阅读说明：本技术 一种既有原位金属管井氧化腐蚀清障方法及装置 (Method and device for removing obstacles by oxidizing corrosion of existing in-situ metal tube well ) 是由 陈荣 赵文凯 张启铭 于 2019-11-19 设计创作，主要内容包括：本发明属于地下清障领域,尤其涉及一种既有原位金属管井氧化腐蚀清障方法及装置。本发明提供的既有原位金属管井氧化腐蚀清障方法及装置,通过对金属管井上部的覆土进行清除,使得金属管井的顶部暴露出土壤；通过腐蚀金属管井,使得金属管井疏松破碎后形成金属管井残留物,然后利用挖机挖土时一起挖出,完成清障作业,具有实用性,可操作性,通过原位腐蚀金属管井,使其质地疏松脱落后与挖土一起清除,减少使用振动沉拔桩机、旋挖钻机等相应设备震动及噪声,操作方便、快捷、安全,其所需材料和设备简单,成本较低,便于推广应用,解决了清除地下障碍物过程产生较大周边环境影响及较大生产费用等难题。(The invention belongs to the field of underground obstacle clearing, and particularly relates to an oxidation corrosion obstacle clearing method and device for an existing in-situ metal pipe well. According to the method and the device for removing the barriers by oxidizing and corroding the existing in-situ metal pipe well, the earth covering on the upper part of the metal pipe well is removed, so that the soil is exposed on the top of the metal pipe well; through corroding the tubular metal resonator well for the tubular metal resonator well is loose after broken and forms tubular metal resonator well residual, then utilize and dig out together when digging the native by the excavator, accomplish the operation of removing obstacles, and has the practicality, maneuverability, corrode the tubular metal resonator well through the normal position, clear away with digging after making its texture loose and take off together, reduce and use vibration pile driver, dig corresponding equipment vibrations and noise such as rig soon, convenient operation, swiftly, safety, its required material and equipment are simple, the cost is lower, and convenient for popularize and apply, solved and cleared away difficult problems such as the great all ring edge border influence of underground obstacle process production and great manufacturing cost.)

1. An oxidation corrosion barrier removing method for an existing in-situ metal tube well is characterized by comprising the following steps:

removing the covering soil on the upper part of the metal pipe well to expose the soil on the top of the metal pipe well;

corroding the metal pipe well;

and step three, corroding the metal pipe well until the metal pipe well is loosened and crushed to form metal pipe well residues, and digging out the metal pipe well residues together when the excavator is used for digging soil.

2. The method for removing the barrier in the existing in-situ metal tube well by oxidizing and corroding of the claim 1, further comprising a step four of sorting out the metal tube well residues in the excavated soil by an electromagnetic method.

3. The method for removing the barrier of the existing in-situ metal pipe well by oxidizing corrosion is characterized in that in the second step, seawater sand is filled in the metal pipe well, and the humidity of the seawater sand is greater than or equal to 65% and less than or equal to 85%.

4. The method for removing the barrier of the existing in-situ metal tube well by the oxidation corrosion is characterized in that in the second step, fresh water sand containing 3-4% by weight of sodium chloride is filled in the metal tube well, and the humidity of the fresh water sand is greater than or equal to 65% and less than or equal to 85%.

5. The method for removing the barrier in the existing in-situ metal pipe well by the oxidation corrosion according to claim 3 or 4, wherein the second step further comprises corroding the metal pipe well by an electrode accelerated corrosion method, wherein the electrode accelerated corrosion method is that a metal rod is inserted into the metal pipe well as used as a negative electrode, the metal pipe well is used as a positive electrode, and the metal rod and the metal pipe well are respectively connected with a power supply through leads.

6. The existing in-situ metal tube well oxidation corrosion barrier cleaning method of claim 1, wherein the outer diameter D of the metal tube well is less than 300mm, and the wall thickness is less than or equal to 4 mm.

