阅读说明：本技术 一种支护锚杆 (Support anchor rod ) 是由 张俊杰 朱敢为 刘康 张丽红 汤彬彬 于 2020-05-25 设计创作，主要内容包括：本发明涉及基坑支护设备领域,公开了一种支护锚杆,其包括杆体组件、杆体套和锁紧组件,锁紧组件包括螺杆和导向传动件,螺杆上设置有滚动件和两个锁紧杆,杆体套内开设有安装槽和通孔,杆体组件包括外杆体和内杆体,导向传动件上下移动带动滚动件滚动,滚动件滚动带动螺杆转动,螺杆转动带动两个锁紧杆进行相对或相背运动,内杆体两端分别连接有螺母和紧固头,紧固头的直径由上至下逐渐增大,杆体套的下端沿周向均匀开设有开口并形成有紧固条。本发明结构简单,设计巧妙,使用时不需注浆,施工操作十分方便,且通过杆体组件、杆体套和锁紧组件的巧妙配合,能够实现支护锚杆整体回收,支护锚杆回收率高。(The invention relates to the field of foundation pit supporting equipment, and discloses a supporting anchor rod which comprises a rod body component, a rod body sleeve and a locking component, wherein the locking component comprises a screw rod and a guide transmission part, a rolling part and two locking rods are arranged on the screw rod, an installation groove and a through hole are formed in the rod body sleeve, the rod body component comprises an outer rod body and an inner rod body, the guide transmission part moves up and down to drive the rolling part to roll, the rolling part rolls to drive the screw rod to rotate, the screw rod rotates to drive the two locking rods to move oppositely or oppositely, two ends of the inner rod body are respectively connected with a nut and a fastening head, the diameter of the fastening head is gradually increased from top to bottom, and the lower end of. The invention has simple structure and ingenious design, does not need grouting when in use, is very convenient for construction operation, can realize the integral recovery of the support anchor rod through the ingenious matching of the rod body component, the rod body sleeve and the locking component, and has high recovery rate of the support anchor rod.)

1. The utility model provides a strut stock, includes body of rod subassembly (1) and body of rod cover (2), its characterized in that: the locking device comprises a locking assembly (3), the locking assembly (3) comprises a screw rod (31), a rolling part (32) is arranged in the middle of the screw rod (31), the screw threads on the screw rod (31) positioned on two sides of the rolling part (32) are opposite in rotating direction, two locking rods (33) are further arranged on the screw rod (31), the two locking rods (33) are respectively in threaded connection with two ends of the screw rod (31), an installation groove (21) for installing the screw rod (31) and a through hole (22) matched with the locking rods (33) are formed in a rod body sleeve (2), the rod body assembly (1) comprises an outer rod body (11) sleeved inside the rod body sleeve (2), the locking assembly (3) further comprises a guide transmission part (34) matched with the rolling part (32), the guide transmission part (34) is slidably installed on the outer side wall of the outer rod body (11), the guide transmission part (34) moves up and down along the length direction of the outer rod body (11), the rolling piece (32) rolls to drive the screw rod (31) to rotate, the screw rod (31) rotates to drive the two locking rods (33) to move oppositely or back to back, thereby realize two check lock poles (33) indentation through-hole (22) in or wear out outside through-hole (22), body of rod subassembly (1) still include with outer body of rod (11) threaded connection's interior body of rod (12), the upper end of interior body of rod (12) is worn out outer body of rod (11) and is connected with nut (13), nut (13) are located the top of body of rod cover (2), the lower extreme of interior body of rod (12) is worn out outer body of rod (11) and is connected with fastening head (14), fastening head (14) are the frustum form, the diameter of fastening head (14) is crescent from top to bottom, the upper end diameter of fastening head (14) is greater than the aperture of body of rod cover (2) lower extreme, opening (23) have evenly been seted up and have fastening strip (24) along circumference to the lower extreme of body of rod cover (.

2. A support bolt according to claim 1, wherein: the rolling element (32) is a gear, the guiding transmission element (34) is a rack, and the gear is meshed with the rack.

3. A support bolt according to claim 2, wherein: the outer rod body (11) is provided with a sliding groove (111) on the outer side wall, one side of the rack close to the outer rod body (11) is provided with a sliding block (341) matched with the sliding groove (111), the rack is connected with the outer rod body (11) in a sliding mode through the sliding block (341), the upper end of the rack is connected with a pull ring (342), and the pull ring (342) is located above the rod body sleeve (2).

