阅读说明：本技术 一种摆喷水泥土墙钻头及其施工方法 (Pendulum water-spraying soil-cement wall drill bit and construction method thereof ) 是由 易娟 王建军 胡宝山 刘喜林 李家红 于 2020-06-19 设计创作，主要内容包括：本发明公开了一种摆喷水泥土墙钻头及其施工方法,其特点是钻杆与钻头的对接部位设有液压油缸,所述钻头由第二转轴与中心轴铰接；所述水泥浆管、水管、和压缩空气管均为软管,在钻杆与钻头对接处的外部设有伸缩软管连接；所述液压油缸固定设置在钻杆上,其推杆顶端设有第一转轴与钻头铰接；所述液压油缸由连接的油路管道驱动推杆,使钻头左、右摆动,同时钻头的喷射孔水平喷浆,且喷浆方向与摆动方向垂直。本发明与现有技术相比具有根据摆动的角度来控制水泥土墙的厚度,以及调节喷浆压力控制单幅止水帷幕的长度,减少搭接接头和工程费用,有效提高泥土桩(墙)的刚度,缩短施工周期,进一步提高施工质量。(The invention discloses a pendulum water-spraying soil-soil wall drill bit and a construction method thereof, and is characterized in that a hydraulic oil cylinder is arranged at the butt joint part of a drill rod and the drill bit, and the drill bit is hinged with a central shaft through a second rotating shaft; the cement slurry pipe, the water pipe and the compressed air pipe are hoses, and a flexible hose is arranged outside the butt joint of the drill rod and the drill bit for connection; the hydraulic oil cylinder is fixedly arranged on the drill rod, and the top end of a push rod of the hydraulic oil cylinder is provided with a first rotating shaft which is hinged with the drill bit; the hydraulic oil cylinder drives the push rod through a connected oil pipeline to enable the drill bit to swing left and right, and meanwhile, the spraying hole of the drill bit is sprayed with slurry horizontally, and the slurry spraying direction is perpendicular to the swinging direction. Compared with the prior art, the invention controls the thickness of the cement soil wall according to the swing angle, adjusts the guniting pressure to control the length of the single waterproof curtain, reduces lap joints and engineering cost, effectively improves the rigidity of the soil pile (wall), shortens the construction period and further improves the construction quality.)

1. A pendulum water spraying clay wall drill bit comprises a central shaft, a cement slurry pipe channel, a cement slurry pipe, a water pipe channel, a compressed air pipe and a drill bit arranged at the bottom of a drill rod, wherein the central shaft, the cement slurry pipe channel, the cement slurry pipe, the water pipe channel, the compressed air pipe channel and the compressed air pipe are arranged in the drill rod; the cement slurry pipe, the water pipe and the compressed air pipe are hoses, and a flexible hose is arranged outside the butt joint of the drill rod and the drill bit; the hydraulic oil cylinder is fixedly arranged on the drill rod, and the top end of a push rod of the hydraulic oil cylinder is provided with a first rotating shaft which is hinged with the drill bit; the hydraulic oil cylinder drives the push rod through a connected oil pipeline to enable the drill bit to swing left and right, and meanwhile, the spraying hole in the drill bit is horizontal spraying, and the spraying direction is perpendicular to the swinging direction.

2. The pendulum-type water-spraying cement wall drill bit as claimed in claim 1, wherein the joint of the end of the drill bit, the central shaft and the hydraulic cylinder is provided with a lifting lug.

3. The construction method of the pendulum water injection clay wall drill bit of claim 1 is characterized in that the construction method comprises the following steps:

drilling machine in position

Drilling a hole by adopting a geological drilling machine, and mounting the drilling machine on a designed hole position to enable the axis of a drill rod to be vertically aligned with the center position of the drilled hole;

(II) lower drill rod

Inserting a drill rod into the formed hole, and enabling a drill head of the drill rod to jet water and sink at the same time until the drill rod is inserted to the designed depth;

(III) pressure test of equipment

When the drill rod is inserted into the designed depth, clear water pressure test is carried out, and grouting operation can be carried out after the inspection equipment and the pipeline are normal;

(IV) high-pressure grouting

Stirring the grout according to a designed proportion, lifting a drill rod to perform high-pressure grouting operation, and simultaneously starting a hydraulic oil cylinder to enable a drill bit to continuously swing and spray the grout from bottom to top, wherein the swing amplitude is set according to the thickness of the cement soil wall;

(V) swinging and spraying first cement-soil wall

After the guniting is carried out to the designed height, the drill rod is pulled out to finish the guniting;

(VI) washing

After the drill rod is lifted to the designed elevation, the construction of the first pendulum water-spraying clay wall is finished, and then the grouting pipe and the equipment thereof are washed;

(VII) pendulum spraying of subsequent cement-soil wall

And (3) moving the drilling machine equipment to a new hole position, repeating the step (one) to the step (six), and sequentially finishing the second step, the third step, the.

