CN107059861B - Disk forming tool and multi-disk soil anchor prepared by using same - Google Patents
Disk forming tool and multi-disk soil anchor prepared by using same Download PDFInfo
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- CN107059861B CN107059861B CN201710407904.XA CN201710407904A CN107059861B CN 107059861 B CN107059861 B CN 107059861B CN 201710407904 A CN201710407904 A CN 201710407904A CN 107059861 B CN107059861 B CN 107059861B
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- air bag
- pressing plate
- lining pipe
- disc
- diameter
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
Abstract
The application provides a dishing tool and a multi-dished soil anchor prepared by the dishing tool, wherein the dishing tool comprises a lining pipe which is arranged at the innermost layer of the dishing tool and plays a role in supporting the dishing tool; the air bag is sleeved on the outer layer of the lining pipe and has elasticity, and the air bag stretches radially along the diameter of the lining pipe; the pressing plate is arranged on the outer surface of the air bag, a bump is arranged on the pressing plate, and the pressing plate radially moves along with radial expansion and contraction of the air bag along the diameter of the lining pipe. The multi-disc soil anchor comprises a cylinder and a plurality of discs which are arranged on the outer surface of the cylinder in a ring-shaped way at intervals. The tray forming tool provided by the application adopts the air bag to inflate and push the pressing plate to expand radially, the convex blocks on the surface of the pressing plate are pressed into the soil of the drilled hole, a plurality of tray cavities are formed through operations such as inflation and deflation, rotation, stretching and the like, cement slurry is poured into the expanded drilled hole, the cement slurry is solidified into tray bodies, and the soil facing surface of each tray body is under the pressure of passive soil, so that higher anchoring force can be finally obtained.
Description
Technical Field
The application relates to the field of soil layer anchor cable anchoring, in particular to a disc forming tool and a multi-disc soil anchor prepared by the disc forming tool.
Background
The soil anchor is widely applied to foundation pit support, slope treatment and other projects. In the prior art, the construction of the soil layer anchor cable is generally carried out by firstly drilling Kong Zai into steel strands or screw steel, then pouring cement paste, and tensioning the steel strands or screw steel after the cement paste is solidified. To obtain a larger anchoring force, it is generally selected to increase the anchoring diameter or increase the anchoring length, but increasing the anchoring diameter causes a sharp increase in the amount of cement paste to cause a cost increase, while the increase in the length of the anchoring section is limited.
When the existing cement slurry pouring soil anchor works, the outer surface is subjected to the action of frictional resistance and cohesive force, and the pulling resistance is small, so that an enlarged head soil anchor is generated, the earth facing surface of the enlarged head soil anchor is subjected to the action of passive soil pressure, and the larger the earth facing area, the larger the anchoring force is; however, the enlarged head cavity has a complicated forming process, and a large amount of cement slurry is consumed in practical application, so that the enlarged head cavity has poor economical efficiency and is not suitable for wide application.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The application adopts a disc forming tool with simple structure and easy realization to form a plurality of disc bodies on the surface of the soil anchor, and aims to utilize the characteristic that the multi-disc soil facing surface is acted by passive soil pressure, and the accumulated area of the multi-disc soil facing surface is larger, so that higher anchoring force is obtained, and the increase of cement slurry increment of the disc is less, so that the application is economical and applicable.
In order to achieve the above object, the present application provides the following technical solutions: a palletizing tool, comprising: a lining pipe arranged at the innermost layer of the tray forming tool and used for supporting the tray forming tool; the air bag is sleeved on the outer layer of the lining pipe and has elasticity, and the air bag stretches radially along the diameter of the lining pipe; the pressing plate is arranged on the outer surface of the air bag, a protruding block is arranged on the pressing plate, and the pressing plate radially moves along with radial expansion and contraction of the air bag along the diameter of the lining pipe.
In the above-mentioned tray forming tool, preferably, the lining pipe is a hollow cylinder with both ends sealed and air inlets on the surface; the lining pipe is characterized in that a bearing push-pull part is fixedly arranged at one sealing end of the lining pipe, an air inlet nipple is further arranged at one sealing end, the air inlet nipple and the push-pull part are positioned at the same end part and are consistent in the outward extending direction of the two parts, one end of the air inlet nipple is fixedly communicated with the lining pipe, and an external air source enters the inside of the lining pipe through the other end of the air inlet nipple.
