CN114108604B

CN114108604B - Automatic pile sinking implantation method for high backfill region

Info

Publication number: CN114108604B
Application number: CN202111532735.5A
Authority: CN
Inventors: 邓安; 徐建骁; 李艳; 彭亮
Original assignee: China MCC5 Group Corp Ltd
Current assignee: China MCC5 Group Corp Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-10-21
Anticipated expiration: 2041-12-15
Also published as: CN114108604A

Abstract

The invention belongs to the technical field of concrete pipe pile sinking, and discloses an automatic pile sinking implantation method in a high backfill region, which aims to solve the problem of high construction cost caused by implantation according to the operation experience of a driver. The automatic implantation method comprises a controller, a concrete pipe pile, a rotary excavating machine and a clamping mechanism, wherein the controller is used for controlling the working state of the rotary excavating machine, and the automatic implantation method comprises the following steps: (1) Preparing a concrete pipe pile in advance, wherein the periphery of the concrete pipe pile is provided with a large-pitch thread; (2) The method comprises the following steps that a clamping mechanism is installed on a rotating head of a rotary excavator, a concrete pipe pile is clamped by a clamping framework, the central axis of the concrete pipe pile is aligned with an implanted position, and a torque sensor is installed between the clamping mechanism and the concrete pipe pile; (3) The rotary excavating machine starts to rotate to drive the concrete pipe pile to be implanted into a high backfill region in a rotating mode; (4) The torque sensor collects torque information between the clamping mechanism and the concrete pipe pile and transmits the torque information to the controller, and the controller controls the rotary excavating machine to execute corresponding actions according to the received torque information.

Description

Automatic pile sinking implantation method in high backfill region

Technical Field

The invention belongs to the technical field of concrete pipe pile sinking, and particularly relates to an automatic pile sinking implantation method in a high backfill region.

Background

In the high backfill region, because the soil body is soft and the density of the soil body is not enough, the bearing capacity of the soil body is generally improved by a pile planting mode in the high backfill region.

At present, a plurality of pile sinking methods for precast concrete tubular piles are adopted: the method mainly comprises the construction methods such as a hammering method, a static pressure method, a hole-leading pile-sinking method, a drilling pile-planting method, a middle digging method and the like. The hammering method is characterized in that: the construction method has no relation with the depth of the supporting layer and the underground water, and can be used for construction on various soil qualities; construction management can be carried out according to the recording during driving, and the bearing capacity of all piles can be mastered; but the construction will produce vibration and noise, and the diesel pile driver will emit oil smoke. The pre-drilling construction method has the advantages of small vibration and noise, less damage to a pile body during construction, soil formation in a digging hole when the pile is dug by a drill rod, even if a sand layer and a hole wall are little collapsed, less soil discharge amount when a pile tip is open, higher verticality when the pile is buried by rotation, less residual amount of a pile head, high construction precision, no need of investigating the influence on the surrounding environment when the foundation is widened, but attention needs to be paid to prevent the flow of a fixing liquid and a foundation protection liquid around the pile, and the distribution condition of a supporting layer needs to be fully investigated in advance. The layer construction method of digging vibrates, the noise is less, excavates along the cavity of stake, and the stake plays sheathed tube effect, sinks when excavating, and is less to the influence of surrounding building, even continuous more closely knit sand bed, also is under construction easily, sinks to put and can stand great pressure and lightly hammer, so the pile head can be more parallel and level.

