CN221372162U - Cement mixing pile machine - Google Patents

Abstract

The utility model belongs to the technical field of mixing pile machines, and discloses a cement mixing pile machine which comprises a frame, a main drill rod, a mixing assembly, a rotating mechanism and a lifting mechanism. The main drill rod is arranged on the frame and comprises an outer drill rod and an inner drill rod, the inner drill rod is coaxially arranged inside the outer drill rod in a penetrating mode, the drill bit end of the inner drill rod penetrates out of the outer drill rod, a powder spraying pipe, a slurry spraying pipe and a gas spraying pipe are arranged on the main drill rod, the powder outlet end of the powder spraying pipe is arranged on the penetrating end of the inner drill rod, the slurry outlet end of the slurry spraying pipe and the gas outlet end of the gas spraying pipe are arranged on the drill bit end, the stirring assembly is arranged on the outer drill rod and/or the inner drill rod, the rotating mechanism can drive the outer drill rod and the inner drill rod to rotate around the rotating axis respectively, and the lifting mechanism can drive the main drill rod to lift. Through the arrangement, the cement mixing pile machine can jet different mediums aiming at different mixing areas, and the pile forming effect is better.

Description

Cement mixing pile machine

Technical Field

The utility model relates to the technical field of mixing pile machines, in particular to a cement mixing pile machine.

Background

The cement stirring method is a method for reinforcing a saturated soft clay foundation, so that soft soil is hardened into a high-quality foundation with integrity, water stability and certain strength. Cement mixing piles are classified into wet and dry methods according to the state of cement injection. The wet method is mainly to cement paste, and is uniformly stirred, so that the repeated stirring is easy, and the hardening time of cement soil is long; the dry method is mainly based on cement dry powder, the hardening time of cement soil is short, but the stirring uniformity is poor, and the full-range repeated stirring is difficult.

For river estuary areas or hydraulic reclamation areas, the flowing plastic sludge has thicker geology and clay or sand layer interlayer, and the traditional single-form cement paste mixing pile or powder spraying mixing pile can not comprehensively and effectively solve the problem of soil layer reinforcement. In the construction process, when the water content of the soil is too high, the cement mixing pile is influenced by long-term liquid pressure after being poured, so that the pile is not formed; when sand layers or clay interlayers exist in the sludge, the traditional stirring pile cannot effectively penetrate, so that the construction efficiency is greatly reduced.

Disclosure of utility model

The utility model aims to provide a cement mixing pile machine which can spray different mediums aiming at different mixing areas and has better pile forming effect.

To achieve the purpose, the utility model adopts the following technical scheme:

a cement mixing pile machine, comprising:

A frame;

The main drill rod is arranged on the frame and comprises an outer drill rod and an inner drill rod, the inner drill rod is coaxially arranged inside the outer drill rod in a penetrating mode, a drill bit end of the inner drill rod penetrates out of the outer drill rod, a powder spraying pipe, a slurry spraying pipe and a gas spraying pipe are arranged on the main drill rod, a powder outlet end of the powder spraying pipe is arranged on a penetrating end of the inner drill rod, and a slurry outlet end of the slurry spraying pipe and a gas outlet end of the gas spraying pipe are both arranged on the drill bit end;

The stirring assembly is arranged on the outer drill rod and/or the inner drill rod;

The rotating mechanism can drive the outer drill rod and the inner drill rod to rotate around the rotating axis respectively;

and the lifting mechanism can drive the main drill rod to lift.

Optionally, the rotating mechanism comprises a rotating driver and a transmission assembly, wherein an output end of the rotating driver is connected with the outer drill rod and the inner drill rod through the transmission assembly, and the outer drill rod and the inner drill rod can be driven to rotate around the rotating axis towards opposite directions respectively.