In a palletizing tool as described above, preferably, the air bag is wrapped around the periphery of the inner liner tube, and both ends of the air bag and the inner liner tube are fixedly sealed by mechanical seal fixtures.
In a dishing tool as described above, the plurality of air inlet holes are preferably distributed in a uniform or non-uniform pattern over the surface of the liner tube.
In one of the above-mentioned tray forming tools, preferably, the pressing plate is an arc-shaped thin plate, the inner surface of the pressing plate is attached to the air bag, and the outer surface of the pressing plate is provided with a bump; the number of the convex blocks is a plurality, and the convex blocks are oppositely arranged, spaced or staggered on the pressing plate; the number of the pressing plates is 2-6, and the pressing plates are arranged on the outer surface of the air bag in a surrounding mode.
In one of the above-mentioned disc forming tools, preferably, an annular elastic member is disposed at the periphery of the pressing plate, and the number of annular elastic members is plural and distributed between the plural bumps along the pressing plate axial direction.
In the above-mentioned disc forming tool, preferably, the two ends fixed by the mechanical seal fixing piece are provided with limiting rings, the limiting rings are cylinders with end faces with middle holes at one ends, the end faces and one end of the limiting rings form steps, and the diameter of the holes of the end faces is equal to the diameter of the air bag when the air bag is sleeved outside the lining pipe and is not inflated; the diameter of the limiting ring is larger than or equal to the outer diameter of the protruding block attached to the pressing plate on the outer surface of the air bag when the air bag is not inflated.
In a dishing tool as described above, preferably the length of the platen is shorter than the length of the liner tube; the two ends of the pressing plate are clamped in steps formed by one end of the limiting ring and the end face; when the air bag is inflated, the outer surface of the pressing plate is attached to the inner surface of the step.
In a disc forming tool as described above, preferably, the outer diameter of the stop collar is smaller than the diameter of the drill hole, a gap exists between the inner surface of the stop collar and the outer surface of the air bag, and the gap is filled with a curing material.
A multi-disc earth anchor prepared using the disc forming tool, the multi-disc earth anchor comprising: the steel strand or the deformed steel bar extends out of one end of the cylinder, and the extended part is connected with an external force application object; the disc bodies are arranged on the outer surface of the cylinder in a surrounding mode at intervals; the cylinder is obtained by curing cement paste or cement mortar, the length of the cylinder is not more than the depth of a drilled hole, and the diameter of the cylinder is equal to the diameter of the drilled hole; the tray body and the cylinder are integrally formed by solidifying cement paste or cement mortar, and the tray body is a full tray or a non-full tray.
Analysis shows that compared with the prior art, the application has the following advantages:
1. the multi-disc soil anchor adopts the multi-disc to improve the anchoring force, and the application can correspondingly shorten the anchoring length under the condition of equal required anchoring force, thereby reducing the drilling length, the steel strand length and the consumption of cement paste, greatly reducing the anchoring cost, and being economical and applicable.
2. The multi-disc soil anchor provided by the application takes a disc forming tool as a mould, the disc forming tool adopts air bag inflation to push a pressing plate to radially expand, bumps on the surface of the pressing plate are pressed into the soil of a drill hole, a plurality of disc cavities are formed through operations such as inflation and deflation, rotation, stretching and the like, cement paste or cement mortar is poured into the expanded drill hole, the cement paste or cement mortar is solidified into disc bodies, and the soil facing surface of each disc body is acted by passive soil pressure, so that higher anchoring force can be finally obtained.
3. The multi-disc soil anchor provided by the application takes the disc forming tool as a mould, the disc forming tool is light in weight, the air bag is small in inflation pressure, the air inlet and exhaust speed is high, the operation is safe and easy, and the construction speed is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. Wherein:
FIG. 1 is a schematic view of the lining pipe structure of the palletizing tool according to the present application.
FIG. 2 is a schematic diagram of the balloon structure of the palletizing tool according to the present application.
FIG. 3 is a schematic view of the platen structure of the tray forming tool of the present application.
FIG. 4 is a schematic diagram of a stop collar of a palletizing tool according to the present application.
Fig. 5 is an assembled view of the tray forming tool of the present application.
