阅读说明：本技术 一种切断并拔除临近基坑锚索锚杆的方法 (Method for cutting off and pulling out anchor cable and anchor rod close to foundation pit ) 是由 任磊 黄春晖 葛梦溪 朱韶彬 田国立 侯献良 武浩 刘子辉 王晓睿 王飞 于 2021-04-22 设计创作，主要内容包括：本发明公开了一种切断并拔除临近基坑锚索锚杆的方法,包括如下步骤：S1,根据周边锚索锚杆基础资料,并结合物探,明确锚索锚杆具体位置与走向；S2,采用旋挖钻头钻孔,待钻至锚索位置,提出旋挖钻头,形成切割拔除钻孔；S3,将切割拔除机械头下放入切割拔除钻孔内,至锚索位置,控制高强度合金钢上刀盘与高强度合金钢下刀盘张开,将锚索锚杆勾入并咬紧已经勾住的锚索锚杆；S4,开启第二特种高强度合金钢电动切割机具的电动机切断锚索锚杆；S5,提升切割拔除机械头,把残余锚索锚杆拉出切割拔除钻孔。本发明切断并拔除临近基坑锚索锚杆的方法,可以有效切断并拨出锚索和锚杆,耗时少,耗能小,高效可靠。(The invention discloses a method for cutting off and pulling out an anchor cable and an anchor rod close to a foundation pit, which comprises the following steps: s1, determining the concrete position and direction of the anchor rod of the anchor cable according to the basic data of the anchor rod of the peripheral anchor cable and by combining geophysical prospecting; s2, drilling a hole by adopting a rotary drilling bit, and after the hole is drilled to the anchor cable position, lifting the rotary drilling bit to form a cutting and pulling hole; s3, placing the cutting and pulling mechanical head into the cutting and pulling drill hole until the anchor cable position, controlling the high-strength alloy steel upper cutter disc and the high-strength alloy steel lower cutter disc to open, and hooking and clenching the hooked anchor cable anchor rod; s4, starting a motor of a second special high-strength alloy steel electric cutting machine to cut off the anchor cable and the anchor rod; and S5, lifting the cutting and pulling mechanical head, and pulling the residual anchor cable bolt out of the cutting and pulling drill hole. The method for cutting off and pulling out the anchor cables and the anchor rods close to the foundation pit can effectively cut off and pull out the anchor cables and the anchor rods, and is low in time consumption, low in energy consumption, efficient and reliable.)

1. The utility model provides a cutting plucks mechanical head which characterized in that: the cutting machine comprises a base, a first special high-strength alloy steel electric cutting machine tool and a second special high-strength alloy steel electric cutting machine tool; the upper part of the base is connected with a lifting mechanism and an electrical control device, and a first special high-strength alloy steel electric cutting machine and a second special high-strength alloy steel electric cutting machine are arranged on a mounting plate at the lower part of the base;

the first special high-strength alloy steel electric cutting machine and the second special high-strength alloy steel electric cutting machine respectively comprise an electric machine control rod, a motor, a rotating bearing, a rotating disk back gear, a high-strength alloy steel upper cutter head and a high-strength alloy steel lower cutter head; the electric machine tool control rod is fixed on the mounting plate at the lower part of the base, a control circuit is arranged in the electric machine tool control rod, one end of the control circuit is connected with the electric control equipment, and the other end of the control circuit is connected with the motor;

the motor and the rotating bearing are arranged on a control rod of the electric machine tool, and the motor drives a back gear of the rotating disk arranged on the rotating bearing to rotate; the back gear of the rotating disc is meshed with the back gear of the high-strength alloy steel upper cutter disc, and the back gear of the rotating disc drives the back gear of the high-strength alloy steel upper cutter disc to rotate through meshing so as to drive the high-strength alloy steel upper cutter disc to rotate relative to the high-strength alloy steel lower cutter disc.

2. The mechanical head for cutting and extracting according to claim 1, wherein: the high-strength alloy steel upper cutter disc is hinged with the high-strength alloy steel lower cutter disc through a high-strength bolt, the high-strength bolt is installed on a base lower portion installation plate, the high-strength alloy steel lower cutter disc is fixed on the base lower portion installation plate, the high-strength alloy steel upper cutter disc can rotate around the high-strength bolt, and stopping safety pins are arranged at two ends of a gear on the back of the high-strength alloy steel upper cutter disc; the inner sides of the high-strength alloy steel upper cutter disc and the high-strength alloy steel lower cutter disc are both provided with arc-shaped edging, and the arc-shaped radius of the edging in the high-strength alloy steel upper cutter disc is larger than that of the edging in the high-strength alloy steel lower cutter disc.