Optionally, the transmission subassembly includes box, pivot, driving gear and driven gear, the pivot with driven gear rotate respectively set up in on the box, be equipped with first gear on the outer drilling rod, be equipped with the second gear on the inner drilling rod, the pivot connect in rotate the output of driver, and connect in the driving gear, the driving gear meshing connect in driven gear with first gear, driven gear meshing connect in the second gear, rotate the driver can drive the pivot rotates around self axis, the pivot rotates and drives the driving gear rotates, the driving gear rotates and drives first gear with driven gear rotates around self axis respectively, first gear rotates and drives outer drilling rod rotates, driven gear rotates and drives the second gear rotates, the second gear rotates and drives inner drilling rod rotates.

Optionally, the powder outlet end of the powder spraying pipe is arranged on the circumferential outer wall of the inner drill rod.

Optionally, the stirring subassembly includes a plurality of blades, and a plurality of the blade is followed the direction interval setting of axis of rotation, and adjacent two the extending direction of blade is the contained angle setting.

Optionally, an extension end is provided at an end of the inner drill rod facing the drill bit end, the extension end is exposed to the outer drill rod, and the stirring assembly is disposed on the extension end and an outer wall of the outer drill rod.

Optionally, the elevating system includes lift driver and elevating platform, elevating platform sliding connection in the frame, main drilling rod with slewing mechanism install in on the elevating platform, lift driver's output connect in the elevating platform can drive the elevating platform slides along vertical direction.

Optionally, the cement mixing pile machine further comprises a sealing assembly, wherein the sealing assembly is arranged at one end of the outer drill rod, which faces the drill bit end, and is used for sealing a gap between the outer drill rod and the inner drill rod.

Optionally, the cement mixing pile machine further comprises an electric control mechanism, and the powder spraying pipe, the slurry spraying pipe and the air spraying pipe are respectively communicated with the powder tank, the pulping equipment and the air compressor in a one-to-one correspondence manner through the electric control mechanism.

Optionally, the main drill rod, the stirring assembly and the rotating mechanism are a group of stirring mechanisms, the stirring mechanisms are provided with a plurality of groups, one stirring mechanism is provided with a plurality of groups of stirring mechanisms on the rack, and the lifting mechanism can drive the plurality of groups of stirring mechanisms to lift.

The beneficial effects are that:

The utility model provides a cement mixing pile machine which comprises a frame, a main drill rod, a mixing assembly, a rotating mechanism and a lifting mechanism. The main drill rod is arranged on the frame and comprises an outer drill rod and an inner drill rod, the inner drill rod is coaxially arranged inside the outer drill rod in a penetrating mode, and the drill bit end of the inner drill rod penetrates out of the outer drill rod so as to reach a deeper stirring area, and mixing of cement and soil is facilitated. The main drill rod is provided with a powder spraying pipe, a slurry spraying pipe and an air spraying pipe, the powder outlet end of the powder spraying pipe is arranged at the penetrating end of the inner drill rod, and when the water content of the stirring area is too large, cement dry powder is sprayed through the penetrating part of the inner drill rod from the outer drill rod, so that the quick pile forming is facilitated. The slurry outlet end of the slurry spraying pipe and the gas outlet end of the gas spraying pipe are both arranged on the drill bit end, when the stirring area of the drill bit end contains a sand layer or a clay layer, the gas is sprayed through the gas outlet end to disturb surrounding soil, so that the soil strength is reduced, the stirring effect is improved, the soil can be solidified through slurry spraying at the slurry outlet end, and piling is facilitated. The stirring assembly is arranged on the outer drill rod and/or the inner drill rod, the outer drill rod and the inner drill rod can be driven to rotate around the rotation axis through the rotation mechanism, and then the stirring assembly is driven to stir surrounding soil, so that the soil and cement are fully mixed, the stirring effect is further improved, and piling is accelerated. The lifting mechanism can drive the main drill rod to lift, and different mediums can be sprayed in the process of penetrating and lifting the main drill rod downwards so as to achieve the optimal cement treatment effect. Through the arrangement, the cement mixing pile machine can jet different mediums aiming at different mixing areas, and the pile forming effect is better.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a cement mixing pile machine according to an embodiment of the present utility model;