FIG. 6 is a cross-sectional view of an end portion of the palletizing tool of the present application as it is inflated.
Fig. 7 is a schematic structural view of a multi-disc soil anchor according to an embodiment of the present application.
Reference numerals illustrate: 1-a disc body, 2-a cylinder, 3-a steel strand, 4-a pull rod and 5-an air inlet nipple,
6-air inlet holes, 7-lining pipes, 8-air bags, 9-clamping hoops, 10-convex blocks, 11-pressing plates, 12-limiting rings, 13-elastic telescopic strips and 14-solidifying materials.
Detailed Description
The application will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the application and not limitation of the application. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present application encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.
In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present application and do not require that the present application must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "coupled" and "connected" as used herein are to be interpreted broadly, and may be, for example, connected or detachably connected; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
As shown in fig. 1 to 7, the application provides a disc forming tool and a multi-disc soil anchor manufactured by the disc forming tool, wherein the multi-disc soil anchor comprises a plurality of disc cavities and drilled holes, a cylinder 2 is formed after cement slurry or cement slurry is poured into the disc cavities and drilled holes, a plurality of disc bodies are positioned on the outer surface of the cylinder 2 and form a whole with the cylinder 2, the disc body 1 is divided into a whole disc, a half disc, a quarter disc and the like, and the cross section of the disc is in a trapezoid shape, a semicircular shape and the like. The coiling tool comprises a lining tube 7, an air bag 8, a pressing plate 11, elastic telescopic strips 13, a lug 10 and a limiting ring 12, wherein the air bag 8 is sleeved on the outer surface of the lining tube 7, and the air bag 8 and the two ends of the lining tube 7 are fixedly sealed through mechanical sealing fixing pieces. The two ends of the lining tube 7 are closed, the surface of the lining tube is provided with a plurality of air inlet holes 6, and one closed end is provided with a pull rod 4 with a push-pull function and an air inlet nipple 5. The mechanical seal holder in this embodiment is preferably a clip 9. The clamp 9 is used for hooping and sealing the air bag 8 and the lining pipe 7, a plurality of strip pressing plates 11 are arranged on the outer surface of the air bag 8, protruding blocks 10 are oppositely arranged on the surfaces of the pressing plates 11, the protruding blocks 10 are distributed at intervals or in a staggered mode, annular elastic pieces are wound on the outer surfaces of the pressing plates 11, the annular elastic pieces are elastic telescopic strips 13 in the embodiment, the pull rods 4 are welded on the end vertical surfaces of the lining pipe 7, the limiting rings 12 are respectively arranged at the two ends of the pressing plates 11, the limiting rings 12 are sleeved on the outer surface of the air bag 8, a cavity between the limiting rings 12 and the air bag 8 is filled with a solidifying material 14, and the solidifying material 14 can be cement mortar, polyurethane and other materials with certain strength. In this embodiment, the low-grade cement mortar is preferably used as the curing material 14, and after the filled low-grade cement mortar is cured, the relative position of the limit ring 12 and the air bag 8 can be fixed. The pressing plate 11 can expand or contract along the radial direction of the lining pipe 7, and the diameter of the limiting ring 11 is slightly smaller than the diameter of the drilling hole.
As shown in fig. 1-6, an embodiment of the present application provides a palletizing tool for being placed in a foundation pit or a slope borehole and for maintaining stability of the foundation pit or the slope, the palletizing tool mainly comprising: the lining pipe 7, the central point that the lining pipe 7 located the coiling instrument is put, and the lining pipe 7 is equipped with a plurality of inlet ports 6 for the surface, and the hollow cylinder of both ends confined, and the fixed drawing part that can bear the drawing effort that is equipped with of one of them blind end of lining pipe 7. The pulling means is preferably a pull rod 4, the pull rod 4 being a solid pull rod, the pull rod 4 being used to push or pull the coiled tool into or out of the borehole.
One closed end of the lining pipe 7 is provided with an air inlet nipple 5 on the same side of the pull rod 4, and the two directions are consistent. The air inlet nipple 5 is a hollow tube, one end of the air inlet nipple is connected with one end of the lining tube 7, the other end of the air inlet nipple is connected with an air source through an external air inlet tube, the air source is used for introducing air into the lining tube 7 through the external air inlet tube and the air inlet nipple 5, a plurality of air inlets 6 are formed in the surface of the lining tube 7, the air inlets 6 are used for filling air into an air bag 8 sleeved on the outer surface of the lining tube 7, the air bag 8 is sleeved on the outer surface of the lining tube 7, the two ends of the air bag 8 are tightly sealed and fixed with the lining tube 7 through a clamp 9, and the air bag 8 can radially expand along the lining tube 7 after being filled with air.
