WO2021047095A1

WO2021047095A1 - Construction method for continuous pile forming

Info

Publication number: WO2021047095A1
Application number: PCT/CN2019/126152
Authority: WO
Inventors: 刘现刚; 刘斌; 熊小林; 薛小波
Original assignee: 江西基业科技有限公司
Priority date: 2019-09-09
Filing date: 2019-12-18
Publication date: 2021-03-18
Also published as: CN111335810A

Abstract

Disclosed is a construction method for continuous pile forming, the method comprising: a, arranging a pile casing assembly (12) of a drilling machine at the position of a pile hole; b, sinking a drill rod assembly (14) of the drilling machine to enable the drill rod assembly to penetrate downwards through the pile casing (13) for drilling, wherein when a cutting assembly on the drill rod assembly (14) extends downwards and out of the pile casing (13) and is then unfolded, the hole wall of the pile hole is rotationally cut along with the rotation of the drill rod assembly (14), and reaming is achieved; c, achieving wall protection of the pile hole by sinking the pile casing (13) along with the drill rod assembly (14) and a cutting component (2); d, lifting the drill rod assembly (14) by a pre-set height after the pile casing (13) sinks to a pre-set position and the drill rod assembly (14) drills to the designed depth, and reserving the pile casing (13) in the pile hole; e, injecting concrete into the pile hole in a pressing manner by means of the drill rod assembly (14); f, installing a soil acquisition device (120) on the drill rod assembly (14), sinking the drill rod assembly (14), and the soil acquisition device (120) acquiring a soil body or soil slurry at the top of the concrete; g, lifting the drill rod assembly (14) and the soil acquisition device (120) to the outside of the pile hole; and h, lifting the pile casing assembly (12) out of the pile hole. The construction method can greatly improve the construction efficiency of continuous pile forming.

Description

Construction method for continuous pile formation

Technical field

The invention relates to a construction method for continuous pile formation.

Background technique

In the prior art, the use of long auger drilling rigs for drilling can not efficiently perform the steps of drilling, wall protection and soil extraction. This is mainly due to the single function of the used drilling rig, which can only achieve the functions of drilling and wall protection; If you need to take out the concrete in the pile hole, you need to use another set of equipment to achieve. In addition, in the prior art, although the protective tube can be used to allow the protective tube to sink with the drill rod when drilling, but due to the The inner diameter is larger than the drill diameter of the drill pipe, which causes the soil on the hole wall to be broken when the protective tube sinks, resulting in a slower sinking speed and affecting construction efficiency.

For example, Chinese patent document CN208088287U discloses a semi-contained barrel pressure grouting pile construction equipment, including an original soil borrowing rig, an original soil borrowing pressure grouting pile frame, a crawler crane, an excavator, a concrete pump, and a protection cylinder. The soil drilling rig has built-in spiral blades, the top of the protective tube is matched with a hydraulic vibrating hammer, the crawler crane is used for hoisting the steel cage, the excavator is used to assist in the transfer of the soil taken out by the original soil extracting rig, the protective tube The length of the pile is half of the pile height. The equipment realizes that the spiral blades as drilling parts are built into the protective tube and integrated into a device, and then the protective tube can be buried while drilling, which can not only reduce the use of equipment, that is, no separate protective tube is needed. The equipment is lowered and the construction efficiency is greatly improved. However, because the spiral blades are built into the protective cylinder, the spiral blades in the device are drilled with a hole diameter less than or equal to the inner diameter of the protective cylinder, so that the soil on the hole wall will cause greater friction when the protective cylinder descends. Therefore, the upper part of the protective cylinder of the equipment is also equipped with a hydraulic vibrating hammer, which is used to perform high-frequency impact on the protective cylinder to promote the lowering of the protective cylinder.

For example, Chinese Patent Document CN208220641U discloses a cylindrical soil extracting drill bit, which includes a cylindrical body. The bottom of the cylindrical body is provided with a fixed plate and a rotating piece. The fixed plate has a soil inlet, and the rotating piece can rotate along the circumference of the cylindrical body. The soil inlet is opened and closed, and a digging blade extending obliquely downward is provided on one side edge of the rotating blade close to the soil inlet. After the cylinder is full, the cylinder is reversed, and the excavating blade is affected by the resistance of the soil below, so that the rotating blade closes the soil inlet, thereby avoiding the leakage of the soil when the cylinder is lifted upwards. The problem of the above design is that in order to finally take the soil out of the hole after every forward rotation of the soil, the soil extractor must be reversed; this structure causes the operation to be more complicated and the efficiency is low, and the rotary blade and the digging blade linked with it are provided The structure is also complicated.

Summary of the invention

Therefore, the technical problem to be solved by the present invention lies in the technical problem of low construction efficiency in the process of drilling, wall protection, soil extraction, and pile formation in the prior art piling construction method, thereby proposing a method for drilling, wall protection, and extraction. The construction method of continuous pile formation with higher construction efficiency during soil and pile formation.

