阅读说明：本技术 一种基岩桩基纠偏方法 (Deviation rectifying method for bedrock pile foundation ) 是由 汪俊虎 白淑娟 徐元金 高原 罗龙凤 李昌刚 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种基岩桩基纠偏方法,所述方法包括：S01、在基岩上钻出初始桩孔；S02、在钻杆上转动连接支撑机构,将支撑机构设置在初始桩孔内,且支撑机构侧部接触桩孔内壁,支撑机构中轴线与初始桩孔中轴线重合,在初始桩孔的基础上继续钻孔。以解决现有技术在不增加成本,不拖慢工程进度的情况下,不能保证保证桩孔不倾斜的问题。(The invention discloses a deviation rectifying method for a bedrock pile foundation, which comprises the following steps: s01, drilling an initial pile hole on the bedrock; and S02, rotating the drill rod to connect with the supporting mechanism, arranging the supporting mechanism in the initial pile hole, enabling the side part of the supporting mechanism to contact the inner wall of the pile hole, enabling the central axis of the supporting mechanism to coincide with the central axis of the initial pile hole, and continuously drilling on the basis of the initial pile hole. The problem that in the prior art, the pile hole cannot be guaranteed not to incline under the conditions that cost is not increased and the engineering progress is not slowed down is solved.)

1. A deviation rectifying method for bedrock pile foundations is characterized by comprising the following steps:

s01, drilling an initial pile hole on the bedrock (1);

s02, the support mechanism (4) is rotatably connected to the drill rod (3), the support mechanism (4) is arranged in the initial pile hole, the side portion of the support mechanism (4) contacts the inner wall of the pile hole (1-1), the central axis of the support mechanism (4) is overlapped with the central axis of the initial pile hole, and drilling is continued on the basis of the initial pile hole.

2. The method for correcting a bedrock pile foundation according to claim 1, further comprising: the distance between the supporting mechanism (4) and the drill bit (2) is kept to be larger than 1/2 from the drill bit (2) to the length of the opening of the drill hole in the drilling process.

3. A method for deviation rectification of a bedrock pile foundation according to claim 1, characterised in that the support mechanism (4) comprises:

the drill pipe drilling machine is characterized by comprising a connecting bearing (4-1), wherein the inner ring of the connecting bearing (4-1) is non-cylindrical, a drill pipe (3) is matched with the inner ring of the connecting bearing (4-1), the inner ring of the connecting bearing (4-1) is sleeved on the drill pipe (3), and the central axis of the connecting bearing (4-1) is superposed with the central axis of the drill pipe (3);

the support rod (4-2), the bracing piece (4-2) include more than 3, 3 bracing pieces (4-2) around connecting bearing (4-1) a week evenly distributed on the outer loop of connecting bearing (4-1), bracing piece (4-2) are perpendicular with the axis of connecting bearing (4-1).

4. The method for correcting a bedrock pile foundation according to claim 3, further comprising:

the support rod (4-2) is an electric hydraulic pump, and the support rod (4-2) is electrically connected with the controller (8).

5. The method for correcting a bedrock pile foundation according to claim 4, further comprising:

the pressure sensor (4-3), the pressure sensor (4-3) is arranged between the support rod (4-2) and the connecting bearing (4-1), and the pressure sensor (4-3) is electrically connected with the controller (8).

6. The method for correcting a bedrock pile foundation according to claim 4, further comprising:

the wire winding device (5) at least comprises 2 wire winding devices (5), wherein the 2 wire winding devices (5) are symmetrically connected to the ground on the two sides of the drill rod (3) through support rods (4-2), the lower ends of wires (5-1) of the 2 wire winding devices (5) are symmetrically and fixedly connected with the upper surface of an outer ring of a connecting bearing (4-1), and the wire winding devices (5) are electrically connected with a controller (8).

7. The method for correcting a bedrock pile foundation according to claim 6, further comprising:

the inner ring of the stabilizing bearing (7) is matched with the drill rod (3), the inner ring of the stabilizing bearing (7) is sleeved on the drill rod (3), and the outer ring of the stabilizing bearing (7) is fixedly connected with the wire winding device (5).

Technical Field

The invention relates to a deviation rectifying method for a bedrock pile foundation, and belongs to the technical field of bedrock pile foundations.

Background

The bedrock pile foundation needs to be drilled with pile holes on bedrock. The existing pile hole is mainly drilled on the bedrock by a drilling machine and a drill rod is driven by the drilling machine.

