller outer end, and the second injection section is adapted to the inner diameter of the outer end of the first injection section and is provided in a straight line.

[0018] By adopting the above technical solution, the connection between the nozzle body and the elastic diverter is more stable and convenient for assembly. At the same time, the connection between the diverter channel and the injection channel is more airtight. The diverter channel allows the solidified slurry in the first pipeline to enter the injection channel through the diverter channel, gradually reducing the flow channel diameter, gradually reducing the pressure, and increasing the speed, thereby increasing the flow rate of the solidified slurry and enhancing the cutting ability.

[0019] The utility model is further configured as follows: a "horizontal T-shaped" mounting groove is arranged at a position of the second pipe corresponding to the injection body, the outer end diameter of the mounting groove is larger than the inner end diameter, the outer cover comprises a second connection portion threadedly connected to the inner end of the mounting groove and a third connection portion arranged in the outer end of the mounting groove, the third connection portion is provided with an external thread for threaded connection with a dust cover, and the diameter of the dust cover is adapted to the inner diameter of the outer end of the mounting groove.

[0020] By adopting the above technical solution, assembly is convenient, and a dust cover is provided to protect the injection mechanism when not in operation, so as to prevent foreign objects such as dust from entering and clogging or obstructing the passage.

[0021] The specific implementation of the utility model is described below in conjunction with the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of an embodiment of the utility model;

[0023] Figure 2 for Figure 1 A magnified view of part A;

[0024] Figure 3 It is a three-dimensional diagram of the injection assembly of the embodiment of the utility model;

[0025] Figure 4 A three-dimensional diagram of an exhaust member according to an embodiment of the utility model;

[0026] Figure 5 A three-dimensional diagram of a nozzle body according to an embodiment of the present utility model;

[0027] Figure markings: 1. injection tube, 11. inner tube, 12. outer tube, 2. injection mechanism, 21. main body, 211. first pipeline, 212. second pipeline, 2121. installation groove, 22. injection assembly, 221. nozzle body, 2211. injection part, 2212. injection channel, 22121. first injection section, 22122. second injection section, 2213. installation cavity, 222. outer cover, 2221. second connecting part, 2222. third connecting part, 23. exhaust member, 231. inclined groove, 24. elastic diverter, 241. first connecting part, 242. extension part, 243. diverter channel. DETAILED DESCRIPTION

[0028] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0029] See attached Figure 1-5 The embodiment discloses a high-pressure jetting solidification soil mixing construction equipment, including an injection pipe 1 and a control device for controlling the injection pipe 1 to move up and down, rotate, and swing. The injection pipe 1 includes an inner pipe 11 for injecting solidifying liquid, cement, and other injection materials and an outer pipe 12 for water supply and gas activities. The lower end of the injection pipe 1 is provided with a jet mechanism 2, and the jet mechanism 2 includes a body 21, and the body 21 includes a first pipe 211 axially connected to the inner pipe 11 and a second pipe 212 axially connected to the outer pipe 12. More than one jet assembly 22 is provided on the body 21, and the jet assembly 22 is connected to the inner pipe 11. The first pipeline 211 and the second pipeline 212 are connected, and the injection assembly 22 includes a nozzle body 221 detachably connected to the first pipeline 211 and an outer cover 222 detachably connected to the second pipeline 212. The nozzle body 221 and the outer cover 222 are coaxially arranged, and the nozzle body 221 includes an injection portion 2211 arranged in a trumpet shape with a larger inner end and a smaller outer end. The nozzle body 221 is provided with an injection channel 2212 connected to the first pipeline 211. A flow channel is formed between the outer cover 222 and the injection portion 2211, and the flow channel is connected to the second pipeline 212.

[0030] In the technical solution of the present utility model, when there are more than two injection assemblies 22, the injection assemblies 22 are evenly distributed around the body 21, but their height positions can be consistent or can be arranged in different heights (in different horizontal planes).

[0031] This embodiment is further configured as follows: an exhaust member 23 is provided between the outer cover 222 and the spraying part 2211 , the exhaust member 23 is sleeved outside the water spraying part, the outer cover 222 is sleeved on the outer wall of the exhaust member 23 , and the flow channel is composed of a plurality of inclined grooves 231 evenly distributed on the outer periphery of the exhaust member 23 .

[0032] This embodiment further configures: the inner wall of the exhaust member 23 is adapted to the injection portion 2211 , the cross-section of the outer wall of the exhaust member 23 is trapezoidal in shape with a larger inner end and a smaller outer end, and the cross-sectional area of ​​the flow channel is 65%-80% of the cross-sectional area of ​​the exhaust member 23 .

[0033] This embodiment further provides that: the center line of the inclined groove 231 is a curve.

[0034] This embodiment further provides that: the outer end cross-section of the inclined groove 231 is smaller than the inner end cross-section.

