阅读说明：本技术 一种扩大头施工装置 (Enlarged footing construction equipment ) 是由 吕成炜 周阳 王春 刘贵强 吴斌 胡延武 吕晓光 陈翀 高小平 王左 李慧玲 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种扩大头施工装置,涉及一种施工设备,包括竖向管和多个钢丝绳,所述竖向管的底端连接有底端为水平状态的导向管,且在外力驱动的条件下设于所述导向管内的钢丝绳底端可由竖直向下的状态变为水平状态并被导出所述导向管,所述竖向管的上方还设置有底端与处于其内的钢丝绳顶端活动连接的驱动杆,所述驱动杆的顶端与可驱动其旋转下行的驱动装置连接,所述竖向管的长度不小于所述钢丝绳的长度；所述钢丝绳的外径不小于3cm；所述导向管底端外壁上还安装有与外部注浆装置连接的注浆嘴；本实施例中能够有效形状桩底横梁,多个横梁组合后形成抗拔扩大头结构,相比传统扩大头尺寸能显著增长,抗拔效果更佳。(The invention discloses an enlarged footing construction device, which relates to construction equipment and comprises a vertical pipe and a plurality of steel wire ropes, wherein the bottom end of the vertical pipe is connected with a guide pipe of which the bottom end is in a horizontal state, the bottom end of each steel wire rope arranged in the guide pipe can be changed from a vertical downward state into a horizontal state under the condition of external force driving and is led out of the guide pipe, a driving rod of which the bottom end is movably connected with the top end of the steel wire rope in the vertical pipe is also arranged above the vertical pipe, the top end of the driving rod is connected with a driving device capable of driving the driving rod to rotate downwards, and the length of the vertical pipe is not less than that of the steel wire rope; the outer diameter of the steel wire rope is not less than 3 cm; the outer wall of the bottom end of the guide pipe is also provided with a grouting nozzle connected with an external grouting device; can effective shape stake bottom crossbeam in this embodiment, form resistance to plucking enlarged head structure after a plurality of crossbeams make up, compare traditional enlarged head size and can show the growth, resistance to plucking effect is better.)

1. The enlarged footing construction device is characterized by comprising a vertical pipe (1) and a plurality of steel wire ropes (2), wherein the bottom end of the vertical pipe (1) is connected with a guide pipe (3) with the bottom end in a horizontal state, the bottom end of each steel wire rope (2) arranged in the guide pipe (3) can be changed from a vertically downward state into a horizontal state under the condition of external force driving and is led out of the guide pipe (3), a driving rod (4) with the bottom end movably connected with the top end of the steel wire rope (2) in the vertical pipe (1) is further arranged above the vertical pipe (1), the top end of the driving rod (4) is connected with a driving device (5) capable of driving the driving rod to rotate downwards, and the length of the vertical pipe (1) is not less than that of the steel wire rope (2); the outer diameter of the steel wire rope (2) is not less than 3 cm; and a grouting nozzle (6) connected with an external grouting device (7) is further mounted on the outer wall of the bottom end of the guide pipe (3).

2. The enlarged footing construction device of claim 1, wherein the grouting nozzle (6) is replaced by a grouting pipe (8) which is sleeved outside the bottom end of the guide pipe (3) and coaxially distributed with the guide pipe, an annular grouting space (9) which is connected with an external grouting device (7) through a pipeline is arranged in the grouting pipe (8), a plurality of grouting holes (10) which are uniformly distributed around the axis of the grouting pipe (8) and communicated with the grouting space (9) are formed in the side wall of the grouting pipe (8) close to the bottom end of the guide pipe (3), and the grouting direction of each grouting hole (10) is the same as the guiding direction of the steel wire rope (2) in the guide pipe (3).

3. The enlarged footing construction device of claim 1 or 2, further comprising a multi-section driving member (11) having a bottom end movably connected to the top end of the wire rope (2) and a top end movably connected to the bottom end of the driving rod (4) and having the same length as the guiding pipe (3), wherein the length of the vertical pipe (1) is not less than the sum of the lengths of the wire rope (2) and the multi-section driving member (11).