Fig. 2 is a schematic diagram of a part of a cement mixing pile machine according to an embodiment of the present utility model;

Fig. 3 is a schematic diagram of a part of a cement mixing pile machine according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a plurality of main drill pipe synchronization operations provided by an embodiment of the present utility model;

FIG. 5 is a schematic illustration of a transmission assembly provided by an embodiment of the present utility model;

fig. 6 is a cross-sectional view of a transmission assembly provided by an embodiment of the present utility model.

In the figure:

1. A frame;

2. A main drill pipe; 21. an outer drill rod; 22. an inner drill rod; 221. a drill bit end; 222. an elongated end; 23. a powder spraying pipe; 231. a powder outlet end; 24. a guniting pipe; 241. a pulp outlet end; 25. a gas lance; 251. an air outlet end;

3. a stirring assembly; 31. a blade;

4. A rotating mechanism; 41. a rotary driver; 42. a transmission assembly; 421. a case; 422. a rotating shaft; 423. a drive gear; 424. a driven gear; 425. a first gear; 426. a second gear;

5. A lifting mechanism; 51. a lifting driver; 52. a lifting table;

6. A seal assembly;

7. An electric control mechanism.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 6, the present embodiment provides a cement mixing pile machine, which comprises a frame 1, a main drill rod 2, a mixing assembly 3, a rotating mechanism 4 and a lifting mechanism 5. The main drill rod 2 is arranged on the frame 1 and comprises an outer drill rod 21 and an inner drill rod 22, the inner drill rod 22 is coaxially arranged inside the outer drill rod 21 in a penetrating mode, a drill bit end 221 of the inner drill rod 22 penetrates out of the outer drill rod 21, a powder spraying pipe 23, a slurry spraying pipe 24 and a gas spraying pipe 25 are arranged on the main drill rod 2, a powder outlet end 231 of the powder spraying pipe 23 is arranged on a penetrating end of the inner drill rod 22, a slurry outlet end 241 of the slurry spraying pipe 24 and a gas outlet end 251 of the gas spraying pipe 25 are both arranged on the drill bit end 221, the stirring assembly 3 is arranged on the outer drill rod 21 and/or the inner drill rod 22, the rotating mechanism 4 can drive the outer drill rod 21 and the inner drill rod 22 to rotate around rotating axes respectively, and the lifting mechanism 5 can drive the main drill rod 2 to lift.

In this embodiment, the main drill rod 2 is disposed on the frame 1, and includes an outer drill rod 21 and an inner drill rod 22, where the inner drill rod 22 is coaxially disposed inside the outer drill rod 21, and penetrates out of the outer drill rod 21 through a drill bit end 221 of the inner drill rod 22, so as to reach a deeper stirring area, which is beneficial to mixing cement and soil, and the portion of the inner drill rod 22 penetrating out of the outer drill rod 21 is the penetrating end of the inner drill rod 22. The main drill rod 2 is provided with a powder spraying pipe 23, a slurry spraying pipe 24 and an air spraying pipe 25, the powder outlet end 231 of the powder spraying pipe 23 is arranged at the penetrating end of the inner drill rod 22, and when the water content of the stirring area is too large, cement dry powder is sprayed from the penetrating part of the outer drill rod 21 through the inner drill rod 22, so that the quick pile forming is facilitated. The slurry outlet end 241 of the slurry spraying pipe 24 and the gas outlet end 251 of the gas spraying pipe 25 are both arranged on the drill bit end 221, when the stirring area of the drill bit end 221 contains a sand layer or a clay layer, the gas is sprayed through the gas outlet end 251 to disturb surrounding soil, the soil strength is reduced, the stirring effect is improved, the slurry is sprayed through the slurry outlet end 241, the soil can be solidified, and piling is facilitated. The stirring assembly 3 is arranged on the outer drill rod 21 and/or the inner drill rod 22, and the outer drill rod 21 and the inner drill rod 22 can be driven to rotate around the rotation axis respectively through the rotation mechanism 4, so that the stirring assembly 3 is driven to stir surrounding soil, the soil and cement are fully mixed, the stirring effect is further improved, and piling is accelerated. The lifting mechanism 5 can drive the main drill rod 2 to lift, and different mediums can be sprayed in the process of penetrating and lifting the main drill rod 2, so that the optimal cement treatment effect is achieved. Through the arrangement, the cement mixing pile machine can jet different mediums aiming at different mixing areas, and the pile forming effect is better.