7. The method for removing the barrier of the existing in-situ metal tube well by oxidation corrosion as claimed in claim 1, wherein in the first step, the soil is exposed to at least 10cm from the top of the metal tube well.

8. The utility model provides an existing normal position tubular metal resonator well oxidation corrosion barrier removal device which characterized in that, including fill in the marine sand in the tubular metal resonator well, insert and arrange metal rod and the power in the tubular metal resonator well, the power is connected through the pipe wall of wire and tubular metal resonator well and the upper end of metal rod respectively.

9. The existing in-situ metal tube well oxidation corrosion barrier cleaning device of claim 8, wherein the humidity of the seawater sand is greater than or equal to 65% and less than or equal to 85%.

10. The existing in-situ metal tube well oxidative corrosion barrier cleaning device as claimed in claim 8, wherein the top of the metal tube well is exposed to soil for at least 10 cm.

Technical Field

The invention belongs to the field of underground obstacle clearing, and particularly relates to an oxidation corrosion obstacle clearing method and device for an existing in-situ metal pipe well.

Background

In the urban updating process, a large number of underground obstacles are left in a construction site, and the information of the position, the shape, the size, the burial depth and the like of the underground obstacles is complex and uncertain, so that difficulty is brought to construction clearing work. Before the construction of foundation pit engineering, underground unknown obstacles in a construction site must be removed and broken so as to prevent a large number of obstacles from appearing in the construction process of the enclosure structure and influencing the construction progress.

The deep underground obstacles in the current building construction technical field mainly comprise concrete piles, metal pipes, wood piles and the like, and the obstacles are generally cleared by the following two methods: (1) obstacle removal of the rotary drilling rig: obstacles in areas with low environmental requirements, such as cast-in-place bored piles and the like, are complex and are removed by a rotary drilling rig, and although a mature technology exists, construction noise is high; (2) vibrating pile sinking and extracting machine: for the obstacles in the area with high environmental requirements, a vibration pile driver sinking and extracting mode is usually adopted for removing the obstacles, so that the method is simple, quick and effective, has low construction noise, has vibration and is high in cost;

in the current construction technical method and patent, no good method is available for removing underground obstacles such as metal pipe wells with deeper burial depth and small cross sections. The construction is carried out by adopting the prior rotary drilling rig technology, and because underground obstacles are deep, the construction has large influence on the environment and is easy to generate adverse factors on the construction; if the vibration pile driver sinking and pulling technology is adopted for removing obstacles, the obstacles are easy to be broken due to small cross section and poor construction effect, and the method has high construction cost and is not economical.

Disclosure of Invention

The invention aims to provide a method and a device for removing obstacles by oxidizing corrosion of an existing in-situ metal tube well, which have practicability and operability and solve the problems of large surrounding environment influence, large production cost and the like generated in the process of removing underground obstacles. In-situ oxidation corrosion utilizes metal electrochemical reaction to accelerate corrosion to reduce the strength of a basic structure, so that the basic structure is removed together with excavated soil after the basic structure is loose, vibration and noise of corresponding equipment such as a vibration pile driver, a rotary drilling rig and the like are reduced, and the operation is convenient, rapid and safe.

In order to solve the technical problems, the invention provides the following technical scheme:

an oxidation corrosion barrier removal method for an existing in-situ metal tube well comprises the following steps:

removing the covering soil on the upper part of the metal pipe well to expose the soil on the top of the metal pipe well;

corroding the metal pipe well;

and step three, corroding the metal pipe well until the metal pipe well is loosened and crushed to form metal pipe well residues, and digging out the metal pipe well residues together when the excavator is used for digging soil.

Preferably, in the existing in-situ metal tube well oxidation corrosion barrier cleaning method, the method further comprises a fourth step of sorting out metal tube well residues in the excavated soil by an electromagnetic method.

Preferably, in the above existing in-situ metal pipe well oxidation corrosion barrier removal method, in the second step, seawater sand is filled into the metal pipe well, the humidity of the seawater sand is greater than or equal to 65% and less than or equal to 85%, and the metal pipe well is naturally corroded by the seawater sand.