4. An enlarged head construction device according to claim 3, wherein a plurality of elongated burrs (12) are installed on the wire rope (2), and an outer end of each of the burrs (12) is inclined toward a tip end of the corresponding wire rope (2).

5. An enlarged footing working device as claimed in claim 4, wherein said vertical pipe (1) has a plurality of wall means uniformly mounted on its outer wall around its axis.

6. The enlarged footing construction device of claim 5, wherein the retractable support wall device is specifically composed of an electric diamond-shaped retractable frame (13) and a support plate (14), the fixed end of the electric diamond-shaped retractable frame (13) is fixedly connected with the outer wall of the vertical pipe (1), and the vertically arranged support plate (14) is fixedly mounted on the retractable end.

7. The enlarged footing construction device of claim 6, wherein the top end of the steel wire rope (2) is fixedly provided with a connecting piece (15) with a square cross section at the top end, the bottom of the driving rod (4) is provided with an embedding groove (16) for inserting the top end of the connecting piece (15), and the bottom end of the steel wire rope (2) is fixedly provided with a drill bit (17).

8. An enlarged footing working apparatus as claimed in any one of claims 5 to 7, wherein the bottom end of said guide tube (3) is inclined upwardly.

9. The enlarged footing construction device of claim 8, wherein said driving device (5) can make the driving rod (4) rotate forward and backward, and said vertical pipe (1) is formed by splicing a plurality of connecting pipes.

10. An enlarged footing working apparatus as claimed in claim 9, wherein one of said plurality of said wall means is located directly above the bottom end of said guide tube (3) and has an indicator light (18) mounted on the top thereof.

Technical Field

The invention relates to construction equipment, in particular to equipment for constructing a pile bottom enlarged head.

Background

The traditional pile bottom expanding head is mainly used for resisting pulling, and the diameter of the traditional pile bottom expanding head is drawn at the bottom of a pile through telescopic equipment and the like, so that an expanding head structure with the bottom outer diameter larger than that of an upper pile body is formed, and a pulling resisting effect is formed.

However, the traditional enlarged footing construction equipment is large in size and not beneficial to construction of small-bore piles, and on the other hand, the telescopic equipment is mostly in rotary construction when being positioned at the pile bottom, so that the shearing strength required on construction equipment materials is high, and the difficulty in manufacturing the equipment is high; secondly, the formed enlarged head is cylindrical, and the size of the formed enlarged head is only slightly larger than that of the pile body, so that the uplift resistance effect is poor.

Therefore, it is desirable to provide an enlarged head construction device which is low in manufacturing cost, applicable to a small bore diameter, and excellent in uplift resistance.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a construction device for an enlarged head, which aims to solve the technical problems that the construction cost of the enlarged head is high and the enlarged head is not suitable for small aperture in the prior art.

The invention is realized by the following technical scheme:

the bottom end of the vertical pipe is connected with a guide pipe with the bottom end in a horizontal state, the bottom end of a steel wire rope arranged in the guide pipe can be changed from a vertically downward state to a horizontal state under the condition of external force driving and is led out of the guide pipe, a driving rod with the bottom end movably connected with the top end of the steel wire rope in the vertical pipe is further arranged above the vertical pipe, the top end of the driving rod is connected with a driving device capable of driving the driving rod to rotate downwards, and the length of the vertical pipe is not less than that of the steel wire rope; the outer diameter of the steel wire rope is not less than 3 cm; and a grouting nozzle connected with an external grouting device is further installed on the outer wall of the bottom end of the guide pipe.

Further, the grouting nozzle is replaced by a grouting pipe which is sleeved outside the bottom end of the guide pipe and coaxially distributed with the guide pipe, an annular grouting space which is connected with an external grouting device through a pipeline is arranged in the grouting pipe, a plurality of grouting holes which are uniformly distributed around the axis of the grouting pipe and communicated with the grouting space are formed in the side wall, close to the bottom end of the guide pipe, of the grouting pipe, and the grouting direction of each grouting hole is the same as the guiding direction of the steel wire rope in the guide pipe.

