阅读说明：本技术 一种用于超长锚索深孔孔底安装的辅助装置及其安装方法 (Auxiliary device for mounting hole bottom of deep hole of ultra-long anchor cable and mounting method thereof ) 是由 印长俊 龚航里 廖国荣 于 2020-07-02 设计创作，主要内容包括：本发明公开了一种用于超长锚索深孔孔底安装的辅助装置,包括锚固端、牵引端,锚固端为一倒圆台形锚固杆,牵引端包括滑轮,滑轮通过滑轮转轴与滑轮固定基座转动连接,滑轮固定基座固定连接在锚固端顶部,滑轮固定基座与锚固端连接端呈圆柱形,表面设置有与空心钻杆端部内壁的内螺纹相匹配的外螺纹。其安装方法包括：采用两种不同孔径的钻杆进行钻孔,形成大孔径的锚索孔和小孔径的锚固孔；往锚固孔中注入静力破碎剂,使锚固孔周围岩土形成静力爆破扩孔区；沿锚固孔注入锚固剂,将附上牵引绳的超长锚索深孔孔底安装辅助装置送入锚固孔中。本发明通过将锚索安装由传统的孔口推送改为孔底反向牵引的方式,具有高效施工、结构安全等优点。(The invention discloses an auxiliary device for mounting the bottom of a deep hole of an ultra-long anchor cable, which comprises an anchoring end and a traction end, wherein the anchoring end is an inverted-truncated-cone-shaped anchoring rod, the traction end comprises a pulley, the pulley is rotatably connected with a pulley fixing base through a pulley rotating shaft, the pulley fixing base is fixedly connected to the top of the anchoring end, the connecting end of the pulley fixing base and the anchoring end is cylindrical, and the surface of the pulley fixing base is provided with an external thread matched with an internal thread on the inner wall of the end part of a hollow drill rod. The installation method comprises the following steps: drilling holes by adopting two drill rods with different apertures to form anchor cable holes with large apertures and anchor holes with small apertures; injecting a static crushing agent into the anchoring hole to enable rock soil around the anchoring hole to form a static blasting hole expanding area; and injecting an anchoring agent along the anchoring hole, and sending the auxiliary device for mounting the hole bottom of the deep hole of the ultra-long anchor cable with the traction rope into the anchoring hole. The anchor cable is installed in a mode of changing traditional orifice pushing into hole bottom reverse traction, and the anchor cable traction device has the advantages of high-efficiency construction, safe structure and the like.)

1. The utility model provides an auxiliary device that is used for overlength anchor rope deep hole bottom to install which characterized in that: the auxiliary device (5) consists of an anchoring end (51) and a traction end (50), wherein the anchoring end (51) is an inverted frustum-shaped anchoring rod, and the cross section size of the bottom of the anchoring rod is larger than that of the top of the anchoring rod; the traction end (50) comprises a pulley fixing base (501), a pulley (502) and a pulley rotating shaft (504), wherein the pulley (502) is rotatably connected with the pulley fixing base (501) through the pulley rotating shaft (504); pulley fixed baseplate (501) fixed connection is at anchor end (51) top, and the diameter of pulley fixed baseplate (501) and anchor end (51) all is slightly less than anchor hole (2) aperture.

2. The auxiliary device for deep hole bottom installation of the ultra-long anchor cable according to claim 1, wherein: the pulley fixing device is characterized by further comprising a hollow drill rod, wherein an internal thread is arranged on the inner wall of the end portion of the hollow drill rod, the connecting end of the pulley fixing base (501) and the anchoring end (51) is cylindrical, and an external thread matched with the thread of the inner wall of the end portion of the hollow drill rod is arranged on the surface of the pulley fixing base.

3. The auxiliary device for deep hole bottom installation of the ultra-long anchor cable according to claim 1, wherein: uneven rough grooves are formed in the surface of the anchoring end (51).

4. The auxiliary device for deep hole bottom installation of the ultra-long anchor cable according to claim 1, wherein: the traction end (50) further comprises a pulley clamping seat (503), and the pulley clamping seat (503) is arranged on two sides of the pulley (502) and used for limiting the pulley (502) to swing left and right.