3. The utility model provides a method for cut off and pull out near foundation ditch anchor rope stock, adopts above-mentioned cutting to pull out mechanical head which characterized in that: the method comprises the following steps: s1, determining the concrete position and direction of the anchor rod of the anchor cable according to the basic data of the anchor rod of the peripheral anchor cable and by combining geophysical prospecting;

s2, drilling a hole by adopting a rotary drilling bit, and after the hole is drilled to the anchor cable position, lifting the rotary drilling bit to form a cutting and pulling hole;

s3, the cutting and pulling mechanical head is placed into the cutting and pulling drill hole to reach the position of an anchor cable, two motors of a first special high-strength alloy steel electric cutting tool and a second special high-strength alloy steel electric cutting tool are controlled to drive a back gear of a rotating disc to rotate, a high-strength alloy steel upper cutter disc is driven to rotate away from a high-strength alloy steel lower cutter disc, the high-strength alloy steel upper cutter disc and the high-strength alloy steel lower cutter disc are opened, and the two motors are closed; hooking the anchor cable anchor rod between a high-strength alloy steel upper cutter disc and a high-strength alloy steel lower cutter disc, controlling two motors to drive a back gear of a rotating disc to rotate, driving the high-strength alloy steel upper cutter disc to rotate close to the high-strength alloy steel lower cutter disc, biting the hooked anchor cable anchor rod, and closing the two motors;

s4, lifting the cutting and pulling mechanical head to a state that the anchor cable and the anchor rod are tensioned, starting a motor of a second special high-strength alloy steel electric cutting machine, continuously driving a high-strength alloy steel upper cutter disc to rotate close to a high-strength alloy steel lower cutter disc until the anchor cable and the anchor rod are cut off, and closing the motor of the second special high-strength alloy steel electric cutting machine;

and S5, lifting the cutting and pulling mechanical head, wherein the lifting tension is greater than the anchoring force of the rest anchor cable, the anchoring section gradually loosens, and the rest anchor cable anchor rod is pulled out of the cutting and pulling drill hole by a first special high-strength alloy steel electric cutting machine.

4. The method of cutting and extracting anchor bolts adjacent to a foundation pit of claim 3, wherein: and 3, hooking the anchor cable by using a movable bolt hook, and lifting upwards to hook the anchor cable anchor rod between the high-strength alloy steel upper cutter disc and the high-strength alloy steel lower cutter disc.

5. The method of cutting and extracting anchor bolts adjacent to a foundation pit of claim 3, wherein: and in the process of cutting the anchor rope and the anchor rod by the second special high-strength alloy steel electric cutting machine in the step 4, repeatedly lifting, cutting and removing the mechanical head, and judging that the anchor rope and the anchor rod are sheared by reducing the lifting resistance.

Technical Field

The invention relates to the technical field of tunnel construction, in particular to a method for cutting off and removing anchor cables and anchor rods near a foundation pit.

Background

In recent years, with the vigorous development of subway construction, more and more subway stations and shield sections are built in the urban core area. The city core area has a large number of buildings such as residential buildings, city complexes, cultural exhibition centers and the like, the foundation pit of the buildings is deep, and the supporting scheme usually adopts pile-anchor support. In order to provide sufficient lateral resistance, the pile-anchor supporting structure is long in anchor cable length, often enters the construction range of subway stations and shield zones, and has very adverse effects on subway open cut foundation pits and shield tunnels.

Before the construction of a subway station foundation pit and an interval shield, an anchor cable and an anchor rod which are invaded into the range of the foundation pit are often required to be cut off or pulled out, otherwise, the construction of the subway is seriously influenced. The existing common processing scheme is that an anchor cable and an anchor rod are twisted off by a rotary drilling rig, and the scheme is large in energy consumption, long in time consumption and large in influence on surrounding buildings.

Disclosure of Invention

In view of the above, the present invention provides a method for cutting and removing an anchor rod of an anchor cable near a foundation pit, which can effectively cut and remove the anchor cable and the anchor rod, and has the advantages of low time consumption, low energy consumption, high efficiency and reliability.

