WO2017008468A1

WO2017008468A1 - Drill rod distribution structure for cement mixing pile driver

Info

Publication number: WO2017008468A1
Application number: PCT/CN2016/000391
Authority: WO
Inventors: 周兆弟
Original assignee: 周兆弟
Priority date: 2015-07-15
Filing date: 2016-07-14
Publication date: 2017-01-19
Also published as: CN105002896A; CN105002896B

Abstract

A drill rod distribution structure for a cement mixing pile driver, comprising a drill rod assembly (1), the drill rod assembly (1) having at least three drill rods (11) arranged vertically and able to rotate circumferentially, a plurality of mixing bodies (12) being arranged on each drill rod (11), the projection in the vertical direction of the centre lines of the drill rods (11) of the drill rod assembly (1) not being on the same straight line, the centre lines of any three drill rods (11) in the drill rod assembly (1) having a centre line projection in the vertical direction not being on the same straight line successively connecting together to form a triangular structure, and the drill rods (11) being offset against each other in the vertical direction.

Description

Drill pipe distribution structure of cement soil mixing pile driver

Technical field

The invention belongs to the technical field of construction equipment, and in particular relates to a distribution structure of a drill pipe of a cement-soil mixing pile driver.

Background technique

Cement-soil mixing pile is a method for reinforcing the low foundation of saturated soft clay. It uses cement as a curing agent, and uses a special mixing machine to forcibly stir the soft soil and the curing agent deep in the foundation, using the curing agent and soft soil. A series of physical and chemical reactions between the soft soils are hardened into a high-quality foundation with integrity, water stability and a certain strength. The common pile driver of cement-soil mixing pile is mostly two-axis mixing pile, which is made up of two equal-diameter cylinders. For the two-axis cement-soil mixing pile machine, in order to improve the water stopping effect, it is necessary to construct outside the foundation pit. Two rows of cement-soil mixing piles, after the first row of piles are completed, the pile driver is required to be moved, and the second row of cement-soil mixing piles is constructed at the position of the second row of piles, which makes the construction speed slow, takes a long time, and two rows There is a lap joint between the piles, and the drill pipe is drilled and lifted many times, and the stirring is insufficient.

In order to solve the problems existing in the prior art, people have conducted long-term exploration and proposed various solutions. For example, the Chinese patent document discloses a six-axis cement-soil mixing pile machine [application No.: 201310343118.X], and the present invention provides a six-axis cement-soil mixing pile machine, the power box is connected with six drill pipes, and the six drill pipes are provided. Multiple blades or blades, six drill pipes can directly spray six cement soil mixing piles at one time. Compared with traditional mixing piles, the number of drill pipes is large, and there are more blades or blade drills on each drill pipe. The rod can be sprayed directly. The above solution solves the problem of low construction efficiency of the existing cement-soil mixing pile machine to a certain extent, but the solution still exists: the mixing is not uniform, the pull-out ability of the cement-soil mixing pile is poor, the drilling is difficult, and the stability is poor. .

Summary of the invention

The object of the present invention is to provide a drill rod distribution structure of a cement-soil mixing pile pile driver with simple and reasonable structure and uniform stirring.

In order to achieve the above object, the present invention adopts the following technical solution: the drill pipe distribution structure of the cement-soil mixing pile driver, including a drill pipe assembly having at least three drill rod bodies capable of circumferentially rotating in a vertical direction, each drill The rod body is provided with a plurality of agitating bodies, wherein the projection of the center line of the drill rod body in the vertical direction of the drill rod assembly is not on the same straight line, and any three center lines in the drill rod assembly are vertical The center lines of the drill rod bodies which are not in the same straight line are connected in sequence to form a triangular structure, and the drill rod bodies are arranged one by one in the vertical direction. Obviously, the drill rod bodies in each drill rod assembly are not located on the same straight line, which increases the circumference of the cross section of the cement-soil mixing pile after construction, improves the pull-out resistance of the cement-soil mixing pile, and each drill rod body The misalignment in the vertical direction can improve the uniformity during mixing and reduce the difficulty of drilling during construction.

