CN210117711U - A prefabricated barrel-shaped basic structure and its construction device are implanted in a large-diameter ring-shaped agitated tank and then implanted - Google Patents

Abstract

The utility model discloses a prefabricated barrel-shaped basic structure and a construction device thereof after being stirred into a large-diameter annular ring and then implanted into a tank, and belongs to the field of foundation foundation. The foundation structure includes several cement mixing piles and a large-diameter prefabricated annular pipe pile. All the cement mixing piles are arranged in a circular ring on the ground level, and the adjacent cement mixing piles are engaged with each other. Before the cement is completely solidified, a circular soft continuous underground groove can be formed end-to-end; underground continuous grooves A prefabricated annular pipe pile made of concrete is inserted into the middle vertical ground; the inner and outer walls of the prefabricated annular pipe pile and the mixing pile are tightly combined by filling cement and soil, and the cement solidifies to form a closed integral impermeable bucket foundation. The utility model also improves the existing stirring pile machine, and the improved stirring drilling and stirring device can form a large-diameter annular soft underground continuous groove in the soft soil foundation. The foundation structure of the utility model can greatly exert the bearing effect of the soil body in the closed range, and makes up for the defects of small diameter and low bearing capacity of the traditional prefabricated pipe piles. seismic performance.

Description

A prefabricated barrel-shaped base structure and its construction after a large-diameter annular stirring tank is implanted device

technical field

The utility model belongs to the field of foundation foundation, in particular to a large-diameter annular agitated tank and then implanted into a prefabricated barrel-shaped foundation structure and a construction device thereof.

Background technique

At present, the two most widely used pile foundations in the construction industry are prefabricated pipe piles and bored piles. Among them, the diameter of the prefabricated pipe pile foundation is small, and the bearing capacity of the single pile is low, generally in the range of 400-500KN, and the large diameter prefabricated pipe pile is relatively rare due to the high requirements for construction equipment. In order to improve the bearing capacity of the prefabricated pipe pile foundation, it is necessary to increase the driving depth of the pipe pile, which brings problems such as difficulty in pressing the pile, breaking the pile, or generating huge construction noise during piling. The bored pile has a larger diameter and higher bearing capacity, generally in the range of 1000-2000KN, but its construction requires a long construction period, high construction costs, and difficult construction quality control. Segregation, necking, and piles are prone to occur when concrete is poured on site. Bottom sediment thickness, etc. Therefore, it is difficult for the two common pile types to meet the requirements of large diameter and high bearing capacity, and each has certain defects.

All drill rods of the existing single (three) shaft mixing pile driver are active drill rods (drive shafts), that is, the drill rods are directly connected to the motor. When drilling soft foundation soil, only small diameters can be drilled. A single circular groove cannot form a large-diameter annular soil groove, so the application of the existing single (three) shaft mixing pile driver has certain limitations.

To this end, combined with the characteristics of the existing pile foundation, a large-diameter annular prefabricated barrel foundation and construction method are designed, which can realize the barrel-shaped foundation with large diameter and high bearing capacity requirements, which can be considered from the following three aspects:

First, in order to improve the bearing capacity of the foundation, it is necessary to improve the interaction between the foundation and the foundation soil, and try to play the bearing role of the soil itself, so as to improve the bearing capacity of the foundation without adding building materials. In the past pile foundations, the load-bearing effect of the soil between the piles was extremely limited. The main reason was that the soil body was easily deformed laterally when it was squeezed. If the soil body could be enclosed inside the foundation, the load-bearing effect of the soil between the piles would be greatly improved. , while reducing soil settlement.

Second, large-diameter prefabricated pipe piles are generally difficult to drive (press) into the foundation, because the resistance received during the driving process is too large. If the foundation can be pretreated before the pile foundation is built to form a soft boundary, It will be beneficial to the construction process of large-diameter prefabricated pile foundations.

Third, the single-shaft mixing pile driver or the three-shaft mixing pile driver can pretreat the foundation soil, and can mix the foundation soil softly, and at the same time, it can spray cement and mix with the soil, which can improve the impermeability of the soil. and load carrying performance. However, neither can form size-specific soft boundaries. By adding a drill bit, the existing single-shaft agitating pile driver can be properly improved to produce a large-diameter annular annular soil trough.

