WO2018177305A1

WO2018177305A1 - Groove pile for fabricated underground building and construction method thereof

Info

Publication number: WO2018177305A1
Application number: PCT/CN2018/080789
Authority: WO
Inventors: 王燏斌
Original assignee: 王燏斌
Priority date: 2017-03-29
Filing date: 2018-03-28
Publication date: 2018-10-04
Also published as: CN106836188A

Abstract

A groove pile (2) for a fabricated underground building. The fabricated underground building comprises walls (1) and groove piles (2); a concave-convex embedded structure comprising a protrusion and a groove is provided at a joint between a wall (1) and a pile (2); the protrusion (1-1) is provided at the joint part of the wall (1) and the groove (2-1) is provided at the joint part of the pile (2); the protrusion (1-1) is embedded in the recess of the groove (2-1); a track (4) for operating a chain cutter (3) is provided at the bottom of the pile (2); the chain cutter (3) is mounted on the track (4) during construction; the chain cutter (3) is composed of a chain (3-1) and a cutter (3-2) mounted on the chain (3-1); during construction, the chain cutter (3) excavates rock at the bottom of the pile (2); and the chain cutter (3) running from bottom to top brings the excavated rock upward from the bottom of the pile (3); and the pile (3) and the bottom chain cutter (3) move downwards simultaneously. Also disclosed is a construction method of the groove pile (2) for a fabricated underground building.

Description

Groove pile for prefabricated underground building and construction method thereof

Technical field

The invention relates to a groove pile for a prefabricated underground building and a construction method thereof, and belongs to the technical field of civil engineering foundation construction.

Background technique

The existing large-scale basic technology adopts the overall excavation construction method, with long construction period, high labor intensity and poor working environment safety.

Summary of the invention

The invention provides a groove pile for a fabricated underground building and a construction method thereof, the purpose of which is to overcome the defects of the prior art, and the main advantages thereof: the assembled underground building comprises a wall 1 and a groove pile 2 The interface between the wall 1 and the pile 2 is composed of a boss and a groove to form a concave-convex embedded structure, and the connection is safe and reliable. The wall 1 and the pile 2 themselves have a chain cutter for excavating the bottom rock, the factory prefabricated wall and pile, and the site is divided. The block or the whole is lowered, the construction is simple, the construction period is short, and the cost is low.

Technical solution of the invention: the assembled underground building comprises a wall 1 and a groove pile 2, and the interface of the wall 1 and the pile 2 is composed of a boss and a groove to form a concave-convex embedded structure, and the interface of the wall 1 is provided with a boss 1 -1, the groove 2 is provided at the interface of the pile 2, the thickness of the maximum thickness of the boss 1-1 is greater than the thickness t of the joint between the end of the boss 1-1 and the wall 1, and the groove 2-1 is open The width at the location is less than the thickness at the maximum thickness of the boss 1-1 but greater than the thickness t at the junction of the end of the boss 1-1 and the wall 1, and the convex portion 1-1 is embedded in the groove of the recess 2-1; the bottom of the pile 2 The rail 4 is provided with a chain cutter 3, and the rail 4 is provided with a chain cutter 3, and the chain cutter 3 is composed of a chain 3-1 and a cutter 3-2 mounted on the chain 3-1. 2 At the bottom of the rock, the excavated rock at the bottom of the pile 2 is brought up to the top by the chain knife 3 running up and down, and the pile 2 and the bottom chain knife 3 are simultaneously operated downward.

The invention has the advantages that the interface between the wall 1 and the pile 2 is composed of a boss and a groove, and the connection is concave and convex, and the connection is safe and reliable. The wall 1 and the pile 2 themselves have a chain cutter for excavating the bottom rock, the factory prefabricated wall and Piles, on-site block or overall decline, simple construction, short construction period and low cost.