The problem of inclination of the pile hole often exists when the pile hole is driven by a drilling machine, particularly when the pile hole is deep, and in order to solve the problem of inclination of the pile hole driven by the drilling machine, the method adopted by a person skilled in the art is as follows: once the pile hole is found to be inclined, the drill bit and the drill rod are immediately taken out and repositioned, and the pile hole is continuously drilled on the basis of the original pile hole after the directions of the drill bit and the drill rod are corrected so as to ensure that the pile hole is vertical.

However, the re-extraction of the drill bit and the drill rod has problems in that the extraction process and the re-positioning process are time-consuming and labor-consuming, the inclined portion cannot be used, the progress of the work is slowed, and the cost is increased. The technical problem is caused by the characteristic that the tiny inclination can cause the huge inclination of the pile hole after the drill rod is too long, and the existing method is insurmountable at present.

The existing pile hole drilling technology has the defects of the technical idea, so that the pile hole is ensured not to incline under the conditions of not increasing the cost and not slowing down the engineering progress, which cannot be realized.

The existence of the technical problem hinders the further development of the prior art. Meanwhile, the problem is caused by the defects of the technical idea of the prior art, and the prior art cannot solve the technical problem with technical contradiction, so that the requirement for ensuring that the pile hole is not inclined under the conditions of not increasing the cost and not slowing down the engineering progress is a technical problem which is always desired to be solved but is always unsuccessful in the technical field.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a deviation rectifying method for bedrock pile foundations, which overcomes the defects of the prior art.

The technical scheme of the invention is as follows: a deviation rectifying method for bedrock pile foundations comprises the following steps:

s01, drilling an initial pile hole on the bedrock;

and S02, rotating the drill rod to connect with the supporting mechanism, arranging the supporting mechanism in the initial pile hole, enabling the side part of the supporting mechanism to contact the inner wall of the pile hole, enabling the central axis of the supporting mechanism to coincide with the central axis of the initial pile hole, and continuously drilling on the basis of the initial pile hole.

Further, the method further comprises: the support mechanism is maintained at a distance from the drill bit during drilling greater than 1/2 the length of the drill bit to the drill opening.

Further, the support mechanism includes:

the inner ring of the connecting bearing is non-cylindrical, the drill rod is matched with the inner ring of the connecting bearing, the inner ring of the connecting bearing is sleeved on the drill rod, and the central axis of the connecting bearing is superposed with the central axis of the drill rod;

the bracing piece, the bracing piece includes more than 3, and 3 bracing pieces are around connecting bearing a week evenly distributed on the outer loop of connecting the bearing, and the bracing piece is perpendicular with the axis of connecting the bearing.

Further, still include:

the support rod is an electric hydraulic pump and is electrically connected with the controller.

Further, still include:

and the pressure sensor is arranged between the support rod and the connecting bearing and is electrically connected with the controller.

Further, still include:

the spooler, the spooler includes 2 at least, and 2 spoolers pass through bracing piece symmetric connection at the subaerial of drilling rod both sides, and the outer loop upper surface of the line lower extreme symmetry fixed connection bearing of 2 spoolers, the spooler is connected with the controller electricity.

Further, still include:

the inner ring of the stabilizing bearing is matched with the drill rod, the inner ring of the stabilizing bearing is sleeved on the drill rod, and the outer ring of the stabilizing bearing is fixedly connected with the wire winding device.

The invention has the beneficial effects that:

1) according to the invention, an initial pile hole is drilled on a bedrock, and then the drill rod is limited by the drill bit and the supporting mechanism simultaneously by using the supporting mechanism, so that the drill rod is kept vertical and not inclined all the time in the drilling process, and the pile hole is ensured to be vertical in the drilling process, which belongs to advance prevention, the drill bit and the drill rod are not required to be taken out again, the engineering progress is not dragged slowly, the pile hole is ensured not to be inclined under the conditions of not increasing the cost and not dragging the engineering progress, and the technical problem which is long desired to be solved in the technical field is solved;

2) the distance between the supporting mechanism and the drill bit is kept to be greater than 1/2 from the drill bit to the length of the drill hole opening in the drilling process, so that the distance between the supporting mechanism and the drill bit is enough to limit the direction of a drill rod, and the direction of the drill rod is vertical;

3) the inner ring of the connecting bearing and the drill rod rotate together through the connecting bearing, the outer ring of the connecting bearing and the interior of the pile hole are relatively static, the drill rod rotates while the position of the drill rod is limited by the supporting rod, and the contact between the supporting rod and the inner wall of the pile hole is not influenced;

4) the controller controls the support rod to stretch out and draw back, so that the support mechanism can be fixed in the pile hole and detached from the pile hole;

5) the pressure sensor monitors the pressure of the support rod on the inner wall of the pile hole, so that the support mechanism is ensured to be firmly fixed in the pile hole, and the inner wall of the pile hole is also ensured not to be damaged;

6) the invention controls the lifting of the supporting mechanism through the take-up and pay-off of the take-up device, thereby realizing the adjustment of the distance between the supporting mechanism and the drill bit;

7) according to the invention, 2 wire winders are supported not only by the vertical direction of the support rod but also by the lateral direction of the drill rod through the stabilizing bearing, so that the positions of the wire winders are more stable.