SUMMARY OF THE INVENTION

Considering that the bearing effect of the foundation soil is insufficient, the overall bearing capacity of the foundation can be improved by closing the soil mass, and a large-diameter annular closed barrel foundation is designed; A construction device and construction method are designed to generate a ring-shaped closed soft soil boundary. The purpose of the utility model is to solve the defects of insufficient bearing capacity of the existing foundation foundation and inconvenient construction, and to provide a basic structure of a prefabricated combined box that is inserted into a mixing tank.

The technical scheme adopted by the utility model to solve the specific technical problem is:

A large-diameter ring-shaped stirring tank is then implanted into a prefabricated barrel-shaped basic structure, which includes several stirring piles embedded in the foundation, all the stirring piles are arranged in a circular ring on the ground plane, and the adjacent stirring piles are mutually occlusal connection to form an end-to-end annular underground continuous groove structure; in the underground continuous groove structure, a prefabricated annular pipe pile made of concrete is inserted vertically on the ground, and the inner diameter of the prefabricated annular pipe pile is greater than The inner diameter of the underground continuous trough structure and the outer diameter of the prefabricated annular pipe pile are smaller than the outer diameter of the underground continuous trough structure; the inner and outer side walls of the prefabricated annular pipe pile and the boundary of the stirring pile are tightly combined by filling cement and soil.

The prefabricated annular pipe pile in the utility model refers to a pipe pile that is prefabricated in a factory, and the cross-section of the pipe pile is an annular shape.

Preferably, the prefabricated annular pipe pile is a split assembled pipe pile composed of a plurality of prefabricated concrete arc-shaped members, one end of each precast concrete arc-shaped member is provided with a strip-shaped rectangular protrusion, and the other end is provided with a strip-shaped rectangular protrusion. There are strip-shaped grooves that can be matched with the strip-shaped rectangular protrusions, and the plurality of prefabricated concrete arc-shaped members are sequentially engaged to form a closed annular pile body connected end to end.

Preferably, there are multiple prefabricated annular pipe piles, one end of each prefabricated annular pipe pile is provided with an annular protrusion, and the other end is provided with an annular groove that can cooperate with the annular protrusion, A plurality of prefabricated annular pipe piles are stacked and connected in sequence in the height direction.

Another object of the present invention is to provide a device for annular stirring into a tank, which comprises a driving drill pipe, a drill bit, an annular disc and a driven drill pipe; The disk body of the disc is evenly distributed in the circumferential direction, and a drill bit is installed at the bottom of each active drill pipe and driven drill pipe; the two drill bits at the bottom of any two adjacent drill pipes are arranged in a high and low dislocation in the height direction, and the two drill bits are arranged at the bottom. The drilling range of each drill bit is partially occluded in the projection direction; each driving drill pipe is connected to the output shaft of the motor in a transmission connection, each driven drill pipe is mounted on the annular disc through a bearing, and the driven drill pipe is connected with the transmission member through the transmission member. The active drill rod constitutes a coordinated transmission, and the active drill rod drives the other driven drill rods to rotate synchronously.

The above-mentioned annular stirring tank device can be used to manufacture the annular underground continuous tank structure in which the aforementioned large-diameter annular stirring tank is implanted into a prefabricated barrel-shaped basic structure.

Preferably, the active drill pipe is sleeved with a casing, and the motor is mounted on a fixed bracket.

Preferably, the transmission element is a gear or a chain.

Preferably, the drill bit is detachably mounted on the bottom of the driving drill rod and the driven drill rod.

Preferably, the number of active drill rods is preferably not less than 2, evenly distributed along the circumference of the disk body of the annular disc, and the number of driven drill rods driven by each active drill rod is the same.

The beneficial effects of the present utility model are as follows:

1. The utility model can form a large-diameter barrel-shaped foundation, which has greater lateral rigidity relative to the single-pile foundation, so that the horizontal bearing capacity of the foundation can be improved; relative to the pile group foundation, the present utility model improves the overall structure of the foundation. Stability and shock resistance.

2. The utility model improves the traditional single (three) shaft stirring pile driver, increases the number of drill bits, can drill a large-diameter annular soil groove in the foundation, and increases the application range of the stirring pile driver.