And the length of the vertical pipe is not less than the sum of the lengths of the steel wire rope and the multi-section driving piece.

Further, a plurality of long strip-shaped burrs are installed on the steel wire rope, and the outer end of each burr inclines towards the top end of the corresponding steel wire rope.

Furthermore, a plurality of telescopic wall supporting devices are uniformly arranged on the outer wall of the vertical pipe around the shaft of the vertical pipe.

Further, flexible wall device that props specifically comprises electronic rhombus expansion bracket and fagging, the stiff end of electronic rhombus expansion bracket and the outer wall fixed connection of vertical pipe and flexible serve then fixed mounting have the fagging of vertical setting.

Further, the top end of the steel wire rope is fixedly provided with a connecting piece with a square cross section at the top end, the bottom of the driving rod is provided with an embedded groove for inserting the top end of the connecting piece, and the bottom end of the steel wire rope is fixedly provided with a drill bit.

Further, the bottom end of the guide tube is inclined upwards.

Furthermore, the driving device can drive the driving rod to rotate positively and negatively, and the vertical pipe is formed by splicing a plurality of sections of connecting pipes.

Further, one of the telescopic supporting wall devices is positioned right above the bottom end of the guide pipe, and an identification lamp is installed at the top of the guide pipe.

Compared with the prior art, the invention has the following advantages:

the enlarged head construction device provided by the invention can effectively realize the preparation of the enlarged head with small aperture, and meanwhile, the manufacturing cost of equipment is low; the defect that the expansion head is formed by the rotation of the traditional telescopic equipment is avoided; the bottom beam structure can be formed, and the anti-pulling effect is good.

Drawings

Fig. 1 is a schematic structural view of an enlarged footing construction apparatus provided in embodiment 1;

fig. 2 is a schematic structural view of an enlarged footing construction apparatus provided in embodiment 2.

In the figure: 1. a vertical tube; 2. a wire rope; 3. a guide tube; 4. a drive rod; 5. a drive device; 6. a grouting nozzle; 7. an external grouting device; 8. a grouting pipe; 9. grouting space; 10. grouting holes; 11. a multi-linked driving member; 12. deburring; 13. an electric diamond expansion bracket; 14. a supporting plate; 15. a connecting member; 16. an embedding groove; 17. a drill bit; 18. and an identification lamp.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Examples

With reference to fig. 1, the embodiment provides an enlarged footing construction device, which includes a vertical pipe 1 and a plurality of steel wire ropes 2, wherein the bottom of the vertical pipe 1 is connected to a guide pipe 3 whose bottom end is in a horizontal state, the steel wire ropes 2 can be placed in the guide pipe 3, and when the steel wire ropes 2 in the guide pipe 3 are driven by external force, the bottom ends of the steel wire ropes 2 can be changed from a vertical state to a horizontal state and are horizontally led out from the bottom ends of the guide pipe 3; with reference to the attached drawings, in the embodiment, the vertical pipe 1 and the guide pipe 3 form an arc structure with a horizontal bottom end, and when the steel wire rope 2 is thick and hard, the vertical pipe 1 and the guide pipe 3 form a fishhook-shaped structure with a horizontal bottom end; secondly, in order to facilitate the driving of the steel wire rope 2 which is positioned in the whole body and is formed by the vertical pipe 1 and the guide pipe 3, in the embodiment, the top end of the steel wire rope 2 is movably connected with the driving rod 4 which is positioned right above the steel wire rope, the top end of the driving rod 4 is connected with the driving device 5 which can drive the driving rod 4 to rotate downwards, and meanwhile, the driving device 5 can realize the forward and reverse rotation of the driving rod 4; in order to facilitate installation and driving of the vertical pipe 1 and the guide pipe 3 to form the steel wire rope 2 in the whole body, the length of the vertical pipe 1 is not smaller than that of the steel wire rope 2, so that the steel wire rope 2 can be placed conveniently, the defect that the steel wire rope is placed into the guide pipe 3 manually is avoided, meanwhile, the driving rod 4 is convenient to drive the steel wire rope 2 by opening the top of the vertical pipe 1, and in order to facilitate the steel wire rope 2 to form a beam pile structure, certain rigidity is required, so that the outer diameter of the steel wire rope is not smaller than 3cm in the embodiment; and a grouting nozzle 6 connected with an external grouting device 7 is further installed on the outer wall of the bottom end of the guide pipe 3.