In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

The construction method for continuous pile formation of the present invention includes:

a. Place the protective barrel assembly of the drilling rig at the position of the pile hole; wherein the drilling rig includes: a frame; a protective barrel assembly, installed on the frame, including a protective barrel for protecting the hole wall; a drill rod assembly , Installed on the frame, having an axial through structure, and at least partially movably embedded in the protective barrel assembly; a drill rod power component, connected with the drill rod assembly, to provide power for the rotation of the drill rod assembly A drive mechanism, installed on the frame, connected with the drill rod assembly and the protective barrel assembly, and used to respectively realize the vertical nesting movement of the protective barrel assembly and the drill rod assembly; cutting components, It is movably connected to the drill rod assembly in a radially expandable manner, and is adapted to cooperate with the drill rod assembly to achieve drilling, wherein the drill diameter of the drill rod assembly in the expanded state of the cutting member is larger than that in the contracted state The drill diameter is larger than the inner diameter of the protective cylinder, and the drill diameter of the cutting component in the contracted state is smaller than the inner diameter of the protective cylinder; soil sampling device, wherein the soil sampling device and the drill rod assembly can be Detachable and suitable for rotating with the drill rod assembly, and suitable for axially entering the inner cavity of the protective cylinder with the drill rod assembly;

b. Sinking the drill rod assembly of the drill rig to drill down through the protective tube, when the cutting part on the drill rod assembly extends downwards from the protective tube and then is deployed, and follow the drill rod Rotation of the component rotates and cuts the hole wall of the pile hole to realize hole reaming;

c. Follow the drill rod assembly and the cutting component to sink the protective tube to realize the wall protection of the pile hole;

d. After the protective tube sinks to a predetermined position and the drill rod assembly is drilled to the designed depth, the drill rod assembly is raised to a predetermined height, and the cutting component is contracted, and the protective tube is retained In the pile hole;

e. Pressure-inject concrete into the pile hole through the axial through structure of the drill rod component, and allow the drill rod assembly to rise above the pile hole through the protective tube;

f. Install the soil borrowing device on the drill rod assembly, and enter the protective cylinder again to sink the drill rod assembly and the soil borrowing device, by rotating the drill rod assembly and the soil borrowing device , Taking the soil or slurry on the top of the concrete into the soil borrowing device;

g. Raise the drill rod assembly and the soil borrowing device through the protective tube to above the pile hole;

h. Lift the protective tube assembly out of the pile hole.

The construction method for continuous pile formation as described above, wherein the drill rod assembly has a power end and a drilling end opposite to the power end; the cutting component radially expands in a direction from the drilling end to the The power end is expanded.

In the above-mentioned construction method for continuous pile formation, the soil borrowing device includes: a cylinder with a bearing plate at the bottom; wherein the bearing plate is provided with an earth inlet facing the working rotation direction of the cylinder; The soil inlet is provided with a sealing member that is connected to the bearing plate loosely and is adapted to unfold the loose leaf inside the cylinder in a direction opposite to the working rotation direction, and the sealing member is suitable for opening the soil to the soil inlet. The loose-leaf sealing is performed, wherein the angle at which the sealing member expands the loose-leaf toward the inner side of the cylinder is less than 90 degrees.

In the construction method for continuous pile formation, the drill rod assembly includes: a drill rod body, a spiral blade, arranged on the drill rod body, and a drill bit, which is arranged on the drill rod body, and is located at the drill rod body. The drilling end; wherein the cutting component is provided on one or more of the drill pipe main body, the spiral blade, and the drill bit; the soil sampling device is detachable from the drill bit through the cylinder connection.

In the construction method for continuous pile formation as described above, the drill rod member has a movement restriction structure that restricts the movement of the cutting member in the unfolding direction.

In the construction method for continuous pile formation as described above, the cutting member and the drill rod member are connected by at least a spring member, and are hinged on the outer edge of the spiral blade.

In the construction method of continuous pile formation, the soil inlet is formed by at least the edges of the first bearing board part and the second bearing board part of the bearing board, wherein the first bearing board part is in the The cylinder is partially arranged lower than the second bearing plate in the axial direction.

In the above-mentioned construction method of continuous pile formation, the sealing member is an elastic plate.

The above-mentioned construction method of continuous pile formation, wherein, in step e, before the concrete injection, further includes: drilling the drill rod assembly to a design depth again, and raising the drill rod assembly to a predetermined height.

In the construction method for continuous pile formation as described above, the cylinder body includes at least two cylinder petals and a top cover part connected with the cylinder flap loose leaf, wherein the cylinder petals and the top cover part are hinged to form a joint The structure of the cylinder.