3. The utility model can give full play to the bearing effect of the enclosed soil body in the foundation, thereby reducing the amount of concrete, greatly improving the vertical bearing capacity of the foundation, and reducing the settlement of the foundation.

4. Compared with the concrete solid pipe pile, the present utility model can not only increase the contact area between the foundation and the soil body, but also the cement has a reinforcing effect on the foundation-soil contact interface, and at the same time, the bearing capacity coefficient of the bottom of the foundation is improved, and the closed soil body is greatly exerted. The bearing effect of the new foundation greatly improves the vertical bearing capacity of the new foundation. Therefore, under the condition of the same bearing capacity requirement, the amount of concrete required by the present invention is greatly reduced, which is more energy-saving and environmentally friendly.

5. The construction method of the utility model is simple, the concrete components can be prefabricated in the factory, and the production is convenient; the main construction device can be improved by the traditional mixing pile driver, the technology of mixing cement and soil into a tank is mature, and the construction difficulty is small.

Description of drawings

1 is a schematic diagram of a prefabricated barrel-shaped basic structure implanted after a large-diameter annular agitation is formed into a tank;

Figure 2 is a schematic diagram of an integrally formed prefabricated annular pipe pile;

Figure 3 is a schematic diagram of a prefabricated annular pipe pile of split assembly;

Figure 4 is a schematic diagram of a prefabricated annular pipe pile longitudinally integrally formed;

Figure 5 is a schematic diagram of a prefabricated annular pipe pile assembled in longitudinal sections;

6 is a schematic structural diagram of a ring-shaped stirring tank device;

Figure 7 is a schematic view of the annular disc structure (four-axis drive and transmission) composed of four separate structures;

8 is a schematic diagram of a transmission structure composed of 20 drill pipes in the embodiment;

Fig. 9 is a schematic diagram of the construction of the prefabricated barrel-shaped base structure after the large-diameter annular stirring is formed into a tank.

In the figure: prefabricated concrete arc member 1, prefabricated annular pipe pile 2, strip-shaped rectangular protrusion 3, strip-shaped groove 4, annular protrusion 5, annular groove 6, annular stirring tank device 7, motor 8. Active drill pipe 9, drill bit 10, transmission member 11, bearing 12, casing 13, annular disc 14, driven drill pipe 15, fixed bracket 16, split-structure active drill pipe 17, split-structure slave Moving drill pipe 18, stirring pile 19.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and implementation steps.

The utility model designs a large-diameter annular precast concrete bucket foundation, and the soil body is enclosed in the annular foundation, which can greatly exert the bearing effect of the excavated soil body; at the same time, the enclosed soil body is used to increase the cross-sectional area of the foundation, thereby expanding the The contact area between the side of the foundation and the soil is increased, and the bearing capacity of the foundation is also increased. In terms of construction machinery, the traditional mixing pile driver is improved to form a ring-shaped closed boundary that is soft and easy to insert into the prefabricated basic components. In addition, in order to increase the friction force of the foundation-soil interface, cement was sprayed at the same time when the equipment was mixing the soil, and a cement-soil interface with better bearing effect was formed within the range of the foundation-soil contact interface. Finally, the concrete cap was poured. It forms a composite foundation with prefabricated segments, closed soil, and cement and soil jointly bearing the upper building structure. The following three aspects will be further elaborated on the specific infrastructure, construction devices and construction methods.