4. A support bolt according to claim 3, wherein: the sliding groove (111) is a dovetail groove.

5. A support bolt according to claim 1, wherein: the screw rod (31) is installed in the installation groove (21) through two bearings, the two bearings are respectively located on two sides of the rolling piece (32), the two locking rods (33) are symmetrically arranged, and the rolling piece (32) and the screw rod (31) are integrally formed.

6. A support bolt according to claim 1, wherein: the upper end of the inner rod body (12) is further sleeved with a limiting clamp (4), the limiting clamp (4) comprises a limiting claw (41), a threaded hole is formed in the limiting claw (41), an adjusting rod (42) is connected to the inner thread of the threaded hole, a limiting piece (421) is arranged at one end of the adjusting rod (42), a knob (422) is arranged at the other end of the adjusting rod (42), the limiting piece (421) is located below the limiting claw (41), and the knob (422) is located above the limiting claw (41).

7. A support bolt according to claim 6, wherein: the limiting pieces (421) are arc limiting pieces, and the number of the limiting pieces (421) is 2-4.

8. A support bolt according to claim 1, wherein: still be provided with spacing ring (112) on the outer body of rod (11), seted up in body of rod cover (2) with spacing ring (112) complex ring channel (25), body of rod cover (2) realize spacing to the outer body of rod (11) through ring channel (25) and spacing ring (112) cooperation.

9. A support bolt according to claim 1, wherein: the cross section of the outer rod body (11) is polygonal.

10. A support bolt according to claim 1, wherein: the outer side walls of the rod body sleeve (2) and the inner rod body (12) are both provided with epoxy resin coatings.

Technical Field

The invention relates to the field of foundation pit supporting equipment, in particular to a supporting anchor rod.

Background

In civil engineering foundation pit supporting construction, bolting is a construction technology of a soil wall support commonly used in foundation pit excavation, and is widely applied to side slopes, foundation pits, tunnels, underground pipelines and anti-floating engineering in the industries of traffic, construction, municipal administration, hydropower, mine construction and the like. At present, the construction process of commonly used anchor bolt support is as follows: drilling holes on the side slope of the foundation pit, inserting anchor rods, pouring cement mortar under pressure, and performing maintenance hardening to play a role in supporting the soil wall. However, when the temporary support function of the anchor rod fails, the traditional anchor rod cannot be recovered and is buried underground together with the building, so that a large amount of underground space is occupied, underground garbage is formed, and environmental pollution and steel waste are easily caused. In order to solve the problems, rock and soil workers research various recyclable anchor rods, but the existing recyclable anchor cable systems at home and abroad have the problems of complicated cable body structure and higher recycling cost. If the anchor head is recycled, the outer rubber tube is easily damaged, and the anchor cable is easily bonded with the surrounding soil body after hole forming during laying construction, so that laying is difficult, hole collapse and hole blocking are easily caused, and recycling construction is difficult.

The patent with the Chinese patent number of CN102605780B discloses a recoverable anchor rod for foundation pit support and a construction method thereof, and the recoverable anchor rod comprises a concrete prefabricated part and a round steel anchor rod, wherein a hollow metal thread sleeve is arranged inside the concrete prefabricated part, an external thread is arranged at the front end part of the round steel anchor rod and is in threaded connection with the concrete prefabricated part through the metal thread sleeve, and a locking thread is arranged at the tail part of the round steel anchor rod. The construction method comprises the steps of firstly, pouring concrete around the metal threaded sleeve to manufacture a concrete prefabricated member, and screwing the round steel anchor rod into the concrete prefabricated member; and then grouting to realize the anchoring of the anchor rod. After the completion is strutted, rotatory round steel stock just can be with round steel stock back-off anchor support thread bush, pull out the round steel stock again and can retrieve by the complete pole, the simple swift high efficiency of process, what stayed in the ground body is the lower concrete of intensity and the metal thread sleeve pipe of casing form, when carrying out underground development later, is broken by construction machinery cutting easily, and struts with low costs, simple to operate demolishs easily. However, in the actual use process, the invention needs to carry out grouting and can play a role of supporting only when the slurry is solidified to reach a certain strength, so the defects of complicated construction steps and long construction time consumption exist; meanwhile, after the support is completed, the anchor rod cannot be completely recovered, the metal threaded sleeve still remains in the rock-soil body, and the recovery rate is low.