In the above-mentioned drill pipe distribution structure of the cement-soil mixing pile driver, the drill pipe assembly includes at least one main drill pipe, and the main drill pipe is provided with at least two auxiliary drill pipes on the circumferential outer side, and The projection of the centerline of the main drill pipe in the vertical direction is not in line with the projection of the centerline of the secondary drill pipe in the vertical direction. Preferably, the main drill pipe is arranged at the center, each auxiliary drill pipe is arranged on the outer side of the main drill pipe, and the main drill pipe and the auxiliary drill pipe are arranged in a vertical direction, thereby increasing the cross section of the drill hole during construction. Area, enhance the pullout resistance of cement-soil mixing piles.

In the above-mentioned drill pipe distribution structure of the cement-soil mixing pile driver, the main drill pipe and the auxiliary drill pipe are arranged in a rectangular column. Preferably, the number of the main drill rods is one, and the number of the auxiliary drill rods is eight, and since the main drill rods and the auxiliary drill rods are arranged in a rectangular column, the drill holes of approximately rectangular shape can be drilled in one step. This increases the cross-sectional area of the cement-soil mixing pile.

In the above-mentioned drill pipe distribution structure of the cement-soil mixing pile driver, the auxiliary drill pipe includes a plurality of first auxiliary drill pipe body and second secondary drill pipe body disposed circumferentially outside the main drill pipe, the first The auxiliary drill rod body and the second auxiliary drill rod body are staggered one by one, and the first auxiliary drill rod body and the second auxiliary drill rod body are circumferentially distributed around the main drill rod and form annular structures with different diameters. That is to say, a main drill pipe is arranged in the middle, and the number of the first auxiliary drill pipe body and the second auxiliary drill pipe body are four and respectively distributed circumferentially to form rings having different diameters, so that a single square can be drilled during construction. Drilling eliminates the need to move the pile driver and repeat drilling, saving costs.

In the above-mentioned drill pipe distribution structure of the cement-soil mixing pile driver, the first auxiliary drill body and the second auxiliary drill body are uniformly distributed circumferentially. Each of the first auxiliary drill rod body and the second auxiliary drill rod body are evenly distributed and have good stability.

In the above-mentioned drill pipe distribution structure of the cement-soil mixing pile driver, the main drill pipe and the auxiliary drill pipe are circumferentially rotated on the driving casing, and the main drill pipe and the driving casing are arranged There is an axial drive mechanism that can drive the main drill rod to reciprocate axially. Preferably, the driving box body is provided with a drill rod driver, and the drill rod driver drives the main drill rod to rotate circumferentially through the driving gear, and the main drill rod is connected to a part of the auxiliary drill rod through the first transmission gear, so that the auxiliary drill rods The reverse rotation can be synchronously synchronized with the main drill rod, and the remaining auxiliary drill rod is connected to the second transmission gear and the main drill rod through the bridge gear, so that the remaining auxiliary drill rod can rotate in the forward direction synchronously with the main drill rod. This makes the agitation more uniform, and reduces the reaction force of the drill hole, and when encountering a relatively hard soil layer or rock during drilling, the main drill rod is axially stretched by the axial drive mechanism, making the drilling easier. It improves the efficiency of drilling and is not easy to encounter the phenomenon of being unable to drill.

In the above-mentioned drill pipe distribution structure of the cement-soil mixing pile driver, the main drill rod has one end running through the driving box and the other end extending downward, and the auxiliary drill rod is rotated at one end and disposed in the driving box body. The other end extends downward in the same direction as the main drill rod. That is, the main drill rod and the auxiliary drill rod are disposed in the same direction, and the ends of the two drill rods are all disposed on the driving box body.

In the above-mentioned drill pipe distribution structure of the cement-soil mixing pile driver, the axial driving mechanism includes a through hole disposed in the driving box, the main drilling rod penetrates through the through hole and the main drilling rod and the through hole An axial guiding assembly is arranged between the holes for axially sliding the main drill rod and the through hole, and the end of the main drilling rod is connected with an axial driving assembly capable of driving the main drilling rod to reciprocally slide back and forth along the through hole. . That is, the axial expansion of the main drill rod by the axial drive assembly realizes the expansion and contraction of the main drill rod.