The pile-sinking method is a new construction method which is rapidly developed in recent years, has obvious advantages compared with the conventional hammering method or static pressure method, and in some areas with dense buildings or complicated geology, the pile pipe adopts the direct hammering method or the static pressure method, on one hand, the pile sinking is difficult, the resistance is large, the pile body is easy to damage when the pile pipe is forced to pass through, and on the other hand, the peripheral buildings or the pipe network lines are easy to be influenced to a certain extent after the soil body is extruded. The pile sinking by adopting the implantation method can be realized by pre-drilling to a determined holding force layer and then implanting the pile, so that the driving quality of the tubular pile can be better ensured. The pile shape is characterized in that pile sinking resistance of the pile tip of the pipe pile is reduced by a pre-hole forming mode, and in addition, the gaps between the pipe pile and a hole forming hole wall and the gaps between side wall soil layers are filled by post-grouting, so that the pile side resistance of the high-strength prestressed pipe pile can be effectively improved, and the requirement of improving the bearing capacity of a single pile is met.

At present, a pile planting method is generally adopted to plant a precast concrete pipe pile in a high backfill region, but the construction method has the problem of low efficiency, although the drilling speed of a pile hole in the high backfill region is high, the pipe pile can be planted in the soil body only by using modes such as hammering or static pressure due to the fact that the hole crossing condition frequently occurs due to the poor compactness of the soil body, and the construction period is long and the construction cost is high.

In addition, in the prior art, when hammering, static pressure and pile sinking implantation methods are adopted, implantation is carried out according to the operation experience of a driver, the state of the concrete pipe pile can be judged in a detection mode after implantation, and after damage is detected after implantation, the concrete pipe pile can be abandoned and implanted again.

Disclosure of Invention

The invention provides an automatic pile sinking implantation method in a high backfill region, which aims to solve the problem of high construction cost caused by implantation according to the operation experience of a driver, and can greatly improve the efficiency of pipe pile implantation in the high backfill region and reduce the cost of pipe pile implantation.

In order to solve the technical problem, the technical scheme adopted by the invention is as follows:

the automatic pile sinking implantation method in the high backfill region is characterized by comprising a controller, a concrete pipe pile, a rotary excavating machine and a clamping mechanism, wherein the controller is used for controlling the working state of the rotary excavating machine, and the automatic implantation method comprises the following steps:

(1) Preparing a concrete pipe pile in advance, wherein the periphery of the concrete pipe pile is provided with a large-pitch thread;

(2) Installing a clamping mechanism on a rotating head of the rotary excavating machine, clamping the concrete pipe pile by using a clamping framework, aligning the central axis of the concrete pipe pile with an implanted position, and installing a torque sensor between the clamping mechanism and the concrete pipe pile;

(3) The rotary excavating machine starts to rotate to drive the concrete pipe pile to be implanted into a high backfill region in a rotating mode;

(4) The torque sensor collects torque information between the clamping mechanism and the concrete pipe pile and transmits the torque information to the controller, and the controller controls the rotary excavating machine to execute corresponding actions according to the received torque information; and if the torque information received by the torque sensor reaches 70-80% of the torsional strength of the concrete pipe pile, controlling the rotary excavator to rotate reversely for a certain time by the controller, then controlling the rotary excavator to lift upwards for a certain height, and then controlling the rotary excavator to rotate forwards again to drive the concrete pipe pile to be implanted into a high backfill region.

In some embodiments, the torque resistance strength of the concrete pipe pile and the position where each concrete pipe pile is implanted are recorded in the controller in advance.

In some embodiments, the controller is located on the rotary excavating machine or on the handheld terminal.

In some embodiments, the lower end of the concrete pipe pile has a truncated cone-shaped or conical tip.

In some embodiments, fixture includes the fixed end plate that is used for with the rotating head interconnect of rotary machine, the first grip block of below fixedly connected with of fixed end plate, first grip block articulates there is the second grip block, the cavity that first grip block and second grip block formed can cladding concrete pipe pile and with the mutual adaptation of concrete pipe pile's external diameter.

In some embodiments, one side of the first clamping plate and one side of the second clamping plate are hinged to each other through a pin shaft, and the other side of the first clamping plate and the other side of the second clamping plate are detachably connected through a locking screw and a locking nut.