Disclosure of Invention

Aiming at the defects of complicated construction steps, long construction time consumption, low anchor rod recovery rate and the like of the support anchor rod in the prior art, the invention provides the support anchor rod with simple and convenient construction operation and high recovery rate.

In order to solve the technical problem, the invention is solved by the following technical scheme:

a supporting anchor rod comprises a rod body component, a rod body sleeve and a locking component, wherein the locking component comprises a screw rod, a rolling part is arranged in the middle of the screw rod, the rotating directions of threads on the screw rod positioned on two sides of the rolling part are opposite, two locking rods are also arranged on the screw rod and are respectively in threaded connection with two ends of the screw rod, a mounting groove for mounting the screw rod and a through hole matched with the locking rods are formed in the rod body sleeve, the rod body component comprises an outer rod body sleeved in the rod body sleeve, the locking component also comprises a guide transmission part matched with the rolling part, the guide transmission part is slidably arranged on the outer side wall of the outer rod body, the guide transmission part vertically moves along the length direction of the outer rod body to drive the rolling part to roll, the rolling part rolls to drive the screw rod to rotate, the screw rod rotates to drive the two locking rods to move oppositely or, the body of rod subassembly still includes the interior pole body with outer pole body threaded connection, and the outer pole body of wearing out in the upper end of the interior pole body is connected with the nut, and the nut is located the top of body of rod cover, and the outer pole body of wearing out of the lower extreme of the interior pole body is connected with fastening head, and fastening head is frustum form, and fastening head's diameter is crescent from top to bottom, and fastening head's upper end diameter is greater than the aperture of body of rod cover lower extreme, and the lower extreme of body of rod cover has evenly seted up the opening and has been formed. The support anchor rod is ingenious in design, grouting is not needed during use, construction operation is very convenient, the support anchor rod can be integrally recycled through the ingenious matching of the rod body component, the rod body sleeve and the locking component, and the recovery rate of the support anchor rod is high; the guide transmission part is matched with the rolling part and drives the screw rod to rotate so as to enable the two locking rods to retract into the through holes or penetrate out of the through holes, when the locking rods penetrate out of the through holes, the locking rods can be abutted against the side walls of the anchoring holes, so that the external rod body and the rod body sleeve are fixed, the stability of the external rod body and the rod body sleeve in the anchoring holes is improved, when the locking rods retract into the through holes, the connection relation between the support anchor rod and the foundation pit can be relieved, and the integral recovery of the support anchor rod can be realized; the frustum-shaped fastening head is matched with the fastening strip, the fastening head is moved upwards, the lower end of the rod body sleeve is spread, and the fastening strip is tightly pressed between the fastening head and the side wall of the anchoring hole, so that the inner rod body and the rod body sleeve are fixed, and the stability of the inner rod body and the rod body sleeve in the anchoring hole is improved; and retaining member and fastening head and fastening strip complement each other, can further strengthen the steadiness of body of rod subassembly in the anchor hole.

Preferably, the rolling member is a gear, the guide transmission member is a rack, and the gear is engaged with the rack. The gear rack has the advantages of simple structure, low cost, gear rack meshing, large bearing capacity, stable transmission and high safety and reliability.

As preferred, seted up the spout on the lateral wall of the outer body of rod, the rack is close to one side of the outer body of rod be provided with spout complex slider, the rack passes through slider and outer body of rod sliding connection, the upper end of rack is connected with the pull ring, the pull ring is located the top of body of rod cover. The sliding chute and the sliding block are in sliding fit, so that the connection strength of the rack and the outer rod body and the movement smoothness of the rack can be ensured simultaneously; the arrangement of the pull ring is convenient for pulling the rack.

Preferably, the sliding groove is a dovetail groove. The dovetail groove and the slider are good in connection strength, and the dovetail groove can play a good guiding and limiting effect on the slider.

Preferably, the screw rod is installed in the installation groove through two bearings, the two bearings are respectively located on two sides of the rolling part, the two locking rods are symmetrically arranged, and the rolling part and the screw rod are integrally formed. The whole structure is more compact and reasonable.

