CN216689372U

CN216689372U - Deep agitating unit of soil body perturbation

Info

Publication number: CN216689372U
Application number: CN202122488940.8U
Authority: CN
Inventors: 朱祎坤; 俞峰; 陈鑫
Original assignee: Zhejiang Sci Tech University ZSTU
Current assignee: Zhejiang Sci Tech University ZSTU
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-06-07
Anticipated expiration: 2031-10-15

Abstract

The utility model discloses a soil body micro-disturbance deep-layer stirring device which comprises a construction machine, a steel sleeve and a micro-disturbance deep-layer stirring drill bit, wherein the steel sleeve and the micro-disturbance deep-layer stirring drill bit can be respectively connected with the construction machine, the micro-disturbance deep-layer stirring drill bit is arranged inside the steel sleeve, an external fixing piece which can be matched and fixed with an external fixing device is arranged on the outer side of the steel sleeve, and a connecting part connected with the construction machine is detachably arranged at the upper end of the steel sleeve. The method has the advantages that the approach and construction disturbance of common steel sleeve construction machinery can be saved, meanwhile, the construction cost can be saved by adopting a dual-purpose mode, and the construction efficiency is improved; prevent the mixed slurry from producing mud balls and slurry overflow, improve the stirring effect and enhance the soil body reinforcing capacity.

Description

Deep agitating unit of soil body perturbation

Technical Field

The application relates to the technical field of soil body micro-disturbance deep layer construction, and especially relates to a soil body micro-disturbance deep layer stirring device.

Background

The scarcity of urban land resources causes that urban development cannot be expanded without limit, and how to efficiently utilize urban space to meet the requirement of daily life work and study of people becomes a problem to be solved urgently in the construction industry. The increase of buildings and structures in the vicinity of the existing buildings in the urban space is one of the important ways for expanding the urban space at present. However, existing buildings dense in cities have strict requirements on foundation pit deformation: the deep lateral deformation of the soil outside the pit meets the first-level protection level, and the cracks (if any) of buildings adjacent to the deep lateral deformation of the soil outside the pit and the cracks (if any) of the ground surface outside the foundation pit meet the first-level, second-level and third-level protection levels; the absolute settling volume and the horizontal displacement volume of the subway structure facility are less than or equal to 20 mm; the peak speed caused by the vibration generated by piling vibration and explosion to the tunnel is less than or equal to 2.5cm/s, and the like. The area of the newly-built foundation pit is limited by various deformation control requirements, so that the actual use area reduction of the finally-built (constructed) building cannot meet the requirement of urban space expansion. The deep mixing pile has the advantages that in the pile side soft soil reinforcing process of foundation pit excavation, the pressure strength of passive soil outside the foundation pit can be increased, the lateral extrusion of the foundation is reduced, the influence on the surrounding original buildings is reduced, the deep mixing pile enters the field of foundation treatment, and meanwhile, the deep mixing pile can also be used as an underground diaphragm wall to prevent underground water from seeping into the bottom of the foundation pit. The construction industry combines actual engineering to develop a series of improvement measures, for example unipolar stirring stake, biax stirring stake, triaxial stirring stake and two-way unipolar stirring stake, can refer to the utility model patent that patent application number 2014203392490 disclosed to develop a neotype nature deep layer stirring stake that arranges on the basis of unipolar stirring stake machine and also be IMS worker method.

The conventional deep mixing pile construction process flow is as follows: the construction process comprises the steps of positioning the construction machine → drilling and drilling to a specified position → stirring the drill bit lifting and spraying slurry and the soil mass → lifting to the ground for repeated drilling and stirring → completing construction after the drill bit is lifted. Engineering practice proves that the deep mixing piles cannot effectively reduce disturbance to surrounding soil bodies: taking an IMS construction method as an example, the maximum value of the displacement of the deep soil body at the top in the construction process is 45mm and the maximum value at the bottom is 5mm, and the displacement of the deep soil body is measured within the range of +/-3 mm after the construction is finished. Considering that the disturbance influence in the pile body construction process is the largest, the modes obtained by analysis do not meet the micro-disturbance construction requirement. Therefore, the micro-disturbance deep stirring device for foundation treatment in the space adjacent to the existing building is designed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a micro-disturbance deep stirring device, which is based on an IMS construction method pile construction machine, can save the approach and construction disturbance of a common steel sleeve construction machine, and can save the construction cost and improve the construction efficiency by adopting a one-machine dual-purpose mode.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme.