DRAWINGS

1 is a partial schematic view of a prefabricated underground building in which the wall 1 and the pile 2 are integrally formed, and is also a structural schematic view of the structure of the boss 1-1 of the wall 1 and the groove 2-1 of the pile 2 adopting a concave-convex embedded structure. It is also a schematic diagram of the thickness t of the joint between the end of the boss 1-1 and the wall 1;

2 is a schematic view of the A direction of FIG. 1 and a structural view of the construction wall 1 embedded in the grooves 2-1 of the two piles 2, and is also driven by the driving power unit 5-1, the spoil processing unit 5-2 and the frame. 5-3 is a schematic structural view of a chain cutter driving device 5;

Figure 3 is a BB view of Figure 2 (with the chain cutter 3 removed), and is also a schematic view of the structure of the rail 4 running on the bottom chain cutter 3 of the wall 1, and also the mud nozzle 6-1 of the mud pipeline device 6 on the wall 1-1. And a schematic view of the structure of the mud pipeline 6-2;

4 is a schematic structural view of the chain cutter 3, and is also a schematic structural view of the chain 3-1 and the cutter 3-2;

FIG. 5 is a schematic structural view of another space-curable chain cutter 3;

Figure 6 is a schematic view showing the structure of a pile 2A having two grooves 2-1 on the same straight line;

Figure 7 is a schematic view showing the structure in which the two guide rails 2-2 are inserted into the two recesses 2-1 of the pile 2A, and the chain cutter 3 is mounted in the guide rail 2-2;

Figure 8 is a schematic structural view showing the construction state of the driving device 5 on which the chain cutter 3 is attached to the pile 2A;

Figure 9 is a schematic view showing the structure in which the chain cutter 3 runs the rock at the bottom of the excavation pile 2A along the track, and the pile 2A, the guide rail 2-2 and the bottom chain cutter 3 are simultaneously driven downward;

Figure 10 is a schematic view showing the structure of the removal of the driving device 5 and the chain cutter 3 after the pile 2A reaches the set depth;

Figure 11 is a schematic view showing the structure of the pile 2A provided with the chain cutter running rail 4 on both sides of the grooveless 2-1, and also the structure of the side cover 7 having the bottom edge of the outer side of the rail 4;

Figure 12 is a schematic view showing the structure in which the two-step block 2-3 is inserted into the two grooves 2-1 of the pile 2A, and the chain cutter 3 is attached to the rail 4 on the bottom and side of the pile 2A;

Figure 13 is a schematic view showing the structure of the driving device 5 in which the chain cutter 3 is attached to the pile 2A;

Figure 14 is a schematic view showing the structure in which the chain cutter 3 runs the rock at the bottom of the excavation pile 2A along the track, and the pile 2, the stopper 2-3 and the bottom chain cutter 3 are simultaneously driven downward;

Figure 15 is a schematic view showing the structure after removing the driving device 5 and the chain cutter 3 and pulling out the stopper 2-3;

Figure 16 is a schematic view showing the structure of the pile 2B of the two grooves 2-1 at right angles to each other;

Figure 17 is the guide rail 2-2 inserted into the groove 2-1 of the pile 2B, the stopper 2-3 is inserted into the other groove 2-1 of the pile 2B, on the rail 4 at the bottom and sides of the pile 2B and the guide rail 2 -2 is a schematic structural view of the chain cutter 3 installed therein;

Figure 18 is a schematic view showing the construction state in which the driving device 5 for attaching the chain cutter 3 to the pile 2B is formed;

Figure 19 is a schematic view showing the structure of the rock mass at the bottom of the excavation pile 2B along the track, the pile 2, the guide rail 2-2, the stopper 2-3 and the bottom chain cutter 3 simultaneously running downward;

Figure 20 is a schematic view showing the structure after removing the driving device 5 and the chain cutter 3, and pulling out the guide rail 2-2 and the stopper 2-3;

Figure 21 is a schematic view showing the structure of a pile 2C having three grooves 2-1;

Figure 22 is a schematic view showing the structure in which the two guide rails 2-2 are inserted into the pile 2C, the stoppers 2-3 are inserted into the other recesses 2-1 of the pile 2C, and the chain cutters 3 are mounted in the guide rails 2-2;

Figure 23 is a schematic view showing the structure of the driving device 5 in which the chain cutter 3 is attached to the pile 2C;

Figure 24 is a schematic view showing the structure of the rock mass at the bottom of the excavation pile 2C along the track, the pile 2, the guide rail 2-2, the stopper 2-3 and the bottom chain cutter 3 simultaneously running downward;

Figure 25 is a schematic view showing the structure of the pile 2C after the driving device 5 and the chain cutter 3 are removed, and the guide rail 2-2 and the stopper 2-3 are pulled out;

Figure 26 is a schematic view showing the structure of a pile 2D having four grooves 2-1;

Figure 27 is a schematic view showing the structure in which the two guide rails 2-2 and the two stoppers 2-3 are inserted into the recesses 2-1 of the pile 2D, and the chain cutters 3 are mounted in the guide rails 2-2;

28 is a schematic structural view showing a state in which the driving device 5 for attaching the chain cutter 3 to the pile 2D is formed;

Figure 29 is a schematic view showing the structure of the rock mass at the bottom of the excavation pile 2D along the track, the pile 2, the guide rail 2-2, the stopper 2-3 and the bottom chain cutter 3 simultaneously running downward;

Figure 30 is a schematic view showing the structure of the pile 2D after the drive unit 5 and the chain cutter 3 are removed, and the guide rail 2-2 and the stopper 2-3 are pulled out.

