阅读说明：本技术 一种基于现浇大直径管桩的扩底装置及扩底方法 (Bottom expanding device and method based on cast-in-place large-diameter tubular pile ) 是由 汪磊 夏京 朱敏 于 2021-08-28 设计创作，主要内容包括：本说明书一个或多个实施例提供一种基于现浇大直径管桩的扩底装置及扩底方法,先通过施工现浇大直径管桩,再沿管桩顶端一周铺设装配环状导轨,并将水刀切割机构顶端连接于环状导轨上,水刀切割机构底端竖直伸入管桩底端的扩大头部分,并连接有束流喷嘴,同时设置有泥浆吸出机构,泥浆吸出机构底端竖直伸入管桩底端的扩大头部分,并连接有泥浆泵,通过控制水刀切割机构沿环状导轨并贴近管桩内侧壁周向转动,以带动束流喷嘴环向行走切割,同时利用泥浆泵把切割产生的泥浆吸出,并通过调节部用于伸缩调节束流喷嘴不同竖向高度,以使桩底端形成满足设计要求的扩大头,从而大幅度提升管桩的承载能力。(One or more embodiments of the present disclosure provide a bottom expanding device and a bottom expanding method based on a cast-in-place large-diameter tubular pile, where the cast-in-place large-diameter tubular pile is constructed, an annular guide rail is laid and assembled along a circumference of a top end of the tubular pile, a top end of a water jet cutting mechanism is connected to the annular guide rail, a bottom end of the water jet cutting mechanism vertically extends into an enlarged head portion of the bottom end of the tubular pile, a beam nozzle is connected to the enlarged head portion, and a slurry suction mechanism is also provided, a bottom end of the slurry suction mechanism vertically extends into the enlarged head portion of the bottom end of the tubular pile, and a slurry pump is connected to the enlarged head portion, the water jet cutting mechanism is controlled to rotate circumferentially along the annular guide rail and close to an inner side wall of the tubular pile to drive the beam nozzle to move circumferentially, and simultaneously the slurry generated by cutting is sucked out by the slurry pump, and different vertical heights of the beam nozzle are telescopically adjusted by an adjusting portion, so that the bottom end of the tubular pile forms an enlarged head satisfying design requirement, thereby greatly improving the bearing capacity of the tubular pile.)

1. The utility model provides an expand end device based on cast-in-place major diameter tubular pile which characterized in that includes:

the annular guide rail is paved and assembled on the top end of the tubular pile for one circle;

the top end of the water jet cutting mechanism is connected to the annular guide rail so as to rotate circumferentially along the annular guide rail and close to the inner side wall of the tubular pile, and the bottom end of the water jet cutting mechanism vertically extends into an enlarged head part at the bottom end of the tubular pile and is connected with a beam nozzle for annular walking cutting;

the bottom end of the slurry suction mechanism vertically extends into the enlarged head part at the bottom end of the tubular pile, is connected with a slurry pump and is used for sucking slurry;

and the vertical adjusting part is arranged on the water jet cutting mechanism and used for telescopically adjusting the vertical height of the beam flow nozzle.

2. The bottom expanding device based on the cast-in-place large-diameter tubular pile of claim 1, wherein the water jet cutting mechanism comprises a guide rod, the guide rod vertically penetrates into the tubular pile to press close to the circumferential rotation of the inner side wall of the tubular pile, a jet water pipe is arranged inside the guide rod, and one end of the jet water pipe is connected with a high-pressure pump.

3. The bottom expanding device based on the cast-in-place large-diameter tubular pile of claim 2, wherein the vertical adjusting portion comprises a hydraulic oil cylinder, the top end of the hydraulic oil cylinder is connected to the annular guide rail, and the bottom end of the hydraulic oil cylinder is connected to the top end of the guide rod.

4. The bottom expanding device based on the cast-in-place large-diameter tubular pile of claim 1, wherein the slurry sucking mechanism comprises a slurry pipe, and the slurry pipe vertically penetrates into the tubular pile to be connected to the slurry pump.