The utility model provides a deep agitating unit of soil body perturbation, includes construction machinery, characterized by, still includes steel sleeve and the deep stirring drill bit of perturbation that can connect construction machinery respectively, and the deep stirring drill bit setting of perturbation is inside the steel sleeve, and the steel sleeve outside is equipped with can cooperate fixed external mounting with outside fixing device, and the adapting unit of connecting construction machinery can be dismantled to the upper end of steel sleeve.

The steel sleeve and the micro-disturbance deep stirring drill bit can be independently connected with a construction machine, a connecting component at the upper end of the steel sleeve is detachably arranged, during construction, the steel sleeve is firstly spun in place through the construction machine, then the steel sleeve is fixed through an external fixing component, then the steel sleeve is separated from the construction machine through the connecting component, then the micro-disturbance deep stirring drill bit is connected with the construction machine for construction, soil bodies in the steel sleeve and below the steel sleeve are stirred, and finally pile body pouring is completed, due to the arrangement of the steel sleeve, the structural damage of the drill bit to surrounding soil bodies in the construction process is small, especially the displacement value of the deep soil body is smaller, the disturbance influence on the pile body construction is reduced, and the forming quality of the pile body is improved; deformation control of adjacent existing buildings is prevented from being affected by the presence of the disturbance.

Preferably, the micro-disturbance deep stirring drill bit comprises a drill rod, a connecting part matched with construction machinery is arranged at the upper end of the drill rod, a plurality of blade groups are arranged on the drill rod, and a protective steel shell is arranged outside the blade groups; the lower end of the drill rod is provided with a tip and a guniting port. The multiple blade sets have synergistic effect, and the stirring effect is reliable; the drill rod tip realizes puncture, and slurry is sprayed out of the slurry spraying port to complete stirring and forming of the stirring pile; the protective steel shell can protect the outer end of the blade group, so that the service life of the blade group is prolonged; the guniting port is arranged at the bottom of the drill rod and effectively slows down the disturbance of guniting pressure to the surrounding soil body within the range of protecting the steel shell, and the micro-disturbance construction effect is realized.

Preferably, the lower end of the protective steel shell is provided with cutting saw teeth. The protection steel shell has the stirring and cutting functions due to the arrangement of the cutting sawteeth, participates in the cutting of a soil body together, and can conveniently disturb the whole deep stirring drill bit to be downward along with the drilling rod.

Preferably, the blade group comprises a first blade group, a second blade group, a third blade group and a fourth blade group, the first blade group comprises a plurality of first blade units arranged around the circumference array of the axis of the drill rod, the second blade group comprises a plurality of second blade units arranged around the circumference array of the axis of the drill rod, the fourth blade group comprises a plurality of fourth blade units arranged around the circumference array of the axis of the drill rod, the first blade units, the second blade units and the fourth blade units are all arranged in an inclined mode with the axis of the drill rod, the first blade units and the fourth blade units are arranged in a corresponding parallel mode, and included angles exist between the second blade units and the first blade units.

The blade units in the same blade group are obliquely arranged, and the second blade unit, the first blade unit and the fourth blade unit have certain included angles, so that the soil cutting capacity can be improved.

Preferably, the connecting part comprises a first bolt and a locking jack arranged on the first bolt, a rotating platform and a rotating disc are arranged at the lower end of the first bolt, and meshing sawteeth matched with the upper end of the steel sleeve are arranged on the lower side of the rotating disc. Adopt the bolt connected mode, carry out secondary fixed connection with the pin, can realize like this that it is convenient to change, convenient to detach, the installation.