The above-mentioned continuous pile construction method further includes a step of inserting a steel cage into the concrete after the above-mentioned step g.

Compared with the prior art, the technical solution of the present invention has the following technical effects:

1. The construction method of the present invention for continuous pile formation of the present invention includes: a. placing the protective barrel assembly of the drilling rig at the position of the pile hole; wherein the drilling rig includes: a frame; a protective barrel assembly, Mounted on the frame, including a protective tube for protecting the hole wall; a drill rod assembly, mounted on the frame, having an axial through structure, and at least partially movably embedded in the protective tube assembly; The drill rod power component is connected to the drill rod assembly to provide power for the rotation of the drill rod assembly; the drive mechanism is installed on the frame and is connected to the drill rod assembly and the barrel guard assembly for separate Realize the up and down movement of the protective barrel assembly and the drill rod assembly; the cutting component is movably connected to the drill rod assembly in a radially expandable manner, and is suitable for cooperating with the drill rod assembly to achieve drilling, wherein , The drill diameter of the drill rod assembly in the expanded state of the cutting member is greater than the drill diameter in the contracted state and greater than the inner diameter of the protective barrel, and the drill diameter of the cutting member in the contracted state is smaller than the protective barrel The inner diameter of the soil extraction device, wherein the soil extraction device and the drill rod assembly are detachably connected, and are suitable for rotating with the drill rod assembly, and are suitable for axially entering the guard with the drill rod assembly The inner cavity of the barrel; b. sink the drill rod assembly of the drill rig to drill through the protective barrel, and when the cutting part on the drill rod assembly extends downwards from the protective barrel, it is deployed, and then Rotate and cut the hole wall of the pile hole with the rotation of the drill rod assembly to achieve reaming; c. follow the drill rod assembly and the cutting component to sink the protective tube to achieve the pile Hole for wall protection; d. When the protection tube sinks to a predetermined position and the drill rod assembly is drilled to the design depth, the drill rod assembly is raised to a predetermined height, and the cutting component is contracted, and the The protective tube remains in the pile hole; e. After the drill rod assembly is raised by a predetermined height, concrete is injected into the pile hole through the axial through structure of the drill rod component, And make the drill rod assembly pass through the protective tube and rise to the top of the pile hole; f. install a soil sampling device on the drill rod assembly, and enter the protective tube again to sink the drill Rod assembly and the soil sampling device, by rotating the drill rod assembly and the soil sampling device, the soil or soil slurry on the top of the concrete is taken into the soil sampling device; g. lifting the drill The rod assembly and the soil borrowing device pass through the protective tube to above the pile hole; h. Lift the protective tube assembly out of the pile hole.

The above-mentioned pile construction method has the following technical effects:

I. Realize the integration of drilling, wall protection, soil extraction and pile formation into a drilling rig equipment to achieve, so that there is no need to replace equipment in the middle to achieve the corresponding process;

II. Through the above design, it can be realized that the drill diameter of the drill rod assembly is less than or equal to the inner diameter of the protective tube component used to protect the hole wall in the recovery or contraction state, so that the drill rod component can be movably embedded in the In the protective barrel, to realize the function of protecting the wall when the protective barrel can follow the drill rod assembly to move up and down when the drill rod assembly is drilling, and when the cutting component is placed in the unfolded state by operation, the drilling of the drill rod assembly The diameter is larger than the inner diameter of the protective tube, so that the diameter of the hole drilled by the drill rod assembly is at least larger than the inner diameter of the protective tube, so that the frictional resistance of the soil to the protective tube is reduced;

III. Since the drill rod assembly is provided with a radially expandable cutting component, not only can the nesting and following movement of the protective tube be realized, and the effect of wall protection can be realized, but also the drill rod assembly can be passed through without removing the protective tube. The inner cavity of the protective tube is withdrawn, so that higher construction efficiency can be achieved;

IV. Using the above-mentioned soil borrowing device that can be detachably installed on the drill pipe components can realize quick and detachable installation to improve construction efficiency;

2. The structure of the above soil borrowing device can make the soil in the pile hole rotate in the working rotation direction of the cylinder and be brought into the soil inlet; because the sealing part faces the opposite direction of the working rotation direction The loose leaf unfolds to the inner side of the cylinder. Therefore, when the soil is brought into the soil inlet, the sealing member will be squeezed into the cylinder by the soil that is about to enter the cylinder; and because of the sealing The opening angle of the part toward the inside of the cylinder is less than 90 degrees. Therefore, when the cylinder is filled with soil, the soil borrowing device is directly lifted, and the soil inside the cylinder will affect the sealing part. Applying vertical pressure from the inner side to the outer side of the cylinder to press the sealing member against the soil inlet, and since the sealing member and the soil inlet are closed by loose-leaf interference fit, the sealing member A shut-off door can be formed to seal the soil entering the cylinder inside the cylinder. There is no need to adopt a reversal method to realize the sealing in the prior art, and the soil inlet can be sealed by directly lifting the cylinder body after the rotating soil borrowing action is completed. The operation is simple and convenient, and the construction efficiency can be further improved.