As shown in FIG. 1, a large-diameter annular stirring tank in this embodiment is implanted into a prefabricated barrel-shaped basic structure, and its main structure includes several stirring piles 19 embedded in the foundation. The stirring piles 19 can be made of a single ( 3) It is formed by rotary spraying and stirring the foundation by mixing equipment such as shaft stirring pile machine, and each stirring pile 19 is in the shape of a round pile. From the perspective of the ground plane, all the stirring piles 19 are arranged in a circular ring on the ground plane, and the adjacent stirring piles 19 are engaged with each other, and the adjacent piles are partially penetrated, forming an end-to-end, annular soft Underground continuous trough structure. While stirring the foundation soil, the mixing equipment can use the shotcrete hole at the bottom of the drill bit to spray cement into the soil, so that the cement and the original foundation soil can be mixed evenly to form cement-soil with better impermeability and stronger cohesion. Before the cement is completely solidified, it can be equivalent to forming a ring-shaped closed boundary that is easy to insert into concrete prefabricated components. The soft foundation soil of this boundary is closed by cement and soil, and after the cement is solidified, a closed integral impermeable bucket foundation is formed. In the underground continuous groove structure of the present invention, a prefabricated annular pipe pile 2 made of concrete is inserted into the vertical ground, and the inner diameter of the prefabricated annular pipe pile 2 is larger than that of the underground continuous groove structure. The outer diameter of 2 is smaller than the outer diameter of the underground continuous trough structure, so that the prefabricated annular pipe pile 2 can be smoothly and vertically inserted into the underground continuous trough structure. Moreover, because the underground continuous groove structure has a large amount of cement and soil, and the cross-sectional size of the prefabricated annular pipe pile 2 is smaller than the cross-section of the underground continuous groove structure, the inner and outer walls of the prefabricated annular pipe pile 2 and the stirring pile 7 There is a certain space between the foundation soil at the boundary, and the space is filled with cement and soil. The cement-soil layer can be used as a transition layer to improve the contact relationship between the foundation soil and the overall concrete structure. The top of the prefabricated annular pipe pile 2 can be poured with superstructures, such as a cap and the like, as required.

In the prefabricated barrel-shaped foundation structure, by enclosing the soil in the prefabricated annular pipe piles, the bearing effect of the excavated soil is greatly exerted; at the same time, the enclosed soil is used to increase the cross-sectional area of the foundation, thereby expanding the lateral surface of the foundation The contact area with the soil increases the bearing capacity of the foundation. In addition, in order to increase the friction force of the foundation-soil interface, cement is sprayed at the same time when the equipment is mixing the soil, and a cement-soil interface with better bearing effect is formed within the range of the foundation-soil contact interface, and finally the foundation is poured. The superstructure forms the composite foundation of the prefabricated annular pipe pile, the closed soil, and the cement and soil jointly bearing the superstructure.

In the above prefabricated barrel-shaped base structure, if the size of the base is small, the prefabricated annular pipe pile 2 can be an integrally formed integral member, as shown in FIG. 2 . However, if the size of the foundation is large, and it is necessary to form a large-diameter annular structure, the overall forming process is difficult, and the split-assembled pipe pile as shown in Figure 3 can be considered. A section of split-assembled pipe pile is composed of a plurality of prefabricated concrete arc-shaped members 1, one end of each prefabricated concrete arc-shaped member 1 is provided with a strip-shaped rectangular protrusion 3, and the other end is provided with a strip-shaped rectangular protrusion 3 that can cooperate with it. The strip-shaped groove 4, the strip-shaped rectangular protrusion 3 and the strip-shaped groove 4 can form a tenon-and-mortise fit. Therefore, dividing the whole prefabricated annular pipe pile 2 into a plurality of prefabricated concrete arc-shaped members 1 can reduce the overall manufacturing difficulty and save the cost. After each prefabricated concrete arc-shaped member 1 is prefabricated in the factory, it can be transported to the construction site, and then sequentially driven into the foundation for on-site assembly. After the cement-soil is solidified, it can exert the same performance as the integrally formed component as a whole. Of course, the specific molding method is determined according to the construction requirements, and the assembly and connection structure of the arc-shaped components can also be adjusted according to the needs. At the same time, it can also be considered to fill the gap between the strip-shaped rectangular protrusion 3 and the strip-shaped groove 4 by grouting to make the connection more tightly, and finally form a stable closed annular structure.

Similarly, since the depth of the foundation is not fixed, when the depth of the foundation is shallow, the prefabricated annular pipe pile 2 can be directly prefabricated into a corresponding length, as shown in FIG. 4 . However, when the foundation depth is deep, the manufacturing and transportation costs of a single long-length prefabricated annular pipe pile 2 are relatively high, so it can be considered to assemble by multi-section splicing. As shown in FIG. 5 , that is, the prefabricated annular pipe pile 2 is divided into multiple sections, one end of each prefabricated annular pipe pile 2 is provided with an annular protrusion 5 , and the other end is provided with an annular recess that can cooperate with the annular protrusion 5 . The groove 6 and the annular protrusion 5 can be inserted into the annular groove 6 to form a mating connection. After each section of prefabricated annular pipe piles 2 are prefabricated in the factory, they can be transported to the construction site, and then driven into the foundation for on-site assembly. The grooves 6 are stacked and connected in sequence, and the length is gradually increased, and the total height after the connection can meet the requirements.