1 is the wall of the assembled underground building; 1-1 is the boss at the interface of the wall 1; 2 is the grooved pile of the assembled underground building, which has 2A, 2B, 2C and 2D structures; 2A is There are two grooves 2-1 on the same line; 2B are piles with two grooves 2-1 at right angles; 2C is a pile with three grooves 2-1; 2D has four grooves 2 -1 pile; 2-1 is the groove at the interface of pile 2; 2-2 is the guide rail embedded in the groove when the pile 2 is constructed, and the guide rail is pulled out after the construction is completed; 2-3 is the groove when the pile 2 is constructed 2-1 embedded stopper, pull out the stopper after construction; 3 is a chain cutter for excavating rock and soil, consisting of chain 3-1 and cutter 3-2 mounted on chain 3-1; 3-1 is a chain constituting the chain cutter 3; 3-2 is a cutter constituting the chain cutter 3; 4 is a rail running the chain cutter 3 at the bottom or side of the wall 1 or the pile 2; 5 is a chain cutter driving device, driven by the power unit 5-1 , spoil disposal device 5-2 and frame 5-3; 5-1 is the drive power device; 5-2 is the spoil treatment device; 5-3 is the frame; 6 is the mud pipeline device; 6-1 Is the mud nozzle on the bottom of the wall 1 or the pile 2; 6-2 is the mud pipeline inside the wall 1 or the pile 2; 7 is the rail 1 on the wall 1 or the pile 2 Side of the bottom-side corner edge of the cover strip; t is from a thickness of 1-1 and a trailing end wall connecting boss.

detailed description

The prefabricated underground building comprises a wall 1 and a grooved pile 2, and the interface between the wall 1 and the pile 2 is composed of a boss and a groove to form a concave-convex embedded structure, and the interface of the wall 1 is provided with a boss 1-1, and the interface of the pile 2 The groove 2-1 is provided, and the thickness of the maximum thickness of the boss 1-1 is greater than the thickness of the joint between the end of the boss 1-1 and the wall 1, and the width of the opening of the groove 2-1 is smaller than the boss 1- 1 The thickness at the maximum thickness is greater than the thickness at the junction of the end of the boss 1-1 and the wall 1, the convex portion 1-1 is embedded in the groove of the recess 2-1; the bottom of the pile 2 is provided with the track 4 for running the chain cutter 3. During the construction, the chain 4 is equipped with a chain cutter 3, and the chain cutter 3 is composed of a chain 3-1 and a cutter 3-2 mounted on the chain 3-1. When the chain cutter 3 works, the rock at the bottom of the pile 2 is excavated, from bottom to top. The running chain cutter 3 brings the excavated geologic soil at the bottom of the pile 2 to the upper side, and the pile 2 and the bottom chain cutter 3 simultaneously run downward.

The construction method is to first construct the pile 2 after the construction of the wall 1.

The construction method is to first construct the pile 2 and the construction wall 1 .

When the pile 2 is constructed, the guide rail 2-2 is embedded in the groove, and the guide rail 2-2 is provided with a track on which the chain cutter 3 travels, and after the construction of the pile 2 is completed, the guide rail 2-2 is pulled out.

When the pile 2 is constructed, a stopper 2-3 is embedded in the groove, and after the construction of the pile 2 is completed, the stopper 2-3 is pulled out.