The outside of the air bag 8 of the tray forming tool is provided with a pressing plate 11 as shown in fig. 3, the pressing plate 11 is an arc-shaped thin plate with a convex block 10 at the top, the inner surface of the arc-shaped thin plate of the pressing plate 11 is attached to the outer surface of the air bag 8, and the pressing plate 11 can move along the radial direction of the lining pipe 7 along with the inflating and deflating actions of the air bag 8. The bump 10 arranged on the outer surface of the pressing plate 11 is pressed into the side surface of the drilled hole when the pressing plate 11 expands radially along the lining pipe 7, the cavity which is the same as the bump 10 is formed on the side surface of the drilled hole, then the air bag 8 and the pressing plate 11 are deflated, the air bag 8 and the pressing plate 11 shrink radially along the lining pipe 7 under the action of the annular elastic component which is the elastic telescopic strip 13 and is arranged outside the pressing plate 11 until the air bag 8 is completely attached to the outer surface of the lining pipe 7, then the disc forming tool is rotated to a certain angle (the rotation angle range is 30-90 degrees, the specific rotation angle is determined according to the number of the selected strip pressing plates), the rotation angle is 90 degrees when two pressing plates are selected, the rotation angle is 60 degrees when three pressing plates are selected, the rotation angle is 45 degrees when four pressing plates are selected, the rotation angle is 36 degrees when 5 pressing plates are selected, the rotation angle is 30 degrees when six pressing plates are selected, the number of the general pressing plates is 2-6), the disc forming tool is pulled outwards to a certain distance (the pulling distance is the leftmost bump and the rightmost bump in fig. 3 and the center distance is plus the adjacent bump in the center distance in fig. 5), and the inflation and deflation steps are repeated until all the inflation steps are completed.
The shape and number of the protruding blocks 10, the number of the pressing plates 11, the arrangement mode of the protruding blocks 10 outside the pressing plates 11, and the like directly affect the type of the disc body 1 of the multi-disc soil anchor and the cross-sectional shape of the disc body 1, so that the selection of the protruding blocks 10 can be correspondingly set with reference to the selection of the disc body 1 described below.
The selection of the above-described bump 10 and the pressing plate 11 is specifically exemplified as follows: when the tray body 1 of the multi-tray soil anchor is a full tray, the number of the most selected pressing plates is 4, the multi-tray soil anchor is inflated and expanded into petal-shaped cavities firstly, then the petal-shaped cavities are obtained by rotating the pressing plates by 45 degrees, and the step of rotating the pressing plates can be omitted on the premise that the petal-shaped cavities can meet the requirement of anchoring force in the actual tray supporting process, so that the construction time is shortened, the construction efficiency is improved, and the construction cost is saved. With reference to the above example, the platen 11 and the bump 10 may be adaptively selected according to the type and shape of the tray 1 required in practical application, thereby obtaining an optimal construction scheme.
As shown in fig. 4, in order to ensure that the pressing plate 11 expands within a prescribed range along the radial direction of the liner tube 7 when the coiled tool is inflated in the embodiment of the present application, the outer parts of the hoops 9 at the two ends of the liner tube 7 are provided with the limiting rings 12, the limiting rings 12 are cylinders with end surfaces with middle open holes at one ends, the end surfaces and one end of the limiting rings 12 form steps, and the diameter of the open holes at the end surfaces is equal to the diameter of the air bags 8 sleeved outside the liner tube 7 and not inflated; the diameter of the limiting ring 12 is larger than or equal to the outer diameter of the protruding block 10 attached to the pressing plate 11 on the outer surface of the air bag 8 when the air bag is not inflated. The clamp plate 11 is shorter than the lining pipe 7, the length of the clamp plate 11 is just enough to be attached to the end face of the limiting ring 12, so that two ends of the clamp plate 11 are clamped in the steps formed by the end part of the limiting ring 12 and the end face, when the air bag 8 is inflated, the clamp plate 11 radially expands along the lining pipe 7 until the clamp plate 11 is attached to the inner surface of the step of the limiting ring 12, namely, the gap of the step of the limiting ring 12 is the maximum displacement of the clamp plate 11.
