Assembly type recoverable anchor rod

Abstract

The utility model discloses an assembly type recoverable anchor rod which comprises a tail anchor rod, standard section anchor rods and a head anchor rod, the tail anchor rod and the standard section anchor rods are connected through connecting rods, the adjacent standard section anchor rods are connected through connecting rods, and the standard section anchor rods and the head anchor rod are connected through connecting rods. The outer diameters of the tail anchor rod, the standard section anchor rod, the head anchor rod and the connecting rod are equal; positioning clamping holes are formed in one end of the tail anchor rod, one end of the head anchor rod and the two ends of the standard section anchor rod, U-shaped spring pieces are fixedly connected to the two sides of the standard section anchor rod, and positioning pins are fixedly connected to the two ends of each U-shaped spring piece. The tail anchor rod, the standard section anchor rod, the head anchor rod and the connecting rod are all wound with spiral threads. The outer diameter of the connecting rod, the outer diameter of the tail anchor rod, the outer diameter of the standard section anchor rod and the outer diameter of the head anchor rod are designed to be of an equal-diameter structure, and the problem that the anchor rod drilling resistance is large due to sudden change of the cross section of the anchor rod is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of anchor rod support, especially relates to an assembled recyclable anchor rod. BACKGROUND

[0002] In foundation pit support engineering, temporary support structure occupies the dominant position, when the foundation pit is backfilled, the traditional anchor rod remains in the soil as a permanent metal component, which not only causes underground space metal pollution, but also becomes a major safety hazard for later underground space development (such as subway tunnel, comprehensive pipe gallery, power tunnel and other shield construction). The cases of construction interruption caused by the collision between abandoned anchor rod and shield cutter occur frequently, which not only causes economic loss, but also seriously restricts the efficient use of urban underground space.

[0003] In view of the above problems, the prior art proposes a recyclable anchor rod solution. For example, CN110042835B discloses a self-drilling and self-anchoring recyclable anchor rod for soil and sand layer and an anchoring method thereof, which realizes the rotary anchoring with the soil body by setting the spiral rib-shaped attachment part on the surface of the rod body, and realizes the length adjustable function through the male and female connecting pieces between the tail, middle and head rod bodies. The technical scheme solves the problem of anchor rod recovery through mechanical rotary insertion, and the modular design can adapt to the needs of foundation pits of different depths, significantly improving the flexibility of the support system.

[0004] Although the recycling problem of the anchor rod is solved, there are still some significant problems in the use process:

[0005] Firstly, the connecting female part adopts an outward convex structure design, and the diameter is significantly larger than that of the adjacent rod body, forming a stepped mutation cross section during the rotary insertion of the anchor rod. This non-streamlined structure leads to a nonlinear increase in the radial resistance of the soil body to the anchor rod, especially in dense sand or clay layers, and the drilling torque increases more obviously.

[0006] Secondly, the excessive drilling resistance forces the construction equipment to be equipped with a high-power power head, increasing the cost of support construction. INVENTION CONTENTS

[0007] The utility model aims at overcoming the defects in the prior art, and provides an assembled recyclable anchor rod, so as to solve the problem of large anchor rod drilling resistance caused by the outward convexity of the connecting piece after the connection of the existing assembled recyclable anchor rod, and high power requirement for the drilling equipment.

[0008] In order to achieve the above purpose, the utility model adopts the technical scheme of:

[0009] An assembled recyclable anchor rod, comprising a tail anchor rod, a standard section anchor rod and a head anchor rod, one end of the tail anchor rod is provided with a clamping part for connecting with a drilling power equipment, the tail anchor rod, the standard section anchor rod and the head anchor rod are connected through connecting rods, the outer diameters of the tail anchor rod, the standard section anchor rod, the head anchor rod and the connecting rods are equal, one end of the tail anchor rod and the head anchor rod and two ends of the standard section anchor rod are provided with positioning clamping holes, the standard section anchor rod is fixedly connected with U-shaped spring sheets on two sides, the U-shaped spring sheets are fixedly connected with positioning pins on two ends, the positioning pins are clamped in the positioning clamping holes after the connecting rods are connected with the tail anchor rod, the standard section anchor rod and the head anchor rod, the tail anchor rod, the standard section anchor rod, the head anchor rod and the connecting rods are wound with spiral wires outside, and the spiral wires are continuously arranged on the anchor rods after the tail anchor rod, the standard section anchor rod, the head anchor rod and the connecting rods are plugged.