The pile 2 is provided with two grooves 2-1 on the same straight line, and the construction method is divided into the A method and the B method. The specific steps are as follows:

Method A:

1) Precast pile 2 and guide rail 2-2, and transported to the site;

2) inserting the two guide rails 2-2 into the two recesses 2-1 of the pile 2;

3) mounting the chain cutter 3 on the rail 4 at the bottom of the pile 2 and in the guide rail 2-2;

4) mounting the drive device of the chain cutter 3, etc.;

5) Starting the driving device, the chain cutter 3 runs the rock and soil at the bottom of the excavation pile 2 along the track, and the excavated geotechnical soil at the bottom of the pile 2 is brought to the top by the chain knife 3 running downwards, the pile 2, the guide rail 2-2 and The bottom chain cutter 3 runs downward at the same time;

6) After the pile 2 reaches the set depth, the drive unit and the chain cutter are removed;

7) Pull out the guide rail 2-2;

Method B:

1) Precast pile 2 and stop 2-3, and transported to the site, the two sides of the pile 2 without groove 2-1 are provided with the track 4 running by the chain cutter 3;

2) insert two blocks 2-3 into the two grooves 2-1 of the pile 2;

3) mounting a chain cutter 3 on the bottom and side rails 4 of the pile 2;

4) mounting the drive device of the chain cutter 3, etc.;

5) Start the driving device, the chain cutter 3 runs the rock and soil at the bottom of the excavation pile 2 along the track, and the excavated rock soil at the bottom of the pile 2 is brought to the top by the chain knife 3 running downwards, the pile 2, the stop block 2-3 Running down with the bottom chain cutter 3 at the same time;

6) After the pile 2 reaches the set depth, the drive device and the chain cutter 3 are removed;

7) Pull out the stop 2-3.

The pile 2 is provided with two grooves 2-1 at right angles to each other, and the specific construction method steps are as follows:

1) Prefabricated pile 2, guide rail 2-2 and stop 2-3, and transported to the site;

2) insert the guide rail 2-2 into the groove 2-1 of the pile 2, the pile 2 is located on the side opposite the guide rail 2-2 on the side of the track 4 with the chain knife 3 running;

3) inserting the stopper 2-3 into the other groove 2-1 of the pile 2;

4) mounting the chain cutter 3 on the rail 4 at the bottom and sides of the pile 2 and in the guide rail 2-2;

5) mounting the drive device of the chain cutter 3, etc.;

6) Starting the driving device, the chain cutter 3 runs the rock soil at the bottom of the excavation pile 2 along the track, and the excavated rock soil at the bottom of the pile 2 is brought to the top by the chain knife 3 running downwards and upwards, the pile 2, the guide rail 2-2, The stopper 2-3 and the bottom chain cutter 3 are simultaneously operated downward;

7) after the pile 2 reaches the set depth, the drive device and the chain cutter 3 are removed;

8) Pull out the guide rail 2-2 and the stopper 2-3.

The pile 2 is provided with three grooves 2-1, and the specific construction method steps are as follows:

2) inserting the two guide rails 2-2 into the two grooves 2-1 of the pile 2 which are in the same straight line;

3) inserting the stopper 2-3 into the other groove 2-1 of the pile 2;

4) mounting the chain cutter 3 on the rail 4 at the bottom of the pile 2 and in the guide rail 2-2;

5) mounting the drive device of the chain cutter 3, etc.;

8) Pull out the guide rail 2-2 and the stopper 2-3.

The pile 2 is provided with four grooves 2-1, and the specific construction steps are as follows:

3) Insert the two stops 2-3 into the other two grooves 2-1 of the pile 2;

5) mounting the drive device of the chain cutter 3, etc.;

8) Pull out the guide rail 2-2 and the stopper 2-3.

The invention is further described below in conjunction with the drawings:

As shown in FIG. 1 to FIG. 5, the assembled underground building includes a wall 1 and a groove pile 2, and the interface between the wall 1 and the pile 2 is composed of a boss and a groove to form a concave-convex embedded structure, and the interface of the wall 1 is provided with a convex portion. Table 1-1, the interface of the pile 2 is provided with a groove 2-1, the thickness of the maximum thickness of the boss 1-1 is greater than the thickness t of the junction of the end of the boss 1-1 and the wall 1, the groove 2 1 The width at the opening is smaller than the thickness at the maximum thickness of the boss 1-1 but larger than the thickness t at the junction of the end of the boss 1-1 and the wall 1, and the convex portion 1-1 is embedded in the groove of the recess 2-1; The bottom of the bottom is provided with a track 4 for running the chain cutter 3. During the construction, the track 4 is provided with a chain cutter 3, and the chain cutter 3 is composed of a chain 3-1 and a cutter 3-2 mounted on the chain 3-1 to drive the power unit 5- 1 drive chain cutter 3, when the chain cutter 3 works, only the rock soil at the bottom of the wall 1 is excavated, and the excavated rock soil at the bottom of the wall 1 is brought to the upper by the chain knife 3 running downward and upward, and the device 5-2 takes the chain cutter 3 from The rock soil brought up at the bottom of the wall 1 is separated from the chain cutter 3, and the wall 1 and the bottom chain cutter 3 are simultaneously operated downward; the mud pipeline device 6 is composed of a mud nozzle 6-1 and a wall 1 or pile on the bottom of the wall 1 or pile 2. 2 internal pipeline 6-2; first construction pile 2 after construction wall 1, pile 2 When guide grooves embedded 2-2, 2-2 are equipped with guide rails running in the chain blade 3, after the pull rails 2 Pile 2-2.