3. The radial expansion direction of the cutting component is from the drilling end to the power end. This design can make full use of the gravity of the drill rod assembly and the cooperation of the soil to make the cutting The components remain unfolded during the drilling process.

4. The drill rod component includes: a drill rod body, a spiral blade, which is arranged on the drill rod body, and a drill bit, which is arranged on the drill rod body and is located at the drilling end; wherein, the The cutting component is provided on one or more of the drill rod body, the spiral blade, and the drill bit. The cutting component is arranged on the drillable component, which facilitates the cutting of the soil by the cutting component, thereby improving the construction efficiency.

5. The drill rod has a movement restriction structure that restricts the movement of the cutting component in the unfolding direction; this design can make the movement restriction structure and the gravity of the drill rod component cooperate to keep the expanded cutting component in place In a fully deployed state; especially when the cutting component and the drill rod component are hinged, the drill diameter of the drill rod can be controlled to the maximum, so as to achieve the purpose of reaming, reducing drag, and improving construction efficiency.

6. The cutting component and the drill rod component are connected by at least a spring component; this way, it can help to realize that when the cutting component is in the protective cylinder, the spring component is restricted by the inner wall of the protective cylinder. In a compressed state, the cutting component is in a recovery state; when the cutting component is outside the protective cylinder, the spring component is suitable for radially expanding the cutting component. There is no need to manually operate the cutting component directly to expand or recover (contract) in the radial direction. It is only necessary to extend the drill rod body out of the protective tube, and the elastic recovery of the spring component can be used to support the cutting component. open. Since the unfolding direction of the cutting component is unfolded from the drilling end to the power end, and in a fully radially unfolded state, the length direction of the cutting component is perpendicular to the axial direction of the drill rod body, so When the cutting component is recycled to the protective cylinder, the cutting component is restricted by the inner wall of the protective cylinder in a contracted state, thereby realizing an efficient recycling operation of the drill rod assembly, thereby improving construction efficiency .

7. The soil inlet is formed by at least the edges of the first bearing plate part and the second bearing plate part of the bearing plate, wherein the first bearing plate part is lower than the all sides in the axial direction of the cylinder. The second carrier board is partially arranged. The above design can easily and quickly bring the soil in the pile hole into the cylinder due to the height difference during the rotation of the cylinder.

8. The sealing member is an elastic plate. Since the original shape of the soil inlet may be irregular, or the shape of the soil inlet may change during the working process, the use of an elastic plate can achieve the effect of self-adaptive sealing; and the elastic plate is an elastic rubber plate, which can be The soil inlet further achieves a better sealing effect, and better prevents soil or soil slurry from leaking from the cylinder body into the pile hole, which affects construction efficiency.

9. The cylinder body includes at least two cylinder petals and a top cover part connected with the cylinder flap flap, wherein the cylinder petals and the top cover part are hinged to form the structure of the cylinder body. The above design can achieve a quick effect when removing the soil in the cylinder.

Description of the drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Description of reference signs:

1-Drill pipe component, 2-cutting component, 3-power end, 4-drilling end, 5-flange structure, 6-drill pipe body, 7-spiral blade, 8-drill, 9-spring component, 10 -Concrete pouring equipment, 11-frame, 12-guard tube assembly, 13-guard tube, 14-drill pipe assembly, 15-drive mechanism, 16-winding device, 17-pulley assembly, 18-pulley, 19-pulley Rope, 20-fixed pulley, 21-first fixed pulley, 22-second fixed pulley, 23-cylinder protection power unit, 24-chassis structure, 25-tower structure, 26-rail, 27-tower structure; 28- Drill rod power components; 29-moving pulley; 30-hole wall, 31-pouring pipe; 100-cylinder; 101-carrying board; 102-soil inlet; R-working rotation direction; 103-first bearing board part; 104 -Second bearing plate part; 105-sealing part; 106-tube flap; 107-top cover part; 108-hinge part; 109-connection post; 110-mounting hole; 111-pin; 112-pin hole; 120-take Soil device.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIG. 1, this embodiment provides a drilling rig, including: a frame 11; wherein, it further includes: a barrel protection assembly 12, which is installed on the frame 11, and includes a barrel 13 for protecting the wall of the hole. And the drill rod assembly 14 introduced in the above-mentioned embodiment 1, the drill rod assembly 14 is mounted on the frame 11, includes at least one drill rod component 1 with an axial through structure, and is at least partially movably embedded The drill pipe power component 28 is connected to the drill pipe component to provide power for the rotation of the drill pipe component. Preferably, the drill pipe power component can be connected to the power end of the drill pipe component. More preferably, it can be detachably connected to the power end; the drill further includes a driving mechanism 15 installed on the frame 11 and connected to the barrel guard assembly 12 and the drill rod assembly 14 respectively , Used to realize the vertical nesting movement of the protective tube assembly 12 and the drill rod assembly 14 respectively.