5. The bottom expanding device based on the cast-in-place large-diameter tubular pile of claim 1, wherein the beam nozzles comprise vertical section nozzles, telescopic section nozzles and nozzle sprayers, the vertical section nozzles are connected to the bottom end of the water jet cutting mechanism, the telescopic section nozzles are transversely connected to the bottom end of the vertical section nozzles and used for transverse telescopic adjustment, and the nozzle sprayers are connected to the head ends of the telescopic section nozzles to spray and cut towards the radial direction of the bottom end of the tubular pile.

6. The bottom expanding device based on the cast-in-place large-diameter tubular pile of claim 1, wherein a radar range finder is arranged on the beam flow nozzle and used for automatically sensing the distance between the beam flow nozzle and the soil body to be cut.

7. The bottom expanding device based on the cast-in-place large-diameter tubular pile according to claim 1, further comprising a control system, wherein the control system is electrically connected with the water jet cutting mechanism, the slurry suction mechanism, the vertical adjusting part and the beam current nozzle respectively and used for controlling and adjusting cutting operation.

8. A bottom expanding method based on a cast-in-place large-diameter tubular pile is characterized by comprising the following steps:

a: constructing a cast-in-situ large-diameter tubular pile;

b: after the concrete of the pile body of the tubular pile reaches a certain strength, arranging an annular guide rail along the circumference of the top end of the tubular pile;

c: a water jet cutting mechanism is arranged on the annular guide rail, and a right-angle telescopic beam flow nozzle is arranged at the bottom end of the water jet cutting mechanism;

d: the water jet cutting mechanism vertically penetrates into the expansion head part at the bottom end of the tubular pile, and the beam nozzles are enabled to move in the annular direction close to the inner side wall of the tubular pile by controlling the water jet cutting mechanism to rotate in the circumferential direction along the annular guide rail so as to cut the soil body at the bottom end of the tubular pile;

e: a mud sucking mechanism vertically penetrates through the tubular pile to suck out mud generated by cutting;

f: and pouring concrete to the enlarged head formed by cutting.

9. The bottom expanding method based on the cast-in-place large-diameter tubular pile according to claim 8, characterized by further comprising:

g: dispose control system, will in advance tubular pile bottom enlarged footing design size data input in control system, through control system automatic control beam current nozzle walking speed, cutting pressure, vertical movement and horizontal flexible, so that beam current nozzle and cutting soil body remain fixed distance throughout to reach corresponding cutting shape size requirement.

Technical Field

One or more embodiments of the present disclosure relate to the technical field of bottom expanding of a large-diameter tubular pile, and in particular, to a bottom expanding device and a bottom expanding method based on a cast-in-place large-diameter tubular pile.

Background

The pedestal pile is a cast-in-place pile with the diameter of the bottom larger than that of the upper pile body, the bearing capacity of a single pile is greatly improved compared with that of a straight pile with the same diameter of the pile body, and the pedestal pile can be divided into a drilling pedestal pile, a blasting pile and a shock impact pedestal pile according to the pile forming mode.

The bored and bottom-expanded cast-in-place pile is a relatively new construction method, and is an improvement and innovation on the bored and bottom-expanded cast-in-place pile. After the required bearing layer is reached by drilling, the diameter of pile end is enlarged by using special drill bit at pile end, so that the ultimate bearing capacity of pile is greatly increased as compared with that of cast-in-place pile without enlarged head. For many high-rise buildings, the bored and bottom-expanded cast-in-place pile can be used for finishing the hole in strongly weathered rock, so that the defects of other pile types can be overcome, and the economic benefit is remarkable.

