CN213086758U - Construction equipment for three-section type compaction threaded pile - Google Patents

Abstract

The utility model discloses a construction device of a three-section type compaction screw pile, which comprises an installation seat, a drill rod and a drill rod driving motor, wherein the drill rod is rotatably arranged on the installation seat; the drill rod driving motor is arranged on the mounting seat and connected with the drill rod so as to drive the drill rod to rotate; the bottom of drilling rod is equipped with the drill bit, and the outside of drilling rod extends along the length direction of drilling rod and is provided with the heliciform tool bit, and the articulated a plurality of tool bits that expand of installing in middle section of heliciform tool bit expand the outside that extends the heliciform tool bit when expanding the tool bit. The construction equipment of the three-section type compaction threaded pile is simple in structure and convenient to operate, and can be well suitable for forming the middle-shaped three-section type variable-cross-section compaction threaded pile of the soft foundation with weak middle bearing capacity.

Description

Construction equipment for three-section type compaction threaded pile

Technical Field

The utility model relates to a foundation stabilization construction technical field among the road bed engineering particularly, relates to a construction equipment of "well" font syllogic variable cross section compaction screw pile.

Background

The existing construction equipment for the variable cross-section compaction threaded pile realizes the change of the cross section by means of the separation of the inner drill rod and the outer drill rod of a drilling tool, and the construction process comprises the following steps: (1) pile foundation in place; (2) forming a hole at the upper section of the pile body; (3) the inner drill rod is axially separated from the outer drill rod; (4) forming a hole at the lower section of the pile body; (5) lifting and extruding to form the pile. The method has the disadvantages that the two-section type variable cross-section threaded pile with a large upper part and a small lower part can be formed, the overhanging width of the thread is not easy to change, and the applicable foundation condition is single.

China is wide in breadth and various in climate types, part of the surface of a soft soil layer is subjected to physical and chemical actions of external environments such as water evaporation, load migration, weathering erosion and the like all the year round, and in addition, the influence of historical deposition has randomness, and a multi-layer soft foundation with the soft soil layer in the middle is formed in many places of China. The distribution of the soft foundation soil layer corresponding to the pile bodies is as follows: the upper soil layer of the pile body is medium or low compressibility, the lower soil layer is medium compressibility, the bottom soil layer is low compressibility, and the middle is a high compressibility soft soil layer.

Aiming at the special soft foundation condition, although the variable cross-section threaded pile with large top and small bottom theoretically conforms to the distribution rule that the stress of the pile body is gradually reduced from the pile top to the pile bottom, the damage of the threaded pile mainly depends on the shear strength of the soil body, and at the high-compressibility soil body through which the pile body passes, even if the axial force of the pile body at the depth is not large, the pile body can be broken by shearing at first because the bearing capacity of the soil body is too small, the pile body is separated from the soil layer, the settlement is suddenly increased, and the pile body is damaged in advance when the rest of the threaded pile does not reach the limit state.

The area replacement rate of the pile-soil composite foundation is an important design parameter, and the section size (including thread width and screw diameter) of the pile body is a main factor influencing the area replacement rate. Aiming at the distribution characteristics of the soft soil layer, the soil layer with weak middle bearing capacity must adopt larger section size to ensure necessary safety, so that the replacement rate of the pile body required by the upper part, the lower part and the bottom to achieve the same bearing capacity is much lower, and at the moment, if the threaded pile with the same section or a single upper-large lower-small section is simply adopted, the problems of pile body material waste and higher manufacturing cost are caused.

In summary, the two-section type and the gradual change type variable cross-section threaded pile shapes which can be realized at present cannot meet the special foundation treatment requirement that the high-compressibility soft soil layer is positioned in the middle of the pile body.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a construction equipment of syllogic crowded close screw pile, this construction equipment simple structure, convenient operation can adapt to the stake of the crowded close screw pile of style of calligraphy syllogic variable cross section in soft foundation "that middle part bearing capacity is weak well.

In order to achieve the purpose, the utility model provides a construction equipment of a three-section type compaction screw pile, which comprises an installation seat, a drill rod and a drill rod driving motor, wherein the drill rod is rotatably arranged on the installation seat; the drill rod driving motor is arranged on the mounting seat and connected with the drill rod so as to drive the drill rod to rotate; the bottom of drilling rod is equipped with the drill bit, and the outside of drilling rod extends along the length direction of drilling rod and is provided with the heliciform tool bit, and the articulated a plurality of tool bits that expand of installing in middle section of heliciform tool bit expand the outside that extends the heliciform tool bit when expanding the tool bit.

