Auxiliary deviation rectifying device for micro pile steel at different angles

Abstract

The utility model provides an auxiliary deviation rectifying device for micro pile steel at different angles. The auxiliary deviation rectifying device comprises at least two positioning parts and two reinforcing parts, the reinforcing part comprises a hollow pipe sleeve, a clamping rod and a pre-tightening bolt, the clamping rod is arranged on the inner wall of the hollow pipe sleeve and arranged in the axial direction of the hollow pipe sleeve, a screw hole is formed in the side wall of the hollow pipe sleeve, the pre-tightening bolt is installed in the screw hole, and the screwing-in direction of the pre-tightening bolt faces the center of the hollow pipe sleeve; the two reinforcing parts are coaxially arranged at intervals, and the positioning parts are connected between the two reinforcing parts at equal angles; the positioning part comprises connecting parts used for being connected with the reinforcing part and an arch-shaped part located between the two connecting parts, the arched area of the arch-shaped part faces the outer side so as to provide elastic force, and the device has the advantages that the application range is wide, and the influence on the strength of a pile body due to the fact that steel deviates from the center in a hole is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation and slope reinforcement equipment, in particular to an auxiliary deviation-correcting device for micro-pile steels at different angles. Background Art

[0002] Micropiles have been increasingly used in foundation pit support, subsidence control, roadbed and slope reinforcement, and landslide control due to their advantages of non-excavation mechanical drilling, strong applicability to strata, flexible pile location arrangement, little disturbance to sliding bodies, and safety and speed.

[0003] However, due to the size limitation of micropiles, micropiles are prone to deflection, and there are currently few auxiliary correction devices for micropile steel.

[0004] Specifically, in micropile construction, the choice of reinforcing materials, such as steel bars, steel pipes, or steel sections, is determined based on mechanical calculations. In practice, the steel is typically placed centrally within the excavated hole. However, during the grouting process, the positional relationship between the central steel pipe and the inner wall of the hole cannot be guaranteed. Furthermore, when the micropile needs to be tilted at a certain angle to the ground, without an effective auxiliary deflection device, the steel bars will bend during the descent. This deflection of the central steel pipe can affect the strength of the micropile.

[0005] Some of the current auxiliary deflection devices are set on the steel, which will affect the filling of the grouting material and form voids, thereby posing a hidden danger to the safety of the entire project.

[0006] Therefore, it is necessary to solve the problem of center steel being out of center and prevent the formation of voids. Utility Model Content

[0007] The purpose of the utility model is to address the deficiencies of the existing technology and thus provide an auxiliary deviation-correcting device for micro-pile steels at different angles, which has a wide range of applications and reduces the influence of the deviation of the steel from the center in the hole on the strength of the pile body.

[0008] In order to achieve the above-mentioned object, the technical solution adopted by the present utility model is: an auxiliary deviation-correcting device for micro-pile steels at different angles, comprising at least two positioning parts and two reinforcement parts;

[0009] The reinforcement portion includes a hollow pipe sleeve, a clamping rod and a pre-tightening bolt, wherein the clamping rod is arranged on the inner wall of the hollow pipe sleeve and arranged along the axial direction of the hollow pipe sleeve, a screw hole is provided on the side wall of the hollow pipe sleeve, and the pre-tightening bolt is installed in the screw hole, and the screwing direction of the pre-tightening bolt is toward the center of the hollow pipe sleeve;

[0010] The two reinforcement parts are coaxially arranged at intervals, and the positioning parts are connected between the two reinforcement parts at equal angles;

[0011] The positioning portion includes a connecting portion for connecting with the reinforcing portion and an arched portion located between the two connecting portions, wherein the arched area of the arched portion faces outward to provide elastic force.

[0012] Preferably, the inner hole of the hollow tube sleeve is a circular hole, the clamping rod is a cylindrical clamping rod, and the tangent lines of the inner sides of each clamping rod are located on the same circumference.

[0013] Preferably, a plurality of screw holes are distributed at equal angles on the side wall of the hollow pipe sleeve, and the number of the pre-tightening bolts is ≤ the number of screw holes.

[0014] Preferably, the number of the positioning portions is four, and the horizontal angle between two adjacent positioning portions is 90°.

[0015] Preferably, four corners are provided between the connecting portions at both ends of the positioning portion, and all of the four corners are obtuse angles.

[0016] Preferably, there are at least two clamping rods.

[0017] Preferably, a connecting hole is provided on the outer wall of the hollow pipe sleeve, and the connecting portion of the positioning portion is connected and fixed to the hollow pipe sleeve via a connecting bolt and the connecting hole.

[0018] Preferably, the positioning portion is made of spring steel sheet.