The above-mentioned prefabricated annular pipe pile 2 can be formed by pouring concrete by making a mold of a specific size, and if necessary, reinforcing steel can be added to improve the crack resistance of the concrete member.

At present, the large-diameter annular segment is widely used in lining projects such as subways and tunnels, and the technology is relatively mature, but it has not been applied to the foundation field. The conventional single (multi-) shaft mixing pile driver can only drill one by one or several, and cannot form annular drilling, its efficiency is low, and the quality of the holes is not easy to control. Therefore, in this utility model, the conventional single (multi-) shaft mixing pile driver is improved, and a multi-shaft mixing pile driver is designed. The main purpose of the improvement is to drill holes in the foundation to form a ring-shaped soft soil boundary with a specific size, forming a kind of An annular stirring tank device 7 capable of directly drilling an annular groove. As shown in FIG. 6 , the annular stirring tank forming device 7 is mainly composed of a driving drill rod 9, a drill bit 10, a motor 8, a transmission member 11, a bearing 12, a casing 13, an annular disc 14, a driven drill rod 15, a fixed Bracket 16 and other components. The annular disc 14 is an annular disc body, and the disc body is uniformly provided with mounting holes in the circumferential direction. The driving drill rod 9 and the driven drill rod 15 are evenly distributed along the circumference of the disk body of the annular disk 14, and are positioned through the installation holes. A drill bit 10 is installed on the bottom of each of the driving drill rod 9 and the driven drill rod 15 . The drill bit 10 is preferably installed on the bottom of the driving drill rod 9 and the driven drill rod 15 in a detachable form, which is convenient for disassembly and maintenance. The drill bit 10 is provided with a grouting port connected to the grouting device. While mixing the soil, the three-axis mixing equipment can be used to spray cement in the soil, so that the cement and the original foundation soil can be mixed evenly to form better impermeability and cohesion. Stronger cement. It should be noted that the driving and installation methods of the driving drill rod 9 and the driven drill rod 15 are different. Each active drill rod 9 is drivingly connected with the output shaft of the motor 8, the motor 8 is installed on the fixed bracket 16, and the driving drill rod 9 is driven to rotate by the motor 8 and drives the lower drill bit 10 to rotate to drill. The part of the active drill rod 9 extending out of the annular disc 14 is sheathed with a casing 13 for protection. The driven drill rod 15 itself does not have a power motor, but needs to be driven by the active drill rod 9 . Each driven drill rod 15 is installed in the mounting hole of the annular disc 14 through the bearing 12, and the driven drill rod 15 forms a cooperative transmission with the driving drill rod 9 through the transmission member 11, and the driving drill rod 9 drives the remaining driven drill rods. The drill pipe 15 rotates synchronously. The transmission member 11 may be a gear or a chain, etc., as long as the transmission between the two rods can be realized. In addition, since the prefabricated annular pipe pile 2 has a certain thickness, it is required that the drilling range of two adjacent drill bits 10 is partially occluded in the projection direction, and the stirring pile formed after drilling can also be occluded, and the thickness of the occlusal position can accommodate Prefabricated annular pipe pile 2. In order to achieve this requirement, the present invention designs that the vertical lengths of adjacent drill pipes are different, and the two drill bits 10 at the bottom of any two adjacent drill pipes are arranged in a high and low position in the height direction, and the two drill bits 10 drill The hole range is partially occluded in the projection direction. In this embodiment, the annular disk 14 is counted in one direction, the odd-numbered drill bits 10 are located above, and the even-numbered drill bits 10 are located at a certain distance below, so that the adjacent drill bits 10 will not collide, but the drilling range exists. coincide. In this way, in the process of running all the drill pipes at the same time, it can ensure the formation of an underground continuous groove structure with a certain thickness.