In the drill pipe distribution structure of the cement-soil mixing pile driver, the axial guiding assembly includes a spline sleeve disposed in the through hole and having a plurality of axially extending guiding grooves on the inner side in the circumferential direction, the main A plurality of axially extending guiding ribs are arranged on the outer side of the drill rod, and the guiding ribs are slidably engaged with the guiding groove, and a bearing is arranged between the spline sleeve and the through hole. Since the bearing is arranged between the spline sleeve and the through hole, the main drill rod can be rotated circumferentially and axially, and the two do not interfere with each other.

In the drill pipe distribution structure of the cement-soil mixing pile driver, the axial drive assembly includes a support frame disposed on the drive housing, the support frame is provided with a lifting drive, and the The output shaft of the lift drive is connected to the main drill rod in a circumferential direction. Preferably, the output shaft of the lifting drive is connected to the main drill rod through the bearing housing, so that the lifting drive does not rotate with the main drill rod when the main drill rod rotates in the circumferential direction, and is driven by the lifting drive. The drill rod slides axially within the spline sleeve for telescoping.

Compared with the prior art, the advantage of the drill pipe distribution structure of the cement-soil mixing pile driver is that the mixing is uniform, the obtained cement-soil mixing pile has strong pullout resistance, the drilling difficulty is small, and the single drilling can be approximated. Rectangular drilling, no need to re-enter The transfer machine and repeated drilling save the construction cost and the stability is good.

DRAWINGS

1 is a schematic structural view of a drill rod assembly according to an embodiment of the present invention.

2 is a schematic structural view of another perspective view of a drill pipe assembly according to an embodiment of the present invention.

Fig. 3 is a structural schematic view showing the use of a drill rod body in the embodiment of the present invention.

Fig. 4 is a partial structural view showing the state in which the drill rod body is used in the embodiment of the present invention.

Fig. 5 is a structural schematic view showing the connection state of a drill pipe driver according to an embodiment of the present invention.

Figure 6 is a schematic view showing the structure of a second drill pipe assembly according to an embodiment of the present invention.

Figure 7 is a schematic view showing the structure of a three-drill pipe assembly of an embodiment of the present invention.

In the figure, the drill pipe assembly 1, the drill pipe body 11, the agitating body 12, the main drill pipe 13, the auxiliary drill pipe 14, the first auxiliary drill pipe body 141, the second secondary drill pipe body 142, the drive casing 2, the axial drive mechanism 3 The through hole 31, the spline sleeve 32, the guiding groove 321, the guiding rib 33, the bearing 34, the supporting frame body 35, the lifting drive 36, the drill pipe driver 4, the driving gear 41, the first transmission gear 42, and the second transmission gear 43. Bridge gear 44 and bearing housing 45.

detailed description

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

Embodiment 1

As shown in FIG. 1-2, the drill pipe distribution structure of the cement-soil mixing pile driver includes a drill pipe assembly 1 having at least three drill rod bodies 11 disposed in a vertical direction in a circumferential direction, each of the drill rod bodies 11 A plurality of agitating bodies 12 are provided, and the projections of the center line of the drill rod body 11 in the drill pipe assembly 1 in the vertical direction are not on the same straight line, and the projection of any three center lines in the drill pipe assembly 1 in the vertical direction is not The center lines of the drill rod bodies 11 on the same straight line are sequentially connected to form a triangular structure, and the drill rod bodies 11 are arranged one by one in the vertical direction. Obviously, the drill rod bodies 11 in each of the drill rod assemblies 1 are not on the same straight line. This increases the circumference of the cross section of the cement-soil mixing pile after construction, improves the pull-out resistance of the cement-soil mixing pile, and the displacement of each drill rod body 11 in the vertical direction can improve the uniformity during mixing. The other direction also reduces the difficulty of drilling during construction.