In some embodiments, the middle part of fixed end plate is provided with the guide bar, the periphery of guide bar has set the recipient, the length of recipient and the inside degree of depth mutual adaptation of concrete pipe pile, set up two at least spouts that set up along vertical direction on the recipient, set up the strip groove that communicates each other with the spout on the outer periphery wall and the interior circumference wall of recipient, set the recipient in the spout, the medial surface of recipient can stretch the inner chamber of recipient and laminate each other with the guide bar that inserts in the recipient inner chamber.

In some embodiments, the guide rod has a rectangular transverse cross section, at least two surfaces of the guide rod are inclined surfaces, and the inner side surface of the extrusion block, which extends into the inner cavity of the extrusion container, is a wedge-shaped surface matched with the inclined surfaces.

In some embodiments, the sliding groove is provided with a return spring for returning the extrusion block.

In some embodiments, the rotary excavating machine rotates the first clamping plate and the second clamping plate together to be screwed into soil in the high backfill region when being planted, then excavates the bottom exposed out of the first clamping plate and the second clamping plate, loosens the locking screw and the locking nut of the first clamping plate and the second clamping plate, and lifts the rotary excavating machine to drive the clamping mechanism to be separated from the concrete tubular pile.

Compared with the prior art, the invention has the following beneficial effects:

according to the automatic pile sinking implantation method for the high backfill region, the controller is used for controlling the rotary digging machine to perform corresponding actions, compared with the prior art that a manual driving rotary digging mode is adopted, the labor intensity can be greatly reduced, the working state can be adjusted according to set parameters, compared with the manual driving mode, the concrete pipe pile implantation process can be accurately controlled, and the risk of damage to the concrete pipe pile implantation is greatly reduced. In the prior art, when a vertical pile is implanted, the operation is generally carried out by the experience of a driver, the problem of damage of the concrete pipe pile is very easy to occur, the state of the concrete pipe pile can be judged by a detection mode after the concrete pipe pile is implanted, and the concrete pipe pile can be abandoned and implanted again after the damage is detected after the concrete pipe pile is implanted. According to the invention, the working state of the rotary excavating machine is controlled by the controller, on one hand, implantation is carried out according to set parameters (torsional strength) and the working state can be timely adjusted according to the situation; on the other hand, even when moment is greater than the torsional strength of this concrete pipe pile, also can in time discover through torque sensor to stop the implantation of high concrete pipe pile, thereby greatly reduced this concrete pipe pile back end is implanted and is detected the cost that the cost spent.

The invention directly utilizes the clamping mechanism to clamp the concrete pipe pile, and then utilizes the downward pressure and the rotation action of the rotary excavating machine to implant the concrete pipe pile into the soil body of the high backfill region, thereby completing the foundation reinforcement of the high backfill region. Compared with the prior art that a hammering mode is adopted, the concrete pipe pile can be prevented from being damaged by hammering (particularly, when the concrete pipe pile in a high backfill region meets boulders, the pipe pile is particularly easy to damage); compared with a static pressure implantation mode, the implantation speed of the concrete pipe pile can be increased; compared with a pile implanting and sinking method, pile holes do not need to be formed, the backfill amount of the pile holes is greatly reduced (only the first clamping plate and the second clamping plate need to be dug and backfilled), and the construction period and the cost can be greatly reduced.

According to the clamping mechanism, the concrete pipe pile can be clamped from the outside by utilizing the first clamping plate and the second clamping plate, the extrusion block slides in the sliding groove by utilizing the mutual matching between the inclined surface of the guide rod and the wedge-shaped surface on the extrusion block, so that the extrusion block extends out of the strip-shaped groove and is in contact and abutted with the inner wall of the concrete pipe pile, the acting force of the rotary excavator during rotation is gradually transmitted to the whole concrete pipe pile, and the condition that the concrete pipe pile is damaged during rotary implantation is avoided. The pile sinking method of the invention is only suitable for the foundation reinforcement in high backfill areas. For other areas, the concrete pipe pile is easy to damage due to the fact that the density of rock and soil bodies is high. And the concrete pipe pile cannot be damaged due to the fact that the soil body in the high backfill region is soft and low in compactness.