Specifically, the operating principle of the enlarged footing construction apparatus provided in this embodiment is: firstly, fixedly installing the guide pipe 3 and the vertical pipe 1 which are integrally detachable at the bottom of the precast pile or the bottom of the precast hole, wherein the upper edge of the bottom end of the guide pipe 3 is positioned below the bottom of the precast pile or below the bottom of the precast hole, and keeping the bottom end of the guide pipe 3 in a horizontal state, after the fixed installation is finished, arranging a driving device 5 and an external grouting device 7, putting a steel wire rope 2 into the vertical pipe 1, inserting the bottom end of a driving rod 4 connected with the driving device 5 into the vertical pipe 1 to be movably connected with the top end of the steel wire rope 2, then starting the driving device 5, enabling the driving rod 4 to rotate forwards and downwards, namely the rotating direction of the driving rod 4 is the same as the screwing direction of the steel wire rope 2, further driving the top end of the steel wire rope 2 in the vertical pipe 1 to rotate, synchronously enabling the top end of the steel wire rope 2 to move downwards when the driving rod 4 moves downwards, further extruding the main body of the steel wire rope 2 to rotate and twist downwards, finally, the bottom end of the steel wire rope 2 is led out from the bottom end of the guide pipe 3, the bottom end of the steel wire rope 2 is changed from a vertical downward state to a horizontal state in the process, then the top end of the steel wire rope 2 is continuously rotated downwards, so that the bottom end of the steel wire rope 2 rotates and advances towards the radial outer side of the bottom of the precast pile or the precast hole, the bottom end of the steel wire rope 2 drills the soil body in front of the steel wire rope 2 until the drilling length reaches a target length, and at the moment, the top end of the steel wire rope 2 and the bottom end of the driving rod 4 are both leveled with the top end of the guide pipe 3; in the process, the external grouting device 7 continuously supplies grout to the grouting nozzle 6, the grout sprayed out from the grouting nozzle 6 assists in cutting the soil body in front of the rotary drill of the steel wire rope 2, thereby facilitating the forward drilling of the bottom end of the steel wire rope 2, enabling the driving rod 4 to rotate reversely for a period of time after the forward drilling of the bottom end of the steel wire rope 2 reaches the target length, i.e., the driving rod 4 is rotated in the direction opposite to the tightening direction of the wire rope 2, so that the portion thereof protruding out of the guide tube 3 is loosened and screwed, so as to expand the hole, after the reverse rotation is finished, the steel wire rope 2 is rotated forward for a period of time to be changed into a normal length after being rotated, then when the slurry sprayed out from the grouting nozzle 6 is solidified, the vertical pipe 1 and the guide pipe 3 are integrally disassembled, the remaining part of the steel wire rope 2 remaining in the guide pipe 3 is led out, then, the next steel wire rope 2 is constructed, and the constructed steel wire rope and the concrete externally solidified can form a bottom beam structure; referring to fig. 1, the bottom on the right side in the figure is a bottom beam structure formed when the steel wire rope 2 rotates forwards first, then rotates backwards to ream, and then rotates forwards to return to normal.

Secondly, the part of the steel wire rope 2 which is not extended out of the precast pile or the precast hole is buried in the pouring body when the precast pile or the precast hole bottom is poured in the later period, so that the part of the steel wire rope 2 which is not extended out of the precast pile or the precast hole is connected with the beam formed after grouting solidification and the main body in the precast pile or the precast hole into a whole, after a plurality of steel wire ropes 2 are constructed, an open umbrella-shaped structure can be formed at the bottom of the precast pile or the precast hole, the steel wire rope 2 and the external solidified concrete are equivalent to umbrella ribs, the purpose of forming the transverse anti-pulling and large-expansion head at the bottom is achieved, the radiation length of the steel wire rope 2 is large, and the defect that the size is limited when the traditional expansion head is formed is avoided.