Technical Field

The invention relates to the technical field of pile foundations and drilling machines, in particular to a construction drill bit for swinging a water-spraying clay wall and a construction method thereof.

Background

At present, the construction of conventional soil cement stake (wall) generally all adopts the biax stirring stake, the triaxial stirring stake, double round mills stirring wall etc. these soil cement stake (wall) are formed by a plurality of circular stake or by the overlap joint of rectangle stake, because soil cement stake (wall) thickness difference need change the drill bit or wash the wheel, some overlap joint can be more, influence the construction quality of soil cement stake, the effective thickness of soil cement stake for guaranteeing the soil cement stake of forming by a plurality of circle overlap joints, need increase single circle diameter, cause certain cement material extravagant, make engineering cost high, the period of operation is long.

Disclosure of Invention

The invention aims to provide a construction drill bit for pendulum-type water-spraying soil-earth walls and a construction method thereof aiming at the defects of the prior art, the pendulum-type water-spraying soil-earth wall construction drill bit structure is adopted, the hydraulic oil cylinder is arranged at the bottom of a drill rod, the pendulum-type water-spraying soil-earth wall construction is carried out on the soil body perpendicular to the left and right sides of the drill rod, the thickness of the soil-earth wall is controlled according to the swinging angle, the length of a single cement-earth wall is adjusted according to the pressure, lap joints are reduced, the rigidity of a cement-earth pile (wall) is increased, not only is the construction quality improved, but also the cement paste is saved, the time for changing the drill bit due to different thicknesses of the cement-earth.

The purpose of the invention is realized as follows: a pendulum water spraying clay wall drill bit comprises a central shaft, a cement slurry pipe channel, a cement slurry pipe, a water pipe channel, a compressed air pipe and a drill bit arranged at the bottom of a drill rod, wherein the central shaft, the cement slurry pipe channel, the cement slurry pipe, the water pipe channel, the compressed air pipe channel and the compressed air pipe are arranged in the drill rod; the cement slurry pipe, the water pipe and the compressed air pipe are hoses, and a flexible hose is arranged outside the butt joint of the drill rod and the drill bit for connection; the hydraulic oil cylinder is fixedly arranged on the drill rod, and the top end of a push rod of the hydraulic oil cylinder is provided with a first rotating shaft which is hinged with the drill bit; the hydraulic oil cylinder drives the push rod through a connected oil pipeline, so that the drill bit swings left and right, the jet holes formed in the drill bit are horizontal in guniting, and the guniting direction of the jet holes is perpendicular to the swinging direction.

And a lifting lug is arranged at the joint of the end part of the drill bit, the central shaft and the hydraulic oil cylinder.

A construction method of a pendulum water-spraying soil-earth wall drill bit is characterized by comprising the following steps:

drilling machine in position

And drilling by adopting a geological drilling machine, and mounting the drilling machine on a designed hole position to enable the axis of a drill rod to be vertically aligned with the center of a drill hole.

(II) lower drill rod

After drilling, the drill rod and the drill bit for swinging the water-spraying clay wall are inserted to the designed depth, and in the process of lowering the drill rod, the drill bit can jet water and sink to prevent the nozzle from being blocked by the sand.

(III) pressure test of equipment

When the drill rod is inserted into the designed depth, clean water pressure test is carried out, and grouting operation can be carried out after the normal inspection equipment and the pipeline.

(IV) high-pressure grouting

After the grout is stirred according to the design proportion, the drill rod is lifted to perform high-pressure grouting operation, and meanwhile, the hydraulic oil cylinder is started, so that the drill bit continuously swings and sprays grout from bottom to top, and the swing amplitude is set according to the thickness of the cement soil wall.

(V) swinging and spraying first cement-soil wall

And after the guniting is carried out to the designed height, pulling out the drill rod to finish the guniting.

(VI) washing

And after the drill rod is lifted to the designed elevation, the construction of the first pendulum water-spraying clay wall is finished, and then the grouting pipe and the equipment thereof are washed.

(VII) pendulum spraying of subsequent cement-soil wall

And (3) moving the drilling machine equipment to a new hole position, repeating the step (one) to the step (six), and sequentially finishing the second step, the third step, the.