In order to achieve the purpose, the invention adopts the following technical scheme: a cutting and removing mechanical head comprises a base, a first special high-strength alloy steel electric cutting machine tool and a second special high-strength alloy steel electric cutting machine tool; the upper part of the base is connected with a lifting mechanism and an electrical control device, and a first special high-strength alloy steel electric cutting machine and a second special high-strength alloy steel electric cutting machine are arranged on a mounting plate at the lower part of the base;

the first special high-strength alloy steel electric cutting machine and the second special high-strength alloy steel electric cutting machine respectively comprise an electric machine control rod, a motor, a rotating bearing, a rotating disk back gear, a high-strength alloy steel upper cutter head and a high-strength alloy steel lower cutter head; the electric machine tool control rod is fixed on the mounting plate at the lower part of the base, a control circuit is arranged in the electric machine tool control rod, one end of the control circuit is connected with the electric control equipment, and the other end of the control circuit is connected with the motor;

the motor and the rotating bearing are arranged on a control rod of the electric machine tool, and the motor drives a back gear of the rotating disk arranged on the rotating bearing to rotate; the back gear of the rotating disc is meshed with the back gear of the high-strength alloy steel upper cutter disc, and the back gear of the rotating disc drives the back gear of the high-strength alloy steel upper cutter disc to rotate through meshing so as to drive the high-strength alloy steel upper cutter disc to rotate relative to the high-strength alloy steel lower cutter disc.

Furthermore, the high-strength alloy steel upper cutter disc is hinged with the high-strength alloy steel lower cutter disc through a high-strength bolt, the high-strength bolt is installed on the base lower portion installation plate, the high-strength alloy steel lower cutter disc is fixed on the base lower portion installation plate, the high-strength alloy steel upper cutter disc can rotate around the high-strength bolt, and the two ends of a back gear of the high-strength alloy steel upper cutter disc are provided with the backstop safety pins; the inner sides of the high-strength alloy steel upper cutter disc and the high-strength alloy steel lower cutter disc are both provided with arc-shaped edging, and the arc-shaped radius of the edging in the high-strength alloy steel upper cutter disc is larger than that of the edging in the high-strength alloy steel lower cutter disc.

A method for cutting off and removing anchor cables and anchor rods close to a foundation pit adopts the cutting and removing mechanical head, and comprises the following steps: s1, determining the concrete position and direction of the anchor rod of the anchor cable according to the basic data of the anchor rod of the peripheral anchor cable and by combining geophysical prospecting;

s2, drilling a hole by adopting a rotary drilling bit, and after the hole is drilled to the anchor cable position, lifting the rotary drilling bit to form a cutting and pulling hole;

s3, the cutting and pulling mechanical head is placed into the cutting and pulling drill hole to reach the position of an anchor cable, two motors of a first special high-strength alloy steel electric cutting tool and a second special high-strength alloy steel electric cutting tool are controlled to drive a back gear of a rotating disc to rotate, a high-strength alloy steel upper cutter disc is driven to rotate away from a high-strength alloy steel lower cutter disc, the high-strength alloy steel upper cutter disc and the high-strength alloy steel lower cutter disc are opened, and the two motors are closed; hooking the anchor cable anchor rod between a high-strength alloy steel upper cutter disc and a high-strength alloy steel lower cutter disc, controlling two motors to drive a back gear of a rotating disc to rotate, driving the high-strength alloy steel upper cutter disc to rotate close to the high-strength alloy steel lower cutter disc, biting the hooked anchor cable anchor rod, and closing the two motors;

s4, lifting the cutting and pulling mechanical head to a state that the anchor cable and the anchor rod are tensioned, starting a motor of a second special high-strength alloy steel electric cutting machine, continuously driving a high-strength alloy steel upper cutter disc to rotate close to a high-strength alloy steel lower cutter disc until the anchor cable and the anchor rod are cut off, and closing the motor of the second special high-strength alloy steel electric cutting machine;

and S5, lifting the cutting and pulling mechanical head, wherein the lifting tension is greater than the anchoring force of the rest anchor cable, the anchoring section gradually loosens, and the rest anchor cable anchor rod is pulled out of the cutting and pulling drill hole by a first special high-strength alloy steel electric cutting machine.

And further, in the step 3, the anchor cable is hooked by a movable bolt hook and lifted upwards, and the anchor cable anchor rod is hooked between the high-strength alloy steel upper cutter disc and the high-strength alloy steel lower cutter disc.

Further, in the process that the second special high-strength alloy steel electric cutting machine cuts the anchor rope and the anchor rod in the step 4, the mechanical head is repeatedly lifted, cut and removed, and the anchor rope and the anchor rod are judged to be cut off through reduction of lifting resistance.

The invention has the beneficial effects that:

the method is specially used for cutting and removing the existing anchor cables and anchor rods in the range of the shield interval, can effectively cut and remove the anchor cables and the anchor rods, prevents shield machinery cutter heads from being wound or mixed by the anchor cables to cause shield machine halt accidents during shield construction, and prevents the anchor cables in individual residual soil from being easily formed into mud cakes in front of the cutter heads, the rotation resistance of the shield machine is increased, and the energy consumption is increased.