As shown in Fig. 6 to Fig. 10, the pile 2A has two grooves 2-1 on the same straight line. The specific steps of the A method are as follows:

1) Precast pile 2A and guide rail 2-2, and transported to the site;

2) inserting the two guide rails 2-2 into the two recesses 2-1 of the pile 2A;

3) mounting the chain cutter 3 on the rail 4 at the bottom of the pile 2A and in the guide rail 2-2;

4) mounting the drive device of the chain cutter 3, etc.;

5) Start the drive device, the chain cutter 3) Run the rock and soil at the bottom of the excavation pile 2A along the track, and carry the excavated rock at the bottom of the pile 2A to the top by the chain knife 3 running up and down, the pile 2A, the guide rail 2-2 Running down with the bottom chain cutter 3 at the same time;

6) after the pile 2A reaches the set depth, the drive device 5 and the chain cutter 3 are removed;

7) Pull out the guide rail 2-2.

As shown in FIG. 11 to FIG. 15, the pile 2A is provided with a chain cutter running rail 4 on both sides of the grooveless 2-1, and a stopper 2-3 is embedded in the groove when the pile 2A is constructed. Out of the block 2-3, the specific steps of the B method construction are as follows:

1) Prefabricated pile 2A and stop 2-3, and transported to the site, the two sides of the pile 2A without groove 2-1 are provided with the track 4 running by the chain cutter 3;

2) insert two blocks 2-3 into the two grooves 2-1 of the pile 2A;

3) mounting the chain cutter 3 on the bottom and side rails 4 of the pile 2A;

4) mounting the drive device of the chain cutter 3, etc.;

5) Start the driving device, the chain cutter 3 runs along the track, the rock and soil at the bottom of the excavation pile 2A, and the excavated geotechnical soil at the bottom of the pile 2A is brought to the top by the chain knife 3 running up and down, the pile 2A, the stopper 2-3 Running down with the bottom chain cutter 3 at the same time;

6) After the pile 2A reaches the set depth, the drive device and the chain cutter 3 are removed;

7) Pull out the stop 2-3.

As shown in Fig. 16 to Fig. 20, the specific construction method of the pile 2B is as follows:

1) Precast pile 2B, guide rail 2-2 and stop 2-3, and transported to the site;

2) insert the guide rail 2-2 into the groove 2-1 of the pile 2B, the pile 2B is located on the side opposite the guide rail 2-2 on the side of the track 4 with the chain knife 3 running;

3) insert the stopper 2-3 into the other groove 2-1 of the pile 2B;

4) mounting the chain cutter 3 on the rail 4 at the bottom and side of the pile 2B and in the guide rail 2-2;

5) mounting the drive device of the chain cutter 3, etc.;

6) Start the driving device, the chain cutter 3 runs the rock and soil at the bottom of the excavation pile 2B along the track, and the excavated rock and soil at the bottom of the pile 2B is brought to the top by the chain knife 3 running downward and upward, the pile 2B and the guide rail 2-2. The stopper 2-3 and the bottom chain cutter 3 are simultaneously operated downward;

7) After the pile 2B reaches the set depth, the drive device and the chain cutter 3 are removed;

8) Pull out the guide rail 2-2 and the stopper 2-3.