In order to maintain the stability of the transmission, the number of driving drill rods 9 is preferably not less than 2, which are evenly distributed along the circumference of the annular disc 14, and the number of driven drill rods 15 driven by each driving drill rod 9 is the same. . In addition, if the diameter of the annular disc is small, it can be an integral structure, but if the diameter of the annular disc is large, it can also be a combined structure, as shown in Figure 7 (this figure is only for the drill pipe and the disc The top view of the figure, the outline of the drill bit is omitted), a ring-shaped disk is formed by a combination of multiple split structures (4 pieces are shown in the figure), and each split structure in the figure has an active drill pipe 17 with a split structure and 2 The driven drill pipe 18 of the split structure is convenient for disassembly, construction and transportation.

In this embodiment, as shown in FIG. 8 , a total of 20 drill rods are designed in the annular stirring tank device 7 , 4 of which are active drill rods 9 , which can form 20 stirring piles 19 at one time. In the device, the transmission member 11 is realized by gears. The method is that gears are respectively arranged at equal height positions on the driving drill rod 9 and the driven drill rod 15, and the gears on the two adjacent rods are meshed with each other.

Based on the ring-shaped stirring tank device 7, the method of implanting the prefabricated barrel-shaped basic structure after the large-diameter ring-shaped stirring tank shown in FIG. 1 is constructed, and the steps are as follows:

Step 1. Design and prefabricate a ring-shaped stirring tank device 7 and a prefabricated annular pipe pile 2 of suitable size according to the point map shown in the left figure of FIG. 9 . The prefabricated annular pipe pile 2 is formed by pouring concrete in a mold of a specific size, and reinforcement can be added to improve the crack resistance of the concrete member.

Step 2. Use the ring-shaped stirring tank device 7 to drill the soil body in the target area with spiral shotcrete from top to bottom. While stirring, the cement mortar is continuously sprayed into the foundation soil through the shotcrete port on the drill bit, so that the The foundation soil in the mixing area is mixed with the concrete mortar. Each drill bit 10 forms a stirring pile 19 filled with cement and soil in the foundation, and a plurality of stirring piles 19 are engaged with each other to form an end-to-end annular continuous groove structure, as shown in the middle diagram of FIG. 9 . At this time, the underground continuous trough structure forms a ring-shaped closed soft soil boundary of a certain size in the foundation, which is convenient for the insertion of precast concrete annular pipe piles. The depth of each stirring pile can be adjusted according to the actual situation, and can be drilled into the bearing layer when necessary to improve the bearing capacity of the overall pile end.

Step 2. Before the cement and soil are solidified, a plurality of precast concrete arc members 1 are sequentially inserted into the underground continuous groove structure, so that the plurality of precast concrete arc members 1 are engaged end to end through the strip-shaped rectangular protrusions 3 and the strip-shaped grooves 4. , combined to form a closed prefabricated annular pipe pile 2, as shown in the right figure of Figure 9. When there are a plurality of prefabricated annular pipe piles 2 in the depth direction, construction is carried out one by one, and the upper and lower prefabricated annular pipe piles 2 are assembled through the annular protrusion 5 and the annular groove 6 . Of course, if it is an integrated prefabricated annular pipe pile 2, it can be directly inserted without assembly.

Insertion method: If the soil layer is soft, the self-weight of the prefabricated annular pipe pile 2 can be used to insert it. If the soil layer is relatively hard, external force can be applied to press in.

Step 3. After inserting the prefabricated annular pipe pile 2 into the predetermined soil depth, the prefabricated annular pipe pile 2 slightly protrudes from the surface. Then, a concrete cap can be poured on the surface of the foundation, so that the top of the prefabricated annular pipe pile 2 is connected with the cap into a whole, and after curing, a prefabricated barrel-shaped base structure is formed.

Through the above technical solutions, the utility model designs a large-diameter prefabricated barrel foundation that can effectively utilize the bearing capacity of the closed soil, which can greatly improve the vertical and horizontal bearing capacity of the foundation and the foundation, reduce the amount of concrete, and improve the The overall seismic performance of the foundation and superstructure. The principle is simple and reliable, the construction method is simple, the applicable working conditions are wide, and it is less affected by the on-site construction conditions; it can improve the safety and stability of the building structure, and has certain energy-saving and environmental protection effects.