The diameter of the cylinder of the limiting ring 12 is larger than that of the air bag 8, so that a gap exists between the limiting ring 12 and the air bag 8, and in order to limit the expansion of the air bag, a curing material 14 is filled in the gap, and the curing material 14 can be cement mortar, polyurethane or other materials with certain strength. In this embodiment, cement mortar is preferably used as the curing material 14, and after the cement mortar is cured, the cement mortar can perform two functions, namely, the first function of fixing the position of the limiting ring 12 and the second function of limiting the expansion of the section of the air bag 8. Meanwhile, the diameter of the limiting ring 12 is slightly smaller than the diameter of the drilling hole, so that the whole disc forming tool can be easily pushed into or pulled out of the drilling hole through the pull rod 4 under the condition of no inflation, and the soil layer state of the inner side surface of the drilling hole is not damaged.
The disc forming tool is used as a mould, cement slurry or cement mortar is poured to form a multi-disc soil anchor, as shown in fig. 7, which is a multi-disc soil anchor formed by a concrete implementation mode of the embodiment, the multi-disc soil anchor of the embodiment mainly comprises a cylinder 2 and a disc body 1 annularly arranged on the outer surface of the cylinder 2, the cylinder 2 and the disc body 1 are integrally formed after the cement slurry or the cement mortar poured into a drill hole is solidified, the preferred solidifying material of the embodiment is cement slurry, and accelerator and the like can be added into the cement slurry for accelerating the solidification and forming of the cement slurry. The cylinder 2 is internally provided with a drawing component capable of bearing force, the drawing component can be a steel strand or screw steel, and the like, in this embodiment, the steel strand 3 is preferably used as a drawing component with multi-disc soil anchor bearing force, the steel strand 3 is arranged in the center of the cylinder 2 and extends out of one end of the cylinder 2 from inside to outside, and the length of the steel strand 3 extending out of one end of the cylinder 2 is adjusted according to practical application, and the method is not limited.
The multi-disc soil anchor of the embodiment is formed by pouring cement paste into a drill hole for solidification, when the cement paste is poured, the steel stranded wires 3 are sleeved on the centering support and placed in the drill hole, then the cement paste is poured into the drill hole, and after the cement paste is solidified, the steel stranded wires 3 are fixed in the cylinder 2.
In addition, in order to better ensure the grip between the steel strand 3 and the cylinder 2 and prolong the durability of the steel strand 3, it is preferable that the outer portion of the steel strand 3 is selectively plated or selectively coated with other metals or non-metals, such as zinc plating or epoxy resin coating, etc., and the above operation can be adaptively selected according to the actual situation, which is not particularly limited in this embodiment.
The disc body 1 of the multi-disc soil anchor in this embodiment is annularly arranged on the surface of the cylinder 2, the disc body 1 can be a full disc or a non-full disc, when the disc body 1 is a non-full disc, the disc body is divided into two, three, four and other types, and the selection of the disc type can be selected according to the depth of a foundation pit or the gradient of a side slope to be anchored and the construction speed. In this example, the disc body 1 is preferably a full disc, and when the required anchoring force is fixed, the anchoring length of the disc body 1 can be shortened by selecting the full disc, meanwhile, the construction cost is saved, and the construction efficiency is improved. When the tray body 1 is not a full tray, the manner of arranging the tray body 1 on the surface of the cylinder 2 may be interval, opposite arrangement or interval staggered and angled arrangement, and the cross section of the tray body 1 may be circular, trapezoid or other geometric shapes suitable for stress, which is not particularly limited in this embodiment.
The multi-disc soil anchor of the embodiment adopts the method that cement paste is poured into a drilling hole and a cavity, and the multi-disc soil anchor is integrally formed after the cement paste is solidified. Thus, a need exists for a spacer within a borehole, the spacer operation being accomplished using a spacer forming tool. The tray forming tool selected in the embodiment forms a plurality of tray cavities in the drill hole by rotating, stretching and inflating and deflating the air bag for a plurality of times, and finally forms a model of a multi-tray soil anchor in the drill hole.