Furthermore, the expanding cutter head is hinged on the upper surface of the middle section of the spiral cutter head, one side of the expanding cutter head on the spiral cutter head is provided with an expanding cutter head folding limiting tooth, and the other side of the expanding cutter head on the spiral cutter head is provided with an expanding cutter head unfolding limiting block; when the expanding cutter head is folded, the limiting teeth are folded close to the expanding cutter head, and the expanding cutter head is positioned in the outer contour line of the spiral cutter head; when the expanding cutter head is expanded, the expanding cutter head is expanded to a limit block close to the expanding cutter head, and the expanding cutter head extends out of the outer contour line of the spiral cutter head.

Furthermore, the expanding cutter head folding limiting tooth is of a cylindrical structure, and an arc-shaped groove matched with the expanding cutter head folding limiting tooth is formed in one side, close to the expanding cutter head folding limiting tooth, of the expanding cutter head.

Further, expand the cutter head and expand the stopper setting in the outer edge of heliciform cutter head, expand the cutter head and expand the one end that the stopper is close to the heliciform cutter head and be equipped with and expand the spacing portion of the outside contour line assorted of cutter head.

Furthermore, the reamer head is tooth-shaped, the outer side contour line of the reamer head is an arc line, and the inner side of the reamer head is provided with a cutting edge.

Furthermore, a plurality of cutter heads are evenly distributed along the circumferential direction of the spiral cutter head.

By applying the technical scheme of the utility model, a plurality of expanding cutter heads are hinged at the middle section of the spiral cutter head, and when the expanding cutter head is expanded, the expanding cutter head extends to the outer side of the spiral cutter head; after the drill rod is drilled into the soil body, the middle section of the spiral cutter head is positioned at the soft foundation with weak middle bearing capacity, the drill rod is rotated to enable the expanding cutter head to expand to extend to the outer side of the spiral cutter head, the extruding and expanding diameter of the middle section of the spiral cutter head is expanded, so that large-section extruding and expanding pore forming is carried out at the soft foundation with weak middle bearing capacity, then the expanding cutter head is folded, the drill rod is taken out from the soil body, and the three-section type variable-section extruding and compacting threaded pile in a shape like the Chinese character 'Zhong' can be formed. The construction equipment of the three-section type compaction threaded pile is simple in structure and convenient to operate, and can be well suitable for forming the middle-shaped three-section type variable-cross-section compaction threaded pile of the soft foundation with weak middle bearing capacity.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of a construction apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic view of the distribution of a plurality of reamer heads along the helical cutter head when the reamer heads are retracted.

Fig. 3 is a schematic view of the distribution of a plurality of reamer heads along the helical cutter head when the reamer heads are unfolded.

Fig. 4 is a structural schematic view of a pile-formed 'middle' -shaped three-section type compaction threaded pile.

Wherein the figures include the following reference numerals:

1. a mounting seat; 2. a drill stem; 3. a drill rod driving motor; 4. a drill bit; 5. a helical cutter head; 6. a cutter expanding head; 7. the expanding cutter head is folded with limit teeth; 8. the expanding cutter head unfolding limiting block; 61. an arc-shaped slot; 62. cutting edges; 81. a limiting part.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of the words "a" or "an" and the like in the description and claims of the present application does not denote a limitation of quantity, but rather denotes the presence of at least one. The terms "connected" and "coupled" and the like are not restricted to direct connections, but may be indirectly connected through other intermediate connections. "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 are changed accordingly.

Referring to fig. 1 to 3, a construction equipment for a three-section type compaction screw pile of the embodiment of the present invention is mainly used for forming a pile of a three-section type variable cross-section compaction screw pile in a soft foundation with weak bearing capacity in the middle. As can be seen from the figure, the construction equipment mainly comprises a mounting seat 1, a drill rod 2 and a drill rod driving motor 3. Wherein, the drill rod 2 is rotatably arranged on the mounting seat 1; the drill rod driving motor 3 is arranged on the mounting seat 1 and connected with the drill rod 2 to drive the drill rod 2 to rotate; the drill bit 4 is arranged at the bottom of the drill rod 2, the spiral cutter head 5 is arranged outside the drill rod 2, the spiral cutter head 5 extends along the length direction of the drill rod 2, a plurality of expanding cutter heads 6 are hinged to the middle section (the section A is the upper section, the section B is the middle section and the section C is the lower section) of the spiral cutter head 5, the expanding cutter heads 6 can be unfolded or folded relative to the spiral cutter head 5, and the expanding cutter heads 6 extend to the outer side of the spiral cutter head 5 when being unfolded.