The above-mentioned embodiment is only a preferred solution of the present invention, but is not intended to limit the present invention. Various changes and modifications can also be made by those of ordinary skill in the relevant technical field without departing from the spirit and scope of the present invention. For example, the shape, size and fastening method of the prefabricated annular segment can be changed according to actual engineering requirements. Therefore, all technical solutions obtained by means of equivalent replacement or equivalent transformation all fall within the protection scope of the present invention.

Claims (8)

1. A prefabricated barrel-shaped basic structure is implanted after a large-diameter annular stirring into a tank, characterized in that it includes several cement mixing piles (19) embedded in the foundation, and all the mixing piles (19) are along the ground plane. Circular arrangement, and the adjacent stirring piles (19) are engaged with each other to form a circular underground continuous groove structure connected end to end; in the underground continuous groove structure, a prefabricated circular groove made of concrete is inserted vertically on the ground. The annular pipe pile (2), and the inner diameter of the prefabricated annular pipe pile (2) is larger than the inner diameter of the underground continuous groove structure, and the outer diameter of the prefabricated annular pipe pile (2) is smaller than the outer diameter of the underground continuous groove structure; The inner and outer side walls of the prefabricated annular pipe pile (2) and the boundary of the stirring pile (19) are tightly combined by filling cement and soil. 2. The large-diameter annular agitation tank according to claim 1 is implanted into a prefabricated barrel-shaped basic structure, wherein the prefabricated annular pipe pile (2) is composed of a plurality of prefabricated concrete arc members ( 1) The combined split-assembled pipe pile, each precast concrete arc member (1) is provided with a strip-shaped rectangular protrusion (3) at one end, and the other end is provided with a strip-shaped rectangular protrusion (3) With the matched strip grooves (4), the plurality of prefabricated concrete arc-shaped members (1) are engaged in sequence to form a closed annular pile body connected end to end. 3. The large-diameter annular agitation tank according to claim 1 is implanted into a prefabricated barrel-shaped basic structure, characterized in that there are multiple prefabricated annular pipe piles (2), and each prefabricated annular One end of the shaped pipe pile (2) is provided with an annular protrusion (5), the other end is provided with an annular groove (6) that can cooperate with the annular protrusion (5), and a plurality of prefabricated annular pipe piles ( 2) The connections are stacked in sequence in the height direction. 4. A construction device for implanting a prefabricated barrel-shaped basic structure after the large-diameter annular stirring tank according to claim 1 is manufactured, characterized in that it comprises an active drill pipe (9), a drill bit (10), an annular The disk (14) and the driven drill pipe (15); the said active drill pipe (9) and the driven drill pipe (15) are evenly distributed along the circumference of the disk body of the annular disk (14). 9) A drill bit (10) is installed on both the bottom of the driven drill pipe (15); the two drill bits (10) at the bottom of any two adjacent drill pipes are arranged in a high-low dislocation in the height direction, and the two drill bits (10) The drilling range is partially engaged in the projection direction; each active drill pipe (9) is connected to the output shaft of the motor (8) in a transmission connection, and each driven drill pipe (15) is installed in the ring through the bearing (12). on the disc (14), and the driven drill rod (15) forms a cooperative transmission with the active drill rod (9) through the transmission member (11), and the active drill rod (9) drives the remaining driven drill rods (15) to rotate synchronously . 5 . The construction device according to claim 4 , wherein the active drill pipe ( 9 ) is sheathed with a casing ( 13 ), and the motor ( 8 ) is mounted on a fixed bracket ( 16 ). 6 . 6 . The construction device according to claim 4 , wherein the transmission member ( 11 ) is a gear or a chain. 7 . 7 . The construction device according to claim 4 , wherein the drill bit ( 10 ) is detachably mounted on the bottom of the driving drill rod ( 9 ) and the driven drill rod ( 15 ). 8 . 8. The construction device according to claim 4, characterized in that, the active drill pipes (9) are an even number of not less than 2, and are evenly distributed along the circumference of the disk body of the annular disk (14), The number of driven drill rods (15) driven by each active drill rod (9) is the same.

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