The method for cutting off and pulling out the anchor cable and the anchor rod close to the foundation pit has the following advantages: 1) compared with the traditional process, the process has the advantages of less time consumption and less energy consumption.

2) After the cutting and pulling-out, the damage and winding of the cutter head of the shield machine can be greatly reduced, and the residual anchor cable is prevented from forming mud cakes in front of the cutter head.

3) The first special high-strength alloy steel electric cutting machine tool and the second special high-strength alloy steel electric cutting machine tool are integrated, the special high-strength alloy cutting machine tool can hold or cut off the anchor rope and the anchor rod, and the cutting tool is less in abrasion and can be repeatedly used.

4) The foundation pit is small for the existing foundation pit or building, and the disturbance to the surrounding building is small.

5) The shield structure has small influence on the shield structure area to be constructed, and reduces the construction risks of shield structure shutdown, shield structure settlement and deflection.

Drawings

FIG. 1 is a schematic structural view of a cutting and removing mechanical head according to the present invention;

FIG. 2 is a schematic structural view of a first special high-strength alloy steel electric cutting machine and a second special high-strength alloy steel electric cutting machine according to the present invention;

FIG. 3 is a diagram showing a state that a first special high-strength alloy steel electric cutting machine and a second special high-strength alloy steel electric cutting machine of the invention gradually approach each other and are tightly gripped;

FIG. 4 is a diagram showing a second special high-strength alloy steel electric cutting machine according to the present invention in a cutting state after approaching clenching;

FIG. 5 is a diagram of the state of the first special high-strength alloy steel electric cutting machine and the second special high-strength alloy steel electric cutting machine far away from the opening state.

Reference numerals: the cutting is pulled out and is bored 1, and the cutting is pulled out mechanical head 2, base 3, first special type high strength alloy steel electric cutting machine 4, second special type high strength alloy steel electric cutting machine 5, electrical control equipment 6, anchor rope stock 7, electric machine control lever 8, motor 9, swivel bearing 10, rotary disk back gear 11, cutter head back gear 12 on the high strength alloy steel, cutter head 13 on the high strength alloy steel, cutter head 14 under the high strength alloy steel.

Detailed Description

The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.

Example 1

A cutting and removing mechanical head comprises a base 3, a first special high-strength alloy steel electric cutting machine 4 and a second special high-strength alloy steel electric cutting machine 5. The upper part of the base 3 is connected with a lifting mechanism and an electrical control device 6, and a first special high-strength alloy steel electric cutting machine 4 and a second special high-strength alloy steel electric cutting machine 5 are installed on a mounting plate at the lower part of the base 3.

The first special high-strength alloy steel electric cutting machine 4 and the second special high-strength alloy steel electric cutting machine 5 respectively comprise an electric machine control rod 8, a motor 9, a rotary bearing 10, a rotary disc back gear 11, a high-strength alloy steel upper cutter disc back gear 12, a high-strength alloy steel upper cutter disc 13 and a high-strength alloy steel lower cutter disc 14. The electric machine control rod 8 is fixed on the mounting plate at the lower part of the base 3, a control circuit is arranged in the electric machine control rod 8, one end of the control circuit is connected with the electric control equipment 6, and the other end of the control circuit is connected with the motor 9.

The motor 9 and the slewing bearing 10 are mounted on the electric implement control lever 8, and the motor 9 drives the slewing ring back gear 11 mounted on the slewing bearing 10 to rotate. The rotating disc back gear 11 is meshed with the high-strength alloy steel upper cutter disc back gear 12, and the rotating disc back gear 11 drives the high-strength alloy steel upper cutter disc back gear 12 to rotate through meshing, so that the high-strength alloy steel upper cutter disc 13 is driven to rotate relative to the high-strength alloy steel lower cutter disc 14.

In the embodiment, the first special high-strength alloy steel electric cutting tool 4 and the second special high-strength alloy steel electric cutting tool 5 are formed by combining a high-strength alloy cutter and an electric tool, and the high-strength alloy steel upper cutter 13 is pushed to rotate towards the high-strength alloy steel lower cutter 14 or to rotate away from the high-strength alloy steel lower cutter 14 by utilizing the mutual meshing of the rotary disk back gear 11 on the electric tool control rod 8 and the high-strength alloy steel upper cutter back gear 12.