Specifically, the drill pipe assembly 1 in this embodiment includes at least one main drill pipe 13 , and the main drill pipe 13 is provided with at least two auxiliary drill pipes 14 on the circumferential outer side, and the center line of the main drill pipe 13 is in the vertical direction. The projection of the center line of the secondary drill pipe 14 in the vertical direction is not in the same line. Preferably, the main drill pipe 13 is disposed at the center, and each of the secondary drill pipes 14 is disposed circumferentially outside the main drill pipe 13 Moreover, the main drill pipe 13 and the auxiliary drill pipe 14 are arranged in a vertical direction, which increases the cross-sectional area of the drill hole during construction and enhances the pull-out resistance of the cement-soil mixing pile. Wherein, the auxiliary drill pipe 14 includes a plurality of first secondary drill pipe bodies 141 and second secondary drill pipe bodies 142 disposed on the outer side of the main drill pipe 13 , and the first secondary drill pipe body 141 and the second secondary drill pipe body 142 are interlaced one by one. The first auxiliary drill pipe body 141 and the second secondary drill pipe body 142 are uniformly distributed circumferentially around the main drill pipe 13 and form an annular structure with different diameters, that is, a main drill pipe 13 is disposed in the middle, and the first auxiliary drill The number of the rod body 141 and the second auxiliary drill rod body 142 are four and are respectively circumferentially distributed to form a ring shape with different diameters, so that a nearly square hole can be drilled in a single time during construction, and the pile driver is not required to be re-drilled. The holes save cost, and the first auxiliary drill pipe body 141 and the second secondary drill pipe body 142 are uniformly distributed and have good stability.

As shown in FIG. 3-5, the main drill rod 13 and the auxiliary drill rod 14 in the embodiment are circumferentially rotatably disposed on the driving box 2, and the main drilling rod 13 and the driving box 2 are provided with a main driving unit. An axial drive mechanism 3 in which the drill pipe 13 reciprocates axially, Preferably, the drive box 2 is provided with a drill rod driver 4, and the drill rod driver 4 drives the main drill rod 13 to rotate circumferentially through the drive gear 41. The main drill rod 13 passes through the first transmission gear 42 and a portion of the auxiliary drill rod 14. Connected so that the secondary drill pipe 14 can rotate in reverse with the main drill pipe 13, and the remaining secondary drill pipe 14 is connected to the second transmission gear 43 and the main drill pipe 13 via the bridge gear 44, thus making the remaining The auxiliary drill pipe 14 can rotate in the forward direction synchronously with the main drill pipe 13, so that the agitation is more uniform, and the drilling force is reduced, and the reaction force is generated, and the main drill pipe 13 is encountered when a relatively hard soil layer or rock is encountered during drilling. The axial drive mechanism 3 can axially expand and contract, which makes the drilling easier, improves the efficiency of the drilling, and is not easy to encounter the phenomenon of being unable to drill. Here, the main drill rod 13 has one end running through the driving box 2, and the other end extending downward. The auxiliary rod 14 is rotatably disposed in the driving box 2 at one end, and the other end extends downward in the same direction as the main rod 13, that is, the main Both the drill pipe 13 and the auxiliary drill pipe 14 are disposed in the same direction, and the ends of the two drill pipes are disposed on the drive casing 2.

The axial driving mechanism 3 in this embodiment includes a through hole 31 disposed in the driving box 2, and the main drill rod 13 penetrates through the through hole 31 and is disposed between the main drill rod 13 and the through hole 31. An axial guiding assembly of the main drill rod 13 and the through hole 31 axially slidingly connected, the end portion of the main drill rod 13 is connected with an axial driving assembly capable of driving the main drill rod 13 to reciprocally slide along the through hole 31 in the axial direction, when drilling When a relatively hard soil layer or rock is encountered, the main drill pipe 13 is axially slid by the axial drive assembly to realize the expansion and contraction of the main drill pipe 13.

Preferably, the axial guiding assembly herein comprises a spline sleeve 32 disposed in the through hole 31 and having a plurality of axially extending guiding grooves 321 on the circumferential inner side, and the main drill rod 13 is provided with a plurality of axially extending guides on the circumferential outer side. The rib 33 is disposed, and the guiding rib 33 is slidably engaged with the guiding groove 321 . The bearing 34 is disposed between the spline sleeve 32 and the through hole 31. Since the bearing 34 is disposed between the spline sleeve 32 and the through hole 31, the main drill is formed. The rod 13 can be rotated in the circumferential direction and axially, and the two do not interfere with each other.