It should be noted that the rotation axis of this embodiment is the own axes of the outer drill rod 21 and the inner drill rod 22. In addition, the stirring assembly 3 of the embodiment is arranged on the outer drill rod 21 and the inner drill rod 22, and the stirring assembly 3 is driven to rotate around the rotation axis through the rotation of the outer drill rod 21 and the inner drill rod 22, so that stirring of surrounding soil is achieved.

Specifically, as shown in fig. 1 and 2, the rotation mechanism 4 includes a rotation driver 41 and a transmission assembly 42, and the output end of the rotation driver 41 is connected to the outer drill rod 21 and the inner drill rod 22 through the transmission assembly 42, so that the outer drill rod 21 and the inner drill rod 22 can be driven to rotate around the rotation axes in opposite directions respectively, so that stirring is more uniform, slurry overflow is avoided, and pile strength and pile depth are remarkably improved.

More specifically, in the present embodiment, the rotary actuator 41 includes a motor, preferably a 132kw motor, to ensure smoother driving of the outer drill rod 21 and the inner drill rod 22. The transmission assembly 42 comprises a bi-directional gear box, and an output shaft of the motor is connected to the outer drill rod 21 and the inner drill rod 22 through the bi-directional gear box, so that the outer drill rod 21 and the inner drill rod 22 are driven to respectively and coaxially rotate in opposite directions, the slurry returning amount is controlled, and the working efficiency is improved. In other embodiments, the coaxial reverse rotation of the outer drill rod 21 and the inner drill rod 22 may be implemented by a hydraulic driving device or an air driving device, etc., and it is clear to a person skilled in the art how to implement the method, and the details are not repeated here.

Specifically, as shown in fig. 1-6, the transmission assembly 42 includes a box 421, a rotating shaft 422, a driving gear 423 and a driven gear 424, where the rotating shaft 422 and the driven gear 424 are respectively rotatably disposed on the box 421, a first gear 425 is disposed on the outer drill rod 21, a second gear 426 is disposed on the inner drill rod 22, the rotating shaft 422 is connected to an output end of the rotation driver 41 and to the driving gear 423, the driving gear 423 is engaged and connected to the driven gear 424 and the first gear 425, the driven gear 424 is engaged and connected to the second gear 426, the rotation driver 41 can drive the rotating shaft 422 to rotate around its axis, the rotating shaft 422 rotates to drive the driving gear 423, the driving gear 423 rotates to drive the first gear 425 and the driven gear 424 to rotate around its axis, the first gear 425 rotates to drive the outer drill rod 21, the driven gear 424 rotates to drive the second gear 426 to rotate, the second gear 426 rotates to drive the inner drill rod 22, through the above arrangement, and further realize coaxial reverse rotation of the outer drill rod 21 and the inner drill rod 22, and through the transmission of the above components, the driving force can be effectively and stably transmitted, the stability of the outer drill rod 21 and the inner drill rod 22 is ensured, and the safety is improved.

More specifically, as shown in fig. 6, in the present embodiment, two driving gears 423 are disposed on the rotating shaft 422 at a coaxial interval, and are respectively engaged with and connected to the first gear 425 and the driven gear 424 in a one-to-one correspondence manner, the rotation of the rotating shaft 422 can drive the two driving gears 423 to simultaneously rotate, and further drive the first gear 425 and the driven gear 424 to rotate respectively, so that the reverse rotation of the outer drill rod 21 and the inner drill rod 22 can be realized.