As shown in Fig. 21 to Fig. 25, the concrete construction method of the pile 2C is as follows:

1) Precast pile 2C, guide rail 2-2 and stop 2-3, and transported to the site;

2) inserting the two guide rails 2-2 into the two grooves 2-1 of the pile 2C in the same straight line;

3) insert the stopper 2-3 into the other groove 2-1 of the pile 2C;

4) mounting the chain cutter 3 on the rail 4 at the bottom of the pile 2C and in the guide rail 2-2;

5) mounting the drive device of the chain cutter 3, etc.;

6) Starting the driving device, the chain cutter 3 runs the rock and soil at the bottom of the excavation pile 2C along the track, and the excavated rock and soil at the bottom of the pile 2C is brought to the top by the chain knife 3 running downward and upward, the pile 2C and the guide rail 2-2. The stopper 2-3 and the bottom chain cutter 3 are simultaneously operated downward;

7) After the pile 2C reaches the set depth, the drive device and the chain cutter 3 are removed;

8) Pull out the guide rail 2-2 and the stopper 2-3.

As shown in Fig. 26 to Fig. 30, the specific construction method of the pile 2D is as follows:

1) Precast pile 2D, guide rail 2-2 and stop 2-3, and transported to the site;

2) inserting the two guide rails 2-2 into the two grooves 2-1 of the pile 2D in the same straight line;

3) Insert the two stops 2-3 into the other two grooves 2-1 of the pile 2D;

4) mounting the chain cutter 3 on the rail 4 at the bottom of the pile 2D and in the guide rail 2-2;

5) mounting the drive device of the chain cutter 3, etc.;

6) Start the driving device, the chain cutter 3 runs along the track, the rock and soil at the bottom of the excavation pile 2D, and the excavated geotechnical soil at the bottom of the pile 2D is brought to the top by the chain knife 3 running downwards, the pile 2D, the guide rail 2-2, The stopper 2-3 and the bottom chain cutter 3 are simultaneously operated downward;

7) After the pile 2D reaches the set depth, the drive device and the chain cutter 3 are removed;

8) Pull out the guide rail 2-2 and the stopper 2-3.

Claims

A groove pile for a fabricated underground building, characterized in that the assembled underground building comprises a wall (1) and a groove pile (2), and the interface of the wall (1) and the pile (2) is supported by a boss and a groove The concave-convex embedded structure is formed, and the interface of the wall (1) is provided with a boss (1-1), and the interface of the pile (2) is provided with a groove (2-1), and the maximum of the boss (1-1) The thickness at the thickness is greater than the thickness at the junction of the end of the boss (1-1) and the wall (1), and the width at the opening of the groove (2-1) is smaller than the thickness at the maximum thickness of the boss (1-1) but greater than The thickness of the joint between the end of the boss (1-1) and the wall (1), the convex portion (1-1) is embedded in the groove of the concave portion (2-1); the bottom of the pile (2) is provided with a running chain knife (3) The track (4), the chain knife (3) is attached to the track (4) during construction, the chain knife (3) is chained (3-1) and the tool (3-2) mounted on the chain (3-1) Composition, the chain knife (3) works to excavate the rock at the bottom of the pile (2), and the excavated rock at the bottom of the pile (2) is brought to the top, the pile (2) and the bottom by the chain knife (3) running downwards and upwards. The chain knife (3) runs down at the same time.
A groove pile for a fabricated underground building according to claim 1, characterized in that the construction method is a construction pile (1) after the construction wall (1).
A groove pile for a fabricated underground building according to claim 1, characterized in that the construction method is a construction pile (2) and a construction wall (1).
A groove pile for a fabricated underground building according to claim 3, characterized in that the pile (2) is embedded with a guide rail (2-2), a guide rail (2-2) There is a track in which the chain knife (3) walks, and the pile (2) is pulled out after the construction of the pile (2).
A groove pile for a fabricated underground building according to claim 3, characterized in that the pile (2) is embedded with a stopper (2-3) and a pile (2) during construction. Pull out the stop (2-3) after the end.
A groove pile for a fabricated underground building according to claims 4 and 5, characterized in that said pile (2) is provided with two grooves (2-1) on the same straight line, The construction method is divided into the A method and the B method. The specific steps are as follows:

Method A:

1) Precast piles (2) and guide rails (2-2) are transported to the site;

2) Insert the two guide rails (2-2) into the two grooves (2-1) of the pile (2);

3) Install a chain cutter (3) on the rail (4) at the bottom of the pile (2) and in the guide rail (2-2);

4) mounting the drive device of the chain cutter (3), etc.;

5) Start the drive device, the chain cutter (3) runs the rock at the bottom of the excavation pile (2) along the track, and the excavated rock at the bottom of the pile (2) is brought up to the top by the chain knife (3) running downwards and upwards. The pile (2), the guide rail (2-2) and the bottom chain cutter (3) run downward simultaneously;