Drawings

FIG. 1 is a schematic perspective view of example 1 of the present invention;

FIG. 2 is a side view of example 1 of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a partial view at B of FIG. 3;

FIG. 5 is a partial view at C of FIG. 3;

FIG. 6 is a perspective view of a support mechanism according to embodiment 1 of the present invention;

fig. 7 is a perspective view of a wire rewinding device according to embodiment 1 of the present invention;

fig. 8 is a circuit connection block diagram of embodiment 1 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1 was carried out: referring to fig. 1 to 8, in order to ensure that a pile hole 1-1 does not incline without increasing cost or slowing down the progress of the project, the invention provides a deviation rectifying method for a bedrock pile foundation, which comprises the following steps: s01, drilling an initial pile hole on the bedrock 1; s02, the support mechanism 4 is rotatably connected to the drill rod 3, the support mechanism 4 is arranged in the initial pile hole, the side portion of the support mechanism 4 contacts the inner wall of the pile hole 1-1, the central axis of the support mechanism 4 is overlapped with the central axis of the initial pile hole, and drilling is continued on the basis of the initial pile hole.

In order to ensure that the support means 4 is sufficiently distant from the drill bit 2 to limit the direction of the drill rod 3 such that the drill rod 3 is oriented vertically, the method further comprises: the distance of the support means 4 from the drill head 2 is kept during drilling greater than 1/2 from the drill head 2 to the length of the drill opening.

In order to ensure that the support rod 4-2 defines the orientation of the drill rod 3 while the drill rod 3 rotates without affecting the contact between the support rod 4-2 and the inner wall of the pile hole 1-1, the support mechanism 4 further comprises: the connecting bearing 4-1 is connected, an inner ring of the connecting bearing 4-1 is non-cylindrical, the drill rod 3 is matched with the inner ring of the connecting bearing 4-1, the inner ring of the connecting bearing 4-1 is sleeved on the drill rod 3, and the central axis of the connecting bearing 4-1 is superposed with the central axis of the drill rod 3; the support rods 4-2 are arranged, the number of the support rods 4-2 is more than 3, the 3 support rods 4-2 are uniformly distributed on an outer ring of the connecting bearing 4-1 around the connecting bearing 4-1 for a circle, and the support rods 4-2 are perpendicular to the central axis of the connecting bearing 4-1.

In order to make the supporting mechanism 4 be able to be fixed in the pile hole 1-1 and removed from the pile hole 1-1, further, the supporting mechanism further comprises: and the support rod 4-2 is an electric hydraulic pump, and the support rod 4-2 is connected with the controller 8 through a lead. Specifically, the controller 8 here may employ a control component with peripheral circuits such as a PLC.

In order to ensure that the supporting mechanism 4 is firmly fixed in the pile hole 1-1 and simultaneously ensure that the inner wall of the pile hole 1-1 is not damaged, further, the method comprises the following steps: the pressure sensor 4-3 is arranged between the support rod 4-2 and the connecting bearing 4-1, and the pressure sensor 4-3 is connected with the controller 8 through a lead.

In order to realize the adjustment of the distance between the support mechanism 4 and the drill bit 2, further, the method further comprises the following steps: the wire winding device 5 at least comprises 2 wire winding devices 5, wherein the 2 wire winding devices 5 are symmetrically connected to the ground on two sides of the drill rod 3 through support rods 4-2, the lower ends of wires 5-1 of the 2 wire winding devices 5 are symmetrically and fixedly connected with the upper surface of an outer ring of a connecting bearing 4-1, and the wire winding devices 5 are connected with a controller 8 through wires.

In order to make the position of the wire rewinding device 5 more stable, further, the wire rewinding device further comprises: the stable bearing 7, the inner ring of stable bearing 7 and drilling rod 3 phase-match, the inner ring of stable bearing 7 cup joints on drilling rod 3, and the outer loop and the spooler 5 fixed connection of stable bearing 7.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.