CN214170580U

CN214170580U - Combined grouting anchor head

Info

Publication number: CN214170580U
Application number: CN202023256012.0U
Authority: CN
Inventors: 李战敏
Original assignee: Luoyang Gongyna Technology Co ltd
Current assignee: Luoyang Gongyna Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-10
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a combined grouting anchor head, which comprises an anchor head body, a grouting plug and a grouting hose, wherein the grouting plug is assembled in the anchor head body to convey grout to the anchor head body and is provided with a check sheet for preventing the grout in the anchor head body from flowing back; the front end of the grouting hose is sleeved on the periphery of the grouting plug and conveys grout into the grouting plug. The utility model discloses modular slip casting anchor head has one section thick liquid influence slip casting once more and prevents the dual efficiency of thick liquid refluence when preventing segmentation slip casting, satisfies the slip casting demand.

Description

Combined grouting anchor head

Technical Field

The utility model belongs to geotechnical engineering anchor field especially relates to a modular slip casting anchor head.

Background

Anchor heads are known and are commonly used in geotechnical engineering, such as slopes, foundation pits, mining and tunnels. The existing anchor head has the phenomenon that slurry flows back to the anchor rod due to overlarge slurry liquid pressure in the anchor head in the later stage of grouting, so that inconvenience is brought to construction. Secondly, when the existing anchor rod is subjected to sectional grouting, the first section grouting is generally completed firstly, then the grouting is suspended for about 24 hours to enable the grout to be primarily solidified and then the second section grouting is performed, so that the grout of the primarily solidified first section grouting is filled in the anchor rod when the second section grouting is started, and the influence is brought to the second section grouting.

Disclosure of Invention

In view of the defects and the improvement of the needs of the existing anchor head, the inventor invents a combined grouting anchor head based on experience, professional knowledge and actual needs of the design and manufacture of the product for many years, so that the combined grouting anchor head can realize double effects of preventing the grouting from being influenced by the grouting slurry of the previous section during sectional grouting and preventing the slurry from flowing backwards, and is more practical.

The purpose of the utility model and the technical problem thereof are realized by adopting the following technical scheme. According to the utility model provides a combined grouting anchor head, which comprises an anchor head body, a grouting plug and a grouting hose, wherein the grouting plug is assembled in the anchor head body to convey grout to the anchor head body and is provided with a check sheet for preventing the grout in the anchor head body from flowing back; the front end of the grouting hose is sleeved on the periphery of the grouting plug and conveys grout into the grouting plug.

The object of the present invention and the technical problems solved thereby can also be achieved by the following technical measures.

In the combined grouting anchor head, the front end of the anchor head body is conical, and a plurality of inverted tooth-shaped friction plates which are distributed along the length direction and used for preventing the anchor head from retreating are arranged on the periphery of the anchor head body.

In the combined grouting anchor head, the periphery of the front end of the anchor head body is further provided with a plurality of axially distributed grout overflow holes for grout to flow out, and the front end of each grout overflow hole is further provided with a grout blocking sheet for enabling the grout to flow backwards.

In the combined grouting anchor head, the front end surface of the outer circumference protrusion of the grouting plug is in stop fit with the stop of the inner circumference stop-in table of the anchor head body to realize front end limiting, and the rear end surface of the outer circumference protrusion is in stop fit with the front end surface of the grouting anchor rod fixedly assembled at the rear end of the anchor head body to realize rear end limiting.

The combined grouting anchor head is characterized in that the grouting hose is pressed on the periphery of the grouting plug by the grouting anchor rod, and barb threads for enhancing the tensile strength of the grouting hose are further arranged on the periphery of the grouting plug.

In the combined grouting anchor head, the anchor head body is made of flexible plastic with elasticity.

Compared with the prior art, the utility model at least possesses following beneficial effect:

1. the utility model discloses an anchor head body possesses certain pliability, including the top taper, the equal elasticity is protruding to the pawl form, and the in-process of this anchor head imbedding rock hole more can adapt to the downthehole complicated environment of rock than ordinary plastics anchor head, has solved the defect that original anchor head suicide formula pushed into to really realize the anchor effect of anchor head.

2. The utility model discloses a segmentation slip casting function realizes through slip casting stopper and slip casting hose: before inserting the anchor rod into the rock hole, the grouting hose is sleeved at one end of the grouting plug, then the grouting hose and the grouting plug are inserted into the inner cavity of the anchor rod, and finally the anchor head body is screwed and sent to the rock hole. After one section slip casting is finished, standing for a period of time to enable the grout to be preliminarily solidified, and then withdrawing the slip casting hose, so that no residual grout is left in the slip casting anchor rod during next slip casting, the secondary slip casting is not influenced, and the sectional slip casting requirement is met.

Drawings

Fig. 1 is a schematic structural view of the combined grouting anchor head of the present invention;

FIG. 2 is a schematic structural view of a grouting plug of the combined grouting anchor head of the present invention;

fig. 3 is a schematic structural view of an anchor head body of the combined grouting anchor head of the utility model;

fig. 4 is a front view of fig. 3.