Wherein, the axial drive assembly includes a support frame 35 disposed on the drive housing 2, the support frame 35 is provided with a lift drive 36, and the output shaft of the lift drive 36 is circumferentially rotatably connected to the main drill rod 13 Preferably, the output shaft of the lift drive 36 is connected to the main drill rod 13 through the bearing housing 45, such that the lift drive 36 does not rotate with the main drill rod 13 when the main drill rod 13 is rotated circumferentially, and The main drill rod 13 is driven to slide axially within the spline sleeve 32 under the drive of the lift drive 36 for telescoping.

The principle of this embodiment is that one main drill pipe 13 is disposed in the middle portion, eight auxiliary drill pipes 14 are disposed on the circumferential outer side thereof, and the main drill pipe 13 and each auxiliary drill pipe 14 are dislocated in the vertical direction, so that To make the mixing more uniform, the auxiliary drill pipe 14 includes four first secondary drill pipe bodies 141 and four first secondary drill pipe bodies 142, and the two secondary drill pipes 14 are circumferentially distributed to form rings having different diameters, so that the construction time is single. The drill can be drilled approximately square, and the drill can be re-drilled without moving the pile driver, which saves the cost. The drill rod driver 4 drives the main drill rod 13 to rotate circumferentially through the drive gear 41, and the main drill rod 13 passes the first transmission. The gear 42 is coupled to a portion of the secondary drill pipe 14 such that the secondary drill pipe 14 can be rotated in synchronism with the main drill pipe 13 and the remaining secondary drill pipe 14 passes through the bridge gear 44 and the second transmission gear 43 and the main drill pipe 13 connected, so that the remaining auxiliary drill pipe 14 can rotate in the forward direction synchronously with the main drill pipe 13, so that the agitation is more uniform, and the drilling is reduced to cause a reaction force, and a relatively hard soil layer is encountered during drilling or In the case of stones, the main drill pipe 13 is carried by the axial drive mechanism 3 Axially stretching, makes drilling easier, improves the efficiency of drilling, the drill is not easy to encounter difficulty moving phenomenon.

Embodiment 2

As shown in FIG. 6 , the structure, the principle, and the implementation steps of the embodiment are similar to those of the first embodiment. The difference between the main drill pipe 13 and the auxiliary drill pipe 14 in the present embodiment is a rectangular column arrangement, preferably Here, the number of the main drill rods 13 is one, and the number of the auxiliary drill rods 14 is eight, and since the main drill rods 13 and the auxiliary drill rods 14 are arranged in a rectangular whole column, an approximately rectangular drill can be drilled in one step. The hole, which increases the cross-sectional area of the cement-soil mixing pile.

Embodiment 3

As shown in FIG. 7 , the structure, the principle and the implementation steps of the embodiment are similar to those of the first embodiment. The difference is that the auxiliary drill pipe 14 in the embodiment is annular and evenly distributed with the main drill pipe 13 as a center. For example, the number of the auxiliary drill pipes 14 is four, and the number of the main drill pipes 13 is one and is disposed at the center of the auxiliary drill pipe 14, so that an approximately rectangular drill hole can be drilled in one step, thus increasing The cross-sectional area of the cement-soil mixing pile.

The specific embodiments described herein are merely illustrative of the spirit of the invention. A person skilled in the art can make various modifications or additions to the specific embodiments described or in a similar manner, without departing from the spirit of the invention or as defined by the appended claims. The scope.

Although the drill pipe assembly 1, the drill rod body 11, the agitating body 12, the main drill pipe 13, the auxiliary drill pipe 14, the first auxiliary drill pipe body 141, the second secondary drill pipe body 142, the drive housing 2, and the shaft are used more frequently herein. The driving mechanism 3, the through hole 31, the spline sleeve 32, the guiding groove 321, the guiding rib 33, the bearing 34, the supporting frame body 35, the lifting drive 36, the drill pipe driver 4, the driving gear 41, the first transmission gear 42, The terms second transmission gear 43, bridge gear 44, bearing housing 45, etc., do not preclude the possibility of using other terms. These terms are only used to describe and explain the nature of the invention more conveniently; it is to be construed that any additional limitation is inconsistent with the spirit of the invention.