Example 2

The present embodiment is different from embodiment 1 in that: the high-strength alloy steel upper cutter disc 13 is hinged to the high-strength alloy steel lower cutter disc 14 through a high-strength bolt, the high-strength bolt is installed on a mounting plate on the lower portion of the base 3, the high-strength alloy steel lower cutter disc 14 is fixed on the mounting plate on the lower portion of the base 3, the high-strength alloy steel upper cutter disc 13 can rotate around the high-strength bolt, and the stopping safety pins are arranged at two ends of a gear 12 on the back of the high-strength alloy steel upper cutter disc and limit the rotation angle.

The inboard of blade disc 14 all sets up arc edging under high strength alloy steel top cutter disc 13 and the high strength alloy steel, the arc radius of edging in high strength alloy steel top cutter disc 13 is greater than the arc radius of edging in high strength alloy steel blade disc 14, be convenient for bite tightly and cut the anchor rope stock, outer arc turning moment produces huge inner arc cutting force under the same turning moment, utilize inner arc cutting force to make first special high strength alloy steel electric cutting machine 4 and second special high strength alloy steel electric cutting machine 5 bite tightly or cut off the anchor rope stock.

Example 3

A method for cutting off and pulling out anchor bolts of anchor cables close to a foundation pit comprises the following steps: s1, determining the concrete position and direction of the anchor rod of the anchor cable according to the basic data of the anchor rod of the peripheral anchor cable and by combining geophysical prospecting;

s2, drilling a hole by adopting a rotary drilling bit, and after the hole is drilled to the anchor cable position, lifting the rotary drilling bit to form a cutting and removing drilling hole 1;

s3, the cutting and pulling mechanical head 2 is placed into the cutting and pulling drill hole 1 to reach the position of an anchor cable, two motors 9 of a first special high-strength alloy steel electric cutting tool 4 and a second special high-strength alloy steel electric cutting tool 5 are controlled to drive a back gear of a rotating disc to rotate, a high-strength alloy steel upper cutter disc 13 is driven to rotate away from a high-strength alloy steel lower cutter disc 14, the high-strength alloy steel upper cutter disc 13 and the high-strength alloy steel lower cutter disc 14 are opened, and the two motors 9 are closed; hooking the anchor cable anchor rod between a high-strength alloy steel upper cutter disc 13 and a high-strength alloy steel lower cutter disc 14, controlling two motors 9 to drive a back gear of a rotating disc to rotate, driving the high-strength alloy steel upper cutter disc 13 to rotate close to the high-strength alloy steel lower cutter disc 14, biting the hooked anchor cable anchor rod, and closing the two motors 9;

s4, lifting the cutting and pulling-out mechanical head 2 to a state that an anchor cable and an anchor rod are tensioned, starting a motor 9 of a second special high-strength alloy steel electric cutting machine 5, continuously driving a high-strength alloy steel upper cutter disc to be close to a high-strength alloy steel lower cutter disc to rotate until the anchor cable and the anchor rod are cut off, and closing the motor 9 of the second special high-strength alloy steel electric cutting machine 5;

and S5, lifting the cutting and pulling-out mechanical head 2, wherein the lifting tension is greater than the anchoring force of the residual anchor cable, the anchoring section is gradually loosened, and the residual anchor cable anchor rod is pulled out of the cutting and pulling-out drill hole 1 through the first special high-strength alloy steel electric cutting machine 4.

In this embodiment, the first special high-strength alloy steel electric cutting tool 4 and the second special high-strength alloy steel electric cutting tool 5 belong to electric parallel control, the first special high-strength alloy steel electric cutting tool 4 is used for clenching the anchor cable, and the second special high-strength alloy steel electric cutting tool 5 is used for cutting the anchor cable. The first special high-strength alloy steel electric cutting machine 4 is small in rotation angle and small in torque, and is mainly used for tightly biting an anchor cable and an anchor rod. The second special high-strength alloy steel electric cutting machine 5 is large in rotation angle and large in torque, and can cut the anchor cable and the anchor rod after being gripped.

Example 4

The present embodiment is different from embodiment 3 in that: in the step 3, the anchor cable is hooked by a movable bolt hook and lifted upwards, and the anchor cable anchor rod is hooked between the high-strength alloy steel upper cutter disc 13 and the high-strength alloy steel lower cutter disc 14. The direction and height of the movable bolt hook can be controlled manually.

Example 5

The present embodiment is different from embodiment 3 in that: in the process that the second special high-strength alloy steel electric cutting machine 5 cuts the anchor rope and the anchor rod in the step 4, the mechanical head 2 is repeatedly lifted, cut and removed, and the anchor rope and the anchor rod are judged to be cut off through reduction of lifting resistance.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.