According to the construction equipment for the three-section type compaction screw pile, the plurality of expanding cutter heads 6 are hinged to the middle section of the spiral cutter head 5, and the expanding cutter heads 6 extend to the outer side of the spiral cutter head 5 when being unfolded; after the drill rod 2 is drilled into the soil body, the middle section of the spiral tool bit 5 is positioned at the soft foundation with weak middle bearing capacity, the drill rod 2 is rotated to enable the expanding tool bit 6 to expand and extend to the outer side of the spiral tool bit 5, the extruding and expanding diameter of the middle section of the spiral tool bit 5 is expanded, large-section extruding and expanding pore forming is carried out at the soft foundation with weak middle bearing capacity, then the expanding tool bit 6 is folded, the drill rod 2 is taken out from the soil body, and the three-section type variable-section extruding and compacting screw pile with the shape of a Chinese character 'Zhong' can be formed. The construction equipment of the three-section type compaction threaded pile has a simple structure, is convenient to operate, and can be well suitable for forming a middle-shaped three-section type variable-cross-section compaction threaded pile (as shown in figure 4) of a soft foundation with weak middle bearing capacity.

Specifically, referring to fig. 1, 2 and 3, in the present embodiment, the reamer head 6 is hingedly mounted on the upper surface of the middle section of the helical reamer head 5; one side of the cutter expanding head 6 on the spiral cutter head 5 is provided with a cutter expanding head folding limiting tooth 7; a cutter expanding head unfolding limiting block 8 is arranged on the spiral cutter head 5 on the other side of the cutter expanding head 6; when the expanding cutter head 6 is folded, the limiting teeth 7 are folded close to the expanding cutter head, and the whole expanding cutter head 6 is positioned within the outer contour line of the spiral cutter head 5; when the cutter expanding head 6 is expanded, the cutter expanding head is close to the cutter expanding limiting block 8, and the tip of the cutter expanding head 6 extends out of the outer contour line of the spiral cutter 5. With the arrangement, when the expanded cutter head 6 needs to be folded, the drill rod 2 is rotated to enable the expanded cutter head 6 to be tightly close to the expanded cutter head folding limiting teeth 7, and the expanding range is the outer contour line of the spiral cutter head 5; when the bit expanding head 6 needs to be expanded, the drill rod 2 is rotated reversely, the bit expanding head 6 is expanded under the action of the soil body and abuts against the bit expanding limiting block 8, at the moment, the hole expanding range is the tip of the bit expanding head 6, the extruding and expanding diameter of the middle section of the spiral bit 5 is expanded, and therefore the 'middle' -shaped three-section type variable-section extruding and compacting screw pile is formed in the soil body.

Further, referring to fig. 1, fig. 2 and fig. 3, in the present embodiment, the cutter expanding head retracting limiting tooth 7 is a cylindrical structure fixedly mounted on the upper surface of the spiral cutter 5, and an arc-shaped groove 61 matched with the cutter expanding head retracting limiting tooth 7 is disposed on a side of the cutter expanding head 6 close to the cutter expanding head retracting limiting tooth 7. When the reamer head 6 is folded, the arc-shaped groove 61 on the reamer head 6 is abutted against the side surface of the reamer head folding limiting tooth 7. So set up, it is more convenient to close spacing 7 through expanding the tool bit and close 6 receipts of expanding the tool bit spacing.

Referring to fig. 1, 2 and 3, in this embodiment, the reamer head expansion limiting block 8 is disposed at the outer edge of the upper surface of the helical reamer head 5, and a limiting portion 81 matched with the outer side contour line of the reamer head 6 is disposed at one end of the reamer head expansion limiting block 8 close to the helical reamer head 5. When the reamer head 6 is expanded, the outer side of the reamer head 6 is abutted against the limiting part 81 at the end part of the reamer head expansion limiting block 8. So set up, it is more convenient to expand stopper 8 and expand spacing expanding tool bit 6 through expanding the tool bit.