One embodiment of this embodiment is as follows: the multi-disc soil anchor comprises a multi-disc anchor body and a disc forming tool, wherein the multi-disc anchor body consists of a disc body 1 and a cylinder 2 which are solidified by cement paste, the cylinder 2 obtained by cement solidification wraps a steel strand 3, the disc body 1 is divided into a whole disc, two leaves, four leaves and the like, and the cross section of the disc body 1 is trapezoidal, semicircular and the like; the coiling tool comprises a lining tube 7, an air bag 8, a clamp 9, a pressing plate 11, elastic telescopic strips 12, a protruding block 10 and a limiting ring 12, wherein the air bag 8 is sleeved on the outer surface of the lining tube 7, two ends of the lining tube 7 are closed, a plurality of air inlets 6 are formed in the surface of the lining tube, one of the closed ends is provided with a pull rod 4 and an air inlet nipple 5, the clamp 9 is used for tightening and sealing the air bag 8 and the lining tube 7, a plurality of strip pressing plates 11 are arranged on the outer surface of the air bag 8, protruding blocks 10 are distributed on the surface of the pressing plates 11 at intervals, the outer surface of the pressing plates 11 is wound with the elastic telescopic strips 13, the push-pull rods 4 are welded on the end face of the lining tube 7, the limiting rings 12 are respectively arranged at two ends of the pressing plates 11, the limiting rings 12 are sleeved on the outer surface of the air bag 8, and a cavity between the limiting ring 12 and the air bag 8 is filled with a solidifying material 14. The pressure plate 11 expands or contracts in the radial direction, and the diameter of the limiting ring 12 is slightly smaller than the diameter of the drilled hole.
The multi-disc soil anchor in the embodiment is applied to foundation pit support and soil layer slope support. During construction, firstly, a hole is drilled, a coiling tool is sent to the bottom of the hole through a pull rod 4, at the moment, the outer diameter of a limiting ring 12 is required to be slightly smaller than the diameter of the hole, the coiling tool can be pushed to the bottom of the hole freely, an air inlet pipe is externally connected with an air inlet nipple 5 and is connected with an air source, the air inlet pipe is inflated to an air bag 8 through the air inlet pipe and the air inlet nipple 5, the air bag 8 is inflated and expanded, a pressure plate 11 and a bump 10 positioned on the surface of the air bag 8 are pushed to move radially, the bump 10 is pressed into the soil body, after the bump 10 is completely pressed into the soil body, a pressing plate 11 is tightly attached to the inner surface of the hole, the radial movement amount of the pressing plate 11 is immediately reduced, the expansion amount of the air bag 8 is rapidly reduced, the inflation pressure in the air bag 8 is increased, the air source stops inflating, then the air bag 8 is contracted through the air inlet nipple 5 and an exhaust valve positioned on the external air inlet pipe, the pressing plate 11 is retracted under the action of an elastic telescopic strip 13 positioned on the surface of the air bag, the air bag 8, the pressing plate 11, the air bag 10 and the elastic telescopic strip 13 are restored to the original position, the inner wall of the hole is formed into a concave corresponding to the shape of the bump 10, the concave position, the push-pull rod 4 is rotated in the original position, the hole is aligned with the hole wall to the bump 10 to form a concave position, the concave position, when the bump 10 is pressed into the inner wall, the concave position, the soil body, the concave is formed, after the concave position, the soil body is completely, the concave is formed, and the concave cavity is completely and the whole is compressed into a hollow cavity, and inflated cavity, and the whole is continuously, and inflated cavity, and the hollow cavity is formed.
And (3) placing the steel strand 3 fixed on the centering support and the grouting pipe into the drilled hole, pouring cement slurry, solidifying the slurry to form a multi-disc anchor, tensioning the steel strand 3 after the cement slurry is solidified to reach a certain strength, and applying a pretightening force to anchor the soil body.