Preferably, the connecting part comprises a second bolt arranged at the upper end of the drill rod, and the second bolt is provided with a fixing jack. And the connecting part adopts an interchangeable bolt connecting mode, so that the installation convenience of the construction machine matched with the steel sleeve and the micro-disturbance deep stirring drill bit is improved, and the length of the drill rod can be increased to meet the stirring reinforcement requirements of different depths.

Preferably, the external fixing piece is provided with a plurality of symmetrical fixing pieces outside the steel sleeve. The fixing stability of the steel sleeve is improved.

Preferably, the third blade group comprises a lantern ring and a third blade unit arranged outside the lantern ring, the lantern ring and the drill rod are movably arranged, the upper end and the lower end of the lantern ring are respectively provided with an elastic wave strip, and the outer end of the elastic wave strip is provided with a connecting ring; the first blade group, the second blade group and the fourth blade group are fixedly connected with a protection steel shell, and the third blade group and the protection steel shell are arranged in a separated mode. The third blade group is a free blade, does not rotate along with the rotation of the drill rod, but passively rotates along with the stirring of the soil body, not only can play a role in radial turbulence, but also can play a role in axial stirring, can prevent mixed slurry from generating mud balls and slurry overflow, and improves the stirring effect and enhances the soil body reinforcing capacity.

The utility model has the following beneficial effects:

1. the utility model is based on the IMS construction method pile construction machinery, the approach and construction disturbance of the common steel sleeve construction machinery can be saved by using the method, meanwhile, the construction cost can be saved by adopting a dual-purpose mode of one machine, and the construction efficiency is improved;

2. according to the utility model, the protective steel shell is additionally arranged outside the drill bit, the cutting sawteeth are arranged at the bottom of the protective steel shell and participate in the cutting of soil bodies together, meanwhile, the blades have a certain inclination angle, a certain angle exists between the blades, the soil body cutting capability is improved, the guniting port is arranged at the bottom of the drill rod and effectively slows down the disturbance of guniting pressure to the surrounding soil bodies within the range of protecting the steel shell, and the micro-disturbance construction effect is realized;

3. the utility model adopts a bolt connection mode and carries out secondary fixed connection by a pin, thus realizing convenient replacement, convenient disassembly and assembly, and increasing the length of the drill rod to meet the stirring reinforcement requirements of different depths;

4. the third blade group is added to serve as a free blade, so that mud balls and slurry overflow caused by mixed slurry are prevented, the stirring effect is improved, and the soil body reinforcing capacity is enhanced;

5. the utility model has simple structure and convenient operation, and effectively improves the working efficiency.

Drawings

FIG. 1 is a schematic representation of a steel sleeve of the present invention in use;

FIG. 2 is a schematic view of the present invention;

FIG. 3 is a schematic view of a mixing pile constructed according to the present invention;

FIG. 4 is a schematic view of a micro-disturbance deep stirring drill;

FIG. 5 is a schematic view of a connecting member according to the present invention;

fig. 6 is a top view of fig. 5.

In the figure: the construction equipment comprises a construction machine 1, a steel sleeve 2, an existing building influence area 3, a fixing device 4, an external fixing piece 5, a micro-disturbance deep stirring drill bit 6, an IMS construction method pile forming pile 7, a drill rod 61, a protection steel shell 62, a first blade group 63, a second blade group 64, a third blade group 65, a fourth blade group 66, a grout spraying port 67, a tip 68, a cutting sawtooth 69, a first bolt 70, a locking jack 71, a second bolt 72, a fixing jack 73, a rotating platform 74, a spinning disc 75 and a meshing sawtooth 76.

Detailed Description

The utility model is further illustrated with reference to the accompanying drawings and specific examples.