Drawings

FIG. 1 is a schematic view of a clamping mechanism according to the present invention;

FIG. 2 is a schematic view of the connection of a first clamping plate and a second clamping plate of the present invention;

FIG. 3 is a schematic view of the connection of the extrusion blocks to the extrusion container of the present invention;

the mark in the figure is: 1. the device comprises a fixed end plate, 2, a first clamping plate, 3, a second clamping plate, 4, a guide rod, 5, an extrusion container, 6, a pull rope, 7, a sliding groove, 8, a strip-shaped groove, 9, an extrusion block, 10 and a return spring.

Detailed Description

The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments used by those skilled in the art without any creative effort belong to 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; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

With reference to the attached drawings, the automatic pile sinking implantation method for the high backfill region comprises a controller, a concrete pipe pile, a rotary excavating machine and a clamping mechanism, wherein the controller is used for controlling the working state of the rotary excavating machine, and the automatic implantation method comprises the following steps:

(4) The torque sensor acquires torque information between the clamping mechanism and the concrete pipe pile and transmits the torque information to the controller, and the controller controls the rotary excavating machine to execute corresponding actions according to the received torque information; and if the torque information received by the torque sensor reaches 70-80% of the torsional strength of the concrete pipe pile, controlling the rotary excavator to rotate reversely for a certain time by the controller, then controlling the rotary excavator to lift upwards for a certain height, and then controlling the rotary excavator to rotate forwards again to drive the concrete pipe pile to be implanted into a high backfill region.

In some embodiments, the controller is located on the rotary excavating machine or on the handheld terminal. Because the pile planting is generally carried out in the field (or the working environment is relatively simple), the code for controlling the working state of the rotary excavating machine and the torsional strength of the concrete pipe pile are written into the rotary excavating machine or a handheld terminal by utilizing the prior art, and when the rotary excavating machine starts to carry out rotary implantation, the working state of the rotary excavating machine can be controlled by utilizing the controller. The driver only assists in clamping the concrete pipe pile and drives the rotary machine to the implantation position. The concrete implantation process is completely operated by the controller, so that the concrete pipe pile is automatically implanted.

In some embodiments, the controller obtains the implantation depth of the rotary excavator (obtaining the descending height of a drill rod of the rotary excavator can obtain the implantation depth), and when the implantation depth reaches a set value, the controller controls the rotary excavator to stop rotating.

In some embodiments, the lower end of the concrete pipe pile has a truncated cone-shaped or conical tip. Thereby being convenient for the concrete pipe pile to eat into the soil body in the high backfill region by utilizing the pointed end.

In some embodiments, fixture includes the fixed end plate 1 that is used for with the rotating head interconnect of rotary machine, the first grip block 2 of below fixedly connected with of fixed end plate 1, first grip block 2 articulates there is second grip block 3, and the cavity that first grip block 2 and second grip block 3 formed can the cladding concrete pipe pile and with the mutual adaptation of the external diameter of concrete pipe pile. The first clamping plate and the second clamping plate form a tubular structure, so that the concrete pipe pile is clamped in the first clamping plate and the second clamping plate.

In some embodiments, one side of the first clamping plate 2 and one side of the second clamping plate 3 are hinged to each other through a pin shaft, and the other side of the first clamping plate and the other side of the second clamping plate are detachably connected through a locking screw and a locking nut.