The bored pile has greatly raised bearing capacity, and the soil layer and weathered rock layer with excellent mechanical property in the covering layer may be used as the expanding head bearing layer to reduce pile length and construction difficulty. In the construction method, the key point is whether the diameter of the enlarged base of the enlarged head meets the design requirement or not. And (4) according to the actually required enlarged bottom diameter of the engineering, determining the corresponding enlarged bottom stroke in the field by testing. Before the bottom-expanding drill bit enters the hole, the overall strength is firstly checked, whether the bottom-expanding drill bit can stretch freely or not is judged, and after the bottom-expanding drill bit falls to the bottom of the hole, a stroke limiter is installed on the driving drill rod so as to determine the diameter of the bottom expanding. When the active drill rod scale reaches the position of the limiter, the pile end expanded head is expanded to the corresponding diameter, and the construction of the pile end of the bored pile is finished.

However, the above prior art bellout technique has the following disadvantages: the pile end expanded head construction difficulty of the drilling expanded-base cast-in-place pile is large, and the expanded-base diameter of the expanded head is not easy to control; the manual hole digging club-footed pile needs manual digging, and in order to ensure the safety of hole digging workers, the use conditions are limited by factors such as geological conditions, pile length and the like.

Disclosure of Invention

In view of the above, an object of one or more embodiments of the present disclosure is to provide a bottom expanding device and a bottom expanding method based on a cast-in-place large-diameter tubular pile, so as to solve all or one of the problems in the background art.

In view of the above, one or more embodiments of the present specification provide a bottom expanding device based on a cast-in-place large-diameter tubular pile, including:

the annular guide rail is paved and assembled on the top end of the tubular pile for one circle;

the top end of the water jet cutting mechanism is connected to the annular guide rail so as to rotate circumferentially along the annular guide rail and close to the inner side wall of the tubular pile, and the bottom end of the water jet cutting mechanism vertically extends into an enlarged head part at the bottom end of the tubular pile and is connected with a beam nozzle for circular traveling cutting;

the bottom end of the slurry suction mechanism vertically extends into the enlarged head part at the bottom end of the tubular pile and is connected with a slurry pump for sucking slurry;

and the vertical adjusting part is arranged on the water jet cutting mechanism and used for telescopically adjusting the vertical height of the beam flow nozzle.

Preferably, water sword cutting mechanism is including the guide bar, and the guide bar is vertical to be run through in stretching into the tubular pile to press close to tubular pile inside wall circumferential direction, the inside efflux water pipe that is provided with of guide bar, efflux water pipe one end is connected with the high-pressure pump.

Preferably, the vertical adjusting part comprises a hydraulic oil cylinder, the top end of the hydraulic oil cylinder is connected to the annular guide rail, and the bottom end of the hydraulic oil cylinder is connected to the top end of the guide rod.

Preferably, the mud sucking mechanism comprises a mud pipe, and the mud pipe vertically penetrates into the pipe pile to be connected to a mud pump.

Preferably, the beam current nozzle comprises a vertical section nozzle, a telescopic section nozzle and a nozzle spray head, the vertical section nozzle is connected to the bottom end of the water jet cutting mechanism, the telescopic section nozzle is transversely connected to the bottom end of the vertical section nozzle and used for transverse telescopic adjustment, and the nozzle spray head is connected to the head end of the telescopic section nozzle and used for spraying and cutting in the radial direction towards the bottom end of the tubular pile.

Preferably, the beam nozzle is provided with a radar distance meter for automatically sensing the distance to cut the soil body.

Preferably, the device is further provided with a control system, and the control system is respectively electrically connected with the water jet cutting mechanism, the slurry suction mechanism, the vertical adjusting part and the beam current nozzle and is used for controlling and adjusting cutting operation.