Referring to fig. 1 to 6, a soil body micro-disturbance deep layer stirring device for the construction of a deep layer stirring pile, the soil body micro-disturbance deep layer stirring device comprises a construction machine 1, and further comprises a steel sleeve 2 and a micro-disturbance deep layer stirring drill bit 6 which can be respectively connected with the construction machine 1, wherein the total length of the steel sleeve 2 is not more than 20% of the length of the deep layer stirring pile and is not less than 1.5 m. The construction machine 1 adopts an IMS construction method pile construction machine 1, and construction operation transformation design suitable for spinning of a steel sleeve 2 is carried out on the construction machine 1. The micro-disturbance deep stirring drill bit 6 is arranged inside a cylinder where the steel sleeve 2 is located, an external fixing piece 5 capable of being matched and fixed with an external fixing device 4 is arranged on the outer side of the steel sleeve 2, and the external fixing piece 5 is symmetrically arranged on the outer side of the steel sleeve 2. The external fixing piece 5 is arranged to protrude outwards from the outer side face of the upper end of the steel sleeve 2. The upper end of the steel sleeve 2 is detachably provided with a connecting component for connecting the construction machine 1. The connecting component comprises a first bolt 70 and a locking jack 71 arranged on the first bolt 70, the lower end of the first bolt 70 is provided with a rotating platform 74 and a spinning disc 75, and the lower side of the spinning disc 75 is provided with engaging sawteeth 76 matched with the upper end of the steel sleeve 2. The first pins 70 are hexagonal pins, and the locking insertion holes 71 are formed at the sides of the first pins 70. The shape of the meshing saw teeth 76 is an isosceles trapezoid with a cambered surface, the upper end of the steel sleeve 2 is provided with a tooth shape corresponding to the meshing saw teeth 76, the radial synchronization of the connecting component and the steel sleeve 2 can be realized after the meshing saw teeth 76 are meshed, the steel sleeve 2 can be driven to be synchronously pressed down when the construction machine 1 is pressed down, and the connecting component and the steel sleeve 2 can be easily separated when the construction machine 1 is pressed upwards.

The micro-disturbance deep stirring drill bit 6 comprises a drill rod 61, a connecting part matched with the construction machine 1 is arranged at the upper end of the drill rod 61, the connecting part comprises a second bolt 72 arranged at the upper end of the drill rod 61, and a fixing insertion hole 73 is formed in the second bolt 72. A plurality of blade groups are arranged on the drill rod 61, and a protective steel shell 62 is arranged outside the blade groups; the lower end of the drill rod 61 is provided with a tip 68 and a guniting port 67. The tip 68 extends to the outside of the lower end of the protective steel shell 62, and the slurry nozzle 67 is corresponding to the inside of the lower end of the protective steel shell 62. The protective steel shell 62 is annular; the lower end surface of the protective steel shell 62 is provided with cutting saw teeth 69. The blade group includes first blade group 63, second blade group 64, third blade group 65 and fourth blade group 66, first blade group 63 includes four first blade units that set up around drilling rod 61 axis circumference array, second blade group 64 includes four second blade units that set up around drilling rod 61 axis circumference array, fourth blade group 66 includes four fourth blade units that set up around drilling rod 61 axis circumference array, first blade unit, second blade unit and fourth blade unit all set up with drilling rod 61 axis slope, first blade unit and fourth blade unit correspond parallel arrangement, the contained angle of first blade unit and drilling rod 61 is 45 degrees, the contained angle of second blade unit and drilling rod 61 is 45 degrees, the contained angle of fourth blade unit and drilling rod 61 is 45 degrees, there is the contained angle between second blade unit and the first blade unit. An included angle which rotates for 45 degrees around the drill rod 61 exists between the second blade unit and the first blade unit, the first blade group 63 is fixedly connected with the drill rod 61 and the protection steel shell 62 respectively, the second blade group 64 is fixedly connected with the drill rod 61 and the protection steel shell 62 respectively, and the fourth blade group 66 is fixedly connected with the drill rod 61 and the protection steel shell 62 respectively. The undersides of the first, second, third and fourth blade units are all provided with cutting serrations 69. A third vane pack 65 is connected to the drill pipe in a manner to be able to be raised and lowered and rotated.