Particularly, during construction, the bottom end of the steel wire rope 2 can be rotated forwards to a target length and reversely reamed, and then the steel wire rope 2 does not rotate forwards, namely, the exposed length of the steel wire rope 2 after reversely reaming is the real target length, so that the solidified concrete is fully connected with the loose steel wire rope 2, and the purpose of improving the uplift pile strength is achieved.

Particularly, in order to further enhance the strength of each steel wire rope 2 forming the uplift pile, in this embodiment, each steel wire rope 2 is further provided with a plurality of strip-shaped burrs 12, and the outer end of each burr 12 inclines towards the top end direction of the corresponding steel wire rope 2, so that on one hand, the strength of the uplift pile can be enhanced, and on the other hand, soil can be cut in an auxiliary manner in the rotation process; the outer end of each burr 12 is inclined towards the top end of the corresponding steel wire rope 2, so that the burrs can rotate downwards to be discharged when being positioned in the guide pipe 3.

In particular, in order to further improve the efficiency of forward rotation of the bottom end of the steel wire rope 2 and the stability of forward rotary drilling, in this embodiment, the drill bit 17 is installed at the bottom end of the steel wire rope 2, and the screwing direction of the drill bit 17 is the same as the screwing direction of the corresponding steel wire rope 2, so that when the steel wire rope 2 is turning to the forward rotary drilling, the drill bit 17 can effectively screw into the soil in front of the drill bit 17 and conduct wires to the bottom end of the steel wire rope 2, and the screwing efficiency and accuracy can be effectively improved.

Particularly, in order to facilitate the forward and backward rotation and downward movement of the whole steel wire rope 2, in this embodiment, the top end of the steel wire rope 2 is provided with the connecting member 15 having a square top cross section, and the bottom end of the driving rod 4 is provided with the embedding groove 16 into which the top end of the connecting member 15 is inserted, so that when the steel wire rope 2 is driven, the top end of the connecting member 15 is inserted into the embedding groove 16 and then moves downward, thereby facilitating the driving of the top end of the steel wire rope 2.

Example 2

In order to further increase the construction efficiency of the head, in the present embodiment, the apparatus provided in embodiment 1 is further improved, and the improved technical features include:

A. replace slip casting mouth 6 for establish the slip casting pipe 8 of establishing at 3 bottom outer walls of stand pipe and with 3 coaxial distributions of stand pipe, the two fixed connection, be provided with the annular slip casting space 9 that passes through the pipe connection with outside slip casting device 7 in slip casting pipe 8 simultaneously, evenly set up a plurality of slip casting holes 10 that distribute around 8 axes of slip casting pipe and communicate with slip casting space 9 on the lateral wall in the slip casting pipe 8 outside towards the stand pipe 3, thereby avoid the defect of single slip casting mouth 6 independent whitewashing, a plurality of slip casting holes 10 encircle stand pipe 3 and wire rope 2, carry out the uniform cut to the soil body in wire rope 2 the place ahead, wire rope 2's efficiency that gos forward has further been improved.

B. In order to avoid the need of completely disassembling and assembling the vertical pipe 1 and the guide pipe 3 to lead out the part of the steel wire rope 2 which is remained in the vertical pipe, in the embodiment, a multi-section driving piece 11 is further arranged, the bottom end of the multi-section driving piece is movably connected with the top end of the steel wire rope 2, the top end of the multi-section driving piece is movably connected with the driving rod 4, the length of the multi-section driving piece is the same as that of the guide pipe 3, the multi-section driving piece 11 is in a multi-section shape, specifically, the multi-section driving piece is formed by a plurality of driving blocks, adjacent driving blocks are hinged and connected, so that the multi-section driving piece is convenient to rotate and bend and deform, further, the multi-section driving piece 11 can change the integral shape due to the shape of the guide pipe 3 in the guide pipe 3, so that the steel wire rope 2 can be driven to go down continuously after the multi-section driving piece 11 is pressed down from the top end to the top end of the guide pipe 3, the bottom end of the multi-section driving piece 11 is flush with the guide pipe 3, and the multi-section driving piece changes the integral shape gradually along with the down in the process, therefore, the steel wire rope 2 in the guide pipe 3 can be squeezed and finally completely led out of the guide pipe 3, the aim of discharging and retaining the steel wire rope 2 is fulfilled, and the defect that the steel wire rope needs to be disassembled and assembled in the embodiment 1 is overcome;