Specifically, as shown in fig. 1-3, in this embodiment, the powder outlet end 231 of the powder spraying pipe 23 is disposed on the circumferential outer wall of the inner drill pipe 22, and when the inner drill pipe 22 is lifted and rotated, gas and cement dry powder are sprayed through the powder outlet end 231 disposed on the circumferential side wall of the inner drill pipe 22, so that the soil around the stirring pile can be uniformly sprayed, cement powder and the soil can be fully mixed to form a uniform cement-soil mixture, stability and bearing capacity of the soil structure are enhanced, pile forming quality of the cement stirring pile is ensured, and strength and stability of the cement stirring pile are improved. In other embodiments, the powder outlet end 231 of the powder spraying pipe 23 is disposed at the end of the inner drill pipe 22, and the powder spraying operation on the surrounding soil body is achieved through the up-and-down movement and the rotation of the inner drill pipe 22, i.e. the specific setting position of the powder outlet end 231 is not excessively limited, so long as the above function can be achieved.

Specifically, as shown in fig. 3, the stirring assembly 3 includes a plurality of blades 31, the plurality of blades 31 are arranged along the direction interval of the rotation axis, the extending directions of two adjacent blades 31 are arranged at an included angle, so that the arrangement can ensure the thorough mixing of the cement paste and other mediums and the soil mass, and ensure the piling effect. In this embodiment, the extending directions of the adjacent two blades 31 are perpendicular to each other to ensure sufficient stirring. In other embodiments, the extending directions of the adjacent two blades 31 may be 30 degrees, 60 degrees, etc., which are not limited herein.

More specifically, the stirring assembly 3 further comprises a reinforcing rib connected to the blade 31 and the main drill rod 2 to improve the connection strength between the blade 31 and the main drill rod 2 and prevent the blade 31 from being damaged in the process of rotating and stirring. Further, the blades 31 of the present embodiment are disposed on the outer drill rod 21 and the inner drill rod 22, two ends of a part of the reinforcing ribs are respectively connected to the outer drill rod 21 and the blades 31, and two ends of the rest of the reinforcing ribs are respectively connected to the inner drill rod 22 and the blades 31. Further, grooves are formed in the blades 31 to increase the contact area between the blades 31 and the soil body, and improve the stirring effect.

More specifically, as shown in fig. 3, an extension end 222 is disposed at one end of the inner drill rod 22 facing the drill tip 221, the extension end 222 is exposed out of the outer drill rod 21, and extends out of the outer drill rod 21 through the inner drill rod 22, so as to meet construction requirements, ensure that cement paste can be fully mixed with soil, and meanwhile, by means of the extension end 222, work efficiency can be improved, and stirring depth can be increased. The stirring subassembly 3 sets up on the outer wall of extension end 222 and outer drilling rod 21, through the rotation of outer drilling rod 21 and interior drilling rod 22, and then drives stirring subassembly 3 and rotate to realize the intensive mixing to soil, moreover, like this the setting can avoid interior drilling rod 22 and outer drilling rod 21 on blade 31 take place to interfere and influence normal operation. Further, as shown in fig. 3, in the present embodiment, three blades 31 are provided on the outer drill rod 21, three blades 31 are also provided on the extension end 222, and two adjacent blades 31 are perpendicular to each other, so as to ensure more sufficient stirring. In other embodiments, the number of blades 31 may be 4, 6, 8, 10 … …, i.e., the specific number of blades 31 is not limited, as long as the above-described functional effects can be achieved.