5. An auxiliary device for deep hole bottom installation of an ultra-long anchor cable according to any one of claims 1-4, wherein: the anchoring end (51) of the auxiliary device (5) is fixed in the anchoring hole (2) through an anchoring agent, the traction rope (4) is connected to the hole opening of the anchor rope hole (1) by bypassing the pulley (502), one end of the traction rope (4) is connected with the end of the anchor rope, and the other end of the traction rope is connected with external power equipment or manpower.

6. The mounting method of the auxiliary device for mounting the deep hole bottom of the overlong anchor cable is characterized by comprising the following steps of: the method comprises the following construction steps:

firstly, drilling holes by adopting two drill rods with different apertures, firstly drilling holes by adopting a large-aperture drill rod to the designed hole depth position of the anchor cable hole to form an anchor cable hole (1), and then continuously drilling forwards to a certain depth along the designed hole depth position of the anchor cable hole by adopting a small-aperture drill rod to form an anchor hole (2);

secondly, injecting a static crushing agent into the anchoring hole (2), and utilizing the solidification expansion force of the static crushing agent to crush partial rock soil on the wall of the hole, so that the rock soil around the anchoring hole (2) is crushed to form a static blasting hole expanding area (3);

then, injecting an anchoring agent along the anchoring hole (2), sending the auxiliary device (5) for mounting the deep hole bottom of the ultra-long anchor cable with the traction rope (4) attached to the deep hole into the anchoring hole (2) by adopting a hollow drill rod, firmly anchoring the anchoring rod of the auxiliary device (5) and the crushed rock soil layer of the static blasting reaming region (3) under the action of the anchoring agent, and connecting the two ends of the traction rope bypassing the pulley to the orifice position of the anchor cable;

and finally, fixing a plurality of anchor cables into a bundle, connecting one end of the traction rope (4) with the end of the anchor cable, connecting the other end of the traction rope (4) with external power equipment or manpower by bypassing the pulley (502), contracting the traction rope (4) by controlling the external power equipment or the manpower, and bypassing the pulley (502) to ensure that the traction rope (4) directly pulls the plurality of anchor cables fixed into the bundle to the designed hole depth position of the anchor cable hole (1) along the anchor cable hole (1).

7. The method for installing the auxiliary device for deep hole bottom installation of the ultra-long anchor cable according to claim 6, wherein the method comprises the following steps: the relation between the diameter of the anchor cable hole (1) and the diameter of the anchor hole (2) D is D = (1/2-1/3) D, and the drilling depth of the anchor hole (2) is about 10D.

Technical Field

The invention belongs to the technical field of civil engineering construction, and particularly relates to an auxiliary device for mounting a deep hole bottom of an ultra-long anchor cable and a mounting method thereof.

Background

Along with the continuous increase of highway and railway mileage in China, more and more projects need to be constructed under the condition of complex landform, the anchor cable technology is widely applied to geotechnical engineering reinforcement, and the prior method generally adopts manual labor to lay cables at an orifice position. And moreover, due to the fact that the rebound force is large in the installation process of the large anchor cable, workers can be easily pushed down the scaffold by the rebound force of the anchor cable without enough protection measures, and casualty accidents are caused.

The existing hole bottom reverse traction technology is poor in construction stability, the technical problems that a hole bottom device is fixed and not firm and the like easily occur, the anchoring length of an anchor rod anchor cable is increased on the premise that the reasonable pore diameter is poor, the installation difficulty of site construction is increased, the installation speed is influenced, and the construction quality cannot be guaranteed.

Disclosure of Invention

In order to solve the technical problem of construction, the invention provides an auxiliary device for mounting the deep hole bottom of an ultra-long anchor cable and a mounting method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme: an auxiliary device for mounting the bottom of a deep hole of an ultra-long anchor cable comprises an anchoring end and a traction end, wherein the anchoring end is an inverted frustum-shaped anchoring rod, and the cross section size of the bottom of the anchoring rod is larger than that of the top of the anchoring rod; the traction end comprises a pulley fixing base, a pulley and a pulley rotating shaft, and the pulley is rotatably connected with the pulley fixing base through the pulley rotating shaft; the pulley fixed baseplate is fixedly connected to the top of the anchoring end, and the diameters of the pulley fixed baseplate and the anchoring end are slightly smaller than the aperture of the anchoring hole.