[0035] The present embodiment is further provided with: a mounting cavity 2213 is provided at the other end of the nozzle body 221 relative to the injection portion 2211, an elastic diverter 24 is provided in the mounting cavity 2213, the elastic diverter 24 comprises a first connecting portion 241 and an extension portion 242, the first connecting portion 241 is interference connected with the mounting cavity 2213, the inner end of the extension portion 242 is provided in the first tube body, a plurality of diverter channels 243 for connecting the first pipeline 211 with the injection channel 2212 are provided in the elastic diverter 24, the injection channel 2212 comprises a first injection section 22121 connected to the diverter channel 243 and a second injection section 22122 provided in the injection portion 2211, the first injection section 22121 is provided in a bell-shaped configuration with a larger inner end and a smaller outer end, the second injection section 22122 is adapted to the inner diameter of the outer end of the first injection section 22121 and is provided in a straight line.

[0036] This embodiment is further configured as follows: a "horizontal T-shaped" mounting groove 2121 is provided at a position of the second pipe 212 corresponding to the injection body 21, the outer end diameter of the mounting groove 2121 is larger than the inner end diameter, the outer cover 222 includes a second connection portion 2221 threadedly connected to the inner end of the mounting groove 2121 and a third connection portion 2222 arranged in the outer end of the mounting groove 2121, the third connection portion 2222 is provided with an external thread for threaded connection with a dust cover, and the diameter of the dust cover is adapted to the inner diameter of the outer end of the mounting groove 2121.

[0037] The above-mentioned “between” does not only refer to directions and positions, but also includes the meaning of the interaction between different parts. The above-mentioned “upper and lower” are only relative descriptions for the convenience of description and understanding, and other possibilities are not excluded.

[0038] Although the present invention uses more terms such as the injection tube 1, the inner tube 11, the outer tube 12, the injection mechanism 2, the body 21, the first pipe 211, the second pipe 212, the installation groove 2121, the injection assembly 22, the nozzle body 221, the injection part 2211, the injection channel 2212, the first injection section 22121, the second injection section 22122, the installation cavity 2213, the outer cover 222, the second connection part 2221, the third connection part 2222, the exhaust member 23, the inclined groove 231, the elastic diverter 24, the first connection part 241, the extension part 242, the diverter channel 243, etc., the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A high-pressure jetting solidification soil mixing construction equipment, characterized in that: It includes an injection tube and a control device for controlling the injection tube to move up and down, rotate and swing, the injection tube includes an inner tube for injecting the injection material and an outer tube for supplying water and air, the lower end of the injection tube is provided with a spray mechanism, the spray mechanism includes a main body, the main body includes a first pipe axially connected to the inner tube and a second pipe axially connected to the outer tube, more than one spray assembly is provided on the main body, the spray assembly is connected to the first pipe and the second pipe, the spray assembly includes a nozzle body detachably connected to the first pipe and an outer cover detachably connected to the second pipe, the nozzle body is coaxially arranged with the outer cover, the nozzle body includes a spray part arranged in a trumpet shape with a larger inner end and a smaller outer end, an injection channel connected to the first pipe is provided in the nozzle body, a flow channel is formed between the outer cover and the injection part, and the flow channel is connected to the second pipe.

2. A high-pressure jetting soil mixing construction equipment according to claim 1, characterized in that: An exhaust member is arranged between the outer cover and the spraying part. The exhaust member is sleeved outside the water spraying part. The outer cover is sleeved on the outer wall of the exhaust member. The flow channel is composed of a plurality of inclined grooves evenly distributed on the outer periphery of the exhaust member.

3. A high-pressure jetting soil mixing construction equipment according to claim 2, characterized in that: The inner wall of the exhaust member is matched with the injection part, the cross-section of the outer wall of the exhaust member is trapezoidal in shape with a larger inner end and a smaller outer end, and the cross-sectional area of ​​the flow channel is 65%-80% of the cross-sectional area of ​​the exhaust member.

4. The high-pressure jetting soil mixing construction equipment according to claim 3 is characterized in that: The center line of the inclined slot is a curve.

5. The high-pressure jetting soil mixing construction equipment according to claim 3 is characterized in that: The outer end section of the inclined groove is smaller than the inner end section.

6. The high-pressure jetting soil mixing construction equipment according to claim 1 is characterized in that: A mounting cavity is provided at the other end of the nozzle body relative to the injection portion, and an elastic diverter is provided in the mounting cavity. The elastic diverter includes a first connecting portion and an extension portion. The first connecting portion is interference-connected with the mounting cavity, and the inner end of the extension portion is provided in the first tube body. A plurality of diverter channels for connecting the first pipeline and the injection channel are provided in the elastic diverter. The injection channel includes a first injection section connected to the diverter channel and a second injection section provided in the injection portion. The first injection section is arranged in a bell-shaped shape with a larger inner end and a smaller outer end, and the second injection section is adapted to the inner diameter of the outer end of the first injection section and is arranged in a straight line.

7. The high-pressure jetting soil mixing construction equipment according to claim 6 is characterized in that: A "horizontal T-shaped" mounting groove is arranged at a position of the second pipe corresponding to the injection body, and the outer end diameter of the mounting groove is larger than the inner end diameter. The outer cover includes a second connecting portion threadedly connected to the inner end of the mounting groove and a third connecting portion arranged in the outer end of the mounting groove, and the third connecting portion is provided with an external thread for threaded connection with a dust cover, and the diameter of the dust cover is adapted to the inner diameter of the outer end of the mounting groove.

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