particularly, in order to facilitate driving the steel wire rope 2 and the multi-section driving member 11 to rotate downward, in this embodiment, the length of the vertical pipe 1 is not less than the sum of the lengths of the steel wire rope 2 and the multi-section driving member 11, and further initially, the bottom end of the steel wire rope 2 is located at the top end of the guide pipe 3, the multi-section driving member 11 is located above the steel wire rope 2, the multi-section driving member 11 and the steel wire rope 2 are both located in the vertical pipe 1, after the driving rod 4 is connected to the top end of the multi-section connecting member 15 through the top end of the vertical pipe 1, the multi-section driving member 11 is extruded to rotate downward under the guidance of the vertical pipe 1, so that the steel wire rope 2 rotates downward, and until the top end of the multi-section driving member 11 flushes with the top end of the guide pipe 3, the steel wire rope 2 can be completely discharged out of the guide pipe 3.

C. In order to facilitate the later-stage rotation of the whole formed by the guide pipe 3 and the vertical pipe 1 so as to construct other steel wire ropes 2, in the embodiment, a plurality of telescopic wall supporting devices are uniformly arranged on the outer side of the vertical pipe 1 around a shaft, and can stabilize the vertical pipe 1 through telescopic to stabilize the construction process of the enlarged head;

particularly, in this embodiment, the telescopic wall supporting device is specifically composed of an electric diamond-shaped telescopic frame 13 and a supporting plate 14, a fixed end of the electric diamond-shaped telescopic frame 13 is fixedly connected with the outer wall of the vertical pipe 1, and the supporting plate 14 is fixedly installed on the telescopic end, so that the supporting plate 14 can extend out to be supported on the inner wall of the precast pile or the inner wall of the precast hole when the electric diamond-shaped telescopic frame 13 works, and the vertical pipe 1 can be effectively fixed after the supporting plates 14 are matched, thereby achieving the purpose of quick assembly and disassembly;

in particular, in order to distinguish the direction of the bottom end of the guide tube 3, in the present embodiment, one of the plurality of wall units is disposed directly above the bottom end of the guide tube 3, and an identification lamp 18 is installed on the top of the wall unit, so that the operator can easily identify the direction of the bottom end of the guide tube 3.

D. In order to further enhance the pulling resistance of the enlarged head, in the embodiment, the bottom end of the guide tube 3 is arranged to be inclined upwards, so that the enlarged head with an inverted umbrella-shaped structure is finally formed, and the pulling resistance of the finally formed enlarged head can be further improved;

particularly, the construction quantity of the steel wire ropes 2 can be at least two according to the requirement, and when the two steel wire ropes are two, the directions of the two steel wire ropes 2 are opposite, so that a beam anti-pulling structure can be formed; when the number of the grooves is at least three, an inverted umbrella-shaped structure can be formed.

In particular, in order to avoid the overlong vertical pipe 1, in this embodiment, the vertical pipe 1 is formed by splicing a plurality of sections of connecting pipes, so that the installation of the device is facilitated.

With reference to fig. 2, the bottom beam formed at the lower right corner in the drawing is a bottom beam structure formed by forward rotating and then reverse rotating the steel wire rope 2 without returning, and a complete enlarged head is formed by forming a plurality of prefabricated holes or a radial bottom beam structure of the prefabricated pile, so that the uplift resistance effect of the formed pile can be effectively improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.