As shown in FIG. 1, the driving mechanism 15 may preferably further include: a hoisting device 16, which may be multiple, and this embodiment shows two, which are installed on the frame 11; and a pulley assembly 17, which is installed on the frame 11; The frame 11 is respectively connected with the hoisting device 16, the protective tube assembly 12 and the drill rod assembly 14; wherein, the pulley assembly 17 includes a plurality of pulleys 18, and is installed on the pulley 18 It is connected with the hoisting device 16 at one end, and the pulley rope 19 connected with the barrel assembly 12 and the drill rod assembly 14 at the other end.

Preferably, the pulley 18 may include: a fixed pulley 20, which further includes a first fixed pulley 21 and a second fixed pulley 22; wherein the hoisting device 16 is adapted to be installed on the first fixed pulley. The pulley rope 19 on the pulley 21 exerts an upward pulling force on the protective tube assembly 12 and the drill rod assembly 14; the hoisting device 16 is adapted to pass through the second fixed pulley 22 The pulley rope 19 applies a downward pulling force to the barrel guard assembly 12 and/or the drill rod assembly 14. Specifically, the pulley rope 19 on the second fixed pulley 22 exerts a downward pulling force on the barrel guard assembly 12 and/or the drill rod assembly 14, depending on the force of the second fixed pulley 22 The installation method, for example, the second fixed pulley 22 has a force-receiving side that accepts pulling down and a force-applying side that applies tension to other objects. Then, the second fixed pulley 22 needs to be installed in a suitable position, So that the part of the pulley rope 19 on the side of the force can exert a downward pulling force on the component connected to it, and the pulley rope 19 on the side of the force application extends from the second fixed pulley 22 and extends upward to connect to the component. .

The protective tube assembly 12 preferably further includes a protective tube power device 23 installed on the protective tube 13, and the protective tube power device 23 is adapted to provide rotational power for the protective tube 13. Among them, the rotation can be a rotation in one direction, that is, clockwise or counterclockwise, or it can be a periodic alternating clockwise and counterclockwise rotation, that is, what we usually call twisting or shaking.

The frame preferably includes: a chassis structure 24, the hoisting device 16 is installed on the chassis structure 24; a tower column structure 25, the lower end of the tower column structure 25 is installed on the chassis structure 24, and A guide rail 26 is provided; a tower structure 27 is installed at the upper end of the tower column structure 25; wherein the pulley assembly 17 is installed on the tower structure 27; the barrel guard assembly 12 and the drill rod assembly 14 are respectively Installed on the guide rail 26, the guide rail 26 provides a guide for the up and down movement of the protective barrel assembly 12 and the drill rod assembly 14.

As a further improved embodiment, in the drilling rig of this embodiment, the protective barrel power device 23 and the protective barrel 13 are detachably connected, and specifically may be a pin shaft connection. In addition, the pulley rope installed on the pulley 18 is connected to the protective tube power device and the protective tube assembly.

As shown in FIG. 2, the drilling rig of this embodiment further includes a soil borrowing device 120, and the soil borrowing device 120 is detachably connected to the drill rod assembly 14 and is adapted to rotate with the drill rod assembly 14. Wherein, the maximum width of the soil sampling device 120 in the radial direction of the protective tube 13 is smaller than the inner diameter of the protective tube, so that it is suitable for axially passing through the inner cavity of the protective tube along with the drill rod.

As shown in Fig. 3, the soil borrowing device includes: a cylinder body 100 with a bearing plate 101 at the bottom; the bearing plate 101 is provided with a soil inlet 102 facing the working rotation direction R of the cylinder body, wherein: The working rotation direction is the rotation direction when the cylinder body is used for taking soil through rotation; as an optional embodiment, the soil inlet 102 is at least formed by the first bearing plate portion of the bearing plate 101 103 and the edges of the second supporting board portion 104. In this embodiment as shown in FIG. 1, the edges of the side wall of the cylinder 100 can also be formed together. Of course, it can also be composed of only the first supporting board portion 103 and the second supporting board. The bearing plate portion 104 is formed, and the soil inlet 102 in this embodiment does not extend to the position of the side wall; in addition, the first bearing plate portion 103 may be lower than the first bearing plate portion 103 in the axial direction of the cylinder. The two bearing plate parts 104 are arranged. As a preferred embodiment, the first bearing plate part 103 constituting the soil inlet 102 may be a plate inclined toward the outside of the cylinder, and the second bearing plate The plate portion 104 may be horizontal or a plate that is inclined toward the inner side of the cylinder; and the angle between the downward inclination direction of the first bearing board portion 103 and the tangential direction when the cylinder 100 is rotated is less than 90 These specific embodiments are not shown in the drawings. In addition, the soil inlet 102 is provided with a sealing member 105 that is loosely connected to the inner side of the cylinder 100, which is suitable for performing the soil inlet 102 The loose-leaf seal, in particular, the sealing member 105 can be hinged to the inside of the cylinder, so that the soil can enter the cylinder through the soil inlet, which is similar to the way that the soil can be blocked in a hinged manner. For the broken door, for the way of blocking the soil inlet, it is preferable that the sealing member and the soil inlet form an interference fit, so that the sealing member can be overlapped on the first carrying board part 103 and the second carrying board part 104 moves upward to form a seal, and the structure is simple; wherein, the angle of the opening of the sealing member toward the inner side of the cylinder is less than 90 degrees. The cylinder 100 of the soil borrowing device is preferably detachably connected to the working end of the drill rod assembly 14.