A bottom expanding method based on a cast-in-place large-diameter tubular pile is characterized by comprising the following steps:

a: constructing a cast-in-situ large-diameter tubular pile;

b: after the concrete of the pile body of the tubular pile reaches a certain strength, installing an annular guide rail along the circumference of the top end of the tubular pile;

c: a water jet cutting mechanism is arranged on the annular guide rail, and a right-angle telescopic beam nozzle is arranged at the bottom end of the water jet cutting mechanism;

d: the water jet cutting mechanism vertically penetrates into the expansion head part at the bottom end of the tubular pile, and the beam nozzle is enabled to move close to the inner side wall of the tubular pile in the annular direction by controlling the water jet cutting mechanism to rotate along the circumferential direction of the annular guide rail so as to cut the soil body at the bottom end of the tubular pile;

e: a mud sucking mechanism vertically penetrates through the tubular pile to suck out mud generated by cutting;

f: and pouring concrete to the enlarged head formed by cutting.

Preferably, the method further comprises the following steps: and a control system is configured, designed size data of the expanded head at the bottom end of the tubular pile is input into the control system in advance, and the traveling speed, the cutting pressure, the vertical movement and the transverse expansion of the beam nozzle are automatically controlled by the control system, so that the beam nozzle and a cut soil body are always kept at a fixed distance to meet the corresponding cutting shape and size requirements.

As can be seen from the above description, the bottom expanding device and the bottom expanding method based on a cast-in-place large-diameter tubular pile provided by one or more embodiments of the present specification have the following advantages: the diameter of the enlarged bottom of the enlarged head at the bottom end of the pile can be strictly controlled, and the construction quality of the enlarged head is improved; the cast-in-place large-diameter tubular pile constructed firstly is taken as a wall protection measure, so that the stability of the wall of the hole can be ensured, and the bottom expanding construction is not limited by factors such as geological conditions, pile length and the like, thereby improving the safety of the bottom expanding construction and ensuring the quality of the bottom expanding construction; the annular guide rail is arranged at the top end of the tubular pile, so that the water jet cutting mechanism runs along the fixed track, and the bottom expanding efficiency is effectively improved; according to the stratum change condition and the actual cutting effect, the control system can automatically adjust the running speed and the water pressure of the water jet cutting mechanism around the annular guide rail so as to ensure the bottom expanding construction efficiency and quality; inputting design size data of the expanded head at the bottom end of the tubular pile into a control system in advance, and enabling a beam nozzle to keep a fixed distance with a soil body through a radar distance meter according to the shape and size of the expanded head so as to achieve the optimal cutting effect; the water jet cutting mechanism cuts the soil body by using high-pressure water jet, is a cold cutting technology, and has small influence on the physical and mechanical properties of the soil body; under the condition of keeping beam current nozzle unsettled cutting, because the laminating cutting soil body encircles the cutting, need not very big cutting impact force, can not cause very strong back seat counter-force to beam current nozzle promptly to do benefit to and stabilize high-efficient cutting operation.

Drawings

In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only one or more embodiments of the present specification, and that other drawings may be obtained by those skilled in the art without inventive effort from these drawings.

FIG. 1 is a sectional elevation view of a bellout apparatus according to an embodiment of the present invention;

FIG. 2 is a top view of an apparatus for expanding a bottom according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a beam nozzle according to an embodiment of the present invention.

In the figure: 1. an annular guide rail; 2. a tubular pile; 3. a water jet cutting mechanism; 31. a guide bar; 32. a jet flow water pipe; 33. a high pressure pump; 4. a beam current nozzle; 41. a vertical segment nozzle; 42. a telescopic section nozzle; 43. a nozzle spray head; 5. a mud sucking mechanism; 51. a mud pipe; 6. a slurry pump; 7. a vertical adjustment portion; 8. and (5) controlling the system.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure is further described in detail below with reference to specific embodiments.