In some embodiments, the middle part of fixed end plate 1 is provided with guide bar 4, the periphery of guide bar 4 has set recipient 5, the length of recipient 5 and the mutual adaptation of the inside degree of depth of concrete pipe pile, set up two at least spout 7 that set up along vertical direction on the recipient 5, set up the bar groove 8 with spout 7 intercommunication each other on the outer periphery wall and the interior circumference wall of recipient 5, set the dummy block 9 in the spout 7, the medial surface of dummy block 9 can stretch the inner chamber of recipient and with insert the guide bar of recipient inner chamber and laminate each other, the lateral surface of dummy block 9 can extend the bar groove and contact with the inner wall of concrete pipe pile. That is to say, when the recipient slided in the spout, the medial surface of recipient can extend into the inner chamber of recipient and be used for contacting with the guide bar, and under the squeezing action of guide bar, the lateral surface that the recipient can extend the outer wall of recipient thereby contacts with the inner wall of concrete pipe pile and supports and hold.

Wherein, torque sensor sets up the lateral surface (be used for the one side with concrete pipe pile contact) at the inside wall of first grip block and second grip block and extrusion piece.

In some embodiments, the guide rod 4 has a rectangular transverse cross section, at least two surfaces of the guide rod 4 are inclined surfaces, and the inner side surface of the extrusion block 9 extending into the inner cavity of the extrusion container 4 is a wedge surface matched with the inclined surfaces. That is, the inclined surface of the guide rod and the wedge-shaped surface of the extrusion block are matched with each other to drive the extrusion block to slide in the sliding groove.

In some embodiments, the chute 7 has a return spring 10 therein for returning the pressing block 9. When the guide rod is separated and is not in contact with the extrusion block, the outer side surface of the extrusion block can retract into the extrusion cylinder under the action of the return spring 10 (namely, the extrusion block is not in contact with the concrete pipe pile any more, so that the automatic separation of the extrusion cylinder and the concrete pipe pile is realized).

Wherein the upper end of the guide rod 4 and the upper end of the extrusion container 5 are connected with each other by a pull rope 6. When the clamping mechanism is used for clamping, firstly, the extrusion cylinder is placed in the inner wall of the concrete pipe pile, then the concrete pipe pile and the extrusion cylinder are vertically lifted together in a lifting mode, then the guide rod is gradually inserted from the upper end of the concrete pipe pile, the extrusion block gradually extends out of the extrusion cylinder under the action of the guide rod along with the fact that the guide rod extends into the extrusion cylinder, when the guide rod is just inserted into the inner bottom of the concrete pipe pile, the extrusion block is just tightly attached to the concrete pipe pile, so that the concrete pipe pile is clamped on the clamping mechanism from the inside of the concrete pipe pile, and then the pull rope is buckled, so that the guide rod and the extrusion cylinder are connected into a whole; and then the first clamping plate and the second clamping plate are connected together through a locking screw rod and a locking nut, so that the concrete pipe pile is coated from the outside. And then the concrete pipe pile is stably clamped on the clamping mechanism.

In some embodiments, in order to improve the clamping tightness of the concrete pipe pile, the outer cross section of the upper end of the concrete pipe pile is rectangular, and the first clamping plate and the second clamping plate form a rectangular clamping space.

Wherein, preferred, the height of first grip block and second grip block is 0.5-1m to carry out centre gripping fastening to the upper segment of concrete pipe pile, and with the effort disperse gradually to the upper segment of concrete pipe pile.

According to the automatic pile sinking implantation method for the high backfill region, the concrete pipe pile is directly clamped by the clamping mechanism, and then the concrete pipe pile is implanted into the soil body of the high backfill region by utilizing the downward pressure and the rotation action of the rotary excavator, so that foundation reinforcement of the high backfill region is completed. Compared with the prior art that a hammering mode is adopted, the concrete pipe pile can be prevented from being damaged by hammering (particularly, when the concrete pipe pile in a high backfill region meets boulders, the pipe pile is particularly easy to damage); compared with a static pressure implantation mode, the implantation speed of the concrete pipe pile can be improved; compared with a pile-sinking implantation method, pile holes do not need to be formed, the backfill amount of the pile holes is greatly reduced (only the first clamping plate and the second clamping plate need to be dug and backfilled), and the construction period and the cost can be greatly reduced.