The sealing member 105 is an elastic plate, and the elastic plate may preferably be an elastic rubber plate to provide a better self-adaptive sealing effect and a better sealing effect.

In order to be able to quickly take out the soil inside the cylinder 100, for the soil sampling device of this embodiment, the cylinder 100 preferably includes at least two cylinder lobes 106 and a top cover member hinged to the cylinder lobes 106 107, specifically realized by a hinge part 108 provided on the cylinder and located between the tube flap 106 and the top cover part 107, wherein the tube flap 106 and the top cover part 107 are hinged , So that the soil in the cylinder 100 can be moved out of the cylinder 100.

The cylinder 100 of the soil borrowing device needs to be rotated in the working rotation direction to achieve soil borrowing, and the rotation of the cylinder 100 can be driven by an external driving device. The structure connected with the external driving device may be the cylinder body 100 itself, or may be a connection structure provided on the top cover member 107 of the cylinder body 100. This embodiment is a connecting column as shown in FIG. 3 109. As a connection method, a pin hole 112 may also be formed on the connecting column.

As shown in Figure 4, the drill rod assembly of this embodiment includes: a drill rod component 1; wherein, it also includes a cutting component 2, which can be movably connected to the drill rod component 1 in a radially expandable manner, and is suitable for communicating with the drill rod component 1. The drill rod components cooperate to achieve drilling, wherein the drill diameter of the drill rod component in the expanded state of the cutting member is larger than the drill diameter in the unexpanded state. Preferably, the drill rod component 1 has a power end 3 and a drilling end 4 opposite to the power end 3; as shown in FIG. The end 4 unfolds to the power end 3. Optionally, the cutting component 2 is hinged to the drill rod component 1. The power end 3 of the drill rod assembly may also be provided with a connection structure for connecting with an external device, such as a flange structure 5. As a further improvement method, the drill rod component 1 may further include: a drill rod body 6, a spiral blade 7, arranged on the drill rod body 6, and a drill bit 8 arranged on the drill rod body 6, And located at the drilling end 4; wherein, the cutting component 2 may be provided on one or more of the drill rod body 1, the spiral blade 7, and the drill bit 8. Fig. 4 only shows the embodiment of hingedly connecting the cutting component 2 to the spiral blade 7, and other embodiments are not shown in Fig. 4. Those skilled in the art can use the above description in combination with those in the art. Implement common knowledge. The drill bit 8 is provided with a soil borrowing device installation structure.

In order to realize the movable nesting, the structure of the protective cylinder 13 needs to be matched with the structure of the drill rod assembly 14, that is, as shown in FIG. 4, when the cutting part 2 of the drill rod assembly 14 is in a retracted or contracted state, the drill rod assembly The drill diameter of 14 is less than or equal to the inner diameter of the protective tube 13. As shown in FIG. 5, when the cutting component is in the unfolded state, the drill diameter of the drill rod assembly 14 is larger than the inner diameter of the protective tube 13, preferably It is larger than the outer diameter of the protective tube 13, so that the diameter of the drilled hole is larger than the outer diameter of the protective tube, so that when the protective tube 13 extends downward into the hole for wall protection movement, the hole wall 30 will not oppose The resistance of the protective tube 13 is reduced to a minimum, even the resistance is zero.

As a further improved embodiment, in the drill rod assembly of this embodiment, the drill rod component 1 has a movement restriction structure that restricts the movement of the cutting component in the unfolding direction. Specifically, the movement restriction structure may be any structure formed on the drill rod body, or spiral blade, or even the spiral blade itself (not shown here).