It is to be noted that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present specification should have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in one or more embodiments of the specification is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The utility model provides a club-footed device and club-footed method based on cast-in-place major diameter tubular pile, as shown in fig. 1 to 3, including annular guide rail 1, annular guide rail 1 is laid and is assembled in 2 top a week of tubular pile, be provided with water sword cutting mechanism 3, 3 tops of water sword cutting mechanism are connected on annular guide rail 1, can follow annular guide rail 1 and press close to 2 inside wall circumferential direction of tubular pile, the vertical enlarged head part that stretches into 2 bottoms of tubular pile in 3 bottoms of water sword cutting mechanism, and be connected with beam nozzle 4, be used for the cutting of hoop walking, be provided with mud suction mechanism 5, the vertical enlarged head part that stretches into 2 bottoms of tubular pile in 5 bottoms of mud suction mechanism, and be connected with slush pump 6, be used for sucking out mud, be equipped with vertical adjustment portion 7 on the water sword cutting mechanism 3, be used for the 4 vertical height of flexible regulation beam nozzle.

The invention firstly puts in place a large-diameter tubular pile 2 through construction by arranging an annular guide rail 1, after concrete of a pile body reaches a certain strength, then lays and assembles the annular guide rail 1 along the circumference of the top end of the tubular pile 2, and connects the top end of a water jet cutter mechanism 3 to the annular guide rail 1, the water jet cutter mechanism 3 vertically extends into the tubular pile 2 and is arranged close to the inner side wall of the tubular pile 2, wherein the bottom end of the water jet cutter mechanism 3 vertically extends into an enlarged head part at the bottom end of the tubular pile 2 and is connected with a beam flow nozzle 4, and is also provided with a slurry suction mechanism 5, the bottom end of the slurry suction mechanism 5 vertically extends into the enlarged head part at the bottom end of the tubular pile 2 and is connected with a slurry pump 6, and the water jet cutter mechanism 3 is provided with a vertical adjusting part 7, thereby driving the beam flow nozzle 4 to move annularly by controlling the water jet cutter mechanism 3 to rotate along the annular guide rail 1 and close to the inner side wall of the tubular pile 2 circumferentially, the bottom end expanding head part is attached and sprayed with high-pressure water columns to cut and expand the bottom, the mud generated by cutting is sucked out by a mud pump 6 and is used for telescopically adjusting different vertical heights of a beam current nozzle 4 through a vertical adjusting part 7 so as to form an expanding head meeting the design requirement at the bottom end of the pile, thereby greatly improving the bearing capacity of the tubular pile 2, strictly controlling the bottom expanding diameter of the expanding head at the bottom end of the pile and improving the construction quality of the expanding head, the cast-in-situ large-diameter tubular pile 2 constructed firstly is simultaneously taken as a wall protection measure to ensure the stability of a hole wall, so that the bottom expanding construction is not limited by factors such as geological conditions, pile length and the like, thereby improving the safety of the bottom expanding construction and ensuring the bottom expanding construction quality, the water jet cutting mechanism 3 runs along a fixed rail by installing the annular guide rail 1 at the top end of the tubular pile 2, effectively improving the bottom expanding efficiency and according to the stratum change condition and the actual cutting effect, the automatic adjustment water jet cutting mechanism 3 is around the functioning speed and the water pressure size of annular guide rail 1 to guarantee the construction efficiency and the quality of expanding the end, water jet cutting mechanism 3 utilizes the high pressure water jet to cut the soil body, is a cold cutting technique, and is less to the physical mechanics nature influence of the soil body, and keeps under the unsettled cutting condition of beam current nozzle 4, because the laminating cutting soil body encircles the cutting, need not very big cutting impact force, can not cause very strong back seat counter-force to beam current nozzle 4 promptly, in order to do benefit to stable high-efficient cutting operation.

In the embodiment of the invention, the water jet cutting mechanism 3 comprises a guide rod 31, the guide rod 31 vertically penetrates into the tubular pile 2 to be close to the inner side wall of the tubular pile 2 to rotate in the circumferential direction, a jet water pipe 32 is arranged inside the guide rod 31, and one end of the jet water pipe 32 is connected with a high-pressure pump 33 to realize ultrahigh-pressure water jet cutting.