[0010] Further, the cross section of the spiral wire is triangular or trapezoidal.

[0011] Further, the spiral wire is provided with uniform sawteeth.

[0012] Further, two connecting arms are symmetrically arranged on two ends of the connecting rod, one end of the tail anchor rod and the head anchor rod and two ends of the standard section anchor rod are provided with positioning end plates, and the end of the connecting arm abuts against one side of the positioning end plate when the connecting rod is plugged with the tail anchor rod, the standard section anchor rod and the head anchor rod.

[0013] Still further, a groove is arranged on the outer side of the connecting arm, a boss is arranged on the inner wall of the end of the tail anchor rod, the standard section anchor rod and the head anchor rod, and the boss is clamped in the groove after the connecting rod is plugged with the tail anchor rod, the standard section anchor rod and the head anchor rod.

[0014] Still further, a clamping groove is arranged on two sides of the positioning end plate, one end of the connecting arm is clamped in the clamping groove after the connecting rod is plugged with the tail anchor rod, the standard section anchor rod and the head anchor rod, and the end of the connecting arm abuts against the bottom of the clamping groove.

[0015] Further, the included angles of the upper ends of the clamping grooves on two sides are equal to a, the included angles of the lower ends of the clamping grooves on two sides are equal to b, a and b are not equal, and the included angles of the two ends of the clamping groove and the connecting arm constitute an anti-fumble structure.

[0016] The beneficial effects of the present application are as follows:

[0017] 1)The utility model discloses an equal-diameter structure is designed to the outer diameter of connecting rod, tail anchor rod, standard section anchor rod and head anchor rod, avoids the problem that anchor rod cross section mutation causes anchor rod drilling resistance is big, simultaneously, utilize connecting rod and connect tail anchor rod, standard section anchor rod and head anchor rod, the overall length of anchor rod is adjusted according to actual anchoring depth, and the flexibility of anchor rod is enhanced.

[0018] 2)The cross section of the thread is designed as a triangle or a trapezoid, and the outer edge of the thread is designed as a sawtooth structure, which not only ensures the strength of the connection between the thread and the anchor rod, but also reduces the influence of impurities in the soil on the drilling resistance of the anchor rod.

[0019] 3)By setting a connecting arm at the end of the connecting rod and setting a positioning end plate at the end of the tail anchor rod, the head anchor rod and the standard section anchor rod, which abuts against the end of the connecting arm, the positioning pin and the positioning clamping hole can be quickly positioned, and in the process of anchor rod drilling, the positioning end plate bears the axial force of the anchor rod, thereby reducing the working load of the positioning pin.

[0020] 4)By setting a groove on the outer side of the connecting arm and a boss on the inner wall of the end of the tail anchor rod, the standard section anchor rod, the head anchor rod and the connecting rod, the boss and the groove are matched to bear the torsional force during anchor rod drilling, thereby further reducing the working load of the positioning pin. In addition, clamping grooves are arranged on both sides of the positioning end plate to clamp the end of the connecting arm, so that the connecting arm forms a simply supported structure between the connecting rod and the positioning end plate, thereby enhancing the stability and carrying capacity of the connecting arm and improving the strength and durability of the connecting arm during use.

[0021] 5)The included angle of the upper end of the clamping groove is equal to the included angle of the upper end of the connecting arm, and the included angle of the lower end of the clamping groove is equal to the included angle of the lower end of the connecting arm, but the included angle of the upper end is not equal to the included angle of the lower end, so that the included angles of the clamping groove and the connecting arm at both ends form an anti-fool structure, the connecting rod can only be inserted into the tail anchor rod or the standard section anchor rod or the head anchor rod from one direction, thereby avoiding the disconnection of the front and rear threads due to reverse insertion and ensuring the continuity of the thread. BRIEF DESCRIPTION OF DRAWINGS

[0022] ATTACHMENT Figure 1 is an assembled schematic diagram of the assembled recyclable anchor rod.

[0023] ATTACHMENT Figure 2 is an exploded view of the assembled recyclable anchor rod.