[ description of main element symbols ]

1: anchor head body

2: grouting plug

3: grouting hose

4: grouting anchor rod

5: barb thread

6: check sheet

7: body

8: friction plate

9: slurry overflow hole

10: grout stop sheet

11: reinforcing rib

12: stop-in table

13: round thread

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the combined grouting anchor head according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Please refer to fig. 1-4, which are schematic structural diagrams of each part of the combined grouting anchor head of the present invention, the grouting anchor head includes an anchor head body 1, a grouting plug 2 and a grouting hose 3, wherein the front end of the anchor head body 1 is conical, the periphery of the anchor head body is provided with a plurality of inverted tooth-shaped friction plates 8 distributed along the length direction for preventing the anchor head from moving backward, and the periphery of the front end of the anchor head body 1 is further provided with a plurality of grout holes 9 distributed along the axial direction for allowing grout to flow out. In the embodiment of the present invention, the friction plates have three circumferentially and uniformly distributed friction plates, there are 3 slurry overflow holes 9, and each slurry overflow hole is located between two friction plates 8, but not limited thereto.

The position that the periphery of anchor head body 1 is located overflow hole 9 the place ahead still is equipped with and is used for making the thick liquid to flow backward fender thick liquid piece 10, and the setting of this fender thick liquid piece 10 can reduce the thick liquid to the impact of rock-hole bottom and flow behind the thick liquid with higher speed, makes it fill up the clearance between anchor head and the cliff more fast.

The hollow grouting plug 2 is assembled in the anchor head body 1 and is matched with the stop of the stop-in platform 12 in the anchor head body 1 through the outer protrusion at the front end of the grouting plug to realize front end limit. The front end of the hollow grouting anchor rod 4 which is connected with the inner circular thread 13 of the grouting anchor head 1 in a matching way through the outer circular thread is stopped and limited with the outer convex rear end surface at the front end of the grouting plug 2. The front end of the grouting hose 3 is clamped between the grouting plug 2 and the grouting anchor rod 4, and preferably, barb threads 5 for enhancing connection with the grouting hose 3 are arranged on the periphery of the grouting plug 2.

The front end of the grouting plug 2 is provided with a stop sheet 6 for preventing grout entering the anchor head body 1 from the cavity of the grouting plug from flowing back, the stop sheet 6 with one end fixed on the grouting plug 2 movably stops at the front end of the cavity of the grouting plug 2 to prevent the grout in the anchor head body from entering the grouting plug, and the grout can be moved away under the impact of fluid in the grouting plug, so that the fluid enters the anchor head body from the cavity of the grouting plug and then flows out from a grout overflow hole 9 of the anchor head body. After grouting work is finished, grout injection is stopped, then the descending liquid in the anchor head body flows back, the check sheet 6 is pushed by the grout in the anchor head body, the free end of the check sheet is tightly pressed on the front end face of the grouting plug, and the descending liquid in the anchor head body is prevented from flowing back into the grouting plug.

In the embodiment of the present invention, the material of the anchor head body 1 is flexible plastic having elasticity, but is not limited thereto.

The working principle of the utility model is as follows:

when the construction, at first drill hole on the cliff, then will the utility model provides a slip casting hose cover is at slip casting stopper afterbody, by cavity stock top lock at the anchor head originally internally, together impel the country rock hole, reachs the slip casting position. During grouting, grouting is carried out through the grouting hose, and grout is pressed into the rock hole through the grouting plug and the hole of the anchor head body. When the set grouting pressure is reached, grouting is stopped, and the check sheet of the grouting plug is under the action of reverse pressure to seal the grouting hole of the grouting plug, so that grout cannot flow backwards. And after grouting is finished, the grouting hose is removed for next grouting.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention, but all the modifications, changes and modifications of the above embodiments by the technical spirit of the present invention are within the scope of the present invention.

Claims

1. A combined grouting anchor head is characterized by comprising an anchor head body, a grouting plug and a grouting hose, wherein the grouting plug is assembled in the anchor head body to convey grout to the anchor head body and is provided with a check sheet for preventing the grout in the anchor head body from flowing back; the front end of the grouting hose is sleeved on the periphery of the grouting plug and conveys grout into the grouting plug.

2. The modular slip casting anchor head of claim 1, wherein said anchor head body is tapered at a forward end thereof and has a plurality of inverted tooth-like friction pads disposed on an outer periphery thereof along a length direction thereof for preventing the anchor head from backing.

3. The modular grouting anchor head of claim 1, wherein the anchor head body is further provided at the outer periphery of the front end thereof with a plurality of axially-distributed grout holes for grout to flow out, and a grout stop is provided at the front end of each grout hole for enabling grout to flow backward.

4. The modular grouting anchor head of claim 1, wherein the grouting plug is configured to achieve front end limiting by the front end surface of the outer circumferential protrusion cooperating with the stop of the inner stop-in table of the anchor head body, and to achieve rear end limiting by the stop-in cooperation of the rear end surface of the outer circumferential protrusion and the front end surface of the grouting anchor fixedly assembled with the rear end of the anchor head body.

5. The modular slip casting anchor head of claim 4, wherein said slip casting hose is compressed around the periphery of said slip casting plug by said slip casting anchor, and said slip casting plug is further provided with barbed threads for enhancing the tensile strength of said slip casting hose.

6. The modular slip casting anchor head of claim 1, wherein said anchor head body is made of a flexible plastic having elasticity.