[0019] Preferably, the hollow pipe sleeve is made of steel.

[0020] Preferably, the connecting bolt is a butterfly bolt.

[0021] The present invention has substantial features and progress compared to the prior art. Specifically, the present invention utilizes the combination of a reinforcement portion and a positioning portion to provide correction capability, wherein the reinforcement portion is used to abut against the hole wall, so that the positioning portion is maintained at the center of the hole diameter and always remains coaxial with the hole diameter. When the micropile is a vertical pile or a pile foundation inclined at a certain angle, the steel can still be firmly positioned on the median perpendicular of the auxiliary correction device when it moves in the hole, and the edge of the positioning portion is in direct contact with the hole wall, thereby ensuring that the steel remains in the center of the drilled hole.

[0022] Furthermore, when the micropile is inclined at a certain angle, at least two positioning units can support the steel material from sliding down and maintain the stability of the fall, and the use of positioning units with smooth surfaces can make the steel material slide down more easily.

[0023] Furthermore, when the diameter of the steel changes, the diameter of the circular clamping rod can be changed to adapt to the new construction scenario.

[0024] Furthermore, when the borehole diameter changes, the positioning unit can be changed to adapt to the new construction scenario.

[0025] Furthermore, when the device is installed, the operation steps are simple and can be operated by a single person without other auxiliary equipment. Only by tightening the nuts can the process be completed.

[0026] Furthermore, it can adapt to steel materials of different lengths. When the length increases, only the number of auxiliary deviation correction devices needs to be increased at the specified intervals. Brief Description of the Drawings

[0027] Figure 1 It is the front view of the reinforcement part in the present utility model.

[0028] Figure 2 It is the sectional view of the reinforcement part in the present utility model.

[0029] Figure 3 It is the comparison diagram of the front view and the left view of the positioning part in the present utility model.

[0030] Figure 4 It is the front view of the overall structure in the present utility model.

[0031] Figure 5 It is the sectional view of the overall structure in the present utility model.

[0032] Figure 6 It is the construction flow chart of the inclined micropile in the present utility model.

[0033] In the figure: 1. Reinforcement part, 2. Steel bar, 3. Clamping rod, 4. Clamping bolt, 5. Hollow pipe sleeve, 6. Reserved hole, 7. Hole diameter A positioning unit, 7-1. Unit A part, 7-2. Unit B part, 7-3. Unit C part, 8. Hole diameter B positioning unit, 9. Connecting bolt, 10. Soil layer, 11. Drilling hole, 12. Grouting pipe, 13. Auxiliary deviation correction device, 14. Drill rod, 15. Drill bit, 16. Mortar. Detailed Description of the Preferred Embodiment

[0034] The technical solution of the present utility model will be further described in detail below through specific embodiments.

[0035] As Figures 1-6 shown, an auxiliary deviation correction device for micropile steel materials at different angles includes at least two positioning parts 7 and two reinforcement parts 1.

[0036] The reinforcement part 1 includes a hollow pipe sleeve 5, a clamping rod 3 and a pre-tightening bolt 4.

[0037] In this embodiment, the inner hole of the hollow pipe sleeve 5 is a circular hole and is made of steel. The clamping rod 3 is arranged on the inner wall of the hollow pipe sleeve 5 and along the axial direction of the hollow pipe sleeve 5. The number of the clamping rods 3 is at least two. The clamping rods 3 are cylindrical clamping rods. The tangents on the inner side of each clamping rod 3 are located on the same circumference. The main function of the clamping rod 3 is to adjust the effective inner diameter of the hollow pipe sleeve 5. If the diameter of the steel bar 2 is larger, the diameter of the clamping rod 3 is reduced. If the diameter of the steel bar 2 is smaller, the diameter of the clamping rod 3 is increased to facilitate the stable clamping of the steel bar 2 so that it is located at the center of the hollow pipe sleeve 5.

[0038] Screw holes are provided on the side walls of the hollow pipe sleeve 5, and the pre-tightening bolts 4 are installed in the screw holes. The screwing direction of the pre-tightening bolts 4 is toward the center of the hollow pipe sleeve 5. Several screw holes are distributed at equal angles on the side walls of the hollow pipe sleeve, and the number of the pre-tightening bolts is ≤ the number of screw holes.

[0039] The purpose of the pre-tightening bolt 4 is to compress the steel bar 2 into the hollow pipe sleeve 5 .

[0040] The two reinforcement parts 1 are coaxially spaced apart, and the positioning parts 7 are connected between the two reinforcement parts 1 at equal angles;

[0041] The positioning portion 7 includes a connecting portion 7-1 for connecting to the reinforcing portion and an arched portion 7-2 located between the two connecting portions. The arched area of the arched portion 7-2 faces outward to provide elastic force.