[0024] ATTACHMENT Figure 3 is a partial sectional view of the standard section anchor rod.

[0025] ATTACHMENT Figure 4 is a schematic diagram of the connecting rod.

[0026] ATTACHMENT Figure 5 is a side view of the positioning end plate.

[0027] Appendix Figure 6 This is a side view of the connecting rod.

[0028] In the figure, 1 is the tail anchor rod; 11 is the clamping part; 12 is the positioning hole; 2 is the connecting rod; 21 is the U-shaped spring plate; 22 is the positioning pin; 23 is the connecting arm; 24 is the groove; 3 is the standard section anchor rod; 31 is the boss; 4 is the head anchor rod; 5 is the spiral thread; 6 is the positioning end plate; 61 is the slot. Detailed Implementation

[0029] The following will be combined with the appendix Figures 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] like Figure 1 As shown, a prefabricated recyclable anchor bolt includes a tail anchor bolt 1, a standard section anchor bolt 3, and a head anchor bolt 4. One end of the tail anchor bolt 1 is provided with a clamping part 11 for connection to drilling power equipment. The tail anchor bolt 1 is connected to the standard section anchor bolt 3, adjacent standard section anchor bolts 3 are connected to each other, and the standard section anchor bolt 3 is connected to the head anchor bolt 4 via a connecting rod 2. The outer diameters of the tail anchor bolt 1, standard section anchor bolt 3, head anchor bolt 4, and connecting rod 2 are equal. Figure 2 As shown, one end of the tail anchor rod 1 and the head anchor rod 4, as well as both ends of the standard section anchor rod 3, are provided with positioning holes 12, such as... Figure 4 As shown, U-shaped spring plates 21 are fixedly connected to both sides of the standard section anchor rod 3, and positioning pins 22 are fixedly connected to both ends of the U-shaped spring plates 21. After the connecting rod 2 is connected to the tail anchor rod 1, the standard section anchor rod 3, and the head anchor rod 4, the positioning pins 22 are locked in the positioning holes 12; Figure 1As shown in the figure, the tail anchor rod 1, the standard section anchor rod 3, the head anchor rod 4 and the connecting rod 2 are all wrapped with the spiral wire 5, and the spiral wire 5 is arranged continuously on the anchor rod after the tail anchor rod 1, the standard section anchor rod 3, the head anchor rod 4 and the connecting rod 2 are inserted.

[0032] As shown in the figure, Figure 3 , Figure 4 the cross section of the spiral wire 5 is triangular or trapezoidal, which ensures the strength of the connection between the spiral wire 5 and the tail anchor rod 1, the standard section anchor rod 3, the head anchor rod 4 and the connecting rod 2.

[0033] As shown in the figure, Figure 2 the spiral wire 5 is provided with uniformly arranged sawteeth, which is conducive to enhancing the cutting effect of the spiral wire 5 on the soil body and reducing the influence of impurities (such as tree roots, etc.) in the soil body on the resistance during anchor rod drilling.

[0034] As shown in the figure, Figure 3 , Figure 4 both ends of the connecting rod 2 are symmetrically provided with two connecting arms 23, one end of the tail anchor rod 1 and the head anchor rod 4 and both ends of the standard section anchor rod 3 are provided with a positioning end plate 6, and when the connecting rod 2 is inserted with the tail anchor rod 1, the standard section anchor rod 3 and the head anchor rod 4, the end of the connecting arm 23 abuts against one side of the positioning end plate 6, which not only facilitates the quick positioning of the positioning pin 22 and the positioning clamping hole 12, but also reduces the working load of the positioning pin 22 by bearing the axial force of the anchor rod during anchor rod drilling.

[0035] As shown in the figure, Figure 3 , Figure 4 the outer side of the connecting arm 23 is provided with a groove 24, and the inner wall of the end of the tail anchor rod 1, the standard section anchor rod 3, the head anchor rod 4 and the connecting rod 2 is provided with a boss 31, and after the connecting rod 2 is inserted with the tail anchor rod 1, the standard section anchor rod 3 and the head anchor rod 4, the boss 31 is clamped in the groove 24; the boss 31 and the groove 24 cooperate to bear the torsional force during anchor rod drilling, further reducing the working load of the positioning pin 22.