In the embodiment of the invention, the vertical adjusting part 7 comprises a hydraulic oil cylinder, the top end of the hydraulic oil cylinder is connected to the annular guide rail 1, and the bottom end of the hydraulic oil cylinder is connected to the top end of the guide rod 31, so that different cutting heights can be adjusted in a vertical telescopic manner.

In the embodiment of the invention, the mud sucking mechanism 5 comprises a mud pipe 51, and the mud pipe 51 vertically penetrates into the tubular pile 2 to be connected to the mud pump 6.

In the embodiment of the invention, the beam nozzle 4 comprises a vertical section nozzle 41, a telescopic section nozzle 42 and a nozzle spray head 43, the vertical section nozzle 41 is connected to the bottom end of the water jet cutting mechanism 3, the telescopic section nozzle 42 is transversely connected to the bottom end of the vertical section nozzle 41 for transverse telescopic adjustment, and the nozzle spray head 43 is connected to the head end of the telescopic section nozzle 42 to spray and cut towards the radial direction of the bottom end of the tubular pile 2, so that the beam nozzle 4 is in a 90-degree right angle shape to cut towards the radial direction of the bottom end in an oriented manner, and not only can the height be freely adjusted by lifting the guide rod 31, but also the horizontal distance can be adjusted by transversely telescoping the telescopic section nozzle 42 to keep the cutting distance in an oriented and stable manner.

In the embodiment of the invention, the beam nozzle 4 is provided with a radar range finder for automatically sensing and cutting the distance of the soil body, so that the range of the telescopic section nozzle 42 is controlled to be telescopic by the radar range finder and always keep a fixed distance with the soil body, thereby achieving the best cutting effect and strictly controlling the diameter size of the enlarged bottom of the enlarged head at the bottom end of the pile.

In the embodiment of the invention, a control system 8 is further arranged, and the control system 8 is respectively and electrically connected with the water jet cutting mechanism 3, the slurry suction mechanism 5, the vertical adjusting part 7 and the beam current nozzle 4, so that the proper running speed and water pressure of the water jet cutting mechanism 3 around the annular guide rail 1 and the vertical and horizontal distances are set through the control system 8 according to the specific stratum conditions, the control and adjustment of cutting operation is realized, and the bottom expanding construction efficiency and quality are ensured.

The embodiment of the invention also provides a bottom expanding method based on the cast-in-place large-diameter tubular pile, which comprises the following steps:

a: constructing a cast-in-situ large-diameter tubular pile 2;

b: after the concrete of the pile body of the tubular pile 2 reaches a certain strength, arranging an annular guide rail 1 along the circumference of the top end of the tubular pile 2;

c: a water jet cutting mechanism 3 is arranged on the annular guide rail 1, and a right-angle telescopic beam nozzle 4 is arranged at the bottom end of the water jet cutting mechanism 3;

d: the water jet cutting mechanism 3 vertically penetrates into the enlarged head part at the bottom end of the tubular pile 2, and the beam nozzle 4 is enabled to move close to the inner side wall of the tubular pile 2 in the circumferential direction by controlling the water jet cutting mechanism 3 to rotate along the circumferential direction of the annular guide rail 1 so as to cut the soil body at the bottom end of the tubular pile 2;

e: a mud sucking mechanism 5 vertically penetrates through the tubular pile 2 to suck out the mud generated by cutting;

f: and pouring concrete to the enlarged head formed by cutting.

In the embodiment of the invention, the method further comprises the following steps: the control system 8 is configured, designed size data of the bottom end expansion head of the tubular pile 2 is input into the control system 8 in advance, and the traveling speed, cutting pressure, vertical movement and transverse expansion of the beam nozzle 4 are automatically controlled through the control system 8, so that the beam nozzle 4 and a cut soil body are always kept at a fixed distance, the corresponding cutting shape and size requirements are met, and the bottom expansion construction efficiency and quality are guaranteed.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the spirit of the present disclosure, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present description as described above, which are not provided in detail for the sake of brevity.

It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.