As another embodiment, as shown in FIG. 6, the cutting member of the drill rod assembly and the drill rod member may be connected by at least a spring member 9. For example, the cutting member 2 is hinged with the drill rod member 1. At the same time, they are connected together by a spring member 9. The direction of elastic deformation of the spring member 9 matches the direction of the recovery movement of the cutting member 2. As another embodiment, as shown in FIG. 7, the cutting member It is connected with the drill rod member by a spring member, which provides a restrictive elastic force for the deployment of the cutting member; in this way, when the cutting member 2 is in a protective cylinder for protecting the hole wall, It can help realize that the spring member 9 is in a compressed state when restricted by the inner wall of the protective cylinder, so that the cutting member 2 is in a recovered state or a contracted state; when the cutting member 2 is outside the protective cylinder, The spring member 9 is adapted to radially expand the cutting member 2 to an unfolded state.

As another embodiment, in the drill rod assembly of this embodiment, the cutting member 2 can be directly hinged to the outer edge of the spiral blade 7; this kind of hinge does not need to be connected with the spring member 9 and can only use The above-mentioned movement restriction structure cooperates with the gravity of the drill rod itself to keep the cutting component 2 in a fully expanded state.

As shown in FIG. 8, as one of the embodiments, the soil sampling device is detachably connected to the drill bit through a cylinder. The installation structure of the soil borrowing device is provided on the drill bit for the installation hole 110 into which the connecting post 109 on the cylinder of the soil borrowing device is inserted. The pin holes 112 on the connecting column 109 are plugged together to achieve installation.

As a further improved embodiment, in the drilling rig of this embodiment, the pulley rope installed on the pulley is connected to the drill rod assembly through the drill rod power component.

In order to be able to realize the injecting of the pile material, that is, concrete into the pile hole during the process of drilling and wall protection, the axial penetration structure of the drill rod component allows the pile material such as concrete to pass through.

As shown in FIG. 9, as a further improved implementation, the drilling rig of this embodiment may also include a concrete pouring device 10 installed on the frame, and the concrete pouring device 10 is connected to the drill rod assembly through a pouring pipe 31 The cavity of the drill rod component is communicated with each other, and is used for pouring concrete directly into the pile hole through the cavity of the drill rod after the drilling and wall protection work is completed.

As shown in Fig. 10, the construction method of continuous pile formation using the drilling rig of the above embodiment includes:

a. Place the protective barrel assembly 12 of the drilling rig at the position of the pile hole; b. sink the drill rod assembly 14 of the drilling rig and penetrate the protective barrel 13 for drilling, when the drill rod assembly 14 The cutting component extends downwards from the protective tube 13 and then is unfolded, and along with the rotation of the drill rod assembly 14 rotates and cuts the hole wall of the pile hole to achieve reaming; c. follow the drill rod assembly 14 and the cutting component 2 sink the protective tube 13 to protect the pile hole; d. When the protective tube sinks to a predetermined position and the drill rod assembly is drilled to the designed depth, The drill rod assembly 14 is raised to a predetermined height, and the cutting component 2 is contracted, and the protective tube 13 is retained in the pile hole; e. When the drill rod assembly is raised to a predetermined height, Inject concrete into the pile hole through the axial penetration structure of the drill rod component 1, and allow the drill rod assembly 14 to pass through the protective tube 13 and rise above the pile hole; f Install the soil borrowing device 120 on the drill rod assembly 14, and then enter the protective barrel 13 again to sink the drill rod assembly 14 and the soil borrowing device 120, by rotating the drill rod assembly 14 and the The soil taking device 120 is used to take the soil or slurry on the top of the concrete into the soil taking device 120; g. Lift the drill rod assembly 14 and the soil taking device 120 through the protective tube 13 to the top of the pile hole; h. Lift the protective tube assembly out of the pile hole.

Wherein, the cutting component can be deployed manually after extending downward from the protective tube 13, or it can be automatically bounced off according to the spring connection structure of the cutting component and the drill rod component; the cutting component can be pierced upwards into the protective tube 13 before being deployed. Through artificial contraction, the spring connection structure of the cutting component and the drill rod component can also be restricted by the inner cavity of the protective cylinder, and the cutting component is compressed and contracted when the drill rod assembly is lifted.

Before injecting concrete into the pile hole, the predetermined height that the drill rod assembly can be raised may be 5-10 cm. In the process of injecting concrete, the concrete will affect the drill rod assembly. An upward thrust is applied to push the drill rod assembly upwards; it is also possible to inject concrete while lifting the drill rod assembly, and the speed of the upward and downward pressure is matched to make the concrete fully filled with the concrete Pile hole, so as to obtain a dense pile.

As another improved embodiment, in the above step e, before the concrete injection, the method further includes: drilling the drill rod assembly to the designed depth again, and lifting the drill rod assembly to a predetermined height.

Obviously, the foregoing embodiments are merely examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, other changes or modifications in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the protection scope created by the present invention.