Preferably, in the existing in-situ metal pipe well oxidation corrosion barrier removal method, in the second step, freshwater sand containing 3-4% by weight of sodium chloride is filled into the metal pipe well, and the humidity of the freshwater sand is greater than or equal to 65% and less than or equal to 85%.

Preferably, in the above-mentioned existing in-situ metal tube well oxidation corrosion barrier cleaning method, in the second step, the metal tube well is corroded by an electrode accelerated corrosion method, where the electrode accelerated corrosion method is to insert a metal rod as a negative electrode into the metal tube well, the metal tube well is as a positive electrode, and the metal rod and the metal tube well are respectively connected to a power supply through a wire.

Preferably, in the existing in-situ metal tube well oxidation corrosion barrier cleaning method, the power supply is 36V, and the metal rod is

The reinforcing steel bar of (1).

Preferably, in the existing in-situ metal tube well oxidation corrosion barrier removing method, the outer diameter D of the metal tube well is less than 300mm, and the wall thickness is less than or equal to 4 mm.

Preferably, in the existing in-situ metal tube well oxidation corrosion barrier cleaning method, in the step one, the soil is exposed to at least 10cm from the top of the metal tube well.

The invention also discloses an oxidation corrosion barrier cleaning device for the existing in-situ metal pipe well, which comprises the seawater sand filled in the metal pipe well.

Preferably, in the existing in-situ metal tube well oxidative corrosion barrier cleaning device, the device further comprises a metal rod inserted into the metal tube well and a power supply, and the power supply is connected with the tube wall of the metal tube well and the upper end of the metal rod through wires respectively.

Preferably, in the existing in-situ metal pipe well oxidation corrosion barrier removal device, the humidity of the seawater sand is greater than or equal to 65% and less than or equal to 85%.

Preferably, in the existing in-situ metal tube well oxidative corrosion barrier cleaning device, the top of the metal tube well is exposed to soil by at least 10 cm.

According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:

according to the existing in-situ metal pipe well oxidation corrosion barrier removal method provided by the invention, the covering soil on the upper part of the metal pipe well is removed, so that the soil is exposed out of the top of the metal pipe well; through corroding the tubular metal resonator well for the loose broken back of tubular metal resonator well forms tubular metal resonator well residual, then utilize and dig out together when digging the machine and dig earth, accomplish the operation of removing obstacles, and the practicality has, maneuverability has solved and has clear away underground obstacle process and produced great all ring edge borders influence and great difficult problems such as manufacturing cost, and the tubular metal resonator well is corroded to the normal position, clears away with digging earth after making its texture loose and take off together, reduces and uses vibration pile driver, dig corresponding equipment vibrations and noise such as rig soon, convenient operation, swiftly, safety.

According to the existing in-situ metal pipe well oxidation corrosion barrier cleaning device provided by the invention, the metal pipe well is filled with seawater sand, the seawater sand contains a large amount of acidic substances, such as carbon dioxide, sulfur dioxide, hydrogen sulfide, sodium chloride and the like, which are contacted with moisture in the seawater sand to form acidic electrolytes capable of contacting with the seawater, and the acidic electrolytes can gradually corrode the metal pipe well, so that the metal pipe well is gradually broken and decomposed. The working principle is simple, and the operation is simple; the device has no mechanical operation, no vibration and no noise, and has small influence on the surrounding environment; the required materials and equipment are simple, the cost is low, and the popularization and the application are convenient.

Drawings

FIG. 1 is a schematic structural diagram of an existing in-situ metal tube well oxidation corrosion barrier cleaning device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an existing in-situ metal tube well oxidation corrosion barrier cleaning method according to another embodiment of the invention.

In the figure: 1-metal pipe well, 2-seawater sand, 3-metal bar and 4-power supply.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. The technical contents and features of the present invention will be described in detail below with reference to the embodiments illustrated in the accompanying drawings. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.