When a concrete pipe pile is implanted, a first clamping plate and a second clamping plate are firstly excavated, the connection between the first clamping plate and the second clamping plate is released, then a rotary excavator is used for driving a clamping mechanism to move upwards, a guide rod also moves upwards along with the clamping mechanism, an extrusion block loses the extrusion effect of the guide rod and automatically retracts under the action of a return spring, so that the extrusion block is separated from the inner wall of the concrete pipe pile, and when the guide rod continues to move upwards, an extrusion cylinder is driven to move upwards under the action of a pull rope, so that the concrete pipe pile is completely separated from the whole clamping mechanism.

Meanwhile, compared with the prior art that hammering, static pressure, pile sinking implantation and the like are adopted, the method can reduce disturbance to the soil body in the high backfill region.

Claims

1. The automatic pile sinking implantation method in the high backfill region is characterized by comprising a controller, a concrete pipe pile, a rotary excavating machine and a clamping mechanism, wherein the controller is used for controlling the working state of the rotary excavating machine, and the automatic implantation method comprises the following steps:

(2) Installing a clamping mechanism on a rotating head of the rotary excavating machine, clamping the concrete pipe pile by using a clamping framework, aligning the central axis of the concrete pipe pile with an implanted position, and installing a torque sensor between the clamping mechanism and the concrete pipe pile; the clamping mechanism comprises a fixed end plate which is used for being mutually connected with a rotating head of the rotating machine, a first clamping plate is fixedly connected below the fixed end plate, the first clamping plate is hinged with a second clamping plate, and a cavity formed by the first clamping plate and the second clamping plate can cover the concrete pipe pile and is mutually matched with the outer diameter of the concrete pipe pile; one sides of the first clamping plate and the second clamping plate are hinged with each other through a pin shaft, and the other sides of the first clamping plate and the second clamping plate are detachably connected through a locking screw and a locking nut; the middle part of the fixed end plate is provided with a guide rod, the periphery of the guide rod is provided with an extrusion cylinder, the length of the extrusion cylinder is matched with the internal depth of the concrete pipe pile, the extrusion cylinder is provided with at least two sliding grooves arranged along the vertical direction, the outer circumferential wall and the inner circumferential wall of the extrusion cylinder are provided with strip-shaped grooves communicated with the sliding grooves, an extrusion block is arranged in each sliding groove, and the inner side surface of the extrusion block can extend into the inner cavity of the extrusion cylinder and is mutually attached to the guide rod inserted into the inner cavity of the extrusion cylinder; the transverse section of the guide rod is rectangular, at least two surfaces on the guide rod are inclined surfaces, and the inner side surface of the extrusion block, which extends into the inner cavity of the extrusion container, is a wedge-shaped surface matched with the inclined surfaces;

2. The automatic pile sinking implantation method for the high backfill region according to claim 1, wherein the torque resistance strength of the concrete pipe piles and the implantation positions of the concrete pipe piles are recorded in the controller in advance.

3. The automatic high backfill area pile driving implantation method according to claim 1, wherein the controller is located on a rotary excavating machine or on a handheld terminal.

4. The automatic pile sinking implanting method for the high backfill region according to claim 1, wherein the lower end of the concrete pipe pile is provided with a truncated cone-shaped or cone-shaped tip.

5. The automatic pile driving method for high backfill area according to claim 1, wherein the chute has a return spring therein for returning the squeeze block.

6. The method for automatically implanting the driven pile in the high backfill area according to claim 5, wherein the rotary excavator rotates the first clamping plate and the second clamping plate together to implant the driven pile in the soil body in the high backfill area, excavates the bottom of the exposed first clamping plate and the bottom of the exposed second clamping plate, releases the locking screw and the locking nut of the first clamping plate and the second clamping plate, and lifts the rotary excavator to drive the clamping mechanism to separate the concrete tubular pile from the concrete tubular pile.