6) After the pile (2) reaches the set depth, the drive unit and the chain cutter are removed;

7) Pull out the guide rail (2-2);

Method B:

1) Precast pile (2) and stop (2-3), and transported to the site, the pile (2) without grooves (2-1) on both sides is provided with a chain knife (3) running track (4);

2) Insert two blocks (2-3) into the two grooves (2-1) of the pile (2);

3) Install a chain knife (3) on the bottom and side rails (4) of the pile (2);

4) mounting the drive device of the chain cutter (3), etc.;

5) Start the drive device, the chain cutter (3) runs the rock at the bottom of the excavation pile (2) along the track, and the excavated rock at the bottom of the pile (2) is brought up to the top by the chain knife (3) running downwards and upwards. The pile (2), the stop (2-3) and the bottom chain cutter (3) run downward simultaneously;

6) After the pile (2) reaches the set depth, the drive unit and the chain cutter (3) are removed;

7) Pull out the stop (2-3).
A groove pile for a fabricated underground building according to claim 1, wherein said pile (2) is provided with two grooves (2-1) at right angles to each other, and the concrete construction method thereof Proceed as follows:

1) Precast piles (2), guide rails (2-2) and stops (2-3) are transported to the site;

2) Insert the guide rail (2-2) into the groove (2-1) of the pile (2), and the pile (2) is located on the side opposite to the guide rail (2-2) with the track of the chain cutter (3) running ( 4);

3) insert the stopper (2-3) into the other groove (2-1) of the pile (2);

4) Install a chain knife (3) on the rail (4) at the bottom and side of the pile (2) and the guide rail (2-2);

5) Mounting the drive device of the chain cutter (3), etc.;

6) Start the drive device, the chain cutter (3) runs the rock at the bottom of the excavation pile (2) along the track, and the excavated rock at the bottom of the pile (2) is brought to the top by the chain knife (3) running downwards and upwards. The pile (2), the guide rail (2-2), the stopper (2-3) and the bottom chain cutter (3) are simultaneously operated downward;

7) After the pile (2) reaches the set depth, remove the drive unit and the chain knife (3);

8) Pull out the guide rail (2-2) and the stopper (2-3).
A groove pile for a fabricated underground building according to claim 3, characterized in that the pile (2) is provided with three grooves (2-1), and the specific construction method steps are as follows:

1) Precast piles (2), guide rails (2-2) and stops (2-3) are transported to the site;

2) Insert the two guide rails (2-2) into the two grooves (2-1) of the pile (2) in the same straight line;

3) insert the stopper (2-3) into the other groove (2-1) of the pile (2);

4) Install a chain knife (3) on the rail (4) at the bottom of the pile (2) and in the guide rail (2-2);

5) Mounting the drive device of the chain cutter (3), etc.;

6) Start the drive device, the chain cutter (3) runs the rock at the bottom of the excavation pile (2) along the track, and the excavated rock at the bottom of the pile (2) is brought to the top by the chain knife (3) running downwards and upwards. The pile (2), the guide rail (2-2), the stopper (2-3) and the bottom chain cutter (3) are simultaneously operated downward;

7) After the pile (2) reaches the set depth, remove the drive unit and the chain knife (3);

8) Pull out the guide rail (2-2) and the stopper (2-3).
A groove pile for a fabricated underground building according to claim 3, characterized in that the pile (2) is provided with four grooves (2-1), and the specific construction method steps are as follows:

1) Precast piles (2), guide rails (2-2) and stops (2-3) are transported to the site;

2) Insert the two guide rails (2-2) into the two grooves (2-1) of the pile (2) in the same straight line;

3) Insert the two stops (2-3) into the other two grooves (2-1) of the pile (2);

4) Install a chain knife (3) on the rail (4) at the bottom of the pile (2) and in the guide rail (2-2);

5) Mounting the drive device of the chain cutter (3), etc.;

6) Start the drive device, the chain cutter (3) runs the rock at the bottom of the excavation pile (2) along the track, and the excavated rock at the bottom of the pile (2) is brought to the top by the chain knife (3) running downwards and upwards. The pile (2), the guide rail (2-2), the stopper (2-3) and the bottom chain cutter (3) are simultaneously operated downward;

7) After the pile (2) reaches the set depth, remove the drive unit and the chain knife (3);

8) Pull out the guide rail (2-2) and the stopper (2-3).