In the concrete implementation process, for a soil anchor with the length of 15m and the diameter of 200mm, the length of an anchoring section is 12m, 3 discs are arranged per meter, 36 discs are arranged in total, the outer diameter of each disc is 290mm, and the thickness of each disc is 60mm. The lining pipe 7 in the coiling tool selects a steel pipe with the length of 1500mm, the outer diameter of 89mm and the wall thickness of 3mm, the thickness of a plugging vertical plate at two ends of the steel pipe is 3mm, a hole with the diameter of 6mm is drilled in the middle of the lining pipe 7 to be air-in 6, one end of the vertical plate is welded with a steel pipe with the outer diameter of 25mm and an air inlet nipple 5 with the outer diameter of 15mm and the inner diameter of 10mm, the air inlet nipple 5 is externally connected with an air inlet pipe to an air source, an exhaust valve is arranged on the air inlet pipe, the length of an outer sleeve of the lining pipe 7 is 1500mm, the outer diameter of 98mm and the inner diameter of 90mm are respectively arranged on the rubber air bags 8, the air bags 8 are sealed by a clamp 9, a limiting ring 12 is provided with the steel pipe with the outer diameter of 198mm, the inner diameter of 100mm and the length of 150mm, four arc long pressing plates 11 are paved on the outer sides of the air bags 8, and the length of the pressing plates 11 is 1200mm and the thickness of 3mm; the arc length of each pressing plate 11 is 80mm, four protruding blocks 10 are distributed at intervals along the surface of each pressing plate 11, the distance between the protruding blocks 10 is 300mm, the height is 45mm, the thickness is 60mm, rubber strips with the thickness of 2mm, namely elastic telescopic strips 13, are wound on the outer side of each pressing plate 11, cement paste is filled between each limiting ring 12 and each air bag 8, the limiting rings 12 and the clamping bands 9 are glued into a whole after the mortar is solidified, the radial movement of the pressing plates 11 is controlled by the limiting rings 12, and the air bags 8 are limited in the space enclosed by the limiting rings 12 and the pressing plates 11. The inflation pressure of the air bag 8 is controlled within 0.5 megapascal, the four convex blocks 10 of each section are pressed into four separated pits under the action of air pressure, the push-pull rod is rotated for 45 degrees in situ, the air pressure is continuously inflated to form pits, the pits formed in situ twice form a disc-shaped cavity, the push-pull rod is pulled outwards to a new position, the air pressure is continuously inflated to form cavities, and 36 disc cavities are formed in the whole length of the anchoring section 12 m. And placing the steel stranded wires and the grouting pipes fixed on the centering support into the drilled holes, consistent with the construction method of the existing cement paste bond-wrapped steel stranded wire soil anchor, then pouring cement paste, solidifying the cement paste to form a multi-disc anchor, tensioning the steel stranded wires after the cement paste is solidified to reach a certain strength, and applying pretightening force to anchor the soil body.
Next, advantageous effects of the present application are explained.
1. The multi-disc soil anchor adopts the multi-disc to improve the anchoring force, and the application can correspondingly shorten the anchoring length under the condition that the required anchoring force is equal, thereby reducing the drilling length, the length of the steel strand and the consumption of cement paste, greatly reducing the anchoring cost, and being economical and applicable.
2. The multi-disc soil anchor provided by the application takes a disc forming tool as a mould, the disc forming tool adopts air bag inflation to push the pressing plate to radially expand, the convex blocks on the surface of the pressing plate are pressed into the soil of a drill hole, a plurality of disc cavities are formed through operations such as inflation and deflation, rotation, stretching and the like, cement paste is poured into the expanded drill hole, the cement paste is solidified into disc bodies, and the soil facing surface of each disc body is under the pressure of passive soil, so that higher anchoring force can be finally obtained.
3. The multi-disc soil anchor provided by the application takes the disc forming tool as a mould, the disc forming tool is light in weight, the air bag is small in inflation pressure, the air inlet and exhaust speed is high, the operation is safe and easy, and the construction speed is high.
It will be appreciated by those skilled in the art that the present application can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the application or equivalents thereto are intended to be embraced therein.