Claims

A drill pipe distribution structure of a cement-soil mixing pile driver, comprising a drill pipe assembly (1) having at least three drill rod bodies (11) vertically arranged in a circumferential direction, each of the drill rod bodies (11) A plurality of agitating bodies (12) are provided, characterized in that the projections of the center line of the drill rod body (11) in the drill rod assembly (1) in the vertical direction are not in the same straight line, and the drill rod assembly (1) The center line of the drill rod body (11) in which the projection of any three center lines in the vertical direction is not on the same straight line is sequentially connected to form a triangular structure, and the drill rod body (11) is dislocated in the vertical direction one by one. .
A drill pipe distribution structure for a cement-soil mixing pile driver according to claim 1, wherein said drill pipe assembly (1) comprises at least one main drill pipe (13), said main drill pipe ( 13) at least two secondary drill rods (14) are provided on the outer side of the circumference, and the projection of the center line of the main drill rod (13) in the vertical direction and the center line of the auxiliary drill rod (14) are in the vertical direction The projections are not on the same line.
The drill pipe distribution structure of the cement-soil mixing pile driver according to claim 2, wherein the main drill pipe (13) and the auxiliary drill pipe (14) are arranged in a rectangular column.
The drill pipe distribution structure of the cement-soil mixing pile driver according to claim 2, wherein the auxiliary drill pipe (14) comprises a plurality of first auxiliary drills disposed on a circumferential outer side of the main drill pipe (13). The rod body (141) and the second sub-drill rod body (142), the first auxiliary drill rod body (141) and the second auxiliary drill rod body (142) are staggered one by one and the first auxiliary drill rod body (141) The second auxiliary drill rod body (142) is circumferentially distributed around the main drill rod (13) and forms an annular structure with different diameters.
The drill pipe distribution structure of the cement-soil mixing pile driver according to claim 4, wherein the first auxiliary drill body (141) and the second auxiliary drill body (142) are evenly distributed circumferentially.
The drill pipe distribution structure of the cement-soil mixing pile driver according to claim 2 or 3 or 4 or 5, wherein the main drill rod (13) and the auxiliary drill rod (14) are circumferentially rotated. On the driving box (2), the main drilling rod (13) and the driving box (2) are provided with an axial driving mechanism (3) capable of driving the main drill rod (13) to reciprocate axially.
The drill pipe distribution structure of the cement-soil mixing pile driver according to claim 6, wherein the main drill rod (13) has one end running through the driving box body (2) and the other end extending downwardly. The auxiliary drill pipe (14) is rotatably disposed at one end in the drive casing (2), and the other end extends downward in the same direction as the main drill pipe (13).
The drill pipe distribution structure of the cement-soil mixing pile driver according to claim 6, wherein the axial driving mechanism (3) comprises a through hole (31) disposed in the driving box (2), The main drill rod (13) penetrates into the through hole (31) and is disposed between the main drill rod (13) and the through hole (31) to enable the main drill rod (13) and the through hole (31) to be axially The axially connected assembly is slidably connected, and the end of the main drill rod (13) is connected with an axial drive assembly capable of driving the main drill rod (13) to reciprocally slide axially along the through hole (31).
The drill pipe distribution structure of a cement-soil mixing pile driver according to claim 6, wherein the axial guiding assembly comprises a guide disposed in the through hole (31) and having a plurality of axially extending guides on the inner side in the circumferential direction. a spline sleeve (32) of the groove (321), the main drill rod (13) is provided with a plurality of axially extending guiding ribs (33) on the circumferential outer side, and the guiding ribs (33) and the guiding The groove (321) is slidably fitted, and a bearing (34) is disposed between the spline sleeve (32) and the through hole (31).
The drill pipe distribution structure of a cement-soil mixing pile driver according to claim 6, wherein the axial drive assembly comprises a support frame (35) disposed on the drive casing (2), The support frame body (35) is provided with a lifting drive (36), and the output shaft of the lifting drive (36) is circumferentially rotatably connected to the main drill rod (13).