Specifically, as shown in fig. 1 and 2, the lifting mechanism 5 includes a lifting driver 51 and a lifting table 52, the lifting table 52 is slidably connected to the frame 1, the main drill rod 2 and the rotating mechanism 4 are mounted on the lifting table 52, the output end of the lifting driver 51 is connected to the lifting table 52, the lifting table 52 can be driven to slide along the vertical direction, and then the main drill rod 2 and the rotating mechanism 4 are driven to move up and down together, so that the main drill rod 2 is convenient to run down and lift, and the operation of operators is convenient.

More specifically, as shown in fig. 2, a slider is provided on the lifting platform 52, a slide rail extending in the vertical direction is provided on the frame 1, and the slider is slidably connected in the slide rail, so as to realize the up-and-down sliding of the lifting platform 52 on the frame 1. Further, in order to reduce manpower and improve working efficiency, the lifting driver 51 is a hydraulic lifter or a hoist, and an output end of the lifting driver 51 is connected to the lifting table 52 through a lifting rope and a sling, so as to drive the lifting table 52 to slide up and down.

Specifically, as shown in fig. 3, the cement mixing pile machine further includes a sealing assembly 6, the sealing assembly 6 is disposed at one end of the outer drill rod 21 facing the drill bit end 221, for sealing a gap between the outer drill rod 21 and the inner drill rod 22, preventing leakage of cement paste or other medium from the gap, and the sealing assembly 6 can also protect the outer drill rod 21 and the inner drill rod 22, preventing foreign matters from entering the inside thereof to affect normal operation.

More specifically, in this embodiment, the seal assembly 6 includes a seal seat, a bearing, a seal ring and a seal pressing cover, two ends of the seal seat are respectively connected to the outer drill rod 21 and the inner drill rod 22, the bearing is disposed in the seal seat to reduce friction resistance when the outer drill rod 21 and the inner drill rod 22 move, the seal ring is clamped between the bearing and the seal pressing cover to avoid that media such as soil and slurry enter through a gap between the outer drill rod 21 and the inner drill rod 22 to affect normal operation, and the seal pressing cover is disposed on the seal seat to press the bearing and the seal ring and improve tightness of the seal assembly 6.

Specifically, as shown in fig. 1-3, the cement mixing pile machine further comprises an electric control mechanism 7, and the powder spraying pipe 23, the slurry spraying pipe 24 and the air spraying pipe 25 are respectively communicated with the powder tank, the slurry making equipment and the air compressor in a one-to-one correspondence manner through the electric control mechanism 7, so that the automation degree is improved, and the electric control mechanism 7 is used for accurately controlling powder spraying, slurry spraying and air spraying, so that the construction quality is ensured. Meanwhile, according to different geological conditions and construction requirements, parameters of the electric control mechanism 7 can be adjusted, so that powder spraying, slurry spraying and air spraying are more suitable for actual conditions, different media are sprayed to different stirring areas, and the piling effect is better.

Specifically, as shown in fig. 1-4, the main drill rod 2, the stirring assembly 3 and the rotating mechanism 4 are a group of stirring mechanisms, a plurality of groups of stirring mechanisms are arranged on one frame 1, the lifting mechanism 5 can drive the plurality of groups of stirring mechanisms to lift, and therefore a plurality of groups of piles are formed, the operation efficiency is improved, and the construction quality is guaranteed.

Specifically, the main drill rod 2 further comprises bearings for reducing frictional resistance between the outer drill rod 21 and the inner drill rod 22, such that the outer drill rod 21 and the inner drill rod 22 can move about the rotational axis Shu Shunchang, respectively.

The concrete working procedure of the cement mixing pile machine of this embodiment is described below:

Setting out a pile position; positioning a cement stirring pile machine; checking and adjusting all the components; the rotating mechanism 4 drives the outer drill rod 21 and the inner drill rod 22 to rotate clockwise and anticlockwise respectively, the lifting mechanism 5 drives the main drill rod 2 to descend until reaching the designed depth, the electric control mechanism 7 controls the guniting pipe 24 to guniting in the process of downwards penetrating the main drill rod 2, and when the main drill rod 2 enters a sand layer or a clay interlayer, the electric control mechanism 7 controls the air injection pipe 25 to jet air; when the main drill rod 2 needs to be lifted, the rotating mechanism 4 drives the outer drill rod 21 and the inner drill rod 22 to rotate around the anticlockwise direction and the clockwise direction respectively, and the electric control mechanism 7 controls the powder spraying pipe 23 to spray powder; repeatedly stirring and lifting; and (5) finishing piling; and constructing the next pile.