Preferably, the upper end of the inner rod body is further sleeved with a limiting clamp, the limiting clamp comprises a limiting claw, a threaded hole is formed in the limiting claw, an adjusting rod is connected with the threaded hole in an inner threaded manner, a limiting piece is arranged at one end of the adjusting rod, a knob is arranged at the other end of the adjusting rod, the limiting piece is located below the limiting claw, and the knob is located above the limiting claw. The spacing clamp is designed ingeniously, and the position of the limiting piece can be adjusted by rotating the adjusting rod through the threaded connection adjusting rod on the limiting claw, so that the limiting piece can fix the iron net laid on the side slope of the foundation pit conveniently, the adjustment is very convenient and reliable, and the overall anti-pulling capacity of the support anchor rod can be improved.

Preferably, the limiting sheet is an arc-shaped limiting sheet. The arc-shaped limiting piece can be used for better limiting and fixing the iron net laid at the foundation pit side slope.

Preferably, the number of the limiting sheets is 2-4. The fixing strength of the limiting clamp to the iron net laid on the side slope of the foundation pit can be enhanced.

Preferably, the outer rod body is further provided with a limiting ring, an annular groove matched with the limiting ring is formed in the rod body sleeve, and the rod body sleeve is matched with the limiting ring through the annular groove to limit the outer rod body. The spacing ring is matched with the annular groove, so that the outer rod body is limited in the rod body sleeve, and the connection tightness of the outer rod body and the rod body sleeve can be enhanced.

Preferably, the cross-section of the outer rod body is polygonal. The rack can be ensured to be attached to the outer side wall of the outer rod body more tightly, and the rack is convenient to mount.

Preferably, the outer side walls of the rod body sleeve and the inner rod body are both provided with epoxy resin coatings. The anti-corrosion performance of the support anchor rod can be improved.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: the invention has simple structure and ingenious design, does not need grouting when in use, is very convenient for construction operation, can realize the integral recovery of the support anchor rod through the ingenious matching of the rod body component, the rod body sleeve and the locking component, and has high recovery rate of the support anchor rod; the guide transmission part is matched with the rolling part and drives the screw rod to rotate so as to enable the two locking rods to retract into the through hole or penetrate out of the through hole, so that the connection and separation of the support anchor rod and the foundation pit are achieved, and the support anchor rod can be fixed and recovered in the anchoring hole; the frustum-shaped fastening head is matched with the fastening strip, so that the inner rod body and the rod body sleeve can be fixed, and the stability of the inner rod body and the rod body sleeve in the anchoring hole is improved; the locking piece, the fastening head and the fastening strip are complementary, so that the stability of the rod body assembly in the anchoring hole can be further enhanced; through setting up spacing clamp, rotate the position that the regulation pole just can adjust spacing piece, the iron mesh of being convenient for spacing piece laying to foundation ditch slope department is fixed, improves the holistic resistance to plucking ability of strut stock.

Drawings

Fig. 1 is a schematic view showing a construction in a state where a bolt is supported in embodiment 1.

Fig. 2 is a schematic structural view of the support bolt in the recovery state in embodiment 1.

Fig. 3 is a schematic view showing the construction of a support bolt according to embodiment 2.

Fig. 4 is a schematic structural view of side slope support by the support anchor rod in embodiment 2.

Fig. 5 is a schematic structural view of the rod cover.

Fig. 6 is a partial cross-sectional view of the rod cover.

Fig. 7 is a schematic structural view of the rod assembly in embodiment 1.

Fig. 8 is a schematic structural view of a rod assembly in embodiment 3.

Fig. 9 is a schematic view of the construction of the locking assembly.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-rod body component, 11-outer rod body, 111-sliding groove, 112-limiting ring, 12-inner rod body, 13-nut, 14-fastening head, 2-rod body sleeve, 21-mounting groove, 22-through hole, 23-opening, 24-fastening strip, 25-annular groove, 3-locking component, 31-screw rod, 32-rolling piece, 33-locking rod, 34-guiding transmission piece, 341-sliding block, 342-pull ring, 4-limiting clamp, 41-limiting claw, 42-adjusting rod, 421-limiting piece and 422-knob.

Detailed Description

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