Claims

A construction method for continuous pile formation, which is characterized in that it comprises:

a. Place the protective barrel assembly of the drilling rig at the position of the pile hole; wherein the drilling rig includes: a frame; a protective barrel assembly, installed on the frame, including a protective barrel for protecting the hole wall; a drill rod assembly , Installed on the frame, including at least one drill rod component with an axial through structure, and at least partly movably embedded in the protective tube assembly; the drill rod power component is connected with the drill rod assembly, The rotation of the drill rod assembly provides power; a driving mechanism is installed on the frame, connected with the drill rod assembly and the protective barrel assembly, and is used to realize the up and down of the protective barrel assembly and the drill rod assembly, respectively Mutual nesting movement; cutting components, radially expandable and movably connected to the drill rod assembly, adapted to cooperate with the drill rod assembly to achieve drilling, wherein the drill diameter of the drill rod assembly is in the cutting The drill diameter in the expanded state of the component is larger than the drill diameter in the contracted state, and larger than the inner diameter of the protective cylinder, and the drill diameter of the cutting member in the contracted state is smaller than the inner diameter of the protective cylinder; soil sampling device, wherein the soil sampling device The device is detachably connected to the drill rod assembly, is suitable for rotating with the drill rod assembly, and is suitable for axially entering the inner cavity of the protective cylinder with the drill rod assembly;

b. Sinking the drill rod assembly of the drill rig to drill down through the protective tube, when the cutting part on the drill rod assembly extends downwards from the protective tube and then is deployed, and follow the drill rod Rotation of the component rotates and cuts the hole wall of the pile hole to realize hole reaming;

c. Follow the drill rod assembly and the cutting component to sink the protective tube to realize the wall protection of the pile hole;

d. After the protective tube sinks to a predetermined position and the drill rod assembly is drilled to the designed depth, the drill rod assembly is raised to a predetermined height, and the cutting component is contracted, and the protective tube is retained In the pile hole;

e. Pressure-inject concrete into the pile hole through the axial through structure of the drill rod component, and allow the drill rod assembly to rise above the pile hole through the protective tube;

f. Install the soil borrowing device on the drill rod assembly, and enter the protective cylinder again to sink the drill rod assembly and the soil borrowing device, by rotating the drill rod assembly and the soil borrowing device , Taking the soil or slurry on the top of the concrete into the soil borrowing device;

g. Raise the drill rod assembly and the soil borrowing device through the protective tube to above the pile hole;

h. Lift the protective tube assembly out of the pile hole.
The construction method for continuous pile formation according to claim 1, wherein the drill rod assembly has a power end, and a drilling end opposite to the power end; the direction in which the cutting member expands radially is determined by The drilling end is deployed toward the power end.
The construction method for continuous pile formation according to claim 2, wherein the soil borrowing device comprises: a cylinder with a bearing plate at the bottom; wherein the bearing plate is provided with a working rotation toward the cylinder The soil inlet; the soil inlet is provided with a loose-leaf connection with the bearing plate, and is suitable for a sealing member that is loosely expanded toward the inner side of the cylinder in the opposite direction of the working rotation direction, and the sealing member is suitable In performing loose-leaf sealing on the soil inlet, wherein the angle of the loose-leaf unfolding of the sealing member toward the inner side of the cylinder is less than 90 degrees.
The construction method for continuous pile formation according to claim 3, wherein the drill rod assembly comprises: a drill rod main body, a spiral blade, arranged on the drill rod main body, and a drill bit arranged on the drill On the main body of the rod and located at the drilling end; wherein the cutting component is provided on one or more of the main body of the drill rod, the spiral blade, and the drill bit; the soil borrowing device passes through a barrel The body is detachably connected with the drill bit.
The construction method for continuous pile formation according to claim 4, wherein the drill rod member has a movement restriction structure that restricts the movement of the cutting member in the unfolding direction.
The construction method for continuous pile formation according to claim 5, characterized in that:

The cutting member and the drill rod member are connected at least by a spring member, and are hinged on the outer edge of the spiral blade.
The construction method for continuous pile formation according to claim 6, characterized in that:

The soil inlet is formed by at least the edges of the first bearing board portion and the second bearing board portion of the bearing board, wherein the first bearing board portion is lower than the first bearing board portion in the axial direction of the cylinder. Two load-bearing boards are partially arranged.
The construction method for continuous pile formation according to any one of claims 3-7, characterized in that: in step e, before injecting the concrete, it further comprises: drilling the drill rod assembly to the design depth again, and Lift the drill rod assembly to a predetermined height.
The construction method for continuous pile formation according to claim 8, characterized in that: the cylinder body includes at least two cylinder petals and a top cover part connected with the cylinder valve flap, wherein the cylinder valve and the The top cover part is hinged to form the structure of the cylinder.
The construction method for continuous pile formation according to claim 9, characterized in that it further comprises a step of inserting a steel cage into the concrete after the step g.