Further, still include hollow drill rod, hollow drill rod's tip inner wall is equipped with the internal thread, pulley fixed baseplate and anchor end connection end are cylindrical, and the surface is equipped with the external screw thread with hollow drill rod tip inner wall screw thread assorted.

Further, the anchoring end surface is provided with rough grooves with unevenness.

Furthermore, the traction end further comprises a pulley clamping seat, and the pulley clamping seat is arranged on two sides of the pulley and used for limiting the left and right swinging of the pulley.

Furthermore, the anchoring end of the auxiliary device is fixed in the anchoring hole through an anchoring agent, the traction rope is connected to the orifice of the anchor rope hole by bypassing the pulley, one end of the traction rope is connected with the end of the anchor rope, and the other end of the traction rope is connected with external power equipment or manpower.

The invention also provides an installation method of the auxiliary device for the installation of the deep hole bottom of the ultra-long anchor cable, which comprises the following construction steps:

firstly, drilling holes by adopting two drill rods with different apertures, firstly drilling holes by adopting a large-aperture drill rod to the designed hole depth position of the anchor cable hole to form the anchor cable hole, and then continuously drilling forwards to a certain depth along the designed hole depth position of the anchor cable hole by adopting a small-aperture drill rod to form an anchoring hole;

secondly, injecting a static crushing agent into the anchoring hole, and utilizing the static crushing agent to solidify and expand force to crush partial rock soil on the wall of the hole, so that the rock soil around the anchoring hole is crushed to form a static blasting hole expanding area;

then, injecting an anchoring agent along the anchoring hole, sending the auxiliary device for mounting the hole bottom of the deep hole of the ultra-long anchor cable with the traction rope attached to the hole bottom into the anchoring hole by adopting a hollow drill rod, firmly anchoring the anchoring rod of the auxiliary device with a broken rock soil layer in the static blasting reaming area under the action of the anchoring agent, and connecting two ends of the traction rope bypassing the pulley to the orifice position of the anchor cable;

and finally, fixing a plurality of anchor cables into a bundle, connecting one end of the traction rope with the anchor cable end, connecting the other end of the traction rope with external power equipment or manpower by bypassing the pulley, contracting the traction rope by controlling the external power equipment or the manpower, and enabling the traction rope to pull the plurality of anchor cables fixed into the bundle to the designed hole depth position of the anchor cable hole along the first straight pull of the anchor cable hole by bypassing the pulley.

Further, the relation between the diameter of the anchor cable hole D and the diameter of the anchor hole D is D = (1/2-1/3) D, and the drilling depth of the anchor hole is about 10D.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the anchor cable deep hole bottom mounting auxiliary device, the anchor holes, the anchoring agent and the broken rock soil layer in the static blasting hole expanding area act together, so that the anchor cable deep hole bottom mounting auxiliary device is firmer, the technical problems of poor construction stability, unfirm hole bottom auxiliary device fixing and the like are solved, the mounting speed is improved, and the construction quality is guaranteed;

2. according to the invention, the traditional orifice pushing mode is changed into the hole bottom reverse traction mode in the anchor cable installation process, so that the adverse factors of the anchor cable such as incomplete cable descending, severe prestress loss caused by anchor cable torsion and the like are avoided.

Drawings

Fig. 1 is a front view of an auxiliary device for deep hole bottom installation of an ultra-long anchor cable according to the invention;

FIG. 2 is a top view of the auxiliary device for deep hole bottom installation of an ultra-long anchor cable according to the present invention;

FIG. 3 is a schematic installation diagram of the auxiliary device for deep hole bottom installation of the ultra-long anchor cable according to the invention;

the labels in the figure are: the anchor cable hole-expanding device comprises 1-anchor cable hole, 2-anchoring hole, 3-static blasting hole-expanding area, 4-traction rope, 5-auxiliary device installed at the bottom of anchor cable deep hole, 50-traction end, 501-pulley fixing base, 502-pulley, 503-pulley clamping seat, 504-pulley rotating shaft and 51-anchoring end.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.