Compared with the prior art, the invention has the advantages that the thickness of the cement-soil wall is controlled according to the swinging angle, the length of the single waterproof curtain can be adjusted by the construction drill according to the pressure, the lap joints are reduced, the construction quality of the cement-soil wall is effectively improved, the rigidity of the cement-soil pile (wall) is increased, the cement paste is saved, the engineering cost is reduced, the construction period is shortened, and the construction quality is further improved.

Drawings

FIG. 1 is a schematic view of a drill bit according to the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of a bit swing;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 1;

FIGS. 6 to 7 are schematic views of the structure of a pendulum-type water-spraying clay wall.

Detailed Description

Referring to attached drawings 1-2, the invention comprises a central shaft 1-1 arranged in a drill rod 1, a cement slurry pipe channel 8-1, a cement slurry pipe 8-2, a water pipe channel 9-1), a water pipe 9-2, a compressed air pipe channel 10-1, a compressed air pipe 10-2 and a drill bit 3 arranged at the bottom of the drill rod 1, wherein a hydraulic oil cylinder 5 is arranged at the butt joint part of the drill rod 1 and the drill bit 3; the drill bit 3 is hinged with the central shaft 1-1 through a second rotating shaft 7; the cement paste pipe 8-2, the water pipe 9-2 and the compressed air pipe 10-2 are hoses; the hydraulic oil cylinder 5 is fixedly arranged on the drill rod 1, and the top end of a push rod of the hydraulic oil cylinder is provided with a first rotating shaft 6 which is hinged with the drill bit 3; the drill rod 1 is provided with a butt joint screw hole 11.

Referring to the attached drawings 3-4, the hydraulic oil cylinder 5 drives the push rod through the connected oil pipeline 12 to enable the drill bit 3 to swing left and right, meanwhile, the spray hole 4 formed in the drill bit 3 is horizontal in a guniting direction, the guniting direction is perpendicular to the swinging direction, and the telescopic hose 2 is arranged outside the joint of the drill rod 1 and the drill bit 3.

Referring to the attached figure 5, lifting lugs 3-1 and 3-2 are arranged at the connection part of the end part of the drill bit 3, the central shaft 1-1 and the hydraulic oil cylinder 5.

The present invention will be further explained below by the swinging and spraying construction of the waterproof curtain.

Referring to the attached drawings 6-7, the invention carries out the swinging and spraying construction of the cement-soil wall according to the following steps:

1) positioning a drilling machine: the drilling machine is arranged on a designed hole position, so that the axis of a drill rod 1 of the drilling machine is vertically aligned with the center position of a drilled hole. The drilling method is various and mainly depends on the geological condition in the stratum, the water stop depth, the machine tool equipment and other conditions, and a geological drilling machine is generally adopted for drilling.

2) Drilling a drill rod: after the geological drilling machine is used for drilling, the drill rod 1 of the pendulum spraying drill bit 3 is inserted into a preset depth. In the process of drilling the drill rod, water can be injected and the drill rod can sink while preventing the nozzle from being blocked by the sand.

3) After the drill rod 1 is inserted into a preset depth, clear water pressure testing is carried out, and if the equipment and the pipeline are safe and normal, high-pressure grouting operation can be started.

4) High-pressure grouting: after the drill rod is inserted into a preset depth, the slurry is immediately stirred according to the designed mixing proportion, the drill rod 1 is lifted, the slurry is continuously sprayed from bottom to top, the hydraulic oil cylinder 5 is started while the slurry is sprayed, the drill bit 3 starts to swing, and the swing amplitude is controlled according to the required thickness of the waterproof curtain.

5) Pulling out the drill rod after the injection is finished: and after the guniting is carried out to the designed height, pulling out the drill rod 1 and finishing the guniting.

6) Washing: after the drill rod 1 is lifted to the designed elevation, the construction of the first pendulum water-spraying clay wall 13 is finished, and after the construction is finished, machines and tools such as grouting pipes are washed clean.

7) And moving machines and tools such as a drilling machine and the like to a new hole site, and repeating the steps 1) to 6) to finish the second swing water spraying clay wall 14 and the third swing water spraying clay wall 15 and … until all the cement soil walls are constructed, wherein the lap joint 16 is determined according to the perpendicularity and the wall depth.

The length of the single waterproof curtain can be adjusted according to the pressure, lap joints are reduced, the construction quality of the waterproof curtain is guaranteed, and construction cement slurry for the ultrathin ribbed waterproof curtain can be fully utilized. The invention is further described and not intended to be limited to the embodiments disclosed herein, but rather to be accorded the full scope and equivalents of the claims.