[0036] As shown in the figure, Figure 5 the positioning end plate 6 is provided with a clamping groove 61 on both sides, and after the connecting rod 2 is inserted with the tail anchor rod 1, the standard section anchor rod 3 and the head anchor rod 4, one end of the connecting arm 23 is clamped in the clamping groove 61, and the end of the connecting arm 23 abuts against the bottom of the clamping groove 61, and the connecting arm 23 forms a simply supported structure instead of a cantilever structure under the joint action of the connecting rod 2 and the clamping groove 61 of the positioning end plate 6, thereby enhancing the stability and carrying capacity of the connecting arm 23 and improving the strength and durability of the connecting arm 23 during use.

[0037] As shown in the figure, Figure 5 , Figure 6As shown, the included angle of the upper end of the two side clamping grooves 61 is equal to a, the included angle of the lower end of the two side clamping grooves 61 is equal to b, and a and b are not equal, the included angles of the two ends of the clamping grooves 61 and the connecting arms 23 constitute an anti-fumble structure, so that the connecting rod 2 can only be inserted into the tail anchor rod 1 or the standard section anchor rod 3 or the head anchor rod 4 from one direction, avoiding the disconnection of the front and rear rotating wires 5 due to reverse insertion, and ensuring the continuity of the rotating wire 5.

[0038] The above is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the present claims, which shall belong to the protection scope of the utility model.

Claims

1. A prefabricated recyclable anchor bolt, comprising a tail anchor bolt, standard anchor bolt sections, and a head anchor bolt, wherein one end of the tail anchor bolt is provided with a clamping part for connection to drilling power equipment, and the tail anchor bolt is connected to the standard anchor bolt section, adjacent standard anchor bolt sections, and the head anchor bolt section via connecting rods, characterized in that, The tail anchor, standard section anchor, head anchor, and connecting rod have the same outer diameter. One end of the tail anchor and head anchor, and both ends of the standard section anchor, are provided with positioning holes. U-shaped spring plates are fixedly connected to both sides of the standard section anchor, and positioning pins are fixedly connected to both ends of the U-shaped spring plates. After the connecting rod is connected to the tail anchor, standard section anchor, and head anchor, the positioning pins are engaged in the positioning holes. All the tail anchor, standard section anchor, head anchor, and connecting rod are externally wound with spiral wire, and after the tail anchor, standard section anchor, head anchor, and connecting rod are interlocked, the spiral wire is continuously arranged on the anchor.

2. The prefabricated recyclable anchor bolt according to claim 1, characterized in that, The cross-section of the spiral wire is triangular or trapezoidal.

3. The prefabricated recyclable anchor bolt according to claim 1, characterized in that, The spiral wire is provided with evenly arranged serrations.

4. A prefabricated recyclable anchor bolt according to any one of claims 1-3, characterized in that, Two connecting arms are symmetrically provided at each end of the connecting rod. One end of the tail anchor rod and the head anchor rod, as well as both ends of the standard section anchor rod, are provided with positioning end plates. When the connecting rod is inserted into the tail anchor rod, the standard section anchor rod, and the head anchor rod, the end of the connecting arm abuts against one side of the positioning end plate.

5. A prefabricated recyclable anchor bolt according to claim 4, characterized in that, The connecting arm has a groove on its outer side, and the tail anchor rod, standard section anchor rod, head anchor rod and connecting rod have protrusions on their inner walls at the ends where they are inserted. After the connecting rod is inserted with the tail anchor rod, standard section anchor rod and head anchor rod, the protrusions are locked in the groove.

6. A prefabricated recyclable anchor bolt according to claim 5, characterized in that, The positioning end plate has slots on both sides. After the connecting rod is inserted into the tail anchor rod, standard section anchor rod, and head anchor rod, one end of the connecting arm is locked in the slot, and the end of the connecting arm abuts against the bottom of the slot.

7. A prefabricated recyclable anchor bolt according to claim 6, characterized in that, The included angle between the upper ends of the two card slots and the upper ends of the two connecting arms is equal to 'a', and the included angle between the lower ends of the two card slots and the lower ends of the two connecting arms is equal to 'b'. However, 'a' and 'b' are not equal. The included angle between the card slots and the two ends of the connecting arms constitutes a foolproof structure.

Images