The cement mixing pile construction method can be used for spraying different mediums to different mixing areas, and the pile forming effect is better.

The construction method comprises the following specific steps:

step one, surveying an engineering area before construction, and determining a soil layer structure at the position of the engineering and physical and mechanical indexes of each layer of soil.

And step two, performing a cement soil indoor mixing ratio test on the soil layers, and determining a reasonable cement mixing ratio of each soil layer.

And thirdly, carrying out typical experimental construction on site, and determining the optimal construction process parameters of different cement mixing piles.

And fourthly, setting control programs of powder spraying, slurry spraying and air spraying according to the optimal construction process parameters obtained by the on-site pile test result.

And fifthly, determining pile positions in the soft soil foundation treatment area, and positioning the cement mixing pile machine.

Step six, the main drill rod 2 opens a slurry outlet end 241 in the process of running through the flowing plastic-shaped silt stratum; when entering the sand layer or clay sandwich, the air outlet end 251 is opened; when the bit 221 penetrates into the pile bottom, the rotation direction of the blade 31 is switched; during lifting, the powder discharge end 231 is opened.

In the sixth step, the cement paste and the soil body can be fully mixed through the paste outlet end 241 for spraying paste, so that a uniform cement-soil mixture is formed, and the strength and stability of the soil body are improved. The construction process parameters of the cement paste spraying and stirring pile are as follows: the cement mixing amount is 14% -22% of the mass of the reinforced wet soil, the cement ratio is 0.5-1.2, the drilling speed is 0.8m/min-1.2m/min, the lifting speed is 0.4m/min-0.6m/min, the rotating speed is 30r/min-60r/min, the slurry spraying pressure is 15MPa-20MPa during drilling, and the outer drill rod 21 and the inner drill rod 22 rotate clockwise and anticlockwise respectively; the construction process parameters of the cement powder spraying stirring pile are as follows: the cement mixing amount is 16% -22% of the mass of the reinforced wet soil, the drilling speed is 0.8m/min-1.2m/min, the lifting speed is 0.4m/min-0.6m/min, the rotating speed is 30r/min-50r/min, the pressure of the cement powder during drilling is 0.5MPa-0.7MPa, and the outer drill rod 21 and the inner drill rod 22 rotate around anticlockwise and clockwise respectively.

And seventh, when each cement mixing pile is driven, controlling the operation parameters of the powder spraying pipe 23, the slurry spraying pipe 24 and the air spraying pipe 25 according to different soil layer structures, and performing seamless connection of the mixing piles or setting a superposition section.

In the seventh step, the operation parameters include the consumption, pressure, speed and time of powder spraying, slurry spraying and air spraying, and the strength and stability of the whole cement mixing pile can be improved by seamless connection of two adjacent mixing piles or setting a certain overlapping section, so that the discontinuous condition of the pile body is avoided.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Cement stirring stake machine, its characterized in that includes:

A frame (1);

The main drill rod (2) is arranged on the frame (1) and comprises an outer drill rod (21) and an inner drill rod (22), the inner drill rod (22) is coaxially arranged inside the outer drill rod (21) in a penetrating mode, a drill bit end (221) of the inner drill rod (22) penetrates out of the outer drill rod (21), a powder spraying pipe (23), a slurry spraying pipe (24) and a gas spraying pipe (25) are arranged on the main drill rod (2), a powder outlet end (231) of the powder spraying pipe (23) is arranged on a penetrating end of the inner drill rod (22), and a slurry outlet end (241) of the slurry spraying pipe (24) and a gas outlet end (251) of the gas spraying pipe (25) are both arranged on the drill bit end (221);

The stirring assembly (3) is arranged on the outer drill rod (21) and/or the inner drill rod (22);

The rotating mechanism (4) can drive the outer drill rod (21) and the inner drill rod (22) to rotate around the rotating shaft respectively;

and the lifting mechanism (5) can drive the main drill rod (2) to lift.