Specifically, referring to fig. 2 and 3, the reamer head 6 is tooth-shaped as a whole, the outer contour line of the reamer head 6 is an arc line, and a cutting edge 62 is provided on the inner side of the reamer head 6. Set up like this, more conveniently receive and close and expand expanding the tool bit 6, also more conveniently crowd the expansion through expanding tool bit 6 to the soil body, form the crowded stake hole that expands of large cross-section in middle section.

In this embodiment, the plurality of reamer bits 6 are provided on the upper surface of the helical bit 5 at intervals along the middle section of the helical bit 5, and the plurality of reamer bits 6 are evenly provided along the circumferential direction of the helical bit 5. The arrangement is more favorable for improving the large-section extruding and expanding pore-forming of the soft foundation in the middle of the soil body.

The operation method for forming the 'middle' -shaped three-section type compaction threaded pile by using the construction equipment comprises the following steps: the drill rod driving motor 3 drives the drill rod 2 to rotate forwards, and meanwhile, the drill rod 2 is pressed downwards, and the reamer head 6 is in a folding and rotating state; when the middle section of the spiral tool bit 5 is positioned at the soft foundation at the middle part of the soil body, the drill rod 2 is driven to rotate reversely by the drill rod driving motor 3, the expanding tool bit 6 is opened to be in an expanded state, and large-section expanding pore forming is carried out on the middle soft foundation; after the hole forming of the middle soft foundation is finished, the drill rod 2 is rotated in the forward direction, and the cutter expanding head 6 is in a folding state; and lifting the drill rod 2 upwards to complete the pile forming of the 'middle' -shaped three-section type compaction threaded pile.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The construction equipment for the three-section type compaction threaded pile is characterized by comprising an installation base (1), a drill rod (2) and a drill rod driving motor (3), wherein the drill rod (2) is rotatably installed on the installation base (1); the drill rod driving motor (3) is installed on the installation seat (1) and connected with the drill rod (2) to drive the drill rod (2) to rotate; the bottom of drilling rod (2) is equipped with drill bit (4), the outside of drilling rod (2) is followed the length direction of drilling rod (2) extends and is provided with heliciform tool bit (5), the middle section of heliciform tool bit (5) is articulated to be installed a plurality of tool bits (6) that expand, expand when tool bit (6) expand extend the outside of heliciform tool bit (5).

2. The construction equipment for the three-section type compaction screw pile is characterized in that the expanding cutter head (6) is hinged to the upper surface of the middle section of the spiral cutter head (5), one side of the expanding cutter head (6) on the spiral cutter head (5) is provided with an expanding cutter head folding limiting tooth (7), and the other side of the expanding cutter head (6) on the spiral cutter head (5) is provided with an expanding cutter head unfolding limiting block (8); when the expanded cutter head (6) is folded, the expanded cutter head is tightly close to the expanded cutter head folding limiting teeth (7), and the expanded cutter head (6) is positioned within the outer contour line of the spiral cutter head (5); when the expanding cutter head (6) is expanded, the expanding cutter head is close to the expanding cutter head expansion limiting block (8), and the expanding cutter head (6) extends out of the outer contour line of the spiral cutter head (5).

3. The construction equipment for the three-section type compaction screw pile is characterized in that the expanded tool bit folding limiting tooth (7) is of a cylindrical structure, and an arc-shaped groove (61) matched with the expanded tool bit folding limiting tooth (7) is formed in one side, close to the expanded tool bit folding limiting tooth (7), of the expanded tool bit (6).

4. The construction equipment for the three-section type compaction threaded pile according to claim 2, wherein the expanded cutter head unfolding limiting block (8) is arranged at the outer edge of the spiral cutter head (5), and a limiting part (81) matched with the outer side contour line of the expanded cutter head (6) is arranged at one end, close to the spiral cutter head (5), of the expanded cutter head unfolding limiting block (8).

5. The construction equipment for the three-section type compaction threaded pile is characterized in that the expanding tool bit (6) is in a tooth shape, the outer side contour line of the expanding tool bit (6) is an arc line, and a cutting edge (62) is arranged on the inner side of the expanding tool bit (6).

6. The construction equipment for the three-section type compaction threaded pile according to any one of claims 1 to 5, wherein a plurality of the expanding cutter heads (6) are uniformly distributed along the circumference of the spiral cutter head (5).

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