The steel sleeve 2 and the micro-disturbance deep stirring drill bit 6 can be independently connected with the construction machine 1, the connecting part at the upper end of the steel sleeve 2 can be detachably arranged, during construction, the steel sleeve 2 is firstly spun in place through the construction machine 1, then the steel sleeve 2 is fixed through the external fixing part 5, then the steel sleeve 2 is separated from the construction machine 1 through the connecting part, then the micro-disturbance deep stirring drill bit 6 is connected with the construction machine 1 for construction, soil bodies in the steel sleeve 2 and below the steel sleeve are stirred, and finally pile body pouring is finished, and due to the arrangement of the steel sleeve 2, structural damage of the drill bit to the surrounding soil bodies in the construction process is small, particularly the displacement value of the deep soil bodies is smaller, the disturbance influence on the pile body construction is reduced, and the forming quality of the pile body is improved; deformation control of adjacent existing buildings is prevented from being affected by the presence of the disturbance. The third blade group 65 is a free blade, does not rotate along with the rotation of the drill rod 61, but passively rotates along with the stirring of the soil body, not only can play a role in radial turbulence, but also can play a role in axial stirring, can prevent the mixed slurry from generating mud balls and slurry overflow, and improves the stirring effect and enhances the soil body reinforcing capacity.

Claims

1. The utility model provides a deep agitating unit of soil body perturbation, includes construction machinery, characterized by, still includes steel sleeve and the deep stirring drill bit of perturbation that can connect construction machinery respectively, and the deep stirring drill bit setting of perturbation is inside the steel sleeve, and the steel sleeve outside is equipped with can cooperate fixed external mounting with outside fixing device, and the adapting unit of connecting construction machinery can be dismantled to the upper end of steel sleeve.

2. The soil micro-disturbance deep stirring device of claim 1, wherein the micro-disturbance deep stirring drill comprises a drill rod, a connecting component matched with construction machinery is arranged at the upper end of the drill rod, a plurality of blade sets are arranged on the drill rod, and a protective steel shell is arranged outside the blade sets; the lower end of the drill rod is provided with a tip and a guniting port.

3. The soil mass micro-agitation deep stirring apparatus of claim 2 wherein the lower end of the protective steel shell is provided with cutting serrations.

4. The soil micro-disturbance deep stirring device as claimed in claim 2, wherein the blade set comprises a first blade set, a second blade set, a third blade set and a fourth blade set, the first blade set comprises a plurality of first blade units arranged around the circumference of the drill rod axis in an array manner, the second blade set comprises a plurality of second blade units arranged around the circumference of the drill rod axis in an array manner, the fourth blade set comprises a plurality of fourth blade units arranged around the circumference of the drill rod axis in an array manner, the first blade units, the second blade units and the fourth blade units are all arranged obliquely with respect to the drill rod axis, the first blade units and the fourth blade units are arranged in parallel correspondingly, and an included angle exists between the second blade units and the first blade units.

5. The soil micro-disturbance deep stirring device as claimed in claim 1, wherein the connecting member comprises a first pin and a locking jack provided on the first pin, the first pin is provided at a lower end thereof with a rotary platform and a rotary pressure plate, and the lower side of the rotary pressure plate is provided with engaging serrations cooperating with the upper end of the steel sleeve.

6. The soil micro-disturbance deep stirring device as claimed in claim 5, wherein the connecting member comprises a second pin provided at an upper end of the drill rod, and the second pin is provided with a fixing insertion hole.

7. The soil micro-disturbance deep stirring device as claimed in claim 1, wherein the external fixing member is provided with a plurality of symmetrically arranged members at the outer side of the steel sleeve.