2. Cement mixing pile machine according to claim 1, characterised in that the rotation mechanism (4) comprises a rotation drive (41) and a transmission assembly (42), the output end of the rotation drive (41) being connected to the outer drill rod (21) and the inner drill rod (22) via the transmission assembly (42) and being capable of driving the outer drill rod (21) and the inner drill rod (22) to rotate about the rotation axis in opposite directions, respectively.

3. The cement mixing pile machine according to claim 2, wherein the transmission assembly (42) comprises a box (421), a rotating shaft (422), a driving gear (423) and a driven gear (424), the rotating shaft (422) and the driven gear (424) are respectively rotatably arranged on the box (421), a first gear (425) is arranged on the outer drill rod (21), a second gear (426) is arranged on the inner drill rod (22), the rotating shaft (422) is connected to the output end of the rotary driver (41) and is connected to the driving gear (423), the driving gear (423) is in meshed connection with the driven gear (424) and the first gear (425), the driven gear (424) is in meshed connection with the second gear (426), the rotary driver (41) can drive the rotating shaft (422) to rotate around the self axis, the rotating shaft (422) drives the driving gear (423) to rotate, the driving gear (423) drives the first gear (424) and the driven gear (424) to rotate around the self axis, and the driven gear (426) rotates around the first gear (426) respectively, the second gear (426) rotates to drive the inner drill rod (22) to rotate.

4. Cement mixing pile machine according to claim 1, characterised in that the powder outlet end (231) of the powder pipe (23) is arranged on the circumferential outer wall of the inner drill rod (22).

5. Cement mixing pile machine according to claim 1, characterised in that the mixing assembly (3) comprises a plurality of blades (31), a plurality of the blades (31) being arranged at intervals in the direction of the axis of rotation, the extension direction of two adjacent blades (31) being arranged at an angle.

6. Cement mixing pile machine according to claim 1, characterised in that the end of the inner drill rod (22) facing the drill bit end (221) is provided with an elongated end (222), the elongated end (222) being exposed to the outer drill rod (21), the mixing assembly (3) being arranged on the outer walls of the elongated end (222) and the outer drill rod (21).

7. Cement mixing pile machine according to claim 1, characterized in that the lifting mechanism (5) comprises a lifting drive (51) and a lifting table (52), the lifting table (52) is slidingly connected to the frame (1), the main drill rod (2) and the rotating mechanism (4) are mounted on the lifting table (52), the output end of the lifting drive (51) is connected to the lifting table (52) and can drive the lifting table (52) to slide in the vertical direction.

8. Cement mixer pile machine according to claim 1, characterized in that the cement mixer pile machine further comprises a sealing assembly (6), which sealing assembly (6) is arranged at the end of the outer drill rod (21) facing the drill bit end (221) for sealing the gap between the outer drill rod (21) and the inner drill rod (22).

9. Cement mixing pile machine according to claim 1, characterized in that it further comprises an electric control mechanism (7), said blast pipe (23), said blast pipe (24) and said blast pipe (25) being in one-to-one correspondence with the blast tank, the pulping device and the air compressor, respectively, by means of said electric control mechanism (7).

10. Cement mixing pile machine according to any one of claims 1-9, characterised in that the main drill rod (2), the mixing assembly (3) and the rotating mechanism (4) are a set of mixing mechanisms, the mixing mechanisms are provided with a plurality of sets, one frame (1) is provided with a plurality of sets of mixing mechanisms, and the lifting mechanism (5) can drive a plurality of sets of mixing mechanisms to lift.