Claims (5)
1. A palletizing tool, comprising:
a lining pipe arranged at the innermost layer of the tray forming tool and used for supporting the tray forming tool;
the air bag is sleeved on the outer layer of the lining pipe and has elasticity, and the air bag stretches radially along the diameter of the lining pipe;
the pressing plate is arranged on the outer surface of the air bag, a lug is arranged on the pressing plate, and the pressing plate radially moves along with radial expansion and contraction of the air bag along the inner lining pipe diameter;
the air bag is wrapped on the periphery of the lining pipe, the air bag and the two end parts of the lining pipe are fixedly sealed through a mechanical sealing fixing piece, limiting rings are arranged at the two end parts fixed by the mechanical sealing fixing piece, each limiting ring is a cylinder with an end face with a middle opening at one end, the end face and one end of each limiting ring form a step, the diameter of the opening of each end face is equal to the diameter of the air bag sleeved outside the lining pipe and not inflated, and the diameter of each limiting ring is larger than or equal to the outer diameter of the protruding block attached to the pressing plate on the outer surface of the air bag when the air bag is not inflated;
the pressing plate is an arc-shaped thin plate, the inner surface of the pressing plate is attached to the air bag, and a bump is arranged on the outer surface of the pressing plate; the number of the convex blocks is a plurality, and the convex blocks are oppositely arranged, spaced or staggered on the pressing plate; the number of the pressing plates is 2-6, and the pressing plates are arranged on the outer surface of the air bag in a surrounding mode;
the periphery of the pressing plate is provided with a plurality of annular elastic pieces which are axially distributed among the plurality of convex blocks along the pressing plate;
the length of the pressing plate is shorter than the length of the lining pipe; the two ends of the pressing plate are clamped in steps formed by one end of the limiting ring and the end face; when the air bag is inflated, the outer surface of the pressing plate is attached to the inner surface of the step.
2. A palletizing tool as in claim 1, wherein,
the inner liner tube is a hollow cylinder with both ends sealed and an air inlet hole on the surface; a bearing push-pull component is fixedly arranged on one sealing end of the lining pipe;
an air inlet nipple is further arranged on the sealing end;
the air inlet nipple is consistent with the direction that the push-pull part is positioned at the same end part and the push-pull part is outwards prolonged, one end of the air inlet nipple is fixed and communicated with the lining pipe, and an external air source enters the inside of the lining pipe through the other end of the air inlet nipple.
3. A palletizing tool as in claim 2, wherein,
the air inlets are distributed on the surface of the lining pipe in a uniform or non-uniform mode.
4. A palletizing tool as in claim 1, wherein,
the outer diameter of the limiting ring is smaller than the diameter of the drilling hole, a gap exists between the inner surface of the limiting ring and the outer surface of the air bag, and the gap is filled with a solidifying material.
5. A multi-disc soil anchor prepared by using a disc forming tool according to any one of claims 1 to 4, characterized in that,
the multi-disc earth anchor includes:
the cylinder is internally provided with a drawing component for bearing force, the drawing component extends out of one end of the cylinder, and the extending part is connected with an external force application object;
the disc bodies are arranged on the outer surface of the cylinder in a surrounding mode at intervals;
the cylinder is obtained by curing cement paste or cement mortar, the length of the cylinder is not more than the depth of a drilled hole, and the diameter of the cylinder is equal to the diameter of the drilled hole;
the tray body and the cylinder are integrally formed by curing cement paste or cement mortar, and the tray body is a full tray or a non-full tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407904.XA CN107059861B (en) | 2017-06-02 | 2017-06-02 | Disk forming tool and multi-disk soil anchor prepared by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407904.XA CN107059861B (en) | 2017-06-02 | 2017-06-02 | Disk forming tool and multi-disk soil anchor prepared by using same |
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| Publication Number | Publication Date |
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| CN107059861A CN107059861A (en) | 2017-08-18 |
| CN107059861B true CN107059861B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710407904.XA Active CN107059861B (en) | 2017-06-02 | 2017-06-02 | Disk forming tool and multi-disk soil anchor prepared by using same |
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| CN (1) | CN107059861B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111172994A (en) * | 2019-12-31 | 2020-05-19 | 甘肃建投建设有限公司 | Foundation pit supporting structure based on high-pressure jet grouting pile |
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| RU2005121268A (en) * | 2002-12-06 | 2006-01-20 | Джиотекникал Рейнфорсмент, Инк. (Us) | METHOD FOR CONSTRUCTION OF SUPPORTS IN SOIL AND STRUCTURE OF SUPPORT |
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| JP2000129671A (en) * | 1998-10-23 | 2000-05-09 | Nippon Steel Corp | Steel-pipe pile with knot, manufacture thereof, and bored-pile construction method for steel-pipe pile with knot |
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| CN107059861A (en) | 2017-08-18 |
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