[0042] In this embodiment, there are four positioning portions, and the horizontal angle between two adjacent positioning portions is 90°. Four corners are provided between the two end connecting portions of each positioning portion 7, and the four corners are all obtuse angles, so that the two end connecting portions 7-1 are in a vertical state, and the arched portion 7-2 is formed after passing through the transition section 7-3. The material is preferably spring steel, which provides good elasticity.

[0043] A connecting hole 6 is provided on the outer wall of the hollow pipe sleeve 5. The connecting portion 7-1 of the positioning portion 7 is connected and fixed to the hollow pipe sleeve 5 via a connecting bolt 9 and the connecting hole 6. The connecting bolt 9 is preferably a butterfly bolt, which is easy to operate.

[0044] During specific operations, according to the properties of the steel, those with higher strength should be set at larger intervals, while those with lower strength should be set at higher density.

[0045] After calculating the setting position, loosen the pre-tightening bolt 4, slide the steel bar 2 along the cavity of the hollow pipe sleeve 5 to the specified position, place two clamping rods 3, and the position forms a regular triangle with the pre-tightening bolt 4. At this time, tighten the pre-tightening bolt 4 to complete the fixation of the steel bar 2 at one point.

[0046] Repeat the above steps to complete the fixation of all points that need to be pre-tightened, and then start to fall along the completed drilled holes.Figure 4 As shown, at this time, since the arcuate portion 7-2 is parallel to the hole wall of the drill hole 11 and the material is relatively smooth, the falling is very smooth. During the falling process, at least two positioning units 7 are in close contact with the drill hole 11 and continuously receive force, so it is very stable when falling, and the steel material is always located at the center of the drill hole 11.

[0047] After injecting the mortar 16 through the grouting pipe 12 under pressure multiple times, the construction of a micro-pile is completed.

[0048] Finally, it should be noted that: The above has made a detailed description of the preferred embodiment of this patent, but this patent is not limited to the above embodiment. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can also be made without departing from the gist of this patent.

Claims

1. An auxiliary deviation correction device for micro-pile steel materials at different angles, characterized in that: It includes at least two positioning parts and two reinforcing parts; The reinforcing part includes a hollow pipe sleeve, a clamping rod and a pre-tightening bolt. The clamping rod is arranged on the inner wall of the hollow pipe sleeve and along the axial direction of the hollow pipe sleeve. A screw hole is arranged on the side wall of the hollow pipe sleeve, and the pre-tightening bolt is installed in the screw hole. The screwing direction of the pre-tightening bolt faces the center of the hollow pipe sleeve; The two reinforcing parts are arranged coaxially at intervals, and each positioning part is connected between the two reinforcing parts at equal angles; The positioning part includes a connecting part for connecting with the reinforcing part and an arched part located between the two connecting parts. The arched area of the arched part faces outward to provide an elastic force.

2. The auxiliary deviation rectification device for micro-pile steel materials at different angles according to claim 1, wherein: The inner hole of the hollow pipe sleeve is a circular hole, the clamping rod is a cylindrical clamping rod, and the tangents on the inner sides of the clamping rods are located on the same circumference.

3. The auxiliary deviation rectification device for micro-pile steel materials at different angles according to claim 2, characterized in that: A number of screw holes are equiangularly distributed on the side wall of the hollow pipe sleeve, and the number of pre-tightening bolts ≤ the number of screw holes.

4. The auxiliary deviation rectification device for micro-pile steel materials at different angles according to claim 3, characterized in that: The number of the positioning parts is four, and the horizontal included angle between two adjacent positioning parts is 90°.

5. The auxiliary deviation rectification device for micro-pile steel materials at different angles according to claim 4, characterized in that: Four corners are arranged between the two end connecting parts of the positioning part, and all four corners are obtuse angles.

6. The auxiliary deviation rectification device for steel materials of micro-piles at different angles according to claim 5, characterized in that: The number of the clamping rods is at least two.

7. The auxiliary deviation rectification device for micro-pile steel materials at different angles according to claim 6, characterized in that: A connecting hole is arranged on the outer wall of the hollow pipe sleeve, and the connecting part of the positioning part is connected and fixed to the hollow pipe sleeve through a connecting bolt and the connecting hole.

8. The auxiliary deviation rectifying device for micro-pile steel materials at different angles according to claim 7, characterized in that: The material of the positioning part is spring steel sheet.

9. The auxiliary deviation rectifying device for micro-pile steel materials at different angles according to claim 8, characterized in that: The material of the hollow pipe sleeve is steel.

10. The auxiliary deviation rectification device for micro-pile steel materials at different angles according to claim 9, characterized in that: The connecting bolt is a butterfly bolt.

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